KR20250052253A - Brake system - Google Patents

Abstract

A brake system is disclosed. The brake system may include: a first power source supplying power of a first voltage; a motor driven by receiving power from the first power source to generate braking hydraulic pressure while the vehicle is driving; a second power source supplying power of a second voltage lower than the first voltage; and a controller supplying power from the second power source to control the motor.

Description

Brake system {Brake system}

The present invention relates to a brake system, and more specifically, to a brake system installed in a vehicle to generate braking force necessary to decelerate or stop the vehicle while the vehicle is driving.

Recently, electric brakes have been widely used in which the amount of brake pedal operation by the driver is transmitted as an electric signal to drive a motor, and braking pressure is generated according to the operation of the motor. Electric brakes can be configured to perform braking without driver intervention through autonomous control and operation of the motor, and thus have great utility in implementing autonomous driving technology.

Conventionally, a 12V battery is generally used as a power source for the electrical and electronic equipment of a vehicle. In this situation, the circuit for driving and controlling the electric brake is also designed for 12V.

Meanwhile, electric vehicles driven by motors that replace internal combustion engines have become widespread in recent years, and the braking system of electric vehicles consists of electric brakes. Electric vehicles are equipped with batteries that provide higher voltage (e.g., 48 V) than conventional ones as a driving power source. Accordingly, the adoption of the high-voltage battery as a power source for electric brakes mounted on electric vehicles is being considered in order to improve efficiency.

However, if the power supply for the control and drive circuits of the electric brake is replaced with the high-voltage battery, development and mass production of new circuit elements are required, which may cause problems in terms of economic feasibility. In addition, although a high-voltage power supply is effective for driving the motor that generates braking hydraulic pressure in the electric brake, a low-voltage power supply is also more efficient for the control circuits other than this.

Korean Patent No. 1001268, “Solenoid driving circuit and error diagnosis method”, registered on December 8, 2010

The present invention is intended to solve the above problems, and an object of the present invention is to provide a brake system that maximizes the efficiency of power use and the economy of circuit configuration through a combination of a high-voltage power source and a low-voltage power source.

Another object of the present invention is to provide a brake system that utilizes a dual power source consisting of a high-voltage power source and a low-voltage power source, while being capable of providing redundancy by a low-voltage power source when the high-voltage power source fails to supply power.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

According to one aspect of the present invention, a brake system of a vehicle is provided, comprising: a first power source supplying power of a first voltage; a motor driven by receiving power from the first power source to generate braking hydraulic pressure while the vehicle is driving; a second power source supplying power of a second voltage lower than the first voltage; and a controller supplying power from the second power source to control the motor.

A brake system according to one aspect of the present invention further includes an inverter disposed between the first power source and the motor and converting power supplied from the first power source to the motor, and the controller can transmit an inverter control signal for controlling the inverter.

A brake system according to one aspect of the present invention may further include a motor driver disposed between the controller and the inverter, the motor driver converting the inverter control signal transmitted by the controller into a signal for operating the inverter.

A brake system according to one aspect of the present invention further includes a valve for controlling the flow of the braking hydraulic pressure, and the controller can control the valve by receiving power from the second power source.

A brake system according to one aspect of the present invention may further include a switch disposed between the first power source and the motor to control on/off power supplied from the first power source to the motor.

In a brake system according to one aspect of the present invention, the controller can receive monitoring information on at least one of voltage or current supplied from the first power source from the switch.

A brake system according to one aspect of the present invention may further include a regulator disposed between the second power source and the controller to adjust the voltage of power supplied from the second power source to the controller.

A brake system according to one aspect of the present invention further includes a motor position sensor for sensing a position of the motor, and the controller can supply power to the motor position sensor and receive motor position information from the motor position sensor.

A brake system according to one aspect of the present invention further includes a pedal displacement sensor for sensing displacement of a brake pedal of the vehicle, and the controller can supply power to the pedal displacement sensor and receive pedal displacement information from the pedal displacement sensor.

A brake system according to one aspect of the present invention further includes a pressure sensor for sensing braking pressure supplied to a wheel of the vehicle, and the controller can supply power to the pressure sensor and receive braking pressure information from the pressure sensor.

A brake system according to one aspect of the present invention further includes a wheel speed sensor for sensing a speed of a wheel of the vehicle, and the controller can supply power to the wheel speed sensor and receive wheel speed information from the wheel speed sensor.

A brake system according to one aspect of the present invention further includes an electronic parking brake driver that controls an electronic parking brake that provides parking braking force for maintaining a parked state when the vehicle is parked, and the controller can supply power to the electronic parking brake driver and transmit a control signal for controlling the electronic parking brake.

According to another aspect of the present invention, a brake system of a vehicle is provided, comprising: a first power source supplying power of a first voltage; a motor driven by receiving power from the first power source to generate braking hydraulic pressure while the vehicle is driving; a second power source supplying power of a second voltage lower than the first voltage; a controller supplied with power from the second power source to control the motor; and a converter disposed between the second power source and the motor and boosting the voltage supplied by the second power source to the first voltage; wherein, when the supply of power from the first power source to the motor becomes impossible, the controller boosts the power supplied from the second power source to the first voltage through the converter and supplies the same to the motor.

A brake system according to another aspect of the present invention further includes an inverter disposed between the first power source and the motor and converting power supplied from the first power source to the motor, and the controller can transmit an inverter control signal for controlling the inverter.

A brake system according to another aspect of the present invention may further include a motor driver disposed between the controller and the inverter, the motor driver converting the inverter control signal transmitted by the controller into a signal for operating the inverter.

A brake system according to another aspect of the present invention further includes a valve arranged to control the flow of the braking hydraulic pressure, and the controller can control the valve by receiving power from the second power source.

A brake system according to another aspect of the present invention may further include a switch disposed between the first power source and the motor to control on/off power supplied from the first power source to the motor.

In a brake system according to another aspect of the present invention, the controller can receive monitoring information on at least one of voltage or current supplied from the first power source from the switch.

A brake system according to another aspect of the present invention may further include a regulator disposed between the second power source and the controller to adjust the voltage of power supplied from the second power source to the controller.

A brake system according to another aspect of the present invention further includes a motor position sensor for sensing the position of the motor, and the controller can supply power to the motor position sensor and receive motor position information from the motor position sensor.

According to the above configuration, the brake system according to one aspect of the present invention adopts a first power supply as a driving power supply for the motor, and adopts a second power supply providing a lower voltage than the first power supply as a power supply for the controller controlling the motor, thereby achieving both efficiency in power use and economy in circuit configuration.

A brake system according to one aspect of the present invention utilizes a dual power source consisting of a first power source of relatively high voltage and a second power source of relatively low voltage, and provides redundancy through the second power source and converter when the first power source fails to supply power, thereby improving the safety of the vehicle.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the composition of the invention described in the detailed description or claims of the present invention.

FIG. 1 is a drawing briefly showing the configuration of a brake system according to one embodiment of the present invention.
FIG. 2 is a drawing showing in detail the configuration of a brake system according to one embodiment of the present invention.
FIG. 3 is a drawing briefly showing the configuration of a brake system according to another embodiment of the present invention.
FIG. 4 is a drawing showing in detail the configuration of a brake system according to another embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those with ordinary skill in the art can easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts that are not related to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

The words and terms used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be interpreted as having meanings and concepts consistent with the technical idea of the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best describe his or her invention.

In this specification, it should be understood that terms such as “include” or “have” are intended to describe the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Fig. 1 is a drawing briefly showing the configuration of a brake system according to one embodiment of the present invention. Fig. 2 is a drawing showing in detail the configuration of a brake system according to one embodiment of the present invention.

A brake system (100) according to one embodiment of the present invention is applied to a vehicle. More specifically, the brake system (100) is placed in a vehicle and generates braking force necessary to decelerate or stop the vehicle while the vehicle is driving.

The brake system (100) may be an electric brake system in which the amount of brake pedal operation by the driver is transmitted as an electric signal to drive a motor, and braking pressure is generated according to the operation of the motor. In addition, it may be considered that the brake system (100) is installed in a vehicle capable of autonomous driving, so that the motor is driven according to the driving situation without the driver's brake pedal operation, and braking pressure is generated according to the operation of the motor.

Referring to FIGS. 1 and 2, a brake system (100) according to one embodiment of the present invention includes a first power source (101) and a second power source (102). That is, the brake system (100) has a dual power source structure.

The first power source (101) supplies power of the first voltage. More specifically, the first power source (101) can supply a direct current power source having the first voltage. The first power source (101) can be a battery that provides the first voltage. For example, the first voltage can be 48 V.

The second power source (102) supplies power having a second voltage lower than the first voltage. More specifically, the second power source (102) can supply a direct current power source having the second voltage. The second power source (102) can be a battery that provides the second voltage. For example, the second voltage can be 12 V.

The power of the first voltage supplied by the first power source (101) is used to drive the motor (105). Meanwhile, the power of the second voltage supplied by the second power source (102) can be used to control the motor (105). More specifically, the second power source (102) can be used to operate the controller (110) that controls the motor (105).

A brake system (100) may include a first circuit (A1) including a motor (105) driven by a first power source (101) and components for driving or monitoring the motor (105), and a second circuit (A2) including a controller (110) operated by a second power source (102).

In one embodiment of the present invention, a first circuit (A1) includes a motor (105), a switch (103), an inverter (104), a motor driver (106), a motor position sensor (107), and a current sensor (108).

The motor (105) is driven by receiving power from the first power source (101) to generate braking hydraulic pressure while the vehicle is running. For example, the motor (105) may be a three-phase motor.

The motor (105) can operate a pump (not shown) that generates braking hydraulic pressure. In other words, the pump can be operated by driving the motor (105) to generate braking hydraulic pressure.

A switch (103) is placed between the first power source (101) and the motor (105) to turn on/off the power supplied from the first power source (101) to the motor (105). The switch (103) can transmit monitoring information on at least one of the voltage and current supplied from the first power source (101) to the controller (110).

The inverter (104) is arranged between the first power source (101) and the motor (105) and converts power supplied from the first power source (101) to the motor (105). More specifically, the inverter (104) may be arranged between the switch (103) and the motor (105).

The inverter (104) can convert the direct current power supplied from the first power source (101) into alternating current power. As described above, the motor (105) can be a three-phase motor, and the inverter (104) can convert the direct current power of the first voltage supplied from the first power source (101) into alternating current power capable of driving the three-phase motor.

The inverter (104) may include a plurality of FETs that operate under the control of the controller (110). When the FETs of the inverter (104) operate, power of the first voltage supplied by the first power source (101) may be supplied to the U phase, V phase, and W phase of the motor, respectively.

The inverter (104) can be operated by an inverter control signal transmitted by the controller (110). At this time, the inverter control signal can be a signal in the form of PWM (Pulse Width Modulation).

The motor driver (106) converts the inverter control signal transmitted by the controller (110) into a signal for the inverter (104) to operate. The motor driver (106) can change the voltage of the inverter control signal transmitted by the controller (110) into a voltage at which the inverter (104) can operate and provide it to the inverter (104).

For example, when the inverter control signal is a PWM signal having a voltage level corresponding to the operating voltage of the controller (110), the motor driver (106) can change the voltage level of the inverter control signal to a voltage level at which the inverter (104) can operate.

The motor position sensor (107) senses the position of the motor (105). The motor position information sensed by the motor position sensor (107) can be utilized to control the motor (105). The motor position sensor (107) can transmit the motor position information to the controller (110).

The current sensor (108) senses the current of the motor (105). The motor current information sensed by the current sensor (108) can be utilized for controlling the motor (105). The current sensor (108) can transmit the motor current information to the controller (110).

In one embodiment of the present invention, the second circuit (A2) may include a controller (110), a regulator (109), a valve (111), an electronic parking brake driver (112), a pedal displacement sensor (113), a pressure sensor (114), and a wheel speed sensor (115).

The controller (110) receives power from the second power source (102) and controls the motor (105). The controller (110) may include one or more MCUs (Micro Controller Units).

The controller (110) can control the motor (105) by controlling the inverter (104) that converts power supplied from the first power source (101) to the motor (105). In other words, the controller (110) can transmit an inverter control signal for controlling the inverter (104).

The above inverter control signal may be a signal in the form of PWM (Pulse Width Modulation). At this time, the voltage level of the inverter control signal may have the operating voltage of the controller (110).

The controller (110) can transmit the inverter control signal to the motor driver (106). The voltage level of the inverter control signal has an operating voltage of the controller (110), which may be different from the voltage at which the inverter (104) can operate. As described above, the voltage of the inverter control signal transmitted by the controller (110) can be changed by the motor driver (106) into a voltage at which the inverter (104) can operate and provided to the inverter (104).

The controller (110) can receive monitoring information on one or more of the voltage or current supplied from the first power source (101) from the switch (103). The controller (110) can determine whether the first power source (101) is normally supplying power based on the monitoring information received from the switch (103).

The controller (110) supplies power to the motor position sensor (107). In addition, the controller (110) receives motor position information from the motor position sensor (107). The motor position sensor (107) does not require high voltage power for operation compared to the motor (105). Accordingly, it is efficient for the controller (110) operating at a voltage level lower than the first voltage to supply power to the motor position sensor (107).

Meanwhile, the controller (110) can supply power to the valve (111), the electronic parking brake driver (112), the pedal displacement sensor (113), the pressure sensor (114), and the wheel speed sensor (115). In addition, the controller (110) can control the valve (111) and the electronic parking brake driver (112). In addition, the controller (110) can receive pedal displacement information from the pedal displacement sensor (113), braking pressure information from the pressure sensor (114), and wheel speed information from the wheel speed sensor (115).

A regulator (109) is arranged between the second power source (102) and the controller (110) to adjust the voltage of power supplied from the second power source (102) to the controller (110). In one embodiment of the present invention, the regulator (109) may be configured as an ASIC (Application Specific Integrated Circuit).

The operating voltage of the controller (110) may be a lower voltage than the second voltage supplied by the second power source (102). For example, the second voltage may be 12 V, and the operating voltage of the controller (110) may be 3.3 V. In this case, the regulator (109) may adjust the voltage of 12 V supplied by the second power source (102) to 3.3 V.

The valve (111) controls the flow of braking hydraulic pressure generated by driving the motor (105). A plurality of valves (111) may be arranged in a hydraulic circuit through which the generated braking hydraulic pressure flows. For example, the valve (111) may be a solenoid valve.

The valve (111) can be controlled by the controller (110). In other words, the controller (110) can control the valve (111) by receiving power from the second power source (102).

The electronic parking brake driver (112) controls an electronic parking brake that provides parking braking force to maintain the vehicle in a parked state when the vehicle is parked. For example, the electronic parking brake may be a motor on caliper (MoC) type parking brake.

The electronic parking brake driver (112) can be controlled by the controller (110). That is, the controller (110) can supply power to the electronic parking brake driver and transmit a control signal for controlling the electronic parking brake.

The pedal displacement sensor (113) senses the displacement of the brake pedal of the vehicle. The pedal displacement sensor (113) can sense at least one of the angle or movement distance of the brake pedal. The pedal displacement information sensed by the pedal displacement sensor (113) can be utilized by the controller (110) to control the motor (105).

The pedal displacement sensor (113) can be controlled by the controller (110). Specifically, the controller (110) can supply power to the pedal displacement sensor (113). In addition, the controller (110) can receive pedal displacement information from the pedal displacement sensor (113).

The pressure sensor (114) senses the braking pressure supplied to the wheel of the vehicle. The pressure sensor (114) can sense the braking pressure supplied to the wheel side of the vehicle so that the brake pad presses the disc. The braking pressure information sensed by the pressure sensor (114) can be utilized by the controller (110) to control the motor (105).

The pressure sensor (114) can be controlled by the controller (110). More specifically, the controller (110) can supply power to the pressure sensor (114). Additionally, the controller (110) can receive braking pressure information from the pressure sensor (114).

The wheel speed sensor (115) senses the wheel speed of the vehicle. The wheel speed sensor (115) may be placed on each of a plurality of wheels of the vehicle. The wheel speed information sensed by the wheel speed sensor (115) may be utilized as one of the variables for the controller (110) to control the motor (105).

The wheel speed sensor (115) can be controlled by the controller (110). More specifically, the controller (110) can supply power to the wheel speed sensor (115). Additionally, the controller (110) can receive wheel speed information from the wheel speed sensor (115).

So far, a brake system (100) according to one embodiment of the present invention has been described in detail. Below, a brake system (200) according to another embodiment of the present invention will be described.

FIG. 3 is a drawing briefly showing the configuration of a brake system according to another embodiment of the present invention. In addition, FIG. 4 is a drawing showing in detail the configuration of a brake system according to another embodiment of the present invention.

Referring to FIGS. 3 and 4, a brake system (200) according to another embodiment of the present invention includes a first power source (201) and a second power source (202). The first power source (201) and the second power source (202) provide a dual power source structure.

The first power source (201) supplies power of the first voltage. The first power source (201) may be a battery that supplies direct current power having the first voltage. In this case, the first voltage may be 48 V.

The second power source (202) supplies power of a second voltage lower than the first voltage. The second power source (202) may be a battery that supplies direct current power having the second voltage. In this case, the second voltage may be 12 V.

The first voltage power supplied by the first power source (201) is used to drive the motor (205). Meanwhile, the second voltage power supplied by the second power source (202) is used to operate the controller (210) that controls the motor (205).

A brake system (200) according to another embodiment of the present invention may include a motor (205) driven by a first power source (201), a first circuit (B1) including components for driving or monitoring the motor (205), and a second circuit (B2) including a controller (210) operated by a second power source (202).

In another embodiment of the present invention, a first circuit (B1) includes a motor (205), a switch (203), an inverter (204), a motor driver (206), a motor position sensor (207), and a current sensor (208).

In another embodiment of the present invention, the second circuit (B2) may include a controller (210), a regulator (209), a valve (211), an electronic parking brake driver (212), a pedal displacement sensor (213), a pressure sensor (214), and a wheel speed sensor (215).

The components arranged in the first circuit (B1) and the second circuit (B2) are the same as those of the brake system (100) according to one embodiment of the present invention. In other words, the motor (205), the switch (203), the inverter (204), the motor driver (206), the motor position sensor (207), the current sensor (208), the regulator (209), the valve (211), the electronic parking brake driver (212), the pedal displacement sensor (213), the pressure sensor (214), and the wheel speed sensor (215) are the same as those of the one embodiment of the present invention. Therefore, when describing the brake system (200) according to another embodiment of the present invention, any overlapping parts with those described in relation to the one embodiment of the present invention will be omitted.

A brake system (200) according to another embodiment of the present invention further includes a converter (220) compared to the brake system (100) according to another embodiment of the present invention. Hereinafter, the contents related to the converter (220) will be examined in detail.

The converter (220) is placed between the second power source (202) and the motor (205), and boosts the voltage supplied by the second power source (202) to the first voltage. The converter (220) enables the second power source (202) to take over the role of the first power source (201) when the power supply by the first power source (201) is unavailable.

The converter (220) can be controlled by the controller (210). More specifically, when power supply from the first power source (201) to the motor (205) becomes unavailable, the controller (210) boosts the power supplied from the second power source (202) to the first voltage through the converter (220) and supplies it to the motor (205).

In this regard, the switch (203) can transmit monitoring information on at least one of the voltage or current supplied from the first power source (201) to the controller (210). The controller (210) receives monitoring information on at least one of the voltage or current supplied from the first power source (201) from the switch (203), and can determine whether power supply from the first power source (201) to the motor (205) is unavailable through the received monitoring information.

When it is determined that power supply from the first power source (201) to the motor (205) is unavailable, the controller (210) boosts the power supplied from the second power source (202) to the first voltage through the converter (220) and supplies it to the motor (205). Accordingly, even if a failure occurs in the first power source (201), the motor (205) can operate.

According to another embodiment of the present invention, even in a situation where power supply by the first power source (201) becomes impossible while the vehicle is driving, the generation of braking hydraulic pressure through the motor (205) can be continuously performed. Accordingly, safety risks due to loss of braking power can be avoided.

The brake system according to the present invention provides a dual power supply structure in which a first power supply having a first voltage that is relatively high supplies power to a motor, and a second power supply having a second voltage that is lower than the first voltage supplies power to a controller having a low driving voltage.

This structure improves the driving efficiency of the motor while allowing the use of the motor control circuit designed for a conventional power source with a relatively low voltage. Accordingly, the present invention can achieve both the efficiency of the motor driving and the economy of the circuit design in the motor driving.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit. However, this will also be considered to fall within the spirit of the present invention.

100, 200: Brake System
101, 201: 1st Power
102, 202: Second Power
105, 205: Motor
110, 210: Controller

Claims (20)

In the braking system of a vehicle,
A first power source supplying power of the first voltage;
A motor driven by receiving power from the first power source to generate braking hydraulic pressure while the vehicle is running;
a second power source supplying power of a second voltage lower than the first voltage; and
A brake system including a controller that controls the motor by receiving power from the second power source. In paragraph 1,
Further comprising an inverter disposed between the first power source and the motor and converting power supplied from the first power source to the motor,
The above controller is a brake system that transmits an inverter control signal for controlling the inverter. In the second paragraph,
A brake system further comprising a motor driver disposed between the controller and the inverter and converting an inverter control signal transmitted by the controller into a signal for operating the inverter. In paragraph 1,
Further comprising a valve for controlling the flow of the above braking hydraulic pressure,
The above controller is a brake system that controls the valve by receiving power from the second power source. In paragraph 1,
A brake system further comprising a switch disposed between the first power source and the motor to control on/off power supplied from the first power source to the motor. In paragraph 5,
A brake system wherein the controller receives monitoring information about at least one of voltage or current supplied from the first power source from the switch. In paragraph 1,
A brake system further comprising a regulator disposed between the second power source and the controller to adjust the voltage of power supplied from the second power source to the controller. In paragraph 1,
Further comprising a motor position sensor for sensing the position of the above motor,
A brake system in which the above controller supplies power to the above motor position sensor and receives motor position information from the above motor position sensor. In paragraph 1,
Further comprising a pedal displacement sensor for sensing displacement of a brake pedal of the vehicle;
A brake system wherein the controller supplies power to the pedal displacement sensor and receives pedal displacement information from the pedal displacement sensor. In paragraph 1,
Further comprising a pressure sensor for sensing braking pressure supplied to a wheel of the vehicle;
A brake system in which the above controller supplies power to the pressure sensor and receives braking pressure information from the pressure sensor. In paragraph 1,
Further comprising a wheel speed sensor for sensing the speed of the wheels of the vehicle;
A brake system wherein the controller supplies power to the wheel speed sensor and receives wheel speed information from the wheel speed sensor. In paragraph 1,
Further comprising an electronic parking brake driver that controls an electronic parking brake that provides parking braking force to maintain the parked state when the above vehicle is parked,
A brake system in which the above controller supplies power to the electronic parking brake driver and transmits a control signal for controlling the electronic parking brake. In the braking system of a vehicle,
A first power source supplying power of the first voltage;
A motor driven by receiving power from the first power source to generate braking hydraulic pressure while the vehicle is running;
A second power source supplying power of a second voltage lower than the first voltage;
A controller that controls the motor by receiving power from the second power source; and
A converter is disposed between the second power source and the motor and boosts the voltage supplied by the second power source to a first voltage;
The above controller is a brake system that boosts the power supplied from the second power source to the first voltage through the converter and supplies it to the motor when the power supply from the first power source to the motor becomes unavailable. In Article 13,
Further comprising an inverter disposed between the first power source and the motor and converting power supplied from the first power source to the motor,
The above controller is a brake system that transmits an inverter control signal for controlling the inverter. In Article 14,
A brake system further comprising a motor driver disposed between the controller and the inverter and converting an inverter control signal transmitted by the controller into a signal for operating the inverter. In Article 13,
Further comprising a valve arranged to control the flow of the above braking hydraulic pressure,
The above controller is a brake system that controls the valve by receiving power from the second power source. In Article 13,
A brake system further comprising a switch disposed between the first power source and the motor to control on/off power supplied from the first power source to the motor. In Article 17,
A brake system wherein the controller receives monitoring information about at least one of voltage or current supplied from the first power source from the switch. In Article 13,
A brake system further comprising a regulator disposed between the second power source and the controller to adjust the voltage of power supplied from the second power source to the controller. In Article 13,
Further comprising a motor position sensor for sensing the position of the above motor,
A brake system in which the above controller supplies power to the above motor position sensor and receives motor position information from the above motor position sensor.

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