CN105743373B - A kind of multiple protective DC voltage regulation device and method - Google Patents

Abstract

The invention relates to a multi-protection DC voltage regulating device and method, comprising an input rectification module, a boost inductor, an input detection module, a shutdown protection module, a boost module, a step-down module, a freewheeling inductor and an output control module. The invention adjusts the unstable voltage and current to a more stable power supply that can be effectively used by users; the control chip automatically detects the input and output voltage values to confirm the working state of the top circuit; it is composed of normally open and normally closed contacts of a relay and an adjustment circuit Mechanical and circuit interlocking structure, multiple protections from current impact, making it run smoothly, safe and reliable.

Description

A kind of multi-protection DC voltage regulating device and method

technical field

The patented technology of the present invention relates to the control field of rational utilization of DC power supply, in particular to a multi-protection DC voltage regulating device and method.

Background technique

At present, there are many devices that convert other forms of energy into electrical energy for recycling, such as the elevator’s no-load, heavy-load energy feedback, small wind power, and small solar power. Often inverters are used to directly feed the electric energy back to the grid, although some can be recovered Energy, but its large quantity, small unit capacity, difficult phase control, high manufacturing cost, easy damage to electrical components, poor safe operation, and easy to cause interference to the power grid make it unfavorable for popularization and use.

If a simple method can be used to solve the collection and conversion of its feedback energy, the recovered energy can be used more effectively, and multiple protection measures can be used to greatly improve its reliability and longer service life. It is the promotion of some small energy-saving Issues that need to be solved urgently for emission reduction products.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a practical DC voltage regulating device, which allows its input terminal to be connected to the voltage and current of an unstable power supply, and is reasonably adjusted to match the power grid voltage and output a stable power supply. The user chooses to use it, and the unique mechanical and circuit interlocking structure protects its electrical components from current impact, making it run smoothly, safely and reliably.

The technical solution adopted by the present invention to achieve the above object is: a multiple protection DC voltage regulator, the input end of the input rectification module 1 is connected to the input power supply, the output end of the input rectification module 1 is connected to the shutdown protection module, and the shutdown protection module is connected to the control Chip, the other output end of the input rectification module 1 is connected to the input end of the control diode 5, the output end of the control diode 5 is respectively connected to the energy storage battery pack 6, the boost inductor 4 and the input detection module, and the output end of the input detection module is connected to the control Chip 22;

The output end of the boost inductor 4 is connected to the input end of the isolation diode 8, one output end of the boost module 7 is connected to the control chip 22 through the boost thermal protection optocoupler 24, and the other output end of the boost module 7 is connected to the isolation diode the input terminal;

One output end of the control chip 22 is sequentially connected to the boost drive resistor 25, the boost drive optocoupler 23 and the boost module 7; the other output end of the control chip 22 is sequentially connected to the step-down drive resistor 28, the step-down drive optocoupler 26 and step-down module 10;

The step-up drive optocoupler 23 is connected to the step-down drive optocoupler 26 through the voltage conversion relay 27 and the step-down blocking resistor 29 in turn, and the voltage conversion relay 27 is also connected to the control chip 22;

The output ends of the isolation diode 8 are respectively connected to the first decoupling capacitor 9 and the step-down module 10, one output end of the step-down module 10 is connected to the control chip 22 through the step-down thermal protection optocoupler 27, and the other output end is connected to the freewheeling inductor 12;

The output end of the freewheeling inductor 12 is respectively connected to the second decoupling capacitor 14 , the damping diode and the piezoresistor 13 , and the other output end of the freewheeling inductor 12 is connected to the control chip 22 through the output detection module.

The shutdown protection module includes a first shutdown protection relay 2, a second shutdown protection relay 15 and a protection electric load 3, wherein the input end of the first shutdown protection relay 2 is connected to the input rectifier module 1, the output end is connected to the protection electric load 3, and the second The input end of the machine protection relay 15 is connected to the control chip 22 , and the output end is connected to the first shutdown protection relay 2 .

The input detection module includes an input voltage detection 16 , an input detection optocoupler 17 and an input detection adjustment resistor 18 connected in sequence.

The output detection module includes an output voltage detection 19 , an output detection optocoupler 20 and an output detection adjustment 21 connected in sequence.

A method for regulating DC voltage with multiple protections, comprising the following steps:

Power on the system, and the control chip detects the input voltage through the input detection adjustment resistor 18;

When the boost is adjusted, the control chip 22 drives the voltage conversion relay 27 to work, and the boost drive optocoupler 23 is connected to the external power supply through the voltage conversion relay 27; the step-down drive optocoupler 26 is connected to the step-down blocking resistor 29 through the voltage conversion relay 27 Turning it on to make it fully conductive, the current boosted by the boost inductor 4 passes through the step-down module 10 to the output terminal;

When the step-down is adjusted, the control chip 22 drives the voltage conversion relay 27 to reset, and the boost-driven optocoupler 23 is disconnected from the external power supply through the voltage conversion relay 27, so that it cannot work due to power loss, and the step-down drive optocoupler 26 is converted by voltage The relay 27 is connected to the step-down drive resistor 28, and then connected to the control chip 22, and the step-down module 10 outputs a PWM wave to control the output terminal voltage.

The present invention has the following beneficial effects and advantages:

1. Adjust the unstable voltage and current to a relatively stable power supply that can be effectively utilized by the user;

2. The control chip automatically detects the input and output voltage values to determine the working state of the circuit;

3. The normally open and normally closed contacts of the relay and the regulating circuit are used to form a mechanical and circuit interlocking structure, which protects it from current impact and makes it run smoothly, safely and reliably.

Description of drawings

Fig. 1 is a block diagram of the present invention;

Fig. 2 is a circuit structure diagram of the present invention;

Among them, 1 is the input rectifier module, 2 is the first shutdown protection relay, 3 is the protection electric load, 4 is the boost inductor, 5 is the control diode, 6 is the energy storage battery pack, 7 is the boost module, 8 is the isolation diode , 9 is the first decoupling capacitor, 10 is the step-down module, 11 is the damping diode, 12 is the freewheeling inductor, 13 is the varistor, 14 is the second decoupling capacitor, 15 is the second power failure protection relay, 16 is Input voltage detection resistor, 17 is input detection optocoupler, 18 is input detection adjustment resistor, 19 is output voltage detection resistor, 20 is output detection optocoupler, 21 is output detection adjustment resistor, 22 is control chip, 23 is boost drive Optocoupler, 24 is a boost thermal protection optocoupler, 25 is a boost drive resistor, 26 is a step-down drive optocoupler, 27 is a voltage conversion relay, 28 is a step-down drive resistor, and 29 is a step-down blocking resistor.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in the figure, the main structure of the patented technology circuit of the present invention includes:

The rectifier module at the input end has UzA, UzB, and UzC input terminals. The output negative terminal is the common ground terminal GND, and the output positive terminal is connected to the relay protection contact K1-J and the control diode D1. The other end of the relay protection contact K1-J is connected to the protection circuit. The load BF is connected, the other end of the control diode D1 is connected to the boost inductor L1, the energy storage battery pack BF, and the input voltage detection resistor BR1, the other end of the boost inductor L1 is connected to the boost module IFM1, and the isolation diode D2, and the other end of the isolation diode D2 Connect with the decoupling capacitor C1 and the step-down module IFM2, the output end of the step-down module IFM2 is connected with the damping diode D3 and the freewheeling inductor L2, the other end of the freewheeling inductor L2 is connected with the varistor RW, the decoupling capacitor C2, and the output voltage detection resistor BR2 connection (this point is also the circuit output), the other end of the output voltage detection resistor BR2 is connected to the output voltage detection optocoupler BGJ2, the output voltage detection optocoupler BGJ2 is connected to the output voltage detection adjustment resistor RT2, and the P0.6 terminal of the control chip F410 , the other end of the output voltage detection adjustment resistor RT2 is connected to U3-5V, the step-down thermal protection optocoupler RB2 is connected to the control chip F410P0.2, the P0.0 of the control chip F410 is connected to the boost thermal protection optocoupler RB1, and the input voltage detection Resistor BR1 is connected to input voltage detection optocoupler BGJ1, input voltage detection optocoupler BGJ1 is connected to P1.0 of control chip F410, input voltage detection adjustment resistor RT1, the other end of input voltage detection adjustment resistor RT1 is connected to U3-5V, boost The drive optocoupler QD1 is connected to the boost drive resistor RK-1, the other end of the boost drive resistor RK-1 is connected to the control chip F410P0.1, the other end of the boost drive optocoupler QD1 is connected to a moving contact of the voltage conversion relay K2, the voltage The other end of the moving contact of the conversion relay K2 is connected to U3-5V, the step-down driving optocoupler QD2 is connected to the other moving contact of the voltage conversion relay K2, and one end of the other moving contact of the voltage conversion relay K2 is connected to the step-down locking resistor RK-3, The other end is connected to the step-down drive resistor RK-2, the other end of the step-down drive resistor RK-2 is connected to the control chip F410P0.3, the shutdown protection relay K1 is connected to the control chip F410P0.5, and the other end of the shutdown protection relay K1 is connected to U3- 5V power supply connection, its moving contact is K1-J.

When the multi-protection DC voltage regulator is not started, because the shutdown protection relay K1 loses power, the relay protection contact K1-J is connected. When the load BF is connected, it will not cause impact on other devices.

When the multi-protection DC voltage regulator starts, the control chip F410 detects the input voltage through the input voltage detection adjustment resistor RT1.

If boost adjustment is required, the control chip F410 drives the voltage conversion relay K2 to act, and connects the boost-driven optocoupler QD1 to the U3-5V power supply through the contact point of the voltage conversion relay K2, so that it can be boosted to work when it is powered, and the voltage is driven to drive the light. The coupling QD is connected to the step-down blocking resistor RK-3 through the contact point of the voltage conversion relay K2 to make it fully conductive, and the current boosted by the boost inductor L1 goes through the step-down module IFM2 to the output terminal.

If step-down adjustment is required, the control chip F410 drives the voltage conversion relay K2 to reset, and the step-up drive optocoupler QD1 is disconnected from the U3-5V power supply through the contact point of the voltage conversion relay K2, so that it cannot work when it loses power, and the step-down drives the optocoupler QD is connected to the step-down drive resistor RK-2 through the contact point of the voltage conversion relay K2, and then connected to the control chip F410P0.3. The step-down module IFM2 outputs PWM waves to control the voltage of the output terminal to achieve the step-down effect.

In this way, through the two sets of contacts of the voltage conversion relay K2, it is ensured that during the voltage adjustment process of the multi-protection DC voltage regulator, the step-up module IFM1 and the step-down module IFM2 are reliably protected, and there is no conflict between them.

Claims (5)

1. a kind of multiple protective DC voltage regulation device, it is characterised in that：The input terminal connection input of input rectifying module (1) The output end of power supply, input rectifying module (1) connects stoppage protection module, and stoppage protection module connection control chip inputs whole The input terminal of another output end connection control diode (5) of flow module (1), the output end of control diode (5) connect respectively Energy storage battery group (6), boost inductance (4) and input detection module are connect, the output end connection control chip of detection module is inputted (22)；

The input terminal of the output end connection isolating diode (8) of boost inductance (4), an output end of boost module (7) pass through Boosting heat protects optocoupler (24) and is connected to control chip (22), another output end of boost module (7) is connected to isolating diode Input terminal；

One output end of control chip (22) is sequentially connected with boosting driving resistance (25), boosting driving optocoupler (23) and boosting mould Block (7)；Another output end of control chip (22) is sequentially connected with decompression driving resistance (28), decompression driving optocoupler (26) and drop Die block (10)；

Boosting driving optocoupler (23) passes sequentially through voltage switching relay (27) and decompression latch-up resistance (29) is connected to decompression and drives Dynamic optocoupler (26), the voltage switching relay (27) are also connected with control chip (22)；

The output end of isolating diode (8) is separately connected the first decoupling capacitance (9) and voltage reduction module (10), voltage reduction module (10) One output end is connected to control chip (22) by being depressured heat guarantor's optocoupler (27), another output end connects afterflow inductance (12)；

The output end of afterflow inductance (12) is separately connected the second decoupling capacitance (14), damper diode and varistor (13), continues Another output end of galvanic electricity sense (12) is by exporting detection module connection control chip (22).

2. multiple protective DC voltage regulation device according to claim 1, it is characterised in that：The stoppage protection module Including the first stoppage protection relay (2), the second stoppage protection relay (15) and protection electric loading (3), wherein first shuts down Protective relay (2) input terminal connects input rectifying module (1), output end connection protection electric loading (3), and the second machine protects relay Device (15) input terminal connection control chip (22), output end connect the first stoppage protection relay (2).

3. multiple protective DC voltage regulation device according to claim 1, it is characterised in that：The input detection module Including input voltage measurement connected in sequence (16), input detection optocoupler (17) and input detection adjustment resistance (18).

4. multiple protective DC voltage regulation device according to claim 1, it is characterised in that：The output detection module Including output voltage connected in sequence detection (19), output detection optocoupler (20) and output detection adjustment (21).

5. a kind of multiple protective DC voltage regulation method according to any one of Claims 1 to 4 described device, feature exists In including the following steps：

To system electrification, control chip detects adjustment resistance (18) through input and detects input voltage；

When boosting adjusts, control chip (22) driving voltage switching relay (27) works, and drives optocoupler (23) to pass through boosting Voltage switching relay (27) is connect with external power supply；Decompression driving optocoupler (26) is closed through voltage switching relay (27) with decompression Lock resistance (29), which is connected, keeps its fully on, and the electric current that boost inductance (4) is promoted is through voltage reduction module (10) to output end；

When being depressured adjustment, control chip (22) driving voltage switching relay (27) resets, will boosting driving optocoupler (23) warp Voltage switching relay (27) is disconnected with external power supply, prevents its dead electricity from working, and decompression driving optocoupler (26) is converted through voltage Relay (27) is connected with decompression driving resistance (28), then is connected with control chip (22), and voltage reduction module (10) exports PWM wave control Output end voltage processed.