JP5780000B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device.

  An elevator system using an electric double layer capacitor has been proposed. According to this system, charging / discharging of the electric double layer capacitor is controlled based on the charging voltage of the electric double layer capacitor (see, for example, Patent Document 1).

  In addition, a system that controls charging / discharging of the electric double layer capacitor based on the charging voltage and temperature of the electric double layer capacitor has also been proposed (see, for example, Patent Document 2).

JP 2008-189440 A JP 2009-273305 A

  However, those described in Patent Documents 1 and 2 do not consider the charge / discharge time of the electric double layer capacitor. For this reason, the value of the charge / discharge current of the electric double layer capacitor may increase. In this case, the life of the electric double layer capacitor is shortened.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an elevator control device that can extend the life of an electric double layer capacitor.

The elevator control apparatus according to the present invention includes a detecting means for detecting a charging voltage of an electric double layer capacitor that stores regenerative power of a motor used when the elevator car is traveling, and before the car starts traveling, Calculation means for calculating a travel time from the start of travel of the car to the completion of travel, and is connected between the motor and the electric double layer capacitor, and the elevator stores the regenerative power of the motor in the electric double layer capacitor. When the regenerative operation for supplying the current from the motor to the regenerative resistor is performed when the charge voltage of the electric double layer capacitor reaches the full charge voltage, when the car starts running, the charge voltage and based on said travel time, such that the voltage of the electric double layer capacitor when the running of the car is completed becomes the full charge voltage, from the motor A current controller for controlling a charging current flowing through the serial electric double layer capacitor, during regenerative operation of the elevator, when the car starts to run, based on said charging voltage and the running time, the running of the car When the charging current flowing from the motor to the electric double layer capacitor is controlled so that the voltage of the electric double layer capacitor becomes a full charge voltage when the charging is completed, the value of the charging current becomes larger than a predetermined value. Comprises speed control means for extending the travel time .
The elevator control apparatus according to the present invention includes a detecting means for detecting a charging voltage of an electric double layer capacitor that stores regenerative power of a motor used when the elevator car is traveling, and before the car starts traveling, Calculation means for calculating a travel time from the start of travel of the car to the completion of travel, and is connected between the motor and the electric double layer capacitor, and the elevator is driven by a current from a power receiving power source and the electric double layer capacitor. When the car starts running during power running, the voltage of the electric double layer capacitor becomes the lowest discharge voltage when the car is completed based on the charging voltage and the running time. A current controller for controlling a discharge current flowing from the electric double layer capacitor to the motor, and during the power running operation of the elevator, the car From the electric double layer capacitor so that the voltage of the electric double layer capacitor becomes the lowest discharge voltage when the car has finished running based on the charging voltage and the running time when starting running. When the discharge current flowing through the motor is controlled, when the value of the discharge current becomes larger than a predetermined value, speed control means for extending the travel time is provided.

  According to the present invention, the life of the electric double layer capacitor can be extended.

It is a block diagram of the elevator using the control apparatus of the elevator in Embodiment 1 of this invention. It is a figure which shows the charging voltage of the electric double layer capacitor charged by the control apparatus of the elevator in Embodiment 1 of this invention. It is a figure which shows the charging current of the electric double layer capacitor controlled by the control apparatus of the elevator in Embodiment 1 of this invention. It is a figure which shows the electrostatic capacitance of the electric double layer capacitor charged by the control apparatus of the elevator in Embodiment 1 of this invention. It is a figure which shows the charging voltage of the electric double layer capacitor charged by the control apparatus of the elevator in Embodiment 2 of this invention. It is a figure for demonstrating the charging current of the electric double layer controlled by the control apparatus of the elevator in Embodiment 2 of this invention. It is a figure which shows the charging voltage of the electric double layer capacitor discharged by the control apparatus of the elevator in Embodiment 3 of this invention. It is a figure which shows the discharge current of the electric double layer capacitor controlled by the control apparatus of the elevator in Embodiment 3 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an elevator using an elevator control device according to Embodiment 1 of the present invention.

  Reference numeral 1 denotes an elevator motor. The motor 1 is provided in an elevator machine room (not shown) or a hoistway (not shown). A sheave 2 is directly connected to the motor 1. A main rope 3 is wound around the sheave 2. A car 4 is suspended on one side of the main rope 3 in the hoistway. A weight 5 is suspended on the other side of the main rope 3 in the hoistway. The weight of the car 4 and the weight of the weight 5 are balanced.

  A control panel 6 is connected to the motor 1. The control panel 6 is provided in the machine room or the hoistway. A power receiving power source 7 is connected to the control panel 6. An electric double layer capacitor 8 is connected to the control panel 6. A regenerative resistor 9 is connected to the control panel 6.

  Next, a case where the car 4 is raised will be described. In this case, when many users are on the car 4, the elevator is in a power running operation. During power running, current is supplied to the control panel 6 from the power receiving power source 7 and the electric double layer capacitor 8. The current is supplied to the motor 1.

  On the other hand, if the user is not on the car 4, the elevator is in regenerative operation. During regenerative operation, current is supplied from the motor 1 to the control panel 6. The regenerative power corresponding to the current is stored in the electric double layer capacitor 8. When the charge voltage of the electric double layer capacitor 8 reaches the full charge voltage, the current is supplied to the regenerative resistor 9. The electric power corresponding to the current is converted into thermal energy.

  Next, a case where the car 4 is lowered will be described. In this case, when many users are on the elevator, the elevator is in a regenerative operation. During regenerative operation, current is supplied from the motor 1 to the control panel 6. The regenerative power corresponding to the current is stored in the electric double layer capacitor 8. When the charge voltage of the electric double layer capacitor 8 reaches the full charge voltage, the current is supplied to the regenerative resistor 9. The electric power corresponding to the current is converted into thermal energy.

  On the other hand, if the user is not on the car 4, the elevator is in power running. During power running, current is supplied to the control panel 6 from the power receiving power source 7 and the electric double layer capacitor 8. The current is supplied to the motor 1.

  Next, the configuration of the control panel 6 will be described more specifically. The control panel 6 includes detection means 6a, calculation means 6b, and a current controller 6c.

  The detection means 6 a has a function of detecting the charging voltage of the electric double layer capacitor 8. The calculation means 6b calculates the travel time from the start of travel of the car 4 to the completion of travel based on the distance between the current position of the car 4 and the position of the destination floor before the car 4 starts travel. It has a function. The current controller 6 c is connected between the motor 1 and the electric double layer capacitor 8. The current controller 6c controls the charging current flowing from the motor 1 to the electric double layer capacitor 8 based on the detection result of the detection means 6a and the calculation result of the calculation means 6b when the car 4 starts traveling. Is provided.

Next, a method for charging the electric double layer capacitor 8 will be described with reference to FIG.
FIG. 2 is a diagram showing a charging voltage of the electric double layer capacitor charged by the elevator control apparatus according to Embodiment 1 of the present invention. The horizontal axis in FIG. 2 represents time. The vertical axis in FIG. 2 represents the charging voltage of the electric double layer capacitor 8.

  In FIG. 2, 10 is the full charge voltage of the electric double layer capacitor 8. Reference numerals 11 and 12 denote charging voltage waveforms of the electric double layer capacitor 8. The current controller 6c of the present embodiment controls the charging current of the electric double layer capacitor 8 so that the charging of the electric double layer capacitor 8 is completed when the traveling of the car 4 is completed during the regenerative operation.

  As a result, the charging voltage waveforms 11 and 12 of the electric double layer capacitor 8 increase at a constant rate as time elapses, and reach the full charging voltage 10 when the car 4 has completed running. Specifically, when the charging voltage when the car 4 starts to travel is relatively high, the value of the charging voltage waveform 11 increases relatively gradually with the passage of time. On the other hand, when the charging voltage when the car 4 starts traveling is relatively low, the value of the charging voltage waveform 12 increases relatively rapidly as time elapses.

Next, the charging current of the electric double layer capacitor 8 will be described with reference to FIG.
FIG. 3 is a diagram showing a charging current of electric double layer capacitor 8 controlled by the elevator control device according to Embodiment 1 of the present invention. The horizontal axis in FIG. 3 represents time. The vertical axis in FIG. 3 represents the charging voltage of the electric double layer capacitor 8.

  In FIG. 3, 13 is a charging current when charging of the electric double layer capacitor 8 is completed before the traveling of the car 4 is completed. Reference numeral 14 denotes a charging current waveform corresponding to the charging voltage waveform 11 of FIG. Reference numeral 15 denotes a charging current waveform corresponding to the charging voltage waveform 12 of FIG.

  When the charging voltage when the car 4 starts traveling is relatively high, the value of the charging current waveform 14 is relatively small. On the other hand, when the charging voltage when the car 4 starts traveling is relatively low, the value of the charging current waveform 15 is relatively large. The values of the charging current waveforms 14 and 15 are smaller than the value of the charging current 13 when charging of the electric double layer capacitor 8 is completed before the traveling of the car 4 is completed.

Next, the deterioration of the capacitance of the electric double layer capacitor 8 will be described with reference to FIG.
FIG. 4 is a diagram showing the capacitance of electric double layer capacitor 8 charged by the elevator control apparatus according to Embodiment 1 of the present invention. The horizontal axis of FIG. 4 represents time. The vertical axis of FIG. 4 represents the capacitance of the electric double layer capacitor 8.

  In FIG. 4, 16 is the capacitance of the electric double layer capacitor 8 when charging is repeated with the charging current 13. Reference numeral 17 denotes the capacitance of the electric double layer capacitor 8 when charging is repeated so that the electric double layer capacitor 8 is completely charged when the car 4 has been run.

  The capacitance 16 gradually decreases according to the accumulated usage time of the electric double layer capacitor 8. When a certain time elapses, the capacitance 16 decreases rapidly. On the other hand, the capacitance 17 gradually decreases according to the accumulated usage time of the electric double layer capacitor 8. However, even after a certain period of time, the capacitance 17 decreases relatively slowly.

  According to the first embodiment described above, the charging current of electric double layer capacitor 8 is controlled so that charging of electric double layer capacitor 8 is completed when traveling of car 4 is completed. For this reason, the value of the charging current of the electric double layer capacitor 8 becomes relatively small. As a result, the self-heating of the electric double layer capacitor 8 is suppressed. That is, the charging current load on the electric double layer capacitor 8 is reduced. Thereby, the lifetime of the electric double layer capacitor 8 is extended.

Embodiment 2. FIG.
FIG. 5 is a diagram showing a charging voltage of the electric double layer capacitor charged by the elevator control apparatus according to Embodiment 2 of the present invention. FIG. 6 is a diagram showing a charging current of the electric double layer capacitor controlled by the elevator control apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  In FIG. 5, 18 and 19 are charging voltage waveforms of the electric double layer capacitor 8. Reference numeral 20 denotes an extended travel time of the car 4. In FIG. 6, 21 and 22 are charging current waveforms of the electric double layer capacitor 8.

  When the traveling time of the car 4 is short, it is necessary to increase the value of the charging voltage waveform 18 of FIG. 5 relatively rapidly with the passage of time. In this case, the value of the charging current waveform 21 in FIG. 6 needs to be relatively large. For this reason, the effect of reducing the charging current load on the electric double layer capacitor 8 is reduced.

  Therefore, the control panel 6 of the present embodiment reduces the acceleration of the car 4 as a speed control means when the value of the charging current is larger than a predetermined value. As a result, the traveling time of the car 4 is increased by the traveling extension time of 20 minutes. In this case, the value of the charging voltage waveform 19 in FIG. 5 may be increased relatively gradually as time passes. That is, the value of the charging current waveform 22 in FIG. 6 may be relatively small.

  According to the second embodiment described above, the traveling time of the car 4 is extended when the value of the charging current of the electric double layer capacitor 8 is larger than a predetermined value. For this reason, the value of the charging current of the electric double layer capacitor 8 is reliably reduced. That is, the charging current load on the electric double layer capacitor 8 is reliably reduced. This reliably extends the life of the electric double layer capacitor 8.

Embodiment 3 FIG.
FIG. 7 is a diagram showing the charging voltage of the electric double layer capacitor discharged by the elevator control apparatus according to Embodiment 3 of the present invention. FIG. 8 is a diagram showing a discharge current of the electric double layer capacitor controlled by the elevator control device according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent, and description is abbreviate | omitted.

  The control panel 6 of the first embodiment controls the charging current of the electric double layer capacitor 8. On the other hand, the control panel 6 of the third embodiment controls the discharge current of the electric double layer capacitor 8. Hereinafter, a method for controlling the discharge current by the control panel 6 according to the third embodiment will be described with reference to FIGS.

  In FIG. 7, reference numeral 23 denotes a minimum discharge voltage. 24 and 25 are charging voltage waveforms of the electric double layer capacitor 8. In FIG. 8, 26 and 27 are discharge current waveforms of the electric double layer capacitor 8. The current controller 6c of the present embodiment controls the discharge current of the electric double layer capacitor 8 so that the discharge of the electric double layer capacitor 8 is completed when the traveling of the car 4 is completed during the power running operation.

  As a result, the charging voltage waveforms 24 and 25 of the electric double layer capacitor 8 decrease at a constant rate as time elapses, and reach the minimum discharge voltage 23 when the car 4 has completed running. Specifically, when the traveling time of the car 4 is short, the value of the charging voltage waveform 24 decreases relatively rapidly with the passage of time. In this case, the value of the discharge current waveform 26 in FIG. 8 is relatively large. On the other hand, when the traveling time of the car 4 is long, it decreases relatively slowly as the charging voltage waveform 25 hours elapses. In this case, the value of the discharge current waveform 27 in FIG. 8 is relatively small.

  According to Embodiment 3 described above, the discharge current of electric double layer capacitor 8 is controlled so that the discharge of electric double layer capacitor 8 is completed when traveling of car 4 is completed. For this reason, the value of the discharge current of the electric double layer capacitor 8 is optimized. As a result, the temperature change of the electric double layer capacitor 8 is suppressed. That is, the discharge current load on the electric double layer capacitor 8 is reduced. Thereby, the lifetime of the electric double layer capacitor 8 is extended.

  When the car 4 starts running, if the electric double layer capacitor 8 is not fully charged, the discharge current can be further reduced.

  Further, when the value of the discharge current of the electric double layer capacitor 8 becomes larger than a predetermined value, the traveling time of the car 4 may be extended. In this case, the value of the discharge current of the electric double layer capacitor 8 is reliably reduced. That is, the discharge current load on the electric double layer capacitor 8 is reliably reduced. This reliably extends the life of the electric double layer capacitor 8.

DESCRIPTION OF SYMBOLS 1 Motor 2 Sheave 3 Main rope 4 Car 5 Weight 6 Control panel 6a Detection means 6b Calculation means 6c Current controller 7 Receiving power source 8 Electric double layer capacitor 9 Regenerative resistor 10 Full charge voltage 11, 12 Charge voltage waveform 13 Charge current 14 , 15 Charging current waveform 16, 17 Capacitance 18, 19 Charging voltage waveform 20 Traveling extension time 21, 22 Charging current waveform 23 Minimum discharge voltage 24, 25 Charging voltage waveform 26, 27 Discharge voltage waveform

Claims (2)

Detecting means for detecting a charging voltage of an electric double layer capacitor that stores regenerative electric power of a motor used when traveling an elevator car;
Calculating means for calculating a travel time from the start of travel of the car to completion of travel before the car starts traveling;
When the elevator is connected between the motor and the electric double layer capacitor and the elevator stores the regenerative power of the motor in the electric double layer capacitor and the charging voltage of the electric double layer capacitor reaches a full charge voltage When performing regenerative operation for supplying a current from the motor to a regenerative resistor, when the car starts running, the electric power is generated when the car has been run based on the charging voltage and the running time. A current controller for controlling a charging current flowing from the motor to the electric double layer capacitor so that the voltage of the double layer capacitor becomes a full charge voltage ;
When the car starts running during the regenerative operation of the elevator, based on the charging voltage and the running time, the voltage of the electric double layer capacitor becomes a fully charged voltage when the car has been run. As described above, when the charging current flowing from the motor to the electric double layer capacitor is controlled, when the value of the charging current is larger than a predetermined value, speed control means for extending the travel time;
An elevator control device comprising: Detecting means for detecting a charging voltage of an electric double layer capacitor that stores regenerative electric power of a motor used when traveling an elevator car;
Calculating means for calculating a travel time from the start of travel of the car to completion of travel before the car starts traveling;
The charging voltage is connected between the motor and the electric double layer capacitor and when the car starts running when the elevator performs a power running operation with a current from a power receiving power source and the electric double layer capacitor. And a current for controlling the discharge current flowing from the electric double layer capacitor to the motor so that the voltage of the electric double layer capacitor becomes the lowest discharge voltage when the car has been driven based on the travel time. A controller;
When the car starts running during the power running operation of the elevator, based on the charging voltage and the running time, the voltage of the electric double layer capacitor is set to the lowest discharge voltage when the running of the car is completed. As described above, when controlling the discharge current flowing from the electric double layer capacitor to the motor, when the value of the discharge current is larger than a predetermined value, speed control means for extending the travel time;
An elevator control device comprising:

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