JPWO2012164597A1 - Elevator control device - Google Patents

Abstract

A converter 24 that converts electric power from the AC power source 20 into DC, a capacitor 26 that smoothes the DC, and a gate drive circuit 60 that controls on / off of the switching element 31 converts the DC to an arbitrary AC, and the elevator car 9 is generated based on the inverter 30 that drives the motor 11 that operates 9, the AC power supply 20, and supplies the DC power to the gate drive circuit 60, and the gate drive circuit 60 when the AC power supply 20 is lost. A storage battery 52 that supplies power to the power supply, a voltage detection unit 80 that detects the output of the gate drive circuit 60, a determination unit 83 that determines whether or not the detected voltage value is less than or equal to a threshold value, and a gate when the detected voltage value is less than or equal to the threshold value. And a supply switch Se for supplying electric power from the storage battery 52 to the drive circuit 60.

Description

  The present invention relates to an elevator control device.

The main circuit of the elevator has a converter that converts the AC power source into DC, a capacitor that converts the pulsating voltage of the converter output into a smooth DC voltage, and converts the DC voltage into an arbitrary AC voltage with a power semiconductor element. It is equipped with an inverter that converts it. Here, it is composed of a power semiconductor element, and is generally a voltage-driven semiconductor such as an IGBT. In order to drive this semiconductor, a gate power supply that changes the gate voltage positively or negatively is required.
The malfunction of the power semiconductor element is prevented by making the gate voltage negative when the elevator is not in operation. However, when the main power supply of the elevator is turned off, the output of the gate power supply is lost. For this reason, since a negative bias cannot be applied to the gate, if the voltage of the main circuit capacitor is not discharged before this, a malfunction of the gate can cause a bus short circuit by the semiconductor element.

As shown in Patent Document 1 below, a conventional elevator control device generates an inverter that controls a motor for driving an elevator by converting a DC voltage smoothed by a capacitor into an arbitrary AC voltage, and is generated during regenerative operation of the motor. When the voltage of the capacitor is larger than the output voltage of the charging circuit in an elevator control device comprising a regenerative power consuming resistor that consumes the regenerative power via a regenerative current conducting element and a charging circuit for precharging the capacitor. A voltage comparison circuit that sends output to the voltage comparison circuit, and a charge storage capacitor that supplies accumulated charge to the voltage comparison circuit as a power source when the power is shut off, and the regenerative current conducting element is made conductive by the output of the voltage comparison circuit. ing.
According to such an elevator control device, the forced discharge of the capacitor when the power is shut off is forcibly discharged by the regenerative power processing circuit, so that the forced discharge of the capacitor is simplified.

JP-A-6-9164

However, in the above elevator control device, even if the main power is lost, the charge accumulated in the capacitor that smoothes the output voltage of the converter is reduced before the output of the control power source that controls the semiconductor elements forming the inverter or the like is lost. There is a problem that it is not guaranteed to be discharged.

The present invention has been made to solve the above-described problem. An elevator control apparatus capable of appropriately controlling a semiconductor element by supplying power to a control means for controlling the semiconductor element when a main power source is lost. The challenge is to

An elevator control apparatus according to the present invention includes a converter that converts electric power from an AC power source into DC by a semiconductor element, a capacitor that smoothes the DC, and the DC that is converted into an arbitrary AC by a switching element. An inverter that drives a motor that operates a car; a control unit that controls on / off of the switching element; a control power unit that is generated based on the AC power source and supplies a DC power source to the control unit; A storage battery that supplies power to the control power supply means when the AC power supply is lost, a first voltage detection means that detects a first voltage value that is an output of the control power supply means, and the first voltage value First determining means for determining whether or not is less than or equal to a first threshold value, and when the first voltage value is less than or equal to the first threshold value, It is obtained and a supply means for supplying.
According to the elevator control apparatus of the present invention, the first determination means determines whether or not the first voltage value of the control power supply means is equal to or lower than the first threshold value, and the supply means is equal to or lower than the first threshold value. Power from the storage battery is supplied to the control means. Therefore, even if the output voltage of the control power supply means decreases due to a power failure or the like, power supply can be continued from the storage battery to the control means, so that the switching element can be appropriately controlled by the control means.

An elevator control apparatus according to the present invention includes: a discharge unit that discharges a charge of a capacitor based on a loss of an AC power supply; a second voltage detection unit that detects a second voltage value of the capacitor; and the second voltage. And a second judging means for judging whether or not the value is higher than a second threshold, and the supply means further supplies the control means from the storage battery when the second voltage value is higher than the second threshold. It is preferable to supply electric power.
According to the control apparatus for the elevator, the supply means supplies power from the storage battery to the control means only when the second voltage value of the capacitor is larger than the second threshold value. Therefore, the supply means can supply power from the storage battery to the control means only when the current that can flow when the power supply is short-circuited by the switching element that constitutes the inverter is large, so that the storage capacity and the like can be reduced.

The control power supply means in the elevator control apparatus according to the present invention has at least first and second control power supply means, and outputs of the respective control power supply means are connected in parallel. The first control power supply means is connected to the control means. Preferably, a DC voltage is supplied, and the supply means supplies the DC voltage to the control means via the second control power supply means when the first voltage value is equal to or lower than a first threshold value. .
According to the control apparatus of the present elevator, even if the first control power supply means fails, the power can be supplied from the second control power supply means to the control means, so that the reliability against the failure of the control power supply means is improved.

In the elevator control apparatus according to the present invention, it is preferable that the output voltage of the second control power supply means be lower than the output voltage of the first control power supply means.
According to this elevator control device, when the first control power supply means is in a normal operating state, the first control power supply means only supplies power to the control means, and the second control power supply means supplies power to the control means. Do not supply. When the output voltage of the second control power supply becomes higher than the output voltage of the first control power supply means, power is supplied from the second control power supply means to the control means, so the power capacity of the second control power supply means is increased. Can be small.

The first control power supply means in the elevator control apparatus according to the present invention generates a first positive bias voltage for turning on the switching element and a first negative bias voltage for turning off the switching element. The second control power supply means preferably generates only the second negative bias voltage for turning off the switching element.
According to the control apparatus for the elevator, the negative bias voltage is generated by the first and second control power supply means. Therefore, even if the first control power supply means fails, the negative bias voltage generated from the second control power supply means. Thus, the switching element can be reliably turned off, and the second control power supply means can be simplified.

The switching element in the elevator control device according to the present invention preferably includes an upper arm and a lower arm, and the switching element of the lower arm is preferably turned off by a second negative bias voltage.
According to the elevator control apparatus, since the negative bias voltage generation of the switching element forming the lower arm of the inverter is made double, even if the first control power supply means fails, the inverter as a whole is surely turned off. And the second control power supply means can be further simplified.

The second control power supply means in the elevator control device according to the present invention is a first control power supply means for generating only one second negative bias voltage and supplying the second negative bias voltage to a plurality of lower arm switching elements. An application unit that is always connected to the output and applies the second negative bias voltage to the switching element of the other lower arm when the first determination unit determines that the first threshold value is less than or equal to the first threshold value; preferable.
As a result, the dual system is obtained, so that even if the first control power supply means fails, the switching of the lower arm can be turned off to ensure that the inverter as a whole is turned off and the second control power supply means. Since only one negative bias voltage needs to be generated, this can be further simplified.

According to the elevator control device of the present invention, when the main power supply is lost, power can be supplied to the control means for controlling the switching element such as an inverter, so that the switching means can be appropriately controlled by the control means.

1 is an overall view of an elevator according to an embodiment of the present invention. It is an internal block diagram of the gate power supply shown in FIG. It is a general view of the elevator by other embodiment of this invention. It is a general view of the elevator by other embodiment of this invention. FIG. 5 is an internal connection diagram of first and second gate power supply circuits shown in FIG. 4. FIG. 5 is an internal connection diagram of other first and second gate power supply circuits. FIG. 5 is an internal connection diagram of other first and second gate power supply circuits. FIG. 5 is an internal connection diagram of other first and second gate power supply circuits.

  9 Car, 11 Motor, 20 Three-phase AC power supply, 24 Converter, 26 Capacitor, 28 Inverter, 28a Semiconductor element, 50 Gate power supply, 52 Storage battery, 60 Gate drive circuit, 61 1st voltage detection part, 81 1st judgment Unit, 162 second voltage detection unit, 182 second determination unit, Se rescue switch.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of an elevator according to an embodiment of the present invention, and FIG. 2 is an internal configuration diagram of a gate power supply circuit shown in FIG.
In FIG. 1, the elevator has an end of the counterweight 3 connected to one end of the rope 5, the other end of the rope 5 connected to the car 9, and the rope 5 is in contact with the groove of the sheave 7 of the hoisting machine. The car 9 is moved up and down by a motor 11 that rotates the sheave 7 of the hoisting machine.

The elevator control apparatus smoothes the pulsating component by converting the three-phase AC power source 22 into a normally open main power switch S1 and a converter 24 that converts the pulsating component into direct current having a pulsating component through the normally open contact 22 of the electromagnetic switch. The circuit includes a capacitor 26 for converting to direct current and a semiconductor element 28a for converting the direct current to an arbitrary alternating voltage, and an inverter 28 for driving the motor 11. A switching element 31 made of a semiconductor of the inverter 28 is provided by a gate drive circuit 60. ON / OFF controlled. A charge / discharge circuit 35 that charges and discharges the capacitor 26 via the main power switch S <b> 1 is connected to both ends of the capacitor 26.
Similarly, a gate power supply 50 is provided as a DC power supply for the gate drive circuit 60 via the main power switch S1, and a backup storage battery 52 is connected to the gate power supply circuit 50 via the supply switch Se. Yes.
And it has the control apparatus 70 of the elevator which generates the control command signal which controls the gate drive circuit 60 and the charging / discharging circuit 35.

 In addition, the first voltage detector 61 that detects the first voltage value that is the output voltage of the gate power supply circuit 50, and whether or not the detected first voltage value is equal to or less than the first threshold value, The first determination unit 83 supplies the power from the storage battery 52 to the gate drive circuit 60 by closing the supply switch Se from the open state when the threshold value is 1 or less.

In FIG. 2, the gate power supply circuit has a diode 54 connected to one end of the supply switch Se connected to one end of the input of the DC / DC converter 58, and a main power switch S <b> 1 input to the AC / DC converter 52. It is connected to the. One end of the input of the DC / DC converter 58 and the other end of the input of the DC / DC converter 58 are connected to the output of the AC / DC converter 52 via a diode 56. In the state where the supply switch Se is closed, the gate power supply 50 is supplied with power from the power supply having the higher voltage of the AC / DC converter 52 or the storage battery 52 to the DC / DC converter 58. Is formed.

The operation of the elevator control apparatus configured as described above will be described with reference to FIGS.
<Normal time>
When the main power switch S1 is turned on and the normally open contact 22 is closed from the open state, an AC voltage is input to the gate power supply 50 and a DC voltage is supplied to the gate drive circuit 60. On the other hand, a three-phase AC power is obtained by the converter 24 and input to the inverter 30. The gate drive circuit 60 controls the inverter 30 by a command signal from the elevator control device 70 to stop or drive the motor 11.

<When power failure occurs>
The main power switch S1 and the normally open contact 22 are opened from the closed state due to a power failure, and the charge of the capacitor 26 is discharged by the charge / discharge circuit 35. On the other hand, the output voltage of the gate power supply circuit 50 decreases. The first voltage detection unit 80 detects the first voltage value as the output voltage and inputs it to the first determination unit 83. The determination unit 83 determines whether or not the first voltage value is equal to or lower than the first threshold value. Supply. Therefore, even when a power failure occurs, the gate drive circuit 60 can be normally controlled, so that the switching element 31 of the inverter 30 can also be controlled.

The elevator control apparatus according to the above embodiment includes a converter 24 that converts electric power from the three-phase AC power source 20 into direct current using a semiconductor element, a capacitor 26 that smoothes the direct current, and direct current is converted into arbitrary alternating current using a semiconductor element 28a. The inverter 30 that drives the motor 11 that operates the elevator car 9 as well as the conversion, the gate drive circuit 60 that serves as a control means for controlling the switching element 31, and the AC power supply 22, and the gate drive circuit The gate power supply circuit 50 as a control power supply means for supplying DC power to 60, the storage battery 52 for supplying power to the gate power supply circuit 50 when the AC power is lost, and the first voltage that is the output of the gate power supply circuit 50 A first voltage detector 80 for detecting a value, and a first determination for determining whether or not the first voltage value is equal to or less than a first threshold value. 83, but the first voltage value with the supply switch Se as supply means for supplying power from the battery 52 to the gate drive circuit 60 becomes below a first threshold.

According to the elevator control apparatus, the first determination unit 83 determines whether or not the first voltage value of the gate power supply circuit 50 is equal to or lower than the first threshold value. The power from the storage battery 52 is supplied to the gate drive circuit 60 by closing from the open state. Therefore, even if the output voltage of the gate power supply circuit 50 decreases due to a power failure or the like, power supply can be continued from the storage battery 52 to the gate drive circuit 60, so that the switching element 31 can be appropriately controlled by the gate drive circuit 60.

Embodiment 2.
Another embodiment of the present invention will be described with reference to FIG. FIG. 3 is an overall view of an elevator according to another embodiment of the present invention. In FIG. 3, the same reference numerals as those in FIG.
In FIG. 3, the second voltage detector 180 detects the second voltage value of the capacitor 26, and the second determination unit 183 determines that the first voltage value is less than or equal to the first threshold value and the second voltage value. Is higher than the second threshold value, the supply switch Se is closed from the open state to supply power from the storage battery 52 to the gate drive circuit 60.

The elevator control apparatus configured as described above operates in the same manner as in the first embodiment.
<When power failure occurs>
When the main power switch S1 and the normally open contact 22 are opened from the closed state due to a power failure, the charge of the capacitor 26 is discharged by the charge / discharge circuit 35. On the other hand, the output voltage of the gate power supply circuit 50 decreases. The first voltage detector 80 detects the first voltage value as the output voltage, and the second voltage detector 180 detects the voltage across the capacitor 26 and inputs it to the second determination unit 183. The second determination unit 183 determines whether or not the first voltage value is less than or equal to the first threshold, determines whether or not the second voltage value is higher than the second threshold, and determines the first voltage When the value is equal to or lower than the first threshold value and the second voltage value is higher than the second threshold value, the switch S2 is closed from the open state, and the gate drive circuit 60 is supplied with power from the storage battery 52. Thereby, even when a power failure occurs, the gate drive circuit 60 can be controlled normally, and the gate drive is performed when the voltage across the capacitor 26 is higher than the second threshold, that is, considering the magnitude of the short-circuit current. Electric power from the storage battery 52 is supplied to the circuit 60.

The elevator control device according to the above embodiment includes a charge / discharge circuit 35 that discharges the electric charge of the capacitor 26 based on the loss of the three-phase AC power supply 20, and a second voltage detection unit that detects the second voltage value of the capacitor 26. 180, and a second determination unit 183 that determines whether or not the second voltage value is higher than the second threshold value. The supply switch Se has a first voltage value equal to or lower than the first threshold value, When the voltage value of 2 is higher than the second threshold value, it is preferable to supply power from the storage battery 52 to the gate drive circuit 60.
That is, since the power from the storage battery 52 is supplied to the gate drive circuit 60 only when the voltage value of the capacitor 26 is higher than the second threshold value, the capacity of the battery 52 can be reduced.

Embodiment 3 FIG.
Another embodiment of the present invention will be described with reference to FIGS. 4 is an overall view of an elevator according to another embodiment of the present invention, and FIG. 5 is an internal connection diagram of the first and second gate power supply circuits shown in FIG. 4, the same reference numerals as those in FIG. 1 denote the same parts.
In the first and second embodiments, the number of the gate power supply circuit 50 is one. However, in the present embodiment, as shown in FIG. 4, the first power supply circuit 150 and the second gate power supply circuit 250 are provided. Therefore, the gate power supply circuits 150 and 250 are a dual system. The inverter 30 includes an upper arm 32 and a lower arm 34 each including a switching element 31. The upper arm 32 includes switching elements 31uu, 32uv, 31uw, and the lower arm 34 includes a switching element 31du, 31 dv, 31 dw.
The voltage monitoring unit 200 detects the output voltage values of the first and second gate power supply circuits 150 and 250, and shuts off the gate driving circuit 60 when the two output voltage values fall below a predetermined threshold value. It is formed so as to generate an interruption signal.

In FIG. 5, the first and second gate power supply circuits 150 and 250 are flyback type, and have six power supply output units for driving the six switching elements 31 of the inverter 30. The first gate power supply circuit 150 applies a voltage from the three-phase AC power supply to the capacitor 154 through the three-phase full-wave bridge 152. A primary winding of the transformer 158 and a switching semiconductor element 156 are connected to both ends of the capacitor 154. Each first power supply output unit generates a positive bias voltage for turning on the switching elements 31 of the upper arm 32 and the lower arm 34, and generates a negative bias voltage for turning off the switching elements 31. There are 12 windings with two windings as a pair.

In the first power output unit, one end of a secondary winding of the transformer 158 is connected to one end of a diode D11 (D12 to D16), and the other end is connected to one end of a diode D21 (D22 to D26). One end of each of the two smoothing capacitors C11 (C12 to C16) and C21 (C22 to C26) is connected from the center point of the secondary winding. The other end of the smoothing capacitor C11 (C12 to C16) is connected to the other end of the diode D11 (D12 to D16), and the other end of C21 (C22 to C26) is connected to the diode D21 (D22 to D26). ing.

The second gate power supply circuit 250 applies a voltage from the battery 52 to the capacitor 254. The primary winding of the transformer 158 and the switching semiconductor element 256 are connected to both ends of the capacitor 254. Each power supply output unit generates a positive bias voltage for turning on the switching element 31 constituting the inverter 30 and a pair of two windings 12 for generating a negative bias voltage for turning off the switching element 31. Has windings.
In the second power supply output unit, one end of the secondary winding of the transformer 258 is connected to one end of a diode D31 (D32 to D36), and the other end of the diode D41 (D42 to D46). One end is connected, and one end of each of the two smoothing capacitors C31 (C32 to C36) and C41 (C42 to C46) is connected from the center point of the secondary winding. The other end of the smoothing capacitor C31 (C32 to C36) is connected to the other end of the diode D31 (D32 to D36), and the other end of the capacitor C41 (C42 to C46) is connected to the diode D41 (D42 to D46). Has been.
The output of the second power output unit is always connected in parallel to the first power output unit.

The positive bias voltage of the first gate power supply circuit 150 is V1-1, the negative bias voltage is V2-1, the positive bias voltage of the second gate power supply circuit 250 is V1-2, and the negative bias voltage is V2. In the case of -2, the absolute value of each output voltage has the following relationship.
| V1-1 |> | V1-2 |, | V2-1 |> | V2-2 |
By having such a relationship, in a normal state where the first gate power supply circuit 150 has not failed, the output current of the second gate power supply circuit 250 does not flow.

The operation of the elevator control apparatus configured as described above will be described with reference to FIGS.
<Normal time>
When the main power switch S <b> 1 is turned on and the normally open contact 22 is closed from the open state, an AC voltage is input to the first gate power supply circuit 150 and a DC voltage is supplied to the gate drive circuit 60. On the other hand, a three-phase AC power is obtained by the converter 24 and input to the inverter 30. The first gate drive circuit 150 controls the inverter 30 by a command signal from the control device 70 to stop or drive the motor 11.
<In case of abnormality>
If the voltage of the first gate power supply circuit 150 is lower than the output voltage of the second gate power supply circuit 250 for some reason, the output of the second gate power supply circuit 250 causes the switching element 31 constituting the inverter 30 to Input a gate signal. Therefore, even if the first gate power supply circuit 150 fails, the inverter 30 can be driven from the second gate power supply circuit 250 via the gate drive circuit 60.
Moreover, since the storage battery 52 is used as an input source when a power failure occurs, the inverter 30 can be driven from the second gate power supply circuit 250 via the gate drive circuit 60.

Embodiment 4 FIG.
In the third embodiment, as shown in FIG. 5, in order to make the gate power supply circuit a dual system, both the first gate power supply circuit 150 and the second gate power supply circuit 250 have a positive bias voltage and a negative bias voltage. In the present embodiment, as shown in FIG. 6, the second gate power supply circuit 1250 is formed so as to generate only the negative bias voltage without generating the positive bias voltage. Each negative bias voltage that is an output of the power supply output unit is always connected in parallel with each negative bias voltage of the corresponding first power supply output unit.
According to the elevator control device having such a configuration, a double system of negative bias voltage is secured. Thereby, even if the negative bias voltage of the first gate power supply circuit 150 cannot be generated, the negative bias voltage can be applied from the second gate power supply circuit 1250 to the switching element 31 of the inverter 30, so that the switching element 31 can be securely connected. Can be turned off.
Thus, this embodiment can be simplified because the second gate power supply circuit 1250 can omit the generation of the positive bias voltage as compared with the third embodiment.

Embodiment 5 FIG.
In the fourth embodiment, as shown in FIG. 6, only the negative bias voltage side of the gate power supply circuit is a dual system, but in this embodiment, the second gate power supply circuit 2250 is an inverter as shown in FIG. Only three negative bias voltages of the switching element 31 applied to the lower arm 34 are generated. Three negative bias voltages serving as outputs of the second power output unit are always connected in parallel to the corresponding negative bias voltages of the first power output unit.
According to the elevator control device having such a configuration, the double system of the negative bias voltage related to the switching element 31 applied to the lower arm 34 of the inverter 30 is secured, so the corresponding negative voltage of the first gate power supply circuit 150 is secured. Even if the bias voltage generation unit fails, the corresponding negative bias voltage can be applied from the second gate power supply circuit 2250 to the switching element 31 of the lower arm 34, so that malfunction of the switching element 31 can be prevented.
Thereby, compared with the fourth embodiment, this embodiment can eliminate the generation of the three negative bias voltages of the switching element 31 applied to the upper arm 32 of the inverter 30, and thus the configuration of the second gate power supply circuit 2250. Can be simplified.

Embodiment 6 FIG.
In the fifth embodiment, as shown in FIG. 7, the second gate power supply circuit 2250 generates only three negative bias voltages of the switching element 31 applied to the lower arm 34 of the inverter 30, and the second power supply output section The three negative bias voltages to be output are always connected in parallel to the corresponding negative bias voltages of the corresponding first power supply output unit. In the present embodiment, as shown in FIG. 3250 is formed so as to generate only one negative bias voltage corresponding to the switching element 31 of the lower arm 34 of the inverter 30, and the negative bias voltage of the first gate power supply circuit 150 to which the negative bias voltage corresponds. Always connected to the voltage output.
And it is connected to the output of the other negative bias voltage input into the two switching elements 31 of the lower arm 34 which comprises the inverter 30 via switch S1-S4.

According to the elevator control apparatus having such a configuration, when the corresponding negative bias voltage generator of the first gate power supply circuit 150 detects a failure, the switches S1 to S4 are turned on to turn on the second gate power supply circuit 3250. Since the corresponding negative bias voltage can be applied to the switching element 31 of the lower arm 34, malfunction of the switching element 31 can be prevented.
Thereby, compared with the fifth embodiment, this embodiment can eliminate the generation of the two negative bias voltages of the switching element 31 applied to the lower arm 34 of the inverter 30, and therefore the configuration of the second gate power supply circuit Can be simplified.

Moreover, although the switching element 31 which comprises the inverter 30 shown in the said Embodiment 1-6 may be silicon, it is preferable to form with the wide band gap semiconductor with a large band gap compared with silicon. Examples of the wide band gap semiconductor include silicon carbide, a gallium nitride-based material, and diamond.
Since the switching element 31 formed of such a wide band gap semiconductor has a high voltage resistance and a high allowable current density, the switching element 31 can be reduced in size, and the reduced switching element 31 is used. As a result, an inverter incorporating these elements can be miniaturized.
Furthermore, even if the switching element 31 forming the inverter 30 in the first to sixth embodiments is formed of a wide bandgap semiconductor, or the AC power supply is lost, the switching element 31 can be appropriately controlled.

The present invention can be applied to an elevator control device.

Claims (8)

A converter that converts power from an AC power source into DC by a semiconductor element;
A capacitor for smoothing the direct current;
An inverter that drives the motor that operates the elevator car, while converting the direct current into arbitrary alternating current by a switching element;
Control means for on / off control of the switching element;
Control power supply means that is generated based on the AC power supply and supplies DC power to the control means;
A storage battery for supplying power to the control power means when the AC power is lost;
First voltage detection means for detecting a first voltage value which is an output of the control power supply means;
First determination means for determining whether or not the first voltage value is equal to or lower than a first threshold;
Supply means for supplying power from the storage battery to the control means when the first voltage value is equal to or lower than a first threshold;
An elevator control device comprising: Discharging means for discharging the charge of the capacitor based on the loss of the AC power supply;
Second voltage detecting means for detecting a second voltage value of the capacitor;
Second determination means for determining whether or not the second voltage value is higher than a second threshold;
The supply means supplies power from the storage battery to the control means when the second voltage value is higher than a second threshold value.
The elevator control device according to claim 1. The control power supply means has at least first and second control power supply means, and outputs thereof are connected in parallel, and the first control power supply means supplies a DC voltage to the control means. ,
The supply means supplies the DC power to the control means via the second control power supply means when the first voltage value is equal to or lower than a first threshold value.
The elevator control device according to claim 1 or 2. The output voltage of the second control power supply means is lower than the output voltage of the first control power supply means;
The elevator control device according to claim 1 or 2. The first control power supply means generates a first positive bias voltage for turning on the switching element and a first negative bias voltage for turning off the switching element,
The second control power supply means generates only a second negative bias voltage for turning off the switching element;
The elevator control device according to claim 4. The switching element includes an upper arm and a lower arm,
Turning off the switching element of the lower arm by the second negative bias voltage;
The elevator control device according to claim 5. The second control power supply means generates only one second negative bias voltage and is always connected to the outputs of the first control power supply means for supplying the switching elements of the lower arms. Has been
When the first determining means determines that the first threshold value is less than or equal to the first threshold value, the applying means for applying the second negative bias voltage to the switching element of the other lower arm,
The elevator control device according to claim 5, further comprising an elevator control device. The switching element is formed of a wide band gap semiconductor.
The elevator control device according to any one of claims 1 to 7.

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