JP2001251702A - Electric car control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric car control device that is advantageous in manufacturing maintenance, and further in space. SOLUTION: Inverter-control devices 11A-11C all have the same configuration, and inverter controls 13A-13C are provided with variable voltage/variable frequency control means and a constant-voltage/constant-frequency control means inside. During normal operation, inverters 8A and 8B supply AC power to induction motors IM1, IM2, IM3, and IM4 by VVVF control, and an inverter 8C supplies AC power to a load 10 by CVCF control. When the inverter 8C fails, an inverter control 13B switches from the VVVF up to that point control to CVCF control, and the inverter 8B supplies power to the load 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of supplying AC power controlled by a plurality of main power converters with a variable voltage and a variable frequency to an AC motor for driving an electric vehicle, and controlling a constant voltage and a constant frequency by an auxiliary power converter. The present invention relates to an electric vehicle control device that supplies the obtained AC power to electric vehicle auxiliary devices.

[0002]

2. Description of the Related Art FIG. 6 is a circuit diagram showing a configuration of a conventional electric vehicle control device. In this figure, DC power from an overhead line 1 is collected by a pantograph 2. The inverter 8A as a main power converter is connected to the pantograph 2 via a unit switch 4a, a unit switch 4b, and a filter reactor 6a to which a high-speed circuit breaker 3a, a charging resistor 5a are connected in parallel, and a unit. From a connection point of the switches 4a and 4b, an inverter 8B as a main power converter is connected via a unit switch 4c and a filter reactor 6b. Pantograph 2
An inverter 8C, which is an auxiliary power converter, is connected via a high-speed circuit breaker 3b, a unit switch 4d to which a charging resistor 5b is connected in parallel, a filter reactor 6c, and a switching unit switch 7b. A switching unit switch 7a is provided between the other end of the filter reactor 6b and a connection point between the filter reactor 6c and the switching unit switch 7b.

The output side of the inverter 8A is connected to induction motors IM1 and IM2 for driving the electric vehicle, and the output side of the inverter 8B is connected to the induction motors IM3 and IM3 for driving the electric vehicle via the switching unit switch 7c. IM4 is connected. A load 10 of an electric vehicle auxiliary device or the like (an air conditioner, a lighting device, or the like) is connected to an output side of the inverter 8C via a switching unit switch 7e and a transformer 9. A switching unit switch 7d is connected between the output terminal of the inverter 8B and the primary side of the transformer 9.

The control of the inverters 8A, 8B, 8C is performed by inverter control devices 51A, 51B, 51, respectively.
C is to do this. Inverter control device 51A
Has a VVVF control unit 52A and a PWM control unit 53A. The VVVF control unit 52A outputs the torque command T1 *,
The VVVF control (variable voltage variable frequency control) is performed based on the input of the motor current I1, the rotor frequency fr1, and the filter capacitor voltage V1, and the PWM control unit 53A
The PWM control is performed based on the input from the VF control unit 52A, and the gate signal G1 is output to the inverter 8A.

The inverter control unit 51B includes a VVVF control unit 52B and a PWM control unit 53B1, a CVCF control unit 54B and a PWM control unit 53B2, and these two P
And a control switch 55 for switching the output from the WM control units 53B1 and 53B2. The control switch 55 outputs a gate signal G2 to the inverter 8B. The VVVF control unit 52B performs VVVF control based on the input of the torque command T2 *, the motor current I2, the rotor frequency fr2, and the filter capacitor voltage V2, while the CVCF control unit 54B controls the filter capacitor voltage V2 and the output. CVCF control (constant voltage / constant frequency control) is performed based on the input of the voltage VO and the output voltage command VO *. The control switch 55 switches between the outputs of the two PWM control units 53B1 and 53B2 based on a VVVF command or a CVCF command from the outside.

[0006] The inverter control unit 51C has a CVCF control unit 54C and a PWM control unit 53C. CV
The CF control unit 54C determines the C based on the input of the filter capacitor voltage V3, the output voltage VO, and the output voltage command VO *.
The VCF control is performed, and the PWM control unit 53C performs the PWM control based on the input from the CVCF control unit 54C, and outputs the gate signal G3 to the inverter 8C.

The inverters 8A and 8B controlled by VVVF and the inverter 8C controlled by CVCF as described above use self-extinguishing type semiconductor elements such as GTO thyristors and IGBTs. A bridge circuit is configured, and the conduction / non-conduction state is controlled at an arbitrary timing to convert DC power to AC power.

Next, the operation of FIG. 6 will be described. In a normal operation state, the high-speed circuit breakers 3a and 3b, the unit switches 4a to 4d, and the switching unit switches 7b, 7c, and 7e are on, and the switching unit switches 7a and 7d are off. Accordingly, the inverter 8A supplies AC power controlled by variable voltage and variable frequency to the induction motors IM1 and IM2, the inverter 8B supplies the AC power to the induction motors IM3 and IM4, and the inverter 8C supplies constant current to the load 10. It supplies AC power that is voltage-constant frequency controlled. Then, the inverter control devices 51A, 51
B and 51C output gate signals G1 to G3 to the inverters 8A, 8B and 8C, respectively. At this time,
In the inverter control device 51B, VV is applied to the control switch 55.
The VF command is input, and the output signal from the PWM control unit 53B1 is output to the inverter 8B as the gate signal G2.

Assuming that an abnormality (for example, burning of a switching element) occurs in the inverter 8C during the normal operation as described above, and this abnormality is detected,
The output of the gate signal G3 from the inverter control device 51C is stopped, and the switching unit switches 7b and 7e are turned off, so that the operation of the inverter 8C is stopped.

When the operation of the inverter 8C is stopped, the power supply to the load 10 such as the air conditioner and the lighting device is cut off. In such a state, the service to the passengers cannot be performed, and the commercial operation is continued. become unable. Then, the unit switch 4c is turned off and the switching unit switch 7a is turned on, and the input path of the inverter 8B is switched to the input path of the inverter 8C up to that point. Further, the switching unit switch 7C is turned off, the switching unit switch 7d is turned on, and the induction motors IM3, IM4
From the inverter 8B supplied to the load 10
Can be switched.

At this time, the VVVF command input to the control switch 55 is switched to the CVCF command.
The VVVF control unit 52B and the PWM control unit 53B1 stop operating, and the CVCF control unit 54B and the PWM control unit 53B2 start operating. Then, the output signal from the PWM control unit 53B2 is output to the inverter 8B as the gate signal G2.

Here, when the inverter control device 51B has VV
In addition to the VVVF control unit 52B and the PWM control unit 53B1 as a VF control system, a CVCF as a CVCF control system
The reason for having the control unit 54B and the PWM control unit 53B2 is as follows. That is, if the voltage and the frequency are fixed, the CVC can be performed by the VVVF control unit 52B.
Although it is possible to perform the F control, the load 10 in the electric vehicle includes various devices such as a fluorescent lamp and a compressor having a torque ripple, and the load 10 is not necessarily turned on or off or disturbed by these devices. Stable and quick control cannot be expected. Therefore, a CVCF control system is separately provided as a backup for the load 10 and a dedicated voltage control is performed to ensure stable and quick control of the load 10 of the electric vehicle. .

[0013]

As described above, the load 10 whose power supply has been cut off due to the failure of the inverter 8C is now supplied with AC power controlled at a constant voltage and constant frequency from the inverter 8B. And the operation can be started again.

However, the configuration of the conventional device is such that the inverter control device 51A dedicated to VVVF control, VVVF and CVC
The configuration uses a total of three types of inverter control devices, an inverter control device 51B capable of controlling both F and an inverter control device 51C dedicated to CVCF control. For this reason, three types of spare parts are required even when considering spare parts at the time of failure, which is disadvantageous in terms of manufacturing and maintenance.

In addition, the inverter controller 51B must be equipped with a device for both the VVVF control system and the CVCF control system, and a control switch 55 for switching between these devices, so that the size of the inverter control device 51B is inevitably increased. And
It was disadvantageous in terms of space.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric vehicle control device which is advantageous in terms of manufacturing, maintenance, and space.

[0017]

As means for solving the above problems, the invention according to claim 1 converts DC power from an overhead line into AC power, and converts the AC power into an AC motor for driving an electric vehicle. A plurality of main power converters for outputting, a plurality of main power converter control devices for controlling the AC power output from the main power converter with a variable voltage and a variable frequency, and converting DC power from overhead lines to AC power An auxiliary power converter that outputs the same to an electric vehicle auxiliary device; and an auxiliary power converter controller that controls the AC power output from the auxiliary power converter at a constant voltage and a constant frequency. When the converter fails, any one of the main power converters set in advance among the plurality of main power converters in place of the auxiliary power converter converts the AC power controlled by the constant voltage and the constant frequency to the power. Output to electric vehicle auxiliary equipment That, in the electric vehicle control device, the main power converter control apparatus and the auxiliary power converter controller,
Each of them has both variable voltage variable frequency control means and constant voltage constant frequency control means.

According to a second aspect of the present invention, in the first aspect of the invention, the main power converter and the main power converter control device form a main power conversion unit, and the auxiliary power converter and the auxiliary power converter. An auxiliary power conversion unit is formed by the power converter control device, and the main power conversion unit and the auxiliary power conversion unit have the same configuration.

According to a third aspect of the present invention, in the first or second aspect of the invention, there is provided an operation mode switching instruction circuit for outputting either a normal operation mode signal or an abnormal operation mode signal based on an external command. A main power converter control device for controlling any one of the main power converters set in advance, and an auxiliary power converter control device, the input of a signal from the operation mode switching command circuit and a predetermined logical condition And a control command output unit for outputting either the variable voltage variable frequency control command or the constant voltage constant frequency control command to the variable voltage variable frequency control means and the constant voltage constant frequency control means based on It is characterized by.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. However, the same components as those in FIG. 6 are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 is a configuration diagram of the first embodiment. In this figure, the inverter 8
A to 8C are controlled by inverter control devices 11A to 11C having the same configuration as each other.
Inverter control device 11A for controlling inverter 8A
Is a control command output unit 12A, an inverter control unit 13A,
And a PWM control unit 14A. The control command output unit 12A outputs a VVVF control command to the inverter control unit 13A when the command signal of the “inverter 1” is input, whereby the inverter control unit 13A receives the torque command T1 *, the motor current I1, and the rotor frequency. VVVF control is performed based on the input of fr1 and the filter capacitor voltage V1.

The inverter control section 13B for controlling the inverter 8B has a control command output section 12B, an inverter control section 13B, and a PWM control section 14B. Then, the control command output unit 12B receives the command signal of the “inverter 2” and receives the command signal of “VVVF” or “CVCF”, and receives the VVVF control command or CVCF.
A VCF control command is output to the inverter control unit 13A. The control command output unit 12B outputs a VVVF control command based on the input of the "VVVF" command signal during normal operation. Therefore, the inverter control unit 13B outputs the torque command T2 * and the motor current I during normal operation.
2, rotor frequency fr2 and filter capacitor voltage V2
VVVF control is performed based on the input of.

The inverter control device 11C for controlling the inverter 8C has a control command output unit 12C, an inverter control unit 13C, and a PWM control unit 14C. When the command signal of “inverter 3” is input, the control command output unit 12C outputs a CVCF control command to the inverter control unit 13C, whereby the inverter control unit 13C
Performs CVCF control based on the input of the filter capacitor voltage V3, the output voltage VO, and the output voltage command VO *.

FIG. 2 shows the inverter control unit 1 shown in FIG.
FIG. 3B is a block diagram showing a configuration of a variable voltage variable frequency control means 15 and a constant voltage / constant frequency control means 18 included in 3B. FIG. 2 illustrates the inverter control device 11B as a representative example.
A and 11C have the same configuration.

The inverter control section 13B has a storage means therein, and holds the variable voltage variable frequency control means 15 and the constant voltage / constant frequency control means 18 in the storage means. Then, either the variable voltage / variable frequency control means 15 or the constant voltage / constant frequency control means 18 can be installed in the control processing unit as needed.

As shown in FIG. 2, the variable voltage variable frequency control means 15 has a current control circuit 16 and a VVVF control circuit 17. The current control circuit 16 outputs a current control signal based on the input of the torque command T2 * and the motor current I2, and the VVVF control circuit 17 outputs the current control signal based on the input of the rotor frequency fr2 and the filter capacitor voltage V2. Output a VVVF control signal.

The constant voltage / constant frequency control means 18 has a voltage control circuit 19 and a CVCF control circuit 20.
The voltage control circuit 19 outputs the output voltage command VO * and the output voltage V
A voltage control signal is output based on the input of O, and the CVCF control circuit 20 outputs a CVCF control signal based on the input of the voltage control signal and the filter capacitor voltage V3.

Next, the operation of the first embodiment configured as described above will be described. As described in the conventional device of FIG. 6, in the normal operation state, the high-speed circuit breaker 3
a, 3b, the unit switches 4a to 4d, and the switching unit switches 7b, 7c, 7e are on, and the switching unit switches 7a, 7d are off. Therefore, the inverter 8A provides the induction motors IM1 and IM2 with:
The inverter 8B supplies AC power controlled by variable voltage and variable frequency to the induction motors IM3 and IM4, respectively.
Further, the inverter 8C supplies the load 10 with AC power that is controlled at a constant voltage and a constant frequency. The inverter control devices 11A, 11B, and 11C output gate signals G1 to G3 to the inverters 8A, 8B, and 8C, respectively. At this time, in the inverter control device 11B, the "inverter 2" and the "VV
A command signal “VF” is input, and a VVVF control command is output to the inverter control unit 13B. Therefore, in the inverter control unit 13B, the variable voltage variable frequency control means 15 shown in FIG. 2 receives the torque command T2 *, the motor current I2, the rotor frequency fr2, and the filter capacitor voltage V2, and performs VVVF control. The gate signal G2 based on the VVVF control is supplied to the inverter 8B.
Output to

Assuming that an abnormality (for example, burning of the switching element) occurs in the inverter 8C during the normal operation as described above, and this abnormality is detected,
The output of the gate signal G3 from the inverter control device 11C is stopped, and the switching unit switches 7b and 7e are turned off, so that the operation of the inverter 8C is stopped.

Next, the unit switch 4c is turned off and the switching unit switch 7a is turned on, and the input path of the inverter 8B is switched to the input path of the inverter 8C. Further, the switching unit switch 7C is turned off, the switching unit switch 7d is turned on, and the induction motor IM
3. Power from the inverter 8B supplied to the IM4 is switched to the load 10. At this time, the “VVV” which has been input to the control command output unit 12B until then.
The command signal "F" is switched to the CVCF command. As a result, in the control command output unit 12B, the operation of the variable voltage variable frequency control unit 15 up to that point is terminated, and the constant voltage constant frequency control unit 18 is installed this time. And
The voltage control circuit 19 of the constant voltage / constant frequency control means 18 outputs a voltage control signal based on the input of the output voltage command VO * and the output voltage VO, and the CVCF control circuit 20 outputs the voltage control signal and the filter capacitor voltage V3. The CVCF control signal is output to the PWM control unit 14B based on the input.
The PWM control unit 14B performs PWM control based on the CVCF control signal, and outputs a gate signal G2 to the inverter 8B. Accordingly, the load 10 whose power supply has been cut off due to the failure of the inverter 8C now receives the supply of AC power controlled at a constant voltage and a constant frequency from the inverter 8B, and can start operating again.
In the case of the CVCF control, since the control target is various auxiliary devices, and a high-speed response of the control is required, the control sampling time can be changed to half or less of that in the case of the VVVF control. ing.

The inverter control devices 11A to 11C in the configuration shown in FIG. 1 have the same configuration. That is, while the conventional device of FIG. 6 has a configuration using three types of inverter control devices, FIG. 1 shows a configuration using only one type of inverter control device. Therefore, since only one type of inverter control device needs to be targeted at the time of manufacturing and maintenance, it is very advantageous in terms of manufacturing and maintenance. In the conventional device, the inverter control device 51
Since only the inverter control device 51B protruded and was large compared to A and 51B, space conditions were limited and the degree of freedom in design had to be reduced. However, in the configuration of FIG. Apparatus 11A ~
Since all 11Cs have the same size, the degree of freedom in design is greatly increased.

FIG. 3 is a configuration diagram of a second embodiment of the present invention. However, for simplification of the drawing, illustration of the high-speed circuit breakers 3a and 3b, unit switches 4a to 4d, charging resistors 5a and 5b, filter reactors 6a to 6c, and the like in FIG. 1 are omitted. In FIG. 3, the inverter unit 2
1A includes an inverter 8A and an inverter control device 11A. Similarly, the inverter unit 21
B comprises an inverter 8B and an inverter control device 11B, and the inverter unit 21C
C and an inverter control device 11C. Further, changeover switches 22a and 22c are provided on the input side and the output side of the inverter 8B, respectively.
Changeover switches 22b and 22d are provided on the input side and output side of the inverter 8C, respectively.

As described above, by combining the inverter and the inverter control device and integrating them as an inverter unit, it is possible to clarify the redundant part of the system and to change the type of equipment managed by the customer. ,
From the two types of the conventional inverter and the inverter control device, one type can be used. Furthermore, by integrating the inverter, that is, the main circuit section and the inverter control device, even in the event of a failure, it is possible to easily estimate the location of the failure, thus shortening the preparation and recovery time for the failure. Will be able to

FIG. 4 shows the control command output unit 12 in the inverter control devices 11A, 11B, 11C in FIG.
It is explanatory drawing about the correspondence of the input signal of A, 12B, and 12C, and an output signal. "SU" of the control command output unit 12A
1 "and" VVVF mode ", a logical signal is input to the input terminal.
Indicates that a logic signal is input to both terminals and "CVCF
A VVVF command is output to the inverter control unit 13A on the condition that no logic signal is input to the input terminal of the "mode".

The control command output unit 12B outputs VVVF
In the mode, “SU1” and “VVVF mode”
A logic signal is input to the input terminal of
The control command output unit 12B provides the inverter control unit 13B with a condition that a logical signal is input to both terminals and a logical signal is not input to the input terminal of the “CVCF mode”.
Output a VVVF command. And
In the CVCF mode, “SU2” and “CVC
A logical signal is input to the input terminal of “F”, and the control command output unit 12B receives a logical signal at both terminals and does not input a logical signal to the input terminal of “VVVF mode”. Inverter control unit 1 on condition that
The CVCF command is output to 3B.

Further, "SU2" of the control command output section 12C
And a logical signal is input to the input terminal of the “CVCF mode”, and the control command output unit 12C receives the logical signal at both terminals and outputs the logical signal to the input terminal of the “VVVF mode”. A CVCF command is output to the inverter control unit 13C on the condition that it has not been input.

The switching command section 23 outputs a logic signal to the "VVVF mode" input terminal of the control command output section 12B during normal operation, and outputs a logic signal to the "CVCF mode" input terminal at the time of switching, that is, abnormally. Is what you do. The switching command unit 23 outputs a logic signal to the “CVCF mode” input terminal of the control command output unit 12C during normal operation, and stops outputting this logic signal during switching. The switching command section 23 is provided in either the inverter unit 21B or 21C in FIG. Then, the changeover switch 22 in FIG.
a to 22d operate according to the output state of the switching command unit 23.

FIG. 5 shows the inverter unit 21 described above.
5 is a table in which the relationship between each input condition of A, 21B, and 21C and each activation condition is arranged and shown.

Next, the second embodiment of the present invention shown in FIGS.
The operation of the embodiment will be described. In a normal operation state, the contact positions of the change-over switches 22a to 22d in FIG. 3 are in the illustrated state, the AC power from the inverter 8B is supplied to the induction motors IM3 and IM4, and the AC power from the inverter 8C is Are supplied to a load 10 via a transformer 9. At this time, a logic signal is input to the “SU1” input terminal of the control command output unit 12B in FIG. The switching contact position of the switching command unit 23 is a normal “V” position. The switching command unit 23 outputs a logic signal to a “VVVF mode” input terminal of the control command output unit 12B, and outputs a control command. Output unit 12C
Is output to the "CVCF mode" input terminal. Therefore, the control command output unit 12B outputs a VVVF command to the inverter control unit 13B, and the control command output unit 12C outputs a CVV command to the inverter control unit 13C.
It is in the state of outputting the CF command.

While the normal operation is being performed,
If an abnormality occurs in the inverter 8C and this abnormality is detected, the switching contact position of the switching command unit 23 switches from the normal “V” position to the “S” position at the time of switching, and the switching command unit 23 The logic signal is output to the “CVCF mode” input terminal of the control command output unit 12B, and the output of the logic signal that has been output to the “CVCF mode” input terminal of the control command output unit 12C is stopped. Therefore, the control command output unit 12B is connected to the inverter control unit 13
B outputs a CVCF command to the control command output unit 12
C is in a state of not outputting any command to the inverter control unit 13C.

At this time, the contact of the changeover switch 22a in FIG. 3 switches from a side to b side, and the contact of the changeover switch 22b switches from b side to a side. That is, DC power is input to inverter 8B through the same path as inverter 8C. And the changeover switch 22
The contact of c also switches from the a side to the b side, and the contact of the changeover switch 22d also switches from the b side to the a side. Therefore, the AC power from the inverter 8B is supplied to the load 10 via the transformer 9.

As shown in the table of FIG. 5, the starting conditions of each unit include the condition that a logical signal is input to both the unit recognition code input terminal and the control mode input terminal and the other condition. Weighting the condition that a logic signal is not input to the input terminal of the control mode VVVF
An interlock between the mode and the CVCF mode is taken. Therefore, the control command output units 12A to 12A
Even if an accident such as disconnection occurs in the signal line on the input side of C, erroneous starting operation can be prevented, and safety can be improved.

[0042]

As described above, according to the present invention, both the main power converter control device and the auxiliary power converter control device have both variable voltage variable frequency control means and constant voltage constant frequency control means. With this configuration, an electric vehicle control device that is advantageous in terms of manufacturing, maintenance, and space can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a variable voltage variable frequency control means 15 and a constant voltage / constant frequency control means 18 included in an inverter control unit 13B in FIG. 1;

FIG. 3 is a configuration diagram of a second embodiment of the present invention.

FIG. 4 shows inverter control devices 11A and 11 in FIG.
B, 11C, the control command output units 12A, 12B,
FIG. 9 is an explanatory diagram of a correspondence relationship between an input signal and an output signal of 12C.

FIG. 5 shows inverter units 21A and 21 shown in FIG.
13 is a table in which the relationship between each input condition of B and 21C and each activation condition is arranged and shown.

FIG. 6 is a circuit diagram showing a configuration of a conventional electric vehicle control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Overhead wire 2 Pantograph 3a, 3b High-speed circuit breaker 4a-4d Unit switch 5a, 5b Charging resistance 6a-6c Filter reactor 7a-7e Switching unit switch 8A, 8B Inverter (main power converter) 8C Inverter (auxiliary power converter) 9) Transformer 10 Load 11A, 11B Inverter control device (main power converter control device) 11C Inverter control device (auxiliary power converter control device) 12A to 12C Control command output unit 13A to 13C Inverter control unit 14A to 14C PWM control unit Reference Signs List 15 variable voltage variable frequency control means 16 current control circuit 17 VVVF control circuit 18 constant voltage constant frequency control means 19 voltage control circuit 20 CVCF control circuit 21A, 21B inverter unit (main power conversion unit) 21C (auxiliary power conversion unit) 22a- 2d changeover switch 23 changeover command section IM1 to IM4 Induction motor (AC motor for driving electric vehicle) T1 *, T2 * Torque command I1, I2 Motor current fr1, fr2 Rotor frequency V1 to V3 Filter capacitor voltage VO Output voltage VO * Output Voltage command

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) GG04 GG05 GG07 HB01 JJ02 JJ17 LL01 LL22 LL24 LL55 MM06 MM11

Claims (3)

[Claims] 1. A plurality of main power converters for converting DC power from an overhead line into AC power and outputting the AC power to an AC motor for driving an electric vehicle, and AC power output from the main power converter. A plurality of main power converter controllers for controlling the variable voltage and the variable frequency; an auxiliary power converter for converting DC power from the overhead wire to AC power and outputting this to an electric vehicle auxiliary device; and An auxiliary power converter control device that controls the AC power output from the converter at a constant voltage and a constant frequency, and when the auxiliary power converter fails, the plurality of main powers are replaced in place of the auxiliary power converter. Any of the preset main power converters among the converters outputs constant-voltage / constant-frequency controlled AC power to the electric vehicle auxiliary device, in the electric vehicle control device, wherein the main power converter control device and Auxiliary power conversion Controller are all those having both a variable voltage variable frequency control means and a constant-voltage constant-frequency control means, the electric motor car control apparatus characterized by. 2. A main power conversion unit is formed by the main power converter and the main power converter control device, and an auxiliary power conversion unit is formed by the auxiliary power converter and the auxiliary power converter control device. The electric vehicle control device according to claim 1, wherein the main power conversion unit and the auxiliary power conversion unit have the same configuration. 3. An operation mode switching command circuit for outputting one of a normal operation mode signal and an abnormal operation mode signal based on a command from the outside, and controlling one of the preset main power converters. The main power converter control device and the auxiliary power converter control device perform a variable voltage variable frequency control command or a constant voltage constant frequency based on a signal from the operation mode switching command circuit and an input of a predetermined logical condition. The electric vehicle control device according to claim 1 or 2, further comprising a control command output unit that outputs one of the control commands to the variable voltage variable frequency control means and the constant voltage / constant frequency control means.