JP2011166964A - Control device of power converter for train - Google Patents

Abstract

In a control device for a vehicle power converter in which a plurality of control devices are connected via a network, when a microcomputer failure or a network failure is detected in a connected control device, a high-speed protection operation is required in the connected control device. In this case, the protection operation should be made redundant and faster.
A vehicle control means 1 that receives a driving command, converter control means 2a, 2b that control power converters 5a, 5b in accordance with the control command of the means 1, and both means 1, 2a, 2b are connected. Network 32a, 32b and failure signal communication means 33a, 33b, 34a, 34b. The vehicle control means and converter control means confirm the soundness by network communication with the connection destination control means and detect abnormalities. In such a case, and when a high-speed protection operation is necessary for the connection destination control means, the protection operation is executed for the connection destination control means by the failure signal communication means.
[Selection] Figure 1

Description

  The present invention relates to a control device for a vehicle power converter such as a vehicle inverter, a vehicle converter, and a vehicle power supply device.

  A conventional control device for a vehicle power converter includes vehicle control means for determining a driving state based on driving information necessary for determining a driving state of the vehicle, and a conversion for controlling the power converter according to the determined driving state. The controller control means is connected by communication means, and the vehicle control means can communicate the operating state to a plurality of converter means. As a result, the input / output information common to the control means is collected in the vehicle control means, and transmitted and received using the converter control means and the communication means, thereby reducing the number of wires of the input / output information.

Japanese Patent Application No. 2009-146285

  In the configuration in which the vehicle control means and the converter control means are connected by the hub type network communication means and the communication means for failure information communication described in Patent Document 1, an abnormality has occurred in the microcomputer or software of the control means that has received the failure information. In such a case, there is a problem that the protection operation cannot be executed.

  Furthermore, even if the control means that received the failure information is healthy, there will be a delay by the time of software processing such as failure information reception processing and protection operation execution processing from when the failure information is received until protection operation is executed There is also a problem to do.

  The above-described problems are that the PWM pulse output means of the converter control means can be stopped by the failure signal communication means of the vehicle control means, and that the breaker control means of the vehicle control means is shut off by the communication means for communication of fault information of the converter control means. This can be solved by enabling the device open command output. When the network communication means fails, the vehicle control means detects a failure that requires a PWM pulse stop, and the converter control means detects a failure that requires the circuit breaker to be opened via the network communication means. Therefore, the protection operation can be performed on the connection destination control means.

  As described above, according to the present invention, when the soundness of the network communication means cannot be maintained by executing the protection operation in the failure signal communication means, an abnormality has occurred in the microcomputer or software on the failure information receiving side. Even in such a case, the control unit that has detected the failure information can execute the protection operation on the connection-destination control unit.

  When the vehicle control means stops the PWM pulse of the converter control means by the failure signal communication means, the PWM pulse can be stopped even when the converter control means cannot stop the PWM pulse.

  When the converter control means outputs the circuit breaker opening signal of the vehicle control means by the failure signal communication means, the circuit breaker opening signal can be output even when the vehicle control means cannot output the circuit breaker opening means.

  When the failure detection means of the converter control means detects a failure that requires the output of the circuit breaker open signal of the vehicle control means, the failure detection means is used for fault information communication without going through the software processing of the converter control means. By outputting the circuit breaker open signal of the vehicle control means through the communication means, the breaker will be used even when a failure occurs in the microcomputer or software of the converter control means and when a high-speed protection operation is required without using software processing. An open signal can be output.

FIG. 1 is a control device for a vehicle power converter according to an embodiment of the present invention.

  Hereinafter, embodiments of the invention will be described with reference to the drawings. FIG. 1 shows a control apparatus for a vehicle power converter according to an embodiment of the present invention. In the present embodiment, a case where two inverter devices are driven will be described.

  In this embodiment, the vehicle control means 1 includes a microcomputer 10, a vehicle information control device interface 11, an Ethernet (registered trademark) interface 12, a switching hub 13, a digital output interface 14, and a failure detection means 15, and includes a vehicle information control device interface. 11, the operation command 22 outputted from the vehicle information control device 3 is inputted, and the contact signal 24 of the circuit breaker 4 and the failure signals 33a, 33b of the conversion control means 2a, 2b are inputted to the failure detecting means 15.

  The microcomputer 10 determines a breaker state and a control command from the operation command 22, the contact signal 24, and the failure signals 33a and 33b. The drive signal 23 is output from the digital output interface 14 to the circuit breaker 4 in accordance with the state of the circuit breaker determined here, and the determined control command is sent to the Ethernet interface 12 and the switching hub 13 to control the Ethernet signals 32a and 32b with the converter. The data is output to the Ethernet interfaces 19a and 19b of the means 2a and 2b.

  Next, the two converter control units 2a and 2b include microcomputers 16a and 16b, analog input interfaces 17a and 17b, failure detection units 18a and 18b, Ethernet interfaces 19a and 19b, pulse interfaces 20a and 20b, a logic circuit 21a, The microcomputer 16a, 16b takes in control commands from the Ethernet signals 32a, 32b via the Ethernet interfaces 19a, 19b.

  The microcomputers 16a and 16b output the PWM pulse signals 30a and 30b via the logic circuits 21a and 21b, and drive the inverter devices 5a and 5b. Thereby, the rotational speeds of the three-phase induction motors 6a and 6b are controlled. The rotational speeds of the three-phase induction motors 6a and 6b are converted into pulse trains 29a and 29b proportional to the speed by the pulse generators 7a and 7b, and input to the microcomputers 16a and 16b via the pulse interfaces 20a and 20b. In the case of speed sensorless control, the pulse generators 7a and 7b can be omitted because the rotational speed of the motor is estimated from the motor current.

  In addition, the motor currents 26a, 27a, 28a and 26b, 27b, 28b detected by the current detectors 8ua, 8va, 8wa and 8ub, 8vb, 8wb, and the inverter devices 5a, 5b detected by the voltage detectors 9a, 9b The power supply voltages 25a and 25b are input to the microcomputers 16a and 16b via the analog input interfaces 17a and 17b. Since the motor current can be obtained by adding and inverting the current values for two phases to obtain the remaining one-phase current value, the number of current detectors can be omitted to two per motor.

  The microcomputer 10 of the vehicle control means 1 confirms the soundness of the converter control means 2a and 2b from the communication period of the Ethernet signals 32a and 32b and the error detection code of the received data, and confirms the abnormality of the converter control means 2a and 2b. In this case, the drive signal 23 of the circuit breaker 4 is cut off via the digital output interface 14 to disconnect the power supplied to the inverter devices 5a and 5b, and the fault signals 34a and 34b are output via the fault detection means 15. .

  The microcomputers 16a and 16b of the converter control means 2a and 2b confirm the soundness of the vehicle control means 1 from the communication period of the Ethernet signals 32a and 32b and the error detection code of the received data, and confirm the abnormality of the vehicle control means 1. In this case, the PWM pulse signals 30a and 30b are stopped and the failure signals 33a and 33b are output via the failure detection means 18a and 18b.

  Even when the vehicle control means 1 and the converter control means 2a and 2b are healthy and a network failure such as disconnection occurs in the Ethernet signals 32a and 32b, the vehicle control means 1 and the converter control means 2a and 2b are not connected to the Ethernet signal 32a. , 32b is determined as a connection destination control means from the error detection code of the received data, and the failure signal 33a, 33b, 34a, 34b is output via the failure detection means 15, 18a, 18b. Is possible.

  The converter control means 2a, 2b confirms the soundness of the PWM pulse signal by comparing the PWM pulse signals 30a, 30b and the PWM pulse feedback signals 31a, 31b with the logic circuits 21a, 21b, and detects abnormalities in the PWM pulse signal. When detected, the PWM pulses 30a and 30b are stopped by the logic circuits 21a and 21b, and the failure signals 33a and 33b are output via the failure detection means 18a and 18b.

  The vehicle control means 1 inputs the failure signals 33 a and 33 b of the converter control means 2 a and 2 b to the failure detection means 15, and the failure detection means 15 interrupts the drive signal 23 of the circuit breaker 4 via the digital output interface 14. Then, the power supplied to the inverter devices 5a and 5b is disconnected.

  The converter control means 2a, 2b inputs the failure signals 34a, 34b of the vehicle control means 1 to the failure detection means 18a, 18b, and stops the PWM pulse signals 30a, 30b of the corresponding inverter devices 5a, 5b.

DESCRIPTION OF SYMBOLS 1 Vehicle control means 2a Converter control means 2b Converter control means 3 Vehicle information control apparatus 4 Circuit breaker 5a Inverter apparatus 6a Three-phase induction motor 6b Three-phase induction motor 7a Pulse generator 7ua Pulse generator 8ua Current detector 8va Current Detector 8wa Current detector 8ub Current detector 8vb Current detector 8wb Current detector 9a Voltage detector 9b Voltage detector 10 Microcomputer 11 Vehicle information control device interface 12 Ethernet interface 13 Switching hub 14 Digital output interface 15 Fault detection means 16a Microcomputer 16b Microcomputer 17a Analog input interface 17b Analog input interface 18a Failure detection means 18b Failure detection means 19a Ethernet interface 19b Ethernet interface 20a Pulse interface 20b Pulse interface 21a Logic circuit 21b Logic circuit 22 Operation command 23 Drive signal 24 Contact signal 25a DC power supply voltage 25b DC power supply voltage 26a Motor current 26b Motor current 27a Motor current 27b Motor current 28a Motor current 28b Motor current 29a Pulse train 29b Pulse train 30a PWM Pulse signal 30b PWM pulse signal 31a PWM pulse feedback signal 31b PWM pulse feedback signal 32a Ethernet signal 32b Ethernet signal 33a Failure signal 33b Failure signal 34a Failure signal 34b Failure signal

Claims (4)

  A control command for controlling the speed of the motor of the vehicle based on a power running or brake operation command and a vehicle control means for determining a circuit breaker on / off command, and a power converter by a PWM pulse according to the determined control command. In a control device for a vehicle power converter, comprising converter control means for controlling, wherein the vehicle control means and the converter control means are connected by network communication means and fault signal communication means. The vehicle control means and the converter control The means confirms the soundness of the vehicle control means or the converter control means of the connection destination using the network communication means, and detects the failure of the vehicle control means or the converter control means of the connection destination and the connection destination When a failure that requires a protective action is detected in the control means, the vehicle control means to be connected or the conversion by the failure signal communication means A control device for a vehicle power converter and outputs a protection operation command to the control unit.   The vehicle control means according to claim 1, wherein when the failure of the converter control means at the connection destination is detected, the PWM pulse of the converter control means is stopped by the failure signal communication means. A control device for a vehicle power converter.   The converter control means according to claim 1, when a failure of the connected vehicle control means is detected, the failure signal communication means outputs an instruction to open the circuit breaker of the vehicle control means. A control device for a vehicle power converter.   When the failure detection means of the converter control means according to claim 1 detects a failure that requires the circuit breaker open signal output of the vehicle control means, the failure detection means performs software processing of the converter control means. A vehicle power converter control device that outputs a circuit breaker open signal of the vehicle control means by the failure signal communication means without intervention.

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