JP2010017024A - Testig method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a testing method and device by which a control circuit of a railroad three-phase motor is quickly and easily tested. <P>SOLUTION: Disclosed is the testing method for the control circuit including: a control part for outputting control signals to the railroad three-phase motor for each phase, based on output signals from a notch of a driver's seat; and an inverter which controls the railroad three-phase motor, based on the control signals output from the control part for each phase. The testing method includes: a voltage supply step of supplying a test voltage, which is lower than a voltage to drive the railroad three-phase motor and higher than the voltage to drive the inverter, to the inverter; a detection step of detecting the control signals, which are input into the railroad three-phase motor, for each phase in a state where the test voltage is supplied to the inverter by the voltage supply step; and a determination step of determining an abnormal portion of the control circuit, based on the control signals, which are detected by the detection step, for each phase. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a test method and a test apparatus for a control circuit connected to a railway three-phase motor.

The railway receives a pantograph on the upper surface of the vehicle, a three-phase electric motor for railway to which electric power is supplied from the pantograph, a notch provided in the driver's seat, and an output signal from the notch, and the three-phase electric motor for railway Generally, a control circuit for controlling the rotation speed is provided.
The control circuit receives the output signal output by the driver operating the notch in a state where the driving voltage is supplied from the pantograph to the railway three-phase motor, and inputs the control signal to the railway three-phase motor. To do. Thereby, the start, stop, and traveling speed of the railway vehicle are controlled.

Here, in order to check whether or not the three-phase motor provided in the railway is properly driven, there is a request to test the control circuit in a state provided in the railway.
Conventionally, various test apparatuses for testing a control circuit are used (for example, refer to Patent Document 1).
JP 2000-69765 A

However, these test apparatuses are used for a load driven by a small voltage and cannot be applied to a control circuit for a railway three-phase motor to which a large voltage of 1000 V or more is supplied.
Even if it is a testing device that can handle large voltages, not only is it difficult to handle large voltages, but it is also necessary to run a railway for testing, which increases the workload for testing. End up.

  This invention is made in view of such a situation, Comprising: It aims at providing the test method and test apparatus which can test the control circuit of the three-phase motor for railroads quickly and easily. .

In order to solve the above problems, the present invention provides the following means.
The present invention provides a control unit that outputs a control signal for each phase to a railway three-phase motor driven by electric power supplied via a pantograph based on an output signal from a notch in a driver's seat, and the control And a control circuit test method comprising an inverter for controlling the railway three-phase motor based on a control signal for each phase output from the unit, the voltage being smaller than the voltage for driving the railway three-phase motor, And a test voltage larger than a voltage for driving the inverter is supplied to the inverter in a voltage supply step for supplying the inverter, and the test voltage is supplied to the inverter by the voltage supply step. Detecting the control signal for each phase, and the control based on the control signal for each phase detected by the detection step Characterized in that it comprises a determination step of determining abnormalities of the road.

  Further, in the determination step, when an abnormality appears in only one of the phases among the waveforms of the control signals for the phases, the determination step may be performed downstream of the output of the control unit. It is determined that an abnormality has occurred, and when an abnormality appears in all the phases of the waveform, it is determined that the abnormality is upstream of the output of the control unit.

  Further, the present invention provides a control unit that outputs a control signal for each phase to a railway three-phase motor driven by electric power supplied via a pantograph based on an output signal from a notch of a driver seat; And a control circuit testing device comprising an inverter for controlling the three-phase electric motor for railroads based on a control signal for each phase output from the control unit, and more than a voltage for driving the three-phase electric motor for railroads. A voltage supply unit that supplies a test voltage that is smaller and larger than a voltage that drives the switch of the control circuit to the inverter, and the voltage supply unit supplies the test voltage to the inverter. And a detection unit that detects a control signal input to the three-phase motor for each phase.

  According to the present invention, in the state where the test voltage is supplied to the inverter by the voltage supply step, the detection signal is detected for each phase by the detection step, and the determination is made based on the detection result. Since the abnormal part of the control circuit is determined by the step, the control circuit of the railway three-phase motor can be tested quickly and easily.

(Embodiment)
Hereinafter, a test method and a test apparatus according to embodiments of the present invention will be described with reference to the drawings.
First, a drive system provided in a railway vehicle will be described.
As shown in FIG. 1, the vehicle includes a pantograph 1 that receives power from an overhead line, a main transformer 2 connected to the pantograph 1, and a voltage conversion unit 3 connected to the main transformer 2. . The vehicle also includes a pair of inverters 4 and 5 connected to the voltage converter 3 and a motor (three-phase electric motor for railway) 6 connected to each of the inverters 4 and 5.

The pantograph 1 is provided on the upper surface of the railway, receives power from the overhead line, and supplies it to the main transformer 2.
The main transformer 2 receives the voltage from the pantograph 1, adjusts it to a predetermined voltage value, and supplies the adjusted voltage to the voltage conversion unit 3.
The voltage conversion unit 3 includes a converter unit 31 that converts alternating current into direct current. Converter unit 31 rectifies the voltage output from main transformer 2 and outputs it as a DC voltage. Then, the voltage conversion unit 3 outputs a DC voltage to the inverters 4 and 5.
The inverters 4 and 5 include a pair of power transistors 41 and 51 connected in series, and a pair of diodes 42 and 52 connected in series. The power transistors 41 and 51 and the diodes 42 and 52 are connected in series to form one set, and one set is connected to each phase U1, V1, W1 and U2, V2, W2.
The motor 6 is a three-phase motor, and is connected to the inverter 4 as a pair and to the inverter 5 as a pair.

Next, a control system (control circuit 100) provided in a railway vehicle will be described with reference to FIG.
The control circuit 100 includes a control unit 8 that receives an output signal (notch signal) from a notch 7 provided in the driver's seat, a base amplifier BA connected to the control unit 8, the above-described inverters 4 and 5, and a motor. 6 is provided.
The control unit 8 includes a contactless control device 81 connected to the output of the notch 7 and an E / O unit 82 connected to the contactless control device 81.
As shown in FIG. 3, the IOP card (control input signal conversion unit) 81a of the contactless control device 81 receives an output signal from the notch 7 input via the interface unit IF, and receives a photocoupler circuit. For example, it is converted to DC5V level and transmitted to the microcomputer.
The DC10 card (brake signal input circuit) 81b inputs a response load signal and a power generation brake signal necessary for control, and outputs them to the gate control unit.
The DC12 card (main circuit feedback amount detection unit) 81c receives the main circuit feedback amount (filter capacitor voltage, motor current, arm voltage, etc.) necessary for control, and performs impedance conversion through the buffer circuit. Further, the DC12 card 81c performs protection detection and transmits the detection result to the protection logic circuit.

The AII2 card (analog input / output I / F circuit) 81d and the AOI2 card (analog input / output I / F circuit) 81e are analog signals obtained by impedance conversion in the DC10 card 81b and DC12 card 81c and converted into digital signals by the A / D converter. And output to the microcomputer. The AII2 card 81d and the AOI2 card 81e convert the digital signal output from the microcomputer into an analog signal and output it to the outside.
The LG09 card (protection logic circuit) 81f adds various conditions based on a protection detector operation signal detected by the DC12 card 81c or a similar signal detected by the microcomputer, and outputs a final protection output. It is composed of a logic circuit, a photocoupler circuit, and the like, and converts it to a 24V level signal.
The FD01 card (pulse generator, I / F circuit) 81g and the DD03 card (pulse generator, I / F circuit) 81h input the PG output of the motor, and the pulse waveform is converted to DC5V level by the photocoupler circuit. To calculate the motor frequency. Further, the FD01 card 81g and the DD03 card 81h detect the rotation direction from the phase difference between the A phase and the B phase of PG, and output it to the microcomputer.

The CPU0 card (arithmetic unit) 81i, the CPU1 card (arithmetic unit) 81j, and the CPU2 card (arithmetic unit) 81k drive a converter and an inverter based on a signal input from the outside via the I / F.
The PC04 card (PWM modulation circuit) 81m generates a three-phase PWM signal from the modulation factor, inverter frequency, and pulse mode signal calculated by the CPU cards 81i, 81j, 81k.
The GP08 card (gate pulse generation circuit) 81n generates a gate signal of each element based on the PWM signal generated by the PC04 card 81m and outputs the gate signal to the E / O unit 82.

Further, as shown in FIG. 2, the E / O unit 82 receives an output signal from the non-contact control device 81, converts it into an optical signal by electro-optical conversion, and uses this optical signal as a control signal for each phase U1. , V1, W1 and U2, V2, W2 to the base amplifier BA.
The base amplifier BA converts the optical signal output from the E / O unit 82 into an electrical signal, performs predetermined amplification, and outputs the signal as a control signal.
The inverters 4 and 5 control the drive voltage supplied to the motor 6 based on the control signal output from the base amplifier BA, and control the speed of the vehicle via the rotational speed of the motor 6.

Next, the test apparatus 10 according to the present invention will be described.
As shown in FIG. 4, the test apparatus 10 includes an input unit (detection unit) 11 connected to the output of the inverter 4, an input unit (detection unit) 12 connected to the output of the inverter 5, test results, and the like. Display units (detection units) 13 and 18 for displaying are provided. In addition, the test apparatus 10 includes an output unit (voltage supply unit) 14 that outputs a test voltage to the inverters 4 and 5, an external power input unit 15 that inputs an external commercial power supply (AC 100 V), and on / off of the main unit power source and the inverter power source An input switch 16 for performing the operation and an adjustment dial 17 for adjusting the magnitude of the voltage value of the test voltage are provided.

The input units 11 and 12 receive inverter output signals (control signals) output from the phases U1, V1, W1 and U2, V2, W2 of the inverters 4, 5, respectively.
The display unit 13 displays the waveform of the inverter output signal of each phase U1, V1, W1 and U2, V2, W2 input by the input units 11, 12. The display unit 18 displays the frequency, voltage, and current under test supplied to the inverters 4 and 5.
The output unit 14 is connected to the inputs in (shown in FIG. 1) of the inverters 4 and 5 and outputs the test voltage generated by the voltage generator (not shown) built in the device to the inverters 4 and 5. Since the collector-emitter saturation voltage (temperature T _j = 25 ° C.) of the power transistor 41 is 3.0 V, supplying a voltage of 6.0 V or more to the inverters 4 and 5 allows the inverters 4 and 5 to Current flows. Therefore, the test voltage is 6.0V or higher. However, the test voltage may be in the range of 5V to 10V, assuming that the minimum voltage value driven by the inverters 4 and 5 is 5V. Here, 9V is supplied in particular.
The adjustment dial 17 adjusts the voltage value of the test voltage output from the output unit 14 to 5 V to 10 V by the rotation operation of the operator. Here, as described above, the test voltage is adjusted to 9V.

Next, the operation of the test method and test apparatus according to this embodiment configured as described above will be described.
First, the test apparatus 10 is connected to a drive system and a control system of a train stopped in a garage or the like in a state where driving power (main power) supplied to the train via the pantograph 1 is turned off. That is, the outputs of the inverters 4 and 5 and the input units 11 and 12 are connected, and the input in and the output unit 14 of the inverters 4 and 5 are connected.
Further, the external power input unit 15 is connected to an external power source. In this state, the main power supply of the apparatus is turned on via the input switch 16, and the inverter power supply is turned on.
Then, the adjustment dial 17 is operated to set the test voltage to 9V.
As a result, the test voltage 9V is supplied to the inverters 4 and 5. Therefore, the inverters 4 and 5 are driven, and the motor 6 is not driven. At this time, the frequency of the test voltage is set to be equal to the frequency of the actual drive voltage supplied to the motor 6 via the pantograph 1. In other words, the test voltage and the actual drive voltage have the same frequency and only the different amplitude among the voltages supplied to the inverters 4 and 5.

By operating the notch 7 in this state, an output signal is output to the contactless control device 81. The contactless control device 81 receives the output signal output from the notch 7, performs a predetermined process, and then outputs the output signal to the E / O unit 82.
The E / O unit 82 receives the output signal output from the non-contact control device 81 and converts the output signal into an optical signal. Then, the E / O unit 82 outputs the optical signal as a control signal to the base amplifier BA of each phase U1, V1, W1 and U2, V2, W2.
The base amplifier BA converts the control signal output from the E / O unit 82 into an electric signal, amplifies it, and outputs it to the inverters 4 and 5. The inverters 4 and 5 receive the control signal output from the base amplifier BA, and output a predetermined inverter output signal to the motor 6 by PWM control.

The inverter output signals output from the inverters 4 and 5 are input to the test apparatus 10 via the input units 11 and 12. These inverter output signals are displayed as waveforms on the display unit 13 for each of the inverters 4 and 5.
Here, when the control circuit 100 operates normally, the waveforms of the phases U1, V1, W1 and U2, V2, W2 are periodically repeated at a predetermined frequency as shown in FIG. It will be a thing.
However, when there is an abnormality in the control circuit 100, an abnormality appears in the waveform of the inverter output signal.
For example, as shown in FIG. 6, when an abnormality appears only in any one of the phases U1, V1, W1 and U2, V2, W2 (V1 phase), the output of the control unit 8 from the notch 7 Up to this point, it is determined to be normal, and it can be determined that there is an abnormality on the downstream side (motor 6 side) from the output of the control unit 8. That is, it can be determined that the V1 phase line is abnormal among the phases U1, V1, W1 and U2, V2, W2.

On the other hand, for example, as shown in FIG. 7, when a periodic arrhythmia (abnormality) appears in a plurality of phases among the phases U1, V1, W1 and U2, V2, W2, the output of the control unit 8 Can also be determined to be abnormal on the upstream side (notch 7 side). The control unit 8 itself is also included on the upstream side.
Furthermore, abnormality of the non-contact control device 81 in the control unit 8 is determined as follows.
1) If there is an abnormality in the IOP card 81a, all six graphs of each phase U1, V1, W1 and U2, V2, W2 should show an abnormality.
Therefore, the test results in FIG. 7 do not correspond to the cause of the current arrhythmia.
2) The DC10 card 81b and the DC12 card 81c are cards that are used to sense the current and voltage of the main circuit during actual driving. Because it is not used for this, it does not fall under the cause of this arrhythmia.
3) The FD01 card 81g and the DD03 card 81h are cards used for sensing the number of revolutions of the motor when actually running. Since it is not used, it does not correspond to the cause of this arrhythmia.
4) The LG09 card 81f is a card that is used to detect anomalies from each sensor during actual driving, and is not used when testing with the “empty notch” as in this case. This does not correspond to the cause of arrhythmia.
5) The AII2 card 81d and the AOI2 card 81e are cards used to convert signals from the DC1081b and the DC12 card 81c when actually running. Because it is not used in the case of, it does not correspond to the cause of this arrhythmia.

6) Each CPU card 81i, 81j, 81k is a card that calculates modulation rate, inverter frequency, pulse mode, etc. However, since there is no abnormality in wavelength or amplitude in this abnormality, the cause of this arrhythmia is Not applicable.
7) If there is an abnormality in the PC04 card 81m, an abnormality occurs in the three-phase PWM signal, which may be a cause of arrhythmia that occurs periodically like this time.
8) If there is an abnormality in the GP08 card 81n, an abnormality occurs in the gate signal, which may be a cause of arrhythmia that occurs periodically like this time.
9) Since the DM01 card 81p is a card that stores running records and abnormal records, it does not correspond to the cause of the current arrhythmia.

According to the erasing methods 1) to 9), it is highly likely that the PC04 card 81m or the GP08 card is out of order.
In this way, the abnormal part of the control circuit 100 is specified.

As described above, according to the test method and the test apparatus 10 in the present embodiment, the inverters 4 and 5 are driven and the test voltage that does not drive the motor 6 is supplied to the inverters 4 and 5 to perform the test. Therefore, the control circuit 100 can be quickly and easily tested in a state where the vehicle is stopped without supplying a large amount of electric power required for the vehicle or driving the vehicle.
In addition, the test can be performed with high accuracy without being affected by fluctuations in the load (motor 6) as compared with the case where the test is performed while the vehicle is running.
Moreover, since the abnormality of the control circuit 100 is determined based on the abnormality of the waveform of each phase U1, V1, W1 and U2, V2, W2 with respect to the inverter output signal, the above-described parts of the control circuit 100 can be easily detected. Can do.

In the present embodiment, the tester determines the waveform of the inverter output signal. However, the present invention is not limited to this, and the test apparatus 10 determines in the same manner as described above based on the inverter output signal. May be. In this case, the amplitude value of the inverter output signal or the like changes beyond a predetermined value every successive time, or the periodicity of abnormality for each phase U1, V1, W1 and U2, V2, W2, etc. From this, arrhythmia is determined. Then, based on the determined arrhythmia pattern and a correspondence table of prearranged arrhythmia patterns and failure sites, the test apparatus 10 detects the failure site.
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

It is explanatory drawing which shows the circuit of the drive system by which the test method and test apparatus which concern on this invention are installed. It is a block diagram which shows the control circuit used as the test object of the test method and test apparatus which concern on this invention. It is a block diagram which shows the non-contact control apparatus of FIG. 1 is a plan view showing a test apparatus according to the present invention. It is a figure which shows the waveform of an inverter output signal, Comprising: It is a wave form diagram which shows an appropriate waveform when a control circuit is normal. It is a figure which shows the waveform of an inverter output signal, Comprising: It is a wave form diagram which shows a waveform when abnormality has appeared only in one phase of each phase. It is a figure which shows the waveform of an inverter output signal, Comprising: It is a wave form diagram which shows a waveform when an arrhythmia has appeared in each phase.

Explanation of symbols

1 Pantograph 4, 5 Inverter 6 Motor (3-phase motor for railway)
7 Notch 8 Control unit 10 Test device 11, 12 Input unit (detection unit)
13 Display unit (detection unit)
14 Output section (voltage supply section)
100 Control circuit

Claims (3)

A control unit that outputs a control signal for each phase to a railway three-phase motor driven by electric power supplied via a pantograph based on an output signal from a notch of a driver's seat, and is output from the control unit And a test method for a control circuit comprising an inverter for controlling the three-phase motor for railways based on a control signal for each phase,
A voltage supply step of supplying a test voltage, which is smaller than a voltage for driving the three-phase electric motor for railroads and larger than a voltage for driving the inverter, to the inverter;
A detection step of detecting, for each of the phases, a control signal input to the railway three-phase motor in a state where the test voltage is supplied to the inverter by the voltage supply step;
And a determination step of determining an abnormal part of the control circuit based on a control signal for each phase detected by the detection step. In the determination step, when an abnormality appears in only one of the phases in the waveform of the control signal for each phase, it is determined that the abnormality is downstream of the output of the control unit,
2. The test method according to claim 1, wherein when an abnormality appears in all the phases of the waveform, it is determined that the abnormality is upstream of the output of the control unit. A control unit that outputs a control signal for each phase to a railway three-phase motor driven by electric power supplied via a pantograph based on an output signal from a notch of a driver's seat, and is output from the control unit And a control circuit testing device comprising an inverter that controls the three-phase electric motor for railroads based on a control signal for each phase,
A voltage supply unit that supplies a test voltage that is smaller than a voltage that drives the three-phase electric motor for railways and that is larger than a voltage that drives a switch of the control circuit to the inverter;
A test apparatus comprising: a detection unit configured to detect, for each phase, a control signal input to the railway three-phase motor in a state where the test voltage is supplied to the inverter by the voltage supply unit. .

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