JPH0345961B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a non-contact relay aging test device for a cam motor for a main controller of an electric train.

(Prior art) The non-contact relay that is the subject of the test of the present invention rotates the freewheel by rotating the rotating shaft of the cam motor clockwise or counterclockwise in response to an R or L signal from a main controller etc. By closing or opening the contact with a cam attached to the camshaft of the camshaft contactor, it is possible to change the series or parallel combination of the motor groups that constitute the main motor for driving a train, or to The speed of the train is controlled by changing the resistance value of the main resistance connected to the train.

FIG. 3 shows an example of the circuit.

The R signal from the main controller is given to gates G ₁₁ , G ₁₃ and G ₂₃ via a magnetic amplifier (not shown), thereby making thyristors SCR ₁₁ , SCR ₁₂ and SCR ₂ conductive, and power supply E → U ₁ → SCR ₁₁ →SCR ₂ →
Non-contact relay Re ₂ → Diode D ₄ → Non-contact relay
Re ₁ → V ₁ and power supply → V ₁ → Solid state relay Re ₁ →
SCR ₁₂ →SCR ₂ →Solid state relay Re ₂ →Diode
A circuit of D ₃ →U ₁ is constructed, and the rotating shaft of the cam motor M rotates clockwise. When the R signal disappears, the gate
A signal is input to G ₂₃ , G ₄₂ and G ₅₂ , and thyristors SCR ₂ , SCR ₄ and SCR ₅ conduct, but SCR ₄
→Re ₂ →SCR ₅ →The circuit of diode _D2 becomes short-circuited, and a current flows in the direction opposite to the rotation direction of the main motor M due to the output from the gate transformer Tg.
Electric brakes are applied. The L signal from the master controller is passed through a magnetic amplifier to gates G ₃₁ , G ₃₃ and G ₄₂
and thereby the thyristor SCR ₃₁ ,
SCR ₃₂ and SCR ₄ conduct, U ₁ → SCR ₃₁ → SCR ₄ → solid state relay Re ₂ → diode D ₄ → solid state relay
Re ₁ →V ₁ and V ₁ →Re ₁ →SCR ₃₂ →SCR ₄ →Re ₂ →
A circuit of diode D ₃ →U ₁ is constructed, and the rotation shaft of the cam motor M rotates to the left. When the L signal disappears, the thyristor
SCR ₂ , SCR ₄ and SCR ₅ conduct, but SCR ₂ →
The circuit of Re ₂ → SCR ₅ → diode D ₁ is short-circuited, and a current flows in the direction opposite to the rotational direction of the main motor M due to the output from the gate transformer Tg, and an electric brake is applied.

(Problems to be Solved by the Invention) The present invention detects sudden malfunctions often seen in the non-contact relay circuit whose circuit diagram is shown in FIG. The purpose is to improve the reliability of vehicles and promote the prevention of vehicle failures.

(Means for Solving the Problems) The present invention supplies a drive current to a motor in a first direction when a first command signal is given, and when a second command signal is given. , a cam for a main controller of a train, which has the function of supplying a drive current to an electric motor in a second direction and supplying a control current in a direction that suppresses rotation of the electric motor when no command signal is applied. Regarding the non-contact relay of an electric motor, in the equipment that performs the test, the non-contact relay to be tested is subjected to a first period in which the first command signal is output, a second period in which no command signal is output, and a second period in which no command signal is output. A command signal generation circuit that periodically repeats a one-cycle operation consisting of a third period in which the second command signal is output and a fourth period in which no command signal is output, and a current supply path from a non-contact relay. , a determination circuit that has a resistance element connected in series with the motor and determines which of the voltages at both ends of this resistance element is higher, and a determination circuit that determines appropriate determination results for each of the four periods in the command signal generation circuit. The apparatus is equipped with an abnormality detection circuit that monitors whether the judgment result is output and notifies an abnormality when an incorrect judgment result is output.

(Example) The present invention will be described below based on an example shown in FIG. The device shown in FIG. 1 can be divided into several components by blocks surrounded by dashed lines. The main components are a command signal generation circuit indicated by block A located in the upper left of the figure, a determination circuit indicated by block B located in the upper right of the figure, and an abnormality detection circuit indicated by block C located in the lower part of the figure. It is a detection circuit. The non-contact relay to be tested by this device is indicated as NCR at the upper left of block B, and the cam motor M for the main controller of the train is connected to this non-contact relay.

The purpose of this device is to test whether the non-contact relay NCR operates correctly. As explained based on the example shown in Fig. 3, the operation of the non-contact relay NCR is to supply a drive current to rotate the motor M left and right and to apply an electric brake to the motor M. be. This operation will be explained using the circuit shown in FIG. 1 as follows. That is, when a first command signal (referred to as R signal) is applied to the input terminal R of the non-contact relay electric NCR, a drive current is supplied to the motor M from the terminal M2 side, and this drive current is composed of a resistive element. through the shunt SH (as described later, in the test operation specific to the present invention, the switch SW1 connected in parallel to the shunt SH is in an open state), the terminal M1
Return to non-contact relay NCR. In this way, the electric motor continues to rotate clockwise (hereinafter referred to as R rotation). When the supply of the R signal to the input terminal R is stopped, the non-contact relay NCR performs the electric braking operation described above, and the control current flows in the opposite direction to the shunt SH and the electric motor M, and the rotation of the electric motor is stopped. Deterred. On the other hand, when a second command signal (referred to as the L signal) is applied to the input terminal L of the non-contact relay NCR, a drive current is supplied to the motor M from the terminal M1 side, and this drive current is transmitted to the shaft composed of a resistive element. S.H.
through the terminal M2 and return to the non-contact relay NCR. In this way, the electric motor continues to rotate to the left (hereinafter referred to as L rotation). Here, when the supply of the L signal to the input terminal L is stopped, the non-contact relay NCR performs the electric braking operation described above, and the control current flows in the shunt SH and the electric motor M in the opposite direction.
Rotation of the electric motor is suppressed.

The above is the normal operation of the non-contact relay NCR.
This test equipment has a function to detect whether the non-contact relay NCR can operate normally as described above, and can operate in two test modes: manual test and aging test. . In the circuit diagram of Figure 1, switch SW1 (located at three locations: the upper left part, the upper center part, and the part adjacent to the shunt SH) is moved in the direction of the arrow in the diagram. When switched, it enters the aging test mode. Conversely, if you switch in the opposite direction of the arrow, you will enter manual testing mode. In the manual test, a test method is adopted in which an operator supplies DC power to the input terminal L or R of the non-contact relay NCR and manually inspects the operation. On the other hand, the aging test is a test performed by repeatedly performing periodic operations, and this test is performed automatically. A feature of the present invention is the ability to perform this aging test, and the operation in this aging test mode will be described below.

Before explaining the detailed operation of each circuit, the basic functions of each block A, B, and C will be explained. First, there is the command signal generation circuit A, which has a first period in which the first command signal (R signal) is output to the non-contact relay NCR, a second period in which no command signal is output, and a second period in which the command signal is not output. It has a function of periodically repeating a one-cycle operation consisting of a third period in which two command signals (L signals) are output and a fourth period in which no command signals are output. More specifically, during the first period, DC voltage DC is applied to the R terminal of the non-contact electric device NCR, during the third period, DC voltage DC is applied to the L terminal of the non-contact relay NCR, and during the second period, DC voltage DC is applied to the R terminal of the non-contact relay NCR. And during the fourth period, no DC is applied to any terminal.
Note that during the first period, the indicator light PL10 is lit,
During the third period, the indicator light PL11 lights up to notify the operator. In this way, the non-contact relay
The NCR will periodically repeat four operations.

Now, considering the current flowing through the shunt SH consisting of a resistive element, when the motor M is performing R rotation (first period) and when performing L rotation (third period), The direction of the current is reversed. Also, when the motor is rotating while giving each command signal (first period or third period)
The direction of the current is also reversed between the period when the command signal is cut off and the rotation of the electric motor is suppressed to apply the brake (the second period or the fourth period). In other words, if the direction of the current flowing through the shunt SH in the figure is expressed as "upward" or "downward" in the figure, the current flows upward, downward, and downward in the first to fourth periods, respectively.
In other words, if the direction of the current changes like this, the non-contact relay NCR
is operating normally. Judgment circuit B
is a circuit for determining the direction of the current flowing through the shunt SH. In the circuit of the embodiment shown in FIG. 1, the direction of the current is determined depending on which voltage across the shunt SH is higher. In other words, the voltage value across the shunt SH is
It is configured to be applied to the gates of SCR8 and SCR9, and depending on which thyristor is turned on, the direction of the current can be recognized, and the recognition result is sent to the indicator light PL8 or PL.
The operator is notified when any one of 9 lights up.

The last abnormality detection circuit C is the command signal generation circuit A.
Monitor whether the judgment circuit B is outputting appropriate judgment results for each of the four sections,
This circuit has the function of notifying an abnormality when an incorrect determination result is output. The section in which command signal generation circuit A is operating can be recognized by the operating states of relays RL3 and RL4, and the judgment result output by judgment circuit B can be determined by relays RL9 and RL10. It can be recognized by its operating state. In the circuit of this embodiment, six thyristors SCR1 to SCR6 and six indicator lights PL1 to PL6 are provided. When the non-contact relay NCR is operating normally, the six thyristors SCR1 to SCR6 turn on in this order, and the six indicator lights PL1 to PL6 light up in this order. . Therefore, the number of lit indicator lights gradually increases from 1 to 6. A state in which only one indicator light PL1 is lit indicates that the R rotation command has been output from the command signal generation circuit A, and a state in which two indicators up to PL2 are lit indicates that the R rotation has been output from the non-contact relay NCR. This indicates that the drive current of
This indicates that a control current that suppresses the R rotation is output. In addition, when the 4 lights up to indicator light PL4 are lit, it means that the L rotation command has been output from the command signal generation circuit A, and when the 5 lights up to indicator light PL5 are lit, it is from the non-contact relay NCR. This indicates that the drive current for the L rotation has been output, and the state in which the six lights up to the indicator light PL6 are lit indicates that the control current for suppressing the L rotation has been output from the non-contact relay NCR. Corresponding to the four periods described above, the lighting of indicator lights PL1 and PL2 is the first period, the lighting of indicator lamp PL3 is the second period, and the lighting of indicator lights PL3 is the second period.
PL4 and PL5 are lit during the third period, indicator light
The lighting of PL6 corresponds to the fourth period. thus,
When one cycle from the first to fourth periods is completed, a reset is applied, and all six indicator lights are turned off to return to the initial state. Such an operation is repeated. As mentioned above, non-contact relay
As long as the NCR is operating normally, the six thyristors SCR1 to SCR6 are turned ON in this order, but if some abnormal operation occurs, the thyristors will be turned ON skipping the correct order. In this case, the seventh thyristor is
SCR7 turns ON, and the seventh indicator light PL7 lights up to notify that an abnormality has occurred. Furthermore, buzzer BZ
sounds, relay RL8 operates, and the aging test is stopped.

The general operation of the apparatus shown in FIG. 1 has been described above, and now the operation of each circuit will be described in detail.

By closing the aging switch SW ₂ , the alternating current power AC is applied to the falling contact RL ₈ b of the aging stop relay RL ₈ , the reset relay RL ₁ and the falling contact TR ₁ b of the off time limit relay TR ₁ , and the reset relay RL ₁ is energized after 0.5 seconds, for example.
Reset relay RL ₁ operation causes its operating contacts to
RL ₁ a and RL ₁ a' are closed, and the OFF time limit relay TR ₁ and the ON time limit relay TR ₂ are closed, for example, 3
It will start working in seconds.

ON time-limited relay TR ₂ operation causes its operating contacts
By closing TR _2a , the command conversion ratchet relay
During the RR operation, its contacts RR ₁ and RR ₂ are switched to form an R rotation command circuit and an R command display circuit.
On the other hand, after 0.5 seconds, for example, the command display relay RL ₁₁ is activated and its operating contact RL _11a is closed, so that the R command indicator light RL ₁₀ lights up and the R command relay RL ₃ is activated. After operation contact TR _2a closes, rotation command relay RL ₂ operates after 0.5 seconds, and by closing operation contact RL _2a , the R signal is input to the input side of the non-contact relay device NCR, and the cam motor M is set to R. Rotate.

When the rotation detection switch SW ₃ is closed, a full-wave rectified DC voltage is generated on the output side of the rectifiers DB ₅ and DB ₆ in the judgment circuit B, while in the case of R rotation, a voltage is applied to the cam motor M from M ₂ to the output side of the rectifiers DB 5 and DB 6 in the judgment circuit B. Current flows toward _M1 , and a positive voltage is generated at 4J and a negative voltage at 4k between the shunt SH.

This current conducts R detection thyristor SCR ₈ through diode D ₈ , lights up R indicator lamp PL ₈ ,
The R detection relay RL ₉ is operated, its operating contact RL ₉ a is closed, and its drop contact RL ₉ b is open.

If the time element of off-time relay TR ₁ is set to 7 seconds, off-time relay TR 1 becomes operational 10 seconds after contacts RL _{1 a} and RL ₁ a' of reset relay RL ₁ close. Since the reset relay RL ₁ is set to a time of 0.5 seconds, the power to the OFF time limit relay TR ₁ and the ON time limit relay TR ₂ is turned off after 0.5 seconds. When reset relay RL ₁ turns off, command display relay RL ₁₁ falls and R command indicator light PL ₁₀ goes out.
Due to the fall of RL ₁₁ , the power to the non-contact relay device NCR is turned off, and the rotation of the cam motor M stops.
When the cam motor M stops, a braking current is generated _in the opposite direction _to the rotational direction as described above with reference to _FIG . Turn on the L detection indicator PL ₉ .

Next, the L command operation will be described.

After 0.5 seconds, reset relay RL ₁ becomes operational,
The ON time limit relay TR ₂ and the OFF time limit relay TR ₁ are energized. If the time element of TR ₂ is set to 3 seconds, the operation contact TR ₂ a of TR 2 will close after ₃ seconds, the ratchet relay RR will be activated, and its contacts RR ₁ and RR ₂ will be switched to the L side, causing the L rotation. A command circuit and an L instruction display circuit are configured. Command display relay after 0.5 seconds
RL ₁₁ is activated, and when its operating contact RL ₁₁ a is closed, it becomes L.
Command indicator light PL ₁₁ lights up and L command relay RL ₄ operates.

Next, 0.5 seconds later, the rotation command relay RL ₂ is activated, and the cam motor M rotates by the L rotation.

In the case of L detection, a current flows through the cam motor M from _M1 to _M2 , and a positive voltage is generated at 4k and a negative voltage is generated at 4j between shunts SH. This current makes SCR ₉ conductive, and the L rotation indicator PL ₉ lights up.
The L detection relay RL ₁₀ is activated, and this state continues until the cam motor M stops. When the L signal is no longer input, the L rotation of the cam motor M stops. When stopped, a current flows in the opposite direction to the rotation direction current, which causes the R indicator light PL ₈ and the L indicator light PL ₉ to light up, and the R detection relay RL ₉ and the L detection relay RL ₁₀ to operate.

Next, the abnormality detection circuit C will be described.

By closing the judgment switch SW ₄ , the DC power supply device DCA is activated. In this state, when R command relay RL ₃ of command signal generation circuit A is activated,
The operation contacts RL ₃ a and RL ₃ a' are closed, and the self-holding relay RL ₅ having the contact RL ₅ a is activated, and power is supplied to the operation display and failure detection circuit. Abnormality detection circuit C is activated only after R command relay RL ₃ is activated.
The detailed reason for turning on the power will be described later.

In abnormality detection circuit C, thyristors connected in series
It is configured to issue an abnormality alarm if SCR ₁ to SCR ₆ do not become conductive in sequence, and to stop aging while the non-contact relay device NCR continues normal operation throughout the entire operation process.

When R command relay RL ₃ is activated, the thyristor
Gate current flows through SCR ₁ , SCR ₁ becomes conductive, and R indicator light PL ₁ lights up. Next, when R detection relay RL ₉ is activated, its operation contact RL ₉ a closes and the relay
Thyristor for rotation R via contact RL ₆ a of RL ₆
Gate current flows to SCR ₂ and SCR ₁ is already conductive, so SCR ₂ is conductive and rotation R indicator light PL ₂
lights up.

Next, when the R rotation of the cam motor M stops and the L detection relay RL ₁₀ is activated, its operation contact RL ₁₀ a
By closing the brake L thyristor
Gate current flows through SCR ₃ and SCR ₁ and SCR ₂ are conductive, so SCR ₃ is conductive and the brake L indicator light PL ₃ lights up. Next, when L command relay RL ₄ is energized, its operation Contacts RL ₄ a, RL ₄ a' are closed command L thyristor
Gate current flows through SCR ₄ , already SCR ₁ ~ SCR ₃
is conductive, so SCR ₄ is conductive, command L indicator light PL ₄ lights up, detection switching relay RL ₆ is activated, and rotation L thyristor SCR ₅ and brake R are activated.
configuring the gate circuit of thyristor SCR ₆ . or,
This energizes the abnormal alarm time relay _TR3 .

The time element of the abnormal alarm time limit relay TR ₃ is set within the time element of TR ₁ and greater than the time element of TR ₂ , thereby detecting a failure after the command L is displayed.

When the L detection relay RL ₁₀ is activated, its operating contact RL ₁₀ a closes, and the gate current flows to the rotating L thyristor SCR ₅ through the contact RL ₆ a′, which has fallen to the L side, and SCR ₅ becomes conductive. Rotation L indicator light PL ₅ lights up. Next, when the L rotation of the cam motor M stops and the R detection relay RL ₉ is activated, its operating contact RL ₉ a
is closed, gate current flows to brake R thyristor SCR ₆ via contact RL ₆ a that has fallen to the L side,
Since SCR ₁ to _{SCR 5} are conductive, SCR ₆ is conductive and the brake R indicator light PL ₆ lights up.

(Function) Next, the failure detection mechanism according to the present invention will be described.

During the test, if SCR ₁ to SCR ₆ conduct in sequence, the reverse Zener diode installed on the gate side of each thyristor SCR ₂ to _{SCR 6}
Since the potential on the cathode side of DZ ₁₂ to _{DZ 16} is maintained at 0, no voltage is applied to the gate of failure detection thyristor SCR ₇ , and error indicator PL ₇ does not light up.
Alarm buzzer BZ does not issue an alarm. When RL ₉ of the R detection relay is no longer energized, reset relay RL ₇ , which operates for a predetermined period of time by closing its falling contact RL ₉ b, becomes activated, and its falling contact RL 9 is closed.
When _RL7b is opened, the abnormality detection circuit C is reset.

However, for some reason, if the above-mentioned series of patterns of the non-contact relay device NCR goes out of order and a voltage is applied to the gate of a thyristor whose cathode side potential is not 0, the The Zener diode connected becomes conductive and gate current flows to failure detection thyristor SCR ₇ .
SCR ₇ becomes conductive.

For example, when only command R thyristor SCR ₁ is conductive, brake L thyristor SCR ₃
Even if a gate current is applied to SCR 2, since SCR ₂ is not conducting, no current flows to the cathode side of SCR ₃ . Therefore, a voltage is applied to the Zener diode _DZ13 side, making it conductive, and a gate current flows to SCR ₇ , making SCR ₇ conductive. As a result, the abnormality indicator light PL ₇ lights up, the alarm buzzer BZ issues an alarm,
Aging stop relay RL ₈ is activated to maintain this state.

Due to the operation of aging stop relay RL ₈ , its drop contact RL ₈ b is opened, and command signal generation circuit A
to protect the non-contact relay device NCR by stopping the
The state is maintained, and the operating contact of RL ₈ RL ₈ a
shorts the shunt SH by closing,
This prevents malfunctions caused by brake current. The operation indicator light maintains the display at the time when the non-contact relay device NCR was operating normally. Therefore,
It is possible to discover where an abnormality has occurred. The abnormality indicator light PL ₇ , alarm buzzer BZ and aging stop relay RL ₈ are reset by pressing the reset switch SW ₅ . In addition, one non-contact relay device NCR for the DC circuit is installed on the power supply side of the AC circuit.
Two selection switches SW 1 are inserted into the input side of the non-contact relay device NCR, and one selection switch SW ₁ is inserted into the output side of the non-contact relay device NCR. The selection switch SW ₁ is a normally open selection switch. This test is designed to enable confirmation testing of each circuit to be detected, and the check switch in abnormality detection circuit
SW ₆ is provided for pre-checking each thyristor SCR ₁ to _{SCR 6} , and the aging counter AC is a counter that counts when the operating contact RL ₄ a is closed due to the operation of the L command relay RL ₄ . ,
Judgment counter JC is the operating contact of reset relay RL ₇ .
This is a judgment counter that counts based on the closure of RL ₇ a.

(Effect of the invention) As is clear from the above, the command signal generation circuit A
Reset relay RL ₁ , ON time-limited relay
TR ₂ , ratchet relay RR, command relay RL ₁₁ ,
The operation and fall relationship of R command relay RL ₃ , L command relay RL ₄ , rotation command relay RL ₂ and off time limit relay TR ₁ are as shown in Figure 2, and the non-contact relay is activated by the operation of RL ₂ and RR. Switch the circuit to the device NCR to the R side, give the R signal to the device, display the R command by RL ₃ operation, and thereby activate the RL rotation brake by R rotation of the cam motor M of the non-contact relay device NCR. R detection relay RL ₉ of the display circuit is activated, and R detection relays RL ₉ and L are activated by a current in the opposite direction to the rotation direction that occurs when the cam motor M is stopped.
Detection relay RL ₁₀ is activated.

Therefore, the above-mentioned command signal generation circuit A and
The operation in the RL rotating brake display circuit is applied to the abnormality detection circuit C as follows to detect a failure.

The power is turned on to the abnormality detection circuit C for the first time by the operation of the R command relay RL ₃ of the command signal generation circuit A, thereby achieving an accurate and efficient configuration, thereby making the command R thyristor SCR ₁ conductive. Directive R
The indicator light PL ₁ is turned on, and then SCR ₂ is made conductive by the operation of the R detection relay RL ₉ of the judgment circuit B, the rotation R indicator lamp PL ₂ is turned on, and the R rotation of the cam motor M is stopped. Brake thyristor by L detection relay RL ₁₀ operation by brake current
Make SCR ₃ conductive and light up the brake L indicator light PL ₃ .

The R rotation ends here, and the reset relay RL ₁ is turned on again.
The following is the operation, and an L signal is given to the non-contact relay device NCR by the operation of the ratchet relay RR and the rotation command relay _RL2 . Next, when L command relay RL ₄ is activated, the command L thyristor
When SCR ₄ conducts, command L indicator light PL ₄ lights up, detection switching relay RL ₆ is activated, and rotation L thyristor
The gate circuits of SCR ₅ and nullake R thyristor SCR ₆ are configured.

When L detection relay RL ₁₀ operates, rotation L thyristor SCR ₅ becomes conductive, rotation L indicator PL ₅ lights up, and when cam motor M stops L rotation, R detection relay RL ₉ operates, and brake R thyristor SCR ₆ becomes conductive and brake R is activated. Indicator light PL ₆ lights up.

In this way, if conduction is made in order from thyristor SCR ₁ to thyristor SCR ₆ , each thyristor
The potential on the cathode side of the Zener diodes DZ ₁₂ to _{DZ 16 attached} to the gate side of SCR ₁ to SCR 6 is 0, and no voltage is applied to the gate of the failure detection thyristor SCR ₇ .

However, for some reason, if a voltage is applied to the gate of the thyristor whose cathode side potential is not 0, the Zener diode becomes conductive and SCR ₇ becomes conductive.
The error indicator PL ₇ lights up, the alarm buzzer BZ sounds, and the aging stop relay RL ₈ is activated.
Maintain that state.

Therefore, according to the present invention, sudden malfunctions found in non-contact relay devices can be detected by testing the device while it is cyclically operated, and when a malfunction is detected, Since the device and test equipment are automatically held in the state before detection,
This has a remarkable effect in that malfunctioning parts can be easily discovered, thereby improving the reliability of the device and, by extension, ensuring accurate speed control of the vehicle.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a time chart showing the operation and drop relationship of each relay in the command signal generation circuit A of Fig. 1, and Fig. 3 is a test object of the present invention. It is a circuit diagram showing a non-contact relay device. A...Command signal generation circuit, B...Judgment circuit, C
...Abnormality detection circuit, BZ...Alarm, DZ ₁₂ to _{DZ 16}
... Zener diode, M ... cam motor,
NCR... Non-contact relay device for cam motors for train main controllers, PL ₁ to PL ₆ ... Thyristor SCR ₁ to
Indicator light, RL ₁ connected in series to each of SCR ₆
...Reset relay, RL ₂ ...Rotation command relay,
RL ₃ ...R command relay, RL ₄ ...L command relay,
RL ₆ ...Relay activated by conduction of SCR ₄ ,
RL ₇ ... Reset relay, RL ₈ ... Aging stop relay, RL ₈ b... Contact that stops the operation of command signal generation circuit A, RL ₉ ... R detection relay,
RL ₁₀ ...L detection relay, SCR ₁ to SCR ₆ ...Thyristor connected in series, SCR ₇ ...Thyristor for failure detection, SW ₂ ...Aging switch, TR ₁ ...
...Self-holding OFF time-limited relay, TR ₂ ...On-time limited relay, TR ₃ ...Abnormal alarm time-limited relay.

Claims (1)

[Claims] 1. A test device comprising a command signal generation circuit A, a determination circuit B, and an abnormality detection circuit C, which test device is used for a non-contact relay NCR of a cam motor for a main controller of a train. The non-contact relay NCR to be tested supplies a driving current to the motor M in the first direction when the first command signal R is input, and the non-contact relay NCR to be tested supplies the driving current to the motor M in the first direction, and the second command signal When L is input, the drive current is supplied to the electric motor M in the second direction, and when the third command signal indicating to inhibit the electric motor M is input, the rotation of the electric motor M is inhibited. The command signal generation circuit A outputs the first command signal R to the non-contact relay NCR during the first period, and outputs the first command signal R during the second period. The determination circuit B repeats the periodic operation of outputting the third command signal, outputting the second command signal L during the third period, and outputting the third command signal during the fourth period. , has a resistance element SH installed on the current supply path that supplies current from the non-contact relay NCR to the motor M, and determines which of the voltages at both ends of this resistance element SH is higher, and is an abnormality detection circuit. C inputs the output from judgment circuit B, monitors whether judgment circuit B is outputting appropriate judgment results for each of the four periods in command signal generation circuit A, and outputs incorrect judgment results. Test equipment that notifies you of an abnormality when an abnormality occurs.