JPH02231904A - Controller for field control electric vehicle - Google Patents

Abstract

PURPOSE:To improve the operating performance by judging whether or not a main motor is in coasting control state, when the main motor is subjected to repowering control, based on the positions of notch and cam shaft then setting the repowering pattern based on a judgement signal. CONSTITUTION:When the steering wheel is moved from notch-off position to series 1 notch position in order to perform repowering after coasting control, an OR gate 34 and a NOR gate 35 produce H signals and the output from an AND gate 36 is brought to H. Since the cam shaft in a main controller is positioned at the final series stage, an AND gate 38 produces an H signal. Consequently, a contact 45 is turned ON and a repowering pattern signal output circuit 43 provides a series stage strengthen field control pattern signal to a phase command signal output circuit 30. By such arrangement, the main motor is controlled with a characteristic having different pattern and a feeling gap of operation is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control device for a field-controlled electric vehicle that performs coasting control without interrupting the main circuit.

(Prior Art) There are various types of electric railway cars, among which there are those called resistance control electric cars and field control electric cars.

FIG. 2 is a circuit diagram showing the main circuit configuration of the resistance-controlled electric vehicle. DC power from the pantograph 1 is supplied to a first main motor armature 4 via a main circuit closing/opening circuit breaker 2 and a main resistor 3. A series field winding 5, an electromagnetic contactor 6, and a field weakening resistor 7 are connected to the main motor armature 4. Further, a series field winding 9, an electromagnetic contactor 10, and a field weakening resistor 11 are connected to the second traction motor armature 8. These main motor armatures 4 and 8 are connected in series or in parallel via an electromagnetic contactor 12 for series operation and an electromagnetic contactor 13, 14 for parallel operation.

As mentioned above, the reason why the two main motors can be operated either in series connection or in parallel connection is because the current capacity of the overhead line in the branch line is small.

In other words, in the case of limited express trains, express trains, etc. that operate on both main lines and branch lines, high-speed operation is required on the branch lines as well. However, on branch lines, the substations are small and the current capacity of the overhead wires is small, so parallel connections, which would increase the armature current of the main motor, may not be possible. Therefore, by performing control to weaken the field while the two main motors are connected in series, high-speed operation can be performed.

The main controller (mascon), which is not shown, includes a first operation handle for controlling the electromagnetic contactor 12 for series operation and the electromagnetic contactor 13, 14 for parallel operation, and a main controller. The main resistor 3 and the field weakening resistor 7 are turned on and off by driving the camshaft inside the cam contactor.
．． A second control/% control is provided which makes the resistance of 11 variable. The number of notches to which the first operation handle moves is based on the combination of the connection status of the two main motors and the resistance value of each resistor, etc. Usually, the series side has two notches,
There are about 3 notches on the parallel side.

The connection states of the main circuit of FIG. 2 corresponding to each notch position are shown below.

(a) The main motor armatures 4 and 8 are connected in series with the series one-notch circuit breaker 2 and the electromagnetic contactor 12 closed. The resistance value of the main resistor 3 is the maximum and is controlled by the total field characteristics.

(Example) The main motor armatures 4 and 8 are connected in series with the series two-notch circuit breaker 2 and the electromagnetic contactors 12, 6 and 10 closed. The main resistor 3 is short-circuited and the resistance value of the field weakening resistor 7.11 is minimum.

(c) The main motor armature 4.8 is connected in series with the parallel one-notch circuit breaker 2 and the electromagnetic contactor 13.14 closed. The resistance value of the main resistor 3 is the maximum and is controlled by the total field characteristics.

(2) The main motor armature 4.8 is connected in parallel with the parallel two-notch circuit breaker 2 and the electromagnetic contactors 13, 14, 6.10 closed. The main resistor 3 is in a short-circuited state, and the resistance values of the field weakening resistors 7 and 11 are maximum.

(e) The main motor armatures 4 and 8 are connected in parallel with the parallel three-notch circuit breaker 2 and the electromagnetic contactors 13, 14, 6.10 closed. The main resistor 3 is in a short-circuited state, and the resistance values of the field weakening resistors 7 and 11 are minimum.

By the way, in the above-mentioned resistance-controlled electric vehicle, when coasting control is performed by moving the first and second operation knobs of the main controller to the notch-off position after coasting control, circuit breaker 2 is opened and the main controller is moved to the notch-off position. Since the circuit is cut off, there is a drawback that the response time when performing regenerative brake control becomes slow.

Therefore, in order to eliminate such drawbacks, field-controlled electric vehicles perform coasting control in which the armature current of the main motor is reduced to zero without interrupting the main circuit even in the event of notch-off.

FIG. 3 is a circuit diagram showing the main circuit configuration of such a field-controlled electric vehicle. However, the same components as in FIG. 2 are given the same reference numerals.

In FIG. 3, the main resistor 15 is provided between the electromagnetic contactor 13 for parallel operation and the electromagnetic contactor 12 for series operation, and the main resistor 16 is provided between the electromagnetic contactor 12 for series operation and the electromagnetic contactor for parallel operation. It is provided between the container 14 and the container 14.

These main motor armatures 4.8 are connected to shunt field windings 19, 20 and a field chopper controller 21 via a filter circuit composed of a filter reactor 17 and a filter capacitor 18. The field chopper controller 21 adjusts the field current flowing through the shunt field windings, thereby controlling the current of the traction motor armature 4.8. Note that 22 is a freewheeling diode.

In addition, the main controller of this field control electric vehicle includes a first operating handle that switches the connection state of the two main motor armatures 4 and 8, and a cam shaft in the main controller that turns the cam contactor on and off. A second operation handle is provided that changes the resistance value of the main resistor 15, 16 by adjusting the resistance value of the main resistor 15, 16.

FIG. 4 is a block diagram showing a control circuit for outputting a field chopper phase command signal to the field chopper controller 21 in FIG. 3. OR gates 22, 23 and AND gates 24, 2 are located at each notch position where the first operation handle moves and at the series and parallel final stage positions of the camshaft of the main controller.
5 is connected to the AND gates 24 and 25, and an OR gate 26 is connected to the AND gates 24 and 25.

The pattern signal output circuit 27 is adapted to output a speed control pattern signal of either a full field control pattern or a field weakening control pattern.

That is, when the H signal is output from the OR gate 22,
The contact 28 is turned on and the total field control pattern signal is outputted via the changeover switch 29.

Furthermore, when the H signal is output from the OR gate 26, the changeover switch 29 is switched and a field weakening control pattern signal is output.

The pattern signal output from the pattern signal output circuit 27 is multiplied by the armature current signal in a multiplier 31 of the phase command signal output circuit 30. Then, the difference between the output signal from the multiplier 31 and the shunt field current signal is calculated by the adder 32, and the result is output to the field chopper controller 21 (Fig. 3) as a field chopper phase command signal. .

Regarding such a field controlled electric vehicle, the connection state of the main circuit shown in FIG. 3 corresponding to each notch position is as follows. Note that FIG. 5 is a power running notch curve showing the relationship between the armature current and speed of the main motor at each notch position.

(a) The series one-notch circuit breaker 2 and the electromagnetic contactor 12 are closed, and the main motor armature 4
．． 8 are connected in series. The resistance value of the main resistor 15, 16 is the maximum, and the characteristics of the main motor are the field chopper controller 21
(Characteristic A in Figure 5)
.

(Port) The series 2 notch circuit breaker 2 and the electromagnetic contactor 12 are closed, and the traction motor armature 4
．． 8 are connected in series. Until the main resistor 15.16 is short-circuited, it is controlled by the full field characteristic (characteristic B in Figure 5), and after the main resistor 15.16 is short-circuited, it is controlled by the weakening field characteristic (characteristic 5). C characteristic in the figure).

(c) It is the same as the case of one notch in parallel and one notch in series. That is, circuit breaker 2
Then, the electromagnetic contactor 12 is closed, the main motor armatures 4 and 8 are connected in series, and the resistance value of the main resistor 15, 16 is controlled to be equivalent to the total field characteristic in the maximum state (A characteristic in Fig. 5). ).

(2) The parallel two-notch circuit breaker 2 and the magnetic contactor 13.14 are closed, and the main motor armature 4.8 is connected in parallel. It is controlled by the total field characteristics until the main resistor 15, 16 is shorted (characteristic D in Figure 5).
, after the main resistors 15 and 16 are short-circuited, the control is performed with field weakening characteristics (characteristic E in FIG. 5).

(E) The connection state is the same as in the case of 3 notches in parallel and 2 notches in parallel, and control is performed using the total field characteristics until the main resistors 15 and 16 are short-circuited (characteristic D in FIG. 5).

However, after the main resistors 15 and 16 are short-circuited, control is performed with the weakest field characteristic (F characteristic in FIG. 5).

(f) Notch off from parallel stage The connection of the parallel 2 notches, parallel 3 notches and the main circuit is the same. Then, with the main circuit turned on, the field chopper controller 21 controls the shunt field current flowing through the shunt field windings 19 and 20, thereby making the generated voltage of the traction motor the same as the overhead wire voltage. control so that the main current becomes zero.

However, due to the strongest limit on the shunt field current, at speeds below v1 shown in FIG. 5, the circuit breaker 2 opens and the main circuit is interrupted.

(g) Notch-off from series stage The connection between the two series notches and the main circuit is the same, and as with the case of notch-off from parallel stages, with the main circuit turned on,
The field chopper controller 21 controls the main current to zero. However, due to the strongest limit on the shunt field current, the circuit breaker 2 opens and the main circuit is cut off at speeds below 2 shown in FIG.

(Problems to be Solved by the Invention) As mentioned above, in the resistance-controlled electric vehicle shown in FIG. Even if one serial notch is commanded during power running again after control, power running control is always performed according to characteristic A in FIG. 5.

However, in the field-controlled electric vehicle shown in Fig. 3, the main circuit is connected even when coasting control is being performed, so even if series 1 notch is commanded during re-powering after coasting control, the control characteristics will not change. The characteristic A shown in FIG. 5 is not necessarily achieved. For example, when the main motors are connected in series, the B characteristic shown in FIG. 5 will be obtained, and when the main motors are connected in parallel, the D characteristic shown in FIG. 5 will be obtained.

Similarly, when one parallel notch is commanded during power running again after coasting control, the B characteristic or D characteristic shown in FIG. 5 will be obtained depending on the state of the main circuit.

However, if the characteristics at the time of repowering after coasting control differ between the resistance-controlled electric vehicle and the field-controlled electric vehicle in this way, the operating feeling when the driver drives the vehicle also differs greatly. Therefore, the conventional field-controlled electric vehicle has the disadvantage that it is difficult for a driver who may drive both a resistance-controlled electric vehicle and a field-controlled electric vehicle to operate the vehicle.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a field control electric vehicle control device that can minimize deviations in control characteristics that occur when repowering control is performed after coasting control with respect to the same notch position of the master controller. It is something to do.

[Structure of the invention]

(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a main circuit breaker for supplying or interrupting DC power from an overhead line, and a plurality of main circuit breakers connected to the main circuit breaker. a main motor, a main circuit having a series operation contactor and a parallel operation contactor connected between the plurality of main motors, and a plurality of cams connected to the armature current control resistor of each of the main motors. By positioning the camshaft that drives the contactor at a predetermined notch position of the main controller, the series operation contactor or the parallel operation contactor is controlled to connect the plurality of main motors in series or in parallel. a first operation handle that changes the resistance value of the armature current control resistor by controlling the plurality of cam contactors on and off via the camshaft; A pattern that outputs a speed control pattern signal corresponding to the notch position where the first operation handle is located (outputs a field chopper phase command signal based on the speed control pattern signal from the No. H output circuit and the pattern signal output circuit) a field chopper controller that adjusts a field current of a shunt field winding of the traction motor based on a field chopper phase command signal from the phase command signal output circuit; A detection circuit that detects a notch position where the first operation handle is located and a position of the camshaft, and a detection signal from the detection circuit to determine whether or not the main motor is in a coasting control state. and a repowering pattern signal output circuit that outputs a repowering speed control pattern signal to the phase command signal output circuit based on the determination signal from the determination circuit.

(Function) In the above configuration, when the first operating handle of the master controller is moved to a predetermined notch position, the series operation contactor or the parallel operation contactor turns on and off, and the main motor is connected in series or in parallel. Connected. When the second operating handle is moved to a predetermined notch position, multiple cam contactors in the main controller are turned on and off via the camshaft, and the resistance value of the resistor for controlling the armature current of the main motor is changes.

When the first and second operating handles of the main controller are operated to perform speed control, the pattern signal output circuit outputs a speed control pattern signal corresponding to each notch position where the first operating handle is located, and outputs a phase command. The signal output circuit outputs a field chopper phase command signal to the field chopper controller based on this speed control pattern signal.

The field chopper controller adjusts the field current in the shunt field winding of the traction motor based on the field chopper phase command signal.

As a result, coasting control of the main motor is performed, and coasting control is performed with the main circuit breaker closed.

When performing power running control again after coasting control, the detection circuit detects the notch position of the first operating handle and the position of the camshaft, and the discrimination circuit controls the main motor to coast based on the detection signal from this detection circuit. Determine whether it is in the state or not. The repowering pattern signal output circuit outputs a repowering speed control pattern signal based on the determination signal from the determination circuit.

(Example) Hereinafter, an example of the present invention will be described based on FIG. 1. However, the same components as those in FIG. 4 are given the same reference numerals and redundant explanations will be omitted.

In FIG. 1, the discrimination circuit 33 is composed of an OR gate 34, a NOR gate 35, and AND gates 36, 37, and 38, and is configured to receive a detection signal from a detection circuit 46.

A pattern signal output circuit 39 corresponding to the pattern signal output circuit 27 in FIG. 4 includes a changeover switch 4 for outputting a full field control pattern signal or a field weakening control pattern signal.
0 and normally closed contacts 41,42. The repowering pattern signal output circuit 43 has normally open contacts 44 and 45 for outputting a series stage field strengthening control pattern signal or a parallel stage field strengthening control pattern signal.

Next, the operation of this embodiment configured as described above will be explained. First, in order to start the traction motor, when the first operation handle of the main controller is advanced one notch in series, the circuit breaker 2 and the electromagnetic contactor 12 in FIG. 3 are closed, and the two traction motors are connected in series. .

Then, a serial one-notch command signal is output to the OR gate 34 in the discrimination circuit 33 shown in FIG. 1, and the OR gate 34 outputs an H signal to one input terminal of the AND gate 36. At this time, the NOR gate 35 also outputs an H signal, and the AND gate 36 outputs an H signal, but since coasting control is not yet performed, the camshaft in the main controller is naturally located at the final stage. Therefore, AND gates 37 and 38 output L signals. Therefore, contacts 41,42 remain closed as shown. Also, since the series 1-notch command signal is output, naturally the series 2-notch command signal, the parallel 2-notch command signal, and the parallel 3-notch command signal are not output, and the output signal of the OR gate 26 is an L signal. be. Therefore, the changeover switch 40 is connected to the entire field control pattern side as shown in the figure, and the pattern signal output circuit 3
A total field control pattern signal is output from 9.

This total field control pattern signal is sent to the multiplier 31 of the phase command signal output circuit 30 and multiplied by the armature current signal, and further, the adder 32 combines the output signal of the multiplier 31 with the shunt field current signal. The difference is calculated and output as a field chopper phase command signal to the field chopper controller 21 in FIG. 3.

The field chopper controller 21 controls the shunt field current flowing through the shunt field windings 19 and 20 based on this field chopper phase command signal, and controls the traction motor to the A characteristic shown in FIG. .

Next, move the first operating handle from the series 1 notch to the series 2 notch.
When the notch position of the second operating handle is gradually advanced until the main resistors 15 and 16 are short-circuited,
That is, until the position of the camshaft in the main controller reaches the final stage in series, the OR gate 26 in FIG. 1 outputs an L signal, so the pattern signal output circuit 39 outputs a total field control pattern signal, and the main motor It is controlled to have characteristic B shown in FIG. However, when the main resistors 15 and 16 are short-circuited and the camshaft reaches the final stage in series, the AND gate 25 goes high.
The OR gate 26 also outputs an H signal. Therefore, the changeover switch 40 is connected to the field weakening control pattern side, and the pattern signal output circuit 39 outputs the field weakening control pattern signal to the phase command signal output circuit 30.

As a result, the main motor is controlled to have the characteristic C shown in FIG.

Next, when the first operation handle of the master controller is moved from the series 2 notch to the notch-off position, the traction motor is switched off by the field chopper controller 21 while the main circuit connection remains in the same state as the series 2 notch. The armature current is controlled to be zero, and coasting control is performed.

Assume that after such coasting control, the first operation handle is moved from the notch-off position to the in-line one-notch position again in order to perform power running again. Then, in FIG. 1, since the OR gate 34 and the NOR gate 35 output an H signal, the AND gate 36 outputs an H signal. Further, since the camshaft in the main controller is located at the final stage in the series, the AND gate 38 outputs an H signal when the AND condition is met.

The H signal from the AND gate 38 turns on the contact 45 (the contact 42 turns off), and the repowering pattern signal output circuit 43 outputs the series stage strengthening field control pattern signal to the phase command signal output circuit 30.

As a result, the main electric motor is controlled based on the B1 characteristic in FIG. 5 instead of the B characteristic as in the conventional case.

That is, since control is performed using the B1 characteristic, which is closer to the A characteristic than the B characteristic, it is possible to suppress deviations in the control characteristics that occur when power running control is performed again after coasting control in the case of one notch in series, and therefore, It is possible to suppress deviations in driving sensation.

In the above explanation, the case where the first operation handle of the master controller was moved in the order of 1 notch in series, 2 notches in series, notch off, and 1 notch in series was explained. Notch, notch off, parallel 1
Even if you move the first operating handle in the order of notches, etc.
works similarly.

In this case, in FIG. 5, power control is performed based on the D1 characteristic instead of the conventional D characteristic.

〔Effect of the invention〕

As described above, according to the present invention, when the main motor is subjected to coasting control and then powering control again using the first operation handle of the main controller, the detection circuit detects the notch position and the camshaft position and makes a discrimination. The circuit determines whether the main motor is in the coasting control state based on the determination signal from this detection circuit, and the repowering pattern signal output circuit determines the repowering speed control pattern based on the determination signal from this determination circuit. Since the configuration is configured to output a signal, it is possible to suppress deviations in control characteristics that occur when power running control is performed again after coasting control with respect to the same notch position of the main controller, and it is possible to improve drivability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main parts of an embodiment of the present invention, and FIG.
Figure 3 is a circuit diagram showing the main circuit configuration of a resistance-controlled electric car, Figure 3 is a circuit diagram showing the main circuit configuration of a field-controlled electric car, Figure 4 is a block diagram showing the main parts of the conventional example, and Figure 5 is FIG. 3 is a characteristic diagram showing control characteristics regarding an example of the invention and a conventional example. 2... Main circuit breaker, 4.8... Main motor armature, 12... Contactor for DC operation, 13.14... Contactor for parallel operation, 19.20... minutes Winding field winding, 21.
... Field chopper controller, 30... Phase command signal output circuit, 33... Discrimination circuit, 39... Pattern signal output circuit, 43... Repowering pattern signal output circuit, 46... Detection circuit.

Claims (1)

[Scope of Claims] A main circuit breaker that supplies or interrupts DC power from an overhead line, a plurality of main motors connected to the main circuit breaker, and a series operation connected between the plurality of main motors. a main circuit having a contactor for parallel operation and a contactor for parallel operation; a camshaft for driving a plurality of cam contactors connected to the armature current control resistor of each of the main motors; and a predetermined notch of the main controller. a first operation handle that controls the series operation contactor or the parallel operation contactor to connect the plurality of main motors in series or in parallel by being located at a position; and the plurality of cam contactors. a second operating handle that changes the resistance value of the armature current control resistor by performing on/off control via the camshaft; and a speed control pattern corresponding to the notch position where the first operating handle is located. a pattern signal output circuit that outputs a signal; a phase command signal output circuit that outputs a field chopper phase command signal based on the speed control pattern signal from the pattern signal output circuit; and a field command signal output circuit that outputs a field chopper phase command signal based on the speed control pattern signal from the pattern signal output circuit; a field chopper controller that adjusts a field current in a shunt field winding of the main motor based on a chopper phase command signal; a notch position where the first operating handle is located; and a position of the camshaft; a determination circuit that determines whether or not the main motor is in a coasting control state based on a detection signal from the detection circuit; A field control electric vehicle control device comprising: a repowering pattern signal output circuit that outputs a repowering speed control pattern signal to a command signal output circuit.