JPH04208006A - Electric vehicle provided with main motor controller - Google Patents

Abstract

PURPOSE:To facilitate isolation of faulty circuit by providing a remote controller for opening an arbitrary motor group on a driving cab in an electric vehicle in which a plurality of motor groups connected in series with line breakers are fed power in parallel from a current collector. CONSTITUTION:AC voltage is taken in from a stringing through a current collector 1 and fed through a main circuit breaker MCB to a main transformer MT thence to a converter MR to produce a DC voltage which is then fed through line breakers L1, L2 to a plurality (two in drawing) of power units. Each power unit comprises line breakers L3, L5 and L4, L6, main motors M1, M2 and M3, M4, field windings MF1, MF2 and MF3, MF4 and reversers RV1, RV2 and RV3, RV4 connected in series. A remote controller (not shown) is mounted on a driving cab in order to operate the line breakers and the reversers thus regulating current flowing through field winding. According to the constitution, faulty main motor and power unit can be released easily.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric vehicle having a traction motor control device equipped with a plurality of traction motors, and in particular, to remotely release any of the traction motors from a driver's cab or the like. The present invention relates to a device characterized in that it operates.

[Conventional technology]

In an electric vehicle having a traction motor control device including a plurality of traction motors, a conventional method for operating any of the traction motors in open mode will be described with reference to FIG.

In Fig. 4, 1 is a current collector, MCB is a main breaker,
MT is the main transformer, MR is the converter, L1-L4 are the current breakers, Rv1-Rv4 are the reversers, M1-M4 are Ml and M3
, M3 and M4 are each a group of traction motors, MF-MF4 are the field windings of traction motors M-M, respectively, MC0
81 and MCO5 are main motor openers, which are connected as shown in FIG.

It is now assumed that the electric vehicle is being operated with the main circuit breakers [MCB, current circuit breakers L1 to main motor openers MC0S and MC082] being closed. For example, if an electric car breaks down, the group of main motors M1 and M2 or M3 and M4 in Figure 4
When it becomes necessary to open a group of motors, conventionally the main motor opener MC051 or MCO5 is opened.

However, the main motor opener MCO5□ or MCoS2 has conventionally been installed under the floor of an electric vehicle, and these have been manually operated.

For this reason, the driver of the electric car had to get out of the driver's cab and operate the electric car from outside, which was very inconvenient. This kind of conventional method is shown, for example, in the December 1988 issue of "Electric Vehicle Science J, pages 50-53.

[Problems to be solved by the invention] The present invention has been made to solve the above-mentioned problems.
An object of the present invention is to provide a device that allows any traction motor or any unit including any traction motor to be controlled remotely from the driver's cab in an electric vehicle having a plurality of traction motors.

[Means for solving problems]

In order to achieve the above object, the present invention is configured to open any main motor and power unit based on a remote control command from the driver's cab.

Further, the main motor in any power unit is configured to be provided with means for switching a plurality of current breakers inserted in series thereto so as to simultaneously open them.

(Function) In the present invention, since any main motor and power unit are opened based on a remote control command from the driver's cab, the main motor located outside the electric vehicle can be easily opened.

Further, the present invention is provided with means for switching to simultaneously open a plurality of current breakers inserted in series in the main motor, so that when a transient voltage is applied, each current breaker is This means that withstand pressure can be reduced, and operations can be performed from the driver's cab with high reliability.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows an embodiment of the main circuit in an electric vehicle of the present invention, and the same parts as in Fig. 4 are shown with the same reference numerals.
The difference is that current interrupter 6, L is used instead of MC052.

FIG. 2 shows an embodiment of the control device of the present invention for controlling the main circuit shown in FIG. In FIG. 2, 11 is a switch for selecting a unit to be opened, and 12 is a selection switch for selecting a condition for opening the main motor.

FIG. 3 shows a relay circuit operated by the control device shown in FIG. 1 to open and close current breakers L to L6 in the main circuit. In FIG. 3, LC□ to LC are operating coils of the current breakers L1 to L6, and when a voltage is applied to these coils, the current breakers -yL in FIG. 1 are closed.

14a is a normally open contact 1.14b of the relay 14 shown in FIG.
Similarly, 15a is a normally closed contact of the relay 14, 15b is a normally closed contact of the relay 15, La3, L
a is an interlocking contact point of the current interrupters L3 and LG.

Now, a case will be described in which the first group side of the main motors M1 and M2 in FIG. 1 is opened due to a failure or the like.

When the unit selection switch 11 in FIG. 2 is set to the "]U" position, the interlocking contact 111 is closed.

Power is supplied to the circuit 51 and the relay]-3 is excited. Next, when the open switch 12 is set to the "1 group open" position, the interlocking contact 121 is closed, power is supplied to the circuit 61, and relay ]-4 is energized. The relay 14 is self-maintained with interlocking contacts] and 4a. As a result, the interlocking contacts 1-4b of the relay 14 are opened by the relay circuit shown in FIG.
The circuit breakers contacts L53 and L5 in the figure open. As a result, the main motors M1 and M7 could be disconnected from the circuit.

Next, when opening the second group side of the main motors M1 and M4 in FIG. 1, use the unit selection switch in FIG. 2].

]. remains at the "IU" position. When the open switch 12 is set to the "2nd group open" position in this state, the interlocking contact 122 is closed and the contact 121 is opened. Contact 122
Power is supplied to the circuit 62 via the circuit 62, and the relay 15 is excited. The relay 15 is self-maintained by interlocking contacts 15a. As a result, the interlocking contact 15b opens in FIG.
The circuit breaker contact shown in the figure and L6 open.

As a result, main motors M3 and M4 could be disconnected from the circuit.

Furthermore, a case will be described in which both the first and second groups in FIG. 1 are opened at the same time, and all of the power unit main motors M, to M4 are opened (that is, the units are opened). The unit selection switch ]-1 in FIG. 2 remains in the "]U" position. When the open switch 12 is set to the "unit open" position in this state, the interlocking contact 123 closes, and the contact] 21.122
and 124 are opened. Power is supplied to circuit 63 via contact 123, and relays 14 and 15 are energized together via diodes 2 and 22.

Hereinafter, all of the main motors M1 to M4 could be disconnected from the circuit in the same manner as described above.

When returning to the original state (resetting) after opening the main motor, the unit selection switch 11 remains in the "IU" position and the release switch 12 is placed in the "open reset" position.

As a result, the interlocking contact 124 is closed, and the contacts 121 to 12
3 is open circuit. Power is supplied to the circuit 64 through the contact] 24, the relay 16 is energized, and the self-holding circuit of the relays 14 and 15 is opened by the interlocking contact 16b, so that the relays 14 and 15 are demagnetized. When the relays 14 and 15 are demagnetized, the interlocking contacts 14b and 1.5b shown in FIG. is closed.

In this way, we were able to restore the main motor to its original state.

Normally, an electric car has multiple such units connected, but any unit and any traction motor of that unit can be easily selectively controlled by remote control from the driver's cab in the same way as described above. Needless to say, Ako.

[Effects of the Invention] In the present invention, any external main motor and power unit can be easily opened based on a remote control command from the driver's cab.

Moreover, since the present invention can reduce the withstand pressure shared by each of the flow breakers, it is possible to perform remote control operations from the driver's cab with high reliability.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the main circuit of an electric vehicle according to the present invention, FIG. 2 is a diagram showing an embodiment of a control device for controlling the main circuit of FIG. 1 according to the present invention, and FIG. FIG. 4 is a diagram showing an embodiment of a relay circuit operated by the control device shown in FIG. 1 to open and close the main circuit shown in FIG. 1 in the present invention, and FIG. . 1... Current collector, MCB... Main breaking device MT... Main transformer, MR... Converter L□~L6... Current interrupter, RV, ~RV,...
Reverser M-M4... Main motor MF2-MF,... Field winding M of main motor M1-M4
CO8,, MCO8,...Main motor opener 11...
・Unit selection switch 12 ... Open switches 111 to 113 ... Interlocking contact 12 of selection switch 11
1 to 124... Interlocking contacts 13 to 1 of the open switch 12
6... Relays 13a to 16a... Normally open interlocking contacts 13b to 1 of the relays
6b... Normally closed interlocking contact of relay amount L□~L5... Breaker

Claims (1)

[Scope of Claims] 1. A plurality of main motors, a current interrupter connected to both terminals of the main motors, and a current collector for supplying power to the main motors via the current interrupters; A traction motor control device for controlling an electric vehicle, wherein the control device remotely controls any of the traction motors in a driver's cab of the electric vehicle. Electric car with. 2. An electric vehicle having a traction motor control device according to claim 1, wherein the control device simultaneously opens and closes a current breaker connected to both terminals of the traction motor. 3. A current collector comprising a plurality of power units each including a main motor and a current interrupter connected to both terminals of the main motor, and supplying power to the main motor via the current interrupter; The electric vehicle is characterized in that the electric vehicle has a control device that controls a flow interrupter, and the control device remotely controls any of the main motors in any of the power units in the driver's cab of the electric vehicle. An electric vehicle with a traction motor control device. 4. An electric vehicle having a traction motor control device according to claim 3, wherein the control device simultaneously opens and closes a current breaker connected to both terminals of the traction motor.