JPH0549107A - Controller for electric vehicle - Google Patents

Abstract

PURPOSE:To eliminate adverse influence on human body by reducing flux being generated in an inverter comprising smoothing reactors thereby minimizing flux leakage in an electric vehicle. CONSTITUTION:A distributed inverter is employed and smoothing reactors 9, 10, each split into four sections, are disposed oppositely so that the flux 18 is offset thus suppressing flux leakage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter for an electric vehicle controller mounted on an electric vehicle.

[0002]

2. Description of the Related Art Conventionally, an inverter train drives four induction motors 2 by one inverter device 1 for each electric vehicle. That is, as in the conventional example shown in FIGS. 8 and 9, the current received from the pantograph 3 passes through the disconnector 4 and the smoothing reactor 5 and is converted from DC power to three-phase AC power by the inverter device 1 to generate four induction coils. It is supplied to the electric motor 2 to drive the induction motor 2.

The smoothing reactor 5 connected to the inverter device 1 is hung vertically or horizontally with respect to the floor surface of the vehicle body, and the magnetic flux leaks between it and the vehicle body floor 7 to which the seat 6 is attached. A shielding plate 8 is provided for prevention.

[0004]

When the smoothing reactor is used as in the above circuit configuration, the magnetic flux becomes large, and even if the smoothing reactor is installed under the floor of the vehicle body, the magnetic flux leakage adversely affects passengers on the floor. There is a risk.

As described above, the shield plate is provided between the vehicle body floor and the floor to prevent the leakage flux, but a shield plate having a weight of 2 tons is required.

In view of the above, it is an object of the present invention to provide an inverter device having a structure in which the leakage magnetic flux of a smooth reactor is minimized.

[0007]

In order to achieve the above object, the present invention uses a plurality of inverter devices per electric vehicle as a distributed type, whereby the magnetic fluxes of the plurality of smoothing reactors are offset from each other. It is placed under the floor of the vehicle body with the direction of the magnetic flux reversed.

[0008]

With the above construction, the smoothing reactor is divided into four, the magnetic flux of each smoothing reactor is reduced, and at the same time, the mutual arrangement of the smoothing reactors cancels each other's magnetic flux to minimize the leakage magnetic flux. it can.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in FIGS.

In the distributed inverter control system for one electric vehicle, the DC power received from the pantograph 3 is divided into four smoothing reactors 9, 10 and 1 through the disconnector 4.
1 through 12, 4 inverter devices 13, 14, 1
Converted to three-phase AC at 5 and 16 and each one induction motor 2
A circuit for supplying electric power to.

The smoothing reactors 9, 10, 11, 12 are mounted under the floor 7 of the vehicle body in two rows laterally with respect to the traveling direction 17 of the vehicle. The smooth reactor 9 and the smooth reactor 10, and the smooth reactor 11 and the smooth reactor 12 are arranged close to each other in the lateral direction and face each other in opposite directions.

The smooth reactors 9, 10, 11, 12
As shown in FIG. 4, the smooth reactors 9 and 10 are
And between the smoothing reactors 11 and 12 and in the direction 18 of the magnetic flux that opposes each other in the opposite direction, the magnetic fluxes cancel each other out between the smoothing reactors 9 and 10 and between the smoothing reactors 11 and 12. Magnetic fluxes between the smooth reactors 9 and 11 and between the smooth reactors 10 and 12 can also be canceled.

From the above, the leakage flux is suppressed to a minimum,
It is possible to prevent the passengers on the floor from being adversely affected. Therefore, the size of the shield plate 8 provided between the vehicle body 7 and the vehicle body 7 can be reduced.

As another embodiment of the present invention, shown in FIGS. 5 and 6, the smooth reactors 9, 10 and the smooth reactors 11, 12 are arranged in the longitudinal direction with respect to the traveling direction 17 of the vehicle.
They are arranged in two rows, and the direction of magnetic flux 18 is set to the smooth reactors 9 and 1.
The same effect can be obtained by canceling each other between 0 and the smooth reactors 11 and 12, or canceling between the smooth reactors 9 and 10 and passing currents so as to reciprocate between the smooth reactors 11 and 12. .

In another embodiment shown in FIG. 7, the smoothing reactors 9, 10, 11, 12 are arranged in a row in the longitudinal direction with respect to the traveling direction 17 of the vehicle, and the direction 18 of the magnetic flux is smoothing reactors 9, 10. Current is flowed so that the magnetic fluxes cancel each other and between the smoothing reactors 11 and 12 to suppress the leakage magnetic flux.

[0016]

As described above, according to the present invention, the inverter device and the smoothing reactor are divided into four, the magnetic flux of the smoothing reactor is canceled by each pair, the leakage magnetic flux of the smoothing reactor is suppressed, and the human body of a passenger or the like is suppressed. Can be reduced. Further, the shield plate for preventing the leakage magnetic flux can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of an electric vehicle according to the present invention.

FIG. 2 is a partial configuration plan view of FIG.

FIG. 3 is a configuration diagram of a distributed inverter system according to the present invention.

FIG. 4 is a layout diagram of a smooth reactor according to another embodiment of the present invention.

FIG. 5 is a layout diagram of a smooth reactor according to another embodiment of the present invention.

FIG. 6 is a layout diagram of a smooth reactor according to another embodiment of the present invention.

FIG. 7 is a layout diagram of a smooth reactor according to another embodiment of the present invention.

FIG. 8 is a configuration diagram of a conventional inverter system.

FIG. 9 is a conventional smoothing reactor layout.

[Explanation of symbols]

 1 Inverter device 2 Induction motor 5 Smoothing reactor 8 Shielding plate 9, 10, 11, 12 Split smoothing reactor 13, 14, 15, 16 Split inverter device 17 Vehicle traveling direction 18 Direction of magnetic flux

Claims (1)

[Claims] 1. A circuit comprising a smoothing reactor, an inverter device for converting a DC current into a three-phase AC current, and an induction motor for driving an electric vehicle are connected as one set, and a plurality of the circuits are provided in a single DC power source. In an electric vehicle control device connected in combination, an arbitrary plurality of the plurality of smoothing reactors,
An electric vehicle control device characterized in that the electric vehicle control devices are installed in a combination in which the directions of the magnetic fluxes generated by them are mutually opposite.