JPS5932961B2 - Method for preventing instantaneous power outage of service power supply for passenger cars in insulation section of electric cars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing momentary power outages of a passenger car service power supply in an insulated section of an electric car.

For electric cars, power from the overhead contact line is connected to a pantograph, a main transformer, and 2
Electricity is supplied to the main drive motor through the secondary winding and main rectifier to obtain vehicle driving power; There is a type that is used as a service power source for equipment, etc.

On the other hand, when the substations that supply power to adjacent overhead contact lines are different, there are usually differences in the voltage and phase of the power, so there are problems caused by electrically connecting them. Insulating sections are provided between the contact lines to avoid this.

The same applies to the case of transitioning from an AC overhead contact line to a DC overhead contact line, or vice versa.

When the overhead contact line passes through an insulated section, the pantograph becomes unpressurized and the input to the drive motor and stationary inverter is instantaneously cut off, especially when the latter causes passenger car lights to turn off, etc., thereby reducing passenger service. The decline cannot be ignored.

The present invention has been made in order to solve the above-mentioned problems regarding electric cars that use static inverters as power sources for passenger car services.

The present invention will be explained according to the embodiments shown in the drawings.

1 is the overhead contact line, 2 is the insulation section, 3 is the pantograph,
4 is a main transformer, 42 is a secondary winding, 43 is a tertiary winding, 8 is a main rectifier, 9 is a drive motor, 5 is a static inverter for auxiliary power supply, and 6 is a converter for auxiliary power supply. The structure is similar to that of a known electric vehicle of this type.

In such a configuration, the present invention includes a non-pressure detection device 7 that detects non-pressure of the pantograph 3 and a contact lL12 of the switching electromagnetic contactor 10 that operates based on the non-pressure detection of the non-pressure detection device 7. It is inserted between the input side of the drive motor 9 and the input side of the static inverter 5.

As shown in the figure, the no-pressure detection device 7 may be configured to be able to detect the voltage on the input side of the static inverter 5, for example, and may detect no induced voltage as no pressure. Alternatively, the insulating section may be directly sensed by an antenna.

In such a configuration, when the electric car is running along the overhead contact line 1 (not in an insulated section), the non-pressurization detection device 7 detects pressurization, and thereby the switching magnetic contactor 10
maintains its operation, and contacts 11 and 12 are tilted toward the dotted line side.

Therefore, the power of overhead contact line 1 is transferred to pantograph 3, main transformer 4,
The vehicle drive power is supplied to the drive motor 9 via the secondary winding 42 and the main rectifier 8, and the tertiary winding 4
3. Power is supplied to the passenger car's lighting system, air conditioning system, etc. via the static inverter 5 and converter 6.

As shown in the figure, if the electric car is inserted into the insulation section 2,
Then, the no-pressure detection device 1 detects no pressurization of the overhead contact line, thereby switching the contacts 11 and 12 of the switching electromagnetic contactor 10 to the solid line side (inverter input side) and switching the drive motor 8 to the generator. By operating the pantograph as a power supply and supplying its output to the input side of the static inverter, instantaneous power outages of the passenger car service power supply will not occur due to no pressurization of the pantograph.

When the overhead contact line passes through the insulating section 2, the no-pressure detection device 7 detects the pressurization, and the contacts 11 and 12 switch to the dotted line side to return to the state before the contact line passed through the insulating section 2.

According to the present invention, the above-mentioned problems that occur when an electric vehicle of this type passes through an insulating section can be effectively solved using a simple mechanism.

[Brief explanation of drawings]

The figure is a circuit diagram showing an embodiment of the present invention. 3...Electric car pantograph, 5...
Static inverter, 9...Electric vehicle drive motor, 10...Switching electromagnetic contactor.

Claims (1)

[Scope of Claims] 1. A switching electromagnetic contactor is inserted between an electric car drive electric motor and a static inverter that is a service auxiliary power source for passenger cars, and the electromagnetic A method for preventing instantaneous power outage of a service power supply for a passenger car in an insulated section of an electric car, characterized by activating a contactor to operate the electric car drive motor as a generator, and inputting its output to the static inverter. .