Electric car control device

Abstract

[PROBLEMS] To provide an electric car control apparatus capable of consuming a regenerative energy of a DC feeding circuit without providing any electric double layer capacitor or any brake chopper for the DC feeding circuit. [MEANS FOR SOLVING PROBLEMS] An electric car control apparatus has an AC electric motor for driving the electric car and also has a voltage-variable, frequency-variable inverter for controlling the AC electric motor. The electric car control apparatus further has an auxiliary power supply apparatus connected to a DC feeding circuit and still further has a load control means for controlling a load connected to the auxiliary power supply apparatus.; The load control means receives, from the voltage-variable, frequency-variable inverter, an inverter status signal representative of an operating status thereof and controls the load in accordance with the inverter status signal. Moreover, the electric car control apparatus has a detecting means for detecting DC feeding information representative of a DC feeding status of the DC feeding circuit. The load control means controls the load in accordance with the DC feeding information.

Description

technical field [0001] The present invention relates to a control device for an electric vehicle which uses an AC motor as a drive source and uses a variable voltage variable frequency inverter to control the AC motor. Background technique [0002] The electric vehicle performs electric braking by regenerative braking during normal braking, converts the inertial energy of the vehicle into electrical energy, and returns the regenerative energy to the overhead line, that is, the DC power supply line. Indispensable in this regenerative braking is that the DC power supply line side has a regenerative capability, or that there is another electric vehicle running under power as a regenerative load on the DC power supply line side. [0003] Here, when the regenerative power of the electric car in the regenerative braking state is greater than the power consumed by the electric car in the power running state, the overhead line voltage or the voltage of the filter capacitor installed...

AI Technical Summary

Problems solved by technology

[0009] As mentioned above, in the conventional electric vehicle control device, in order to avoid the wear of the brake pads and effectively use the regenerative energy, it is known to install a brake chopper or use an electric double layer capacitor capable of storing regenerative energy. method, but it is necessary to add a brake chopper or an electric double-layer capacitor, so the problem of increasing the size of the control device and increasing the production cost

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