Electric vehicle control device
First Claim
1. An electric vehicle control device comprising:
- a main circuit for supplying power from a d.c. power supply to a driving motor through a chopper;
a phase shifter for controlling the conduction ratio of said chopper in such a manner that a current flowing through said driving motor is proportional to an instruction value, said instruction value being determined by how much an accelerator pedal is trodden;
means for instructing a regenerative braking operation;
changeover means for changing over said main circuit between a power running state and a regenerative braking state;
conduction-ratio detecting means for detecting that the conduction ratio of said chopper in said power running state exceeds a preset value, to deliver an output while the conduction ratio exceeds the preset value;
holding means for holding and delivering said output of said conduction-ratio detecting means for a predetermined time; and
means for placing said changeover means on the regenerative braking side in response to the presence of both of the output of said holding means and the output of said means for instructing said regenerative braking operation.
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Accused Products
Abstract
An electric vehicle control device is disclosed which includes a main circuit for supplying power from a d.c. power supply to a driving motor through a chopper, a phase shifter for controlling the conduction ratio of the chopper in such a manner that a current flowing through the driving motor is proportional to an instruction value determined by how much an accelerator pedal is trodden, a circuit for instructing a regenerative braking operation, and a changeover switch for changing over the main circuit between a power running state and a regenerative braking state. The changeover switch is changed over in the regenerative braking state when another power running state in the direction opposite to the current running direction is instructed in a predetermined time after the stop of a power running state where the chopper had a conduction ratio greater than a preset value.
27 Citations
4 Claims
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1. An electric vehicle control device comprising:
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a main circuit for supplying power from a d.c. power supply to a driving motor through a chopper; a phase shifter for controlling the conduction ratio of said chopper in such a manner that a current flowing through said driving motor is proportional to an instruction value, said instruction value being determined by how much an accelerator pedal is trodden; means for instructing a regenerative braking operation; changeover means for changing over said main circuit between a power running state and a regenerative braking state; conduction-ratio detecting means for detecting that the conduction ratio of said chopper in said power running state exceeds a preset value, to deliver an output while the conduction ratio exceeds the preset value; holding means for holding and delivering said output of said conduction-ratio detecting means for a predetermined time; and means for placing said changeover means on the regenerative braking side in response to the presence of both of the output of said holding means and the output of said means for instructing said regenerative braking operation. - View Dependent Claims (2, 3, 4)
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Specification