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AssigneesFuji Electric Co., Ltd., Mitsubishi Heavy Industries, Ltd.
InventorsKatsuhiko Iijima, Shigenori Kinoshita
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Disclosed is a method of controlling an internal combustion engine driven electric vehicle in power operation of the vehicle, in which control is made so that a voltage of a DC intermediate circuit is maintained to a first constant DC voltage in a first speed range of from a zero vehicle speed to a first vehicle speed, the voltage of the DC intermediate circuit is changed in proportion to the vehicle speed in the second speed range of from the first vehicle speed to a second vehicle speed, end the voltage of the DC intermediate circuit is made to be a second constant DC voltage in the third speed range not lower than the second vehicle speed, and control is further made so that an AC output of the second power converter is made to have a variable voltage and a variable frequency in the first and second speed ranges, while the AC output of the second power converter is made to have a constant voltage and a variable frequency in the third speed range.
A method of controlling the operation of a vehicle having an AC generator driven by an internal combustion engine, a first power convertor for converting the AC generator output to a DC voltage, an intermediate DC circuit having an input connected to an output of the first power converter, a second power converter for converting the DC output of the intermediate circuit to an AC voltage, AC induction motors connected to the output of the second power connector for driving the vehicle wheels, and braking resistors in the intermediate DC circuit for consuming power during vehicle braking, said braking resistors being divided into two groups, connected in parallel, with semiconductor switches connected in series with each groups, said method including the step of:
A method of controlling the operation of a vehicle having an AC generator driven by an internal combustion engine, a first power convertor for converting the AC generator output to a DC voltage, an intermediate DC circuit having an input connected to an output of the first power converter, a second power converter for converting the DC output of the intermediate circuit to an AC voltage, AC induction motors connected to the output of the second power connector for driving the vehicle wheels, and braking resistors in the intermediate DC circuit for consuming power during vehicle braking, said braking resistors being divided into two groups, with semiconductor switches connected respectively to each group;
An electric vehicle driven by an internal combustion engine, comprising:
Dependencies are inferred from the claim text.