Electricity: motive power systems – Battery-fed motor systems
Patent
1998-12-15
2000-05-23
Sircus, Brian
Electricity: motive power systems
Battery-fed motor systems
318439, 180 658, H02P 100, B60K 100
Patent
active
060669284
ABSTRACT:
An electric system for an electric vehicle includes a voltage type inverter that receives dc input voltage from a dc input circuit, and generates variable ac voltage of a variable frequency, and an ac motor including a plurality of windings each of which has one end connected to an ac output terminal of the voltage type inverter, the other ends of the windings being connected together to provide a neutral point of motor windings. A variable-voltage energy storage element is connected between the neutral point and a connecting point provided in the dc input circuit, and an on-vehicle dc power supply is connected to the opposite ends of the energy storage element or input terminals of the dc input circuit. The inverter performs switching operations in a zero-voltage vector mode, to operate as a chopper, so that power is transferred between the variable-voltage energy storage element, and the dc input side of the inverter.
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Fujita Koetsu
Ito Jun-ichi
Kinoshita Shigenori
Fuji Electric & Co., Ltd.
Sircus Brian
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