Driving system for electric vehicles having a plurality of batteries
First Claim
1. A driving system for electric vehicles having a vehicle drive motor and accessory devices comprising:
- a main battery for supplying the vehicle drive motor with an electric power through high voltage power lines;
an accessory battery for supplying the accessory devices with an electric power which has a lower voltage than the electric power of the main battery through low voltage power lines;
a three-phase inverter circuit including switching devices and connected to receive the electric power from the main battery and to supply three-phase alternating current voltages to the vehicle drive motor; and
a driver circuit for switching on and off the switching devices of the three-phase inverter circuit, the driver circuit being connected to receive the electric power of the main battery.
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Accused Products
Abstract
In a driving system for vehicles having a high voltage main battery for a vehicle drive motor and a low voltage accessory battery for accessory devices such as a radio receiver, a three-phase inverter circuit for driving the vehicle drive motor and a DC-DC converter are connected to the main battery through electromagnetically shielded high voltage power lines. The DC-DC converter supplies a low voltage electric power to a driver circuit for switching on and off the inverter circuit. Switching noise voltages caused by switching operations in the inverter circuit, the driver circuit and the DC-DC converter are restricted from being superimposed on low voltage power lines connecting the accessory battery to the accessory devices.
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Citations
6 Claims
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1. A driving system for electric vehicles having a vehicle drive motor and accessory devices comprising:
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a main battery for supplying the vehicle drive motor with an electric power through high voltage power lines; an accessory battery for supplying the accessory devices with an electric power which has a lower voltage than the electric power of the main battery through low voltage power lines; a three-phase inverter circuit including switching devices and connected to receive the electric power from the main battery and to supply three-phase alternating current voltages to the vehicle drive motor; and a driver circuit for switching on and off the switching devices of the three-phase inverter circuit, the driver circuit being connected to receive the electric power of the main battery. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification