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US 8,508,067 B2Granted
Motor drive system for hybrid vehicle and method for controlling the same in the event of failure
AssigneeHyundai Motor Company
InventorsHong Seok Song, Ki Jong Lee, Ki Young Jang, Shin Hye Chun, Won Kyoung Choi, Hyong Joon Park, Jin Hwan Jung, Jung Hong Joo
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Abstract
The present invention provides a motor drive system for a hybrid vehicle and a method for controlling the same in the event of a failure in a voltage converter, in which high voltage stored in a DC-link capacitor is discharged to a 12V electrical load through a DC-DC converter, of which the output voltage is increased.
Claims2
A motor drive system for a hybrid vehicle, the system comprising:
- first and second motors that drive the vehicle;
- first and second inverters connected to the first and second motors, respectively, to drive the first and second motors, respectively;
- a DC battery outputting a DC voltage;
- a voltage converter selectively boosting or lowering the DC voltage from the DC battery and supplying the resulting voltage to the first and second inverters, selectively boosting or lowering the DC voltage from the first and second inverters, and supplying the resulting voltage to the DC battery;
- relay(s) connected between the DC battery and the voltage converter;
- a DC-DC converter connected between the first and second inverters to discharge a high voltage of a DC-link capacitor that is connected between the voltage converter and the first and second inverters;
- and
- an electrical load connected directly to the DC-DC converter, the electrical load being driven by a 12V auxiliary battery.
5 more elements
Dependencies are inferred from the claim text.