Electrically powered vehicle mounting electric motor and control method therefor
US7443116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Mar 17, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A normal map determines a carrier frequency used for switching control of an inverter controlling driving of a motor generator, in accordance with the state of operation of the motor generator in a normal operation. In a stall state in which the driver is pressing both the accelerator pedal and the brake pedal, the switching frequency is determined using an element protection map, in place of the normal map. When the element protection map is used, in the state of operation corresponding to the stall state, the carrier frequency is set to a protection frequency lower than a normal frequency. Therefore, in an electric vehicle having an electric motor (motor generator) as a driving source for the vehicle, it becomes possible to avoid temperature increase of a power semiconductor device forming an electric power converter for controlling driving of the electric motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.