Synchronous motor control system for electric vehicle
US5583411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1993 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Aug 4, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A synchronous motor control system controls a synchronous motor on an electric vehicle for propelling the electric vehicle in a propulsive mode or regenerating electric energy in a regenerative model. The synchronous motor control system has a rotational speed sensor for detecting a rotational speed of the synchronous motor, an accelerator for producing a torque command signal, and a driver connected between a battery on the electric vehicle and the synchronous motor for operating the synchronous motor in either the propulsive mode or the regenerative mode. A controller is responsive to the rotational speed detected by the rotational speed sensor and the torque command signal produced by the accelerator for controlling the driver to operate the synchronous motor in either the propulsive mode or the regenerative mode. The controller has maps for storing lead and lag values which are selectively readable to control the driver to operate the synchronous motor with a maximum efficiency based on two parameters of operation of the electric vehicle, namely, the rotational speed of the motor and the torque command from the accelerator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.