Electric vehicle with combined motors of multistep power outputs
US6105696A · kind A · utility
Inventor
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An energy-saving and high-efficiency electric vehicle which uses a set of accumulator batteries as a power source and is driven by multiple motors of different powers, each motor having its own circuit system and switching device. When greater resistance is encountered by the vehicle, such as when it starts or is going uphill, the large and small power motors are actuated simultaneously to provide a resultant force. After starting, when inertial force increases and resistance relatively decreases, the small power motor alone can be actuated, but the maximum r.p.m. it can impart to the driving shaft should be higher than that imparted by the large power motor. In this way it is possible to save energy, thereby lengthening the time and distance of continuous travel of the vehicle. At the same time, the vehicle is of lower cost, is convenient to drive, and does not pollute the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.