SCR motor voltage controller
US3938015A · kind A · utility
6Cited by
5References
10Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Apr 5, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage control circuit for a motor, such as a vehicle motor, energized from a battery. The circuit utilizes a commutating capacitor and a main pass SCR, and includes a separate capacitor charging circuit which always charges the capacitor to twice the unloaded battery voltage, the capacitor being charged whether or not the main pass SCR is on. The circuit operates at a fixed pulse frequency and has a manually operable potentiometer which controls the pulse width, whereby the effective DC voltage output to the motor is correspondingly controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.