Speed control system for DC motor
US4788478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A speed control system for a DC motor is disclosed. This system includes a first transistor connected between a first terminal and a reference terminal, a second transistor connected between a second terminal and the reference terminal, an error amplifier having first input terminal connected via a reference voltage circuit to the first terminal, a second input terminal connected to a third terminal and an output terminal connected to the bases of the first and second transistors, a first resistor connected between a power terminal and the second terminal, a second resistor connected between the first and third terminals, and a third resistor connected between the second and third terminals, and the motor is connected between the first terminal and the power terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.