DC Motor control system
US4453115A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Jul 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/93
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a motor control system of the present invention, a series circuit comprising a current sensing resistor, a DC motor and a power transistor, is connected between the output terminals of a DC power source; and a diode and a capacitor are connected to the series circuit. The diode is connected in parallel to the current sensing resistor and the DC motor, so that energy stored in the motor, corresponding to a drive current of the motor, is discharged through the current sensing resistor. The capacitor is connected in parallel to the DC motor and power transistor, so as to increase the power supplied to the motor when the load of the motor is momentarily increased. The current limiting circuit of the invention, enables the power supplied to the motor to be continued to be supplied when a momentary overload occurs, and to cause a limitation of the power supplied to the motor when the overload is for a longer period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.