Motor drive apparatus including braking means
US5982119A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jan 2, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive apparatus used in a motor for controlling a rotor therein to rotate in regular and reverse directions includes a rotating direction detecting circuit for detecting a first direction in which rotor is rotating. A comparator compares a command signal with a reference signal to detect a second direction in which the rotor should rotate. A motor driver comprised of buffer amplifiers and power supply circuits is provided to rotate the rotor based on the command signal. A command signal generator produces a drive signal which is transferred to the power supply circuits through a switch when the first and second directions are both identical to the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.