AC motor control apparatus
US4581569A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1984 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Jun 29, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/0077
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An AC motor control apparatus having a first arithmetic device (3) which calculates an amplitude command based on a difference between the commanded velocity and the actual velocity of the AC motor (1), and delivers the amplitude command and a current command in at least one phase as outputs. Also included is a second arithmetic device (10) which calculates a pulse width command in each phase from the amplitude command and current command from the first arithmetic device (3) and the actual phase current of the AC motor (1). A timer (11) produces as an output, a pulse-width modulated signal in each phase on the basis of the pulse-width command from the second arithmetic device (10), and an inverter (8) drives the AC motor in accordance with the pulse-width modulated signals from the timer (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.