Variable speed three-phase motor drive with two inverter circuits
US6242883A · kind A · utility
18Cited by
22References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 23, 1998 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Feb 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2209/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for driving a three-phase motor from an AC energy source includes a converter connected between the energy source and an inverter. The inverter includes two inverter circuits controlled by a logic circuit. The outputs of the inverter circuits have a phase angle therebetween of 60.degree. and are connected directly to two inputs of the motor. The remaining motor input can be connected to either the first or second line of the energy source. Both the frequency and the magnitude of the voltage waveforms can be varied to control the speed of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.