Drive circuit for induction motor used in air conditioning system of a railway vehicle
US4024444A · kind A · utility
19Cited by
5References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Jul 14, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/047
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive circuit for an induction motor used in an air conditioning system of a railway vehicle operable from an applied high voltage direct current, which circuit comprises a chopper circuit having its input connected to the high voltage direct current and its output connected to a three-phase variable frequency inverter circuit which, in turn, has its output connected to the induction motor. A voltage feedback is employed to control the current output of the chopper circuit and the frequency of the inverter circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.