Engine-driven power generating system with over-current protection and stator teeth with grooves on a top surface
US5257174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An engine-driven power generating system having a bridge circuit section in which low-frequency switching elements are driven alternately by low-frequency drive signals, and high-frequency switching elements driven by high-frequency drive signals during the ON period of the low-frequency switching elements are connected in a bridge network, and an inverter circuit section having a drive signal supply circuit for supplying low-frequency and high-frequency drive signals are each supplied to the low-frequency and high-frequency switching elements that form a pair; the a-c voltage generated by an engine-driven a-c generator is converted into d-c voltage that is in turn converted into a predetermined level of low-frequency a-c voltage; characterized in that an overcurrent detecting circuit for detecting an overcurrent flowing in the bridge circuit section at a level higher than a predetermined level, a drive-signal control circuit that outputs to a drive-signal supply circuit, when the overcurrent detecting circuit detects an overcurrent during a half-cycle of the low-frequency signal in which the low-frequency switching element is turned on, a signal which turns off at least any one of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.