Voltage inverter
US4920470A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter circuit includes a transformer having a primary winding with a first end adapted to be connected to a d.c. source, a switch connecting the other end of the primary winding to a reference potential, a secondary winding coupled to the primary winding, a rectifier for rectifying the output of the secondary winding, and a bridge switch circuit connected to invert the rectified secondary winding voltage to produce an a.c. output voltage. The inverter circuit further includes a first control circuit for producing a first pulse train of pulses having a first given frequency and a pulse width responsive to the rectified output voltage of the secondary winding, and a circuit for applying the pulse train to the switch for controlling the switch to open and close at the given frequency. The inverter circuit further includes a second control circuit for producing a second pulse train or pulses of a second given frequency and constant pulse width, and a control arrangement for controlling the bridge switch circuit with the second pulse train of pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.