Current controlled inverter
US5047914A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Nov 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53803
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter (100) in accordance with the present invention for producing an AC output potential from a filter (40) containing an inductance (42) through which current flows to a load (12) in accordance with the invention includes first and second switches (Q1 and Q2) in series between a pair of DC reference potentials with each switch having a conductive and a non-conductive state controlled by control signals applied to control terminals of the switch; first and second freewheeling diodes (46) coupled in parallel respectively between first and second terminals of the first and second switches; a current sensor (38) producing a load current signal proportional to current flowing through the inductance to the load; and a controller (102), responsive to an error signal proportional to a difference between an output voltage produced by the inverter applied to the load and a signal proportional to a desired regulated output voltage of the inverter, a current reference signal varying at a frequency equal to the AC output potential and the load current signal, for producing the control signals applied to the switches which turn on the switches only when current is flowing in the freewhee…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.