Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1989-11-21
1991-09-10
Stephan, Steven L.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 17, 363132, H02M 75387
Patent
active
050479148
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 freewheeling diode parallel with the switch being turned on.
REFERENCES:
patent: 4502106 (1985-02-01), Glennon
patent: 4507724 (1985-03-01), Glennon
patent: 4541041 (1985-09-01), Park et al.
patent: 4670832 (1987-07-01), Park
patent: 4672528 (1987-07-01), Park et al.
patent: 4675799 (1987-06-01), Suzuki et al.
patent: 4816984 (1989-03-01), Porst et al.
IEEE Transactions on Industrial Electronics and Control Instrumentation, vol. EICI-27, No. 2, May 1980.
Dhyanchand John J.
Nguyen Vietson M.
Stephan Steven L.
Sundstrand Corporation
Todd Voeltz Emanuel
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