Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1995-03-01
1996-09-03
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363132, H02M 324, H02M 75387
Patent
active
055529801
ABSTRACT:
A control device for a multi-phase inverter is connected to a power supply source through a DC circuit and controlled in pulse width modulation by a control circuit (20), including several pairs of static switches installed in parallel with free wheel diodes, the mid-point of each pair being connected to a load; switching is done by comparison in said control circuit between an input signal defined by control voltages that are a function of simple voltage set values and a triangular carrier wave output by a triangular wave generator. The device uses a constant switching frequency and a parameter other than the frequency of the carrier wave, the value of which varies in a random manner in order to obtain after switching the simple voltage set values between the phases and the neutral of the load.
REFERENCES:
patent: 5214575 (1993-05-01), Sugishima et al.
patent: 5367240 (1994-11-01), Schroder-Brumloop
patent: 5373195 (1994-12-01), De Doncker et al.
patent: 5373436 (1994-12-01), Yamaguchi et al.
"Slope Modulation in Inverter Circuits" in Conference Record of the 1989 IEEE Industry Applications Society Annual Meeting, Part I. Papers Presented at the 1989 Industry Applications Conference; Twenty-Fourt IAS Annual Meeting, Hotel del Coronado, San Diego, California; Oct. 1-5, 1989. By John C. Salmon and Daniel Hagan. pp. 760-766. IEEE Catalog No. 89CH2792-0.
Garces Luis
N'Guyen Phuoc Vinh T.
Nguyen Matthew V.
Schneider Electric SA
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