Asymmetrical bridge inverter circuit for driving a switched relu

Electric power conversion systems – Current conversion – Using semiconductor-type converter

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363 98, H02M 75387

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active

057711666

ABSTRACT:
An inverter circuit for a switched reluctance motor (SRM) includes a lower switching transistor connected to a corresponding lower negative pole of a filter condenser and switched in accordance with a control signal outputted from a control circuit, an upper switching transistor connected to a corresponding upper positive pole of the filter condenser and switched in accordance with a switching operation of the lower switching transistor, resistances for dividing the voltage of a DC link when the lower switching transistor is turned on, a condenser for controlling a gate voltage of the upper switching transistor in accordance with the voltage divided by the resistances, and a coil for operating a motor in accordance with a switching operation of the upper and lower switching transistors. The circuit operates in accordance with a switching operation of the lower switching transistor by replacing with a simplified passive component a voltage isolating device and a gate driver of a conventional circuit.

REFERENCES:
patent: 4535275 (1985-08-01), Damiano et al.
patent: 4616305 (1986-10-01), Muller

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