Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Patent
1998-09-16
1999-08-31
Ro, Bentsu
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
318254, H02P 705
Patent
active
059458011
ABSTRACT:
In a drive circuit for a switched reluctance motor, a DC power supply is provided, a plurality of main circuit switching devices cause branched currents from a current derived from the DC power supply to flow through stator windings of the switched reluctance motor sequentially during their turned on states; a plurality of freewheel diodes are provided, each connected across a corresponding one of the main circuit switching devices in a reverse parallel connection; a plurality of reverse flow blocking diodes are provided, each cathode of which is connected to an output end of the corresponding one of the main circuit switching devices; a resonance purpose capacitor is provided whose one end is connected to a plus terminal of the DC power supply via a resistor and whose other end is connected to an anode of each reverse flow blocking diode; a serial circuit is connected across the resonance purpose capacitor and is constituted by a resonance purpose inductor and a resonance purpose switching device for causing the resonance purpose inductor and capacitor to be resonated when turned on at a time point at which it comes near an end of a turn on interval of time of each main circuit switching device; and a bypass diode is provided whose anode is connected to a minus terminal of the DC power supply and whose cathode is connected to the one end of the resonance purpose capacitor.
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Cho, J. G. et al., "Novel Zero Voltage Transition PWM Multi-phase converters" IEEE 0-7803-3044, Jul. 1996, pp. 500-506.
Oh, S. G. et al., Elecytromagnetic Energy Recovery in SRM System IEEE 0-7803-2775, Jun. 1996, pp. 90-95.
Ashikaga Tadashi
Murai Yoshihiro
Yamada Kenji
Kabushiki Kaisha Meidensha
Ro Bentsu
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