Polyphase current supplying circuit and driving apparatus

Electricity: motive power systems – Switched reluctance motor commutation control

Reexamination Certificate

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C318S609000

Reexamination Certificate

active

07633249

ABSTRACT:
This invention is to reduce a voltage across a smoothing capacitor in a single-phase capacitorless inverter. A smoothing circuit (15) has a smoothing capacitor (C) connected between a pair of power supply lines (L1, L2). A diode (Ds) has its anode connected to one of the power supply lines (L1) and has its cathode connected to an end of a resistor (Rs), the other end of the resistor is connected to an end of a capacitor (Cs), the other end of the capacitor is connected to the other of the power supply lines (L2). In this way, the magnitude of a rectified voltage (Vdc) across the smoothing capacitor (C) can be reduced as compared with an absence of the series connection of diode (Ds), resistor (Rs) and capacitor (Cs).

REFERENCES:
patent: 4788485 (1988-11-01), Kawagishi et al.
patent: 6301131 (2001-10-01), Yoshida
patent: 1 0-32094 (1998-02-01), None
patent: 11-313490 (1999-11-01), None
patent: 2000-333461 (2000-11-01), None
patent: 2002-272129 (2002-09-01), None
patent: 2002-354826 (2002-12-01), None
Takahash, The Institute of Electrical Engineers of Japan, National Conference, 4-149, pp. 1591, (Mar. 2002), with English language translation.

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