Multi-phase current supplying circuit, driving apparatus, compressor, and air conditioner

A multi-phase current and circuit technology, which is applied to electrical components, output power conversion devices, and AC power input to AC power output, etc. Power consumption and effect of suppressing rise in voltage across both ends
CN101073198AInactive Publication Date: 2007-11-14DAIKIN IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAIKIN IND LTD
Publication Date
2007-11-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A multi-phase current supplying circuit comprises a diode bridge (2), an intervening circuit (3a), an inverter (4), a control circuit (6) and a lightning arrester (7). A single-phase AC power supply system (1) is connected to the diode bridge (2) via the lightning arrester (7), whereby a single-phase AC voltage (Vin) is full-wave rectified. The intervening circuit (3a), which has a capacitor (31) and an inductor (32), is constituted by a choke input type of lowpass filter. Specifically, an end of the inductor (32) is connected to an end of the capacitor (31), and an output of the diode bridge (2) is received between the other end of the inductor (32) and the end of the capacitor (31), whereby a rectified voltage (Vdc) occurring across the capacitor (31) is outputted to the inverter (4).
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Description

technical field

[0001] The present invention relates to inverter technology. Background technique

[0002] FIG. 14 is a circuit diagram showing the configuration of a conventional multiphase current supply circuit. The power supply system 1 has an AC power source 13 that provides an AC voltage V to the diode bridge 2 in . However, the inductance parasitic in the power supply system 1 is shown as an inductor 12 connected in series with an AC power supply 13 .

[0003] Diode bridge 2 for AC voltage V in Perform full wave rectification. An intermediate circuit 3 is provided between the diode bridge 2 and the inverter 4 , and the output of the diode bridge 2 is supplied to the intermediate circuit 3 . The intermediate circuit 3 has a capacitor 31 across which the output of the diode bridge 2 is supplied. The capacitance value C of the capacitor 31 is set small, for example, 20 μF. Capacitor 31 can be downsized by reducing the capacitance value C.

[0004] The rectified v...

Claims

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