Inverter controller

Details Inverter controller Inverter controller

1997-12-12

1999-08-24

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318778, 318809, 318811, H02P 763, H02M 748

Patent

active

059428767

ABSTRACT:
The inverter controller includes a deviation arithmetic circuit which calculates the deviation between the current command (reference) and the output current, a vector angle arithmetic circuit which calculates the deviation current vector angle on the basis of the deviation calculated by this deviation arithmetic circuit, and a switching sequence logic circuit which selects the switching signal on the basis of the deviation current vector angle calculated by the vector angle arithmetic circuit and its own switching signal being output or on the basis of the deviation current vector angle and its own switching signal and the switching signal output previously, and obtains an output current by controlling self-turn-off switching devices on the basis of the switching signal output by the switching sequence logic circuit.

REFERENCES:
patent: 4641075 (1987-02-01), Asano et al.
patent: 5038092 (1991-08-01), Asano et al.
patent: 5537308 (1996-07-01), Gritter
S. Ogasawara, et al., "Current-Controlled PWM Inverters Having High Speed Current Response and Low Harmonic Currents", The Transactions of The Institute of Electrical Engineers of Japan, vol. 106-B, No. 2, Feb. 1986, pp. 9-16.

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