Current control system for inverter

Details Current control system for inverter Current control system for inverter

1990-02-05

1991-08-06

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318799, 318806, 318809, 318805, H02P 126

Patent

active

050380923

ABSTRACT:
A current component, in which a phase angle is different by a predetermined reference angle from a magnetic flux occurring in an inductive load, is brought to a q-axis current. The q-axis current is computed on the basis of phase current. A phase angle of the magnetic flux is detected. A q-axis-current control phase and a reference potential phase are determined on the basis of the result of pulse-width-modulation computation and the phase angle. The q-axis-current control phase is controlled in a pulse-width-modulation manner. A potential of the remaining reference potential phase if fixed to a reference potential. Thus, interference among the phases is prevented to reduce current ripple.

REFERENCES:
patent: 4267499 (1981-05-01), Kurosawa
patent: 4456868 (1984-06-01), Yamamura et al.
patent: 4792791 (1988-12-01), Matsuo et al.
patent: 4808903 (1989-02-01), Matsui et al.
patent: 4814683 (1989-03-01), Okamoto et al.
patent: 4843296 (1989-06-01), Tanaka
patent: 4926105 (1990-05-01), Mischenko et al.
patent: 9724373 (1988-02-01), Lipo
Perc 88 Record, Apr. 1988, pp. 207-218, H. Hashimoto, et al., "Practical Variable Structure Approach for Brushless Servo Motor Control--Practical Implemention of DSP--".

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