Frequency control based on sensing voltage fed to an induction m

Details Frequency control based on sensing voltage fed to an induction m Frequency control based on sensing voltage fed to an induction m

1989-09-29

1990-09-18

Shoop, Jr., William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318806, 318803, 363 41, 363 37, H02P 540

Patent

active

049581171

ABSTRACT:
A frequency control method is incorporated in a motor drive to prevent overcurrent trips when an induction motor is subjected to impact loads or reconnection under load. The drive includes a current regulator loop to control stator current and a voltage regulator loop to control the command to the current regulator. Motor voltage is sensed and a voltage error is developed. This voltage error is processed through a proportional-integral control loop which controls an operating frequency signal to the current regulator. The drive responds during current limit conditions to reduce operating frequency and speed until the current limit conditions subside. The motor can then be re-accelerated up to the desired operating speed.

REFERENCES:
patent: 4451771 (1984-05-01), Nagase et al.
patent: 4463289 (1984-07-01), Young
patent: 4680526 (1987-07-01), Okuyama et al.
patent: 4680695 (1987-07-01), Kerkman et al.
patent: 4724373 (1988-02-01), Lipo
patent: 4757248 (1988-07-01), Fujioka et al.
patent: 4767976 (1988-08-01), Mutoh et al.
patent: 4792741 (1988-12-01), Matsuo et al.
patent: 4800327 (1989-01-01), Fujioka et al.
patent: 4808903 (1989-02-01), Matsui et al.
patent: 4862343 (1989-08-01), Nomura et al.
Mutoh, N., et al., "Tripless Control Methods for General Purpose Inverters," Conference Record 1988 Power Electronics Specialists Conference, Apr. 1988, pp. 1292-1299.
Kerkman, R. J. and Rowan, T. M., "Voltage Controlled Current Regulated PWM Inverters," Conference Record, 1988 IEEE Industry Applications Society Annual Meeting, Oct. 2-7, 1988, pp. 381-387.

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