Compressor drive system

Details Compressor drive system Compressor drive system

1982-11-26

1985-01-08

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

F04B 4906

Patent

active

044925263

ABSTRACT:
A compressor drive system for controlling the gas pressure in a pressure gas volume (106) connected to the compressor (101). A brushless alternating current motor (23) is directly coupled to the compressor, which is driven with the same speed as the motor. The pressure in the gas volume (106) is sensed by pressure sensing means (109) connected to a converter (114). The converter simultaneously changes the amplitude and frequency of the drive voltage supplied to the motor (23). This is done in response to pressure changes in volume (106). The motor is stopped if the pressure exceeds a preset maximum value. A pressure gas container (104) is depressurized at motor stop to allow restarting without counter pressure on the compressor. Means (44) for controlling the amplitude and frequency of the drive voltage is provided so that the normal speed maximum load current is never exceeded during motor start.

REFERENCES:
patent: 2629537 (1953-02-01), Graybrook et al.
patent: 2687841 (1954-08-01), Churchman
patent: 3499297 (1970-03-01), Ruff et al.
patent: 3860858 (1975-01-01), Nola
patent: 4145161 (1979-03-01), Skinner
patent: 4149827 (1979-04-01), Hofman
patent: 4220440 (1980-09-01), Taylor et al.
patent: 4259620 (1981-03-01), Oates et al.
patent: 4330817 (1982-05-01), Avar et al.

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