Torque control apparatus for rotary machine

Details Torque control apparatus for rotary machine Torque control apparatus for rotary machine

1986-10-06

1988-04-05

Ro, Bentsu

Electricity: motive power systems

Constant motor current, load and/or torque control

318311, 318312, 318332, 318433, H02P 700

Patent

active

047361433

ABSTRACT:
A torque control apparatus for a compressor driven by a motor through a main shaft, in which variations of the rotation speed of the main shaft due to torque variations are detected at selected angular positions of rotation of the main shaft. Current values to be supplied to the motor for eliminating the rotation speed variations depending on the angular positions of rotation of the main shaft are computed and stored during at least one revolution of the main shaft, and, in the next revolution of the main shaft, that is, when the main shaft rotates then to a 360.degree. advanced angular position, the motor current is controlled on the basis of the current values supplied for at least one revolution of the main shaft, thereby eliminaitng variations of the rotation-speed of the main shaft.

REFERENCES:
patent: 3206665 (1965-09-01), Burlingham
patent: 3764888 (1973-10-01), Anderson
patent: 4103216 (1978-07-01), Hayes
patent: 4218735 (1980-08-01), McCutcheon
patent: 4400654 (1983-08-01), Elliott
patent: 4543516 (1985-09-01), Kobori et al.
patent: 4563623 (1986-01-01), Matsuka
patent: 4604036 (1986-08-01), Sutou et al.

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