Electricity: motive power systems – With particular motor-driven load device – Power- or motion-transmitting mechanism
Patent
1990-09-24
1992-03-31
Ro, Bentsu
Electricity: motive power systems
With particular motor-driven load device
Power- or motion-transmitting mechanism
318 12, H02K 7116
Patent
active
051011433
ABSTRACT:
A spindle control system enables a gear change while a spindle is rotating by calculating the position of a motor shaft when gears are reengaged by a target position calculating circuit, and outputting speed commands for the motor shaft by a position control circuit based on the calculation result, and switching by a switching circuit so as to input the speed commands to a speed control circuit. That is, the spindle control system is of the type which controls a spindle in speed and position by a motor via a variable speed gear mechanism, and which includes: a target position calculating circuit for calculating the position of a motor shaft when gears are engaged therewith based on a gear command, the detected position of the spindle and the detected position of a motor shaft; a position control circuit for outputting speed commands for the motor shaft based on the result of the calculation by the target position calculating circuit, and a switch circuit for switching circuits so as to input the speed commands outputted from the position control circuit to a speed control circuit for the motor when gear engagement is to be changed.
REFERENCES:
patent: 2990503 (1961-06-01), Clark
patent: 3705339 (1972-12-01), Rhoades et al.
patent: 4096418 (1978-06-01), Marumoto et al.
patent: 4569013 (1986-02-01), Kishi et al.
patent: 4800325 (1989-01-01), Nakanishi
patent: 4814681 (1989-03-01), Unno et al.
patent: 4992712 (1991-02-01), Fujimoto et al.
Kabushiki Kaisha Okuma Tekkosho
Ro Bentsu
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