Electricity: motor control systems – Closed loop acceleration control system for dc motor with... – Armature control
Patent
1997-05-05
1998-06-02
Ro, Bentsu
Electricity: motor control systems
Closed loop acceleration control system for dc motor with...
Armature control
318271, H02P 506
Patent
active
057613761
ABSTRACT:
A method and system are provided for controlling a motor to rapidly accelerate and synchronize with an external synchronization pulse. First, the motor is accelerated to only half of the desired speed. At this point, the phase error with the sync pulse is calculated, and the motor continues "cruising" at half speed until the phase discrepancy diminishes. Then the motor rises to the full desired speed at the optimal time such that it is in phase with the sync pulse just as it reaches full speed. The acceleration is performed at a constant, yet slow enough, rate to receive at least three speed feedbacks. Then the instantaneous speed can be accurately measured and the next (and final) speed command during acceleration is interpolated between the ideal command for rising and the ideal command for cruising at the desired speed. The amount of phase discrepancy that diminishes while rising, as well as the ideal motor commands for cruising and rising, at both half and full speeds are adaptively learned and stored for the next run.
REFERENCES:
patent: 4006977 (1977-02-01), Harrow et al.
patent: 4019814 (1977-04-01), Blaschke
patent: 4175840 (1979-11-01), Kittag
patent: 4183635 (1980-01-01), Dorig
patent: 4430746 (1984-02-01), Suzuki et al.
patent: 4449225 (1984-05-01), Tammisalo
patent: 4783793 (1988-11-01), Virta et al.
General Electric Company
Haushalter B. Joan
Pilarski John H.
Ro Bentsu
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