Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Reexamination Certificate
2006-06-27
2006-06-27
Duda, Rina (Department: 2837)
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Field control, or field and armature control, by analog...
C388S815000, C388S823000, C318S629000, C318S632000, C318S432000
Reexamination Certificate
active
07068923
ABSTRACT:
A speed control apparatus includes a speed control part12for generating a source current command based on a difference between a speed command of a motor4and speed detection in which a speed of the motor4for driving a load2is detected, a notch filter14which can break a notch frequency resulting in a predetermined frequency selected among continuous frequency band widths and also generates a compensating current command in which the notch frequency is eliminated from the source current command signal, a notch filter adaptive part16for selecting the notch frequency so that the compensating current command in which a sustained vibration frequency component of the source current command is eliminated is generated from the notch filter14, a subtracter103for generating an elimination portion current command resulting in a difference between the source current command and the compensating current command, and an adder109for adding the compensating current command and the elimination portion current command and generating a current command passed through the motor4.
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“Steady-State Analysis of Adaptive IIR Digital Notch Filter” written by Lijie Han, Haiyun Jiang and Shotaro Nishimura published in Sep. 1998.
Duda Rina
Mitsubishi Denki & Kabushiki Kaisha
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