Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-07-26
2008-10-28
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S607000, C388S812000, C358S497000
Reexamination Certificate
active
07443132
ABSTRACT:
A motor control device for controlling rotation of a motor by controlling a driving voltage applied to the motor is provided. The device includes a driving voltage control unit configured to control the driving voltage, and a detecting unit configured to detect rotation of the motor. The motor has operating characteristics indicative of relationship between the driving voltage and a rotation speed of the motor, where the operating characteristics have a specific dead-band range of driving voltages wherein the rotation speed of the motor is zero regardless of changes in the driving voltage. The driving voltage control unit performs a low rotation control operation including at least one alternating repetition of a first control operation and a second control operation. The first control operation adjusts the driving voltage to have a value outside of the dead-band range from a value within the dead-band range, while the second control operation adjusts the driving voltage to have the value within the dead-band range from the value outside of the dead-band range. The second control operation is performed after a specific first amount of motor rotation has been detected in the first control operation.
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Igarashi Hitoshi
Yoshihisa Yasuhiko
Colon Santana Eduardo
Donovan Lincoln
Seiko Epson Corporation
Sughrue & Mion, PLLC
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