Method and control circuit for controlling phase splitting...

Details Method and control circuit for controlling phase splitting... Method and control circuit for controlling phase splitting...

2008-07-29

2008-07-29

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Induction motor systems

Reversing

C318S778000, C318S753000

Reexamination Certificate

active

11551787

ABSTRACT:
After a power source is turned on, the motor stars by feeding a current to the auxiliary wiring for a first predetermined period. Then, a voltage induced in the auxiliary wiring is detected. Whether or not the detected inducted voltage is lower than a predetermined voltage is judged. The detected induced voltage is judged to be lower than the predetermined voltage when the shredder cannot cut the paper and the rotation speed of the motor is decreased. In this case, since the current is fed to the auxiliary wiring for a second predetermined period, the rotation speed of the motor is increased and an output torque is also increased, which leads to the cuttable state.

REFERENCES:
patent: 5119732 (1992-06-01), Lisy
patent: 5162718 (1992-11-01), Schroeder
patent: 5528120 (1996-06-01), Brodetsky
patent: 6252752 (2001-06-01), Nagahama
patent: 59-028889 (1984-02-01), None
patent: 64-043081 (1989-02-01), None
patent: 2948902 (1999-07-01), None
patent: 2000-032786 (2000-01-01), None
patent: 2005-151625 (2005-06-01), None

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