Variable speed brushless DC motor

Details Variable speed brushless DC motor Variable speed brushless DC motor

2007-03-13

2007-03-13

Masih, Karen (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S132000

Reexamination Certificate

active

10709399

ABSTRACT:
A variable speed brushless DC motor includes a rotor, a stator module, and a commutation circuit having commutation switches and a speed-change switch. By means of on/off status of the speed-change switch to control the way of electric current passing through the stator module, the torque-rotational speed characteristic curve of the variable speed brushless DC motor is changed, and therefore the rotational speed of the motor is relatively changed.

REFERENCES:
patent: 6566841 (2003-05-01), Bush et al.
patent: 2003/0133317 (2003-07-01), Norrga

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