Electronically commutable motor

Details Electronically commutable motor Electronically commutable motor

2006-03-28

2006-03-28

Masih, Karen (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S132000

Reexamination Certificate

active

07019479

ABSTRACT:
An electronically commutatable motor with a preferably three-phase excitation winding in the stator, which, in order to generate a torque for a permanent magnet rotor, can be connected to a direct current source via a motor control unit and a commutation device equipped with semiconductor switches. The motor is intended for use as a drive motor of a safety-critical auxiliary drive unit in a motor vehicle, in particular as the drive motor of an electrical power-assisted steering unit, wherein additional or existing switching means suppress or at least partially compensate for a braking moment that is generated by the motor in the event of a winding short and/or a malfunction in the semiconductor switches of the commutation device.

REFERENCES:
patent: 4817471 (1989-04-01), Tury
patent: 4984647 (1991-01-01), Morishita et al.
patent: 5659472 (1997-08-01), Nishino et al.
patent: 6194849 (2001-02-01), Wilson-Jones et al.
patent: 0 340 044 (1989-11-01), None
patent: 0 800 979 (1997-10-01), None

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