Method for commutating an electronically commutated motor...

Details Method for commutating an electronically commutated motor... Method for commutating an electronically commutated motor...

2006-03-21

2006-03-21

Masih, Karen (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S132000

Reexamination Certificate

active

07015668

ABSTRACT:
An improved method of commutating an electronically commutated motor (20) is disclosed. The motor has a positive (34) and a negative connecting lead (36), a stator having at least one winding phase (22), a permanent-magnet rotor (26), a rotor-position sensor (28) for producing a rotor position signal (u1, u2), and a full bridge circuit (78), comprising a pair of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) coupled to each end of each winding phase (22). In order to prevent current shoot-through and prolong the service life of the MOSFETs, without employing a microprocessor, a respective-comparator (90, 90′, 92, 92′) is coupled to the gate of each MOSFET, in order to assure that the MOSFET is switched ON and OFF at an optimum time.

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patent: 2004/0139767 (2004-07-01), Weinmann et al.

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