Hall sensor alignment for BLDC motor

Details Hall sensor alignment for BLDC motor Hall sensor alignment for BLDC motor

2005-06-10

2008-09-09

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400340, C318S459000, C318S500000, C388S928100

Reexamination Certificate

active

07423396

ABSTRACT:
A technique for determining an alignment error of a Hall sensor location in a brushless DC motor drive, by measuring the back EMF waveform, preferably while the motor is coasting. According to the technique, an angular offset is calculated between a selected BEMF waveform and a selected Hall signal. Such offsets are preferably calculated for each phase individually. The offsets may be advantageously stored in the motor control unit and used to adjust the output motor control signals for maximum torque.

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