A Sensorless Drive System of BLDC Motor (Paperback)

To drive the PMBLDC motor, for the conventional 120-degree commutation, the winding without phase current in each conduction interval can be considered as a sensor for back-emf detection. However, in the case of 180-degree commutation, the back-emf detection cannot be realized because all the three phases conduct current in each interval and no back-emf signals are available on stator terminals, which is the reason why the 180-degree sensorless commutation has not been considered so far. In this thesis, a novel 180-degree sensorless system for a PMBLDC motor is proposed. The position and speed information are estimated based on the back-emf signals, which are estimated from the simple sensing of the stator terminal voltage and phase current signals. Each phase of the conventional 120-degree rotates only 120 degrees with current to generate torque and waits for next excitation in the other 60 degrees without torque generated. However, each phase of the proposed 180-degree sensorless system conducts current for the entire electrical period, which produces more torque. The comparison between the 120-degree and the 180-degree sensorless system is also investigated.

General

Imprint:	Lap Lambert Academic Publishing
Country of origin:	Germany
Release date:	July 2012
First published:	July 2012
Authors:	Boyang Hu • Yash Shrivastava • Swamidoss Sathiakumar
Dimensions:	229 x 152 x 8mm (L x W x T)
Format:	Paperback - Trade
Pages:	128
ISBN-13:	978-3-659-16782-9
Categories:	Books > Professional & Technical > Technology: general issues > General
LSN:	3-659-16782-7
Barcode:	9783659167829

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