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In home appliances applications the brush DC motor, driven by a chopper, can be controlled by a standard microcontroller. However people often consider the microcontrollers as not suitable for the power environment because of their limited computing speed or noise immunity problems. This paper shows how a cost effective digital motor drive can be designed by combining a chopper and an 8 bits microcontroller: the speed is simply controlled through direct voltage compensation and motor power limitation. The microcontroller implements both motor control and interface functions of the application: it replaces the analog circuits of the conventional motor control. Performances and practical results are given for a 300 W/12000 RPM motor drive.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Castagnet et al. (1994) studied this question.
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