Abstract
Brushless dc motor by motor drive, and is a kind of typical electromechanical products. Currently, small power brushless DC motor areas of rapid development of new motors. As the various areas of applications requires its own unique brushless DC motor, the brushless DC motor of the type more. Generally have a computer and external memory VCD, DVD, CD spindle drive motor with a flat-type non-core structure, a small fan motor with external rotor structure, household appliances with multi-polar magnetic field structure and the interior structure, electric bicycle multi-polar, outer rotor structure and so on.
The basic theory of the DC brushless motor and MC33035 chip are int- -roduced．Especially，it focuses on the design of control of electric appliance composed by the DC brushless motor，MC33035 and MC33039 chip， both of which form the double-loop step less speed regulation system employing the Hall elements．
The design of driver mainly contained：the main controlled circuit power driver circuit．Through MC33035 and MC33039，we control MOSFET todrive bldc motor，we can obtain the position—loop and speed—loop to do closed—loop contro1 ．
Key words: MC33035 DC ；brushless motor ；Controller
