Types of miniature DC motor

A miniature DC motor only two leads, adjusting the power supply voltage or currentspeed, polarity changing two leads, motor reversing. The driving circuit controlled by the single-chip microcomputer, the general requirements to positive inversion andspeed regulation driving, and the volume is not too large.

Can be divided into special motor, electromagnetic motor and permanent magnet motor. Special motor generally no winding, driving motor is more complex, as a has been a system. Electromagnetic motor for different excitation mode, its characteristicsare different. Permanent magnet motor performance and electromagnetic shunt motoris similar, the starting torque is large, hard mechanical characteristic and load changes speed changes little, suitable for small power DC drive, such as electric toys,electric tools, audio equipment, automobile electrical appliance etc.. This paper mainly discusses the driving micro DC motor such power is small, have low voltage and small size of the.