Component knowledge
Stepping Motor
Stepping motor is an open-loop control device which converts the electric pulse signal into angular
displacement or linear displacement. In non-overload condition, the speed of the motor and the location of
the stop depends only on the pulse signal frequency and pulse number, and not affected by the load changes.
A small four-phase deceleration stepping motor is shown as follows:
The schematic diagram of four-phase stepping motor is shown below:
The outside piece is the stator and the inside is the rotor of the motor. There are a certain number of coils,
usually integer multiple of phases number, in the stator and when powered on, an electromagnet will be
formed to attract a convex part (usually iron or permanent magnet) of the rotor. Therefore, the electric
motor can be driven by conducting the coils on stator orderly.
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