Find the right devices, application kits and support to control Stepper motors with Infineon's broad range of motor system solutions.
A stepper motor (or step motor) divides a full rotation into a number of discrete steps. The motor's position can then be commanded to move and hold at one of these steps. Once stopped, the stepper holds the load steady with a holding torque. Most stepper motors employ a doubly salient design with teeth on both the rotor and stator structures. Like a brushless DC (BLDC) or permanent magnet synchronous (PMSM) motor, the permanent magnets are located on the rotor, and the electromagnets are contained in the stator.
Key characteristics of a stepper motor
- Inexpensive, as the rotor contains no winding slip rings or commutator
- Easy to position – moves in steps based on pulses supplied to the stator windings
- Direction of rotation is changed by reversing the pulse sequence
- Speed control through frequency of pulses or pulse rate
Computer-controlled stepper motors are mainly used for holding or positioning applications, as for example plotters, printers, moving lights or mirror mounts.
Typical Block Diagram – Stepper Motor