Step motor: Characteristics and applications

Motor selection is a key point for the right operation of a drive mechanism. Discover when you may select a step motor and keep it on mind

When undertaking an electromechanical project, selection of the type of motor tends to be one of the most critical aspects for any Project Manager. Depending on the mechanical motion required you may choose between many solutions that range from universal motors, to step motors and servomotors. Here some tips about step motors:

When using direct current motors, one of the main issues is the lack of precision when starting and stopping the motor. Step motors, use a inductor that is powered using an external power source. Thus, in order to change its speed, you only need to modify and control the exciting current.

So, these electromagnetic, incremental or rotary devices, turn digital pulses into mechanical rotation. The rate of rotation is proportional to the quantity of pulses generated, while the rotation speed depends on the frequency of such pulses.

Advantages of step motors:

Higher motion and movement repetition accuracy.

Step error under 5%.

Perfect start and stop response.

Reliable and durable, since they have no brush contact.

Rotation angle proportional to input pulses.

Great range of rotational speeds, since it responds to the digital input pulse frequency.

More information about electric motors on the following link