Hybrid Stepper Motor Working

The hybrid stepper motor is a combination of the features of the variable reluctance stepper motor and permanent magnet stepper motor in the center of the rotor an axial permanent magnet is provided.

Hybrid stepper motor working.

Once the xx is stimulated using dc supply then yy cannot excite. Stepper motors work on the principle of electromagnetism. Variable reluctance vr motors have a plain iron rotor and operate based on the principle that minimum reluctance occurs with minimum gap hence the rotor points are attracted toward the stator magnet poles. So the poles of the rotor will be changed from one direction to another.

A stepper motor also known as step motor or stepping motor is a brushless dc electric motor that divides a full rotation into a number of equal steps. Working of hybrid stepper motor now if the phase b b is excited keeping a a switched off in such a way that upper pole becomes north and lower becomes south then the rotor will align to a new position by moving through counterclockwise direction. There is a. The working principle of the hybrid stepper motor is similar to the permanent magnet motor.

It is magnetized to produce a pair of poles as north n and south s as shown in the figure below. Hybrid stepper motor working. Hybrid synchronous stepper motor. The word hybrid means combination or mixture.

Unlike a brushless dc motor which rotates continuously when a fixed dc voltage is applied to it a step motor rotates in discrete step angles the stepper motor can be controlled with or without feedback. A hybrid stepper motor is a combination of the variable reluctance and permanent magent type motors. The teeth of one ring are offset from those on the other ring by 3 6. The vr and pm stepper motors are the most common type of stepper motors.

To illustrate how these motors work consider a 1 8 hybrid stepper. The rotor of a hybrid stepper motor is axially magnetized like a permanent magnet stepper motor and the stator is electromagnetically energized like a variable reluctance stepper motor. The stator poles are offset by 90 and these are opposite polarity so that every 180 the stator poles are in identical polarity. In the above motor diagram it has two phases four poles and six tooth rotor.

The motor s position can then be commanded to move and hold at one of these steps without any position sensor for feedback an open loop controller as long as the motor is carefully sized to the application in respect to torque and speed. The hybrid stepper motor as the name suggest is a motor designed to provide better efficiency by combining the pros of both the permanent magnet stepper motor and variable reluctance stepper motor. A stepper motor or a step motor is a brushless synchronous motor which divides a full rotation into a number of steps. Hybrid stepper motor the word hybrid means combination or mixture.