Pertanyaan: Stepper Motor How It Works?

What are stepper motors and how do they work?

Stepper motors are DC motors that move in discrete steps. They have multiple coils that are organized in groups called “phases”. By energizing each phase in sequence, the motor will rotate, one step at a time. With a computer controlled stepping you can achieve very precise positioning and/or speed control.

How does a stepper motor move answer?

The rotation angle of the motor is proportional to the input pulse. The stepper motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control. It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.

What is the main function of stepper motor?

The stepper motor is an electromagnetic device that converts digital pulses into mechanical shaft rotation. Advantages of step motors are low cost, high reliability, high torque at low speeds and a simple, rugged construction that operates in almost any environment.

What is the main use of stepper motors?

The stepper motor is used for precise positioning with a motor, such as hard disk drives, robotics, antennas, telescopes, and some toys. Stepper motors cannot run at high speeds, but have a high holding torque.

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What are the types of stepper motor?

There are three main types of stepper motors:

  • Permanent Magnet Stepper. PM steppers have rotors that are constructed with permanent magnets, which interact with the electromagnets of the stator to create rotation and torque.
  • Variable Reluctance Stepper.
  • Hybrid Syncronous Stepper.

What voltage is a stepper motor?

Stepper motors have a rated voltage and current. A typical stepper motor like our NEMA 17 might have a rated voltage of 2.8 Volts and a maximum current of 1.68 Amps. This basically means if you hook it up to 2.8 Volts it will draw 1.68 Amps.

Why is stepper motor needed?

By energizing each phase in sequence, the motor will rotate, one step at a time. With a computer controlled stepping you can achieve very precise positioning and/or speed control. For this reason, stepper motors are the motor of choice for many precision motion control applications.

What are the specifications of stepper motor?


  • Size: 42.3 mm square × 48 mm, not including the shaft (NEMA 17)
  • Weight: 350 g (13 oz)
  • Shaft diameter: 5 mm “D”
  • Steps per revolution: 200.
  • Current rating: 1.2 A per coil.
  • Voltage rating: 4 V.
  • Resistance: 3.3 Ω per coil.
  • Holding torque: 3.2 kg-cm (44 oz-in)

How does a stepper motor move Sanfoundry?

Explanation: Variable reluctance stepper motor consists of a soft iron multi-toothed rotor and a wound stator. When the stator windings are energized with DC current, the poles become magnetized, and the teeth of the rotor are attracted towards the energized stator poles, and hence the rotor rotates.

What is full step in stepper motor?

FULL-STEP DRIVE During the full-step drive, the stepper motor driver energizes the two coils of the two-phase stepper motor in a pulse/direction command. Each pulse of this drive mode causes the motor to move a basic step angle.

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What is stepper motor output?

A stepper motor is a constant output power transducer, where power is defined as torque multiplied by speed. Anytime there are turns of wire surrounding a magnetic material such as the iron in the motor’s stator, it will have an electrical property called inductance.

How many steps does a stepper motor have?

Stepper motors usually have 200 or 400 full steps per one rotation of its shaft. one step is equal to 1.8°. For motors with 400 steps per revolution this means one step is equal to 0.9°.

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