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Stepper Motors

A reliable source for Stepper Motors information and leading Stepper Motors Companies & Manufacturers.

A stepper motor is an electrical motor, as shown in the figure below. The shaft protruding out of the motor is attached to a rotor that rotates following the concept of electromagnetism. This converts electrical energy into mechanical energy. Without the need for any sensor, the angular position of the shaft can be determined accurately by counting the rotation steps. Read More…

Stepper Motors A stepper motor is an electrical motor, as shown in the figure below. The shaft protruding out of the motor is attached to a rotor that rotates following the concept of electromagnetism. This converts electrical energy into mechanical energy. Without the need for any sensor, the angular position of the shaft can be determined accurately by counting the rotation steps.
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Leading Manufacturers

Mankato, MN  |  612-746-7624

At Electric Motor solutions, our goal is to provide the best motors and equipment to meet the needs of your application. Products include linear actuators, electric motors, speed reducers, custom motors, vacuum cleaner motors, AC motors, and more.

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Electric Motor Solutions $$$

Stratham, NH  |  844-338-8114

When reliability and power are a must, the universal motors you find at ElectroCraft can operate with high efficiency, low voltage, and at a low cost. Applications that our universal electric motors serve include robotics, packaging, automotive, and medical equipment. Electric motor products include the CompletePower™ Plus Universal Drive, complete with a user-friendly configurable interface. For more details, contact ElectroCraft today!

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ElectroCraft, Inc. $$$

Taunton, MA  |  650 524 8822

Maxon Precision Motors, Inc., manufactures small, high-quality, precision DC brush and brushless motors used in medical, semiconductor, test and measurement, robotics, and manufacturing applications, among others. These advanced motors range in size from 4 to 90 mm and are available up to 500 watts. maxon also offers an extensive selection of gearheads, encoders, tachometers, and control electronics to complement its family of motors.

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Maxon Precision Motors, Inc. $$$

Monroe, WI  |  608-325-9161

At Carter Motor, some of the motors manufactured include AC universal motors, small motors, DC universal motors, DC permanent magnet motors, DC shunt wound motors and gearmotors, along with many others. All Carter Motor products are designed and assembled in the United States by hard-working employees. From engineers to shipping clerks, the staff takes pride in every part of the process.

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Carter Motor Company $$$

Preston, CT  |  860-889-8476

Piela Electric, Inc.! Specialists in electric motor and pump service, repair, and replacement. You'll never be just a number with us. We blend technical excellence with the personal attention you expect. Serving our customers is our number one priority at Piela Electric, Inc. We make every effort to get you back on-line efficiently by our pick up and delivery policy and we guarantee all of our work for one year.

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Piela Electric, Inc. $$$

Titusville, FL  |  321-268-5500

Rex Engineering manufactures gear motors, AC motors and DC motors. We also specialize in sub-fractional HP motors and design all products to your custom specifications. We are focused on providing excellent customer service, quality workmanship, competitive pricing, and constant design improvements for more reliable and versatile products. Contact us today for more information.

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Rex Engineering Corp. $$$
placeholder image Electric Motor Solutions ElectroCraft, Inc. Maxon Precision Motors, Inc. Carter Motor Company Piela Electric, Inc. Rex Engineering Corp.

What is a Stepper Motor?

A stepper motor is an electrical motor, as shown in the figure below. The shaft protruding out of the motor is attached to a rotor that rotates following the concept of electromagnetism. This converts electrical energy into mechanical energy. Without the need for any sensor, the angular position of the shaft can be determined accurately by counting the rotation steps.

Steppers motors are available in a variety of sizes and materials to best suit the applications. As the name implies, the stepper divides one full rotation into smaller, equal rotations, also known as steps. This feature enables users to program it into moving only certain degrees hence controlling the motion.

Stepper Motors Operational Theory

Like all electric motors, stepper motors also consist of two main components. One is the stator which is a non-movable part. The other one is a movable part called a rotor. The rotor is usually a permanent magnet. It is encased by a stator. There are bar/teeth like structures on the stator which provide support for the coil, as shown in the figure below.

Four Phase Fractional Horsepower Stepper Motor

The stepper motor operates by generating the magnetic field in one of the stators. It is done by supplying electric current through the coil around the stator. The rotor moves towards the charged stator. The alternating current passing through the coil produces a magnetic field around the rotor. As a result, the rotor moves in steps depending on the magnetic field lines produced by the respective stator.

Types of Stepper Motors

The efficiency of stepper motors largely depends on how it's built. The following three types of stepper motors are based on structural differences. The type of rotor used determines the performance here.

Permanent Magnet Stepper Motor

In this type, the rotor is a permanent magnet. It easily lines up with the stator's magnetic force. This change ensures better torque production. Although it provides low speed and low resolution.

Variable Reluctance Stepper Motor

In variable reluctance motors, the rotor used is made up of an iron core. It is shaped to make it easier for the rotor to align with the magnetic field produced by stator bars. Unlike permanent magnet rotors, it produces higher speeds and resolution, but achieving better torque is impossible.

Hybrid Stepper Motor

These kinds of motors combine permanent magnet stepper motors and variable reluctance ones. It’s rotor consists of two caps made up of a permanent magnet shaped like a variable reluctance rotor. The mixture of design provides all the qualities and benefits of other motors. It has high speed, better torque, and good resolution. Since it is a hybrid and complex design, it costs more than the other stepper motors.

Benefits of Using Stepper Motors

Some of the benefits of stepper motors include:

  • Stepper motors have a cleverly engineered internal structure that enables users to track angular position and rotations without sensors.
  • These do not require extra maintenance.
  • Unlike DC motors which do not offer good torque at less speed, stepper motors provide better torque even at lower speeds.
  • Stepper motors usually are durable and have a long life.
  • Precise positioning by stepper motors makes it usable in robotics and automated processes where extreme accuracy is required.

Applications of Stepper Motors

Stepper motors are different in their utilizations, yet probably the most widely recognized uses include:

  • 3D printing equipment
  • Textile machines
  • Printing presses
  • Gaming machines
  • Medical imaging machinery
  • Small robotics
  • CNC milling machines
  • Welding equipment
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