Leading Stepper Motor 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.

Since 1963, Dart Controls has been designing and manufacturing some of the world’s most reliable variable speed motor drives, controls and accessories for electric motors. Through continuous innovation, a relentless dedication to the industry, and a commitment to high quality products and dependable delivery Dart Controls has retained the leadership position it established over 60 years ago.

Dart Controls, Inc. $$$

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....

ElectroCraft, Inc. $$$

Quickly rising as the world’s leading motor specialized company, SPG Motor pioneers the fractional horsepower motor market in innovation & advanced quality assurance. All of our fractional horsepower motors are ISO 9001 certified for automation equipment & appliances made by top companies like Whirlpool, Maytag & GE. For more information, contact SPG today!

SPG USA Inc. $$$

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...

maxon $$$

When you choose Composite Motors, you gain access to a reliable and forward-thinking partner in the realm of fractional horsepower motors. Our products are designed to endure, ensuring that your systems operate at their best for years to come. Join us in embracing the power of innovation and quality, as we continue to shape the future of fractional horsepower motors together.

Composite Motors, Inc. $$$
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placeholder image Dart Controls, Inc. ElectroCraft, Inc. SPG USA Inc. maxon Composite Motors, Inc.

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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