Information about Stepper Motor Drives

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About Stepper Motor Drives

Stepper motor drives power unipolar and bipolar stepper motors in full-step, half-step, and micro-step motion control applications. They act as an interface between the controller and the motor, and must match the control signals (voltage and power levels) and signal type (analog or digital). Drive type is the most important factor to consider when selecting stepper motor drives. With unipolar or bifilar stepper motors, current flows in only one direction in each winding. Bipolar stepper motors have two windings through which the drive current is alternated. Most bipolar drives and motors generate more torque than unipolar systems. Full-step stepper motors move in increments of the magnetic detent positions. With a half-step drive, the stepper motor can be positioned midway between the magnetic stop positions. This doubles the resolution and allows the motor to advance to the next magnetic position when the power is disconnected. Micro-step or mini-step motors define a discrete number of angular positions between each full step. Mini-stepping and micro-stepping motor drives use electronic methods to enhance the positional resolution of the control system.

Products & Services Related to Stepper Motor Drives

AC Motor Drives

AC motor drives interface controllers to AC motors. They match the control signals (voltage and power levels) as well as the signal type (analog or digital). They also provide power conversion, amplification, and the sequencing of waveform signals.

DC Motor Drives

DC motor drives act as the interface and power supply between a motion controller and a DC motor.

Motion Control Systems

Motion control systems contain matched components such as controllers, motor drives, motors, encoders, user interfaces and software. Components in these systems are optimally matched by the manufacturer.

Motion Controllers

Motion controllers range from simple linear controllers to complex, user-programmable modules that act as controllers within complex integrated multi-axis motion systems.

Motor Controllers

Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors. They include a power supply, amplifier, user interface, and position control circuitry.

Motor Speed Controllers

Motor speed controllers are electronic devices that control motor speed. They carry specifications for drive type, product classification, electrical ratings, and operating parameters.

Servo Drives

Servo drives provide electrical drive outputs to servo motors in closed-loop motion control systems where position feedback and corrective signals optimize position and speed accuracy.

Engineering Web: Stepper Motor Drives - Machine Design

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Electric Motors & DC Motors This section is split into the electric motor type: AC motors, DC motors, stepper motors and electrical drives.
Programmable Logic Controller (PLCS) - Servo Control -... ( PLCS ) 2 3 4 5 6 AC Motor Controllers Servo Control Accelerometers 2 3 Selecting a Motor Controller for Electrical Drives 2 3 Programmable Logic
The Switch to Switched Reluctance \| Machine Design Resources Emerson Motor Technologies, emersonmotors.com Short tutorial on SR motors by Freescale Semiconductor, tinyurl.com/5gg8p5

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