Information about Servo Drives

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About Servo Drives

Servo drives provide electrical outputs to servo motors in closed-loop motion control systems that use positional feedback and corrective signals to optimize position, speed, and accuracy. They control one or more axes, provide analog or digital control signals, and often feature integral motion controllers. Servo drives are used with many different types of motors. AC and DC motors feature brushed or brushless designs and are suitable for a variety of industrial applications. Brushed motors provide commutation via physical contacts, usually spring-loaded graphite brushes. Brushless motors provide commutation electronically, without physical brush contact, and use trapezoidal or sinusoidal drives. Trapezoidal servo drives successively energize two motor windings at one time before proceeding to the next pair. Sinusoidal servo drives provide three sinusoidal signals to three motor windings at one time. Other motor types for servo drives include linear motors, voice coil motors, and vector motors.

Products & Services Related to Servo 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.

Stepper Motor Drives

Stepper motor drives power unipolar and bipolar stepper motors in full step, half step, and microstep motion control applications.

Engineering Web: Servo Drives - Machine Design

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