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Servo Drive Amplifier

A drive or amplifier to transform the control signal from the motion controller into a higher power electric current or voltage that is presented to the actuator. Newer "intelligent" drives can close the position and velocity loops internally, resulting in much more accurate control.

Usage

A servo drive receives a command signal from a control system, amplifies the signal, and transmits electric current to a servo motor in order to produce motion proportional to the command signal. Typically the command signal represents a desired velocity, but can also represent a desired torque or position. A sensor attached to the servo motor reports the motor's actual status back to the servo drive. The servo drive then compares the actual motor status with the commanded motor status. It then alters the voltage frequency or pulse width to the motor so as to correct for any deviation from the commanded status.

In a properly configured control system, the servo motor rotates at a velocity that very closely approximates the velocity signal being received by the servo drive from the control system. Several parameters, such as stiffness (also known as proportional gain), damping (also known as derivative gain), and feedback gain, can be adjusted to achieve this desired performance. The process of adjusting these parameters is called performance tuning.

Although many servo motors require a drive specific to that particular motor brand or model, many drives are now available that are compatible with a wide variety of motors.

Applications

Servo systems can be used in CNC machining, factory automation, and robotics, among other uses.

 

 


Some of our Drive Amplifier Sponsors include...


TRINAMIC Motion Control

Trinamic Motion Control ICs, modules and mechatronic systems for motion control controllers and drivers for stepper, BLDC and piezo motors.

Advanced Micro Controls Inc

AMCI offers resolvers, stepper motion, network devices, encoders, programmable limit switches, packaging system & press system solutions.

MotiCont

MotiCont is a manufacturer of voice coil motors, three phase brushless motors and positioning stages and linear slides for industrial applications.

Parker Hannifin Corporation

A diversified manufacturer of motion control technologies including fluid power, electromechanical sustems.

QuickSilver Controls Inc.

QuickSilver Controls manufactures cost effective servo motors and servo controls.

© Content credits: Some of this page uses material from en.wikipedia.org .