What Is A Servo Drive

- Sep 08, 2016-

What is a servo drive

Servo drive,with servo motor,consist of the servo control system,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.


A servo drive is a special electronic amplifier used to power electric servomechanisms.A servo drive monitors the feedback signal

from the servomechanism and continually adjusts for deviation from expected behavior.

Working Routie

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.

Different kinds of servo drive

Servo drives differ in terms of electrical ratings, operating parameters, configurations, and features.Electrical ratings include maximum

output voltage, rated power, continuous output current, peak output current, AC supply voltage, and DC supply voltage. Servo drives 

use either single-phase or three-phase inputs at 50, 60, or 400 Hz. Operating parameters include specifications for setup and control

Some servo drives have manual controls such as knobs, DIP switches, jumpers or potentiometers.Others include a joystick, digital control 

panel, computer interface, or slots for PCMCIA cards.ECON's servo drive have panel to set parameter and button to operate motor,we call it 

Jog Operation.Control programs can be stored on removeable, nonvolatile storage media. Hand held devices are designed to be programmed 

remotely. Wireless and web-enabled controls are also available. Configurations for servo drives include several mounting styles. Most devices 

mount on a chassis, DIN rail, panel, rack, wall, or printed circuit board (PCB). Standalone devices and integrated circuit (IC) chips 

that mount on PCBs are also available. Features for servo drives include soft starting; dynamic, injection, or regenerative braking; 

brake outputs or auxiliary inputs/outputs (I/O); auto-tuning, self-diagnostics, and status monitoring;and alarms for conditions such as 

overvoltage. ECON's servo drive is soft starting,regenerative braking,brake outpust or auxiliary inputs/outputs,status monitoring,and 

alarms for conditions such as overcurrent,overvoltage.Almost servo drive has those features,and covers most application.

Advanced Technology

Computer-based servo drives use many different types of buses and communication standards. Bus types include advanced technology 

attachment (ATA), peripheral component interconnect (PCI), integrated drive electronics (IDE), industry standard architecture (ISA), 

general-purpose interface bus (GPIB), universal serial bus (USB), and VersaModule Eurocard bus (VMEbus). Communications standards 

include ARCNET, AS-i, Beckhoff I/O, open computer area network (CANopen) device network (DeviceNet), Ethernet, small computer 

systems interface (SCSI), smart distributed system (SDS), serial real-time communications system (SERCOS), and transistor-transistor logic (TTL). 

Serial interfaces such as RS232, RS422, and RS485 are also available.When control system supports buses or communication,then requires 

servo drives with buses or communication standards.But in most actual application of servo drive do not need Buses and Commnunication Standards.

Although ECON's servo drive has Canopen and RS485,few customer need this function.Anyway,products with more features,enlarge customer group,

and represent our ability.

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