Textile Machines

Fast Facts

Industry:

Customer Type:

User, OEM

Degree of Integration:

Complex

Ease of Application:

Difficult

Performance Level Required:

High

Suggested ABB Solutions:

ACS350
ACS550
ACS800

Required Drive Features

Closed Loop

Applications often require a precise measurement of load speed. Typically, an encoder is mounted to the motor shaft and its signal is used to indicate shaft speed. The drive can then adjust its output to the desired condition. Closed loop offers the highest accuracy and performance.
Requires: A drive with feedback capability, either as standard or as a plug-in option card.

Dynamic Response

High performance applications often demand nearly instant response to changes in speed or torque commands or input status changes. The higher the dynamic response, the more capable the drive is in meeting these demands.
Requires: A drive that meets the response demands.

High Maximum Frequency

Most applications operate at speeds at or below the motor rated speed (typically 1800 RPM (60Hz)) for the US and 1500 RPM (50Hz) elsewhere. Other applications such as high speed grinders and winders need to operate at much higher speeds, sometimes with special motors.
Requires: A drive that has a high enough maximum frequency to allow outputs high enough to achieve the needed motor speed.

PID Loop

An internal function provides closed loop process control with proportional, integral and derivative (PID) control. The PID function reads an analog input to the drive and compares it to a desired setpoint. The PID loop adjusts the drive output frequency (and therefore the process) to make the input value equal the setpoint.
Requires: A drive with one or more internal PID loops to eliminate the need for external hardware.

Power Loss Ride-Through

Applications that control a continuous process cannot afford to stop because of short power outages or dips. The process must continue to run through these outages, typically 2 to 3 cycles long.
Requires: A drive that has sufficient power loss ride-through capability.

Slip Compensation

A squirrel-cage motor slips under load. To compensate for this, the frequency can be increased as the motor torque increases.
Requires: A drive that provides adjustable slip compensation.

Speed Range

All applications operate over a given speed range, defined as the ratio of maximum continuous speed to minimum continuous speed.
Requires: A drive that can produce the needed torque and speed torque regulation (accuracy) over the required speed range.

Motor Control Type

Direct Torque Control (DTC)

High-performance applications often require precise torque control at any speed and often in the face of power dips, load changes and other transients. They require excellent dynamic response and World Class torque regulation. This control may have to be exercised without the use of an encoder on the motor.
Requires: A drive with ABB's Direct Torque Control (DTC) technology.

Regulation Type

Speed

Applications that depend on accurate speed to accomplish the task require a drive that can control or 'regulate' speed.
Requires: A drive that regulates speed to the needed accuracy. Methods include open loop, slip compensation and encoder feedback.

Torque

Applications that depend on accurate torque to accomplish the task require a drive that can control or 'regulate' torque. These applications typically control tension or force to produce a high quality product. The motor slip plus magnitude and phase angle of the output current are controlled to produce the commanded torque.
Requires: A drive that offers this motor control method when torque control is required.