Yaskawa SGDB Sigma Series AC Servopacks

• 230VAC Three-Phase Input Power
• Accepts an Analog Voltage Speed Reference
• Three Internally Set Speeds
• Compact Design
• Easy Operation

The Yaskawa SGDB Sigma Series Servopacks are Amplifiers for the Sigma Series of AC Servos. Designed for applications requiring multi-drives, the SGDB can be used for speed control, torque control, and position control. A digital operator can be used to set parameters for a Servopack.

This servo system is an automatic control system that detects the machine position (output data), feeds back the data to the input side, compares it with the specified position (input data), and moves the machine by the difference between the compared data.

In other words, the servo system is a system to control the output data to match the
specified input data.

If, for example, the specified position changes, the servo system will reflect the changes. In the above example, input data is defined as a position, but input data can be any physical quantities such as orientation (angle), water pressure, or voltage.

Position, speed, force (torque), electric current, and so on are typical controlled values for a servo system.
The main technical terms used in this manual are as follows:
1) Servo mechanism
2) Servo

Normally, servo is synonymous with servo mechanism. However, because “mechanism” is omitted, the meaning becomes somewhat ambiguous. Servo may refer to the entire servo mechanism but may also refer to an integral part of a servo mechanism such as a servomotor or a servo amplifier. This manual also follows this convention in the use of the term “servo”.