Yaskawa SGDH-04AE Sigma II 400W Servo Drive

The Yaskawa SGDH-04AE is a high-performance servo drive from the Sigma II series, designed for precision motion control in industrial automation applications. This SERVOPACK provides 400 watts of output power and operates on single-phase 200V AC input. The SGDH-04AE delivers precise torque, speed, and position control for AC servo motors, making it suitable for applications such as machine tools, industrial robotics, packaging machinery, semiconductor manufacturing equipment, and material handling systems.

Product Specifications

• Model: SGDH-04AE Sigma II SERVOPACK

• Rated Output Power: 400 Watts (0.4 kW)

• Input Voltage: Single-phase 200-230V AC ±10%, 50/60 Hz

• Output Voltage: Three-phase 0-230V AC

• Output Current: 2.8 A continuous

• Control Method: IGBT PWM inverter

• Control Modes: Torque, speed, and position control

• Protection Functions: Overcurrent, overvoltage, undervoltage, overload, regenerative error, encoder error

• Communication Interface: MECHATROLINK-III (selectable), RS-232C/RS-422

• Safety Features: STO and SLS optional

Sigma II Series Overview

The Sigma II series represents Yaskawa's advanced servo system technology, combining high-performance SERVOPACKs with AC servo motors for precise motion control. The SGDH-04AE SERVOPACK is part of this established series, known for its reliability, responsiveness, and ease of use. The Sigma II platform supports a wide range of motor capacities and control configurations, providing system integrators with flexible options for motion control applications. The SGDH-04AE is designed to drive compatible Yaskawa Sigma II series servo motors, forming complete motion control systems for industrial automation.

Advanced Control Capabilities

The SGDH-04AE supports three primary control modes to accommodate diverse application requirements. Torque mode provides precise current control for applications requiring force or tension regulation. Speed mode delivers accurate velocity control for conveyor systems, spindle drives, and other speed-critical applications. Position mode enables precise point-to-point positioning with step-and-direction or encoder following commands. The drive can switch between control modes dynamically based on digital input states, providing flexibility for complex motion sequences.

Automatic Motor Identification and Tuning

The SGDH-04AE features automatic identification of servo motor parameters, simplifying system setup and ensuring optimal performance. When connected to a compatible Sigma II series servo motor, the SERVOPACK automatically detects the motor power rating and specifications, setting appropriate parameters without manual configuration. The drive includes online autotuning capabilities that adjust position and speed loop gains based on load inertia estimation, optimizing performance for the connected mechanical system. This autotuning function reduces commissioning time and ensures stable operation across varying load conditions.

High-Speed Processing and Response

The SGDH-04AE utilizes advanced digital signal processing for high-speed control loop execution. Current loop updates occur at high frequency, providing rapid torque response for demanding applications. Speed loop bandwidth supports high dynamic performance, enabling precise velocity control even under rapidly changing load conditions. Position loop processing ensures accurate positioning with minimal settling time. The combination of high-speed processing and advanced control algorithms delivers the responsive performance required for precision motion applications.

I/O and PLC Integration

The SGDH-04AE provides comprehensive I/O for integration with PLC systems. Digital inputs accept control signals for servo enable, alarm reset, gain selection, and control mode selection. Digital outputs provide status signals for ready, alarm, brake control, and position/speed coincidence detection. Analog inputs accept torque or speed reference signals from PLC analog output modules. Analog outputs provide motor current and velocity monitoring for closed-loop control applications. The RS-232C/RS-422 serial interface allows parameter configuration and status monitoring from PLC programming software or operator interfaces.

Dynamic Braking and Regeneration

The SGDH-04AE includes a built-in dynamic braking circuit for controlled deceleration during fault conditions or emergency stops. This braking capability prevents uncontrolled motor coasting when power is removed, enhancing machine safety. For applications with high regenerative energy from decelerating large inertial loads, the drive can be equipped with an external regenerative resistor to dissipate excess energy. The regenerative circuit prevents overvoltage faults by managing energy returned from the motor to the DC bus.

Protection and Diagnostic Features

Comprehensive protection functions ensure reliable operation and simplify troubleshooting. Overcurrent protection detects excessive motor current and triggers fault shutdown to prevent damage. Overvoltage and undervoltage monitoring protect the drive from abnormal power conditions. Motor overload protection uses electronic thermal modeling to prevent overheating. Regenerative error detection identifies problems with the braking circuit. Encoder error detection ensures accurate position feedback. The drive logs fault events with diagnostic information for maintenance analysis.

Compact Design and Installation

The SGDH-04AE features a compact form factor optimized for control cabinet installation. The unit dimensions accommodate mounting in standard industrial enclosures, with multiple units mountable side-by-side for multi-axis systems. The drive includes a heat sink for passive cooling, eliminating the need for fans in many applications. Connector locations are arranged for convenient wiring access, simplifying installation and maintenance. The rugged construction withstands industrial operating conditions, including temperature variations, vibration, and electrical noise.

Typical Applications

The Yaskawa SGDH-04AE servo drive is deployed across numerous industrial automation applications. In machine tool systems, it drives feed axes requiring high-speed and precise positioning for milling, turning, and grinding operations. In industrial robotics, it provides reliable motor control for arm movement and end-effector positioning. In packaging machinery, it synchronizes axes for film feeding, sealing, and cutting operations. In semiconductor manufacturing, it positions wafers and components with sub-micron accuracy. In material handling, it controls conveyor drives and transfer systems.

Standards and Compliance

The SGDH-04AE complies with CE marking for European markets, confirming conformity with electromagnetic compatibility and low voltage directives. UL and cUL certifications demonstrate compliance with North American safety standards for industrial control equipment. The drive meets RoHS requirements for restriction of hazardous substances. The optional safety module enables compliance with international safety standards IEC 61800-5-2, incorporating Safe Torque Off and Safely Limited Speed functions for enhanced machine safety.

Conclusion

The Yaskawa SGDH-04AE Sigma II servo drive delivers 400W of precision motion control with advanced autotuning, multiple control modes, and comprehensive protection features. Its compact design, easy integration, and reliable performance make it a proven solution for industrial automation applications requiring accurate torque, speed, and position control.