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Description
The Yaskawa SGDM-15DN is an AC servo amplifier of the Sigma-II series for 400 V servo applications in the power range up to 1.5 kW. The SGDM series is technically based on the SGDH platform, meaning that alarms and troubleshooting are fully compatible with the SGDH series. The device is designed for precise axis control, high dynamics, and reliable continuous operation in industrial automation environments.
Overview
- Device category: AC Servo Amplifier (Servopack)
- Series/Class: Sigma-II (SGDM), 400 V class
- Power rating: 1.5 kW
- Design: compact, forced-air cooled, IP1X
Model Designation
- SGDM = Yaskawa Sigma-II Servopack (Compact Series)
- 15 = Power level 1.5 kW
- D = 400 V class
- N = Interface/Version variant
Technical Data
| Feature | Value |
|---|
| Manufacturer | Yaskawa Electric Corporation |
| Input voltage | 3 Ph 380–480 V AC, 50/60 Hz |
| Input current | 4.8 A |
| Output voltage | 3 Ph 0–480 V AC, 0–300 Hz |
| Output current | 5.4 A |
| Output power | 1.5 kW |
| Ambient temperature | 0–55 °C |
| Cooling | Forced ventilation |
| Protection class | IP1X |
| Weight / Dimensions | n. a. |
Connections & Interfaces
- L1 / L2 / L3 – 3-phase mains input 380–480 V
- U / V / W – Motor outputs
- B1 / B2 / B3 – Brake resistor / Regeneration
- CN1 – Control and I/O interface (24 V DC)
- CN2 – Encoder connection
- CN3 – RS-232C / Parameter setting (SigmaWin+)
- LED display – Status and alarm codes
Control Board / Assemblies
| Assembly | Description | Quantity |
|---|
| Control board | Control, logic, and communication | 1 |
| Power board | Output stage for 400 V power class | 1 |
| DC link | Capacitors / Energy buffer | 1 |
| Power section | Compact power section with heat sink | 1 |
Alarms & Troubleshooting
| Code | Designation | Typical Finding | Check | Remedy |
|---|
| A.02 | Parameter Breakdown | EEPROM data faulty | Initialization (Fn005) | Reload parameters |
| A.05 | Combination Error | Motor/Drive incompatible | Check motor type | Use suitable motor |
| A.10 | Overcurrent / Overheat | Overcurrent or overtemperature | Check U/V/W, load | Check power section |
| A.30 | Regeneration Error | Error in the regeneration path | Check RB circuit | Repair drive |
| A.32 | Regenerative Overload | Regeneration too high | Check load profile | Reduce load |
| A.40 | Overvoltage | DC link voltage too high | Measure mains voltage | Check supply |
| A.41 | Undervoltage | Supply too low | Check input | Stabilize mains |
| A.51 | Overspeed | Encoder or phase error | Check encoder | Correct wiring |
| A.71 | Overload 1 | Short-term overload | Check current curve | Check mechanics |
| A.C9 | Encoder Comm Error | Encoder communication disturbed | Check cable / shielding | Replace cable |
Typical Applications
- CNC axes in the 400 V power range up to 1.5 kW
- Automation and handling systems
- Positioning axes with higher DC link voltage
- Special machinery and industrial manufacturing
Service Notes
- Save parameters before servicing
- Regularly check encoder and motor cables
- Keep fans and cooling channels clean
- No insulation measurement (Megger) while installed
- Always check mechanics and ramps in case of overcurrent or regeneration alarms
Repair Description
- Input check: Visual inspection, measurement of mains and DC link voltage, short-circuit test on U/V/W
- Disassembly & Cleaning: Opening the housing, cleaning the boards, checking the cooling surfaces
- Analysis: Checking the power stage, capacitors, current measurement, and control logic
- Repair: Replacement of defective power components and aged components
- Testing & Load Test: Test run with reference motor, monitoring current and temperature
- Long-term Test & Completion: Continuous operation under load, documentation of measurement results