Servo Amplifier
For your information
- We offer for this displayed device sale, exchange and repair services.
- Prices for Servo-/Spindle Drives Power Supplies are standard prices for standard repair
- Devices for sell or exchange, was preventively overhauled in our workshop.
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Your unit will be completely overhauled. The following work will be performed on this drive module:
- Replacement of worn and defective parts such as capacitors, transistor modules, ICs and resistors.
- Overhaul and testing of all levels e.g. driver amplifier control, transistor module control, communication levels and network modules.
- The drive module will be tested on the engine test system with an original engine for a prolonged period of time.
- Thorough cleaning: where required, the old paint will be removed and the relevant surface will be repainted.
The high quality work enables us to provide 12 months warranty for proper functioning.
We know about the following faults, for example, and can remedy them:
| Fault |
Cause |
| No function or LED display |
Power supply module, power supply module control, internal short circuit |
| The engine stutters |
Driver amplifier control, transistor modules failed |
| Only functions after warming up |
Internal power supply unit, system control board |
| No communication with the CNC |
System control board |
In principle, any possible faults can be detected and remedied in our test system.
We offer serial repairs for this product series
- Repair of many electronic assemblies according to standardized repair procedures with documentation.
- A larger repair capacity is possible for the same or similar orders
- Target group: machine manufacturers, service companies and distributors
Access to years of experience, specialists and equipment.
Find out more about our series repairs
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