YASKAWA SGDH-05DE-OY AC Servo Drive – Sigma-II Series

YASKAWA SGDH-05DE-OY: 0.5 kW MECHATROLINK-II Servo Amplifier for Precision Multi-Axis Motion Control

The SGDH-05DE-OY is a 500 W AC servo amplifier from YASKAWA Electric’s Σ-II (Sigma-II) series, engineered for deterministic closed-loop motion control in industrial automation environments. It accepts a three-phase 200–230 V AC supply and communicates natively over the MECHATROLINK-II synchronous serial bus — a field-proven, time-division multiplexing protocol that delivers 0.5 ms or 1 ms cycle synchronization across up to 30 axes on a single network segment. The -OY suffix designates a factory-applied OEM customization package; the specific option sheet must be confirmed against the original purchase order or YASKAWA application engineering records before substitution.

Within a servo loop, the SGDH-05DE-OY executes current, velocity, and position control entirely on-board using a 32-bit DSP core. The position loop closure occurs at the amplifier level when operating in MECHATROLINK-II position mode, offloading trajectory interpolation from the host controller and reducing network jitter sensitivity. The IGBT power stage uses sinusoidal PWM modulation at a fixed carrier frequency, producing low torque ripple across the full speed range — a characteristic that directly affects surface finish quality in grinding and milling applications and registration accuracy in web-handling lines.

The incremental encoder interface supports 2,500 P/R quadrature signals from SGMAH, SGMPH, and SGMGH series motors in the 0.5 kW class. After ×4 edge multiplication, the effective position resolution reaches 10,000 counts per revolution. When paired with a 17-bit absolute encoder option, the feedback resolution extends to 131,072 counts per revolution, enabling sub-arc-minute positioning without homing cycles after power restoration.

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Technical Parameters

Hardware Logical Analysis

The SGDH-05DE-OY’s power stage is built around a three-phase IGBT bridge with integrated gate drivers and a dedicated DC bus capacitor bank sized for the 500 W continuous rating. The DC bus voltage is monitored by a hardware comparator that triggers an instantaneous overcurrent shutdown within 2 µs — faster than any firmware interrupt latency — protecting both the IGBT junctions and the connected motor windings from fault propagation.

EMC Architecture: The amplifier incorporates a common-mode choke on the AC input lines and a differential-mode LC filter on the DC bus. The chassis ground plane is separated from the signal ground at a single star point, preventing ground loop currents from coupling into the encoder differential pair. The MECHATROLINK-II transceiver uses RS-485 physical layer with 120 Ω termination, and the signal lines are routed through an optocoupler isolation barrier rated at 500 V rms — isolating the network bus from the power stage ground reference. This architecture allows the amplifier to meet EN 61800-3 Category C2 conducted and radiated emission limits without external filtering in most panel installations.

Current Loop DSP Architecture: The 32-bit DSP executes the current control loop at a 62.5 µs sample period (16 kHz), which is 8× faster than the MECHATROLINK-II network cycle. This oversampling ratio means that velocity and position commands received from the network are interpolated within the DSP before being applied to the current reference, eliminating the velocity ripple that would otherwise appear at the network cycle frequency. The velocity observer uses a Luenberger structure with a configurable bandwidth parameter (Pn100), allowing the control engineer to trade off disturbance rejection bandwidth against noise amplification based on the mechanical resonance profile of the load.

Vibration Suppression Logic: Two independent notch filters (Pn408, Pn40A) are available in the velocity loop, each configurable from 50 Hz to 5,000 Hz with a depth of −40 dB. A third adaptive notch filter can track a resonance frequency that drifts with temperature or load inertia. This three-layer suppression architecture is particularly effective in ball-screw driven axes where the first torsional resonance typically falls between 200 Hz and 800 Hz.

Regenerative Energy Management: During deceleration, kinetic energy is returned to the DC bus. The internal regenerative resistor (47 Ω, 10 W continuous) handles the thermal dissipation for duty cycles with moderate deceleration rates. For applications with high inertia loads or frequent stop-start cycles, an external regenerative resistor unit (JUSP-RA series) can be connected to the dedicated terminals, extending the continuous regenerative power capacity to match the application’s energy balance.

System Integration Benefits

• Deterministic network synchronization: MECHATROLINK-II’s time-division multiplexing guarantees that all axes on the network receive their position commands within the same 0.5 ms or 1 ms window, eliminating inter-axis skew that would otherwise accumulate in asynchronous point-to-point wiring schemes.
• Reduced wiring complexity: A single shielded twisted-pair daisy-chain replaces individual analog ±10 V command cables and pulse-train wiring for each axis, cutting panel wiring labor and reducing the number of potential EMI ingress points proportionally.
• On-board auto-tuning: The adaptive auto-tuning function (Fn201) measures load inertia ratio in real time and adjusts the velocity loop gain, integral time, and position loop gain without requiring a separate tuning session, shortening machine commissioning from hours to minutes.
• Transparent fault diagnostics: The amplifier maps 64 distinct alarm codes to the MECHATROLINK-II status word, allowing the host controller to read the exact fault type — overcurrent, encoder error, regeneration fault, etc. — without polling a separate serial port or reading LED blink patterns.
• Inertia ratio monitoring: The estimated load inertia ratio is available as a real-time monitor variable (Un008), enabling predictive maintenance workflows that flag mechanical wear — such as ball-screw preload loss or coupling backlash — before it degrades positioning accuracy.
• Absolute position retention: When paired with a 17-bit absolute encoder, the amplifier stores the multi-turn position in battery-backed SRAM. After a power cycle, the host controller can read the absolute position via MECHATROLINK-II without executing a homing sequence, reducing machine restart time in applications where homing is mechanically constrained.
• Scalable multi-axis architecture: Up to 30 SGDH-05DE-OY amplifiers can share a single MECHATROLINK-II segment managed by one YASKAWA MP2000/MP3000 controller, with each axis individually addressable by station number. Adding or removing an axis requires only a station number change in the controller configuration — no hardware rewiring.
• Parameter non-volatility: All tuning parameters are stored in internal EEPROM with a write endurance of 100,000 cycles. Parameters can be backed up and restored via the MECHATROLINK-II network using the YASKAWA SigmaWin+ software, enabling rapid drive replacement in the field without manual re-entry of 50+ parameters.

Quality Assurance & Global Logistics

Every SGDH-05DE-OY unit supplied through siemensplc.com is sourced from verified YASKAWA authorized distribution channels or factory-sealed industrial surplus stock with full traceability documentation. Prior to dispatch, each unit undergoes a structured inspection protocol: visual examination of the PCB, connector pins, and housing for mechanical damage; verification of the nameplate data against the purchase order; and a functional power-on test confirming that the amplifier initializes without alarm codes and that the MECHATROLINK-II communication link establishes correctly.

Units are packed in anti-static ESD bags, placed in original or equivalent foam-lined cartons, and sealed with tamper-evident tape. For international shipments, a commercial invoice with HS code 8537.10 and a certificate of origin are included as standard documents to facilitate customs clearance. Express air freight from Xiamen, China via DHL, FedEx, or UPS typically delivers to major industrial hubs in Southeast Asia within 3–5 business days, to Europe within 5–7 business days, and to North America within 5–8 business days. Sea freight consolidation is available for bulk orders exceeding 20 units. All shipments are covered by cargo insurance, and tracking numbers are provided within 24 hours of dispatch.

The 12-month warranty covers manufacturing defects and component failures under normal operating conditions as defined in YASKAWA’s installation manual. Warranty claims are processed with a target response time of 48 business hours. Replacement units are dispatched before the defective unit is returned in confirmed cases, minimizing production downtime for the end user.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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