Product OverviewThe SDPM5 series is a low-voltage permanent magnet synchronous motor (PMSM) designed for variable-frequency drive (VFD/VSD) operation. It is engineered for high eff

Product Overview

The SDPM5 series is a low-voltage permanent magnet synchronous motor (PMSM) designed for variable-frequency drive (VFD/VSD) operation. It is engineered for high efficiency, precise speed control, and high power density. The series covers frame sizes H80–H355, rated power 0.37–315 kW, rated voltage 380 / 660 V, with typical rated speeds of 3000 rpm, 1500 rpm, and 1000 rpm.

SDPM5 motors are ideal for industrial applications requiring high efficiency, fast dynamic response, and high torque density, such as pumps, fans, compressors, drive systems, conveying equipment, and specialized machinery. When used with VSD systems, regenerative braking and energy recovery can be realized.

Key Technical Features

• Permanent magnet synchronous design: Utilizes high-performance rare-earth permanent magnets and optimized electromagnetic design, delivering high efficiency, low losses, and high power density.

• Optimized for variable-frequency operation: Designed for VSD systems with a wide frequency range (5–100 Hz), providing excellent low-speed torque and dynamic response; suitable for vector control and direct torque control (FOC / DTC).

• High efficiency & energy savings: Significantly more efficient than conventional induction motors under rated conditions, reducing long-term energy consumption and operating costs. Certain configurations can reach or approach IE4 / IE5 efficiency levels depending on application and design.

• Cooling & thermal management: Standard cooling method IC411; optional forced ventilation (e.g. IC416) available to ensure controlled temperature rise under low-speed or high-load VFD operation.

• Insulation & thermal endurance: Typically designed with Class F insulation and verified to Class B temperature-rise limits, ensuring long-term stability and reliability.

• Monitoring & protection interfaces: Optional PT100 / PT1000 RTDs, thermistors, encoders / tachogenerators, vibration sensors, etc., supporting intelligent monitoring and integrated protection.

• Mechanical design & mounting: Frame sizes H80–H355 (national standard), available in horizontal and vertical mounting; shaft ends, flanges, and mounting holes comply with national standards for easy replacement and integration.

• Drive compatibility: Optimized for inverter/drive systems; recommended for drives with vector or torque control and closed-loop speed control. Regenerative operation supported via energy feedback units or braking systems.

Typical Technical Data (Range)

VFD Operation Notes & Boundary Conditions (Low-Voltage Motors)

• Power supply quality: Voltage fluctuation and imbalance affect performance; recommended voltage variation within ±10% and three-phase imbalance ≤ 1–2%.

• Inverter selection: Use drives supporting closed-loop vector or torque control (encoder/tacho feedback). Consider output filters (dv/dt or sine filters) to reduce stress on motor insulation and bearings.

• Cabling & wiring: Cable length, shielding, and grounding between inverter and motor influence dv/dt, voltage spikes, and shaft currents. Long cables may require dv/dt filters or reactors; shielded cables with proper grounding are recommended.

• Bearing protection: VFD operation may generate shaft currents; bearing insulation, shaft grounding rings, or external grounding measures are recommended for critical applications.

• Cooling at low speed: Fan cooling effectiveness decreases at low speed; evaluate the need for forced ventilation (IC416) or auxiliary cooling to keep temperature rise within limits.

• Control & feedback: For high-precision speed or position control, encoders or tachogenerators with closed-loop control are recommended to achieve superior dynamic performance and stability.

• Environmental protection: For dusty, corrosive, or high-humidity environments, specify appropriate protection class and surface treatment during selection.

• Condition monitoring: Temperature, vibration, and speed monitoring are recommended for integration with PLC or monitoring systems to enable early warning and predictive maintenance.

Typical Applications

The SDPM5 series is suitable for high-efficiency, controllable, and fast-response drive applications, including variable-speed pump stations, automated fan systems, compressor VFD control, packaging and printing machinery, textile machinery, conveying and positioning systems, and other industrial applications with demanding energy-saving and precision speed-control requirements. For applications with frequent braking or energy recovery needs, SDPM5 motors can be combined with regenerative units or energy-storage systems to further improve overall system efficiency.

Factory Inspection & Documentation

Before shipment, each SDPM5 motor undergoes strict testing procedures, including mechanical inspection, winding insulation resistance and high-voltage tests, no-load and load tests, temperature-rise tests, vibration and noise measurement, dynamic balancing, and closed-loop commissioning when encoders are supplied. Documentation provided includes a certificate of conformity, inspection report, wiring diagrams, control recommendations, encoder/sensor interface drawings, and installation & maintenance manuals.

Ordering Information

When placing an order, please specify: motor model (SDPM5), frame size, rated power, rated voltage, rated speed, number of poles, cooling method (IC411 / IC416), mounting arrangement (horizontal / vertical), encoder or tachogenerator requirements, temperature/vibration monitoring, regenerative or braking unit requirements, operating environment (dust, corrosion, altitude, etc.), and inverter details (drive brand, cable length, control method). Providing complete operating conditions enables optimal motor and drive matching.