Key Highlights of  DR...J LSPM Synchronous Motors

1. Efficiency & Standards

• Efficiency classes IE2 to IE4 – meets international efficiency standards.

2. Core Technology: LSPM (Line Start Permanent Magnet)

• Based on integrating permanent magnets into the short-circuit cage of AC asynchronous motors, enabling synchronous permanent magnet operation.

• No rotor losses occur during operation, delivering higher efficiency.

3. Compact Design & Sizing Advantages

• Compared to standard DR.. series motors of the same power rating, smaller frame sizes can be selected to achieve the same efficiency class – saving installation space.

• Compact and robust design, low-maintenance.

4. Control & Operating Characteristics

• Designed for simple inverters with V/f control – easy to integrate.

• Synchronous operation with the line frequency – slip-free speed control without encoder feedback.

• Supports group drives – multiple motors can run at synchronous speed on a single frequency inverter.

• Proven combination with MOVIMOT® (gearmotor with integrated frequency inverter).

5. Performance Advantages

• No forced cooling fan required – offers a wide speed control range with constant torque.

6. Specifications & System Integration

• 9 frame sizes in total (71S to 100L).

• Full compatibility with the modular system – many additional features and options available.

• Can be freely combined with SEW gear units to form complete gearmotors.