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IE5 synchronous reluctance motors promise lowest TCOs

29 March, 2022

The French motor manufacturer Nidec Leroy-Somer has developed a range of super-premium efficiency permanent magnet-assisted synchronous reluctance motors which, it says, combine the easy set-up of induction motors with the high performance of synchronous permanent magnet technologies, as well as offering “significant advances” in terms of their use with smart drives.

The Dyneo+ motors achieve energy efficiency levels above IE5 to reach the highest efficiency levels of the IEC 60034-30-2 and Nema Super Premium / Ultra-Premium standards. Leroy-Somer claims that the motors deliver the lowest TCO (total cost of ownership) on the market.

Designed for variable-speed applications, the motors can be used with Leroy’s Powerdrive F300 and new Bluetooth-enabled Powerdrive MD Smart variable-speed drives. An interactive application called Systemiz provides a variety of digital services to exchange information between the drives and motors, and to trigger subsequent actions.

By scanning a QR code on the motor nameplate, the app – which runs on mobile devices – gives direct access to the motor parameters for easy set-ups. A configurable interface module for the Powerdrive MD Smart drive can be used to set up predictive maintenance with the help of customised alarm generation and diagnostic tools. The Systemiz app also offers access to product literature.

The Dyneo+ motors cover power ratings from 11-430kW and speeds up to 6,000 rpm. There are two variants:
• a version that is interchangeable with standard IEC motors, allowing it to be used in existing applications without any modifications; and
• a compact version claimed to have one of the highest power-to-weight ratios on the market, designed for applications with limited space, and to optimise energy consumption.

There are IP55 versions with aluminium housings (the LSHRM range), IP23 versions with steel housings (PLSHRM), and a cast-iron range (FLSHRM) suitable for aggressive environments or applications exposed to severe mechanical stresses.

Nidec Leroy-Somer’s Dyneo+ permanent magnet-assisted synchronous reluctance motors have been designed to work with matching smart drives

The new motors can be used with or without position feedback sensors. They offer accurate speed and torque control, and constant torque over extended speed ranges, with no need for derating or forced ventilation. They can also deliver high torque at high speeds. High starting performance in the sensorless mode avoids the need for an encoder.

The motors have been designed for rapid installation, simple parameter setting and easy maintenance. A large terminal box simplifies wiring, while the motors can be assembled or dismantled as easily as an induction motor. Low-loss rotors are said to cut maintenance costs, especially by increasing greasing intervals.

The Dyneo+ motors are based on the proven mechanical platform of Leroy-Somer’s IMfinity induction motors, said to result in extended service lives. Their bearings are adapted to variable-speed applications and sized to withstand heavy shaft loads. The motors’ windings have reinforced insulation, and their rare-earth-free rotors exhibit low overheating and good thermal protection thanks to CTP and PT100 sensors which are fitted as standard.

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