LSRPM is a series of permanent-magnet synchronous motors incorporating technology patented by Leroy-Somer. The innovative design of the magnet rotor increases efficiency by almost 10% to levels approaching 98%. The size reduction is of the order of 50%. This type of motor is intended for applications for which electricity consumption is high and continuous. This means that in a very large number of cases the time to return on investment for replacement of an asynchronous motor by LSRPM will be less than one year. As motors account for more than 70% of the electrical energy consumed in industry, the new LSRPM product line also contributes to the essential objectives of CO2 emission reduction.
The use of variable speed and the optimization of mechanical systems are the main routes to achieving maximum savings. LSRPM is part of the DYNEO range. At the cutting edge of commercially-available variable speed technologies, this range brings together all Leroy-Somer´s variable-speed controller and permanent-magnet synchronous motor solutions.
The performance of LSRPM is based on radial-magnet rotor technology patented by Leroy-Somer.
By reducing rotor losses, this technology enables efficiencies of about 98% to be achieved and increases thepower-to-weight ratio of the motor. This advantage is not only valid at rated speed, but is greater below the rated speed, which is the case by definition in variable-speed applications.
The comparison with conventional motors depends on the application. In the specific case of a screw compressor driven initially by a variable-speed system based on a 2-pole asynchronous motor with IP23 rated enclosure, shaft height 315 mm and power 280 kW, the efficiency under variable-speed control is 92.7%. The DYNEO solution with a 260 kW (without derating) LSRPM 280 MD permanent-magnet synchronous motor achieves an efficiency under variable-speed control of 97.6% over a speed range from 0 to 3000rpm.