Flowserve Corporation introduces the Flowserve Pleuger PMM8, a submersible electric motor that utilizes permanent magnet technology. Based on the Pleuger three-phase, AC, squirrel-cage induction motor, the PMM8 features higher efficiency at full and partial loads and lower thermal losses than asynchronous designs, according to the company, and a large air gap configuration. The motor can reportedly reduce energy costs by up to 10% and double power output while extending the life of the motor.
The PMM8 motor technology has demonstrated over 93% efficiency, according to Flowserve. Operated in conjunction with variable frequency drives, the PMM8 runs at synchronous speed with no rotor losses, which allows the pump to run at best efficiency point under variable flow conditions. In many cases, the 8-inch PMM8 design can be substituted for conventional 10-inch asynchronous motors, according to the company.
The PMM8 is available in a 190 mm (8 in.) motor size with power output of 50 kW (67 hp) to 200 kW (268 hp). Flowserve intends to release additional sizes in the future.