Flowserve Expands Range of Permanent Magnet Submersible Motors
Based on the reliable Pleuger three-phase, AC, squirrel-cage induction motor, the PMM8 has proven advantages over asynchronous designs, including higher efficiency at full and partial loads, lower thermal losses and a robust, large air gap configuration. The result is a motor that can reduce energy costs by up to 10 percent and boost power output by over 100 percent, while extending the overall life of the motor.
The PMM8 motor technology has demonstrated over 93 percent efficiency, one of the most efficient eight-inch submersible motors on the market. 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. Since the new PMM8 is available in the same diameter size as competitor units, customers will often be able to reduce their energy costs by upgrading to the Flowserve motor. Because of the high power output, in many cases the 8-inch PMM8 design can be substituted for conventional 10-inch asynchronous motors. Customers who have installed the PMM technology at their sites are very satisfied with the economic performance. Flowserve is one of the few companies which have both submersible pump and submersible motor competencies including permanent magnet technology.
"The PMM8 as well as the PMM6 are examples of our ability to provide innovative products to better meet our customers' needs," said Jeff Drees, President, Industrial Product Operations, Flowserve. "The efficient operations and extended lives of the Flowserve PMM motors will help our customers in the water resources and general process industries combat rising energy costs."
The PMM8 is currently 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.