MRO Magazine

Variable-Speed Pump Drive Saves Energy

Variable-speed pump drives for machine tools from Rexroth cut life-cycle costs while meeting changing market requirements. In these drives, the closed-loop control is located in the converter. As a re...


December 1, 2008
By MRO Magazine

Variable-speed pump drives for machine tools from Rexroth cut life-cycle costs while meeting changing market requirements. In these drives, the closed-loop control is located in the converter. As a result, outside machining time and during partial load operation, the frequency converter reduces the speed of the electric drive and the fixed displacement motor, thereby reducing energy consumption, hydraulic power losses and noise emissions. Two variants are available. In the first, a highly dynamic servo motor provides the required torques at very short acceleration times. In the second, lower-cost variant, a standard a s ynchr onous motor assumes the drive function. Both fit seamlessly into decentralized and central control architectures of machine tools. Depending on the specific machine concept, the converters can be integrated in the control cabinet or mounted directly on the hydraulic power unit. Bosch Rexroth Canada

Reader Service Card No. 350


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