The present paper describes a newly developed method of computing the losses and efficiencies of hydrostatic power converters. Unlike previous methods, this approach is not based on a physical/technical analysis of a single hydraulic pump or motor type. Instead, it employs purely mathematical methods based on measurement data to provide a universally applicable method for computing the power and efficiency behavior of hydrostatic machinery of any design. The accuracy of the method is confirmed by a comparison of measured and calculated performance and efficiency data.
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