Comparison of electric motor types for realising an energy efficient pumping system

Energy efficiency in pumping is partially affected by the electric motor efficiency. In addition to low losses, the chosen electric motor type should have feasible reliability and dimensions for pumping systems. This paper studies the applicability of common electric motor types to a future pumping system by comparing motor characteristics with each other; both a qualitative and quantitative evaluation is performed for a 15 kW induction, synchronous reluctance and permanent magnet synchronous motor. Another main object of this paper is to provide basic information for designing a next generation, more energy efficient pumping system.