Abstract
A large part of the produced electrical energy is consumed by ventilators, pumps and compressors, the so-called HVAC applications. A lot of this energy can be saved by speed control, but even with the large saving obtained alone by introduction of variable speed, it is still essential to optimize the control of the variable speed drive and to optimize the electrical machine with respect to efficiency. Experiments are made with energy optimal induction motor control on a 2.2 kW variable speed pump system. It is demonstrated that 10 % of the consumed energy can typically be saved by energy optimal motor control compared with constant V/Hz control. In a comparison of induction motors and permanent magnet synchronous motors for a variable speed pump application it is shown that for 2.2 kW motors an investment in high efficiency or PM motors are typically paid back within 2.5 years and 7 years respectively. For a 90 kW PM motor the pay-back time would be 24 years. It is today not profitable to use PM motors for variable speed HVAC applications above 2 kW rated motor power. A further study is required to determine this limit in power rating more precisely.
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References
Abrahamsen, F., Blaabjerg, F., Pedersen, J.K., Grabowski, P., Thøgersen, P. (1998): On the Energy Optimized Control of Standard and High-Efficiency Induction Motor in CT and HVAC Applications. IEEE Trans, on Ind. Appl., Vol. 34, No. 4, Jul/Aug 1998, pp. 822–831.
Abrahamsen, F. (1998): Energy Optimal Control Strategies for Electro Motors, technical report (268 pages), Aalborg University, Institute of Energy Technology, Pontoppidanstraede 101, DK-9220 Aalborg East, ISBN 87-89179-23-4.
Abrahamsen, F., Birk, J., Blaabjerg, F., Pedersen, J.K. (1999): Comparison of Induction and PM Motor Efficiency in HVAC Applications. Proceed, of EPE’99, Lausanne, Sep. 7-9.
Abrahamsen, F. (1999): Energy Optimal Control of Induction Motors, Ph.D. dissertation, Aalborg University, Institute of Energy Technology, Pontoppidanstraede 101, DK-9220 Aalborg East, ISBN 87-89179-26-9.
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© 2000 Springer-Verlag Berlin ⋅ Heidelberg
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Abrahamsen, F., Blaabjerg, F., Pedersen, J.K. (2000). Efficiency Improvement of Variable Speed Electrical Drives for HVAC Applications. In: Bertoldi, P., de Almeida, A.T., Falkner, H. (eds) Energy Efficiency Improvements in Electronic Motors and Drives. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59785-5_14
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DOI: https://doi.org/10.1007/978-3-642-59785-5_14
Publisher Name: Springer, Berlin, Heidelberg
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