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EFFICIENCY OPTIMISATION IN CURRENT CONTROLLED VARIABLE-SPEED SWITCHED RELUCTANCE MOTOR DRIVES
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| Author(s) |
P. C. Kjaer; F. Blaabjerg; C. Cossar; T. J. E. Miller |
| Abstract |
This paper describes a new Efficiency Optimisation Algorithm for variable-speed Switched Reluctance Motor drives operated in current control. A thorough analysis of the average torque production in current controlled SR drives is made with respect to the parameters current reference, angular velocity and firing angles. It is shown that a true optimum efficiency can be found using the tum-off angle in a
slow control loop, while operating with a faster closed-loop speed control. The power flow is measured and minimised in the DC-link, while the speed controller maintains a constant output power. Simulation results show up to 6% gain in efficiency. Test results show on-line efficiency maximisation without
loosing dynamic performance. They also show that a global minimum is reached by the on-line search.
The method established is completely independent of the machine topology and operating conditions, and as such applicable to any current controlled variable-speed Switched Reluctance Motor drive. |
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| Filename: | Unnamed file |
| Filesize: | 610.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-12 by System |
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