| Improvement of adjustable speed drive system efficiency is important not only from the viewpoint of energy saving and cooling system operation, but also from the broad perspective of environmental pollution. This paper studies the variable-voltage energy saving theory and its implementation for asynchronous motor with light load, compares several kinds of scheme of improving efficiency in detail and confirms the variable-voltage energy saving method, That is adjusting the input voltage by detecting the iron loss and copper loss of motor directly. In addition, the directness*, simpleness and availability of the method are verified by the emulational experimental results with SIMULINK of the MATLAB. The circuit of the general inverter based on the TMS320F240 DSP was used in this paper, and the practicable program was compiled. A prototype was made and tested. And the result indicated the control method is credible and the program runs well. It is practical and effective for the application of energy saving technology for induction motors. |
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