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首页> 美国政府科技报告 >Cage Rotor Induction Machine with Controllable Power Factor
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Cage Rotor Induction Machine with Controllable Power Factor

机译：具有可控功率因数的笼式转子感应电机

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The machine can supply its own demands of reactive power. The need for condensers and/or phasecompensators can therby be eliminated or considerably reduced. This can be attractive if the machine is working as a generator in a wave converter, where distance to land often is considerable. Since the generator can work with a power factor almost equal to one, the consumption of copper for the transfer cable to land can be reduced quite essentially. This report presents briefly the basic principles of the SCIM-machine, covers derivation of the analytical expressions for the flux density in the airgap of the machine and gives the basis of calculation for the reactive power produced by the machine. In summing up, the following can be said about this new type of machine: a) It has been shown both analytically and experimentally that the machine can work with controllable power factor and under certain circumstances even supply the grid with reactive power. b) The machine is still at laboratory stage. The two test machines of conventional design which have been built, have been made by rewinding of conventional machines. Test results gained so far indicate that the aim to obtain a considerably improved power factor has been achieved in these machines, however at the expense of a somewhat lower efficiency. Since the mode of operation of the machine premises a certain discontinuity in the stator winding, it can be comprehended that the efficiency of such a machine always will be somewhat lower than in a conventional machine with about the same material. It is however possible that the improved power factor fully balances this drawback. (ERA citation 10:030609)

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