塊状磁極形同期電動機の始動特性推定法

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  • A prediction of starting performance of solid poles synchronous motor.
  • カイジョウ ジキョクケイ ドウキ デンドウキ ノ シドウ トクセイ スイテイホ

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It is almost impossible to measure the starting performance of middle and large synchronous motors in a factory, bacause it needs a large capacity of equipments to test its performance. <br>A new method is required to predict this performance by simple tests using a small capacity. This will make the motor's design and its accessories more rationalized. <br>Authors propose a new method which is the combination of single phase AC applied test and usual routine test of synchronous machines. <br>The key points of this method are summarized as follows: <br>(1) A single phase voltage with commercial frequency is applied to armature terminals in a standstill condition. And this test must be performed twice in the same gap voltage, one for short-circuiting the field winding, the other for joining a resistance between the field terminals. Using these two test data including input power, the field and the damper winding impedances are separated from each other. <br>(2) Solid poles resistance and reactance changes with a magnetic flux density and frequency. Therefore, authors assume the impeadance of solid poles to be a function of magnetic flux density and frequency from actual test values.<br>The starting performance of a synchronous motor is predicted and agreed with actual data.

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