| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We developed a technique in which the number of poles in a permanent magnet (PM) motor is varied to reduce energy consumption. We explain the principle involved and the basic characteristics of the pole-changing motor using a magnetic field analysis, which consists of a PM magnetized by a pulse d-axis current in the armature winding. Our results show that the proposed motor reduces iron loss by about 50 %, has double the speed range, and has high efficiency over a wide speed range. Furthermore, we manufactured a principle model of the electronics motor capable of pole changing in order to verify a function of pole changing. The electronics motor has each armature coil that connects each inverter circuit in order to control the current of the coil. Our results of the experiment confirmed that the motor can change poles during rotation. Therefore, the proposed motor can be utilized in a variable-speed drive system for high performance and efficiency.
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