| 简介 |
PROBLEM TO BE SOLVED : To obtain a permanent magnet motor which makes the selection of a reluctance torque and a magnetic flux density wide, which can be made less expensive, and which obtains an adaptive motor. SOLUTION : In an inner rotor permanent magnet motor, permanent magnets are buried in a rotor core 10 so as to match the number of magnetic poles, and the respective magnetic poles are constituted of three each of permanent magnets 11, 12. The permanent magnets 11 are formed in such a way that the cross section of each rare-earth magnet is rectangular (thin and sheet-like), and the magnets in the number corresponding to the number of magnetic poles are arranged along the circumference of the inside diameter of the core 10. The permanent magnets 12 are formed in such a way that the cross section of every ferrite magnet is rectangular (thick and sheet-like), and the permanent magnets are arranged on boundaries of the magnetic poles by the permanent magnets 11. That is to say, the permanent magnets 12 through ferrite magnets are used in common with adjacent magnetic poles. The respective magnetic poles are constituted of the permanent magnets 12 and the permanent magnets 11, regions in which the magnets do not exist are made wide, and a q-axis inductance is made large, as compared with a d-axis inductance. |
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