Variable-frequency speed-regualting triphase permanent-magnet synchronous motor

Abstract

This invention relates to a kind of three-phase AC permanent magnetic synchronous electric motor of variable-frequency timing containing a stator winding and a permanent magnet rotor etc. with the characteristics of adopting star-shaped connections by the stator winding, when designed basic frequency is 50Hz, 100Hz, 150Hz and 250Hz, and with reference of 50Hz the numbers of conductors of each phase winding of the motor stator should be 0.7, 0.58, 0.5 and 0.45 times of 50Hz, and the cross section areas of the conductors should be 1.414, 1.73, 2, and 2.24 times of 50Hz, the said rotor permanentmagnet and the magnet-conductive metal core share the perimeter of the rotor and the magnetic density generated by the permanent magnet should be one third of the density of the stator electric magnet. The numbers of the electric conductive

Description

technical field [0001] The invention relates to a three-phase AC permanent magnet synchronous motor. Background technique [0002] The traditional Y series asynchronous motor includes: stator, stator winding, rotor and casing, etc. This kind of motor has the following disadvantages: firstly, the copper loss and iron loss of the motor rotor are relatively large, and the two kinds of losses generally account for about 17% of the total loss. As the internal temperature rise of the motor decreases, the copper loss and iron loss of the stator The iron loss increases in direct proportion; the second is that the asynchronous motor has the disadvantage of large slip, generally within 10%, resulting in a reduction in motor efficiency and output power; the third is that the starting torque is small. Contents of the invention [0003] The frequency conversion speed regulation three-phase AC permanent magnet synchronous motor of the present invention can not only be frequency convers...

AI Technical Summary

Problems solved by technology

This kind of motor has the following disadvantages: firstly, the copper loss and iron loss of the motor rotor are relatively large. Generally, the two losses can account for about 17% of the total loss. As the internal temperature rise of the motor decreases, the copper loss and iron loss of the stator The iron loss increases in direct proportion; the second is that the asynchronous motor has the disadvantage of a large slip rate, generally within 10%, resulting in a reduction in motor efficiency and output power; the third is that the starting torque is small

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