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Variable speed drive motor power supply design

3,17,19 harmonic winding factor shown in Table 2. Table 2 shows, the use of this low harmonic harmonic winding can reduce the influence of satisfaction, the utility also received good results, so that the motor performance is improved. With this low harmonic winding,[link widoczny dla zalogowanych], also 4, 2005 Textile Research 【93】 Table 2 fundamental and the harmonic winding factor harmonic / sub-harmonic winding factor / time winding factor 1O. 9213O. O85017O7O190l10.09 can reduce the requirements on the drive to make low-level inverter drive to achieve high quality performance, and can make the frequency of the electromagnetic motor load reached the level of general motors to improve the utilization of the material. 2.3 Stator insulation is designed to improve the reliability of motor, inverter power supply high-speed drive motor insulation rating than the actual level of high-level work. Prototype Class F insulation class according to the design and day-level processing. Converter supply high-speed drive motor insulation treatment, the key is the dipping process of winding, vacuum pressure should be used in the dipping process. 2.4 The design of the stator core design of the main considerations stator core iron loss P ... by type (5) said: P = B (5) where, B is magnetic flux density; K is a constant; plant for the magnetic flux of alternating frequency. When conditions permit, should select the appropriate core length, flux density, stator groove and silicon materials to reduce the iron loss. Prototype design, the magnetic flux density obtained 1.30 ~ 1.52T, magnetic power frequency load size on the low-frequency performance of high-speed drive motor and the temperature influenced the design should be careful, preferably not more than 1.52T, For low harmonic winding prototype, real take 1.52T. 2.5 The design of the motor air gap air gap choice of the main considerations arising from the motor at high speed deformation, the value of choice than a large motor, the prototype design for the 0.4mm3 3.1 rotor motor rotor slot number z: Design To reduce the additional torque generated in the motor, reducing stray loss,[link widoczny dla zalogowanych], z selection and z. The tie should be avoided following]: lZl-Z2l = 0, P ± 1,2 P, 2P ± 1,[link widoczny dla zalogowanych],2 P ± 2,, ± 1 (6) According to equation (6) and experience,[link widoczny dla zalogowanych], high-speed drive motor rotor slot number the choice of z and z. The tie should be used with the principle of far slot, such as diodes prototype motor take 36/28, 48/40 and other slot with. 3.2 Rotor skewed rotor design chute can effectively weaken the teeth harmonics and reduce the additional synchronous torque motor designed for high-speed drive is the larger frequency range of variable speed motor, the rotor skewed one stator slot pitch is greater than better get 1.13 times the prototype rotor skewed stator slot pitch. 3.3 The design of the rotor core design of the rotor core, should be selected trough the rotor and the rotor flux density to reduce losses and increase the launch capability. Prototype design, the rotor flux density obtained 1.3 ~ 1.5T, under normal circumstances,[link widoczny dla zalogowanych], should be lower than the stator flux density. Trough-shaped slot with the rotor blade. 3.4 Bearing selection and design of the bearing chamber textile speed drive motor variable frequency power supply, high operating speed, bearing heating, so the selection of P Precision angular contact spindle bearings, cylindrical bearings and bearing chamber clearance fit with the check. 4 prototype experimental prototype trial scheme: the number of stator slot z = 36, the rotor slot number Z = 28, Y = 15 slot winding pitch, stator winding conductors choose a different number of slot reasonable, and can reduce the harmful low harmonic harmonic winding, air gap g = 0.4mm, the stator and rotor tooth flux density of about 1.52T, the rotor blade-shaped trough with trough. Trial 2 prototype in the factory = 90Hz, U = 90V, T = 6.8N · m when the measured motor performance shown in Table 3. Table 3 shows the performance index prototype, the prototype of the experimental results compared with similar foreign motor, efficiency and power factor are higher than foreign motor performance is better than similar foreign motor. 5 Conclusion According to the inverter power supply features high-speed drive motors, motor design principles and manufacturing process requirements, a weakening of the low harmonic high harmonic winding design methods and processes, and applied to the design of high-speed driving motor in. The results from the prototype and the user's use of that design using low harmonic winding performance of the prototype design is superior to similar foreign motor performance, meet user requests.
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