The efficiency of the motor is mainly determined during design and selection. If you need to work with high efficiency, you need to choose the correct servo control system, not the frequency conversion speed control system. You deserve the SINEE servo control system.
The factors that affect the working efficiency of the motor can be mainly divided into mechanical losses and electromagnetic losses. For example, for AC asynchronous motors, when current passes through the stator and rotor windings, copper losses and conductor losses will occur. The magnetic field in the iron will cause eddy currents, which will cause hysteresis losses. High-order harmonics of the air magnetic field will produce spurious loads on the load. Loss, there will be wear and tear on the bearings and fan during rotation.
Mechanical loss
Reduce rotor, stator losses and electronic iron losses
Effectively reducing the loss of the rotor is mainly related to the rotor resistance and the current passing through the rotor. To reduce the loss of the rotor, you can reduce the resistance of the rotor winding, use thicker wires with lower resistivity, or increase the slot cross-sectional area of the rotor. . There is also copper loss on the stator, which can increase the slot surface of the stator, increase the full slot ratio of the stator, and shorten the end length of the stator winding. If permanent magnets are used to replace the stator winding, there is no need to pass current. Of course, the efficiency can obviously be improved, which is also the fundamental reason why synchronous motors are more efficient than asynchronous motors in some production environments. Use cold-rolled silicon steel sheets to reduce the magnetic density, increase the length of the iron core to reduce the magnetic flux density, and add insulating coatings. In addition, the heat treatment process is also critical.
Electromagnetic losses
Motor stray losses and ventilation friction losses
High-order harmonics will produce stray losses in the windings and iron cores. The stator winding can be improved to reduce the generation of high-order harmonics. Insulation treatment can also be carried out on the surface of the rotor slots, and magnetic slot mud can be used to reduce the magnetic slot effect. . Measures such as selecting high-quality materials and optimizing design have been taken, and the ventilation structure has been reasonably designed, using axial flow or backward-inclined fans and higher-quality bearings.
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