Three-phase asynchronous motors with single-layer windings
Release time:
2023-12-07 16:03
Source:
Single-layer winding is a winding in which only one effective side of the coil is embedded in each slot of the stator, thus its total number of coils is only half of the total number of slots in the motor. The advantages of single-layer winding are that the number of winding coils is small and the process is relatively simple; there is no interlayer absolute edge so that the utilization rate of the slot is improved; the single-layer structure will not occur between the phase breakdown faults. The disadvantage is that the electromagnetic waveform generated by the winding is not ideal, the motor's iron loss and noise are larger and starting performance is also slightly worse, so the single-layer winding is generally only used for small-capacity asynchronous motors. Single-layer winding in accordance with the shape of its coil and end connection part of the arrangement of different, can be divided into chain winding, cross-chain winding, concentric winding and cross concentric winding and other forms of winding.
1、Chain winding
Three-phase asynchronous motor
Three-phase asynchronous motor [8]
Chain winding is composed of single-layer coil elements with the same shape and width, which is named because each coil at the end of the winding is like a chain ring. Single-layer chain winding should pay special attention to the coil pitch should be an odd number, otherwise the winding will not be arranged.
2, cross-chain winding
Cross-chain winding when each pole and each phase of the number of slots 9 for more than 2 odd number of chain winding will not be able to arrange the arrangement, it is necessary to use a single, double-coil cross winding.
3、Concentric winding
Concentric winding in the same pole phase group of all the coils around the same center.
4、Crossed concentric winding
When the number of slots in each phase of each stage Q is more than 2 even number can be taken in the form of concentric winding.
Single concentric winding and cross concentric winding advantages for the winding of the winding, embedded line is relatively simple, the disadvantage is that the coil end is too long too much wire consumption. Now, in addition to the occasional use in small-capacity 2-pole, 4-pole motors, nowadays has been rarely used in this form of winding.
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