Winding of asynchronous motor with five-phase power supply
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A technology for asynchronous motors and windings, applied to asynchronous induction motors, the shape/style/structure of winding conductors, electromechanical devices, etc., can solve the problems of increasing system switching losses, etc., to weaken harmonic times, improve harmonic components, reduce noise effect
Active Publication Date: 2019-06-11
HARBIN UNIV OF SCI & TECH
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Problems solved by technology
The second challenge appears in the field of low-power speed regulation, and we can see two development trends that are slightly emerging
The third challenge arises in the field of integrated frequency control system
However, in a three-phase system, in order to eliminate the six torque ripples that occur when the six-step ladder wave voltage inverter supplies power, it is necessary to use a high switching frequency PWM method, which will undoubtedly increase the switching loss of the system
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specific Embodiment approach 1
[0029] Specific implementation mode one: combine Figure 1-Figure 3 To illustrate this embodiment, a power supply of this embodiment is a five-phase asynchronous motor winding, the number of stator slots is 40, the number of poles is 4 poles, and a single-layer winding. From the inside of the motor, there are 10 branches in total, which are respectively A1, A2, B1, B2, C1, C2, D1, D2, E1, E2; each branch is composed of two coils, and the pitch of each coil is an integral pitch, and the head end of A1 branch is marked as a1, The tail end is marked as a2; the head end of the A2 branch is marked as a3 and the tail end is marked as a4; the head end of the B1 branch is marked as b1 and the tail end is marked as b2; the head end of the B2 branch is marked as b3 and the tail end It is marked as b4; the head end of C1 branch is marked as c1, and the tail end is marked as c2; the head end of C2 branch is marked as c3, and the tail end is marked as c4; the head end of D1 branch is marke...
specific Embodiment approach 2
[0031] Specific implementation mode two: combination image 3 To illustrate this embodiment, a power supply of this embodiment is a five-phase asynchronous motor winding, and the A1 branch is composed of two coils, of which 1-31 are connected to form the first coil, and 21-11 are connected to form the second coil , and then connect the two coils in series, that is, connect the tail end 31 of the first coil to the head end 21 of the second coil, and lead out from the head end 1 of the first coil and the tail end 11 of the second coil. Get the head end a1 and tail end a2 of the A1 branch;
[0032] The A2 branch is composed of 2 coils, among which 2-32 are connected to form the first coil, 22-12 are connected to form the second coil, and then the two coils are connected in series, that is, the tail end 32 of the first coil is connected to the second coil. The head ends 22 of the two coils are connected, drawn from the head end 2 of the first coil and the tail end 12 of the secon...
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Abstract
The invention discloses an asynchronous motor winding with five-phase power sources, and belongs to the technical field of motors. The asynchronous motor winding is characterized in that the asynchronous motor winding is provided with 40 stator slots and 40 poles, is a single-layer winding and is totally provided with 10 branch circuits A1, A2, B1, B2, C1, C2, D1, D2, E1 and E2 as seen from the inside of a motor, each branch circuit comprises two coils, and each coil has integral pitch; one end of the branch circuit A1, one end of the branch circuit B1, one end of the branch circuit C1, one end of the branch circuit D1 and one end of the branch circuit E1 are connected with one another to form a common point O and are not led out; the other end of the branch circuit A1, the other end of the branch circuit B1, the other end of the branch circuit C1, the other end of the branch circuit D1 and the other end of the branch circuit E1 are outwardly led out, are denoted as A, B, C, D and E and have mutual difference of 72 electric degrees. The asynchronous motor winding has the advantages that the asynchronous motor winding is a twenty-phase system as seen from the inside of the motor andis a five-phase system as seen fro the outside of the motor, harmonic components can be reduced to a great extent by the asynchronous motor winding with the connection, accordingly, noise can be lowered, vibration, stray loss and harmonic torque can be reduced, and effective materials can be saved; the asynchronous motor winding has practical engineering application significance, tertiary harmonic currents can be injected into the motor while the motor is filled with fundamental currents, the ferromagnetism saturation of the motor can be reduced after the tertiary harmonic currents are injected into the motor, and the ferromagnetic material utilization rate and the torque density of the motor can be increased.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a winding of an asynchronous motor with a five-phase power supply. Background technique [0002] Asynchronous motors have inherent advantages such as simple structure, good mechanical strength, reliable operation, and convenient maintenance. The rapid development and increasing maturity of power electronic power devices and modern drive technology make up for their shortcomings in starting and speed regulation performance, making asynchronous motors The electric motor has become the most widely used electric motor at present. However, the status of three-phase asynchronous motors has been challenged to some extent, which is manifested in three aspects. The first challenge is related to the high-power speed regulation system with a rated capacity of several megawatts. High-power motor speed control system is widely used in fans, pumps, compressors, cement mills, rolling mills, min...
Claims
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