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A method for realizing single and double star-delta connection switching of a motor by using a double-outlet box

A wiring method and outlet box technology, applied in the shape/style/structure of winding conductors, can solve the problems of overlapping wiring, complicated wiring, large outlet box, etc., and achieve the effect of reducing restrictions and simple wiring.

Active Publication Date: 2018-12-28
东方电气(德阳)电动机技术有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are some problems in this method: firstly, for medium and large AC motors, the voltage level is usually higher, considering the safe discharge distance, 12 leads are in the same outlet box, and the outlet box body will be made very large; secondly, the same outlet box The wiring is relatively complicated, and there are many overlapping and crossing wirings. For example, there are bound to be many external cable connections at the operation site, and the leads at the wiring site are chaotic and irregular.

Method used

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  • A method for realizing single and double star-delta connection switching of a motor by using a double-outlet box
  • A method for realizing single and double star-delta connection switching of a motor by using a double-outlet box
  • A method for realizing single and double star-delta connection switching of a motor by using a double-outlet box

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Embodiment 1

[0031] As one of the most basic implementations of the present invention, a wiring method for realizing single and double star delta connection switching of motors using double outlet boxes is disclosed, such as Figures 1 to 8 , Divide 4 lead-out joints and 3 transition joints of each phase of the three-phase stator winding of the motor into two groups and introduce them into two outlet boxes respectively, among which 2 lead-out joints for each phase of the three-phase stator winding, a total of 6 lead-out joints One group of joints is introduced into one outlet box, and the remaining 2 for each phase, a total of 6 outlet joints and 3 transition joints are used as another group to be introduced into another outlet box; select from the first group for each 1 phase, a total of 3 lead-out connectors are short-circuited with 3 transition connectors in the other group inside the motor, and these 3 lead-out connectors are used as external power supply terminals, and the lead-out conne...

Embodiment 2

[0033] As one of the most basic implementations of the present invention, a wiring method for realizing single and double star delta connection switching of motors using double outlet boxes is disclosed, such as Figures 1 to 8 , respectively use U, V, W plus numbers 1, 2, 3, 4 as subscripts to represent 4 lead-out joints of each phase of the three-phase stator winding of the motor, a total of 12 lead-out joints;

[0034] Such as figure 2 , two outlet boxes are used, respectively marked as 1# outlet box and 2# outlet box, among which three transition joints of the motor are introduced into the 2# outlet box, and the three transition joints are represented by letters A, B, C; the motor stator Winding U 1 , V 1 , W 1 , W 4 , U 4 , V 4 Lead the six outlet joints to the 1# outlet box, connect the U 2 , V 2 , W 2 , U 3 , V 3 , W 3 These six lead-out connectors lead to the 2# outlet box, and the lead-out connector U in the 1# outlet box 1 , V 1 , W 1 Short-circuit wi...

Embodiment 3

[0041] The motor has a total of 15 leads, such as Figures 1 to 8 , of which 6 leads lead to the 1# outlet box, respectively U1, V1, W1, W4, U4, V4; 9 lead heads lead to the 2# outlet box, respectively U2, V2, W2, U3, V3, W3, A, B, C. Among them, U1, V1, and W1 in the 1# outlet box are respectively short-circuited inside the transition joints A, B, and C of the 2# outlet box.

[0042] When the stator winding of the motor needs to be connected at a single angle, U1, V1, and W1 of the 1# outlet box are respectively connected to W4, U4, and V4 of the 1# outlet box; U2, V2, and W2 of the 2# outlet box are respectively connected to the 2# outlet U3, V3, and W3 in the box. A, B, and C in the 2# outlet box are not connected. U1, V1, and W1 in the 1# outlet box are used as the external power supply terminals. At the same time, because U1, V1, and W1 in the 1# outlet box are respectively connected to the transition joints A, B, and C of the 2# outlet box, they are short-circuited ins...

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Abstract

A method for realizing single and double star-delta connection switching of a motor by using a double-outlet box belongs to the technical field of motor stator winding wiring. Totally 12 lead-out connectors, 4 for each phase, and 3 transition connectors of a three-phase stator winding of a motor are divided into two groups and introduced into two outlet boxes respectively. In the three-phase stator winding, two lead-out connectors are taken for each phase, totally six lead-out connectors are taken for one group into one outlet box, and the remaining two lead-out connectors, totaling six lead-out connectors and three transition connectors are taken for the other group into another outlet box. One per phase is selected from the first group, a total of three lead-out connectors are respectively short-circuited with three transition connectors in another group inside the motor, and the three lead-out connectors are used as external power supply access terminals to connect the lead-out connectors and the transition connectors to realize single-delta connection, single-star connection, double-star connection and double-delta connection of the motor through lead-out connectors and transition connectors.

Description

technical field [0001] The invention belongs to the technical field of motor stator winding wiring, and in particular relates to a wiring method for realizing switching between single and double star delta connections of motors by using double outlet boxes. Background technique [0002] In the field of motor technology, the wiring methods of motor stator windings are generally star connection (Y) and delta connection (△). In some special applications, the external voltage of medium and large three-phase AC motors needs to be connected according to different requirements. When converting, it is necessary to realize Y-2Y-△-2△ four stator winding wiring conversions, so as to meet the four different operating states of the motor. In order to meet the conversion of the four operating states, each phase of the motor adopts a double-segment winding, that is, each phase winding is made into a double-segment winding to realize the wiring conversion of the four stator windings of Y-2Y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
CPCH02K3/28
Inventor 冯德洋孙小刚
Owner 东方电气(德阳)电动机技术有限责任公司
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