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The motor connecting piece is a unique part of the three-phase asynchronous motor. According to the connection method of the three-phase motor, there are two kinds of triangle connection (hereinafter referred to as angle connection) and star connection (hereinafter referred to as star connection). The double voltage motor also needs star connection and angle. The conversion of the connection, which derived the connection piece and the terminal board matching problem, Dalan Motor Xiaobian today to communicate with you on this issue.
If a motor is connected to both the corner and the star, only a 6-column terminal block can be used, usually a 2-row, 3-column matrix arrangement. The column spacing is defined as A; the row spacing is defined as B.
Two-hole connecting piece:
The two-hole connecting piece is based on the design requirements of the corner joint and the star-connected mutual conversion. The two rows and three columns of six stud matrix six columns are connected according to A=B design. When the motor is star-connected, two connecting pieces are required, and when connecting the corners, there are three connecting pieces. However, when the problem is to be emphasized, the star connection in this mode should fully consider the horizontal state of the upper piece in the two lap joint process, that is, the reliability of the connection of the connecting piece is ensured by padding the spacer on the third column. .
Three-hole connecting piece:
The three-hole connecting piece is based on the principle that one piece is used for the star connection. The center distance of the terminal is 2A=B, one piece is used for the star connection, and three pieces are used for the corner connection. However, the problems that should be considered in this way include the influence of the mesopores of the connecting piece on the conductive area, and the influence of the thickness of the connecting piece in the star-connected state on the conductive area. In this mode, regardless of the corner or the star connection, the connecting piece can be in a flat state, and the adjustment problem of the spacer is not involved.
Control of creepage distance:
Whether it is widening or thickening the standard connecting piece, it is a measure to improve the conductive area, but taking this measure also considers the creepage distance between the connecting pieces and between the connecting piece and the junction box cover. Compliance.
Improvements in the connection piece:
Most of the connecting pieces are rectangular or semi-circular in shape. The connecting piece design restricts the space design of the wiring system. Many motor manufacturers have improved the connecting piece with the width of the via hole and the connecting piece. The idea of ​​calculating the conductive area by thickness, in this way, the conductive area of ​​the connecting piece is more reasonable, saving the material, increasing the aesthetics of the wiring system, and effectively increasing the spatial distance between the connecting pieces.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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