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Large and medium power variable speed multi-squirrel cage three-phase asynchronous motor

A three-phase asynchronous, squirrel-cage technology, applied to asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of small inrush current, low lifting weight, slow lifting speed, etc., and achieve low manufacturing cost and low rotor temperature. Reduce, reduce the effect of inrush current

Active Publication Date: 2016-11-30
RONGCHENG CITY NUMERICAL CONTROL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the technical problems of the existing three-speed motors, such as low lifting weight, slow lifting speed, low safety when the three gears are lowered, instability during three-speed variable speed regulation, and large impact current. A large and medium-power variable-speed multi-squirrel-cage three-phase asynchronous motor with large lifting weight, stable lifting, fast speed, high safety during four or five gear down operations, and low impact current during pole-changing speed regulation

Method used

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  • Large and medium power variable speed multi-squirrel cage three-phase asynchronous motor

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no. 1 example

[0134] Corresponding motor parts not mentioned below adopt prior art.

[0135] The large and medium power variable speed multi-squirrel cage three-phase asynchronous motor of this embodiment is a 4 / 6 / 12 / 32 four-speed three-phase asynchronous motor, and its power corresponds to 32KW / 30KW / 17.5KW / 5.4KW respectively, and its frame size is 225, the number of stator core slots is 72 slots, the stator winding is composed of main winding and auxiliary winding, and there are 15 lead wires.

[0136] Such as figure 1 As shown, the main winding is a 4 / 32 pole two-speed winding, which is 2Δ / Y connection. The secondary winding is 6 / 12 poles, which is 2Y / Δ connection, and the following table 1 is the 4 / 6 / 12 / 32 pole four-speed winding arrangement table. The frame size is 225.

[0137] Table 1

[0138]

[0139]

[0140] Such as figure 2 As shown, it is a schematic diagram of rotor punching. The slot shape and slot configuration are designed as three squirrel cages with 58 slots acc...

no. 2 example

[0144] The large and medium power variable-speed multi-squirrel-cage three-phase asynchronous motor of this embodiment is a 4 / 6 / 8 / 12 / 48 five-speed three-phase asynchronous motor, and its power corresponds to 110KW / 75KW / 75KW / 52KW / 15KW respectively. The number is 355, the number of stator core slots is 108, the stator winding is composed of one set of main winding and two sets of auxiliary winding, and there are 16-27 lead ends in total.

[0145] The main winding is figure 1 The 4 / 6 / 8-pole three-speed winding shown is 2Y / 2△ / 2△ or 2Y / 2Y / 2Y connection.

[0146] The secondary winding is figure 1 The 12 / 48-pole two-speed winding shown is 4Y / 2Y connection.

[0147] The following Table 2 is the 4 / 6 / 8 / 12 / 48 pole five-speed winding arrangement table.

[0148] Table 2

[0149]

[0150]

[0151]

no. 3 example

[0153] The large and medium power variable speed multi-squirrel cage three-phase asynchronous motor of this embodiment is a 4 / 6 / 10 / 40 four-speed three-phase asynchronous motor, and its power corresponds to 60KW / 40KW / 40KW / 6.5KW respectively, and its frame size is 250 , the number of stator core slots is 90 slots, the stator winding is composed of one set of main winding and two sets of auxiliary winding, and there are 16-27 lead wires.

[0154] The following Table 3 is a 4 / 6 / 10 / 40 pole four-speed winding arrangement table.

[0155] table 3

[0156]

[0157]

[0158] This embodiment can also be realized by using 225, 280, 315, 355 or 400 machine bases instead of 250 machine bases.

[0159] The present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make multiple combinations of primary and secondary windings according to the above-mentioned content to form a multi-speed motor, such as figure 1 The windings shown are used as t...

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Abstract

The invention relates to a large and medium power variable-speed multi-squirrel-cage three-phase asynchronous motor, which solves the problems of the existing squirrel-cage three-speed motors with low lifting weight, instability during three-speed variable speed regulation, large impact current, and YZR winding motors. The technical problem of low safety during the descending operation, it is equipped with a stator, a rotor, and a machine base, the stator is equipped with a stator core and a stator winding, the rotor is equipped with a rotor core, and the stator winding is composed of a set of main windings and two sets of auxiliary windings , some of the windings are externally connected and short-circuited; the two sets of stator windings are 4 / 6 / 8 / 32 poles, 4 / 6 / 12 / 32 poles, 4 / 6 / 10 / 40 poles or 4 / 6 / 8 / 12 / 48 poles; the number of slots of the stator core and rotor core is 72, 90 or 108 slots; the outer diameter D of the stator core is: D=Φ*102~106%; the non-parallel teeth of the stator core The height H is: H=bt*0.3~0.6; the number of squirrel cages and squirrel rings of the rotor is more than two. The invention can be widely used in tower crane hoisting devices, cranes, mine hoisting, warehouses and freight yards, ship and ship anchor throwing and other equipment.

Description

technical field [0001] The invention relates to a motor, in particular to a large and medium power variable speed multi-squirrel cage three-phase asynchronous motor. Background technique [0002] Tower cranes or winches are often used in the construction of high-rise buildings. The hoisting motors used in them are required to be in the speed regulation mode, with low speed for heavy loads, high speed for light loads, and a wide range of speed regulation. [0003] The advantages and disadvantages of the above-mentioned hoisting motor speed regulation method will directly affect the performance of the whole machine. At present, there are three main types of special lifting motors: [0004] The first category is wound motors. Although this type of motor has high power and low starting current, it has the following problems: it is not safe when it is lowered (the tension of the wound motor is zero when the load is lowered); the manufacturing cost is high; the electrical contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K17/18H02K3/28H02K1/16
Inventor 王长春
Owner RONGCHENG CITY NUMERICAL CONTROL INSTR