A two-speed high-voltage explosion-proof three-phase asynchronous motor with non-double pole design

Abstract

The invention discloses a double-speed high-voltage explosion-proof three-phase asynchronous motor adopting a non-double pole design, including a stator, a rotor, a bearing device and an end cover, the rotor is placed on the front and rear two bearing devices, the number of slots in the stator and the number of slots in the rotor The phase difference is four times the number of pole pairs with few poles. The stator winding includes multi-pole and few-pole two-layer windings. The upper and lower windings of the two layers are distributed and wound on the stator core. The rotor is connected with the same pole; and the rotor is provided with a chute, and gaskets are respectively placed between the top and bottom of the straight slot of the stator and the winding coil, and the top of the slot is fixed by a slot wedge. In the present invention, a double-winding structure is arranged in the stator core, thereby avoiding the generation of the harmonic magnetic field of the motor, ensuring that the motor can meet the electrical performance, and also ensuring that two sets of windings are placed on one iron core, thereby realizing the stability of non-multiple poles and different pole numbers The operation ensures the mixing quality of the mixer and meets the normal production needs of users.

Description

technical field [0001] The invention relates to the technical field of high-voltage motors, in particular to a double-speed high-voltage explosion-proof three-phase asynchronous motor with non-double pole design. Background technique [0002] In the fields of coal mining and petrochemical industry, high-voltage two-speed flameproof three-phase asynchronous motors are required, and the double-pole type is usually used, because the double-pole high-voltage two-speed flameproof three-phase asynchronous motor has a mature theoretical system , there is a reliable design method in electromagnetic design. [0003] There are great difficulties in the choice of slot fit and pitch for non-double-extreme high-voltage double-speed flameproof three-phase asynchronous motors. It is necessary to choose a suitable slot fit and pitch to meet both the performance of less-pole operation and the multi-pole operation. Extreme performance. In the field of petrochemical industry, double-extreme ...

AI Technical Summary

Problems solved by technology

In the field of petrochemical industry, double-extreme high-voltage double-speed flameproof three-phase asynchronous motors have great shortcomings. For example, double-extreme high-voltage double-speed flameproof three-phase asynchronous motors for driving crude p-toluic acid mixers often have problems. The device stirs at low speed before driving and at high speed after driving: before driving, when multi-pole stirring, the rotation speed is low and the stirring speed is insufficient, and the finished PTA is prone to waste products

When mixing with few poles, the rotating speed is too high, the stirring speed is too fast, and the finished PTA often has waste products; as a result, many manufacturers have to use expensive frequency conversion starting devices to solve this problem, but this is a big problem. increased production costs

[0004] In the field of electric motors, the stator windings of two-speed motors are all connected in a single way, but when the motor capacity is large, the use of a single way connection will cause production problems during use, especially the above-mentioned high temperature rise of the rotating motor and poor starting performance. The low-level problem cannot be overcome by the single-way connection winding of the motor, so how to use a multi-way connection two-speed double-winding motor is an urgent problem to be solved

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