A permanent magnet brushless DC motor with a built-in controller for range hoods

Abstract

The invention discloses a permanent magnet brushless direct-current motor and controller assembly for a range hood. The permanent magnet brushless direct-current motor and controller assembly consists of an upper end cover part and a lower end cover part, wherein the lower end cover part comprises a lower end cover housing, a rotary shaft, a sheathed stator iron core body, coils, a rotor iron core body, neodymium-iron-boron permanent magnet blocks, an upper bearing and a lower bearing; and the upper end cover part comprises an upper end cover housing, a lining bracket, a cover plate, a PCB, a dual-core single-chip microcomputer and a cable wire. The permanent magnet brushless direct-current motor and controller assembly for the range hood is mainly characterized in that the permanent magnet brushless direct-current motor and controller assembly for the range hood is decomposed into two major parts of electromagnetic parts and mechanical parts; the electromagnetic parts and the mechanical parts of a motor are packaged in the lower end cover housing; a controller part is packaged in the upper end cover housing; a mechanical-electrical integration structure is formed after the upper and lower end cover housings are combined; a single-phase capacitance running type asynchronous motor and an external control circuit in a conventional range hood can be directly replaced; and a general range hood is directly transformed into a large-suction-force range hood, so that the energy-saving and noise-reducing effects are remarkable and the market prospect is wide.

Description

technical field [0001] The invention relates to a permanent magnet brushless DC motor adapted to a built-in controller for a range hood, which is a core control component in a new type of kitchen electrical equipment for purifying the kitchen environment. Background technique [0002] The range hood is a kind of kitchen electrical equipment, which is usually installed above or on the side wall of the kitchen stove. Outdoors, reduce pollution and purify indoor air. [0003] The working principle of the range hood is to turn on the power supply of the range hood and drive the motor to make the centrifugal wind wheel rotate at a high speed, and a spiral wind pressure difference is generated in the volute, and the air between the blades is drawn from the center of the impeller under the action of centrifugal force. Throw it to the outer edge of the impeller, leave the impeller at a high speed, enter the volute and flow along its inner wall, so that a negative pressure area is f...

AI Technical Summary

Problems solved by technology

[0008] Although the permanent magnet brushless DC motor for the range hood has the advantages of simple structure, reliable operation, high efficiency, no excitation loss, good speed regulation performance, large starting torque and low noise, it directly replaces the single-phase motor in the range hood. There are also many problems in the capacitor-operated asynchronous motor: for example, the permanent magnet brushless DC motor system usually consists of two parts, the motor and the controller. The brushless DC motor itself cannot be used alone, and it must work under the control of the controller. Due to the traditional There are many wiring harnesses connected between the permanent magnet brushless DC motor body and the separate controller, so it is very inconvenient to use

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