Permanent magnet brushless direct current frequency conversion axial flow fan

Abstract

The invention provides a permanent magnet brushless direct current frequency conversion axial flow fan. The permanent magnet brushless direct current frequency conversion axial flow fan comprises a fan frame, an impeller, a cover disk, a coil, a rotor iron core body, permanent magnets, a stator iron core body, a PCB and a heat dissipation frame. The permanent magnet brushless direct current frequency conversion axial flow fan is characterized in that the heat dissipation frame is made of an aluminum alloy material; the PCB is a round printed board of which the center is provided with a hole; a dual-core single chip microcomputer, a front driving chip and a VMOS power pipe are welded to the PCB, and the heat dissipation surface of the PCB is fixed to a hexagonal frame at the center of the heat dissipation frame through screws in a horizontal installation mode; the cover disk is a hollow cylinder of which the middle is provided with an isolation plate; the center of the isolation plate is provided with a bearing B installation step; and the isolation plate divides the cover disk into two parts. The fan and motor integrated permanent magnet brushless direct current frequency conversion axial flow fan scheme provided by the invention represents the development direction of permanent magnet brushless direct current frequency conversion axial flow fans and is quite broad in application prospect.

Description

technical field [0001] The invention relates to a permanent magnet brushless DC frequency conversion axial flow fan, which is mainly used for ventilation, cooling, drying and dehumidification of fixed or mobile equipment. Background technique [0002] A fan in which the gas flows parallel to the axis of rotation of the fan is called an axial fan. Commonly used electric fans and air conditioner fans are fans that operate in an axial flow mode. For example, electric fans used for cooling are all electrical equipment placed in a fixed position to make air flow. The room temperature wind blown out by it can accelerate the evaporation of human sweat and reduce the body surface temperature, so it is widely used. Generally speaking, since the axial flow fan does not change the flow direction of the air medium, it is usually used in occasions with high gas flow requirements and low pressure requirements, that is, the so-called occasions with large air volume and low resistance: n...

AI Technical Summary

Problems solved by technology

However, this type of driving method limits its scope of application because it uses AC power. Generally, it can only be used in fixed occasions where AC power exists, and the fan speed can only be adjusted by changing the coil voltage and dividing it into several fixed gears.

Axial flow fans driven by series-excited AC and DC motors can also be used in mobile equipment, but there are brushes and mechanical commutators inside, which are particularly prone to damage due to carbon deposits

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