Brushless motor controller system facilitating mos transistor heat radiation

Abstract

The invention provides a brushless motor controller system facilitating mos transistor heat radiation, and relates to the technical field of printed circuit boards. The brushless motor controller system facilitating mos transistor heat radiation comprises a shell and a motor body and a controller which are arranged in the shell. The motor body and the controller are electrically interconnected. The controller comprises a ventilation base, a first circuit board and a second circuit board. The mos transistors of the controller are arranged on the second circuit board. Other electronic components of the controller are arranged on the first circuit board. The first circuit board and the second circuit board are electrically connected. The ventilation base is provided with a ventilation port. The first circuit board and the second circuit board are arranged on the ventilation base. According to the brushless motor controller system facilitating mos transistor heat radiation, the mos transistors of high power consumption and high heat radiation are independently arranged on the second circuit board so that heat radiation and cooling of the mos transistors can be facilitated, increasing of power loss and even heat damage to the mos transistors can be avoided and the service life of the circuit system can be greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a brushless motor controller system which facilitates the heat dissipation of mos tubes. Background technique [0002] Due to volume reasons, in the existing lithium battery brushless power tools, the metal-oxide semiconductor field effect transistor (usually called mos tube) in the brushless controller, the English full name: Metal-Oxide-Semiconductor Field-Effect Transistor MOSFET) is packaged in the form of to-252 (Transistor Out-line-252). This packaging method is to paste the mos tube on the printed circuit board of the FR-4 epoxy glass fiber cloth substrate. Since the traditional FR4 or CM-3 PCB board is not heat-conducting, the heat dissipation effect of the mos tube is poor. figure 1 It is a structural schematic diagram of a mos tube in a controller of a brushless motor in the prior art. In the prior art, such as figure 1 As shown, an aluminum plate 10 is...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a brushless motor controller system that is conducive to the heat dissipation of mos tubes, so as to solve the problem that the poor heat dissipation effect of the printed circuit board of the lithium electric brushless electric tool in the prior art easily leads to increased power loss of the mos tubes or even Problems such as overheating damage

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