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Inner radiating type brushless DC (direct current) motor

A brushless DC motor and heat dissipation technology, which is applied in the direction of electric components, electrical components, electromechanical devices, etc., can solve the problems of accelerated aging of wires and electronic components, low control precision of controllers, and poor structure compactness, etc., and achieve light weight , Improve the heat dissipation area and reduce the inertia effect

Active Publication Date: 2013-02-06
ZHEJIANG XINLI ELECTRIC APPLIANCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The first purpose of the present invention is to provide an internal heat dissipation brushless DC motor with a light weight rotor and the rotor can generate heat dissipation and air discharge, which not only solves the problems caused by the heavy rotor weight and large inertia of the existing brushless DC motors. It also solves the problem of poor structure compactness caused by the heat dissipation of the existing brushless DC motor through the external fan
[0008] The second object of the present invention is to provide a brushless DC motor with overload protection through the mechanical structure, which solves the problem that the overload protection of the existing brushless DC motor through electrical components will cause damage to the wires and electronic components. Problems of accelerated aging, poor timeliness, and poor reliability

Method used

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  • Inner radiating type brushless DC (direct current) motor
  • Inner radiating type brushless DC (direct current) motor
  • Inner radiating type brushless DC (direct current) motor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment one, see figure 1 , an internal cooling type brushless DC motor, including a motor body and a controller 4. The motor body includes an outer casing 11 , an outer stator 12 disposed on the outer casing 11 , and an inner rotor 14 located inside the outer stator 12 and supported on the outer casing 11 through a rotating shaft 13 . A bearing 15 is provided at the joint between the casing 11 and the rotating shaft 13 .

[0028]The rotating shaft 13 protrudes into the casing 11 from the right end of the casing 11 . A plurality of air outlet channels 111 are provided on the right end of the casing 11 . The air outlet passages 111 are distributed along the circumference of the housing 11 . The outlet 1111 of the air outlet channel is disposed on the peripheral surface of the housing 11 . The air outlet channel 111 is an oblique channel whose outlet end is inclined away from the outer stator 12 . A receiving chamber 112 is defined at the left end of the housing 1...

Embodiment 2

[0032] Embodiment two, see Figure 4 , the difference from Embodiment 1 is that it also includes a hydraulic overload protector. The rotating shaft 13 includes a first shaft 131 and a second shaft 132 . The first shaft 131 and the second shaft 132 are coaxial.

[0033] The hydraulic overload protector includes a mounting frame 21 , a crankshaft 22 and a pair of hydraulic cylinders 23 .

[0034] The installation frame 21 includes a left support base 211 , a right support base 212 and a connecting frame 213 connecting the left support base 211 and the right support base 212 together. The left supporting seat 211, the right supporting seat 212 and the connecting frame 213 form a frame structure. The crankshaft 22 and the hydraulic cylinder 23 are located inside the mounting frame 21 .

[0035] The crankshaft 22 includes a main shaft 221 and a connecting rod shaft 222 . The main shaft 221 includes a left main journal 2211 and a right main journal 2212 . The distance between ...

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Abstract

The invention relates to a motor and provides an inner radiating type brushless DC (direct current) motor. The motor comprises a motor body and a controller connected on the motor body, wherein the motor body comprises a shell, an outer stator and an inner rotor; the outer stator is arranged on the shell; the inner rotor is arranged in the outer stator and is supported on the shell via a rotating shaft; a radiating cavity is arranged in the inner rotor; a plurality of radiating and air exhausting vanes are arranged on the wall of the radiating cavity; and air inlet channels and air outlet channels, which are communicated with the radiating cavity, are arranged on the shell. The inner radiating type brushless DC motor is characterized in that the rotor is light and can realize radiating and air exhausting effects. By adopting the inner radiating type brushless DC motor, the problems that the existing brushless DC motor rotors have heavy weight and great inertia and cause low control precision of controllers and the problem of poor structure compactness caused by that the existing brushless DC motors adopt exterior fans for radiation are solved.

Description

technical field [0001] The invention relates to a motor, in particular to a DC brushless motor. Background technique [0002] The brushless DC motor is a kind of synchronous motor. The speed of the motor rotor is affected by the speed of the rotating magnetic field of the motor stator and the number of poles (P) of the rotor: n=60* f / P. When the number of poles of the rotor is fixed, changing the frequency of the stator's rotating magnetic field can change the speed of the rotor. A brushless DC motor is a synchronous motor with an electronic control (controller) to control the frequency of the stator's rotating magnetic field and feed back the speed of the motor's rotor to the control center for repeated corrections, in order to achieve a method close to the characteristics of a DC motor. That is, the brushless DC motor can control the motor rotor to maintain a certain speed when the load changes within the rated load range. [0003] The existing brushless DC motors ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/32H02K5/20
Inventor 杨开生
Owner ZHEJIANG XINLI ELECTRIC APPLIANCE TECH CO LTD
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