WO2017028529A1 - 无刷电机的散热结构 - Google Patents

无刷电机的散热结构 Download PDF

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Publication number
WO2017028529A1
WO2017028529A1 PCT/CN2016/077173 CN2016077173W WO2017028529A1 WO 2017028529 A1 WO2017028529 A1 WO 2017028529A1 CN 2016077173 W CN2016077173 W CN 2016077173W WO 2017028529 A1 WO2017028529 A1 WO 2017028529A1
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Prior art keywords
heat dissipation
brushless motor
air inlet
fan
motor
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PCT/CN2016/077173
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English (en)
French (fr)
Inventor
焦万春
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常州格力博有限公司
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Publication of WO2017028529A1 publication Critical patent/WO2017028529A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices

Definitions

  • the invention relates to the field of brushless motors, and in particular to a heat dissipation structure of a brushless motor for a lawn mower.
  • the heat dissipation of the traditional brushless motor on the market is based on natural wind without a fan, or the fan only sends heat to the motor.
  • the motor is easy to emit a large amount of heat and easily burns the motor, and the MOS tube of the motor control board emits a large amount of heat, which is easy to burn the MOS tube.
  • the present invention mainly provides a heat dissipation structure of a possible brushless motor that reduces the occurrence of burnout of a motor or a motor control board when the lawn mower is heavy.
  • a technical solution adopted by the present invention is to provide a heat dissipation structure of a brushless motor, comprising: a motor control board and a brushless motor, wherein the brushless motor cover is provided with a wind hood, and the hood is provided with an air outlet and an air inlet, and is close to the air inlet.
  • the motor shaft end of the brushless motor of the tuyere is equipped with a fan, and the motor control board is fixed at the upper end of the air inlet, and the electronic components on the motor control board are fixed on the heat sink through the circuit board, and the heat dissipation fin is provided below the heat sink.
  • the heat dissipation rib is directly opposite the air inlet, and the distance between the bottom of the heat dissipation rib and the air inlet is 10-20 mm.
  • the base of the brushless motor is provided with a fixing base, and the hood is fastened and sealed to the base to form a whole, and the air outlet is opened on the base.
  • the base is provided with a plurality of fan-shaped air outlets.
  • the diameter of the fan is greater than the outer diameter of the brushless motor.
  • the fan is an axial fan.
  • the utility model has the beneficial effects that the fan and the wind hood simultaneously use the fan and the wind hood to simultaneously dissipate the heat dissipated from the electronic components of the control board, and simultaneously blow out the heat released by the motor during the operation of the motor to cool the motor and the motor control board.
  • the purpose is to improve the performance of the entire system of DC brushless motors.
  • FIG. 1 is a schematic structural view of a heat dissipation structure of a brushless motor according to a preferred embodiment of the present invention
  • FIG. 2 is a schematic structural view of a motor control board in a heat dissipation structure of the brushless motor shown in FIG. 1;
  • FIG. 3 is a schematic structural view of a windshield in a heat dissipation structure of the brushless motor shown in FIG. 1;
  • FIG. 4 is a schematic structural view of a base in a heat dissipation structure of the brushless motor shown in FIG. 1;
  • FIG. 5 is a schematic structural view of a hood and a base in a heat dissipation structure of the brushless motor shown in FIG. 1;
  • FIG. 6 is a schematic structural view of a fan in a heat dissipation structure of the brushless motor shown in FIG. 1;
  • a heat dissipation structure of a brushless motor includes: a motor control board 1 and a brushless motor 2, as shown in FIG.
  • the outer cover of the brushless motor 2 is provided with a windshield 3, as shown in FIG. 3, the windshield 3 is provided with an air outlet 4 and an air inlet 5, and the end of the motor shaft of the brushless motor 2 near the air inlet 5 is equipped with a fan 6, when When the motor rotates, the fan 6 rotates together with the rotor of the brushless motor 2.
  • the motor control board 1 is fixed to the upper end of the air inlet 5.
  • the air inlet 5 and the air outlet 4 form a duct, and when the fan 6 rotates, the heat on the motor control board 1 is sucked through the air inlet 5 and the air outlet 4 of the windshield 3.
  • the electronic component 9 on the motor control board 1 is fixed on the heat sink 7 through a circuit board.
  • a heat dissipation rib 8 is disposed, and the heat dissipation rib 8 is directly opposite to the air inlet 5.
  • the heat sink 7 has a plurality of heat radiating ribs 8, and the heat radiating ribs 8 are opposite to the air inlet 5 of the windshield 3.
  • the fan 6 rotates, the heat is dissipated.
  • the heat on the sheet 7 is sucked away by the hood 3.
  • the distance from the bottom of the heat dissipation rib 8 to the air inlet 5 is 10-20 mm, and the heat dissipation effect is best when the preferred distance of the present invention is 15 mm.
  • the fixing base 10 is disposed under the brushless motor 2, and is also used for air outlet.
  • the windshield 3 is tightly and sealedly connected to the base 10, and the base 10 is provided.
  • the fan 6 is an axial fan 6. It is assembled with the hood 3 to achieve a large directional flow rate of air without causing great noise.
  • the diameter of the fan 6 must be larger than the outer diameter of the entire brushless motor 2 to enclose the entire motor.
  • the heat generated by the motor control board 1 is brought into the hood 3, and the heat generated by the brushless motor 2 is taken out together from the fan-shaped air outlet 4 of the motor base 10, thereby reaching the brushless motor 2 and the motor control board. 1
  • the purpose of cooling is beneficial to improve the performance of the entire heat dissipation system of the brushless DC motor 2.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种无刷电机的散热结构。该无刷电机(2)外罩设有一风罩(3)，其上设有出风口(4)和进风口(5)。靠近进风口的电机轴端部装配有风扇(6)。电机控制板(1)固定在进风口上端，电机控制板上的电子元器件(9)通过线路板固定在散热片(7)上，散热片下方设有散热筋(8)，其正对着进风口并且底部距离进风口的距离为10-20mm。该散热结构利用风扇和风罩同时对电机控制板的电子元器件进行抽风散热，达到给无刷电机和电机控制板降温的目的。

Description

无刷电机的散热结构 技术领域
本发明涉及无刷电机领域，特别是涉及一种割草机用无刷电机的散热结构。
背景技术
市场上传统的无刷电机的散热是不加风扇靠自然风，或风扇只给电机吹风散热。
但无刷电机割草机在负载较大时电机容易发出很大的热量易烧电机，也会使得电机控制板的MOS管发出很大的热量散不出去，易烧MOS管。
发明内容
为解决上述技术问题，本发明主要提供一种减少割草机在负载较大时发生电机或电机控制板烧坏的可能的无刷电机的散热结构。
本发明采用的一个技术方案是：提供一种无刷电机的散热结构，包括：电机控制板和无刷电机，无刷电机外罩设有一风罩，风罩设有出风口和进风口，靠近进风口的无刷电机的电机轴端部装配有风扇，所述电机控制板固定在进风口上端，所述电机控制板上的电子元器件通过线路板固定在散热片上，散热片下方设有散热筋，所述散热筋正对着进风口，散热筋底部距离进风口的距离为10-20mm。
在本发明一个较佳实施例中，无刷电机下方设有固定用底座，所述风罩与底座紧固密封连接成一个整体，出风口开设于底座上。
在本发明一个较佳实施例中，所述底座上设有多个扇形出风口。
在本发明一个较佳实施例中，所述风扇的直径大于无刷电机的外径。
在本发明一个较佳实施例中，所述风扇为轴流风扇。
本发明的有益效果是：本发明利用风扇和风罩同时对控制板的电子元器件散发的热量进行抽风散热，同时把电机工作时散出的热量吹出风罩，从而达到给电机和电机控制板降温的目的，有利于提高直流无刷电机整个系统的性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明无刷电机的散热结构一较佳实施例的结构示意图；
图2是图1所示无刷电机的散热结构中电机控制板的结构示意图；
图3是图1所示无刷电机的散热结构中风罩的结构示意图；
图4是图1所示无刷电机的散热结构中底座的结构示意图；
图5是图1所示无刷电机的散热结构中风罩和底座的结构示意图；
图6是图1所示无刷电机的散热结构中风扇的结构示意图；
附图中各部件的标记如下：1、电机控制板，2、无刷电机，3、风罩，4、出风口，5、进风口，6、风扇，7、散热片，8、散热筋，9、电子元器件，10、底座。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
本发明实施例包括：
一种无刷电机的散热结构，包括：电机控制板1和无刷电机2，如图1所示。
无刷电机2外罩设有一风罩3，如图3所示，风罩3设有出风口4和进风口5，靠近进风口5的无刷电机2的电机轴端部装配有风扇6，当电机转动时，风扇6和无刷电机2的转子一起转动。
所述电机控制板1固定在进风口5上端。进风口5和出风口4形成风道，当风扇6转动时就把电机控制板1上的热量通过风罩3的进风口5和出风口4吸走。
如图2所示，所述电机控制板1上的电子元器件9通过线路板固定在散热片7上，散热片7下方设有散热筋8，所述散热筋8正对着进风口5，当工作时电子元器件9发出的热量，传递到散热片7上，散热片7上有很多散热筋8，散热筋8正对着风罩3的进风口5，当风扇6转动时就把散热片7上的热量通过风罩3吸走。
散热筋8底部距离进风口5的距离为10-20mm，本发明优选的距离为15mm时的散热效果最好。
如图4和图5所示，无刷电机2下方设有固定用底座10，同时也用来出风，所述风罩3与底座10紧固密封连接成一个整体，所述底座10上设有多个扇形出风口4。风从风罩3的进风口5进来后，从底座10的扇型风口出来，从而达到散热的目的。
如图6所示，所述风扇6为轴流风扇6。它和风罩3装配后可实现空气很大的定向流速，同时不会产生很大的噪音，风扇6的直径必须比整个无刷电机2的外径要大，要包住整个电机。
电机控制板1发出的热量被带进风罩3里，和无刷电机2发出的热量又一起从电机底座10的扇型出风口4被带出，从而达到给无刷电机2和电机控制板1降温的目的，有利于提高直流无刷电机2整个散热系统的性能。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等效结构或等效流程变换，或直接或间接运用在其 它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (5)

  1. 一种无刷电机的散热结构，包括：电机控制板和无刷电机，其特征在于，无刷电机外罩设有一风罩，风罩设有出风口和进风口，靠近进风口的无刷电机的电机轴端部装配有风扇，所述电机控制板固定在进风口上端，所述电机控制板上的电子元器件通过线路板固定在散热片上，散热片下方设有散热筋，所述散热筋正对着进风口，散热筋底部距离进风口的距离为10-20mm。
  2. 根据权利要求1所述的无刷电机的散热结构，其特征在于，无刷电机下方设有固定用底座，所述风罩与底座紧固密封连接成一个整体，出风口开设于底座上。
  3. 根据权利要求2所述的无刷电机的散热结构，其特征在于，所述底座上设有多个扇形出风口。
  4. 根据权利要求1所述的无刷电机的散热结构，其特征在于，所述风扇的直径大于无刷电机的外径。
  5. 根据权利要求4所述的无刷电机的散热结构，其特征在于，所述风扇为轴流风扇。
PCT/CN2016/077173 2015-08-18 2016-03-23 无刷电机的散热结构 WO2017028529A1 (zh)

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CN107947464A (zh) * 2017-12-15 2018-04-20 常州格力博有限公司 清洗机
CN109428439A (zh) * 2017-08-30 2019-03-05 天津蓝盟自动控制设备科技有限公司 一种二十四小时工作的电机散热设备
CN114448149A (zh) * 2022-02-07 2022-05-06 河南恒沙智能科技有限公司 水泵用电动机的冷却结构
CN117200502A (zh) * 2023-08-17 2023-12-08 上海智元新创技术有限公司 一种液冷电机

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CN105186787B (zh) * 2015-08-18 2018-09-25 常州格力博有限公司 无刷电机的散热结构
CN108980006A (zh) * 2018-08-16 2018-12-11 东莞瑞柯电子科技股份有限公司 一种带有电机固定圈的充气机

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CN102263471A (zh) * 2010-05-24 2011-11-30 蔡国法 一种车辆无刷驱动电机
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CN109428439A (zh) * 2017-08-30 2019-03-05 天津蓝盟自动控制设备科技有限公司 一种二十四小时工作的电机散热设备
CN107947464A (zh) * 2017-12-15 2018-04-20 常州格力博有限公司 清洗机
CN107947464B (zh) * 2017-12-15 2024-01-02 格力博(江苏)股份有限公司 清洗机
CN114448149A (zh) * 2022-02-07 2022-05-06 河南恒沙智能科技有限公司 水泵用电动机的冷却结构
CN114448149B (zh) * 2022-02-07 2024-01-23 河南恒沙智能科技有限公司 水泵用电动机的冷却结构
CN117200502A (zh) * 2023-08-17 2023-12-08 上海智元新创技术有限公司 一种液冷电机

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