Heat dissipation structure of motor controller and motor using same

Abstract

The utility model discloses a heat radiation structure of a motor controller and a motor using the same, the heat radiation structure comprises a control box, a circuit board installed in the control box, a plurality of IGBT elements and a plurality of heat radiators used for heat radiation of the IGBT elements, the plurality of IGBT elements are installed and electrically connected on the circuit board, the heat radiators are installed on the inner side wall of the control box, and the heat radiators are electrically connected on the circuit board. The device is characterized in that the radiator is directly made of an insulating heat-conducting material, the plurality of IGBT elements are pressed against the inner side surface of the radiator by using a pressing block and a bolt, and one part of the radiator and the control box are integrally formed by die-casting. The heat dissipation of the IBGT element does not need devices such as a heat dissipation silica gel sleeve and a heat dissipation silica gel pad, so that the manufacturing cost is reduced, the heat-conducting property is good, and the assembly is simple and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat dissipation structure of motor controller and motor applying it. BACKGROUND

[0002] The existing permanent magnet synchronous motor generally designs the motor body and the controller into a mechatronic product, wherein the controller integrates a power supply circuit, a microprocessor, a power inverter circuit, a signal processing module and the like, and the power inverter unit generally adopts an IPM module or a discrete IGBT module. The IPM module has high cost and poor versatility, and the discrete IGBT module is usually used to solve the above problems. When the IBGT module works, heat is generated by the current passing through the chip, and high temperature has adverse effects on the performance of the IGBT module, such as reducing the switching speed and increasing the switching loss. Only timely heat dissipation can control the temperature of the IGBT module within a reasonable range and ensure that the controller works stably according to the design requirements. The controller is a closed structure, and heat is generated by electronic components during work, which needs to be dissipated, especially the IGBT module, otherwise the service life of the electronic components will be shortened, and even the controller or the motor will fail. Due to the limited space of the control box, how to reasonably realize the IGBT layout and insulation heat dissipation is particularly critical, and the most commonly used design of the heat dissipation mode of the IGBT module is to set a radiator in the controller, and the IGBT module is installed on the radiator, and the radiator is tightly attached to the inner wall of the control box. See the utility model patent with publication number CN 202424601U and the name of a direct current brushless motor controller.

[0003] In order to obtain ideal heat dissipation effect, the control box and the radiator are made of metal materials, so that the auxiliary materials for heat dissipation of the IBGT module use heat dissipation silica gel sleeves, heat dissipation silica gel pads and the like to meet the insulation safety requirements, and the use of heat dissipation silica gel sleeves, heat dissipation silica gel pads and the like has the problems of high cost, poor heat conduction, easy damage during assembly process, and complex manual assembly process (six silica gel sleeves are needed for one controller). SUMMARY

[0004] The utility model discloses a heat dissipation structure of motor controller and motor applying it, solve the prior art in the control box and the radiator all adopt metal material manufacturing, therefore IBGT module heat dissipation's auxiliary material will use heat dissipation silica gel sleeve, heat dissipation silica gel pad and the like, meet the insulation safety demand, lead to high cost, poor heat conduction, easy damage during assembly process, and the technical problem of complex manual assembly process.

[0005] The technical scheme of the utility model is as follows:

[0006] The heat dissipation structure of a motor controller comprises a control box, a circuit board installed in the control box, a plurality of IGBT elements and a plurality of heat sinks for dissipating heat of the IGBT elements, the IGBT elements are electrically connected to the circuit board, and the heat sinks are installed on the inner side wall of the control box, characterized in that: the heat sinks are directly made of insulating heat-conductive material, the IGBT elements are pressed against the inner side surface of the heat sinks by means of pressing blocks and bolts, and a part of the heat sinks is integrally pressure-cast with the control box.

[0007] The outer side surface of the heat sink is provided with a plurality of heat dissipation fins, and the heat dissipation fins are pressure-cast into the wall surface of the control box.

[0008] The plurality of heat dissipation fins are distributed in parallel and at intervals.

[0009] The height H of the plurality of heat dissipation fins in the middle is higher, and the height of the plurality of heat dissipation fins on both sides is lower.

[0010] The outer surface of the control box is provided with a plurality of heat dissipation ribs at positions corresponding to the heat sinks, and the ends of the heat dissipation fins are respectively inserted into the heat dissipation ribs.

[0011] The heat sink is a ceramic sheet, the inner side surface is a plane, and the control box is pressure-cast from aluminum or aluminum alloy material.

[0012] A motor comprises a motor body and a motor controller, the motor body comprises a stator, a rotor and a casing, and the motor controller adopts the heat dissipation structure of the motor controller.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The heat sink is directly made of insulating heat-conductive material, the IGBT elements are directly pressed against the inner side surface of the heat sink by means of pressing blocks and bolts, and a part of the heat sink is integrally pressure-cast with the control box. The heat dissipation of the IGBT elements does not need to adopt devices such as heat dissipation silica gel sleeves and heat dissipation silica gel pads, the manufacturing cost is reduced, the heat conduction performance is good, and the assembly is simple and convenient.

[0015] 2. Other advantages of the utility model are described in detail in the embodiment part of the specification. DRAWINGS

[0016] Figure 1 The utility model provides a front view;

[0017] Figure 2 It is the utility model provides an exploded view;

[0018] Figure 3 The utility model provides a front view;

[0019] Figure 4 yes Figure 3 AA section view;

[0020] Figure 5 yes Figure 4 A magnified view of part B;

[0021] Figure 6 A perspective view of the radiator provided by this utility model;

[0022] Figure 7 This is a perspective view of Embodiment 2 of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1:

[0025] like Figures 1 to 6 As shown, this embodiment provides a heat dissipation structure for a motor controller, including a control box 1, a circuit board 2 installed inside the control box 1, several IGBT elements 3, and several heat sinks 4 for heat dissipation of the IGBT elements 3. The several IGBT elements 3 are electrically connected to the circuit board 2, and the heat sinks 4 are installed on the inner side wall 11 of the control box 1. The key feature is that the heat sinks 4 are directly made of insulating and thermally conductive material, and the several IGBT elements 3 are pressed against the inner surface 41 of the heat sink 4 using pressure blocks 5 and bolts 6. A portion of the heat sink 4 is integrally die-cast with the control box 1. Because the heat sink 4 of this invention is directly made of insulating and thermally conductive material, and a portion of the heat sink 4 is integrally die-cast with the control box 1, heat dissipation of the IGBT elements does not require the use of thermal silicone sleeves, thermal silicone pads, or other devices, reducing manufacturing costs, providing good thermal conductivity, and simplifying assembly.

[0026] Several heat dissipation fins 43 protrude from the outer surface 42 of the aforementioned heat sink 4, and these fins 43 are die-cast and embedded into the wall of the control box 1. Adding more heat dissipation fins 43 increases the heat dissipation area and accelerates heat dissipation.

[0027] The aforementioned heat dissipation fins 43 are distributed in parallel intervals. The height H of the heat dissipation fins 43 in the middle is higher, and the height of the fins on both sides is lower. The structure is simple and the layout is reasonable.

[0028] The outer surface of the control box 1 is provided with a plurality of heat dissipation ribs 12 at the position corresponding to the heat sink 4, and the end portions of the plurality of heat dissipation fins 43 are respectively inserted into the plurality of heat dissipation ribs 12, so that the structure layout is beneficial to accelerate heat dissipation.

[0029] The heat sink 4 is a ceramic sheet, the inner side surface 41 is a plane, and the control box 1 is formed by pressure casting of aluminum or an aluminum alloy material, so that the material is convenient to obtain, the structure is simple, and the manufacturing is easy.

[0030] Embodiment two:

[0031] As shown in Figure 7 A motor, comprising a motor body 100 and a motor controller 200, the motor body 100 comprising a stator, a rotor and a casing, characterized in that: the motor controller 200 adopts the heat dissipation structure of the motor controller in embodiment one.

[0032] The heat sink 4 is directly manufactured by using an insulating heat-conducting material, and a part of the heat sink 4 is integrally formed by pressure casting with the control box 1, so that the heat dissipation of the IBGT element does not need to adopt a heat dissipation silica gel sleeve, a heat dissipation silica gel pad and the like, manufacturing cost is reduced, heat conduction performance is good, and assembly is simple and convenient.

[0033] The above embodiment is a preferred embodiment of the utility model, but the embodiment of the utility model is not limited to this, and any change, modification, replacement, combination, simplification, equivalent replacement mode without departing from the spirit and principle of the utility model, all of which are included in the protection scope of the utility model.

Claims

1. A heat dissipation structure of a motor controller, comprising a control box (1), a circuit board (2) installed in the control box (1), a plurality of IGBT elements (3) and a plurality of heat sinks (4) for dissipating heat of the IGBT elements (3), the plurality of IGBT elements (3) being electrically connected to the circuit board (2), and the heat sinks (4) being installed on the inner side wall (11) of the control box (1), characterized in that: The heat sink (4) is directly made of insulating heat conductive material, and the IGBT elements (3) are pressed against the inner side surface (41) of the heat sink (4) by the pressing block (5) and the bolt (6), and a part of the heat sink (4) is integrally pressure cast with the control box (1).

2. The heat dissipation structure of a motor controller according to claim 1, characterized in that: The outer side surface (42) of the heat sink (4) is protruded with a plurality of heat dissipation fins (43), and the plurality of heat dissipation fins (43) are pressure cast into the wall surface of the control box (1).

3. The heat dissipation structure of a motor controller according to claim 2, characterized in that: The plurality of heat dissipation fins (43) are parallel and spaced.

4. The heat dissipation structure of a motor controller according to claim 3, characterized in that: The height H of the plurality of heat dissipation fins (43) in the middle is higher, and the height of the plurality of heat dissipation fins (43) on both sides is lower.

5. A heat dissipation structure of a motor controller according to claim 2 or 3 or 4, characterized in that: A plurality of heat dissipation ribs (12) are arranged on the outer surface of the control box (1) corresponding to the position of the heat sink (4), and the ends of the plurality of heat dissipation fins (43) are respectively inserted into the plurality of heat dissipation ribs (12).

6. The heat dissipation structure of a motor controller according to claim 5, wherein: The heat sink (4) is a ceramic sheet, the inner side surface (41) is a plane, and the control box (1) is pressure cast from aluminum or aluminum alloy material.

7. An electric machine comprising an electric machine body (100) and an electric machine controller (200), the electric machine body (100) comprising a stator, a rotor and a machine housing, characterized in that: The motor controller (200) adopts the heat dissipation structure of the motor controller according to any one of claims 1 to 6. The motor controller (200) adopts the heat dissipation structure of the motor controller according to any one of claims 1 to 6.

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