Temperature sensing structure of heating component on circuit board and permanent magnet motor

Abstract

The utility model discloses a temperature sensing structure of heating components on a circuit board and a permanent magnet motor, comprising a circuit board, a first heating component, a second heating component and a temperature sensing component, the first heating component is installed on the circuit board through a plurality of first pins at the bottom, and the second heating component is installed on the circuit board through a plurality of second pins at the bottom. The second heating component is installed on the circuit board through a plurality of second pins at the bottom, the first heating component and the second heating component are arranged side by side, a gap is reserved between the first heating component and the second heating component, the temperature sensing component is embedded into the gap, and the top of the first heating component and the top of the second heating component are locked together through a locking device. And the temperature sensing component is attached to the first heating component and the second heating component to detect the temperature. The temperature sensing feedback of the temperature sensing element can be timely and accurate; over-temperature protection can act in time, IGBT components are protected, the temperature sensing element collects the temperature of the two heating components, and the collected temperature is more balanced and accurate.

Description

Technical field:

[0001] The utility model relates to a temperature sensing structure of a heating element on a circuit board and a permanent magnet motor. Background technology:

[0002] Traditional DC motors, such as permanent magnet synchronous motors, have a structure like Figure 1 As shown, it includes a motor and a motor controller, and the main core component of the motor controller is the control circuit board, and its circuit structure is shown in Figure 2 As shown, it includes rectifier current, inverter circuit, microprocessor, etc., among which the inverter circuit multiple IGBT components Q1, Q2, Q3, Q4, Q5 and Q6 are core parts, which generate heat and increase temperature. They are easily destroyed due to excessive temperature rise caused by overcurrent, and are the objects of key protection. Usually, a temperature sensing component 1a is set on the circuit board 10a to detect the operating temperature of the IGBT component. Figure 3 As shown, the temperature sensing component 1a is arranged near the IGBT component 2a and the IGBT component 3a, and the temperature sensing element indirectly transfers temperature through potting glue or other similar media. Since the temperature sensing component 1a is not directly attached to the surface of the IGBT component 2a and the IGBT component 3a, the temperature transmission to the controller over-temperature protection is delayed, and the over-temperature protection cannot be activated in time, resulting in damage to the IGBT components. Summary of the invention:

[0003] The purpose of the utility model is to provide a temperature sensing structure and a permanent magnet motor for a heating component on a circuit board, which can solve the technical problem in the prior art that the temperature sensing component on the circuit board is not directly attached to the surface of the heating electronic component, resulting in a delay in transmitting the temperature to the controller over-temperature protection, and the over-temperature protection cannot be activated in time, resulting in damage to the IGBT components.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A temperature sensing structure for a heating component on a circuit board comprises a circuit board, a first heating component, a second heating component and a temperature sensing component, wherein the first heating component is mounted on the circuit board via a plurality of first pins at the bottom, and the second heating component is mounted on the circuit board via a plurality of second pins at the bottom, and the structure is characterized in that: the first heating component and the second heating component are arranged side by side with a gap in between, the temperature sensing component is embedded in the gap, the tops of the first heating component and the second heating component are locked together via a locking device, so that the temperature sensing component is attached to the first heating component and the second heating component to detect the temperature.

[0006] The locking device is an elastic clip or a screw and nut mechanism.

[0007] The first heat generating component and the second heat generating component are the same type of power heat generating components, and the first heat generating component and the second heat generating component are arranged back to back and side by side.

[0008] The first heat generating component and the second heat generating component mentioned above are both IGBT devices.

[0009] The back side of the above-mentioned IGBT device is a plane, and the temperature sensing component is a flat plate, so that the temperature sensing component can be attached to the back sides of two IGBT devices at the same time.

[0010] A permanent magnet motor comprises a stator assembly, a permanent magnet rotor assembly and a control circuit board, wherein the control circuit board adopts the temperature sensing structure of the heating components on the circuit board.

[0011] Compared with the prior art, the utility model has the following effects:

[0012] 1. It can make the temperature sensing element's temperature feedback timely and accurate; it can make the over-temperature protection act in time to protect the IGBT components.

[0013] 2. The temperature sensing element collects the temperature of two heating components, and the collected temperature is more balanced and accurate.

[0014] 3. Other advantages of the present invention are described in detail in the embodiment section. Description of the drawings:

[0015] Figure 1 It is a structural schematic diagram of a motor in the prior art;

[0016] Figure 2 It is a circuit block diagram of a motor controller in the prior art;

[0017] Figure 3 It is a parts layout diagram of a circuit board of a motor controller in the prior art;

[0018] Figure 4 It is a three-dimensional diagram of the temperature sensing structure of the heating component on the circuit board of the first embodiment of the utility model;

[0019] Figure 5 This is an exploded view of the temperature sensing structure of the heating component on the circuit board of the first embodiment of the utility model;

[0020] Figure 6 This is a front view of the temperature sensing structure of the heat generating component on the circuit board of the first embodiment of the utility model;

[0021] Figure 7 yes Figure 6 AA section view;

[0022] Figure 8This is an exploded view of the temperature sensing structure of the heating component on the circuit board of the second embodiment of the utility model;. Specific implementation method:

[0023] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0024] Embodiment one:

[0025] like Figures 4 to 7 As shown, the temperature sensing structure of a heating component on a circuit board involved in this embodiment includes a circuit board 1, a first heating component 2, a second heating component 3 and a temperature sensing component 4. The first heating component 2 is installed on the circuit board 1 through a plurality of first pins 21 at the bottom, and the second heating component 3 is installed on the circuit board 1 through a plurality of second pins 31 at the bottom. It is characterized in that: the first heating component 2 and the second heating component 3 are arranged side by side with a gap 5 in between, the temperature sensing component 4 is embedded in the gap 5, and the tops of the first heating component 2 and the second heating component 3 are locked together by a locking device, so that the temperature sensing component 4 is attached to the first heating component 2 and the second heating component 3 to detect the temperature.

[0026] The locking device is an elastic clip with a simple structure and easy installation.

[0027] The first heat generating component 2 and the second heat generating component 3 are the same type of power heat generating components. The first heat generating component 2 and the second heat generating component 3 are arranged back to back and side by side, and the layout is reasonable and convenient.

[0028] The first heat generating component 2 and the second heat generating component 3 are both IGBT devices.

[0029] The back side of the above-mentioned IGBT device is a plane, and the temperature sensing component 4 is in the shape of a flat plate, so that the temperature sensing component 4 can be attached to the back sides of two IGBT devices at the same time. The structure is reasonable and the implementation is simple and easy.

[0030] The temperature sensing component 4 mentioned above is a temperature sensor.

[0031] The utility model locks them together through a locking device (i.e., an elastic clip), so that the temperature sensing element 4 is close to the first heating element 2 and the second heating element 3 to detect the temperature. The temperature sensing element can sense the temperature feedback timely and accurately; the temperature sensing element collects the temperature of the two heating elements, and the collected temperature is more balanced and accurate.

[0032] Embodiment 2:

[0033] This embodiment is a modification of the first embodiment, and the modification points are: Figure 8 As shown, the screw-nut mechanism 7 is used to replace the elastic clip of the first embodiment, so that the locking is more firm and stable.

[0034] Embodiment three:

[0035] A permanent magnet motor comprises a stator assembly, a permanent magnet rotor assembly and a control circuit board, wherein the control circuit board adopts the temperature sensing structure of the heating components on the circuit board described in the first or second embodiment.

[0036] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A temperature sensing structure of a heat generating component on a circuit board, comprising a circuit board (1), a first heat generating component (2), a second heat generating component (3) and a temperature sensing component (4), wherein the first heat generating component (2) is mounted on the circuit board (1) via a plurality of first pins (21) at the bottom, and the second heat generating component (3) is mounted on the circuit board (1) via a plurality of second pins (31) at the bottom, and characterized in that: The first heating element (2) and the second heating element (3) are arranged side by side with a gap (5) in between, and the temperature sensing element (4) is embedded in the gap (5). The tops of the first heating element (2) and the second heating element (3) are locked together by a locking device, so that the temperature sensing element (4) is attached to the first heating element (2) and the second heating element (3) to detect the temperature.

2. The temperature sensing structure of a heating component on a circuit board according to claim 1, characterized in that: The locking device is an elastic clip (6) or a screw and nut mechanism (7).

3. The temperature sensing structure of a heating component on a circuit board according to claim 2, characterized in that: The first heating component (2) and the second heating component (3) are power heating components of the same type, and the first heating component (2) and the second heating component (3) are arranged back to back and side by side.

4. The temperature sensing structure of a heating component on a circuit board according to claim 3, characterized in that: The first heat generating component (2) and the second heat generating component (3) are both IGBT devices.

5. The temperature sensing structure of a heating component on a circuit board according to claim 4, characterized in that: The back side of the IGBT device is a plane, and the temperature sensing component (4) is in the shape of a flat plate, so that the temperature sensing component (4) can be attached to the back sides of two IGBT devices at the same time.

6. A permanent magnet motor, comprising a stator assembly, a permanent magnet rotor assembly and a control circuit board, characterized in that: The control circuit board adopts the temperature sensing structure of the heating component on the circuit board described in any one of claims 1 to 5.

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