Motor wiring terminal temperature measurement circuit
By setting a temperature sensor and a switching transistor on the outer wall of the motor phase line, the problem of high cost and complex structure of existing motor winding temperature measurement is solved, realizing the integration of motor temperature detection and drive, and reducing process complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUZHOU SLIDER ELECTRONIC TECH CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-04-17
AI Technical Summary
Existing methods for measuring the temperature of internal motor windings are costly and complex, requiring additional connection of motor temperature wires.
The temperature measurement circuit consists of a first drive unit, a second drive unit, a temperature sensor, a main control unit, and a switching transistor. The temperature sensor is placed close to the outer wall of the motor phase wire, and the switching transistor drives the motor to operate, thus realizing the integration of temperature detection and motor drive.
It achieves simple motor temperature detection and drive functions, avoiding the need for additional motor temperature wire connections and reducing manufacturing costs.
Smart Images
Figure CN224136743U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of temperature measurement technology for internal windings of motors, and in particular to a temperature measurement circuit for motor terminals. Background Technology
[0002] Existing methods for measuring the temperature of the internal windings of motors generally involve installing a temperature sensor inside the motor to detect the temperature of the windings. However, this method is costly and requires an external motor temperature wire, which is not only structurally complex but also expensive. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a simple motor terminal temperature measuring circuit that can not only detect the temperature of the internal windings of the motor, but also drive the motor to operate.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] A motor terminal temperature measurement circuit includes a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors and three second switching transistors. The motor has three phase wires. The temperature sensor is disposed close to the outer wall of the phase wires of the motor. The main control unit is electrically connected to the first drive unit, the second drive unit and the temperature sensor respectively.
[0006] The sources of the three first switching transistors are electrically connected to the drains of the three second switching transistors in a one-to-one correspondence, and one end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one phase line of the motor.
[0007] Furthermore, the temperature sensor is attached to the outer wall of any one of the three phase lines of the motor.
[0008] Furthermore, the temperature sensor is attached to the outer wall of any two of the three phase lines of the motor.
[0009] Furthermore, the temperature sensor is attached to the outer wall of the three phase lines of the motor.
[0010] Furthermore, an insulating layer is provided between the temperature sensor and the phase wire of the motor.
[0011] Furthermore, the temperature sensor is a surface-mount thermistor.
[0012] Furthermore, the first drive unit, the second drive unit, the temperature sensor, the main control unit, the three first switching transistors, and the three second switching transistors are all integrated on the same circuit board.
[0013] Furthermore, all three phase lines are copper wires.
[0014] Furthermore, the drains of the three first switching transistors are connected in sequence, and one end of the three first switching transistors after being connected in sequence serves as the positive input terminal of the power supply. The drains of the three second switching transistors are connected in sequence, and one end of the three second switching transistors after being connected in sequence serves as the negative input terminal of the power supply.
[0015] Furthermore, the first driving unit includes a first motor driving chip, which is electrically connected to the gates of three first switching transistors respectively.
[0016] The second driving unit includes a second motor driving chip, which is electrically connected to the gates of three second switching transistors.
[0017] The beneficial effects of this utility model are as follows:
[0018] This solution comprises a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors, and three second switching transistors. The motor has three phase lines. The temperature sensor is positioned close to the outer wall of the motor's phase lines. One end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one of the motor's phase lines. The temperature sensor collects the temperature of the three phase lines and transmits the collected temperature to the main control unit. The main control unit outputs a signal to the first and second drive units. The first drive unit transmits the signal to the three first switching transistors, and the second drive unit transmits the signal to the three second switching transistors, thereby driving the motor. The temperature measurement circuit designed in this solution can not only detect the temperature of the motor's internal windings but also drive the motor. It only requires an external temperature sensor to detect the temperature of the three phase lines to calculate the temperature of the motor's internal windings. This not only simplifies the process but also eliminates the need for a separate motor temperature wire. Attached Figure Description
[0019] Figure 1 This is a circuit diagram of the motor terminal temperature measuring circuit of this utility model;
[0020] Label Explanation:
[0021] 1. First drive unit; 2. Second drive unit; 3. Main control unit; 4. Temperature sensor; 5. Phase wire; 6. Motor. Detailed Implementation
[0022] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0023] Please refer to Figure 1 The technical solution adopted by this utility model is as follows:
[0024] A motor terminal temperature measurement circuit includes a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors and three second switching transistors. The motor has three phase wires. The temperature sensor is disposed close to the outer wall of the phase wires of the motor. The main control unit is electrically connected to the first drive unit, the second drive unit and the temperature sensor respectively.
[0025] The sources of the three first switching transistors are electrically connected to the drains of the three second switching transistors in a one-to-one correspondence, and one end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one phase line of the motor.
[0026] As can be seen from the above description, the beneficial effects of this utility model are as follows:
[0027] This solution comprises a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors, and three second switching transistors. The motor has three phase lines. The temperature sensor is positioned close to the outer wall of the motor's phase lines. One end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one of the motor's phase lines. The temperature sensor collects the temperature of the three phase lines and transmits the collected temperature to the main control unit. The main control unit outputs a signal to the first and second drive units. The first drive unit transmits the signal to the three first switching transistors, and the second drive unit transmits the signal to the three second switching transistors, thereby driving the motor. The temperature measurement circuit designed in this solution can not only detect the temperature of the motor's internal windings but also drive the motor. It only requires an external temperature sensor to detect the temperature of the three phase lines to calculate the temperature of the motor's internal windings. This not only simplifies the process but also eliminates the need for a separate motor temperature wire.
[0028] Furthermore, the temperature sensor is attached to the outer wall of any one of the three phase lines of the motor.
[0029] Furthermore, the temperature sensor is attached to the outer wall of any two of the three phase lines of the motor.
[0030] Furthermore, the temperature sensor is attached to the outer wall of the three phase lines of the motor.
[0031] Furthermore, an insulating layer is provided between the temperature sensor and the phase wire of the motor.
[0032] Furthermore, the temperature sensor is a surface-mount thermistor.
[0033] Furthermore, the first drive unit, the second drive unit, the temperature sensor, the main control unit, the three first switching transistors, and the three second switching transistors are all integrated on the same circuit board.
[0034] Furthermore, all three phase lines are copper wires.
[0035] As can be seen from the above description, copper wire has good thermal conductivity and its temperature is close to that of the windings inside the motor, which allows for a more accurate calculation of the temperature of the windings inside the motor.
[0036] Furthermore, the drains of the three first switching transistors are connected in sequence, and one end of the three first switching transistors after being connected in sequence serves as the positive input terminal of the power supply. The drains of the three second switching transistors are connected in sequence, and one end of the three second switching transistors after being connected in sequence serves as the negative input terminal of the power supply.
[0037] Furthermore, the first driving unit includes a first motor driving chip, which is electrically connected to the gates of three first switching transistors respectively.
[0038] The second driving unit includes a second motor driving chip, which is electrically connected to the gates of three second switching transistors.
[0039] Please refer to Figure 1 Embodiment 1 of this utility model is as follows:
[0040] A temperature measurement circuit for the terminals of a motor 6 includes a first drive unit 1, a second drive unit 2, a temperature sensor 4, a main control unit 3, three first switching transistors, and three second switching transistors. The motor 6 has three phase wires 5. The temperature sensor 4 is disposed close to the outer wall of the phase wires of the motor 5 (i.e., the temperature sensor can be close to the outer wall of any one of the three phase wires of the motor, or it can be close to the outer wall of any two of the three phase wires of the motor, or it can be close to the outer wall of all three phase wires of the motor). The main control unit 3 is electrically connected to the first drive unit 1, the second drive unit 2, and the temperature sensor 4.
[0041] The sources of the three first switching transistors are electrically connected to the drains of the three second switching transistors in a one-to-one correspondence, and one end of the connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one phase line 5 of the motor 6.
[0042] The temperature sensor 4 is a surface-mount thermistor.
[0043] An insulating layer is provided between the temperature sensor and the phase wire of the motor.
[0044] All three phase lines 5 are copper wires.
[0045] The temperature sensor 4 can be integrated with the driving circuit (including the first driving unit 1, the second driving unit 2, the main control unit 3, three first switching transistors and three second switching transistors) on the same circuit board or in a sealed space.
[0046] Both the first and second switching transistors are MOSFETs.
[0047] The drains of the three first switching transistors are connected in sequence, and one end of the connection is used as the positive input terminal of the power supply. The drains of the three second switching transistors are connected in sequence, and one end of the connection is used as the negative input terminal of the power supply.
[0048] The first driving unit 1 includes a first motor driving chip, which is electrically connected to the gates of three first switching transistors respectively.
[0049] The second driving unit 2 includes a second motor driving chip, which is electrically connected to the gates of three second switching transistors.
[0050] Both the first motor driver chip and the second motor driver chip are chips that can realize motor driving function in the existing technology.
[0051] The main control unit 3 includes a main control chip, which is a chip that can realize the main controller function in the prior art. The main control chip is electrically connected to the first drive unit 1, the second drive unit 2 and the temperature sensor 4 respectively.
[0052] In summary, the temperature measurement circuit for motor terminals provided by this utility model comprises a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors, and three second switching transistors. The motor has three phase lines. The temperature sensor is positioned close to the outer wall of the motor's phase lines. One end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one phase line of the motor. The temperature sensor collects the temperature of the three phase lines of the motor and transmits the collected temperature to the main control unit. The main control unit outputs a signal to the first and second drive units. The first drive unit transmits the signal to the three first switching transistors, and the second drive unit transmits the signal to the three second switching transistors, thereby driving the motor. This temperature measurement circuit not only detects the temperature of the motor's internal windings but also drives the motor. It only requires an external temperature sensor to detect the temperature of the three phase lines to calculate the temperature of the motor's internal windings. This design is not only simple in process but also eliminates the need for a separate motor temperature wire.
[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A temperature measuring circuit for motor terminals, characterized in that, It includes a first drive unit, a second drive unit, a temperature sensor, a main control unit, three first switching transistors and three second switching transistors. The motor has three phase wires. The temperature sensor is installed close to the outer wall of the phase wires of the motor. The main control unit is electrically connected to the first drive unit, the second drive unit and the temperature sensor respectively. The sources of the three first switching transistors are electrically connected to the drains of the three second switching transistors in a one-to-one correspondence, and one end of the electrical connection between the source of each first switching transistor and the drain of the corresponding second switching transistor is electrically connected to one phase line of the motor.
2. The motor terminal temperature measurement circuit according to claim 1, characterized by The temperature sensor is attached to the outer wall of any one of the three phase lines of the motor.
3. The motor terminal temperature measurement circuit according to claim 1, characterized by The temperature sensor is attached to the outer wall of any two of the three phase lines of the motor.
4. The motor terminal temperature measurement circuit according to claim 1, characterized by, The temperature sensor is attached to the outer wall of the three phase lines of the motor.
5. The motor terminal temperature measurement circuit according to claim 1, characterized by An insulating layer is provided between the temperature sensor and the phase wire of the motor.
6. The motor terminal temperature measurement circuit according to claim 1, characterized by The temperature sensor is a surface-mount thermistor.
7. The motor terminal temperature measurement circuit according to claim 1, characterized by The first drive unit, the second drive unit, the temperature sensor, the main control unit, the three first switching transistors and the three second switching transistors are all integrated on the same circuit board.
8. The motor terminal temperature measurement circuit according to claim 1, characterized by All three phase wires are copper wires.
9. The motor terminal temperature measurement circuit according to claim 1, characterized by The drains of the three first switching transistors are connected in sequence, and one end of the connection is used as the positive input terminal of the power supply. The drains of the three second switching transistors are connected in sequence, and one end of the connection is used as the negative input terminal of the power supply.
10. The motor terminal temperature measurement circuit according to claim 1, characterized by, The first driving unit includes a first motor driving chip, which is electrically connected to the gates of three first switching transistors respectively. The second driving unit includes a second motor driving chip, which is electrically connected to the gates of three second switching transistors.