EMI noise suppressor with speed feedback function
By integrating Hall effect circuits and filter circuits into the EMI noise suppressor, the problems of EMI noise suppression and speed feedback integration in the sliding door motor are solved, achieving precise control and stable operation of the motor.
Patent Information
- Application Number
- CN202520388677.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-06
AI Technical Summary
In sliding door motors, existing technologies struggle to achieve EMI noise suppression and complex control effects such as speed feedback and fault diagnosis within limited spaces, resulting in motor size or shape exceeding the requirements of the moving structure.
Design an EMI noise suppressor with speed feedback function. By integrating Hall effect circuit and filter circuit into the EMI noise suppressor, the Hall element is used to detect the change of magnetic field of the motor shaft and the speed feedback signal is input to the motor controller through the signal conditioning circuit, so as to realize the integration of noise suppression and speed feedback.
It integrates EMI noise suppression and speed feedback functions, reducing installation space requirements and improving the accuracy and stability of motor control.
Smart Images
Figure CN223858999U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of side sliding door motor, in particular to an EMI noise suppressor with speed feedback function. BACKGROUND
[0002] In order to ensure the overall appearance of the side sliding door and the convenience of use, the shape and size of the moving structure are required to be high, so that the motor for the moving structure is designed to be constrained by the shape and size, and it is difficult to realize a very complex function.
[0003] At present, in the motor of the side sliding door, the EMI noise suppressor is an essential part, which can reduce the electromagnetic interference of the motor to the outside. In the limited space of the side sliding door motor, a certain space is usually arranged for installing the circuit board of the EMI noise suppressor. However, if more complex control effects such as speed feedback and fault diagnosis are to be realized for the side sliding door motor, a larger space is needed to install the circuit board for realizing these control effects, which will cause the size or shape of the side sliding door motor to exceed the requirements of the moving structure for the side sliding door motor. CONTENT OF THE INVENTION
[0004] The present application provides an EMI noise suppressor with speed feedback function for suppressing the noise of the side sliding door motor, characterized in that the EMI noise suppressor comprises a filter circuit, and the EMI noise suppressor is provided with a docking interface for connecting with a motor controller, and the filter circuit is connected with the motor controller through the docking interface to suppress the noise of the side sliding door motor.
[0005] The EMI noise suppressor is integrated with a Hall circuit, the Hall circuit comprises a Hall element, the Hall element is installed near the brush position of the side sliding door motor, the power supply end of the Hall element is connected with the power supply input pin of the docking interface, and the output end of the Hall element is connected with the feedback signal pin of the docking interface through a signal conditioning circuit to input the speed feedback signal into the motor controller.
[0006] Specifically, the power supply end of the Hall element is connected with the power supply input pin of the docking interface through a current limiting resistor, and the power supply end of the Hall element is grounded through a filter capacitor.
[0007] Specifically, the signal conditioning circuit comprises a conditioning resistor and a conditioning capacitor, the output end of the Hall element is connected with the feedback signal pin through the conditioning resistor, and the output end of the Hall element is grounded through the conditioning capacitor.
[0008] Specifically, the Hall circuit further comprises a pull-up resistor, which is connected with the power supply end and the output end of the Hall element.
[0009] Specifically, the Hall element comprises a first Hall element and a second Hall element, the first power supply end of the first Hall element is connected with the feedback signal first pin of the motor control interface, and the second power supply end of the second Hall element is connected with the feedback signal second pin of the motor control interface.
[0010] Specifically, the signal conditioning circuit comprises a first conditioning resistor, a second conditioning resistor, a first conditioning capacitor and a second conditioning capacitor.
[0011] The first power supply end of the first Hall element is connected with the feedback signal first pin through the first conditioning resistor, and the first power supply end of the first Hall element is grounded through the first conditioning capacitor.
[0012] The second power supply end of the second Hall element is connected with the feedback signal second pin through the second conditioning resistor, and the second power supply end of the second Hall element is grounded through the second conditioning capacitor.
[0013] Specifically, the Hall circuit further comprises a first pull-up resistor and a second pull-up resistor, the first pull-up resistor is connected with the first power supply end and the first output end of the first Hall element, and the second pull-up resistor is connected with the second power supply end and the second output end of the second Hall element.
[0014] Specifically, the filter circuit comprises a mounting plate, the Hall element is welded on the mounting plate, the mounting plate as a whole is in Y shape, and the mounting plate penetrates the rotating shaft of the side sliding door motor.
[0015] Specifically, when the EMI noise suppressor is installed in the side sliding door motor, the filter circuit and the Hall circuit are inside the shell of the side sliding door motor, the docking interface is outside the shell of the side sliding door motor, and the filter circuit is connected with the external motor controller through the docking interface.
[0016] The present application has the following technical effects:
[0017] The EMI noise suppressor structural design and circuit design are provided, so that the function and speed feedback function of the EMI noise suppressor can be integrated on one circuit board, and the installation space is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts.
[0019] Figure 1 This is a structural diagram of an EMI noise suppressor for a sliding door motor according to an embodiment of this application;
[0020] Figure 2 This is a circuit diagram of an EMI noise suppressor for a sliding door motor according to an embodiment of this application;
[0021] Figure 3 This is a schematic diagram showing the positional relationship between the EMI noise suppressor of a side sliding door motor and the shaft of a brushed motor in an embodiment of this application.
[0022] Figure 4 This is a schematic diagram of an EMI noise suppressor for a sliding door motor installed in a brushed motor, according to an embodiment of this application.
[0023] In the diagram, 1 is the PCB board; 2 is the docking interface; 3 is the Hall element; 4 is the motor carbon brush; 5 is the shaft; 6 is the filter inductor; and 7 is the grounding spring. Detailed Implementation
[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.
[0025] like Figure 1 As shown, an EMI noise suppressor for a side-sliding door brushed motor in this embodiment includes a filter circuit and a docking interface 2. The filter circuit is an EMI filter formed by a capacitor, two filter inductors 6, and a grounding spring 7 arranged on a PCB board 1. The grounding spring 7 is connected to the motor housing and plays a role in filtering out high-frequency noise and interference in the power supply of the side-sliding door brushed motor control circuit. This can improve the stability of the subsequent circuit operation and protect the subsequent circuit from the influence of high-frequency noise and interference. Figure 2As shown, the filter circuit has two filter inductors L11, L12 and three capacitors C11, C12, C13, the filter inductors L11, L12 are connected to the brush pins J2-1, J2-2, and a fuse F11 is further connected between the filter inductor L12 and the brush pin J2-2, which trips when the temperature in the circuit exceeds the limit value, and restores when the temperature cools down, protecting the components in the circuit from over-temperature damage, ensuring the safe and stable operation of the circuit. The two ends of the capacitor C11 are respectively connected to the motor pins J1-4, J1-6 of the docking interface 2, the two ends of the capacitor C12 are respectively connected to the motor pin J1-6 and the HSG ground pin J1-7 of the docking interface 2, and the two ends of the capacitor C13 are respectively connected to the motor pin J1-4 and the ground pin J1-7 of the docking interface 2. When the filter circuit is working, when the power is input from the power input pin J1-1, the inductors L11, L12 block the passage of high-frequency noise signals, while allowing low-frequency signals and DC signals to pass through. Since the capacitors C11, C12, C13 have the characteristic of bypassing high-frequency signals, when low-frequency noise and ripples in the power pass through, the capacitors will bypass these noise and ripples to the ground, thereby achieving the effect of filtering.
[0026] The above is the circuit structure of the filter circuit, i.e. the EMI filter, in the present embodiment. The filter circuit is a necessary component of the EMI noise suppressor and is installed near the brush of the brush motor. However, due to the size limitation of the side sliding door for the brush motor, it is not possible to set up additional space inside the brush motor to install a separate speed feedback device. Therefore, the present embodiment modifies the EMI noise suppressor by integrating the Hall circuit through the use of pins in the EMI noise suppressor. As shown in Figure 3 , Figure 4 the Hall element 3 in the Hall circuit is also installed near the motor carbon brush 4 of the brush motor when the EMI noise suppressor is installed. The EMI noise suppressor as a whole is Y-shaped, and the head of the Y-shaped is an open ring. When installing, the shaft 5 of the brush motor is inserted through the opening of the ring, and the Hall element 3 is welded on the PCB board 1 of the filter circuit 2 of the EMI noise suppressor. No additional installation space needs to be provided for the Hall element 3, and it will not affect the size of the brush motor.
[0027] Specifically, Figure 2 the two SC24402SO in Figure 1The power supply end Vdd of the Hall element 3 is connected to the power input pin J1-1 of the docking interface 2, and the output end of the Hall element 3 is connected to the feedback signal pins J1-2 and J1-5 of the docking interface 2 through a signal conditioning circuit. When the Hall circuit is working, the two Hall elements 3 provided in the embodiment obtain power supply through the power input pin J1-1, detect the magnetic field change of the signal magnetic ring on the motor rotating shaft, and input the magnetic field change of the signal magnetic ring as a speed feedback signal to the motor controller through the feedback signal pins J1-2 and J1-5. The motor controller can know the rotating speed of the motor through the magnetic field change of the motor rotor, so as to realize precise control or fault diagnosis of the motor.
[0028] In order to improve the signal quality, the power supply end Vdd of the Hall element 3 is connected to the power input pin J1-1 of the docking interface 2 through a current limiting resistor R21, and the power supply end Vdd of the Hall element 3 is connected to the DGND grounding pin J1-3 of the docking interface 2 through a filtering capacitor C21. When an overcurrent fault occurs, the current limiting resistor R21 can protect the Hall element 3, and the filtering capacitor C21 can provide clean power supply for the Hall element 3. When the power supply is input from the power input pin J1-1, the filtering capacitor C21 filters out the low-frequency noise and ripples in the power supply, and is grounded through the DGND grounding pin J1-3, so as to stabilize the voltage of the Hall element 3.
[0029] Meanwhile, the signal conditioning circuit of the Hall element 3 includes conditioning resistors R23 and R25 and conditioning capacitors C22 and C24. The output end VOUT of the Hall element 3 is connected to the feedback signal pins J1-2 and J1-5 through the conditioning resistors R23 and R25, and the output end VOUT of the Hall element 3 is grounded through the conditioning capacitors C22 and C24. When the EMI noise suppressor of the embodiment is working, the Hall element 3 inputs the magnetic field change of the signal magnetic ring on the motor rotating shaft as a speed feedback signal to the motor controller through the feedback signal pins J1-2 and J1-5. At this time, the Hall element 3 first adjusts the amplitude of the speed feedback signal through the conditioning resistors R23 and R25, so as to prevent excessive current from damaging the subsequent circuit of the motor controller. Meanwhile, the noise in the speed feedback signal is bypassed to ground through the conditioning capacitors C22 and C24, so as to ensure that the subsequent circuit of the motor controller can obtain accurate voltage signals and improve the control accuracy of the motor controller on the motor.
[0030] In the absence of a magnetic field, the two Hall elements in the embodiment pull the output end VOUT to a high level through pull-up resistors R22 and R24, so as to avoid signal interference and false triggering. The two ends of the pull-up resistor R22 are respectively connected to the first power supply end Vdd and the first output end VOUT of the first Hall element, and the two ends of the pull-up resistor R24 are respectively connected to the second power supply end Vdd and the second output end VOUT of the second Hall element.
[0031] In the present embodiment, a series of test points are also provided for the filter circuit and the Hall circuit 3, so as to facilitate the measurement and debugging of the filter circuit and the Hall circuit 3, and to obtain the working state of the filter circuit and the Hall circuit 3 in real time. As shown in Figure 2 The first test point TP11, the second test point TP12 and the third test point TP13 test the input voltage and the output voltage of the filter circuit; the fourth test point TP21, the fifth test point TP22 and the sixth test point TP23 test the power supply voltage and the ground voltage of the Hall circuit 3; and the seventh test point TP24, the eighth test point TP25, the ninth test point TP26 and the tenth test point TP27 test the output signal voltage of the Hall element 3.
[0032] Obviously, the above-described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0033] It should be understood that when the claims, the specification and the drawings of the present application use the terms "first", "second" and the like, they are only used to distinguish different objects, but not to describe a particular order. The terms "include" and "contain" used in the specification and claims of the present application indicate the presence of the described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or sets thereof.
Claims
1. An EMI noise suppressor with a speed feedback function for suppressing noise of a side door motor, characterized by, The EMI noise suppressor comprises a filter circuit, and the EMI noise suppressor is provided with a docking interface for connecting with a motor controller, and the filter circuit is connected with the motor controller through the docking interface to suppress the noise of the side sliding door motor. The EMI noise suppressor is integrated with a Hall circuit, and the Hall circuit comprises a Hall element, the Hall element is installed close to the brush position of the side sliding door motor, the power supply end of the Hall element is connected with the power supply input pin of the docking interface, and the output end of the Hall element is connected with the feedback signal pin of the docking interface through a signal conditioning circuit to input a speed feedback signal into the motor controller.
2. The EMI noise suppressor of claim 1, wherein, The power supply end of the Hall element is connected with the power supply input pin of the docking interface through a current limiting resistor, and the power supply end of the Hall element is grounded through a filter capacitor.
3. The EMI noise suppressor of claim 1, wherein, The signal conditioning circuit comprises a conditioning resistor and a conditioning capacitor, the output end of the Hall element is connected with the feedback signal pin through the conditioning resistor, and the output end of the Hall element is grounded through the conditioning capacitor.
4. The EMI noise suppressor of claim 1, wherein, The Hall circuit further comprises a pull-up resistor, and the pull-up resistor is connected with the power supply end and the output end of the Hall element.
5. The EMI noise suppressor of claim 1, wherein, The Hall element comprises a first Hall element and a second Hall element, the first power supply end of the first Hall element is connected with the feedback signal first pin of the motor control interface, and the second power supply end of the second Hall element is connected with the feedback signal second pin of the motor control interface.
6. The EMI noise suppressor of claim 5, wherein, The signal conditioning circuit comprises a first conditioning resistor, a second conditioning resistor, a first conditioning capacitor and a second conditioning capacitor. The first power supply end of the first Hall element is connected with the feedback signal first pin through the first conditioning resistor, and the first power supply end of the first Hall element is grounded through the first conditioning capacitor. The second power supply end of the second Hall element is connected with the feedback signal second pin through the second conditioning resistor, and the second power supply end of the second Hall element is grounded through the second conditioning capacitor.
7. The EMI noise suppressor of claim 5, wherein, The Hall circuit further comprises a first pull-up resistor and a second pull-up resistor, the first pull-up resistor is connected with the first power supply end and the first output end of the first Hall element, and the second pull-up resistor is connected with the second power supply end and the second output end of the second Hall element.
8. The EMI noise suppressor of claim 1, wherein, The filter circuit comprises a mounting plate, the Hall element is welded on the mounting plate, the mounting plate is in a Y shape as a whole, and the mounting plate penetrates the rotating shaft of the side sliding door motor.
9. The EMI noise suppressor of claim 1, wherein, When the EMI noise suppressor is installed in the side sliding door motor, the filter circuit and the Hall circuit are inside the shell of the side sliding door motor, the docking interface is outside the shell of the side sliding door motor, and the filter circuit is connected with the external motor controller through the docking interface.