Electromagnetic drive control circuit and rhythm furniture

Abstract

The utility model provides an electromagnetic driving control circuit which is used for driving an electromagnet driving mechanism to rotate and comprises a control module, two driving modules, two switch modules and two filtering modules. The enabling end and the control end of the driving module are connected with the control module; the switch module is controlled by the driving module, a first input end of the switch module is connected with a first output end of the driving module, and a second input end of the switch module is connected with a second output end of the driving module; the output end of the filtering module is connected with the third input end of the switch module; wherein the switch module comprises at least one group of switch arrays, each group of switch arrays comprises at least two switch tubes which are connected in series between the third input end of the switch module and the ground, and the connection part between the switch tubes is connected with one side or the negative electrode of the coil unit. The phenomenon that the switch tube is overheated can be avoided, meanwhile, circuit power consumption is reduced, the efficiency of the electromagnet driving mechanism is improved, the electromagnet driving mechanism is prevented from being damaged, the maintenance cost is reduced, and therefore the user experience is improved. The utility model further provides rhythm furniture.

Description

Technical Field

[0001] The present application relates to the field of furniture, and in particular to electromagnetic drive control circuits and rhythmic furniture. Background Art

[0002] As living standards continue to improve, people's pursuit of health and comfort is also increasing. Driven by this trend, home furniture such as massage chairs and massage sofas have gradually become popular in modern families. These devices typically feature a massage body and a vibration mechanism to provide a relaxing experience. The massage body, such as a cushion, backrest, or space mat, provides stable and soft support for the user. The vibration mechanism drives the massage body in small, rapid, continuous, and rhythmic reciprocating movements, simulating the touch and force of a human hand, causing corresponding vibration responses in various parts of the body, thus achieving the desired massage effect. This type of massage not only helps relieve fatigue but also provides a certain degree of exercise, making massage chairs and massage sofas more than just a piece of furniture; they are personal healthcare tools that enhance the quality of life.

[0003] Vibration devices are primarily driven by electromagnetic components. In existing technology, these components are controlled by complex H-bridge drive circuits. H-bridge drive circuits are an electronic circuit widely used in various household appliances and industrial equipment. They effectively control the forward and reverse rotation of electromagnetic components. This circuit typically includes four switching devices, typically transistors or MOS semiconductors, connected to form an H-shaped structure. Each device has the ability to turn current on and off. By controlling the on and off states of these devices, the electromagnetic component can be started, reversed, braked, and stopped.

[0004] However, existing H-bridge drive circuits present several practical problems: First, for high-frequency, high-current electromagnet drive coils, the switching devices in the H-bridge circuit are prone to oscillation during on-off, which can cause heating and affect system stability. Second, when the electromagnet drive coils are changing direction, if the junction capacitance of the MOS transistor is released too slowly or shut down inappropriately, it can cause two MOS transistors on the same side to conduct simultaneously, resulting in a short circuit. Such a short circuit not only causes high current to flow but can also cause a short circuit, damaging the device, power supply, or other circuits. Furthermore, improperly shutting down the MOS switch device can result in undesirable on- and off-states, resulting in high on- and off-resistances and increased power loss in the MOS transistor. This can cause heating, reduce the efficiency of the electromagnet drive mechanism, and affect the response speed of the MOS transistor. Long switching delays or reduced speed can lead to inaccurate switching operations and even damage the electromagnet drive mechanism.

[0005] In summary, switching devices are prone to high-frequency oscillation during operation, which not only increases circuit heat generation but can also cause component temperatures to rise, impacting system stability. Furthermore, parasitic capacitance within MOS transistors, due to parasitic effects, poses a potential risk. This capacitance can easily break down under overcurrent conditions. Once this occurs, it can lead to increased heating within the electromagnet drive mechanism, significantly reducing operating efficiency and potentially causing permanent damage. Therefore, improvements to the H-bridge drive circuit are necessary to address these issues. Summary of the Invention

[0006] In order to solve the above problems, the embodiments of the present application provide an electromagnetic drive control circuit and rhythmic furniture, which can solve the problem that the coil of the high-frequency and high-current electromagnet drive mechanism is prone to oscillation when the switching device is working, causing the switching device to heat up, and the electromagnetic drive mechanism is inefficient or even damaged due to the influence of the junction capacitance of the switching device.

[0007] In a first aspect of an embodiment of the present application, an electromagnetic drive control circuit is proposed, which is used to drive the electromagnet drive mechanism to rotate, including: a control module, two drive modules, two switch modules and two filter modules; wherein one drive module, switch module and filter module are arranged on one side of the coil unit, and the other drive module, switch module and filter module are arranged on the other side of the coil unit, the drive module includes: a control end, a first output end and a second output end, the enable end and the control end of the drive module are both connected to the control module; the switch module, which is controlled by the drive module, includes a first input end, a second input end, a third input end and an output end, the first input end of the switch module The first output end of the driving module is connected, and the second input end of the switching module is connected to the second output end of the driving module, wherein the output end of one switching module is connected to one side of the coil unit, and the output end of the other switching module is connected to the other side of the coil unit; the filtering module is used to eliminate the oscillation caused by the switching module, which includes an input end and an output end, the output end of the filtering module is connected to the third input end of the switching module, and the input end of the filtering module is connected to the power supply; wherein the switching module includes at least one group of switch arrays, each group of switch arrays includes at least two switch tubes connected in series between the third input end of the switching module and the ground, and the connection between the switch tubes is connected to the two sides of the coil unit.

[0008] The electromagnetic drive control circuit according to the first aspect of the embodiment of the present application has at least the following beneficial effects: due to the electromagnetic drive control circuit of the embodiment of the present application, the circuit structure composed of a control module, two drive modules, two switch modules and two filter modules can eliminate the problem of oscillation caused by the original switch causing the switching tube to heat up, while also reducing the excessive power loss caused by the parasitic junction capacitance of the original switching tube, improving the efficiency of the electromagnet drive mechanism, and preventing the electromagnet drive mechanism from being damaged.

[0009] In one possible embodiment, the driving module includes a half-bridge driving chip, a seventeenth resistor and a twentieth resistor, the seventeenth resistor is connected between the control port of the half-bridge driving chip and the control end of the driving module, the twentieth resistor is connected between the enable port of the half-bridge driving chip and the enable port of the driving module, the high-side output end of the half-bridge driving chip is connected to the first output end of the driving module, and the low-side output end of the half-bridge driving chip is connected to the second output end of the driving module.

[0010] In a possible implementation manner, the model of the half-bridge driver core is IR2104S.

[0011] In a possible implementation, the switch array includes a fifth MOS transistor, a fifteenth resistor, a third resistor, a tenth MOS transistor, a twenty-third resistor, and a fifth resistor. The gate of the fifth MOS transistor is connected to the fifteenth resistor to the first input end of the switch module, the gate of the tenth MOS transistor is connected to the twenty-third resistor to the second input end of the switch module, the drain of the fifth MOS transistor is connected to the third input end of the switch module, the source of the fifth MOS transistor is connected to the drain of the tenth MOS transistor, the source of the tenth MOS transistor is connected to the seventy-second resistor and grounded, the connection between the fifth MOS transistor and the tenth MOS transistor is connected to the output end of the switch module, the third resistor is connected between the source and gate of the fifth MOS transistor, the fifth resistor is connected between the source and gate of the tenth MOS transistor, and the connection between the fifth MOS transistor and the tenth MOS transistor is connected to one side of the coil unit.

[0012] In a possible implementation, the switch module further includes a first diode and a second diode, the cathode of the first diode is connected to the drain of the fifth MOS tube, the anode of the first diode is connected to the source of the fifth MOS tube, the cathode of the second diode is connected to the drain of the tenth MOS tube, and the anode of the second diode is connected to the source of the tenth MOS tube.

[0013] In a possible implementation, each switch module includes three groups of switch arrays, one side of the coil unit is connected to the three groups of switch arrays, and the other side of the coil unit is connected to the three groups of switch arrays.

[0014] In a possible implementation, each switch module includes six switch arrays, one side of the coil unit is connected to the six switch arrays, and the other side of the coil unit is connected to the six switch arrays.

[0015] In a possible implementation, the filtering module includes a third inductor, a first capacitor, and an eighty-first resistor. The third inductor and the first capacitor are connected in series between the power supply and the ground, and the connection between the third inductor and the first capacitor is connected to the output end of the filtering module.

[0016] In a possible implementation, the inductance of the third inductor is 10 μH, and the capacitance of the first capacitor is 820 μF.

[0017] A second aspect of an embodiment of the present application provides a rhythmic furniture, which includes the electromagnetic drive control circuit as described above.

[0018] The rhythmic furniture according to the second aspect of the embodiment of the present application has at least the following beneficial effects:

[0019] The rhythmic furniture of the second aspect of the embodiment of the present application can eliminate the problem of heating of the switch tube caused by the oscillation caused by the original switch by setting an electromagnetic drive control circuit. At the same time, it also reduces the excessive power loss caused by the parasitic junction capacitance of the original switch tube, improves the efficiency of the electromagnet drive mechanism, and prevents the electromagnet drive mechanism from being damaged, thereby improving the working efficiency of the rhythmic furniture, ensuring that the rhythmic furniture is not easily damaged, reducing maintenance costs, and improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a principle block diagram of an electromagnetic drive control circuit according to an embodiment of the present application.

[0022] Figure 2 This is a circuit diagram of an electromagnetic drive control circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] Examples of the present embodiment are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present embodiment and are not to be construed as limiting the present embodiment.

[0024] In the description of this embodiment, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this embodiment.

[0025] In the description of this embodiment, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0026] In the description of this embodiment, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this embodiment based on the specific content of the technical solution.

[0027] Please refer to Figures 1 to 2 , which shows an electromagnetic drive control circuit, which is used to drive the electromagnet drive mechanism to rotate. The electromagnet drive mechanism includes a coil unit and a magnetic unit. The electromagnetic drive control circuit includes: a control module, two drive modules 1, two switch modules 2 and two filter modules 3; one drive module 1, switch module 2, and filter module 3 are arranged on one side of the coil unit, and the other drive module 1, switch module 2, and filter module 3 are arranged on the other side of the coil unit.

[0028] The driving module 1 includes: a control end, a first output end and a second output end, and the driving module 1 and the control end are both connected to the control module; a switch module 2, which is controlled by the driving module 1, and includes a first input end, a second input end, a third input end and an output end, the first input end of the switch module 2 is connected to the first output end of the driving module 1, and the second input end of the switch module 2 is connected to the second output end of the driving module 1, wherein the output end of one switch module 2 is connected to one side of the coil unit, and the output end of the other switch module 2 is connected to the other side of the coil unit; a filter module 3, which is used to eliminate the oscillation caused by the switch module 2, and includes an input end and an output end, the output end of the filter module 3 is connected to the third input end of the switch module 2, and the input end of the filter module 3 is connected to the power supply; wherein the switch module 2 includes at least one group of switch arrays, each group of switch arrays includes at least two switch tubes connected in series between the third input end of the switch module 2 and the ground, and the connection between the switch tubes is connected to the two sides of the coil unit.

[0029] In this embodiment, the control module includes a single-chip microcomputer (MCU) model STC8A8K64D4. The STC8A8K64D4 series MCU is suitable for applications requiring high speed, low power consumption, and strong anti-interference capabilities, such as industrial control, smart home appliances, and embedded systems. Its rich peripherals and flexible configuration make it widely applicable in various embedded applications.

[0030] The driving module 1 includes a half-bridge driving chip U2, a seventeenth resistor R17 and a twentieth resistor R20. The seventeenth resistor R17 is connected between the control port of the half-bridge driving chip U2 and the control end of the driving module 1, and the twentieth resistor R20 is connected between the enable port of the half-bridge driving chip U2 and the enable port of the driving module 1. The high-side output end of the half-bridge driving chip U2 is connected to the first output end of the driving module 1, and the low-side output end of the half-bridge driving chip U2 is connected to the second output end of the driving module 1.

[0031] In this embodiment, the model of the half-bridge driver chip is IR2104S. IR2104S is a high-performance half-bridge driver chip U2, which is mainly used to drive the switching operation of high-end MOSFETs and is widely used in DC-to-AC converters, inverters, electromagnetic drive mechanism control and other power electronic applications. This chip has excellent performance and reliability and is commonly used in electromagnetic drive mechanism driving applications in the industrial and automotive electronics fields. The IR2104S chip uses a SOIC-8 package, and its power supply voltage range is 10V to 20V, the maximum supply voltage is 20V, and the minimum supply voltage is 10V. It can provide a large gate drive current and has functions such as hardware dead zone and hardware anti-same-arm conduction. In addition, IR2104S also has a bootstrap capacitor function, which can realize high-voltage and low-voltage side driving.

[0032] See also Figure 2 In this embodiment, the specific connection circuit of the driving module 1 located on one side of the coil unit of the electromagnet driving mechanism is as follows: the driving module 1 includes a half-bridge driving chip U2, a seventeenth resistor R17, a twentieth resistor R20, a ninth resistor R9, a seventh capacitor C7, a forty-fourth capacitor C44, a first diode D1 and an eleventh capacitor C11.

[0033] A seventeenth resistor R17 is connected between the control port IN of the half-bridge driver chip U2 and the control end of the driver module 1, a twentieth resistor R20 is connected between the enable port SD of the half-bridge driver chip U2 and the enable port of the driver module 1, the high-side output terminal HO of the half-bridge driver chip U2 is connected to the first output end of the driver module 1, the low-side output terminal LO of the half-bridge driver chip U2 is connected to the second output end of the driver module 1, the chip power supply is connected to the power input terminal VCC of the half-bridge driver chip U2, a seventh capacitor C7 and a forty-fourth capacitor C44 are connected in parallel between the chip power supply and the ground, a ninth resistor R9 and a first diode D1 are connected between the chip power supply and the bootstrap boost circuit input terminal VB of the half-bridge driver chip U2, and an eleventh capacitor C11 is connected between the bootstrap boost circuit input terminal VB of the half-bridge driver chip U2 and the bootstrap boost circuit output terminal VS of the half-bridge driver chip U2. The bootstrap boost circuit input terminal VB of the half-bridge driver chip U2 is used for input of the bootstrap boost circuit to provide sufficient gate voltage, and the output of the bootstrap boost circuit of the half-bridge driver chip U2 is provided to the gate of the MOSFET.

[0034] In this embodiment, the resistance values of the seventeenth resistor R17, the twentieth resistor R20, and the ninth resistor R9 are 100R, 100R, and 4.7R respectively, and the capacitance values of the seventh capacitor C7, the forty-fourth capacitor C44, and the eleventh capacitor C11 are 22μF, 100nF, and 10μF respectively.

[0035] Similarly, the specific connection circuit of the driving module 1 located on the other side of the coil unit of the electromagnet driving mechanism is as follows: the driving module 1 includes a half-bridge driving chip U3, a tenth resistor R10, a twenty-first resistor R21, an eighteenth resistor R18, an eighth capacitor C8, a forty-fifth capacitor C45, a twelfth capacitor C12 and a second diode D2.

[0036] An eighteenth resistor R18 is connected between the control port IN of the half-bridge driver chip U3 and the control end of the driver module 1, a twenty-first resistor R21 is connected between the enable port SD of the half-bridge driver chip U2 and the enable port of the driver module 1, the high-side output terminal HO of the half-bridge driver chip U2 is connected to the first output end of the driver module 1, the low-side output terminal LO of the half-bridge driver chip U2 is connected to the second output end of the driver module 1, the chip power supply is connected to the power input terminal VCC of the half-bridge driver chip U2, an eighth capacitor C8 and a forty-fifth capacitor C45 are connected in parallel between the chip power supply and the ground, a tenth resistor R10 and a second diode D2 are connected between the chip power supply and the bootstrap boost circuit input terminal VB of the half-bridge driver chip U2, and a twelfth capacitor C12 is connected between the bootstrap boost circuit input terminal VB of the half-bridge driver chip U2 and the bootstrap boost circuit output terminal VS of the half-bridge driver chip U2. The bootstrap boost circuit input terminal VB of the half-bridge driver chip U2 is used for input of the bootstrap boost circuit to provide sufficient gate voltage, and the output of the bootstrap boost circuit of the half-bridge driver chip U2 is provided to the gate of the MOSFET.

[0037] In this embodiment, the resistance values of the twenty-first resistor R21, the eighteenth resistor R18, and the tenth resistor R10 are 100R, 100R, and 4.7R, respectively; the capacitance values of the eighth capacitor C8, the forty-fifth capacitor C45, and the twelfth capacitor C12 are 22μF, 100nF, and 10μF, respectively.

[0038] In this embodiment, the switch module 2 includes three groups of switch arrays.

[0039] Furthermore, the switch module 2 can include six or twelve switch arrays, depending on the current in the circuit. According to estimates, since the current flowing through the coil in this embodiment is approximately 30A, three switch arrays, each carrying 10A, can meet the actual circuit requirements.

[0040] The actual circuit structure of one group of switch arrays is as follows: the switch array includes a fifth MOS transistor Q5, a fifteenth resistor R15, a third resistor R3, a tenth MOS transistor Q10, a twenty-third resistor R23, and a fifth resistor R5. The gate of the fifth MOS transistor Q5 is connected to the fifteenth resistor R15 and to the first input terminal of the switch module 2. The gate of the tenth MOS transistor Q10 is connected to the twenty-third resistor R23 and to the second input terminal of the switch module 2. The drain of the fifth MOS transistor Q5 is connected to the third input terminal of the switch module 2. The source of the fifth MOS transistor Q5 is connected to the drain of the tenth MOS transistor Q10. The source of the tenth MOS transistor Q10 is connected to the seventy-second resistor and grounded. The connection between the fifth MOS transistor Q5 and the tenth MOS transistor Q10 is connected to the output terminal of the switch module 2. The third resistor R3 is connected between the source and gate of the fifth MOS transistor Q5. The fifth resistor R5 is connected between the source and gate of the tenth MOS transistor Q10. The connection between the fifth MOS transistor Q5 and the tenth MOS transistor Q10 is connected to the output terminal of the switch module 2, that is, one side of the coil unit.

[0041] In this embodiment, the fifth MOS transistor Q5 and the tenth MOS transistor Q10 are of model 120N85G. The MOS transistor of model 120N85 is a high-performance N-channel power MOSFET with low on-resistance and fast switching characteristics, suitable for various high-frequency switching applications.

[0042] In this embodiment, the resistance values of the fifteenth resistor R15, the third resistor R3, the twenty-third resistor R23, the fifth resistor R5, and the seventy-second resistor are 47R, 10K, 47R, 10K, and 0.2R, respectively.

[0043] from Figure 2 It can be seen that three groups of switch arrays are provided on one side of the coil unit, and three groups of switch arrays are connected to the other side of the coil unit.

[0044] The remaining switch arrays have the same circuit structure as above. It can be seen that the switch array arranged on the other side of the coil unit includes: a fourth MOS transistor, a fifty-sixth resistor, a fourth resistor, a ninth MOS transistor, a twenty-fourth resistor, a sixth resistor, and a seventy-eighth resistor. The gate of the fourth MOS transistor is connected to the fifty-sixth resistor and to the first input terminal of the switch module 2. The gate of the ninth MOS transistor is connected to the twenty-fourth resistor and to the second input terminal of the switch module 2. The drain of the fourth MOS transistor is connected to the third input terminal of the switch module 2. The source of the fourth MOS transistor is connected to the drain of the ninth MOS transistor. The source of the ninth MOS transistor is connected to the seventy-eighth resistor and is grounded. The connection between the fourth and ninth MOS transistors is connected to the output terminal of the switch module 2. The fourth resistor is connected between the source and gate of the fourth MOS transistor. The sixth resistor is connected between the source and gate of the ninth MOS transistor. The connection between the fourth and ninth MOS transistors is connected to the output terminal of the switch module 2, that is, the other side of the coil unit.

[0045] In this embodiment, the fourth MOS transistor and the ninth MOS transistor are of model 120N85G. The MOS transistor of model 120N85 is a high-performance N-channel power MOSFET with low on-resistance and fast switching characteristics, suitable for a variety of high-frequency switching applications.

[0046] In this embodiment, the resistance values of the fifty-sixth resistor, the fourth resistor, the twenty-fourth resistor, the sixth resistor, and the seventy-second resistor are 47R, 10K, 47R, 10K, and 0.2R, respectively.

[0047] The switch module 2 further includes a first diode D1 and a second diode D2. The first diode D1 and the second diode D2 are connected in series between the third input terminal of the switch module 2 and the ground. Taking one group of the switch arrays as an example, the cathode of the first diode D1 is connected to the drain of the fifth MOS transistor Q5, the anode of the first diode D1 is connected to the source of the fifth MOS transistor Q5, the cathode of the second diode D2 is connected to the drain of the tenth MOS transistor Q10, and the anode of the second diode D2 is connected to the source of the tenth MOS transistor Q10.

[0048] The filter module 3 includes a third inductor, a first capacitor and an eighty-first resistor. The third inductor and the first capacitor are connected in series between the power supply and the ground. The connection between the third inductor and the first capacitor is connected to the output end of the filter module 3.

[0049] In this embodiment, the third inductor is connected to a 36V power supply, the inductance of the third inductor is 10 μH, and the capacitance of the first capacitor is 820 μF.

[0050] Similarly, the filter module 3 connected to the other side of the coil unit of the electromagnet drive mechanism has the same circuit structure, specifically: the filter module 3 includes a fourth inductor, a second capacitor and an eighty-second capacitor, the fourth inductor and the second capacitor are connected in series between the power supply and the ground in sequence, and the connection between the fourth inductor and the second capacitor is connected to the output end of the filter module 3.

[0051] In this embodiment, the fourth inductor is connected to a 36V power supply, the inductance of the fourth inductor is 10 μH, and the capacitance of the second capacitor is 820 μF.

[0052] The following combination Figure 1 and Figure 2 The working principle of this application is explained.

[0053] When the control module output controls the electromagnet drive mechanism to rotate clockwise, that is, the half-bridge drive chip U2IN port located on one side of the coil unit of the electromagnet drive mechanism receives a high-level signal, then the half-bridge drive chip U2HO port outputs a high-level signal, and the half-bridge drive chip U2LO port outputs a low-level signal. On the contrary, the half-bridge drive chip U2IN port located on the other side of the coil unit receives a low-level signal, then the half-bridge drive chip U2HO port outputs a low-level signal, and the half-bridge drive chip U2LO port outputs a high-level signal.

[0054] At this time, the fifth MOS transistor Q5, the second MOS transistor Q2, and the fourteenth MOS transistor Q14 in the switch module 2 located on one side of the coil unit are in the on state, while the tenth MOS transistor Q10, the eleventh MOS transistor Q11, and the sixteenth MOS transistor Q16 are in the off state. The fifteenth MOS transistor Q15, the third MOS transistor Q3, and the fourth MOS transistor Q4 in the switch module 2 located on the other side of the coil unit are in the off state, while the seventeenth MOS transistor Q17, the eighth MOS transistor Q8, and the ninth MOS transistor Q9 are in the on state. At this time, the current in the coil unit flows from the side where the fifth MOS transistor Q5, the second MOS transistor Q2, and the fourteenth MOS transistor Q14 are located to the side where the seventeenth MOS transistor Q17, the eighth MOS transistor Q8, and the ninth MOS transistor Q9 are located. When the coil unit is energized, a magnetic force is generated between the magnetic unit and the coil unit due to the change in the magnetic field, and the magnetic unit is driven by the magnetic force to rotate clockwise.

[0055] When all the above MOS tubes are turned off, the coil current continues to flow in the original direction from left to right and gradually becomes zero, performing magnetic reset and the magnetic unit stops working.

[0056] When the control module output controls the electromagnet drive mechanism to rotate counterclockwise, that is, the half-bridge driver chip U2IN port located on the other side of the electric coil unit receives a low-level signal, then the half-bridge driver chip U2HO port outputs a low-level signal, and the half-bridge driver chip U2LO port outputs a high-level signal. On the contrary, when the half-bridge driver chip U2IN port located on the other side of the coil unit receives a high-level signal, the half-bridge driver chip U2HO port outputs a high-level signal, and the half-bridge driver chip U2LO port outputs a low-level signal.

[0057] At this time, the fifth MOS transistor Q5, the second MOS transistor Q2, and the fourteenth MOS transistor Q14 in the switch module 2 located on one side of the coil unit are in the off state, while the tenth MOS transistor Q10, the eleventh MOS transistor Q11, and the sixteenth MOS transistor Q16 are in the on state. The fifteenth MOS transistor Q15, the third MOS transistor Q3, and the fourth MOS transistor Q4 in the switch module 2 located on the other side of the coil unit are in the on state, while the seventeenth MOS transistor Q17, the eighth MOS transistor Q8, and the ninth MOS transistor Q9 are in the off state. At this time, the current in the coil unit flows from the side where the fifteenth MOS transistor Q15, the third MOS transistor Q3, and the fourth MOS transistor Q4 are located to the side where the tenth MOS transistor Q10, the eleventh MOS transistor Q11, and the sixteenth MOS transistor Q16 are located. When the coil unit is energized, a magnetic force is generated between the magnetic unit and the coil unit due to the change in the magnetic field, and the magnetic unit is driven by the magnetic force to rotate counterclockwise.

[0058] When all the above MOS tubes are turned off, the coil current continues to flow from the right to the left in the original direction and gradually becomes zero, performing magnetic reset and the magnetic unit stops working.

[0059] During the operation of the electromagnet drive mechanism, thanks to the three groups of switch arrays equipped by each switch module 2, they play a vital role. This design cleverly divides the complex circuit into multiple independent parts, so that the current can be effectively shunted and managed. This not only enhances the system's ability to handle overcurrent, ensuring stable and efficient operation of the electromagnet drive mechanism, but also helps to reduce the parasitic junction capacitance problem that may be generated by the switching device itself. Through such a layout, the potential risks caused by local overvoltage or imbalance in the circuit can be significantly reduced, while also improving the reliability and stability of the entire electromagnet drive mechanism system. At the same time, the filter module 3 can filter out the problem of oscillation caused by the switch causing the switch tube to heat up.

[0060] The present application also proposes a rhythmic furniture, which includes the electromagnetic drive control circuit as described above.

[0061] The beneficial effects of the present application are: the electromagnetic drive control circuit and rhythmic furniture based on the embodiments of the present application, due to the circuit design of the filter module and the switch module, can avoid the phenomenon of overheating of the switch tube, while reducing the circuit power consumption, improving the efficiency of the electromagnet drive mechanism, preventing the electromagnet drive mechanism from being damaged, reducing maintenance costs, and thus improving user experience.

[0062] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present embodiment. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0063] Although examples of the present embodiment have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and intent of the present embodiment, and the scope of the present embodiment is defined by the claims and their equivalents.

Claims

1. Electromagnetic drive control circuit, characterized in that, It is used to drive the electromagnet drive mechanism to work. The electromagnet drive mechanism includes a coil unit and a magnetic unit. The electromagnetic drive control circuit includes: a control module, two drive modules, two switch modules and two filter modules; one of the drive module, switch module and filter module is arranged on one side of the coil unit, and the other drive module, switch module and filter module are arranged on the other side of the coil unit; The driving module includes: a control end, a first output end and a second output end, and the enabling end and the control end of the driving module are both connected to the control module; The switch module is controlled by the driving module and includes a first input terminal, a second input terminal, a third input terminal, and an output terminal. The first input terminal of the switch module is connected to the first output terminal of the driving module, and the second input terminal of the switch module is connected to the second output terminal of the driving module. The output terminal of one switch module is connected to one side of the coil unit, and the output terminal of the other switch module is connected to the other side of the coil unit. a filter module, which is used to eliminate oscillation caused by the switch module, and comprises an input end and an output end, the output end of the filter module is connected to the third input end of the switch module, and the input end of the filter module is connected to a power supply; The switch module includes at least one switch array, each switch array includes at least two switch tubes connected in series between the third input terminal of the switch module and the ground, and the connection between the switch tubes is connected to both sides of the coil unit.

2. The electromagnetic drive control circuit according to claim 1, characterized in that: The driving module includes a half-bridge driving chip, a seventeenth resistor and a twentieth resistor. The seventeenth resistor is connected between the control port of the half-bridge driving chip and the control end of the driving module, the twentieth resistor is connected between the enable port of the half-bridge driving chip and the enable port of the driving module, the high-side output end of the half-bridge driving chip is connected to the first output end of the driving module, and the low-side output end of the half-bridge driving chip is connected to the second output end of the driving module.

3. The electromagnetic drive control circuit according to claim 2, characterized in that: The model of the half-bridge driver core is IR2104S.

4. The electromagnetic drive control circuit according to claim 1, characterized in that: The switch array includes a fifth MOS transistor, a fifteenth resistor, a third resistor, a tenth MOS transistor, a twenty-third resistor, and a fifth resistor. The gate of the fifth MOS transistor is connected to the fifteenth resistor and the first input terminal of the switch module. The gate of the tenth MOS transistor is connected to the twenty-third resistor and the second input terminal of the switch module. The drain of the fifth MOS transistor is connected to the third input terminal of the switch module. The source of the fifth MOS transistor is connected to the drain of the tenth MOS transistor. The source of the tenth MOS transistor is connected to the seventy-second resistor and grounded. The connection between the fifth and tenth MOS transistors is connected to the output terminal of the switch module. The third resistor is connected between the source and gate of the fifth MOS transistor. The fifth resistor is connected between the source and gate of the tenth MOS transistor. The connection between the fifth and tenth MOS transistors is connected to one side of the coil unit.

5. The electromagnetic drive control circuit according to claim 4, characterized in that: The switch module also includes a first diode and a second diode, the cathode of the first diode is connected to the drain of the fifth MOS tube, the anode of the first diode is connected to the source of the fifth MOS tube, the cathode of the second diode is connected to the drain of the tenth MOS tube, and the anode of the second diode is connected to the source of the tenth MOS tube.

6. The electromagnetic drive control circuit according to claim 4, characterized in that: Each of the switch modules includes three groups of switch arrays. One side of the coil unit is connected to the three groups of switch arrays, and the other side of the coil unit is connected to the three groups of switch arrays.

7. The electromagnetic drive control circuit according to claim 4, characterized in that: Each of the switch modules includes six groups of switch arrays. One side of the coil unit is connected to the six groups of switch arrays, and the other side of the coil unit is connected to the six groups of switch arrays.

8. The electromagnetic drive control circuit according to claim 4, characterized in that: The filtering module includes a third inductor, a first capacitor and an eighty-first resistor. The third inductor and the first capacitor are connected in series between the power supply and the ground in sequence. The connection between the third inductor and the first capacitor is connected to the output end of the filtering module.

9. The electromagnetic drive control circuit according to claim 8, characterized in that: The inductance of the third inductor is 10 μH, and the capacitance of the first capacitor is 820 μF.

10. A rhythmic furniture, characterized in that: It includes the electromagnetic drive control circuit as described in any one of items 1 to 9.

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