Motor control circuit and pedestal pan
By combining the control module and impedance module in the motor control circuit, the problem of slow closing of the toilet seat when closing is solved, realizing normal closing and opening operations and avoiding operational interference caused by mechanical friction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN H&T CONTROL TECH CO LTD
- Filing Date
- 2025-03-27
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, toilet seats are slowed down by increasing friction through mechanical friction, which affects the normal closing and opening of the toilet seat.
The toilet seat uses a motor control circuit, which outputs different voltage signals through the control module to control the direction of motor rotation, and uses an impedance module to limit the current when the lid is closed, thus achieving a slow closure of the toilet seat.
It achieves a slow-down mechanism when the toilet seat is closed, while ensuring normal closing and opening operations, avoiding operational interference caused by mechanical friction.
Smart Images
Figure CN224138913U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic circuit technology, and in particular to a motor control circuit and a toilet. Background Technology
[0002] A toilet seat typically consists of a toilet seat and a toilet ring. The toilet seat and toilet ring rotatably fit onto the toilet seat, with the toilet seat positioned above the toilet ring. With the toilet seat, people can comfortably sit and use the toilet, while the toilet seat can be placed over the toilet seat after use to facilitate flushing and prevent odors from spreading.
[0003] When closing a toilet seat, it is usually necessary to allow it to close slowly to avoid damage. Currently, this is typically achieved by increasing friction through mechanical friction; however, this method interferes with the normal control of opening and closing the seat. Utility Model Content
[0004] This application provides a motor control circuit and a toilet that can control the normal opening and closing of the toilet seat while simultaneously enabling the toilet seat to slowly close when closed.
[0005] In a first aspect, embodiments of this application provide a motor control circuit, including: a control module, a first switch module, a second switch module, and an impedance module; a first terminal of the control module is electrically connected to a first terminal of the motor, a first terminal of the first switch module, a first terminal of the second switch module, and a first terminal of the impedance module at a first node; a second terminal of the control module is electrically connected to a second terminal of the motor, a second terminal of the first switch module, and a second terminal of the second switch module at a second node; and a second terminal of the impedance module is electrically connected to a third terminal of the second switch module; the control module is used to output a first voltage signal to the first node or output a second voltage signal to the second node; the first switch module is used to, in response to the first voltage signal, establish a current flow from the first node to... The second node provides a path for the motor to rotate in a first direction, wherein the first direction is either forward or reverse; the first switching module is further configured to, in response to the second voltage signal, establish a current path from the second node to the first node to cause the motor to rotate in a second direction, wherein the second direction is either forward or reverse, and the second direction is different from the first direction; the second switching module is configured to, in response to the motor outputting a back electromotive force to the first node, conduct to establish an electrical connection between the second terminal of the impedance module and the second terminal of the motor, and allow current to flow from the first node through the impedance module and to the second node, wherein the control module does not output the first voltage signal and the second voltage signal when the motor outputs the back electromotive force.
[0006] In one or more embodiments, the first switching module includes a first switching unit and a second switching unit; the control module is further configured to output a control signal when outputting the first voltage signal; the first switching unit is electrically connected to the control module and is configured to turn on in response to the control signal; the second switching unit is electrically connected to the first switching unit and is electrically connected between the first node and the second node, and is configured to turn on when the first switching unit is turned on, so as to establish a path for current to flow from the first node to the second node.
[0007] In one or more embodiments, the first switching unit includes a first resistor, a second resistor, and a first switching transistor; the first resistor and the second resistor are connected in series between the control module and ground, the connection point between the first resistor and the second resistor is electrically connected to the first terminal of the first switching transistor, the second terminal of the first switching transistor is grounded, and the third terminal of the first switching transistor is electrically connected to the second switching unit.
[0008] In one or more embodiments, the second switching unit includes a third resistor and an optocoupler; a first end of the third resistor is electrically connected to the first switching unit, a second end of the third resistor is electrically connected to the cathode of the light emitter of the optocoupler, the anode of the light emitter of the optocoupler is electrically connected to a first voltage, a first end of the light receiver of the optocoupler is electrically connected to the first node, and a second end of the light receiver of the optocoupler is electrically connected to the second node.
[0009] In one or more embodiments, the first switching module includes a unidirectional conductive unit; the unidirectional conductive unit is electrically connected between the first node and the second node, and the unidirectional conductive unit is used to conduct in response to the second voltage signal to establish a path for current to flow from the second node to the first node.
[0010] In one or more embodiments, the unidirectional conductive unit includes a first diode; the anode of the first diode is electrically connected to the second node, and the cathode of the first diode is electrically connected to the first node.
[0011] In one or more embodiments, the second switching module includes a second switching transistor; a first end of the second switching transistor is electrically connected to the first node, a second end of the second switching transistor is electrically connected to the second node, and a third end of the second switching transistor is electrically connected to the impedance module.
[0012] In one or more embodiments, the impedance module includes a second diode and a fourth resistor; the anode of the second diode is electrically connected to the first node, the cathode of the second diode is electrically connected to a first end of the fourth resistor, and the second end of the fourth resistor is electrically connected to a third end of the second switching module.
[0013] In one or more embodiments, the motor control circuit further includes a fifth resistor and a first capacitor; a first end of the fifth resistor is electrically connected to the first node, a second end of the fifth resistor is electrically connected to a first end of the first capacitor, and a second end of the first capacitor is electrically connected to the second node.
[0014] Secondly, embodiments of this application provide a toilet, including a toilet seat, a rotating device, a motor, and a motor drive circuit as described above; the motor is connected to the toilet seat via the rotating device, and the motor is electrically connected to the motor drive circuit; the toilet is configured such that: the motor is controlled by the motor drive circuit to rotate, and drives the toilet seat to rotate via the rotating device, or, when the toilet seat is closed, the rotating device drives the motor to rotate, so that the motor outputs a back electromotive force.
[0015] The beneficial effects of this application are as follows: The motor control circuit of this application embodiment includes a control module, a first switch module, a second switch module, and an impedance module. Specifically, the first terminal of the control module is electrically connected to the first terminal of the motor, the first terminal of the first switch module, the first terminal of the second switch module, and the first terminal of the impedance module at a first node. The second terminal of the control module is electrically connected to the second terminal of the motor, the second terminal of the first switch module, and the second terminal of the second switch module at a second node. The second terminal of the impedance module is electrically connected to the third terminal of the second switch module. When the control module outputs a first voltage signal, the first switch module responds to the first voltage signal by establishing a current path from the first node to the second node, causing the motor to rotate in a first direction. When the control module outputs a second voltage signal, the first switch module responds to the second voltage signal by establishing a current path from the second node to the first node, causing the motor to rotate in a second direction. When this motor control circuit is applied to a toilet, the above process can control the forward or reverse rotation of the motor, thereby enabling the normal opening and closing of the toilet seat. When the control module does not output the first and second voltage signals, the toilet seat, when closed, drives the motor to rotate, causing the motor to output a back electromotive force (EMF). The second switch module responds to the back EMF and conducts, establishing an electrical connection between the second terminal of the impedance module and the second terminal of the motor, allowing current to flow from the first node through the impedance module to the second node. At this time, the presence of the impedance module limits the current, allowing the toilet seat to descend slowly when closed. In summary, this achieves both normal opening and closing of the toilet seat and a slow descent when closed. Attached Figure Description
[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.
[0017] Figure 1 This is a schematic diagram of the composition of the motor control circuit provided in the embodiments of this application. Figure 1 ;
[0018] Figure 2 This is a schematic diagram of the composition of the motor control circuit provided in the embodiments of this application. Figure 2 ;
[0019] Figure 3 This is a schematic diagram of the circuit structure of the motor control circuit provided in the embodiments of this application. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0021] It should be noted that when a component is described as "electrically connected" to another component, it can be directly electrically connected to the other component, or there may be one or more intermediate components in between.
[0022] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0023] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the composition of the motor control circuit provided in an embodiment of this application. Figure 1 As shown, the motor control circuit 100 includes a control module 10, a first switch module 20, a second switch module 30, and an impedance module 40.
[0024] The first end of the control module 10 is electrically connected to the first end of the motor M1, the first end of the first switch module 20, the first end of the second switch module 30, and the first end of the impedance module 40 at the first node N1. The second end of the control module 10 is electrically connected to the second end of the motor M2, the second end of the first switch module 20, and the second end of the second switch module 30 at the second node N2. The second end of the impedance module 40 is electrically connected to the third end of the second switch module 30.
[0025] Specifically, control module 10 is used to output a first voltage signal to first node N1 or output a second voltage signal to second node N2. First switch module 20 is used to establish a current path from first node N1 to second node N2 in response to the first voltage signal, so that motor M1 rotates in a first direction, wherein the first direction is either forward or reverse. First switch module 20 is also used to establish a current path from second node N2 to first node N1 in response to the second voltage signal, so that motor M1 rotates in a second direction, wherein the second direction is either forward or reverse, and the second direction is different from the first direction. Second switch module 30 is used to conduct in response to motor M1 outputting back electromotive force to first node N1, so as to establish an electrical connection between the second terminal of impedance module 40 and the second terminal of motor M1, and to allow current to flow from first node N1 through impedance module 40 and to second node N2. When motor M1 outputs back electromotive force, control module 10 does not output the first voltage signal or the second voltage signal.
[0026] It is understood that motor M1 is a DC motor. If the first terminal of motor M1 is positive and the second terminal is negative, then when the control module 10 outputs a first voltage signal (positive voltage) to the first node N1, motor M1 rotates forward, i.e., the first direction is forward; when the control module 10 outputs a second voltage signal (positive voltage) to the second node N2, motor M1 rotates in reverse, i.e., the second direction is reverse. If the first terminal of motor M1 is negative and the second terminal is positive, then when the control module 10 outputs a first voltage signal to the first node N1, motor M1 rotates in reverse, i.e., the first direction is reverse; when the control module 10 outputs a second voltage signal to the second node N2, motor M1 rotates forward, i.e., the second direction is forward.
[0027] Specifically, when the control module 10 outputs a first voltage signal, the first switch module 10 responds to the first voltage signal by establishing a current path from the first node N1 to the second node N2, causing the motor M1 to rotate in a first direction. When the control module 10 outputs a second voltage signal, the first switch module 10 responds to the second voltage signal by establishing a current path from the second node N2 to the first node N1, causing the motor M1 to rotate in a second direction. When this motor control circuit 100 is applied to a toilet, the above process can control the forward or reverse rotation of the motor M1, thereby enabling the normal opening and closing of the toilet seat.
[0028] When the control module 10 does not output the first voltage signal and the second voltage signal (the branch where the first switch module 20 is located remains open, i.e., no current flows through the first switch module 20), and the toilet seat can drive the motor M1 to rotate when it is closed, the motor M1 outputs a back electromotive force to the first node N1. The second switch module 30 is turned on in response to the back electromotive force to establish an electrical connection between the second terminal of the impedance module 40 and the second terminal of the motor M1, and to allow current to flow from the first node N1 through the impedance module 40 and to the second node N2 (i.e., the current flows sequentially through the first node N1, the impedance module 40, the second switch module 30, and the second node N2). At this time, because the impedance module 40 is present (the impedance module 40 is used to provide a specific impedance value), the current can be limited (even if the current flowing from the first node N1 to the second node N2 is reduced), so that the speed of the motor M1 is reduced, thereby allowing the toilet seat to descend slowly when it is closed.
[0029] In summary, when the motor control circuit 100 is applied to a toilet, it can control the normal closing of the toilet seat (referring to the situation where the motor M1 rotates to drive the toilet seat to close) and opening, as well as the slow closing of the toilet seat when it is closed (referring to the situation where the toilet seat closes automatically due to inertia).
[0030] In some embodiments, such as Figure 2 As shown, the first switch module 20 includes a first switch unit 21 and a second switch unit 22. The first switch unit 21 is electrically connected to the control module 10, and the second switch unit 22 is electrically connected to the first switch unit 21, and is electrically connected between the first node N1 and the second node N2. Specifically, the first end of the first switch unit 21 is electrically connected to the third end of the control module 10, the second end of the first switch unit 21 is electrically connected to the first end of the second switch unit 22, the second end of the second switch unit 22 is electrically connected to the first node N1, and the third end of the second switch unit 22 is electrically connected to the second node N2.
[0031] Specifically, the control module 10 is also used to output a control signal when outputting the first voltage signal. The first switching unit 21 is used to turn on in response to the control signal. The second switching unit 22 is used to turn on when the first switching unit 21 is turned on, so as to establish a path for current to flow from the first node N1 to the second node N2.
[0032] In some embodiments, the first switching module 20 includes a unidirectional conductive unit 23. The unidirectional conductive unit 23 is electrically connected between the first node N1 and the second node N2.
[0033] Specifically, the unidirectional conductive unit 23 is turned on in response to the second voltage signal to establish a path for current to flow from the second node N2 to the first node N1. That is, the unidirectional conductive unit 23 will only be turned on when the second node N2 is the second voltage signal, allowing current to flow from the second node N2 to the first node N1; while when the first node N1 is the first voltage signal, the unidirectional conductive unit 23 will be turned off.
[0034] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of the motor control circuit 100 provided in an embodiment of this application. Figure 3 As shown, the first switching unit 21 includes a first resistor R1, a second resistor R2, and a first switching transistor Q1.
[0035] The first resistor R1 and the second resistor R2 are connected in series between the control module 10 and ground GND. The connection point N3 between the first resistor R1 and the second resistor R2 is electrically connected to the first terminal of the first switch Q1. The second terminal of the first switch Q1 is grounded to GND. The third terminal of the first switch Q1 is electrically connected to the second switch unit 22.
[0036] Specifically, the first resistor R1 and the second resistor R2 divide the voltage of the control signal output by the control module 10, and the voltage division of the control signal across the second resistor R2 drives the first switch Q1 to turn on. The second resistor R2 also serves to discharge electrical energy when the first switch Q1 is turned off, ensuring that the first switch Q1 is reliably turned off.
[0037] In this embodiment, the first switching transistor Q1 is an NPN transistor. The base of the NPN transistor is the first terminal of the first switching transistor Q1, the emitter of the NPN transistor is the second terminal of the first switching transistor Q1, and the collector of the NPN transistor is the third terminal of the first switching transistor Q1.
[0038] In addition, the first switch Q1 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.
[0039] In some embodiments, the second switching unit 22 includes a third resistor R3 and an optocoupler U1.
[0040] The first end of the third resistor R3 is electrically connected to the first switching unit 21, the second end of the third resistor R3 is electrically connected to the cathode of the light emitter of the optocoupler U1, the anode of the light emitter of the optocoupler U1 is electrically connected to the first voltage V1, the first end of the light receiver of the optocoupler U1 is electrically connected to the first node N1, and the second end of the light receiver of the optocoupler U1 is electrically connected to the second node N2.
[0041] Specifically, the third resistor R3 is used for current limiting.
[0042] In some embodiments, the unidirectional conductive unit 23 includes a first diode D1.
[0043] The anode of the first diode D1 is electrically connected to the second node N2, and the cathode of the first diode D1 is electrically connected to the first node N1.
[0044] In some embodiments, the second switching module 30 includes a second switching transistor Q2.
[0045] The first terminal of the second switch Q2 is electrically connected to the first node N1, the second terminal of the second switch Q2 is electrically connected to the second node N2, and the third terminal of the second switch Q2 is electrically connected to the impedance module 40.
[0046] In this embodiment, the second switch Q2 is an NMOS transistor. The gate of the NMOS transistor is the first terminal of the second switch Q2, the source of the NMOS transistor is the second terminal of the second switch Q2, and the drain of the NMOS transistor is the third terminal of the second switch Q2.
[0047] In addition, the second switch Q2 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.
[0048] In some embodiments, the impedance module 40 includes a second diode D2 and a fourth resistor R4.
[0049] The anode of the second diode D2 is electrically connected to the first node N1, the cathode of the second diode D2 is electrically connected to the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is electrically connected to the third end of the second switch module 30.
[0050] In some embodiments, the motor control circuit 100 further includes a fifth resistor R5 and a first capacitor C1.
[0051] Among them, the first end of the fifth resistor R5 is electrically connected to the first node N1, the second end of the fifth resistor R5 is electrically connected to the first end of the first capacitor C1, and the second end of the first capacitor C1 is electrically connected to the second node N2.
[0052] Specifically, the fifth resistor R5 is used for current limiting, and the first capacitor C1 is used for filtering.
[0053] The following are Figure 3 The principle of the circuit structure shown will be explained.
[0054] When the control module 10 outputs the first voltage signal and the control signal simultaneously, on the one hand, the control signal input drives the first switch Q1 to conduct after being divided by the first resistor R1 and the second resistor R2. The light emitter of the optocoupler U1 is grounded to GND through the third resistor R3 and the first switch Q1, so the light emitter of the optocoupler U1 is energized and the light receiver of the optocoupler U1 is turned on. On the other hand, the first voltage signal is input to the first node N1, and the current flows from the first node N1, the fifth resistor R5, and the light receiver of the optocoupler U1 into the second node N2. That is, the first node N1, the fifth resistor R5, the optocoupler U1, the second node N2 and the motor M1 form a circuit, and the motor M1 rotates in the first direction.
[0055] When the control module 10 outputs the second voltage signal, on the one hand, since the control module 10 does not output a control signal, the first switch Q1 is in the off state, the light emitter of the optocoupler U1 is de-energized, and the light receiver of the optocoupler U1 is disconnected; on the other hand, the second voltage signal is input to the second node N2, the first diode D1 is forward-biased, and the current flows from the second node N2, the first diode D1, and the fifth resistor R5 into the first node N1, that is, the second node N2, the first diode D1, the fifth resistor R5, the first node N1 and the motor M1 form a circuit, and the motor M1 rotates in the second direction.
[0056] When the control module 10 does not output the first voltage signal and the second voltage signal, and the toilet seat drives the motor M1 to rotate when it is closed, the motor M1 outputs a back electromotive force to the first node N1. The second switch Q2 turns on in response to the back electromotive force, and the current flows from the first node N1, the second diode D2, the fourth resistor R4, the second switch Q2 to the second node N2, that is, the first node N1, the second diode D2, the fourth resistor R4, the second switch Q2, the second node N2 and the motor M1 form a circuit. At this time, due to the presence of the fourth resistor R4, the current can be limited (even if the current flowing from the first node N1 to the second node N2 is reduced), so that the rotation speed of the motor M1 is reduced, thereby allowing the toilet seat to descend slowly when it is closed.
[0057] In summary, when the motor control circuit 100 is applied to a toilet, it can control the normal opening and closing of the toilet seat, as well as the slow closing of the toilet seat when it is closed.
[0058] This application also provides a toilet, which includes a toilet seat, a rotating device, a motor M1, and a motor drive circuit 100 as described in any embodiment of this application.
[0059] The motor M1 is connected to the toilet seat via a rotating device, and the motor M1 is electrically connected to the motor drive circuit 100. The specific implementation of the connection between the motor M1 and the toilet seat via the rotating device is a conventional technical means for those skilled in the art, and will not be elaborated here. For example, in some embodiments, the rotating device consists of gears, chains, or belts to convert the rotational motion of the motor M1 into the opening and closing action of the toilet seat.
[0060] Specifically, the toilet is configured such that: the motor M1 is controlled by the motor drive circuit 100 to rotate, and drives the toilet seat to rotate through the rotating device; or, when the toilet seat is closed (referring to the case where the toilet seat closes automatically due to inertia), the rotating device drives the motor M1 to rotate, so that the motor M1 outputs back electromotive force.
[0061] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
[0062] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A motor control circuit, characterized by, include: Control module, first switch module, second switch module and impedance module; The first end of the control module is electrically connected to the first end of the motor, the first end of the first switch module, the first end of the second switch module, and the first end of the impedance module at a first node. The second end of the control module is electrically connected to the second end of the motor, the second end of the first switch module, and the second end of the second switch module at a second node. The second end of the impedance module is electrically connected to the third end of the second switch module. The control module is used to output a first voltage signal to the first node or output a second voltage signal to the second node; The first switching module is used to establish a current path from the first node to the second node in response to the first voltage signal, so that the motor rotates in a first direction, wherein the first direction is either forward or reverse. The first switching module is also configured to, in response to the second voltage signal, establish a current path from the second node to the first node, so that the motor rotates in a second direction, wherein the second direction is either forward or reverse, and the second direction is different from the first direction; The second switching module is turned on in response to the motor outputting back electromotive force to the first node, so as to establish an electrical connection between the second terminal of the impedance module and the second terminal of the motor, and to allow current to flow from the first node through the impedance module and to the second node, wherein the control module does not output the first voltage signal and the second voltage signal when the motor outputs the back electromotive force.
2. The motor control circuit of claim 1, wherein, The first switch module includes a first switch unit and a second switch unit; The control module is also used to output a control signal when the first voltage signal is output; The first switching unit is electrically connected to the control module, and the first switching unit is used to turn on in response to the control signal; The second switching unit is electrically connected to the first switching unit and is electrically connected between the first node and the second node. The second switching unit is used to turn on when the first switching unit is turned on, so as to establish a path for current to flow from the first node to the second node.
3. The motor control circuit of claim 2, wherein, The first switching unit includes a first resistor, a second resistor, and a first switching transistor; The first resistor and the second resistor are connected in series between the control module and ground. The connection point between the first resistor and the second resistor is electrically connected to the first terminal of the first switching transistor. The second terminal of the first switching transistor is grounded, and the third terminal of the first switching transistor is electrically connected to the second switching unit.
4. The motor control circuit of claim 2, wherein, The second switching unit includes a third resistor and an optocoupler; The first end of the third resistor is electrically connected to the first switching unit, the second end of the third resistor is electrically connected to the cathode of the light emitter of the optocoupler, the anode of the light emitter of the optocoupler is electrically connected to the first voltage, the first end of the light receiver of the optocoupler is electrically connected to the first node, and the second end of the light receiver of the optocoupler is electrically connected to the second node.
5. The motor control circuit of claim 1, wherein, The first switch module includes a unidirectional conductive unit; The unidirectional conductive unit is electrically connected between the first node and the second node. The unidirectional conductive unit is used to conduct in response to the second voltage signal to establish a path for current to flow from the second node to the first node.
6. The motor control circuit of claim 5, wherein, The unidirectional conductive unit includes a first diode; The anode of the first diode is electrically connected to the second node, and the cathode of the first diode is electrically connected to the first node.
7. The motor control circuit of claim 1, wherein, The second switching module includes a second switching transistor; The first end of the second switch is electrically connected to the first node, the second end of the second switch is electrically connected to the second node, and the third end of the second switch is electrically connected to the impedance module.
8. The motor control circuit according to claim 1, characterized in that, The impedance module includes a second diode and a fourth resistor; The anode of the second diode is electrically connected to the first node, the cathode of the second diode is electrically connected to the first end of the fourth resistor, and the second end of the fourth resistor is electrically connected to the third end of the second switching module.
9. The motor control circuit of claim 1, wherein, The motor control circuit also includes a fifth resistor and a first capacitor; The first end of the fifth resistor is electrically connected to the first node, the second end of the fifth resistor is electrically connected to the first end of the first capacitor, and the second end of the first capacitor is electrically connected to the second node.
10. A toilet bowl characterized by comprising: Includes a toilet seat, a rotating device, a motor, and a motor drive circuit as described in any one of claims 1-9; The motor is connected to the toilet seat via the rotating device, and the motor is electrically connected to the motor drive circuit; The toilet is configured such that: the motor is controlled by the motor drive circuit to rotate, and drives the toilet seat to rotate through the rotating device; or, when the toilet seat is closed, the rotating device drives the motor to rotate, so that the motor outputs back electromotive force.