Damping adjusting circuit and electronic equipment

Abstract

The invention discloses a damping adjusting circuit and electronic equipment, and is applied to the field of integrated circuits. In the circuit, a first input end of a controller is connected with a brush direct-current gear motor through a current detection circuit and is used for acquiring current parameters of the brush direct-current gear motor; the second input end is connected with the brush direct-current gear motor through a coding circuit and is used for acquiring operation parameters of the brush direct-current gear motor; the first output end is connected with the brush direct-current gear motor through the full-bridge circuit and the current detection circuit and is used for controlling the rotation of the brush direct-current gear motor; the second output end is connected with the brush direct current gear motor through the damping control circuit and used for adjusting damping parameters in the damping control circuit according to the current parameters and the operation parameters. Compared with a brushless direct current motor, the brush direct current gear motor is selected, the cost is low, the control strategy is simple, damping can be adjusted more accurately through the damping control circuit, and fine torque control and motion smoothness optimization are achieved.

Description

Technical Field

[0001] This application relates to the field of integrated circuits, and in particular to a damping adjustment circuit and electronic device. Background Technology

[0002] Current equipment generally uses brushless DC motors, such as Figure 1 As shown, a drive circuit is built using six MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), and embedded software is used to achieve six-step commutation or FOC (Field Oriented Control) vector control. Figure 1 SW1-SW6 are 6 MOSFETs, PWM1-PWM6 are the corresponding drive signals, M is a brushless DC motor, and V, U and W represent three-phase voltages.

[0003] The main limitations of this architecture are threefold: First, the control strategy is complex, requiring precise timing control and parameter tuning for both the six-step commutation and the FOC algorithm, which places stringent demands on the technical capabilities of the development team. Second, the hardware cost is high, with not only the motor itself being expensive but also requiring multiple MOSFETs and driver chips. Third, damping characteristics are difficult to tune, with limited damping adjustment capabilities in active motion mode, making it difficult to achieve precise torque control and motion smoothness optimization. In passive motion (such as gliding or being dragged by external forces), there is a lack of effective energy management and damping matching mechanisms, leaving room for improvement in both user experience and energy efficiency.

[0004] In view of the above-mentioned technologies, it is an urgent problem for those skilled in the art to find a circuit that is simple to control, low in cost, and capable of adjusting damping in both active and passive operation modes. Summary of the Invention

[0005] The purpose of this application is to provide a damping adjustment circuit and electronic device. This can solve the problems of complex control strategies, high hardware costs, and difficulties in adjusting damping characteristics in existing technologies.

[0006] To solve the above-mentioned technical problems, this application provides a damping adjustment circuit, including: a controller, a brushed DC geared motor, a full-bridge circuit, a current detection circuit, an encoding circuit, and a damping control circuit; The first input terminal of the controller is connected to the first terminal of the brushed DC geared motor through a current detection circuit, which is used to obtain the current parameters of the brushed DC geared motor collected by the current detection circuit. The second input terminal of the controller is connected to the second terminal of the brushed DC geared motor through an encoding circuit, and is used to acquire the operating parameters of the brushed DC geared motor collected by the encoding circuit. The first output terminal of the controller is connected to the first terminal of the brushed DC geared motor through a full-bridge circuit and a current detection circuit, and is used to control the rotation of the brushed DC geared motor. The second output terminal of the controller is connected to the third terminal of the brushed DC geared motor through a damping control circuit, which is used to adjust the damping parameters in the damping control circuit according to the current parameters and operating parameters.

[0007] Preferably, the full-bridge circuit includes: an upper bridge arm circuit, a lower bridge arm circuit, and a protection circuit; The input terminals of the upper bridge arm circuit and the lower bridge arm circuit together form the input terminal of the full bridge circuit, which is connected to the first output terminal of the controller. The power supply terminal of the upper bridge arm circuit is connected to the power supply terminal of the lower bridge arm circuit, and both are connected to the first voltage source. The connection terminal of the upper bridge arm circuit is connected to the connection terminal of the lower bridge arm circuit and the connection terminal of the protection circuit. The output terminal of the upper bridge arm circuit is connected to the input terminal of the current detection circuit as the output terminal of the full bridge circuit.

[0008] Preferably, the upper bridge arm circuit includes: a first MOSFET, a second MOSFET, a first turn-off circuit, a second turn-off circuit, and a first filter circuit; In this circuit, the first terminal of the first shutdown circuit and the first terminal of the second shutdown circuit are connected together as the input terminal of the upper bridge arm circuit, the input terminal of the lower bridge arm circuit, and the first output terminal of the controller. The second terminal of the first shutdown circuit is connected to the gate of the first MOS transistor, and the third terminal of the first shutdown circuit is connected to the drain of the first MOS transistor, the source of the second MOS transistor, and the first terminal of the first filter circuit. The second terminal of the second turn-off circuit is connected to the gate of the second MOS transistor, and the third terminal of the second turn-off circuit is grounded. The source of the first MOSFET is connected to the power supply terminal of the upper bridge arm circuit, the power supply terminal of the lower bridge arm circuit, and the first voltage source. The second terminal of the first filter circuit is connected to the input terminal of the current detection circuit as the output terminal of the upper bridge arm circuit. The drain of the second MOSFET is connected to the upper bridge arm circuit, the lower bridge arm circuit, and the protection circuit.

[0009] Preferably, the lower bridge arm circuit includes: a third MOSFET, a fourth MOSFET, a third turn-off circuit, a fourth turn-off circuit, a second filter circuit, and a bidirectional trigger diode; Among them, the first terminal of the third shutdown circuit and the first terminal of the fourth shutdown circuit are connected together as the input terminal of the lower bridge arm circuit, the input terminal of the upper bridge arm circuit, and the first output terminal of the controller. The second terminal of the third shutdown circuit is connected to the gate of the third MOS transistor, and the third terminal of the third shutdown circuit is connected to the drain of the third MOS transistor, the source of the fourth MOS transistor, and the first terminal of the second filter circuit. The second terminal of the fourth turn-off circuit is connected to the gate of the fourth MOS transistor, and the third terminal of the fourth turn-off circuit is grounded. The source of the third MOSFET is connected to the power supply terminal of the lower bridge arm circuit, the power supply terminal of the upper bridge arm circuit, and the first voltage source. The drain of the fourth MOSFET is connected to the lower bridge arm circuit, the upper bridge arm circuit, and the protection circuit, and is connected to the source of the third MOSFET through a bidirectional trigger diode.

[0010] Preferably, the current detection circuit includes: a current detection chip, an operational amplifier, a first resistor, a second resistor, a third resistor, a first capacitor, and a second capacitor; The input pin of the current detection chip is connected to the output of the full-bridge circuit as the input terminal of the current detection circuit. The power supply pin of the current detection chip is connected to the first terminal of the first capacitor and the first voltage source; The output pin of the current detection chip is connected to the inverting input terminal of the operational amplifier, the first terminal of the second resistor, and the first terminal of the second capacitor through a first resistor. The zero-crossing detection pin of the current detection chip is connected to the non-inverting input of the operational amplifier through a third resistor; The output terminal of the operational amplifier is connected to the second terminal of the second resistor and the second terminal of the second capacitor, and together they serve as the output terminal of the current detection circuit, which is connected to the first input terminal of the controller.

[0011] Preferably, the encoding circuit includes: an encoder, a connector, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor; The encoder is coupled to the brushed DC geared motor and the controller, and the encoder plug is connected to the connector socket. The first end of the connector is connected to the first end of the fourth resistor, the first end of the fifth resistor, the first end of the sixth resistor, the first end of the third capacitor, and the first end of the fourth capacitor, and together they are connected to the second voltage source. The second end of the connector is connected to the second end of the fourth resistor and the first end of the fifth capacitor; The third terminal of the connector is connected to the second terminal of the fifth resistor and the first terminal of the sixth capacitor; The fourth terminal of the connector is connected to the second terminal of the sixth resistor and the first terminal of the seventh capacitor. The fifth terminal of the connector, the second terminal of the third capacitor, the second terminal of the fourth capacitor, the second terminal of the fifth capacitor, the second terminal of the sixth capacitor, and the second terminal of the seventh capacitor are all grounded.

[0012] Preferably, the damping control circuit includes: an active adjustment circuit and a passive adjustment circuit; The input terminals of the active adjustment circuit and the passive adjustment circuit are combined and connected to the second output terminal of the controller as the input terminal of the damping control circuit. The output of the active adjustment circuit is connected to the positive terminal of the brushed DC geared motor; The output terminal of the passive adjustment circuit is connected to the negative terminal of the brushed DC geared motor; wherein, the positive terminal and the negative terminal of the brushed DC geared motor constitute the third terminal of the brushed DC geared motor.

[0013] Preferably, the active adjustment circuit includes: a first damping resistor, an eighth capacitor, a fifth MOSFET, and a fifth turn-off circuit; Among them, the first end of the first damping resistor is connected to the first end of the eighth capacitor, and together they serve as the output terminal of the active adjustment circuit and are connected to the positive terminal of the brushed DC geared motor. The second terminal of the first damping resistor is connected to the second terminal of the eighth capacitor and the source of the fifth MOSFET. The input terminal of the fifth shutdown circuit is connected to the second output terminal of the controller as the input terminal of the active adjustment circuit. The output of the fifth shutdown circuit is connected to the gate of the fifth MOS transistor; The drain of the fifth MOSFET is grounded.

[0014] Preferably, the passive adjustment circuit includes: a second damping resistor, a ninth capacitor, a sixth MOSFET, and a sixth turn-off circuit; Among them, the first end of the second damping resistor is connected to the first end of the ninth capacitor, and together they serve as the output end of the passive adjustment circuit and are connected to the negative terminal of the brushed DC geared motor. The second terminal of the second damping resistor is connected to the second terminal of the ninth capacitor and the source of the sixth MOSFET. The input terminal of the sixth shutdown circuit is connected to the second output terminal of the controller as the input terminal of the passive adjustment circuit. The output of the sixth shutdown circuit is connected to the gate of the sixth MOS transistor; The drain of the sixth MOSFET is grounded.

[0015] On the other hand, this application also provides an electronic device including the aforementioned damping adjustment circuit.

[0016] The damping adjustment circuit provided in this application includes a controller, a brushed DC geared motor, a full-bridge circuit, a current detection circuit, an encoding circuit, and a damping control circuit. The first input terminal of the controller is connected to the first terminal of the brushed DC geared motor via the current detection circuit to acquire the current parameters of the brushed DC geared motor collected by the current detection circuit. The second input terminal of the controller is connected to the second terminal of the brushed DC geared motor via the encoding circuit to acquire the operating parameters of the brushed DC geared motor collected by the encoding circuit. The first output terminal of the controller is connected to the first terminal of the brushed DC geared motor via the full-bridge circuit and the current detection circuit to control the rotation of the brushed DC geared motor. The second output terminal of the controller is connected to the third terminal of the brushed DC geared motor via the damping control circuit to adjust the damping parameters in the damping control circuit according to the current parameters and operating parameters. Therefore, it can be seen that this application selects a brushed DC geared motor for the motor selection. Compared with a brushless DC motor, it has a lower cost and a simpler control strategy. At the same time, the controller in this application can determine the current direction and speed of the motor based on the current parameters collected by the current detection circuit and the operating parameters collected by the encoding circuit, so as to more accurately adjust the damping through the damping control circuit and achieve fine torque control and motion smoothness optimization. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a diagram of the drive circuit for a brushless DC motor in the prior art. Figure 2 A structural diagram of a damping adjustment circuit provided in an embodiment of this application; Figure 3 A circuit diagram of the upper bridge arm circuit provided in another embodiment of this application; Figure 4 A circuit diagram of the lower bridge arm circuit provided in another embodiment of this application; Figure 5 A circuit diagram of a protection circuit provided in another embodiment of this application; Figure 6 A circuit diagram of a current detection circuit provided in another embodiment of this application; Figure 7 A circuit diagram of an encoding circuit provided in another embodiment of this application; Figure 8 A circuit diagram of an active adjustment circuit provided in another embodiment of this application; Figure 9 A circuit diagram of a passive adjustment circuit provided in another embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0020] The core of this application is to provide a damping adjustment circuit and electronic device.

[0021] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 2 A structural diagram of a damping adjustment circuit provided in an embodiment of this application is shown below. Figure 2 As shown, it includes: controller 1, brushed DC geared motor 2, full-bridge circuit 3, current detection circuit 4, encoding circuit 5, and damping control circuit 6.

[0023] The specific connection relationship is as follows: the first input terminal of the controller 1 is connected to the first terminal of the brushed DC geared motor 2 through the current detection circuit 4; the second input terminal of the controller 1 is connected to the second terminal of the brushed DC geared motor 2 through the encoding circuit 5; the first output terminal of the controller 1 is connected to the first terminal of the brushed DC geared motor 2 through the full bridge circuit 3 and the current detection circuit 4; and the second output terminal of the controller 1 is connected to the third terminal of the brushed DC geared motor 2 through the damping control circuit 6.

[0024] In a specific embodiment, the current detection circuit 4 mainly collects the current parameters of the brushed DC geared motor 2 and sends them to the controller 1 through a connection with the controller 1, so that the controller 1 can determine the output current of the brushed DC geared motor 2 based on the current parameters; the encoding circuit 5 mainly collects the operating parameters of the brushed DC geared motor 2 and sends them to the controller 1 through a connection with the controller 1, so that the controller 1 can determine whether the brushed DC geared motor 2 is rotating forward or backward, that is, whether it is actively running or passively running; the controller 1 controls the rotation of the brushed DC geared motor 2 and adjusts the damping parameters in the damping control circuit 6 according to the current parameters and operating parameters.

[0025] In other words, the controller 1 controls the full-bridge circuit 3 to control the rotation speed and direction of the brushed DC geared motor 2. The current detection circuit 4 detects the real-time current of the brushed DC geared motor 2. Based on the detected current magnitude, the controller outputs PWM (Pulse Width Modulation) to control the damping control circuit 6, achieving dynamic analog adjustment of the damping parameters and thus constant resistance control. The encoding circuit 5 detects the speed and rotation direction (operating parameters) of the brushed DC geared motor 2, and the controller 1 further controls the damping control circuit 6. Therefore, precise control in both resistance control and constant power control modes can be achieved using current and speed detection methods.

[0026] It should be noted that the specific structure of the brushed DC geared motor 2 consists of a brushed DC motor and a gearbox.

[0027] The damping adjustment circuit provided in this application includes a controller, a brushed DC geared motor, a full-bridge circuit, a current detection circuit, an encoding circuit, and a damping control circuit. The first input terminal of the controller is connected to the first terminal of the brushed DC geared motor via the current detection circuit to acquire the current parameters of the brushed DC geared motor collected by the current detection circuit. The second input terminal of the controller is connected to the second terminal of the brushed DC geared motor via the encoding circuit to acquire the operating parameters of the brushed DC geared motor collected by the encoding circuit. The first output terminal of the controller is connected to the first terminal of the brushed DC geared motor via the full-bridge circuit and the current detection circuit to control the rotation of the brushed DC geared motor. The second output terminal of the controller is connected to the third terminal of the brushed DC geared motor via the damping control circuit to adjust the damping parameters in the damping control circuit according to the current parameters and operating parameters. Therefore, it can be seen that this application selects a brushed DC geared motor for the motor selection. Compared with a brushless DC motor, it has a lower cost and a simpler control strategy. At the same time, the controller in this application can determine the current direction and speed of the motor based on the current parameters collected by the current detection circuit and the operating parameters collected by the encoding circuit, so as to more accurately adjust the damping through the damping control circuit and achieve fine torque control and motion smoothness optimization.

[0028] Based on the above embodiments, as a preferred embodiment, the full-bridge circuit 3 includes: an upper bridge arm circuit, a lower bridge arm circuit, and a protection circuit. The circuit connections are as follows: the input terminals of the upper and lower bridge arm circuits together form the input terminal of the full-bridge circuit 3, which is connected to the first output terminal of the controller 1; the power supply terminals of the upper and lower bridge arm circuits are connected to the power supply terminals of the lower bridge arm circuits, and are both connected to a first voltage source; the connection terminals of the upper and lower bridge arm circuits are connected to the connection terminals of the lower bridge arm circuit and the protection circuit; the output terminal of the upper bridge arm circuit serves as the output terminal of the full-bridge circuit 3 and is connected to the input terminal of the current detection circuit 4.

[0029] like Figure 3 As shown, its upper bridge arm circuit includes: a first MOSFET Q1, a second MOSFET Q2, a first turn-off circuit (resistor R11, capacitor C11, diode D11), a second turn-off circuit (resistor R12, capacitor C12, diode D12), and a first filter circuit (inductor L1 and capacitor C13), as follows. Figure 4 As shown, the lower bridge arm circuit includes: a third MOSFET Q3, a fourth MOSFET Q4, a third turn-off circuit (resistor R13, capacitor C14, diode D13), a fourth turn-off circuit (resistor R14, capacitor C15, diode D14), a second filter circuit (inductor L2 and capacitor C16), and a bidirectional trigger diode D1. Figure 5 As shown, the protection circuit includes resistors R15-R18. In addition, Figures 3-5 GHA, GLA, GHB, and GLB are connected to the corresponding pins of controller 1 (the first output terminal of controller 1); VCC3 serves as the first voltage source; IP+ and IP- are connected to the current detection circuit 4; M_A and M_B are connected to the two ends of the brushed DC geared motor 2; SENSE is the connection terminal.

[0030] The connection relationship of its upper bridge arm circuit is as follows: the first terminal of the first shutdown circuit and the first terminal of the second shutdown circuit together serve as the input terminal of the upper bridge arm circuit and are connected to the input terminal of the lower bridge arm circuit and the first output terminal of the controller 1. The second terminal of the first shutdown circuit is connected to the gate of the first MOSFET Q1. The third terminal of the first shutdown circuit is connected to the drain of the first MOSFET Q1, the source of the second MOSFET Q2, and the first terminal of the first filter circuit. The second terminal of the second shutdown circuit is connected to the gate of the second MOSFET Q2, and the third terminal of the second shutdown circuit is grounded. The source of the first MOSFET Q1 serves as the power supply terminal of the upper bridge arm circuit and is connected to the power supply terminal of the lower bridge arm circuit and the first voltage source VCC3. The second terminal of the first filter circuit serves as the output terminal of the upper bridge arm circuit and is connected to the input terminal of the current detection circuit 4. The drain of the second MOSFET Q2 serves as the connection terminal of the upper bridge arm circuit and is connected to the connection terminal of the lower bridge arm circuit and the connection terminal of the protection circuit.

[0031] The connection relationship of the lower bridge arm circuit is as follows: the first terminal of the third turn-off circuit and the first terminal of the fourth turn-off circuit together serve as the input terminal of the lower bridge arm circuit, connected to the input terminal of the upper bridge arm circuit and the first output terminal of the controller 1. The second terminal of the third turn-off circuit is connected to the gate of the third MOSFET Q3. The third terminal of the third turn-off circuit is connected to the drain of the third MOSFET Q3, the source of the fourth MOSFET Q4, and the first terminal of the second filter circuit. The second terminal of the fourth turn-off circuit is connected to the gate of the fourth MOSFET Q4, and the third terminal of the fourth turn-off circuit is grounded. The source of the third MOSFET Q3 serves as the power supply terminal of the lower bridge arm circuit, connected to the power supply terminal of the upper bridge arm circuit and the first voltage source VCC3. The drain of the fourth MOSFET Q4 serves as the connection terminal of the lower bridge arm circuit, connected to the connection terminal of the upper bridge arm circuit and the connection terminal of the protection circuit, and is connected to the source of the third MOSFET Q3 through the bidirectional trigger diode D1.

[0032] It should be noted that the embodiments provided in this application are only one possible implementation method, and users can set them themselves according to their needs.

[0033] In a specific embodiment, a full-bridge circuit composed of Q1-Q4 is used, and its shutdown circuit (first shutdown circuit, second shutdown circuit, third shutdown circuit and fourth shutdown circuit) is used as a fast shutdown circuit for four mode transistors. The filter circuit (first filter circuit, second filter circuit, third filter circuit and fourth filter circuit) reduces the noise generated by the control transistor and the motor.

[0034] Based on the above embodiments, as a preferred embodiment, such as... Figure 6 As shown, its current detection circuit 4 includes: a current detection chip IC, an operational amplifier U1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and a second capacitor C2. The specific connections are as follows: the input pins ( / IP+, / IP+, / IP-, / IP-) of the current detection chip IC are connected to the output of the full-bridge circuit 3 as the input terminals of the current detection circuit 4; the power supply pin ( / VCC) of the current detection chip IC is connected to the first terminal of the first capacitor C1 and the first voltage source VCC3; the output pin ( / OUT) of the current detection chip IC is connected to the inverting input terminal of the operational amplifier U1, the first terminal of the second resistor R2, and the first terminal of the second capacitor C2 through the first resistor R1; the zero-crossing detection pin ( / ZVCR) of the current detection chip IC is connected to the non-inverting input terminal of the operational amplifier U1 through the third resistor R3; the output terminal of the operational amplifier U1 is connected to the second terminal of the second resistor R2 and the second terminal of the second capacitor C2, and together they serve as the output of the current detection circuit 4 and are connected to the first input terminal of the controller 1. In addition, the ground pin (GND) of the current detection chip IC is grounded; the first pin of the operational amplifier U1 is connected to the first voltage source VCC3, and the second pin is grounded.

[0035] It should be noted that the embodiments provided in this application are only one possible implementation method, and users can set them themselves according to their needs.

[0036] In a specific embodiment, a current detection circuit 4 is used to detect the current of the brushed DC geared motor 2. The current detection circuit 4 is connected in series in the motor circuit, with IP+ connected to IP+ in the full-bridge circuit 3 and IP- connected to IP- in the full-bridge circuit 3. An operational amplifier U1 is used to amplify and filter the collected current signal, and the output current signal is transmitted to the controller 1 for data processing.

[0037] Based on the above embodiments, as a preferred embodiment, such as... Figure 7 As shown, its encoding circuit 5 includes: an encoder, a connector J1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7. The specific connection relationships are as follows: the encoder is coupled to the brushed DC geared motor 2 and the controller 1; the encoder plug is connected to the socket of connector J1; the first end of connector J1 is connected to the first end of the fourth resistor R4, the first end of the fifth resistor R5, the first end of the sixth resistor R6, the first end of the third capacitor C3, and the first end of the fourth capacitor C4, and is connected to the second voltage source DC5V; the second end of connector J1 is connected to the second end of the fourth resistor R4 and the first end of the fifth capacitor C5; the third end of connector J1 is connected to the second end of the fifth resistor R5 and the first end of the sixth capacitor C6; the fourth end of connector J1 is connected to the second end of the sixth resistor R6 and the first end of the seventh capacitor C7; the fifth end of connector J1, the second end of the third capacitor C3, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, the second end of the sixth capacitor C6, and the second end of the seventh capacitor C7 are all grounded.

[0038] It should be noted that the embodiments provided in this application are only one possible implementation method, and users can set them themselves according to their needs.

[0039] In a specific embodiment, the encoder is coupled to the brushed DC geared motor 2 to observe the brushed DC geared motor 2, and then the observed data is processed to obtain the corresponding operating parameters, such as the motor speed and rotation direction.

[0040] Based on the above embodiments, as a preferred embodiment, the damping control circuit 6 includes an active adjustment circuit and a passive adjustment circuit, specifically connected as follows: the input terminals of the active adjustment circuit and the passive adjustment circuit together serve as the input terminals of the damping control circuit 6 and are connected to the second output terminal of the controller 4; the output terminal of the active adjustment circuit is connected to the positive terminal of the brushed DC geared motor 2; the output terminal of the passive adjustment circuit is connected to the negative terminal of the brushed DC geared motor 2; wherein, the positive terminal and the negative terminal of the brushed DC geared motor 2 constitute the third terminal of the brushed DC geared motor 2.

[0041] like Figure 8 As shown, its active regulation circuit includes: a first damping resistor J2, an eighth capacitor C8, a fifth MOSFET Q5, and a fifth shutdown circuit (resistor R19, diode D15, and capacitor C17). The first terminal of the first damping resistor J2 is connected to the first terminal of the eighth capacitor C8, and together they serve as the output terminal of the active regulation circuit and are connected to the positive terminal (M_B) of the brushed DC geared motor 2. The second terminal of the first damping resistor J2 is connected to the second terminal of the eighth capacitor C8 and the source of the fifth MOSFET Q5. The input terminal of the fifth shutdown circuit serves as the input terminal of the active regulation circuit and is connected to the second output terminal of the controller 1. The output terminal of the fifth shutdown circuit is connected to the gate of the fifth MOSFET Q5. The drain of the fifth MOSFET Q5 is grounded. GLZ is the pin connected to the controller 1 (the second output terminal of the controller 1).

[0042] like Figure 9 As shown, the passive regulation circuit includes: a second damping resistor J3, a ninth capacitor C9, a sixth MOSFET Q6, and a sixth turn-off circuit (resistor R20, diode D16, and capacitor C18). The first terminal of the second damping resistor J3 is connected to the first terminal of the ninth capacitor C9, and together they serve as the output terminal of the passive regulation circuit and are connected to the negative terminal (M_A) of the brushed DC geared motor 2. The second terminal of the second damping resistor J3 is connected to the second terminal of the ninth capacitor C9 and the source of the sixth MOSFET Q6. The input terminal of the sixth turn-off circuit serves as the input terminal of the passive regulation circuit and is connected to the second output terminal of the controller 1. The output terminal of the sixth turn-off circuit is connected to the gate of the sixth MOSFET Q6. The drain of the sixth MOSFET Q6 is grounded. GLY is the pin connected to the controller 1 (the second output terminal of the controller 1).

[0043] The fifth MOSFET Q5 and the sixth MOSFET Q6 are used as the control for the simulated load. Based on the forward and reverse rotation information detected by the encoder, the controller 1 outputs the required PWM signal to control the dynamic switching of the fifth MOSFET Q5 or the sixth MOSFET Q6, respectively, to simulate the adjustment of the damping resistor value and achieve precise control of constant power or constant resistance. In other words, through the damping control circuit 6, it is possible to accurately provide resistance when the equipment is in active motion, and to smoothly switch to passive motion mode.

[0044] Therefore, the damping adjustment circuit provided in this application has the following advantages: 1. This application uses only 4 MOS (Q1-Q4) to drive the motor, which reduces the number of MOS compared to the 6 MOS used in the prior art.

[0045] 2. The price of a brushed DC geared motor with the same power is much cheaper than that of a brushless motor alone.

[0046] 3. The control method does not require the use of complex six-step commutation method or FOC control method, reducing the difficulty and time of embedded work.

[0047] On the other hand, this application also provides an electronic device that includes the above-described damping adjustment circuit and has the same beneficial effects.

[0048] Since the embodiments provided in this application are the same as the embodiments of the damping adjustment circuit described above, they will not be described again here.

[0049] The foregoing has provided a detailed description of a damping adjustment circuit and electronic device provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0050] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A damping adjustment circuit, characterized in that, include: Controller, brushed DC geared motor, full-bridge circuit, current detection circuit, encoding circuit and damping control circuit; The first input terminal of the controller is connected to the first terminal of the brushed DC geared motor through the current detection circuit, and is used to obtain the current parameters of the brushed DC geared motor collected by the current detection circuit. The second input terminal of the controller is connected to the second terminal of the brushed DC geared motor through the encoding circuit, and is used to obtain the operating parameters of the brushed DC geared motor collected by the encoding circuit. The first output terminal of the controller is connected to the first terminal of the brushed DC geared motor through the full-bridge circuit and the current detection circuit, and is used to control the rotation of the brushed DC geared motor. The second output terminal of the controller is connected to the third terminal of the brushed DC geared motor through the damping control circuit, and is used to adjust the damping parameters in the damping control circuit according to the current parameters and the operating parameters.

2. The damping adjustment circuit according to claim 1, characterized in that, The full-bridge circuit includes: an upper bridge arm circuit, a lower bridge arm circuit, and a protection circuit; The input terminals of the upper bridge arm circuit and the lower bridge arm circuit together constitute the input terminal of the full bridge circuit, which is connected to the first output terminal of the controller. The power supply terminal of the upper bridge arm circuit is connected to the power supply terminal of the lower bridge arm circuit, and both are connected to the first voltage source. The connection terminal of the upper bridge arm circuit is connected to the connection terminal of the lower bridge arm circuit and the connection terminal of the protection circuit. The output terminal of the upper bridge arm circuit is connected to the input terminal of the current detection circuit as the output terminal of the full bridge circuit.

3. The damping adjustment circuit according to claim 2, characterized in that, The upper bridge arm circuit includes: a first MOSFET, a second MOSFET, a first shutdown circuit, a second shutdown circuit, and a first filter circuit; Wherein, the first terminal of the first shutdown circuit and the first terminal of the second shutdown circuit together serve as the input terminal of the upper bridge arm circuit, which is connected to the input terminal of the lower bridge arm circuit and the first output terminal of the controller. The second terminal of the first shutdown circuit is connected to the gate of the first MOS transistor, and the third terminal of the first shutdown circuit is connected to the drain of the first MOS transistor, the source of the second MOS transistor, and the first terminal of the first filter circuit. The second terminal of the second shutdown circuit is connected to the gate of the second MOS transistor, and the third terminal of the second shutdown circuit is grounded. The source of the first MOS transistor is connected to the power supply terminal of the upper bridge arm circuit, the power supply terminal of the lower bridge arm circuit, and the first voltage source. The second terminal of the first filter circuit is connected to the input terminal of the current detection circuit as the output terminal of the upper bridge arm circuit. The drain of the second MOS transistor is connected to the upper bridge arm circuit, the lower bridge arm circuit, and the protection circuit as the connection terminal.

4. The damping adjustment circuit according to claim 2, characterized in that, The lower bridge arm circuit includes: a third MOSFET, a fourth MOSFET, a third turn-off circuit, a fourth turn-off circuit, a second filter circuit, and a bidirectional trigger diode; Wherein, the first terminal of the third shutdown circuit and the first terminal of the fourth shutdown circuit together serve as the input terminal of the lower bridge arm circuit, which is connected to the input terminal of the upper bridge arm circuit and the first output terminal of the controller. The second terminal of the third shutdown circuit is connected to the gate of the third MOS transistor. The third terminal of the third shutdown circuit is connected to the drain of the third MOS transistor, the source of the fourth MOS transistor, and the first terminal of the second filter circuit. The second terminal of the fourth shutdown circuit is connected to the gate of the fourth MOS transistor, and the third terminal of the fourth shutdown circuit is grounded. The source of the third MOS transistor serves as the power supply terminal of the lower bridge arm circuit and is connected to the power supply terminal of the upper bridge arm circuit and the first voltage source. The drain of the fourth MOS transistor is connected to the lower bridge arm circuit, the upper bridge arm circuit, and the protection circuit as the connection terminal, and is connected to the source of the third MOS transistor through the bidirectional trigger diode.

5. The damping adjustment circuit according to claim 1, characterized in that, The current detection circuit includes: a current detection chip, an operational amplifier, a first resistor, a second resistor, a third resistor, a first capacitor, and a second capacitor; The input pin of the current detection chip is connected to the output of the full-bridge circuit as the input terminal of the current detection circuit. The power supply pin of the current detection chip is connected to the first terminal of the first capacitor and the first voltage source. The output pin of the current detection chip is connected to the inverting input terminal of the operational amplifier, the first end of the second resistor, and the first end of the second capacitor through the first resistor; The zero-crossing detection pin of the current detection chip is connected to the non-inverting input of the operational amplifier through the third resistor; The output terminal of the operational amplifier is connected to the second terminal of the second resistor and the second terminal of the second capacitor, and together they serve as the output terminal of the current detection circuit and are connected to the first input terminal of the controller.

6. The damping adjustment circuit according to claim 1, characterized in that, The encoding circuit includes: an encoder, a connector, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor; The encoder is coupled to the brushed DC geared motor and the controller, and the encoder plug is connected to the connector socket. The first end of the connector is connected to the first end of the fourth resistor, the first end of the fifth resistor, the first end of the sixth resistor, the first end of the third capacitor, and the first end of the fourth capacitor, and together they are connected to the second voltage source; The second end of the connector is connected to the second end of the fourth resistor and the first end of the fifth capacitor; The third terminal of the connector is connected to the second terminal of the fifth resistor and the first terminal of the sixth capacitor; The fourth terminal of the connector is connected to the second terminal of the sixth resistor and the first terminal of the seventh capacitor; The fifth terminal of the connector, the second terminal of the third capacitor, the second terminal of the fourth capacitor, the second terminal of the fifth capacitor, the second terminal of the sixth capacitor, and the second terminal of the seventh capacitor are all grounded.

7. The damping adjustment circuit according to claim 1, characterized in that, The damping control circuit includes: an active adjustment circuit and a passive adjustment circuit; The input terminals of the active adjustment circuit and the passive adjustment circuit are combined to serve as the input terminal of the damping control circuit and are connected to the second output terminal of the controller. The output terminal of the active adjustment circuit is connected to the positive terminal of the brushed DC geared motor; The output terminal of the passive adjustment circuit is connected to the negative terminal of the brushed DC geared motor; wherein, the positive terminal and the negative terminal of the brushed DC geared motor constitute the third terminal of the brushed DC geared motor.

8. The damping adjustment circuit according to claim 7, characterized in that, The active adjustment circuit includes: a first damping resistor, an eighth capacitor, a fifth MOSFET, and a fifth turn-off circuit; Wherein, the first end of the first damping resistor is connected to the first end of the eighth capacitor, and together they serve as the output terminal of the active adjustment circuit and are connected to the positive terminal of the brushed DC geared motor. The second end of the first damping resistor is connected to the second end of the eighth capacitor and the source of the fifth MOS transistor; The input terminal of the fifth shutdown circuit is connected to the second output terminal of the controller as the input terminal of the active adjustment circuit. The output terminal of the fifth shutdown circuit is connected to the gate of the fifth MOS transistor; The drain of the fifth MOS transistor is grounded.

9. The damping adjustment circuit according to claim 7, characterized in that, The passive adjustment circuit includes: a second damping resistor, a ninth capacitor, a sixth MOSFET, and a sixth turn-off circuit; Wherein, the first end of the second damping resistor is connected to the first end of the ninth capacitor, and together they serve as the output terminal of the passive adjustment circuit and are connected to the negative terminal of the brushed DC geared motor. The second terminal of the second damping resistor is connected to the second terminal of the ninth capacitor and the source of the sixth MOS transistor; The input terminal of the sixth shutdown circuit is connected to the second output terminal of the controller as the input terminal of the passive adjustment circuit. The output terminal of the sixth shutdown circuit is connected to the gate of the sixth MOS transistor; The drain of the sixth MOS transistor is grounded.

10. An electronic device, characterized in that, Includes the damping adjustment circuit as described in any one of claims 1-9.

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