Holder driving motor starting capacitor plate

Abstract

The utility model provides a pan-tilt driving motor starting capacitor board. The pan-tilt driving motor starting capacitor board comprises a switch interface module, an arc extinguishing module, a starting capacitor module and a network and power supply transmission interface module which are integrally configured on a circuit board, the arc extinguishing module is respectively connected with a motor limit switch of a holder driving motor, the camera device and the starting capacitor module through the switch interface module, and the network and power supply transmission interface module is configured to supply power to the camera device by external voltage and input network signals; in response to an electric energy signal sent to the pan-tilt driving motor by the camera device, the pan-tilt driving motor is controlled to act through the arc extinguishing module and the starting capacitor module; and in response to the moment that the contact of the trigger generator limit switch is disconnected, the arc extinguishing module absorbs transient voltage generated at the moment that the contact is disconnected so as to control the pan-tilt driving motor to stop acting. According to the application, the electric arc and sparking conditions generated by the position of the contact point in the limit switch during action in an alternating current power supply environment can be effectively inhibited, the contact point is effectively protected, the reliability is improved, the problem of control failure of the pan-tilt is avoided, and long-term stable operation of the pan-tilt is ensured.

Description

Technical Field

[0001] This application belongs to the technical field of video surveillance equipment, and in particular relates to a starting capacitor board for a pan-tilt drive motor. Background Technology

[0002] Motor starting capacitor boards are mainly used inside front-end monitoring equipment with steering pan-tilt-zoom (PTZ) drive capabilities driven by AC power systems. Unlike conventional indoor and outdoor monitoring environments, front-end monitoring equipment with PTZ drive capabilities in industrial monitoring environments is usually equipped with a heavy-duty casing to enhance its shock resistance in industrial environments. This places high demands on PTZ drive capabilities, so AC motors are typically used for steering control. Furthermore, different projects may incorporate various electrical function modules due to different equipment functional requirements, resulting in varying performance requirements for speed, torque, etc. This often necessitates the use of multiple AC steering motors with different performance characteristics, requiring the selection of different specifications of AC motor starting capacitors. Consequently, the AC motor starting capacitor board needs to be replaced, affecting the hardware versatility of the equipment.

[0003] In industrial environments, it is necessary to observe the target around the clock during operations. This requires frequent pan-tilt-zoom (PTZ) adjustments to change the viewing angle of the front-end monitoring equipment. The AC motor in the PTZ may experience arcing at the internal contact points of the limit switches, which can lead to high-temperature adhesion. This causes the PTZ to continuously rotate and deviate from the monitored target, becoming uncontrollable and severely affecting normal operations. Utility Model Content

[0004] In view of this, this application aims to propose a starting capacitor board for a gimbal drive motor to solve the problem of control failure caused by arcing and sparking of internal contact points of limit switches in front-end monitoring equipment in industrial environments.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] This application provides a starting capacitor board for a gimbal drive motor, including a switch interface module, an arc extinguishing module, a starting capacitor module, and a network and power transmission interface module integrated on the circuit board.

[0007] The arc extinguishing module is connected to the motor limit switch of the gimbal drive motor, the camera device and the starting capacitor module through the switch interface module. The network and power transmission interface module is configured to provide external voltage power and network signal input to the camera device.

[0008] In response to the camera device sending an electrical signal to the gimbal drive motor, the arc extinguishing module and the starting capacitor module are used to control the gimbal drive motor to operate.

[0009] In response to the moment the limit switch contact of the trigger motor opens, the arc extinguishing module absorbs the transient voltage generated at the moment the contact opens, so as to control the gimbal drive motor to stop operating.

[0010] Furthermore, the switch interface module includes a first switch interface and a second switch interface, wherein the first switch interface is connected to the motor limit switch via a cable, and the second switch interface is connected to the camera device via a cable;

[0011] The arc extinguishing module includes multiple arc extinguishing circuits, and each arc extinguishing circuit includes two arc extinguishing branches connected to the first switch interface. Each arc extinguishing branch includes an RC circuit composed of a first resistor, a first capacitor, and a second resistor connected in parallel.

[0012] One end of the first resistor is connected to the corresponding pins of the first switch interface and the second switch interface, and the other end of the first resistor is connected to the corresponding pins of the first switch interface and the adapter interface. The adapter interface is also connected to the first switch interface.

[0013] Furthermore, the second switch interface is an AC 24V common terminal and is connected to the two first switch interfaces to supply power to the common terminal of the pan / tilt motor.

[0014] Furthermore, the first resistor is a varistor.

[0015] Furthermore, the startup capacitor module includes multiple startup capacitor circuits, which are connected to the second switch interface. Each startup capacitor circuit consists of a second capacitor, a third capacitor, and a fourth capacitor connected in parallel.

[0016] Furthermore, the network and power transmission interface module includes two interconnected network and power transmission interfaces. One of the network and power transmission interfaces is connected to an external network device and an external power supply device via a cable, and the other network and power transmission interface is connected to the camera device via a cable.

[0017] Compared with the prior art, the gimbal drive motor starting capacitor board described in this application has the following advantages:

[0018] (1) This application can realize the arc extinguishing function of limit switch under AC power supply environment, suppress the arc and sparking generated by the internal contact point of limit switch when it is activated in AC power supply environment, effectively protect the contact point and improve reliability, avoid the gimbal control failure caused by the above situation, and ensure the long-term stable operation of gimbal;

[0019] (2) This application integrates the use of AC motor starting capacitors in different usage scenarios, and drives a variety of AC motors by changing the capacitor specifications at the starting capacitor board points, thus realizing the generalization of hardware design. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a circuit diagram of the switch interface module and arc extinguishing module described in the embodiments of this application;

[0022] Figure 2 This is a circuit diagram of the startup capacitor module described in an embodiment of this application;

[0023] Figure 3 This is a circuit diagram of the network and power transmission interface module described in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] This embodiment provides a gimbal drive motor starting capacitor board, including a switch interface module, an arc extinguishing module, a starting capacitor module, and a network and power transmission interface module integrated on the circuit board.

[0027] The arc extinguishing module is connected to the motor limit switch of the pan-tilt drive motor, the camera device and the starting capacitor module through the switch interface module. The network and power transmission interface module is configured to provide external voltage power supply and network signal input to the camera device.

[0028] In response to the camera device sending an electrical signal to the gimbal drive motor, the arc extinguishing module and the starting capacitor module are used to control the action of the gimbal drive motor.

[0029] In response to the moment the limit switch contact of the trigger motor opens, the arc extinguishing module absorbs the transient voltage generated at the moment the contact opens, so as to control the pan-tilt drive motor to stop operating.

[0030] Specifically, in this embodiment, when the project environment uses AC voltage to power the front-end camera device, the power input starts the capacitor board device, and the arc suppression circuit integrated inside the capacitor board automatically suppresses the arc generated when the contacts are opened. When the pan-tilt limit switch is opened, the arc suppression circuit absorbs the transient voltage at the moment the contacts are opened, and at the same time prevents the current from being too large when the contacts are closed, so as to avoid the limit switch contacts bearing a large amount of energy at the moment of action and ensure the long-term stable operation of the pan-tilt.

[0031] Meanwhile, in industrial environments, due to different equipment functional requirements, various types of electrical functional modules are equipped, which have different requirements for the load capacity, speed, torque, and other performance indicators of the AC motors used for steering. Therefore, different starting capacitors are required, which leads to the need to replace the AC motor starting capacitor board, significantly affecting the versatility of the equipment hardware. To address this, this embodiment integrates multiple independently replaceable capacitor access points inside the starting capacitor board. By changing the specifications of the access capacitors, various AC motors can be driven, avoiding the need for multiple different circuit configurations, thus enhancing versatility and meeting the needs of more application scenarios.

[0032] The overall workflow of the starting capacitor board device can be divided into a motor starting compensation section and a peak voltage absorption section. This embodiment takes two arc extinguishing circuits, two first switch interfaces, one second switch interface and one adapter interface as an example, and explains them in conjunction with the accompanying drawings.

[0033] When the entire system is working normally, switch interface CN4 is connected to the camera device via a cable. Based on the control level emitted by the camera device, it obtains the external power required for the motor's operation, which, in conjunction with the arc-extinguishing circuit, drives the corresponding motor to rotate in the specified direction; for example... Figure 1As shown, switch interface CN1 connects to the gimbal motor and the motor limit switches for the upward and downward rotation of the gimbal motor via cables. Specifically: CN1-1 interface connects to the downward rotation electrode of the gimbal motor via a cable, used to control the downward rotation of the gimbal motor; CN1-2 / 3 interface connects to the common terminal of the gimbal motor via a cable, used to supply power to the common terminal of the gimbal motor; CN1-4 interface connects to the upward rotation electrode of the gimbal motor via a cable, used to control the upward rotation of the gimbal motor; CN-1-5 / 6 interface connects to the downward rotation limit switch of the gimbal motor via a cable; and CN-1-7 / 8 interface connects to the upward rotation limit switch of the gimbal motor via a cable.

[0034] The CN6 switch interface connects to the gimbal motor and its left and right rotation limit switches via cables. Specifically: the CN6-1 interface connects to the right rotation electrode of the gimbal motor via a cable, used to control the gimbal motor to rotate to the right; the CN6-2 / 3 interfaces connect to the common terminal of the gimbal motor via a cable, used to supply power to the common terminal of the gimbal motor; the CN6-4 interface connects to the left rotation electrode of the gimbal motor via a cable, used to control the gimbal motor to rotate to the left; the CN-6-5 / 6 interfaces connect to the right rotation limit switch of the gimbal motor via a cable; and the CN-6-7 / 8 interfaces connect to the left rotation limit switch of the gimbal motor via a cable.

[0035] After electrical energy is input into this device through switch interface CN4, it is connected to the motor limit switch via the circuit board to switch interfaces CN1 and CN6. Then, the electrical energy is processed by the arc extinguishing circuit composed of RC circuit and varistor, and input into the starting capacitor circuit, which changes the current distribution in the motor winding, generates a rotating magnetic field, and finally inputs into the single-phase AC motor, making the motor run in the correct direction.

[0036] The CN4-1 interface connects to the RC circuit composed of C4 and R8, and the varistor R6 via the internal circuitry of the device. Specifically: electrical energy is input from the upper pin of capacitor C4, passing through C4 and the left pin of varistor R6, and then through the lower pin of C4 to resistor R8; after passing through R8, the energy flows through the right pin of varistor R6, causing varistor R6 to be connected in parallel with the RC circuit composed of C4 and R8, forming an arc-extinguishing circuit for the rightward rotation of the gimbal motor; the left pin of the arc-extinguishing circuit varistor R6 is connected to the CN6-7 interface, and the right pin is connected to the CN6-1 / 8 interface; the CN6-1 / 8 interface is connected to the CN5-1 interface, through which electrical energy is input to the starting capacitor circuit composed of capacitors C8, C9, and C10 (see diagram of the starting capacitor circuit). Figure 2 (As shown).

[0037] The CN4-2 interface connects to the RC circuit composed of C3 and R7 and the varistor R5 through the internal circuitry of the device. Specifically: electrical energy is input from the upper pin of capacitor C3, passing through C3 and the left pin of varistor R5, and then through the lower pin of C3 to resistor R7; after passing through R7, the energy flows through the right pin of varistor R5, causing varistor R5 to be connected in parallel with the RC circuit composed of C3 and R7, forming an arc-extinguishing circuit for the leftward rotation of the gimbal motor; the left pin of the arc-extinguishing circuit varistor R5 is connected to the CN6-5 interface, and the right pin of the arc-extinguishing circuit varistor R6 is connected to the CN6-4 / 6 interface; the CN6-4 / 6 interface is connected to the CN5-2 interface, through which electrical energy is input to the starting capacitor circuit composed of capacitors C8, C9, and C10.

[0038] The CN4-5 interface connects to the RC circuit composed of C1 and R3 and the varistor R1 through the internal circuitry of the device. Specifically: electrical energy is input from the upper pin of capacitor C1, passing through C1 and the left pin of varistor R1, and then through the lower pin of C1 to resistor R3; after passing through R3, the electrical energy flows through the right pin of varistor R1, causing varistor R1 to be connected in parallel with the RC circuit composed of C3 and R1, forming an arc-extinguishing circuit for the downward rotation of the motor on the pan-tilt unit; the left pin of the arc-extinguishing circuit varistor R1 is connected to the CN1-5 interface, and the right pin is connected to the CN1-1 / 6 interface; the CN1-1 / 6 interface is connected to the CN5-3 interface, through which electrical energy is input to the starting capacitor circuit composed of capacitors C5, C6, and C7.

[0039] The CN4-6 interface connects to the RC circuit composed of C2 and R4 and the varistor R2 through the internal circuitry of the device. Specifically: electrical energy is input from the upper pin of capacitor C2, passing through C2 and the left pin of varistor R2, and then through the lower pin of C2 to resistor R4; after passing through R4, the electrical energy flows through the right pin of varistor R2, causing varistor R2 to be connected in parallel with the RC circuit composed of C2 and R4, forming an arc-extinguishing circuit for the upward rotation of the motor on the pan-tilt unit; the left pin of the arc-extinguishing circuit varistor R2 is connected to the CN1-7 interface, and the right pin is connected to the CN1-4 / 8 interface; the CN1-4 / 8 interface is connected to the CN5-4 interface, through which electrical energy is input to the starting capacitor circuit composed of capacitors C5, C6, and C7.

[0040] The CN4-3 / 4 interface is an AC 24V common terminal, which is connected to the switch interfaces CN1-2 / 3 and CN6-2 / 3 through internal circuitry and is used to power the common terminal of the gimbal motors. The starting capacitor circuit composed of C5, C6, and C7 is connected in parallel with the gimbal motor. After the electrical energy is processed by the starting capacitor circuit, it is input to the gimbal motor. The starting capacitor circuit composed of C8, C9, and C10 is connected in parallel with the gimbal motor. After the electrical energy is processed by the starting capacitor circuit, it is input to the gimbal motor.

[0041] This embodiment adopts a low-cost design scheme of RC absorption circuit plus varistor, which is different from magnetic blowout arc extinguishing, gas arc extinguishing and other solutions. It achieves the arc extinguishing function of AC motor at a lower cost, and reduces the overall cost while taking into account the function and ensuring accuracy.

[0042] Taking the upward rotation of the pan-tilt unit as an example, the camera continuously outputs AC 24V N-pole power to the CN4-3 / 4 interface controlling this start-up capacitor board. Simultaneously, the power is transmitted through the internal circuitry of this device to interfaces CN1-2 / 3 and CN6-2 / 3. When the pan-tilt unit needs to rotate upward to obtain an upward viewing angle, the camera controls CN4-6 of this start-up capacitor board to provide AC power to the interface. With 24V power, at this time, only the common terminal of the CN4-6 and CN4-3 / 4 interfaces is powered; the other interfaces receive no power. Power is input from the CN4-6 interface through the internal circuitry of the device, via the RC circuit composed of C2 and R4, and the varistor R2. Power is input from the upper pin of capacitor C2, passing through C2 and the left pin of varistor R2, and then through the lower pin of C2 to resistor R4. After passing through R4, the power flows through the right pin of varistor R2. The left pin of the arc-extinguishing circuit varistor R2 is connected to the CN1-7 interface, and the right pin is connected to the CN1-4 / 8 interface. Power then passes through the arc-extinguishing circuit on the pan-tilt unit, which is formed by the parallel connection of varistor R2, C2, and R4, in the direction of the upward rotation of the motor, before being input to the CN1-7 / 8 interface. The motor limit switch for the upward rotation of the gimbal motor is input through the CN1-7 interface and output through the CN1-8 interface to the CN1-4 interface in the upward rotation direction of the gimbal motor. At the same time, the CN1-4 / 8 interface is connected to the CN5-4 interface. Through the CN5-4 interface, the power is input to the starting capacitor circuit composed of capacitors C5, C6, and C7, and the processed power is transmitted to the gimbal motor through the CN5-3 interface, enabling the gimbal motor to complete the upward rotation. When the gimbal limit mechanism triggers the motor limit switch for the upward rotation of the gimbal motor, the switch is in the open state. At this time, the circuit composed of the CN1-7 / 8 interface is cut off, the power output from the CN1-8 interface to the CN1-4 interface in the upward rotation direction of the gimbal motor disappears, and the gimbal motor stops rotating upward.

[0043] The CN2 interface of the network and power transmission interface circuit serves as the external voltage power supply and network signal input interface for the camera device. During normal system operation, it connects to the CN2 interface via a cable to transmit the power and network required for normal operation of the camera device. It also connects to the CN3 interface via the internal wiring of this starter capacitor board for power and network signal switching. Specifically: the CN2-1 interface connects to an external network device via a cable to transmit the network signal TX+; the CN2-2 interface connects to an external network device via a cable to transmit the network signal TX-; the CN2-3 interface connects to an external network device via a cable to transmit the network signal RX+; the CN2-4 interface connects to an external network device via a cable to transmit the network signal RX-; the CN2-5 / 6 / 7 / 8 interfaces are reserved interfaces; the CN2-9 / 10 interfaces connect to an external power supply device via a cable to transmit AC 24V L power; and the CN211 / 124 interfaces connect to an external power supply device via a cable to transmit AC 24V N power.

[0044] The camera device uses a cable to connect to the CN3 interface to obtain the power and communication network required for normal operation. Specifically: the CN3-1 interface connects to the camera device via a cable for AC 24V N power supply; the CN3-2 interface connects to the camera device via a cable for AC 24V L power supply; the CN3-3 / 4 / 5 / 6 interfaces are reserved; the CN3-7 interface connects to the camera device via a cable for transmitting network signal RX-; the CN3-8 interface connects to the camera device via a cable for transmitting network signal RX+; the CN3-9 interface connects to the camera device via a cable for transmitting network signal TX-; and the CN3-10 interface connects to the camera device via a cable for transmitting network signal TX+.

[0045] like Figure 3 As shown, the corresponding connection relationships of the network and power transmission interface circuits CN2 and CN3 are as follows: CN2-1 interface is connected to CN3-10 interface for transmitting network signal TX+; CN2-2 interface is connected to CN3-9 interface for transmitting network signal TX-; CN2-3 interface is connected to CN3-8 interface for transmitting network signal RX+; CN2-4 interface is connected to CN3-7 interface for transmitting network signal RX-; CN2-5 interface is connected to CN3-6 interface; CN2-6 interface is connected to CN3-5 interface; CN2-7 interface is connected to CN3-4 interface; CN2-8 interface is connected to CN3-3 interface; CN2-9 / 10 interface is connected to CN3-2 interface for AC 24V L power supply; CN2-11 / 12 interface is connected to CN3-1 interface for AC 24V N power supply.

[0046] This starting capacitor board device differs from traditional starting capacitor board circuits by integrating an arc extinguishing circuit, a changeable starting capacitor module, and network power transmission functionality, enabling the front-end monitoring equipment to achieve a high degree of integration while fulfilling multiple functions.

[0047] When the external power supply is disconnected, the motor, acting as an inductive load, experiences voltage spikes, surges, and electromagnetic interference due to switching operations or sudden changes in the inductive load. This generates a microsecond-level induced electromotive force (EMF) at the moment of power failure. The amplitude of this induced EMF can be several times that of the normal operating voltage. The calculation formula is as follows:

[0048]

[0049] This high voltage will break down the air between the contacts, forming an electric arc, leading to contact erosion and electromagnetic interference. At this time, the arc-extinguishing function of the RC circuit connected in parallel across the switch contacts takes effect, and the RC circuit absorbs the induced electromotive force of the inductive load, wherein:

[0050] ① Capacitor C absorbs transient energy: At the instant the switch is opened, the back electromotive force of the inductive load charges the capacitor. The capacitor's voltage cannot change abruptly, effectively "buffering" the transient high voltage into the capacitor, preventing the voltage between the contacts from rising instantaneously to the point of breaking down the air and avoiding arcing. At the same time, the capacitor absorbs the energy released by the inductor, and its calculation formula is as follows:

[0051]

[0052] Capacitors convert the energy released by inductors into electric field energy, thus reducing the energy of electric arcs.

[0053] ② Resistor R limits current and energy dissipation: The resistor is connected in series in the capacitor circuit to limit the capacitor's charging current, preventing excessive surge current caused by rapid discharge when the capacitor contacts are closed, which could damage the contacts or circuit. At the same time, the resistor dissipates the energy stored in the capacitor as heat, as calculated using the following formula:

[0054]

[0055] To prevent energy from oscillating repeatedly in the circuit.

[0056] When the contacts are open, the back electromotive force generated by the inductive load forms a closed path through the RC circuit. The current charges the capacitor through the resistor, and the voltage gradually rises, preventing high-voltage breakdown between the contacts. When the contacts are closed, the capacitor discharges through the resistor and the contacts. The resistor limits the discharge current, preventing sparks from being generated by capacitor discharge when the contacts are closed, thereby protecting electronic components and improving system reliability.

[0057] Meanwhile, the arc-extinguishing circuit incorporates a varistor with an extremely short response time. It suppresses arc generation by clamping voltage and absorbing transient energy. Under normal conditions, when the voltage is below the varistor's threshold voltage, its resistance is extremely high (close to that of an insulator), allowing only microampere-level leakage current. When the voltage exceeds the threshold voltage, the varistor's resistance drops sharply, entering a conducting state, allowing large current to flow and clamping the voltage between the contacts within a safe range. When the pan-tilt unit is operating normally, the varistor clamps the back electromotive force of the inductive load, limiting it to near the varistor's threshold voltage, preventing the voltage between the contacts from exceeding the air breakdown threshold. Simultaneously, the varistor converts transient energy into heat, preventing energy release between the contacts and the formation of an arc. Its calculation formula is as follows:

[0058]

[0059] When different electrical function modules are selected according to the functions of different front-end monitoring devices, the capacitor specifications of the starting capacitor module can be replaced to achieve the best performance of the pan-tilt-zoom capability of the front-end monitoring device.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, 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 or all of the technical features. Such 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 utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0061] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A starting capacitor board for a gimbal drive motor, characterized in that: This includes a switch interface module, an arc extinguishing module, a startup capacitor module, and a network and power transmission interface module integrated on the circuit board; The arc extinguishing module is connected to the motor limit switch of the gimbal drive motor, the camera device and the starting capacitor module through the switch interface module. The network and power transmission interface module is configured to provide external voltage power and network signal input to the camera device. In response to the camera device sending an electrical signal to the gimbal drive motor, the arc extinguishing module and the starting capacitor module are used to control the gimbal drive motor to operate. In response to the moment the limit switch contact of the trigger motor opens, the arc extinguishing module absorbs the transient voltage generated at the moment the contact opens, so as to control the gimbal drive motor to stop operating.

2. The gimbal drive motor starter capacitor board according to claim 1, characterized in that: The switch interface module includes a first switch interface and a second switch interface, wherein the first switch interface is connected to the motor limit switch via a cable, and the second switch interface is connected to the camera device via a cable. The arc extinguishing module includes multiple arc extinguishing circuits, and each arc extinguishing circuit includes two arc extinguishing branches connected to the first switch interface. Each arc extinguishing branch includes an RC circuit composed of a first resistor, a first capacitor, and a second resistor connected in parallel. One end of the first resistor is connected to the corresponding pins of the first switch interface and the second switch interface, and the other end of the first resistor is connected to the corresponding pins of the first switch interface and the adapter interface. The adapter interface is also connected to the first switch interface.

3. The gimbal drive motor starter capacitor board according to claim 2, characterized in that: The second switch interface is an AC 24V common terminal and is connected to the two first switch interfaces to supply power to the common terminal of the pan / tilt motor.

4. The gimbal drive motor starter capacitor board according to claim 2, characterized in that: The first resistor is a varistor.

5. The gimbal drive motor starter capacitor board according to claim 2, characterized in that: The startup capacitor module includes multiple startup capacitor circuits, which are connected to the second switch interface. Each startup capacitor circuit consists of a second capacitor, a third capacitor, and a fourth capacitor connected in parallel.

6. The gimbal drive motor starter capacitor board according to claim 1, characterized in that: The network and power transmission interface module includes two interconnected network and power transmission interfaces. One of the network and power transmission interfaces is connected to an external network device and an external power supply device via a cable, and the other network and power transmission interface is connected to the camera device via a cable.

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