Control Circuit and Control Device

Abstract

The present invention provides a control circuit and a control device, relating to the technical field of circuit design. The control circuit includes: a controller, n control circuits, and n working components. The controller is electrically connected to all n control circuits, and the n control circuits are electrically connected to the n working components in one-to-one correspondence. Each working component includes: a motor and a moving part, and the motor is electrically connected to the moving part. The control circuit is used to determine the target current direction input to both poles of the motor according to the control signal of the controller, and the motor is used to drive the moving part to move according to the target current direction. The present invention uses a hardware logic control circuit to realize the sequential movement of multiple motors, and the circuit logic is simple, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the field of circuit design, and particularly to a control circuit and a control device. Background Art

[0002] In a motion control system, the use of motors is usually involved. The movement of the motors drives the change of the positions of components in the circuit structure. When the system is slightly complex, the continuous motion control of multiple motors may be involved.

[0003] Due to the sequential movement order of the motors and the change of the movement directions of the motors, in the prior art, a software control method is generally used to control the movement of the motors. The motors are controlled to move sequentially through software logic, and then the software controls the switching of the positive and negative poles of the motor power supply to change the movement direction of the motors.

[0004] Because the software control logic is complex, it is vulnerable to external interference, and the safety factor is relatively low. There are potential hazards such as freezing and runaway during operation, resulting in equipment damage and harm to personal safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a control circuit and a control device for eliminating potential safety hazards and protecting equipment by using a hardware circuit design method in view of the above deficiencies in the prior art. To achieve the above purpose, the technical solutions adopted in the embodiments of the present invention are as follows:

[0006] In a first aspect, an embodiment of the present invention provides a control circuit, including: a controller, n control circuits, and n working components, where n is an integer greater than 0;

[0007] The controller is electrically connected to all n control circuits, and the n control circuits are electrically connected to the n working components in a one-to-one correspondence;

[0008] Each working component includes: a motor and a moving component, and the motor is electrically connected to the moving component;

[0009] The control circuit is configured to determine the target current direction input to both poles of the motor according to the control signal of the controller, and the motor is configured to drive the moving component to move according to the target current direction.

[0010] Optionally, the moving component is a telescopic component, and the motor drives the telescopic component to extend or retract according to the target current direction.

[0011] Optionally, it further includes two limit switches, and the limit switches are electrically connected to the motor and are disposed at preset positions;

[0012] When the telescopic component moves within a preset range of the preset position, it touches the limit switch to update the state.

[0013] Optionally, the preset position includes: the maximum position at which the telescopic member contracts, and / or the maximum position at which the telescopic member extends, and any position between the maximum position at which the telescopic member contracts and the maximum position at which the telescopic member extends.

[0014] Optionally, it further includes: a protection circuit; one end of the protection circuit is electrically connected to the controller, and the other end is electrically connected to the working component;

[0015] The protection circuit is used to obtain the current input to the working component and determine whether to cut off the circuit according to the current input to the working component.

[0016] Optionally, the protection circuit includes: an overcurrent protection switch, a monitoring chip, and an overcurrent protection relay;

[0017] One end of the overcurrent protection switch is connected to the working component, and the other end is connected to the power supply; one end of the monitoring chip is connected to the controller, the other end is connected to one end of the overcurrent protection relay, and the other end of the overcurrent protection relay is connected to the working component;

[0018] The monitoring chip is used to obtain the current input to the working component and control the overcurrent protection relay to disconnect or close according to the current input to the working component.

[0019] Optionally, it further includes: a monitoring circuit; one end of the monitoring circuit is connected to the controller, and the other end is connected to the working component;

[0020] The monitoring circuit is used to monitor the motion state information of the moving parts in the working component and send the motion state information to the controller.

[0021] Optionally, the monitoring circuit includes: a voltage sampling chip, an isolation chip;

[0022] Two pins of the voltage sampling chip are respectively connected to the positive and negative poles of the working component for obtaining the working voltage of the working component;

[0023] The voltage sampling chip is communicatively connected to the isolation chip, and the isolation chip is communicatively connected to the controller;

[0024] The voltage sampling chip sends the working voltage of the working component to the controller through the isolation chip.

[0025] Optionally, the control circuit includes: a relay; the relay is connected in parallel with the motor, and the control signal input end of the relay is connected to the controller.

[0026] In a second aspect, an embodiment of the present invention further provides a control device, including: a load and the control circuit as described in the first aspect;

[0027] The load is connected to the moving part, and the moving part drives the load to move.

[0028] The beneficial effects of the present invention are:

[0029] The present invention provides a control circuit and a control device. The control circuit includes: a controller, n control circuits, and n working components. The controller is electrically connected to all n control circuits, and the n control circuits are electrically connected to the n working components in one-to-one correspondence. Each working component includes: a motor and a moving part, and the motor is electrically connected to the moving part. The control circuit is used to determine the target current direction input to both poles of the motor according to the control signal of the controller, and the motor is used to drive the moving part to move according to the target current direction. The present invention uses a hardware logic control circuit to realize the sequential movement of multiple motors, and the circuit logic is simple, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Schematic diagram of the control circuit structure provided by an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the control circuit structure provided by an embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the control circuit working provided by an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the control circuit structure provided by an embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the protection circuit structure provided by an embodiment of the present invention;

[0036] Figure 6 Schematic diagram of the monitoring circuit structure provided by an embodiment of the present invention;

[0037] Figure 7 Schematic diagram of the control device structure provided by an embodiment of the present invention.

[0038] Icons: 100 - Controller; 110 - Control Circuit; 111 - Relay; 1111 - Normally Open Contact; 1112 - Normally Closed Contact; 120 - Working Component; 121 - Motor; 1211 - First Motor; 1212 - Second Motor; 1213 - Third Motor; 122 - Moving Part; 123 - Limit Switch; 1231 - Second Motor Starting Switch; 1232 - First Motor Ending Switch; 1233 - Third Motor Starting Switch; 1234 - Second Motor Ending Switch; 124 - Normally Open Node; 125 - Normally Closed Node; 130 - Protection Circuit; 131 - Overcurrent Protection Switch; 132 - Monitoring Chip; 133 - Overcurrent Protection Relay; 140 - Monitoring Circuit; 141 - Voltage Sampling Chip; 150 - Load. Detailed Implementation Manner

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0043] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] As Figure 1 shown, Figure 1 is a schematic diagram of a control circuit structure provided by an embodiment of the present invention. It includes: a controller 100, n control circuits 110, and n working components 120, where n is an integer greater than 0. The controller 100 is electrically connected to all n control circuits 110, and the n control circuits 110 are electrically connected to the n working components 120 in one-to-one correspondence.

[0046] Each working component 120 includes: a motor 121 and a moving component 122, and the motor 121 is electrically connected to the moving component 122.

[0047] The control circuit 110 is used to determine the target current direction input to both poles of the motor 121 according to the control signal of the controller 100, and the motor 121 is used to drive the moving component 122 to move according to the target current direction.

[0048] It should be noted that the controller 100 can issue a control instruction, and through the control instruction, it controls the control circuit 110 to further control the movement of the moving component 122.

[0049] Among them, the above-mentioned motor 121 drives the moving component 122 to move according to the target current direction, and the movement modes can include: forward rotation, reverse rotation, extension, contraction, etc.

[0050] The way this application realizes the movement of the motor 121 is to provide a target DC power supply of 24V to the motor 121. When the direction of the target current applied across the two ends of the motor 121 is forward, the moving component 122 moves in the same direction. When the direction of the target current applied across the two ends of the motor 121 is reverse, the moving component 122 moves in the opposite direction. For example, for telescopic movement, when the direction of the target current applied across the two ends of the motor 121 is forward, the moving component 122 makes an extending movement. When the direction of the target current applied across the two ends of the motor 121 is reverse, the moving component 122 makes a retracting movement. Regarding the specific movement mode of the moving component 122, this application does not make any restrictions and shall be subject to the actual movement requirements.

[0051] The control circuit provided by this application includes: a controller 100, n control circuits 110, and n working components 120, and the n control circuits 110 are electrically connected to the n working components 120 in one-to-one correspondence. Among them, the working component 120 includes: a motor 121 and a moving component 122, and the motor 121 can control the movement of the moving component 122. By the controller 100 sending control instructions, the n control circuits 110 respectively control the movement of the n working components 120. Through the hardware logic circuit, the sequential movement of multiple motors 121 is realized, and the circuit logic is simple, safe, and reliable.

[0052] Further, the moving component 122 is a telescopic component, and the motor 121 drives the telescopic component to extend or retract according to the direction of the target current.

[0053] When the moving component 122 is a telescopic component, when the direction of the target current applied across the two ends of the motor 121 is forward, the telescopic component makes an extending movement. When the direction of the target current applied across the two ends of the motor 121 is reverse, the telescopic component makes a retracting movement.

[0054] It should be noted that the retracting component provided in this embodiment can be a lead screw, but this application is not limited to the lead screw and can also be other straight rod components, specifically subject to the actual requirements.

[0055] Even further, one end of the telescopic component is connected to the motor 121, and the other end can be connected to the corresponding control unit. The corresponding functions of the corresponding control unit are realized through the extension or retraction of the telescopic component.

[0056] For example, the corresponding control unit can be an electric door. When a positive voltage is applied to the motor 121, the telescopic rod makes an extending movement, so that the telescopic rod drives the electric door to open. When a reverse voltage is applied to the motor 121, the telescopic rod makes a retracting movement, so that the telescopic rod drives the electric door to close.

[0057] It should be further noted that the above-mentioned corresponding control unit includes but is not limited to an electric door.

[0058] Further, the n control circuits 110 respectively control the movement of the motors 121 in the n working components 120. A corresponding control unit is connected to the rear of each telescopic rod, and the n telescopic rods control the movement of the n control units. The movement modes of controlling the n control units include: the n control units move simultaneously, and the n control units move sequentially.

[0059] If it is necessary for the n control units to move simultaneously, the controller 100 issues a control instruction to extend or retract. The n control circuits 110 respectively control the n motors 121 in the n working components 120, and drive the n telescopic rods to extend or retract simultaneously, thereby controlling the corresponding control units to perform corresponding control movements.

[0060] Such as Figure 2 shown, Figure 2 is a schematic diagram of the control circuit structure provided by an embodiment of the present invention.

[0061] If it is necessary for the n control units to move sequentially, the control circuit provided by the present application further includes 2 limit switches 123. The limit switches 123 are electrically connected to the motor 121 and are placed at preset positions. When the telescopic member moves within a preset range of the preset position, it touches the limit switch 123 to update the state.

[0062] Optionally, according to actual requirements, one limit switch 123 can be set at the preset starting position of the telescopic rod, and the other limit switch 123 can be set at the preset ending position of the telescopic rod. When the motor 121 moves near the limit switch 123 and touches the limit switch 123, if it is still within the allowable range of the limit switch 123, the motor 121 continues to move and the switch does not act. If it exceeds the allowable range of the limit switch 123, the switch disconnects and the motor 121 stops working.

[0063] Further, the limit switch 123 can be a single-pole double-throw switch.

[0064] Optionally, the preset positions include: the maximum position where the telescopic member contracts, and / or the maximum position where the telescopic member extends, and any position between the maximum position where the telescopic member contracts and the maximum position where the telescopic member extends.

[0065] Optionally, the control circuit 110 provided in this embodiment includes: a relay 111. The relay 111 is connected in parallel with the motor 121, and the control signal input end of the relay 111 is connected to the controller 100.

[0066] Further, to achieve the sequential movement of multiple motors 121, please refer to Figure 3 , Figure 3 is a schematic diagram of the control circuit operation provided by an embodiment of the present invention.

[0067] Taking the example of the second motor 1212 driving the moving part 122 to automatically extend and retract:

[0068] The second motor 1212 makes an automatic extension movement: The controller 100 issues a forward rotation command for the motor 121. The normally open contact 1111 of the relay 111 in the control circuit 110 closes, and the normally closed contact 1112 opens. And supply Figure 3 The positive terminal of the 24V DC power supply is connected to the A end in, and the negative terminal of the 24V DC power supply is connected to the B end. When the telescopic rod of the first motor 1211 fully extends to the preset position, the normally open node 124 of the first motor end switch 1232 closes, and the normally closed node 125 opens. At this time, the first motor 1211 automatically cuts off the power supply and stops moving. Since the normally open contact 1111 of the relay 111 is in the closed state, the positive terminal power supply of the second motor 1212 is automatically connected.

[0069] After the controller 100 issues a forward rotation command for the motor 121, the normally closed node 125 of the second motor end switch 1234 is always in the closed state, the negative terminal power supply of the second motor 1212 is always conducting, and the two ends of the second motor 1212 are connected to a 24V positive DC voltage. Therefore, the second motor 1212 starts to rotate forward, driving the telescopic rod to make an extension movement. When the telescopic rod moves to the second motor end switch 1234, it continues to make an extension movement until it exceeds the maximum range allowed by the second motor end switch 1234. The normally closed node 125 of the second motor end switch 1234 opens, and the negative terminal power supply of the second motor 1212 is cut off. Therefore, the second motor 1212 stops moving. Since the normally closed node 125 of the second motor end switch 1234 opens and the normally open node 124 closes at the same time, the positive power supply of the third motor 1213 is automatically connected.

[0070] The second motor 1212 makes an automatic retraction movement: The controller 100 issues a reverse rotation command for the motor 121. The normally closed contact 1112 of the relay 111 in the control circuit 110 closes, and the normally open contact 1111 opens. And supply Figure 3 The negative terminal of the 24V DC power supply is connected to the A end in, and the positive terminal of the 24V DC power supply is connected to the B end. When the telescopic rod of the third motor 1213 retracts to the preset position, the normally closed node 125 of the third motor start switch 1233 opens, and the normally open node 124 closes. At this time, the power supply of the third motor 1213 is cut off, and the third motor 1213 stops moving. When the normally closed node 125 of the third motor start switch 1233 opens, the normally open node 124 closes at the same time. Therefore, the negative terminal power supply of the second motor 1212 is automatically connected.

[0071] After the controller 100 issues a reverse instruction for the motor 121, the normally closed node 125 of the second motor starting switch 1231 remains closed all the time, the positive power supply of the second motor 1212 is always connected, and since the positive power supply is cracked at end A and the negative power supply is connected to section B, a 24V reverse DC voltage is applied across the second motor 1212. Therefore, the second motor 1212 starts to rotate in reverse, driving the telescopic rod to contract. After the telescopic rod moves to the position of the second motor starting switch 1231, it continues to contract until it exceeds the maximum range allowed by the second motor starting switch 1231. At this time, the normally closed node 125 of the second motor starting switch 1231 disconnects, the positive power supply of the second motor 1212 is cut off, and the second motor 1212 automatically stops moving. When the normally closed node 125 of the second motor starting switch 1231 comes, the normally open node 124 closes, automatically connecting the negative power supply of the first motor 1211.

[0072] The process of n motors 121 controlling n telescopic rods to perform continuous extension movements and continuous retraction movements is the same as the above process and will not be elaborated here.

[0073] Further, please refer to Figure 4 、 Figure 5 , Figure 4 which is a schematic diagram of the control circuit structure provided by an embodiment of the present invention, Figure 5 and which is a schematic diagram of the protection circuit structure provided by an embodiment of the present invention.

[0074] To protect the components of the control circuit provided in this application, on the basis of the above circuit, a protection circuit 130 is further included. Among them, the protection circuit 130 is to prevent the motor 121 from being burned due to excessive current generated during the movement of the motor 121.

[0075] One end of the protection circuit 130 is electrically connected to the controller 100, and the other end is electrically connected to the working component 120. The protection circuit 130 is used to obtain the current input to the working component 120 and determine whether to cut off the circuit according to the current input to the working component 120.

[0076] Further, the protection circuit 130 includes: an overcurrent protection switch 131, a monitoring chip 132, and an overcurrent protection relay 133.

[0077] One end of the overcurrent protection switch 131 is connected to the working component 120, and the other end is connected to the power supply. One end of the monitoring chip 132 is connected to the controller 100, the other end and one end of the overcurrent protection relay 133 are connected, and the other end of the overcurrent protection relay 133 is connected to the working component 120. The monitoring chip 132 is used to obtain the current input to the working component 120 and control the overcurrent protection relay 133 to disconnect or close according to the current input to the working component 120.

[0078] Among them, the way for the overcurrent protection switch 131 to protect the circuit is to connect the switch chip in series in the power supply. If the overcurrent protection switch 131 detects that the current passing through its own internal part exceeds the preset allowable value, it will automatically disconnect the internal switch of the chip, cut off the power supply, and the motor 121 will lose power and stop rotating.

[0079] Furthermore, the monitoring chip 132 detects whether there is overcurrent in the circuit through software, and then protects the circuit. The specific method is that one end of the monitoring chip 132 is communicatively connected to the controller 100. The controller 100 obtains the real-time working current of the motor 121 and judges whether the current value exceeds the preset allowable value. If it exceeds, the controller 100 controls the overcurrent protection relay 133 to disconnect. At this time, the current can no longer flow into the working circuit, thereby protecting this control circuit.

[0080] It should be noted that when the overcurrent protection switch 131 and the monitoring chip 132 protect the circuit, they work simultaneously and independently. As long as any one of them responds and cuts off the power supply of the motor 121, all the motors 121 will not be able to work.

[0081] Furthermore, please continue Figure 4 The control circuit further includes: a monitoring circuit 140. One end of the monitoring circuit 140 is connected to the controller 100, and the other end is connected to the working component 120.

[0082] The monitoring circuit 140 is used to monitor the motion state information of the moving part 122 in the working component 120 and send the motion state information to the controller 100.

[0083] Among them, the above-mentioned motion state information of the moving part 122 includes: states such as being extended, completed extension, being retracted, completed retraction, and failure. It can facilitate relevant technical personnel to clarify the current working state of the motor 121.

[0084] Please refer to Figure 6 Figure 6 This is the structural schematic diagram of the monitoring circuit provided by an embodiment of the present invention.

[0085] The monitoring circuit 140 includes: a voltage sampling chip 141 and an isolation chip. Two pins of the voltage sampling chip 141 are respectively connected to the positive and negative poles of the working component 120 for obtaining the working voltage of the working component 120.

[0086] The voltage sampling chip 141 is communicatively connected to the isolation chip, and the isolation chip is communicatively connected to the controller 100. The voltage sampling chip 141 sends the working voltage of the working component 120 to the controller 100 through the isolation chip.

[0087] The specific monitoring method is, taking the working state of the moving part 122 controlled by the second motor 1212 as an example:​

[0088] When it is monitored that the voltage at the positive terminal of the power supply of the second motor 1212 is the supply voltage value and the voltage at the negative terminal is 0V, the second motor 1212 is performing an extending movement. When it is monitored that the voltage at the negative terminal of the power supply of the second motor 1212 is the supply voltage value and the voltage at the positive terminal is 0V, the second motor 1212 is performing a retracting movement.

[0089] When it is monitored that the voltages at both ends of the second motor 1212 are all the supply voltage values, the second motor 1212 completes the extending movement. When it is monitored that the voltages at both ends of the second motor 1212 are all 0V, the second motor 1212 completes the retracting movement.

[0090] When it is monitored that the voltage difference between the power supply terminals of two or more motors 121 is about the supply voltage value, it indicates that two motors 121 are working while being energized, and thus a fault occurs in the control of the motors 121.

[0091] Please refer to Figure 7 , Figure 7 a control device provided by an embodiment of the present invention, comprising: a load 150 and the above control circuit.

[0092] The load 150 is connected to the moving part 122, and the moving part 122 drives the load 150 to move.

[0093] Correspondingly, the load 150 can be an electric door, a moving table, but this embodiment is not limited to these two scenarios, and can also be other mechanical components that are automatically opened in sequence, then automatically closed in sequence, or move in sequence according to a sequence, and then return to the original state in reverse order.

[0094] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A control circuit, characterized in that, Comprising: A controller, n control circuits, and n working components, where n is an integer greater than 0; The controller is electrically connected to all n control circuits, and the n control circuits are electrically connected to the n working components in one-to-one correspondence; Each of the working components includes: a motor and a moving component, and the motor is electrically connected to the moving component; The control circuit is configured to determine the target current direction input to both poles of the motor according to the control signal of the controller, and the motor is configured to drive the moving component to move according to the target current direction; The control circuit includes: two limit switches, the limit switches are electrically connected to the motor and are placed at preset positions; the two limit switches are respectively: a start switch and an end switch; The control circuit further includes: a relay, the relay is connected in parallel with the motor, and the control signal input terminal of the relay is connected to the controller; The normally open contact of the relay is connected to the first power supply terminal through the end switch of the previous control circuit, and the first power supply terminal is used to connect to the positive terminal of the DC power supply; the normally closed contact of the relay is connected to the second power supply terminal through the start switch of the next control circuit, and the second power supply terminal is used to connect to the negative terminal of the DC power supply.

2. The control circuit according to claim 1, wherein The moving component is a telescopic component, and the motor drives the telescopic component to extend or contract according to the target current direction.

3. The control circuit according to claim 2, characterized in that, When the telescopic component moves within a preset range of the preset position, it touches the limit switch to update the state.

4. The control circuit according to claim 3, wherein The preset positions include: the maximum position where the telescopic component contracts, and / or the maximum position where the telescopic component extends, and any position between the maximum position where the telescopic component contracts and the maximum position where the telescopic component extends.

5. The control circuit according to claim 1, characterized in that, Further comprising: A protection circuit; One end of the protection circuit is electrically connected to the controller, and the other end is electrically connected to the working component; The protection circuit is configured to obtain the current input to the working component and determine whether to cut off the circuit according to the current input to the working component.

6. The control circuit according to claim 5, characterized in that, The protection circuit includes: an overcurrent protection switch, a monitoring chip, and an overcurrent protection relay; One end of the overcurrent protection switch is connected to the working component, and the other end is connected to the power supply; one end of the monitoring chip is connected to the controller, and the other end is connected to one end of the overcurrent protection relay, and the other end of the overcurrent protection relay is connected to the working component; The monitoring chip is configured to obtain the current input to the working component and control the overcurrent protection relay to disconnect or close according to the current input to the working component.

7. The control circuit according to any one of claims 5, characterized in that Further comprising: A monitoring circuit; one end of the monitoring circuit is connected to the controller, and the other end is connected to the working component; The monitoring circuit is configured to monitor the motion state information of the moving component in the working component and send the motion state information to the controller.

8. The control circuit according to claim 7, characterized in that The monitoring circuit includes: a voltage sampling chip and an isolation chip; Two pins of the voltage sampling chip are respectively connected to the positive and negative poles of the working component to obtain the working voltage of the working component; The voltage sampling chip is communicatively connected to the isolation chip, and the isolation chip is communicatively connected to the controller; The voltage sampling chip sends the working voltage of the working component to the controller through the isolation chip.

9. A control device, characterized in that, Comprising: A load and the control circuit according to any one of claims 1-8; The load is connected to the moving component, and the moving component drives the load to move.

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