An electrically powered window covering control circuit

Abstract

The utility model relates to an electric curtain control circuit, electric curtain control circuit includes: main control module, first current sampling subcircuit, second current sampling subcircuit, first motor drive subcircuit, second motor drive subcircuit, first current sampling subcircuit is connected with first motor and main control module respectively, is used for gathering the current on first motor, and will amplify the current transmission to main control module, second current sampling subcircuit is connected with second motor and main control module respectively, is used for gathering the current on second motor, and will amplify the current transmission to main control module, first motor drive subcircuit is connected with first motor and main control module respectively, second motor drive subcircuit is connected with second motor and main control module respectively, main control module is used for generating motor control signal according to the current on the first motor and the current on the second motor of gathering, the control of two motors is realized with a power panel, reduces a power panel.

Description

Technical Field

[0001] This utility model relates to the field of electric curtain technology, and in particular to an electric curtain control circuit. Background Technology

[0002] As an important component of modern smart homes, motorized curtains are widely used due to their convenience. A typical motorized curtain system usually consists of two independently operating tracks: one for controlling the blackout curtains (hereinafter referred to as "curtains") and the other for controlling the sheer curtains. To achieve independent opening and closing of the curtains and sheer curtains, existing technologies generally equip each track with an independent drive system, which includes a drive motor and a power circuit board (hereinafter referred to as "power board") that supplies power and controls its operation.

[0003] This "one track, one machine, one board" design presents a significant cost and resource issue. The combined current draw for both curtains and sheer curtains during operation is approximately 1.5A. However, the draw will far exceed 1.5A when both tracks are running at their rated torque simultaneously, and may approach 4A when both tracks encounter resistance at their travel points. Therefore, existing designs must employ two independently powered boards to drive two separate motors.

[0004] However, in real-world usage scenarios, situations where curtains and sheers need to operate completely synchronously (i.e., start and stop simultaneously) are not the norm. More often, user actions are sequential, such as opening the sheer curtain first and then the main curtain, or vice versa. But existing systems, in order to meet the occasional need for synchronous operation, must have two complete power circuits readily available in the hardware. This results in one power board being idle during the vast majority of asynchronous operation times, leading to a waste of hardware resources. Utility Model Content

[0005] In view of this, it is necessary to provide an electric curtain control circuit, which includes: a main control module, a first current sampling sub-circuit, a second current sampling sub-circuit, a first motor drive sub-circuit, and a second motor drive sub-circuit; The first current sampling sub-circuit is connected to the first motor and the main control module respectively, and is used to collect the current on the first motor and transmit the amplified current to the main control module; The second current sampling sub-circuit is connected to the second motor and the main control module respectively, and is used to collect the current on the second motor and transmit the amplified current to the main control module; The first motor drive sub-circuit is connected to the first motor and the main control module respectively, and is used to receive the first motor control signal from the main control module and control the first motor to move according to the first motor control signal; The second motor drive sub-circuit is connected to the second motor and the main control module respectively, and is used to receive the second motor control signal from the main control module and control the movement of the second motor according to the second motor control signal; The main control module is used to generate control signals for the first motor and the second motor respectively based on the current collected from the first motor and the second motor.

[0006] In one embodiment, the electric curtain control circuit further includes a power module; the power module is connected to the main control module and is used to supply power to the main control module.

[0007] In one embodiment, the first current sampling sub-circuit includes resistors R1, R5, and R7, capacitors C1 and C2, and a first operational amplifier. One end of resistor R7 is connected to the first motor drive circuit, and the other end of resistor R7 is connected to the positive input terminal of the first operational amplifier. One end of capacitor C2 is connected to the positive input terminal of the first operational amplifier, and the other end of capacitor C2 is grounded. One end of resistor R1 is connected to the negative input terminal of the first operational amplifier, and the other end of resistor R1 is grounded. The output terminal of the first operational amplifier is connected to one end of resistor R5, and the other end of resistor R5 is connected to the main control module. One end of capacitor C1 is connected to the other end of resistor R5, and the other end of capacitor C1 is grounded.

[0008] In one embodiment, the first current sampling sub-circuit further includes a capacitor C3, one end of which is connected to the positive input terminal of the first operational amplifier, and the other end of which is grounded.

[0009] In one embodiment, the first current sampling sub-circuit further includes a resistor R2, one end of which is connected to the negative input terminal of the first operational amplifier, and the other end of which is connected to the output terminal of the first operational amplifier.

[0010] In one embodiment, the second current sampling sub-circuit includes resistors R3, R6, and R8, capacitors C4 and C5, and a second operational amplifier. One end of resistor R8 is connected to the second motor drive circuit, and the other end of resistor R8 is connected to the positive input terminal of the second operational amplifier. One end of capacitor C5 is connected to the positive input terminal of the second operational amplifier, and the other end of capacitor C5 is grounded. One end of resistor R3 is connected to the negative input terminal of the second operational amplifier, and the other end of resistor R3 is grounded. The output terminal of the second operational amplifier is connected to one end of resistor R6, and the other end of resistor R6 is connected to the main control module. One end of capacitor C4 is connected to the other end of resistor R6, and the other end of capacitor C4 is grounded.

[0011] In one embodiment, the second current sampling sub-circuit further includes a capacitor C6, one end of which is connected to the positive input terminal of the second operational amplifier, and the other end of which is grounded.

[0012] In one embodiment, the second current sampling sub-circuit further includes a resistor R4, one end of which is connected to the negative input terminal of the second operational amplifier, and the other end of which is connected to the output terminal of the second operational amplifier.

[0013] In one embodiment, the first motor drive sub-circuit includes resistors R9, R10, R11, R12, and R13, inductors L1 and L2, capacitors C7 and C8, a transient voltage suppression diode (TVS1), and a first motor drive chip. The first motor drive chip has eight pins. One end of resistor R9 is connected to the main control module, and the other end of resistor R9 is connected to a second pin of the first motor drive chip. One end of resistor R11 is connected to the main control module, and the other end of resistor R11 is connected to a third pin of the first motor drive chip. A fourth pin of the first motor drive chip is connected to one end of resistor R12, and the other end of resistor R12 is connected to a reference voltage. One end of resistor R13 is connected to the fourth pin of the first motor drive chip, and the other end of resistor R13 is grounded. One end of capacitor C7 is connected to a reference voltage, and the other end of capacitor C7 is grounded. One end of inductor L1 is connected to the eighth pin of the first motor driver chip, and the other end of inductor L1 is connected to the first motor. One end of inductor L2 is connected to the sixth pin of the first motor driver chip, and the other end of inductor L2 is connected to the first motor. The seventh pin of the first motor driver chip is connected to the first current sampling sub-circuit. One end of resistor R10 is connected to the seventh pin of the first motor driver chip, and the other end of resistor R10 is grounded. One end of capacitor C8 is connected to the sixth pin of the first motor driver chip, and the other end of capacitor C8 is grounded. One end of transient voltage suppression diode TVS1 is connected to the other end of inductor L1, and the other end of transient voltage suppression diode TVS1 is connected to the other end of inductor L2.

[0014] In one embodiment, the second motor drive sub-circuit includes resistors R14, R15, R16, R17, and R18, inductors L3 and L4, capacitors C9 and C10, a transient voltage suppression diode (TVS2), and a second motor drive chip. The second motor drive chip has eight pins. One end of resistor R14 is connected to the main control module, and the other end of resistor R14 is connected to a second pin of the second motor drive chip. One end of resistor R16 is connected to the main control module, and the other end of resistor R16 is connected to a third pin of the second motor drive chip. A fourth pin of the second motor drive chip is connected to one end of resistor R17, and the other end of resistor R17 is connected to a reference voltage. One end of resistor R18 is connected to the fourth pin of the second motor drive chip, and the other end of resistor R18 is connected to... One end of capacitor C9 is connected to the reference voltage, and the other end of capacitor C9 is grounded. One end of inductor L3 is connected to the eighth pin of the second motor driver chip, and the other end of inductor L3 is connected to the second motor. One end of inductor L4 is connected to the sixth pin of the second motor driver chip, and the other end of inductor L4 is connected to the second motor. The seventh pin of the second motor driver chip is connected to the second current sampling sub-circuit. One end of resistor R15 is connected to the seventh pin of the second motor driver chip, and the other end of R15 is grounded. One end of capacitor C10 is connected to the sixth pin of the second motor driver chip, and the other end of capacitor C10 is grounded. One end of transient voltage suppression diode TVS2 is connected to the other end of inductor L3, and the other end of transient voltage suppression diode TVS2 is connected to the other end of inductor L4.

[0015] This utility model provides a control circuit for electric curtains. A first current sampling sub-circuit and a second current sampling sub-circuit respectively filter and amplify the currents of the first and second motors before transmitting them to the main control module. The main control module compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current, the main control module controls one motor to run while the other motor stops, achieving time-sharing control of the two tracks. This allows control of both motors using a single power board, reducing the need for a separate power board and lowering operating costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an electric curtain control circuit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of another electric curtain control circuit according to an embodiment of the present invention; Figure 3This is a schematic diagram of a first current sampling sub-circuit according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a second current sampling sub-circuit according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a first motor drive sub-circuit according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a second motor drive sub-circuit according to an embodiment of the present invention.

[0017] Reference numerals: 100, main control module; 200, first current sampling sub-circuit; 300, second current sampling sub-circuit; 400, first motor drive sub-circuit; 500, second motor drive sub-circuit; 600, power supply module. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that when a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intervening component.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] 100. Main control module 100; 200. First current sampling sub-circuit 200; 300. Second current sampling sub-circuit 300; 400. First motor drive sub-circuit 400; 500. Second motor drive sub-circuit 500; 600. Power supply module 600.

[0022] Please see Figure 1This utility model provides an electric curtain control circuit, which includes: a main control module 100, a first current sampling sub-circuit 200, a second current sampling sub-circuit 300, a first motor drive sub-circuit 400, and a second motor drive sub-circuit 500. The first current sampling sub-circuit 200 is connected to the first motor and the main control module 100 respectively, and is used to collect the current on the first motor and transmit the amplified current to the main control module 100; the second current sampling sub-circuit 300 is connected to the second motor and the main control module 100 respectively, and is used to collect the current on the second motor and transmit the amplified current to the main control module 100; the first motor drive sub-circuit 400 is connected to the first motor and the main control module 100 respectively, and is used to receive the first motor control signal from the main control module 100 and control the movement of the first motor according to the first motor control signal; the second motor drive sub-circuit 500 is connected to the second motor and the main control module 100 respectively, and is used to receive the second motor control signal from the main control module 100 and control the movement of the second motor according to the second motor control signal; the main control module 100 is used to generate the first motor control signal and the second motor control signal respectively based on the collected current on the first motor and the current on the second motor.

[0023] The first current sampling sub-circuit 200 and the second current sampling sub-circuit 300 respectively filter and amplify the currents of the first and second motors before transmitting them to the main control module 100. The main control module 100 compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current (e.g., 1.5A), the main control module 100 will control one of the motors to run while the other motor stops running, realizing time-sharing control of the two tracks. This allows control of both motors to be achieved with a single power supply board, reducing the need for a separate power supply board and lowering operating costs.

[0024] refer to Figure 2This utility model provides another electric curtain control circuit, which includes: a main control module 100, a power supply module 600, a first current sampling sub-circuit 200, a second current sampling sub-circuit 300, a first motor drive sub-circuit 400, and a second motor drive sub-circuit 500. The first current sampling sub-circuit 200 is connected to the first motor and the main control module 100 respectively, and is used to collect the current on the first motor and transmit the amplified current to the main control module 100; the second current sampling sub-circuit 300 is connected to the second motor and the main control module 100 respectively, and is used to collect the current on the second motor and transmit the amplified current to the main control module 100; the first motor drive sub-circuit 400 is connected to the first motor and the main control module 100 respectively, and is used to receive the first motor control signal from the main control module 100 and control the movement of the first motor according to the first motor control signal; the second motor drive sub-circuit 500 is connected to the second motor and the main control module 100 respectively, and is used to receive the second motor control signal from the main control module 100 and control the movement of the second motor according to the second motor control signal; the main control module 100 is used to generate the first motor control signal and the second motor control signal respectively based on the collected current on the first motor and the second motor; the power supply module 600 is connected to the main control module 100 and is used to supply power to the main control module 100.

[0025] The first current sampling sub-circuit 200 and the second current sampling sub-circuit 300 respectively filter and amplify the currents of the first and second motors before transmitting them to the main control module 100. The main control module 100 compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current, the main control module 100 will control one of the motors to run while the other motor stops running, realizing time-sharing control of the two tracks. This allows control of both motors to be achieved with a single power board, reducing the need for a separate power board and lowering operating costs.

[0026] refer to Figure 3The first current sampling sub-circuit 200 includes resistors R1, R5, and R7, capacitors C1 and C2, and a first operational amplifier. One end of resistor R7 is connected to the first motor drive circuit, and the other end of resistor R7 is connected to the positive input terminal of the first operational amplifier. One end of capacitor C2 is connected to the positive input terminal of the first operational amplifier, and the other end of capacitor C2 is grounded. One end of resistor R1 is connected to the negative input terminal of the first operational amplifier, and the other end of resistor R1 is grounded. The output terminal of the first operational amplifier is connected to one end of resistor R5, and the other end of resistor R5 is connected to the main control module 100. One end of capacitor C1 is connected to the other end of resistor R5, and the other end of capacitor C1 is grounded. The first current sampling sub-circuit 200 also includes capacitor C3, one end of which is connected to the positive input terminal of the first operational amplifier, and the other end of capacitor C3 is grounded. The first current sampling sub-circuit 200 also includes resistor R2, one end of which is connected to the negative input terminal of the first operational amplifier, and the other end of resistor R2 is connected to the output terminal of the first operational amplifier. Point I_AD1 is connected to the main control module 100, meaning the other end of resistor R5 is connected to the main control module 100. This connection is used to filter and amplify the current of the first motor acquired by the first current sampling sub-circuit 200 through point FORCE1 before transmitting it to the main control module 100. The main control module 100 compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current, the main control module 100 will control one motor to run while the other motor stops, achieving time-sharing control of the two tracks. This allows control of both motors using a single power board, reducing the need for a separate power board and lowering operating costs. Resistors R1, R2, R5, and R7 can be 2KΩ, 15KΩ, 2KΩ, and 2KΩ respectively. The accuracy of resistors R1 and R2 can be 1%, and their package type can be 0603. The accuracy of resistors R5 and R7 can be 5%, and their package type can be 0402. Capacitor C1 can be a 100nF capacitor with a 0402 package and a rated voltage of 50V; capacitor C2 can be a 100nF capacitor with a 0402 package and a rated voltage of 50V; capacitor C3 can be a 1uF capacitor with a 0603 package and a rated voltage of 16V. The first operational amplifier U4B can be an LM358D.

[0027] refer to Figure 4The second current sampling sub-circuit 300 includes resistors R3, R6, and R8, capacitors C4 and C5, and a second operational amplifier. One end of resistor R8 is connected to the second motor drive circuit, and the other end of resistor R8 is connected to the positive input terminal of the second operational amplifier. One end of capacitor C5 is connected to the positive input terminal of the second operational amplifier, and the other end of capacitor C5 is grounded. One end of resistor R3 is connected to the negative input terminal of the second operational amplifier, and the other end of resistor R3 is grounded. The output terminal of the second operational amplifier is connected to one end of resistor R6, and the other end of resistor R6 is connected to the main control module 100. One end of capacitor C4 is connected to the other end of resistor R6, and the other end of capacitor C4 is grounded. The second current sampling sub-circuit 300 also includes capacitor C6, one end of which is connected to the positive input terminal of the second operational amplifier, and the other end of capacitor C6 is grounded. The second current sampling sub-circuit 300 also includes resistor R4, one end of which is connected to the negative input terminal of the second operational amplifier, and the other end of resistor R4 is connected to the output terminal of the second operational amplifier. Point I_AD2 is connected to the main control module 100, meaning the other end of resistor R6 is connected to the main control module 100. This connection is used to filter and amplify the current of the second motor collected by the second current sampling sub-circuit 300 through point FORCE2 before transmitting it to the main control module 100. The main control module 100 compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current, the main control module 100 will control one motor to run while the other motor stops, achieving time-sharing control of the two tracks. This allows control of both motors using a single power board, reducing the need for a separate power board and lowering operating costs. Resistors R3 and R4 can have a precision of 1% and are packaged in 0603 stainless steel. Resistors R6 and R8 can have a precision of 5% and are packaged in 0402 stainless steel. Capacitor C4 can be a 100nF capacitor with a 0402 package and a rated voltage of 50V. Capacitor C5 can also be a 100nF capacitor with a 0402 package and a rated voltage of 50V. Capacitor C6 can be a 1uF capacitor with a 0603 package and a rated voltage of 16V. The second operational amplifier U1B can be an LM358D.

[0028] The first current sampling sub-circuit 200 and the second current sampling sub-circuit 300 respectively filter and amplify the currents of the first and second motors before transmitting them to the main control module 100. The main control module 100 compares the sum of the currents of the first and second motors with the rated current. When the sum of the currents of the first and second motors is greater than or equal to the rated current, the main control module 100 controls one motor to run while the other motor stops, achieving time-sharing control of the two tracks. This allows control of both motors using a single power board, reducing the need for a separate power board and lowering operating costs. This embodiment requires only one power board to drive both tracks. By accurately sampling the currents of the two motors, the total current of the two tracks is always kept below the rated current, and time-sharing control of the two tracks is achieved, reducing the need for a separate power board and lowering operating costs.

[0029] refer to Figure 5 The first motor drive sub-circuit 400 includes resistors R9, R10, R11, R12, and R13, inductors L1 and L2, capacitors C7 and C8, a transient voltage suppression diode (TVS1), and a first motor drive chip Q3. The first motor drive chip Q3 has 8 pins, namely... Figure 5 Pins 1 to 8 of the first motor driver chip Q3 are connected to ground, and pin 9 is grounded. One end of resistor R9 is connected to the main control module 100, and the other end of resistor R9 is connected to the second pin of the first motor driver chip Q3. One end of resistor R11 is connected to the main control module 100, and the other end of resistor R11 is connected to the third pin of the first motor driver chip Q3. The fourth pin of the first motor driver chip Q3 is connected to one end of resistor R12, and the other end of resistor R12 is connected to the reference voltage. One end of resistor R13 is connected to the fourth pin of the first motor driver chip Q3, and the other end of resistor R13 is grounded. One end of capacitor C7 is connected to the reference voltage, and the other end of capacitor C7 is grounded. One end of inductor L1 is connected to the first motor driver chip Q3. Pin 8 of the motor driver chip Q3 is connected to the first motor. The other end of inductor L1 is connected to the first motor. One end of inductor L2 is connected to pin 6 of the first motor driver chip Q3, and the other end of inductor L2 is connected to the first motor. Pin 7 of the first motor driver chip Q3 is connected to the first current sampling sub-circuit 200. One end of resistor R10 is connected to pin 7 of the first motor driver chip Q3, and the other end of resistor R10 is grounded. One end of capacitor C8 is connected to pin 6 of the first motor driver chip Q3, and the other end of capacitor C8 is grounded. One end of transient voltage suppression diode TVS1 is connected to the other end of inductor L1, and the other end of transient voltage suppression diode TVS1 is connected to the other end of inductor L2. Pin 1 of the first motor driver chip Q3 is grounded, and pin 5 is connected to a 24V voltage. The first motor driver chip Q3 can be an AM4959S chip. Figure 5Pins 1 to 8 of the first motor driver chip Q3 correspond to pins 1 to 8 in this embodiment, respectively. Pin 5 of the first motor driver chip Q3 is connected to a 24V voltage. Pin 7 of the first motor driver chip Q3 is the FORCE1 point, which is connected to the FORCE1 point of the first current sampling sub-circuit 200. That is, pin 7 of the first motor driver chip Q3 is connected to one end of resistor R7. Resistor R13 can be left uninstalled or unsoldered, reserving a position for subsequent circuit performance adjustments. It can be used to set the internal current limiting point of the driver chip. If a parameter needs to be changed during testing, the resistor can be directly soldered on without redesigning the circuit board. Resistor R9 can be 10Ω, resistor R10 can be a 0.1Ω resistor with a 2512 package and 1% accuracy, resistor R11 can be 10Ω, and resistor R12 can be 1KΩ. Capacitor C7 can be a 100nF capacitor with a 0402 package and a rated voltage of 50V. Capacitor C8 can be a 100nF capacitor with a 0603 package and a rated voltage of 50 volts. Inductors L1 and L2 can be 3.3uH. PWM1 and PWM2 are connected to the main control module 100 to control the rotation or movement of the first motor MOTOR1. Inductors L1 and L2 are connected to the positive and negative terminals of the first motor MOTOR1, respectively.

[0030] refer to Figure 6 The second motor drive sub-circuit 500 includes resistors R14, R15, R16, R17, and R18; inductors L3 and L4; capacitors C9 and C10; a transient voltage suppression diode (TVS2); and a second motor drive chip Q4. The second motor drive chip Q4 has 8 pins, namely... Figure 6Pins 1 to 8 of the second motor driver chip Q4 are connected to ground, and pin 9 is grounded. One end of resistor R14 is connected to the main control module 100, and the other end of resistor R14 is connected to the second pin of the second motor driver chip Q4. One end of resistor R16 is connected to the main control module 100, and the other end of resistor R16 is connected to the third pin of the second motor driver chip Q4. The fourth pin of the second motor driver chip Q4 is connected to one end of resistor R17, and the other end of resistor R17 is connected to the reference voltage. One end of resistor R18 is connected to the fourth pin of the second motor driver chip Q4, and the other end of resistor R18 is grounded. One end of capacitor C9 is connected to the reference voltage, and the other end of capacitor C9 is grounded. One end of inductor L3 is connected to the second... Pin 8 of the motor driver chip Q4 is connected to the second motor, the other end of inductor L3 is connected to the second motor, one end of inductor L4 is connected to pin 6 of the second motor driver chip Q4, and the other end of inductor L4 is connected to the second motor. Pin 7 of the second motor driver chip Q4 is connected to the second current sampling sub-circuit 300. One end of resistor R15 is connected to pin 7 of the second motor driver chip Q4, and the other end of R15 is grounded. One end of capacitor C10 is connected to pin 6 of the second motor driver chip Q4, and the other end of capacitor C10 is grounded. One end of transient voltage suppression diode TVS2 is connected to the other end of inductor L3, and the other end of transient voltage suppression diode TVS2 is connected to the other end of inductor L4. Pin 1 of the second motor driver chip Q4 is grounded, and pin 5 is connected to a 24V voltage. The second motor driver chip Q4 can be an AM4959S chip. Figure 5 Pins 1 to 8 of the second motor driver chip Q4 correspond to pins 1 to 8 in this embodiment, respectively. Pin 5 of the second motor driver chip Q4 is connected to a 24V voltage. Pin 7 of the second motor driver chip Q4 is the FORCE2 point, which is connected to the FORCE2 point of the second current sampling sub-circuit 300. That is, pin 7 of the second motor driver chip Q4 is connected to one end of resistor R8. Resistor R18 can be left uninstalled or unsoldered, reserving a position for subsequent circuit performance adjustments. If a parameter change is required during testing, the resistor can be directly soldered on without redesigning the circuit board. Resistor R14 can be 10Ω, resistor R15 can be a 0.1Ω resistor with a 2512 package and 1% accuracy, resistor R16 can be 10Ω, and resistor R17 can be 1KΩ. Capacitor C9 can be a 100nF capacitor with a 0402 package and a rated voltage of 50V. Capacitor C10 can be a 100nF capacitor with a 0603 package and a rated voltage of 50 volts. Inductors L3 and L4 can be 3.3uH. PWM3 and PWM4 are connected to the main control module 100 to control the rotation or movement of the second motor MOTOR1. Inductors L3 and L4 are connected to the positive and negative terminals of the second motor MOTOR1, respectively.

[0031] The technical features of the above-described embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A control circuit for an electric curtain, characterized in that, The electric curtain control circuit includes: a main control module, a first current sampling sub-circuit, a second current sampling sub-circuit, a first motor drive sub-circuit, and a second motor drive sub-circuit; The first current sampling sub-circuit is connected to the first motor and the main control module respectively, and is used to collect the current on the first motor and transmit the amplified current to the main control module; The second current sampling sub-circuit is connected to the second motor and the main control module respectively, and is used to collect the current on the second motor and transmit the amplified current to the main control module; The first motor drive sub-circuit is connected to the first motor and the main control module respectively, and is used to receive the first motor control signal from the main control module and control the first motor to move according to the first motor control signal; The second motor drive sub-circuit is connected to the second motor and the main control module respectively, and is used to receive the second motor control signal from the main control module and control the movement of the second motor according to the second motor control signal; The main control module is used to generate control signals for the first motor and the second motor respectively based on the current collected from the first motor and the second motor.

2. The electric curtain control circuit according to claim 1, characterized in that, The electric curtain control circuit further includes a power module; the power module is connected to the main control module and is used to supply power to the main control module.

3. The electric curtain control circuit according to claim 1, characterized in that, The first current sampling sub-circuit includes resistors R1, R5, and R7, capacitors C1 and C2, and a first operational amplifier. One end of resistor R7 is connected to the first motor drive circuit, and the other end of resistor R7 is connected to the positive input terminal of the first operational amplifier. One end of capacitor C2 is connected to the positive input terminal of the first operational amplifier, and the other end of capacitor C2 is grounded. One end of resistor R1 is connected to the negative input terminal of the first operational amplifier, and the other end of resistor R1 is grounded. The output terminal of the first operational amplifier is connected to one end of resistor R5, and the other end of resistor R5 is connected to the main control module. One end of capacitor C1 is connected to the other end of resistor R5, and the other end of capacitor C1 is grounded.

4. The electric curtain control circuit according to claim 3, characterized in that, The first current sampling sub-circuit also includes a capacitor C3, one end of which is connected to the positive input terminal of the first operational amplifier, and the other end of which is grounded.

5. The electric curtain control circuit according to claim 3, characterized in that, The first current sampling sub-circuit further includes a resistor R2, one end of which is connected to the negative input terminal of the first operational amplifier, and the other end of which is connected to the output terminal of the first operational amplifier.

6. The electric curtain control circuit according to claim 1, characterized in that, The second current sampling sub-circuit includes resistors R3, R6, and R8, capacitors C4 and C5, and a second operational amplifier. One end of resistor R8 is connected to the second motor drive circuit, and the other end of resistor R8 is connected to the positive input terminal of the second operational amplifier. One end of capacitor C5 is connected to the positive input terminal of the second operational amplifier, and the other end of capacitor C5 is grounded. One end of resistor R3 is connected to the negative input terminal of the second operational amplifier, and the other end of resistor R3 is grounded. The output terminal of the second operational amplifier is connected to one end of resistor R6, and the other end of resistor R6 is connected to the main control module. One end of capacitor C4 is connected to the other end of resistor R6, and the other end of capacitor C4 is grounded.

7. The electric curtain control circuit according to claim 6, characterized in that, The second current sampling sub-circuit also includes a capacitor C6, one end of which is connected to the positive input terminal of the second operational amplifier, and the other end of which is grounded.

8. The electric curtain control circuit according to claim 6, characterized in that, The second current sampling sub-circuit also includes a resistor R4, one end of which is connected to the negative input terminal of the second operational amplifier, and the other end of which is connected to the output terminal of the second operational amplifier.

9. The electric curtain control circuit according to claim 1, characterized in that, The first motor drive sub-circuit includes resistors R9, R10, R11, R12, and R13, inductors L1 and L2, capacitors C7 and C8, a transient voltage suppression diode (TVS1), and a first motor drive chip. The first motor drive chip has eight pins. One end of resistor R9 is connected to the main control module, and the other end of resistor R9 is connected to the second pin of the first motor drive chip. One end of resistor R11 is connected to the main control module, and the other end of resistor R11 is connected to the third pin of the first motor drive chip. The fourth pin of the first motor drive chip is connected to one end of resistor R12, and the other end of resistor R12 is connected to a reference voltage. One end of resistor R13 is connected to the fourth pin of the first motor drive chip, and the other end of resistor R13 is grounded. The capacitor C7... One end of capacitor C7 is connected to a reference voltage, and the other end of capacitor C7 is grounded. One end of inductor L1 is connected to the eighth pin of the first motor driver chip, and the other end of inductor L1 is connected to the first motor. One end of inductor L2 is connected to the sixth pin of the first motor driver chip, and the other end of inductor L2 is connected to the first motor. The seventh pin of the first motor driver chip is connected to the first current sampling sub-circuit. One end of resistor R10 is connected to the seventh pin of the first motor driver chip, and the other end of resistor R10 is grounded. One end of capacitor C8 is connected to the sixth pin of the first motor driver chip, and the other end of capacitor C8 is grounded. One end of transient voltage suppression diode TVS1 is connected to the other end of inductor L1, and the other end of transient voltage suppression diode TVS1 is connected to the other end of inductor L2.

10. The electric curtain control circuit according to claim 1, characterized in that, The second motor drive sub-circuit includes resistors R14, R15, R16, R17, and R18, inductors L3 and L4, capacitors C9 and C10, a transient voltage suppression diode (TVS2), and a second motor drive chip. The second motor drive chip has eight pins. One end of resistor R14 is connected to the main control module, and the other end of resistor R14 is connected to the second pin of the second motor drive chip. One end of resistor R16 is connected to the main control module, and the other end of resistor R16 is connected to the third pin of the second motor drive chip. The fourth pin of the second motor drive chip is connected to one end of resistor R17, and the other end of resistor R17 is connected to a reference voltage. One end of resistor R18 is connected to the fourth pin of the second motor drive chip, and the other end of resistor R18 is grounded. One end of capacitor C9 is connected to the reference voltage, and the other end of capacitor C9 is grounded. One end of inductor L3 is connected to the eighth pin of the second motor driver chip, and the other end of inductor L3 is connected to the second motor. One end of inductor L4 is connected to the sixth pin of the second motor driver chip, and the other end of inductor L4 is connected to the second motor. The seventh pin of the second motor driver chip is connected to the second current sampling sub-circuit. One end of resistor R15 is connected to the seventh pin of the second motor driver chip, and the other end of R15 is grounded. One end of capacitor C10 is connected to the sixth pin of the second motor driver chip, and the other end of capacitor C10 is grounded. One end of transient voltage suppression diode TVS2 is connected to the other end of inductor L3, and the other end of transient voltage suppression diode TVS2 is connected to the other end of inductor L4.

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