Integrated control system
By integrating zero-crossing detection and chopper signal drive into the control system, reliable cluster control of equipment in large venues is achieved, solving the problems of high cost and insufficient reliability in existing technologies, and providing a stable control scheme in complex electromagnetic environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN H&T INTELLIGENT CONTROL
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-12
AI Technical Summary
In large venues, existing technologies struggle to effectively and economically control clustered devices, especially in complex electromagnetic interference environments where IoT modules are costly and lack reliability.
An integrated control system is adopted, which uses first and second zero-crossing detection modules to detect the zero-crossing point of AC power supply, and drives the switching module through control signals and chopper signals to realize reliable cluster control of controlled equipment. It includes the combined use of first zero-crossing detection module, first control module, switching module, second zero-crossing detection module and second control module.
It achieves reliable cluster control of controlled devices, avoids electromagnetic interference, and has a low cost.
Smart Images
Figure CN224232117U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of integrated control technology, and in particular to an integrated control system. Background Technology
[0002] Currently, in some large venues (such as supermarkets, large warehouses, factories, and even large residences), a certain number of exhaust fans, ceiling fans, lighting and other equipment are often required. Since the distance between these devices can be several meters or even tens of meters, and there may be many obstructions (walls, goods, etc.) in between, it would be very time-consuming and labor-intensive to control them individually.
[0003] For the reasons mentioned above, in the current era of advanced Internet of Things (IoT), IoT modules such as Bluetooth, WiFi, and Zigbee can be used to control devices in clusters. However, this method is not only costly, but also highly dependent on wireless radio frequency signals. If complex electromagnetic interference occurs in the environment, it may malfunction and become uncontrollable. Utility Model Content
[0004] This application provides an integrated control system that can reliably perform cluster control of controlled devices at a low cost.
[0005] In a first aspect, embodiments of this application provide an integrated control system, comprising: a control device and K controlled devices, wherein K is an integer greater than or equal to 1; the control device comprises: a first zero-crossing detection module connected to an AC power supply, configured to output a first zero-crossing detection signal based on the AC power supply, wherein the first zero-crossing detection signal is at a first level when the AC power supply is greater than zero, and at a second level when the AC power supply is less than or equal to zero; a first control module connected to the first zero-crossing detection module, configured to output a control signal based on the first zero-crossing detection signal; and a switching module connected to the first control module and connected between the AC power supply and the controlled devices, configured to turn on or off in response to the control signal to output a chopping signal to the controlled devices, wherein the control signal controls the timing of the switching module's on and off based on the first zero-crossing detection signal. The timing of the zero-crossing detection signal switching from high level to low level or from low level to high level is determined; the controlled device includes: a second zero-crossing detection module connected to the switching module, used to output a second zero-crossing detection signal based on the chopping signal, wherein the second zero-crossing detection signal is at the first level when the AC power supply is greater than zero, and at the second level when the AC power supply is less than or equal to zero; a second control module and a load, the second control module being connected to both the second zero-crossing detection module and the load, the second control module being used to output a drive signal to the load based on the second zero-crossing detection signal and a preset correspondence, so as to drive the load to be in a working state corresponding to the second zero-crossing detection signal, wherein the preset correspondence is a pre-set correspondence between the second zero-crossing detection signal, the drive signal, and the working state.
[0006] In one or more embodiments, the switching module includes: a first switching transistor, a first end of which is connected to the first control module to input the control signal, a second end of which is connected to the second zero-crossing detection module, and a third end of which is connected to the live wire of the AC power supply; or, a relay, a first end of which is connected to the first control module to input the control signal, a second end of which is grounded, and one contact of a pair of normally open contacts of the relay is connected to the second zero-crossing detection module, and the other contact is connected to the live wire of the AC power supply.
[0007] In one or more embodiments, the first switching transistor is an NMOS transistor, with the gate of the NMOS transistor being the first terminal of the first switching transistor, the source of the NMOS transistor being the second terminal of the first switching transistor, and the drain of the NMOS transistor being the third terminal of the first switching transistor; or, the first switching transistor is an NPN transistor, with the base of the NPN transistor being the first terminal of the first switching transistor, the emitter of the NPN transistor being the second terminal of the first switching transistor, and the collector of the NPN transistor being the third terminal of the first switching transistor.
[0008] In one or more embodiments, the first zero-crossing detection module includes a first optocoupler, a first resistor, and a second switching transistor; the anode of the light emitter of the first optocoupler is connected to the live wire of the AC power supply, the cathode of the light emitter of the first optocoupler is connected to the neutral wire of the AC power supply, the first end of the light receiver of the first optocoupler is connected to the first end of the second switching transistor, the second end of the light receiver of the first optocoupler is grounded, the second end of the second switching transistor is connected to a first voltage, the third end of the second switching transistor is connected to the first end of the first resistor and the first control module respectively, and the second end of the first resistor is grounded.
[0009] In one or more embodiments, the first zero-crossing detection module further includes a second resistor, a third resistor, a fourth resistor, a first diode, a first capacitor, a second capacitor, and a third capacitor; the anode of the first diode is connected to the live wire of the AC power supply, the cathode of the first diode is connected to the first end of the second resistor, the second end of the second resistor is connected to the anode of the light emitter of the first optocoupler, the third resistor is connected between the neutral wire of the AC power supply and the cathode of the light emitter of the first optocoupler, the first capacitor is connected between the first voltage and the first end of the second switching transistor, the second capacitor is connected between the first end of the second switching transistor and ground, the fourth resistor is connected between the third end of the second switching transistor and the first control module, and the third capacitor is connected between the first control module and ground.
[0010] In one or more embodiments, the second switching transistor is a PNP transistor, the base of the PNP transistor is the first terminal of the second switching transistor, the emitter of the PNP transistor is the second terminal of the second switching transistor, and the collector of the PNP transistor is the third terminal of the second switching transistor.
[0011] In one or more embodiments, the second zero-crossing detection module includes a second optocoupler, a fifth resistor, and a third switch; the anode of the light emitter of the second optocoupler is connected to the switch module, the cathode of the light emitter of the second optocoupler is connected to the neutral line of the AC power supply, the first end of the light receiver of the second optocoupler is connected to the first end of the third switch, the second end of the light receiver of the second optocoupler is grounded, the second end of the third switch is connected to a first voltage, the third end of the third switch is connected to the first end of the fifth resistor and the second control module, and the second end of the fifth resistor is grounded.
[0012] In one or more embodiments, the second zero-crossing detection module further includes a sixth resistor, a seventh resistor, an eighth resistor, a second diode, a fourth capacitor, a fifth capacitor, and a sixth capacitor; the anode of the second diode is connected to the switching module, the cathode of the second diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the anode of the light emitter of the second optocoupler, the seventh resistor is connected between the neutral line of the AC power supply and the cathode of the light emitter of the second optocoupler, the fourth capacitor is connected between the first voltage and the first end of the third switching transistor, the fifth capacitor is connected between the first end of the third switching transistor and ground, the eighth resistor is connected between the third end of the third switching transistor and the second control module, and the sixth capacitor is connected between the second control module and ground.
[0013] In one or more embodiments, the third switching transistor is a PNP transistor, the base of the PNP transistor is the first terminal of the third switching transistor, the emitter of the PNP transistor is the second terminal of the third switching transistor, and the collector of the PNP transistor is the third terminal of the third switching transistor.
[0014] In one or more embodiments, the control device further includes: a non-isolated power supply connected to both the AC power supply and the controlled device, for outputting a first DC power supply to the controlled device based on the AC power supply to power the controlled device, wherein the live wire or neutral wire of the AC power supply is connected to the positive terminal of the first DC power supply; or an isolated power supply connected to both the AC power supply and the controlled device, for outputting a second DC power supply to the controlled device based on the AC power supply to power the controlled device.
[0015] The beneficial effects of this application are as follows: The integrated control system of this application embodiment includes a control device and K controlled devices, where K is an integer greater than or equal to 1. The control device includes a first zero-crossing detection module, a first control module, and a switch module. The first zero-crossing detection module is used to output a first zero-crossing detection signal based on AC power, wherein the first zero-crossing detection signal is at a first level when the AC power is greater than zero, and at a second level when the AC power is less than or equal to zero; the first control module is used to output a control signal based on the first zero-crossing detection signal; the switch module is used to turn on or off in response to the control signal to output a chopping signal to the controlled devices, wherein the timing of the control signal controlling the switch module to turn on and off is determined according to the timing of the first zero-crossing detection signal switching from a high level to a low level or from a low level to a high level. The controlled device includes a second zero-crossing detection module, a second control module, and a load. The second zero-crossing detection module outputs a second zero-crossing detection signal based on a chopping signal. The second zero-crossing detection signal is at a first level when the AC power supply is greater than zero, and at a second level when the AC power supply is less than or equal to zero. The second control module outputs a drive signal to the load based on a preset correspondence between the second zero-crossing detection signal and the load, driving the load to operate in the state corresponding to the second zero-crossing detection signal. The preset correspondence is a pre-set relationship between the second zero-crossing detection signal, the drive signal, and the operating state. Through this process, K controlled devices can be controlled to operate in corresponding states, achieving cluster control of K controlled devices. This method is unaffected by electromagnetic interference, has high reliability, and is less costly than related technologies that use IoT modules. Attached Figure Description
[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are not intended to limit the embodiments, and elements having the same reference numerals in the drawings are designated as similar elements.
[0017] Figure 1 This is a schematic diagram of the composition of the integrated control system provided in the embodiments of this application;
[0018] Figure 2 This is a schematic diagram of the composition of the control device and the first controlled device provided in the embodiments of this application. Figure 1 ;
[0019] Figure 3 This is provided by the embodiments of this application. Figure 2 A schematic diagram of each signal in the block diagram shown;
[0020] Figure 4 This is a schematic diagram of the circuit structure of the switching module and the second zero-crossing detection module provided in the embodiments of this application;
[0021] Figure 5 This is a schematic diagram of the circuit structure of the first zero-crossing detection module provided in an embodiment of this application;
[0022] Figure 6 This is a schematic diagram of the composition of the control device and the first controlled device provided in the embodiments of this application. Figure 2 ;
[0023] Figure 7 This is a schematic diagram of the composition of the control device and the first controlled device provided in the embodiments of this application. Figure 3 . Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0025] It should be noted that when an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements between them.
[0026] Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0027] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the composition of the integrated control system provided in an embodiment of this application. Figure 1 As shown, the integrated control system 100 includes a control device 10 and K controlled devices, where K is an integer greater than or equal to 1. The K controlled devices include a first controlled device A1, a second controlled device A2, ..., and a Kth controlled device AK.
[0028] Control device 10 is connected to AC power supply 200, first controlled device A1, second controlled device A2, ..., Kth controlled device AK via control line S1 and power line S2, respectively. Control device 10 outputs control signals, such as start or stop signals, via control line S1, with a relatively low operating voltage; control device 10 provides the necessary power to the devices via power line S2, which is directly connected to AC power supply and supplies power to first controlled device A1, second controlled device A2, ..., Kth controlled device AK.
[0029] Since the specific control methods and processes of the first controlled device A1, the second controlled device A2, ..., the Kth controlled device AK are the same, the following explanation will only take the first controlled device A1 as an example.
[0030] In some embodiments, such as Figure 2 As shown, the control device 10 includes a first zero-crossing detection module 11, a first control module 12, and a switch module 13, and the first controlled device A1 includes a second zero-crossing detection module A1.1, a second control module A1.2, and a load A1.3.
[0031] The first zero-crossing detection module 11 is connected to the AC power supply 200, the first control module 12 is connected to the first zero-crossing detection module 11, the switch module 13 is connected to the first control module 12, the switch module 13 is connected between the AC power supply 200 and the first controlled device A1, the second zero-crossing detection module A1.1 is connected to the switch module 13, and the second control module A1.2 is connected to the second zero-crossing detection module A1.1 and the load A1.3 respectively.
[0032] Specifically, the first zero-crossing detection module 11 is used to output a first zero-crossing detection signal based on the AC power supply 200. When the AC power supply 200 is greater than zero, the first zero-crossing detection signal is at a first level; when the AC power supply 200 is less than or equal to zero, the first zero-crossing detection signal is at a second level. The first level and the second level are either high or low. When the first level is high, the second level is low; when the first level is low, the second level is high. The first control module 12 is used to output a control signal based on the first zero-crossing detection signal. The switch module 13 is used to turn on or off in response to the control signal to output a chopped signal to the first controlled device A1. The timing of the control signal controlling the switch module 13 to turn on or off is determined according to the timing of the first zero-crossing detection signal switching from high to low or from low to high. The second zero-crossing detection module A1.1 is used to output a second zero-crossing detection signal based on the chopped signal. When the AC power supply 200 is greater than zero, the second zero-crossing detection signal is at a first level; when the AC power supply 200 is less than or equal to zero, the second zero-crossing detection signal is at a second level. The second control module A1.2 is used to output a drive signal to the load A1.3 based on the second zero-crossing detection signal and the preset correspondence, so as to drive the load A1.3 to be in the working state corresponding to the second zero-crossing detection signal. The preset correspondence is a pre-set correspondence between the second zero-crossing detection signal, the drive signal and the working state.
[0033] by Figure 3 For example, in Figure 3In the diagram, the horizontal axis represents time, and the vertical axis, from top to bottom, represents: AC power supply 200, first zero-crossing detection signal S1, first chopper signal S2, first second zero-crossing detection signal S3, second chopper signal S4, and second second zero-crossing detection signal S5.
[0034] Specifically, this embodiment uses a first level as high and a second level as low as an example. Figure 3 As shown, from time T1 to time T2, the AC power supply 200 is greater than zero, and the first zero-crossing detection signal is high; from time T2 to time T3, the AC power supply 200 is less than or equal to zero, and the first zero-crossing detection signal is low... and so on, the first zero-crossing detection signal S1 can be obtained.
[0035] One implementation method for chopping the AC power supply 200 is shown in the first chopping signal S2. Specifically, at time T3 (the moment when the first zero-crossing detection signal switches from low to high level), the control switch module 13 is turned off, and the first chopping signal S2 remains zero. At time T4 (the moment when the first zero-crossing detection signal switches from high to low level), the control switch module 13 is turned on, and the first chopping signal S2 is the same as that of the AC power supply 200, thus obtaining the first chopping signal S2. Subsequently, the second zero-crossing detection module A1.1 obtains the first second zero-crossing detection signal S3 based on the first chopping signal S2. Specifically, from time T1 to time T2, the AC power supply 200 is greater than zero, and the first zero-crossing detection signal is high; from time T2 to time T5, the AC power supply 200 is less than or equal to zero, and the first zero-crossing detection signal is low... and so on, thus obtaining the first second zero-crossing detection signal S3. Subsequently, the second control module A1.2 outputs a first drive signal to the load A1.3 based on the correspondence between the first second zero-crossing detection signal S3, the drive signal (denoted as the first drive signal), and the operating state (denoted as the first operating state), thereby driving the load A1.3 to operate in the first operating state. For example, in a specific embodiment, the load A1.3 is a ceiling fan, and the first operating state corresponds to the fan blades rotating at a first speed. After the second zero-crossing detection module A1.1 in the ceiling fan receives the first chopping signal S2, it outputs a first second zero-crossing detection signal S3 to the second control module A1.2 in the ceiling fan based on the first chopping signal S2. After receiving the first second zero-crossing detection signal S3, the second control module A1.2 outputs a first drive signal to the motor in the ceiling fan, thereby driving the motor to rotate at the first speed, and thus the fan blades in the ceiling fan rotate at the first speed.
[0036] Another implementation method for chopping the AC power supply 200 is shown in the second chopping signal S4. Specifically, at time T3 (the moment when the first zero-crossing detection signal switches from low to high level), the control switch module 13 is turned off, and the first chopping signal S2 remains zero. At time T7 (the moment when the first zero-crossing detection signal switches from low to high level), the control switch module 13 is turned on, and the second chopping signal S4 is the same as that of the AC power supply 200, thus obtaining the second chopping signal S4. Subsequently, the second zero-crossing detection module A1.1 obtains the second second zero-crossing detection signal S5 based on the second chopping signal S4. Specifically, from time T1 to time T2, the AC power supply 200 is greater than zero, and the first zero-crossing detection signal is high; from time T2 to time T7, the AC power supply 200 is less than or equal to zero, and the first zero-crossing detection signal is low... and so on, to obtain the second second zero-crossing detection signal S5. Subsequently, the second control module A1.2 outputs a second drive signal to the load A1.3 based on the correspondence between the second zero-crossing detection signal S5, the drive signal (denoted as the second drive signal), and the operating state (denoted as the second operating state), thereby driving the load A1.3 to operate in the second operating state. For example, in a specific embodiment, the load A1.3 is a ceiling fan, and the second operating state corresponds to the fan blades rotating at a second speed (the second speed is different from the first speed). After the second zero-crossing detection module A1.1 in the ceiling fan receives the second chopping signal S4, it outputs a second zero-crossing detection signal S5 to the second control module A1.2 in the ceiling fan based on the second chopping signal S4. After receiving the second zero-crossing detection signal S5, the second control module A1.2 outputs a second drive signal to the motor in the ceiling fan, thereby driving the motor to rotate at the second speed, and thus the fan blades in the ceiling fan rotate at the second speed.
[0037] In summary, by chopping the AC power supply 200 in different ways, different chopping signals can be obtained, which can then control the first controlled device A1 to be in different operating states. Therefore, through the above process, K controlled devices can be controlled to be in corresponding operating states, thus achieving cluster control of K controlled devices. Furthermore, the above control process is not affected by electromagnetic interference, resulting in high reliability. In addition, compared to the use of IoT modules in related technologies, the cost is lower.
[0038] In some embodiments, such as Figure 4As shown, the switching module 13 includes a first switching transistor Q1. The first terminal of the first switching transistor Q1 is connected to the first control module 12 to input a control signal, the second terminal of the first switching transistor Q1 is connected to the second zero-crossing detection module A1.1, and the third terminal of the first switching transistor Q1 is connected to the live wire L of the AC power supply 200. When the first switching transistor Q1 is turned on, the switching module 13 is turned on; when the first switching transistor Q1 is turned off, the switching module 13 is turned off.
[0039] In this embodiment, the first switch Q1 is an NMOS transistor. The gate of the NMOS transistor is the first terminal of the first switch Q1, the source of the NMOS transistor is the second terminal of the first switch Q1, and the drain of the NMOS transistor is the third terminal of the first switch Q1.
[0040] In addition, the first switch Q1 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.
[0041] For example, in some embodiments, the first switch Q1 is an NPN transistor, the base of the NPN transistor is the first terminal of the first switch Q1, the emitter of the NPN transistor is the second terminal of the first switch Q1, and the collector of the NPN transistor is the third terminal of the first switch Q1.
[0042] For example, in some embodiments, the switch module 13 includes a relay. The first end of the relay coil is connected to the first control module 12 to input a control signal, the second end of the coil is grounded (GND), one contact of the relay's pair of normally open contacts is connected to the second zero-crossing detection module A1.1, and the other contact is connected to the live wire L of the AC power supply 200.
[0043] In some embodiments, the second zero-crossing detection module A1.1 includes a second optocoupler U2, a fifth resistor R5, and a third switch Q3.
[0044] In this configuration, the anode of the light emitter of the second optocoupler U2 is connected to the switch module 13, the cathode of the light emitter of the second optocoupler U2 is connected to the neutral line N of the AC power supply 200, the first end of the light receiver of the second optocoupler U2 is connected to the first end of the third switch transistor Q3, the second end of the light receiver of the second optocoupler U2 is grounded to GND, the second end of the third switch transistor Q3 is connected to the first voltage V1, the third end of the third switch transistor Q3 is connected to the first end of the fifth resistor R5 and the second control module A1.2 respectively, and the second end of the fifth resistor R5 is grounded to GND.
[0045] In some embodiments, the second zero-crossing detection module A1.1 further includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a second diode D2, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C.
[0046] Among them, the anode of the second diode D2 is connected to the switch module 13, the cathode of the second diode D2 is connected to the first end of the sixth resistor R6, the second end of the sixth resistor R6 is connected to the anode of the light emitter of the second optocoupler U2, the seventh resistor R7 is connected between the neutral line N of the AC power supply 200 and the cathode of the light emitter of the second optocoupler U2, the fourth capacitor C4 is connected between the first voltage V1 and the first end of the third switch Q3, the fifth capacitor C5 is connected between the first end of the third switch Q3 and ground GND, the eighth resistor R8 is connected between the third end of the third switch Q3 and the second control module A1.2, and the sixth capacitor C6 is connected between the second control module A1.2 and ground GND.
[0047] Specifically, the fifth resistor R5 is a pull-down resistor, and the sixth, seventh, and eighth resistors R6, R7, and R8 are current-limiting resistors. The fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 are filter capacitors.
[0048] When the first switch Q1 is turned on, if the AC power supply 200 is greater than zero, the emitter of the second optocoupler U2 is energized, the receiver of the second optocoupler U2 is turned on, the third switch Q3 is turned on, and the first voltage V1 is input to the second control module A1.2 through the third switch Q3, corresponding to a high level (i.e., the first level) input to the second control module A1.2; if the AC power supply 200 is less than or equal to zero, the emitter of the second optocoupler U2 is de-energized, the receiver of the second optocoupler U2 is turned off, the third switch Q3 is turned off, and the second control module A1.2 is grounded to GND through the eighth resistor R8 and the fifth resistor R5, corresponding to a low level (i.e., the second level) input to the second control module A1.2.
[0049] In this embodiment, the third switch Q3 is a PNP transistor. The base of the PNP transistor is the first terminal of the third switch Q3, the emitter of the PNP transistor is the second terminal of the third switch Q3, and the collector of the PNP transistor is the third terminal of the third switch Q3.
[0050] In addition, the third switch Q3 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.
[0051] In some embodiments, such as Figure 5As shown, the first zero-crossing detection module 11 includes a first optocoupler U1, a first resistor R1 and a second switch Q2.
[0052] In this configuration, the anode of the light emitter of the first optocoupler U1 is connected to the live wire L of the AC power supply 200, the cathode of the light emitter of the first optocoupler U1 is connected to the neutral wire N of the AC power supply 200, the first end of the light receiver of the first optocoupler U1 is connected to the first end of the second switch Q2, the second end of the light receiver of the first optocoupler U1 is grounded to GND, the second end of the second switch Q2 is connected to the first voltage V1, the third end of the second switch Q2 is connected to the first end of the first resistor R1 and the first control module 12, and the second end of the first resistor R1 is grounded to GND.
[0053] In some embodiments, the first zero-crossing detection module 11 further includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a first capacitor C1, a second capacitor C2, and a third capacitor C3.
[0054] In this configuration, the anode of the first diode D1 is connected to the live wire L of the AC power supply 200, the cathode of the first diode D1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the anode of the light emitter of the first optocoupler U1, the third resistor R3 is connected between the neutral wire N of the AC power supply 200 and the cathode of the light emitter of the first optocoupler U1, the first capacitor C1 is connected between the first voltage V1 and the first end of the second switch Q2, the second capacitor C2 is connected between the first end of the second switch Q2 and ground GND, the fourth resistor R4 is connected between the third end of the second switch Q2 and the first control module 12, and the third capacitor C3 is connected between the first control module 12 and ground GND.
[0055] Specifically, the first resistor R1 is a pull-down resistor, and the second resistor R2, the third resistor R3, and the fourth resistor R4 are current-limiting resistors. The first capacitor C1, the second capacitor C2, and the third capacitor C3 are filter capacitors.
[0056] When the AC power supply 200 is greater than zero, the emitter of the first optocoupler U1 is energized, the receiver of the first optocoupler U1 is turned on, the second switch Q2 is turned on, and the first voltage V1 is input to the first control module 12 through the second switch Q2, corresponding to a high level (i.e., the first level) input to the first control module 12; when the AC power supply 200 is less than or equal to zero, the emitter of the first optocoupler U1 is de-energized, the receiver of the first optocoupler U1 is turned off, the second switch Q2 is turned off, and the first control module 12 is grounded to GND through the fourth resistor R4 and the first resistor R1, corresponding to a low level (i.e., the second level) input to the first control module 12.
[0057] In this embodiment, the second switch Q2 is a PNP transistor. The base of the PNP transistor is the first terminal of the second switch Q2, the emitter of the PNP transistor is the second terminal of the second switch Q2, and the collector of the PNP transistor is the third terminal of the second switch Q2.
[0058] In addition, the second switch Q2 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field-effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.
[0059] In some embodiments, such as Figure 6 As shown, the control device 10 also includes a non-isolated power supply 14. The non-isolated power supply 14 is connected to both the AC power supply 200 and the first controlled device A1. The non-isolated power supply 14 is used to output a first DC power supply DC1 from the AC power supply 200 to the first controlled device A1 to supply power to the first controlled device A1. The live wire L or neutral wire N of the AC power supply 200 is connected to the positive terminal of the first DC power supply DC1. The specific circuit structure of the non-isolated power supply 14 is common knowledge in the art and will not be described in detail here.
[0060] In some embodiments, such as Figure 7 As shown, the control device 10 also includes an isolated power supply 15. The isolated power supply 15 is connected to both the AC power supply 200 and the first controlled device A1. The isolated power supply 15 is used to output a second DC power supply DC2 from the AC power supply 200 to the first controlled device A1 to supply power to the first controlled device A1. The specific circuit structure of the isolated power supply 15 is common knowledge in the art and will not be described in detail here.
[0061] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
[0062] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. An integrated control system, characterized in that, include: A control device and K controlled devices, where K is an integer greater than or equal to 1; The control device includes: The first zero-crossing detection module is connected to an AC power supply and is used to output a first zero-crossing detection signal based on the AC power supply. The first zero-crossing detection signal is at a first level when the AC power supply is greater than zero and at a second level when the AC power supply is less than or equal to zero. A first control module is connected to the first zero-crossing detection module and is used to output a control signal based on the first zero-crossing detection signal; A switching module, connected to the first control module and between the AC power supply and the controlled device, is used to turn on or off in response to the control signal to output a chopping signal to the controlled device. The timing of the control signal controlling the switching module to turn on and off is determined based on the timing of the first zero-crossing detection signal switching from a high level to a low level or from a low level to a high level. The controlled device includes: The second zero-crossing detection module is connected to the switching module and is used to output a second zero-crossing detection signal based on the chopping signal. The second zero-crossing detection signal is at the first level when the AC power supply is greater than zero, and at the second level when the AC power supply is less than or equal to zero. The second control module is connected to the second zero-crossing detection module and the load. The second control module is used to output a drive signal to the load based on the second zero-crossing detection signal and a preset correspondence, so as to drive the load to be in the working state corresponding to the second zero-crossing detection signal. The preset correspondence is a pre-set correspondence between the second zero-crossing detection signal, the drive signal and the working state.
2. The integrated control system according to claim 1, characterized in that, The switching module includes: A first switching transistor, the first end of which is connected to the first control module to input the control signal, the second end of which is connected to the second zero-crossing detection module, and the third end of which is connected to the live wire of the AC power supply; or, The relay has a coil whose first end is connected to the first control module to input the control signal, and a coil whose second end is grounded. One of the relay's pair of normally open contacts is connected to the second zero-crossing detection module, and the other contact is connected to the live wire of the AC power supply.
3. The integrated control system according to claim 2, characterized in that, The first switching transistor is an NMOS transistor, with its gate being the first terminal, its source being the second terminal, and its drain being the third terminal; or, The first switching transistor is an NPN transistor. The base of the NPN transistor is the first terminal of the first switching transistor, the emitter of the NPN transistor is the second terminal of the first switching transistor, and the collector of the NPN transistor is the third terminal of the first switching transistor.
4. The integrated control system according to claim 1, characterized in that, The first zero-crossing detection module includes a first optocoupler, a first resistor, and a second switching transistor; The anode of the first optocoupler's light emitter is connected to the live wire of the AC power supply, the cathode of the first optocoupler's light emitter is connected to the neutral wire of the AC power supply, the first end of the first optocoupler's light receiver is connected to the first end of the second switching transistor, the second end of the first optocoupler's light receiver is grounded, the second end of the second switching transistor is connected to the first voltage, the third end of the second switching transistor is connected to the first end of the first resistor and the first control module respectively, and the second end of the first resistor is grounded.
5. The integrated control system according to claim 4, characterized in that, The first zero-crossing detection module further includes a second resistor, a third resistor, a fourth resistor, a first diode, a first capacitor, a second capacitor, and a third capacitor; The anode of the first diode is connected to the live wire of the AC power supply, the cathode of the first diode is connected to the first end of the second resistor, the second end of the second resistor is connected to the anode of the light emitter of the first optocoupler, the third resistor is connected between the neutral wire of the AC power supply and the cathode of the light emitter of the first optocoupler, the first capacitor is connected between the first voltage and the first end of the second switching transistor, the second capacitor is connected between the first end of the second switching transistor and ground, the fourth resistor is connected between the third end of the second switching transistor and the first control module, and the third capacitor is connected between the first control module and ground.
6. The integrated control system according to claim 4 or 5, characterized in that, The second switching transistor is a PNP transistor. The base of the PNP transistor is the first terminal of the second switching transistor, the emitter of the PNP transistor is the second terminal of the second switching transistor, and the collector of the PNP transistor is the third terminal of the second switching transistor.
7. The integrated control system according to claim 1, characterized in that, The second zero-crossing detection module includes a second optocoupler, a fifth resistor, and a third switch. The anode of the light emitter of the second optocoupler is connected to the switching module, the cathode of the light emitter of the second optocoupler is connected to the neutral line of the AC power supply, the first end of the light receiver of the second optocoupler is connected to the first end of the third switching transistor, the second end of the light receiver of the second optocoupler is grounded, the second end of the third switching transistor is connected to the first voltage, the third end of the third switching transistor is connected to the first end of the fifth resistor and the second control module respectively, and the second end of the fifth resistor is grounded.
8. The integrated control system according to claim 7, characterized in that, The second zero-crossing detection module also includes a sixth resistor, a seventh resistor, an eighth resistor, a second diode, a fourth capacitor, a fifth capacitor, and a sixth capacitor; The anode of the second diode is connected to the switching module, the cathode of the second diode is connected to the first end of the sixth resistor, the second end of the sixth resistor is connected to the anode of the light emitter of the second optocoupler, the seventh resistor is connected between the neutral line of the AC power supply and the cathode of the light emitter of the second optocoupler, the fourth capacitor is connected between the first voltage and the first end of the third switching transistor, the fifth capacitor is connected between the first end of the third switching transistor and ground, the eighth resistor is connected between the third end of the third switching transistor and the second control module, and the sixth capacitor is connected between the second control module and ground.
9. The integrated control system according to claim 7 or 8, characterized in that, The third switching transistor is a PNP transistor, with the base of the PNP transistor being the first terminal of the third switching transistor, the emitter of the PNP transistor being the second terminal of the third switching transistor, and the collector of the PNP transistor being the third terminal of the third switching transistor.
10. The integrated control system according to claim 1, characterized in that, The control device also includes: A non-isolated power supply, connected to both the AC power supply and the controlled device, is used to output a first DC power supply from the AC power supply to the controlled device to power the controlled device. The live wire or neutral wire of the AC power supply is connected to the positive terminal of the first DC power supply; or, An isolated power supply is connected to both the AC power supply and the controlled device, and is used to output a second DC power supply to the controlled device based on the AC power supply, so as to power the controlled device.