CN219953718U - Control system of AC fan lamp with variable speed capacitor - Google Patents

Abstract

The utility model discloses a control system of an AC fan lamp with a variable speed capacitor.A MCU main control circuit U3 sends PWM instruction signals according to action signals of an execution action input circuit, the PWM instruction signals are transmitted to a fan speed central control circuit and a load output circuit, a fan motor is subjected to gear control through an H bridge control module, or a lamp control instruction is sent, and the switching, dimming or color mixing actions of the lamp are controlled through the lamp load output circuit; the speed change is carried out without setting an AC capacitor, and a PWM signal control mode is used instead, so that the speed change signal is transmitted through a fan integrated central control center, the speed of the fan can be adjusted randomly, the installation, the use and the operation are convenient, the labor and the material cost are saved, the product volume is reduced, the cost is low, and the fan speed change device is stable and reliable.

Description

Control system of AC fan lamp with variable speed capacitor

Technical Field

The utility model belongs to the technical field of manufacturing of fan lamps in household appliances, and particularly relates to a variable-speed capacitor-free AC fan lamp control system.

Background

In the using process of the fan, a plurality of different gear speed levels are usually required to be set according to different environmental conditions and using requirements, and an AC fan in the prior art usually adopts a circuit control mode with a step-down capacitor, and the more the gear speed levels are set, the more the step-down capacitor is required; correspondingly, the more complex the product structure is, the more occupied space is, and the volume is large and heavy; therefore, the volume optimization effect of the traditional AC fan is limited, and the gear speed allocation is limited due to the volume space; in order to meet the requirement of the use function of the fan, the structure of the controller is required to be expanded according to the increase of the variable speed capacitor, and accordingly the volume is also increased, so that the overall structural layout and the assembly and installation process of the fan are influenced, and meanwhile, the production cost, including the cost of warehouse management, processing process and the like, is increased. Meanwhile, in the using process of matching with different fans, the space of the controller is limited, the variable speed capacitance can only be increased to a limited extent, so that the gear of the gear speed can only be increased to a limited extent, and the wind speed allocation effect is limited.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model aims to provide the control system of the AC fan lamp with the non-variable speed capacitor, which does not need to change speed through the AC capacitor, and is replaced by a PWM signal control mode, and a speed change signal is transmitted through a fan integration center control center, so that the speed of the fan can be adjusted at will, and the control system is convenient to operate, low in cost, stable and reliable.

The technical scheme adopted by the utility model is as follows:

a control system of an AC fan lamp with a variable speed capacitor comprises an AC power supply filter circuit, an MCU main control circuit U3, a lamp load output control circuit, an execution action input circuit, an AC-DC power supply voltage stabilizing circuit, a fan speed central control circuit and a load output circuit;

the AC-DC power supply voltage stabilizing circuit, the zero crossing detection circuit, the execution action input circuit, the lamp load output control circuit, the fan speed middle control circuit and the load output circuit are all connected to the MCU main control circuit U3;

the AC power supply filter circuit is used for filtering interference signals of an alternating current power supply; the AC power supply filter circuit is connected to the MCU master control circuit U3 through the zero-crossing detection circuit; the zero-crossing detection circuit is used for compressing the AC power input by the AC power filter circuit and inputting a voltage-stabilizing power to the MCU master control circuit U3;

the execution motion input circuit is connected to the MCU master control circuit U3 and is used for inputting execution motion signals of the lamp and the fan to the MCU master control circuit U3;

the MCU master control circuit U3 is used for controlling the start and stop and the running gear of the fan motor through the fan gear speed central control circuit and the load output circuit according to the input signal of the execution action input circuit; or the MCU master control circuit U3 is used for driving the lamp load output control circuit to control the switching, dimming or color mixing actions of the lamp;

the AC-DC power supply voltage stabilizing circuit is used for converting an alternating current power supply into a stable direct current power supply.

Further, the fan speed central control circuit and the load output circuit are provided with an integrated central control center U2, an AC power supply detection module, a voltage reduction module, an H-bridge control module and a PWM signal transmission module;

the AC power supply detection module, the voltage reduction module, the H-bridge control module and the PWM signal transmission module are all connected to an integrated central control center U2;

the integrated central control center U2 is used for controlling the level of the PWM port through the AC power supply detection module;

the voltage reduction module is used for reducing the voltage of the alternating current power supply output by the AC power supply filter circuit and supplying power to the integrated central control center U2;

the H-bridge control module is used for controlling the start-stop and running gears of the fan motor;

the PWM signal transmission module is used for transmitting PWM control signals output by the MCU master control circuit U3 to the integrated central control center U2.

Further, the integrated central control center U2 is a 24-pin chip, and the integrated central control center U2 is connected to the lamp load output control circuit through the AC power supply detection module and the AC power supply filter circuit in sequence; the integrated central control center U2 is connected to the fan speed central control circuit and the load output circuit through an HVGL pin, an LVGL pin, an HVGR pin and an LVGR pin; and a No. 2 pin NC, a No. 6 pin NC, a No. 22 pin NC and a No. 18 pin NC of the integrated central control center U2 are suspended and do not allow wiring.

Further, the AC power supply detection module includes a first chip U1, where the No. 1 pin and the No. 2 pin of the first chip U1 are connected to the AC power supply filter circuit through ACL pins and ACN pins, the first chip U1 is connected to the No. 9 LV pin of the integrated central control center U2 through the eleventh resistor R11 by the K pin, and the first chip U1 is connected to the No. 1 HV pin of the integrated central control center U2 through the a pin.

Still further, the buck module includes a seventh buck resistor R7, an eighth buck resistor R8, a ninth buck resistor R9, and a tenth buck resistor R10, where the seventh buck resistor R7 and the ninth buck resistor R9 are connected in series to the 24 # SACL pin of the integrated central control center U2, and the eighth buck resistor R8 and the tenth buck resistor R10 are connected in series to the 23 # SACN pin of the integrated central control center U2.

Still further, the H-bridge control module includes a first fet Q1, a second fet Q2, a third fet Q3, and a fourth fet Q4, and the integrated central control center U2 is connected to the load through an input end of the H-bridge control module, so as to output a control signal.

Still further, the PWM signal transmission module includes a photo coupler U4, pin 1 at the input end of the photo coupler U4 is connected to the positive electrode of the electrolytic capacitor C13 of the AC-DC power supply voltage stabilizing circuit, i.e. the hollow arrow icon connected to GND; and the No. 4 pin at the output end of the photoelectric coupler U4 is connected to the No. 13 PWM pin of the integrated central control center U2.

Still further, the AC power supply filter circuit includes a common-mode inductor L7, a fuse F1, a surge absorber TNR1, a first X capacitor CX1 and a second X capacitor CX2, the fuse F1 is connected in series with an N input end of the common-mode inductor L7, the surge absorber TNR1 and the first X capacitor CX1 are connected in parallel between the N input end and the L input end of the common-mode inductor L7, and the second X capacitor CX2 is connected in parallel between an ACN output end and an ACL output end after the common-mode inductor L7;

the AC-DC power supply voltage stabilizing circuit comprises a fifth chip U5 and a sixth chip U6, wherein a No. 4 pin Drain of the fifth chip U5 is connected to an ACN output end of the AC power supply filtering circuit through a first inductance coil L1 and a second diode D2;

pins GND of 5, 6, 7 and 8 of the fifth chip U5 are connected to the ACL output end of the AC power supply filter circuit through a third inductance coil L3; an eleventh capacitor C11 is arranged between the first inductance coil L1 and the third inductance coil L3;

the fifth chip U5 is connected to the No. 2 GND pin and the No. 3 Vout pin of the sixth chip U6 through the third inductance coil L3, and the No. 5 pin, the No. 6 pin, the No. 7 pin and the No. 8 pin of the fifth chip U5 are connected in parallel and then connected to the No. 1 Vin pin of the sixth chip U6 through the first diode D1.

Still further, the execution action input circuit is connected to pin 3 of the MCU master control circuit U3, and the execution action input circuit is an ASK/FSK wireless receiving module, an RF radio frequency receiving module, an IR infrared receiving module and/or a manual control key circuit.

Finally, the lamp load output control circuit comprises a bidirectional thyristor TRIAC4 and a filter coil L2, and is connected to a No. 6 pin of the MCU master control circuit U3;

the zero-crossing detection circuit is connected between an ACZ pin 5 of the MCU master control circuit U3 and an ACN output end of the AC power supply filter circuit; the zero-crossing detection circuit comprises a twenty-first resistor R21T, a fifty-second capacitor C52 and a zener diode ZD1; the zero-crossing detection circuit is used for providing a signal circuit of an AC input power supply for the MCU master control circuit U3, is powered on from an ACN line, is subjected to voltage-stabilizing filtering between-5V after being reduced by R21, and is connected to a No. 5 pin of the MCU master control circuit U3.

The beneficial effects of the utility model are as follows:

the MCU main control circuit U3 sends PWM command signals according to the action signals of the execution action input circuit, the PWM command signals are transmitted to the fan speed middle control circuit and the load output circuit, the H bridge control module is used for carrying out gear control on a fan motor or sending out lamp control commands, and the lamp load output circuit is used for controlling the switching, dimming or color mixing actions of a lamp; the speed change is carried out without setting an AC capacitor, and a PWM signal control mode is used instead, a speed change signal is transmitted through a fan integrated central control center, so that the speed of the fan can be randomly regulated, the installation, the use and the operation are convenient, the labor and the material cost are saved, the product volume is reduced, the cost is low, and the fan speed change device is stable and reliable.

Drawings

FIG. 1 is a schematic diagram of a circuit configuration of a variable capacitor AC fan lamp control system according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the logic of a variable capacitor AC fan lamp control system according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a logic principle of a fan speed central control circuit and a load output circuit of a control system of a variable speed capacitor AC fan lamp according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present utility model.

The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number or order of features in which such is indicated. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present utility model are merely used to explain the relative positional relationship or movement between the components in a particular pose (as shown in the drawings); it will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may also be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1 to 3, in order to provide a control system of an AC fan lamp with a variable speed capacitor, the overall scheme is as follows: firstly, a structure of a control system of an AC fan lamp with a variable speed capacitor is conceived, and the basic structure is composed of an AC power supply filter circuit, an MCU main control circuit U3, a lamp load output control circuit, an execution action input circuit, an AC-DC power supply voltage stabilizing circuit, a fan speed central control circuit and a load output circuit.

The AC-DC power supply voltage stabilizing circuit, the zero crossing detection circuit, the execution action input circuit, the lamp load output control circuit, the fan speed middle control circuit and the load output circuit are all connected to the MCU main control circuit U3.

The AC power supply filter circuit is used for filtering interference signals of an alternating current power supply; the AC power supply filter circuit is connected to the MCU master control circuit U3 through the zero-crossing detection circuit; the zero-crossing detection circuit is used for compressing the AC power input by the AC power filtering circuit and inputting a voltage-stabilizing power to the MCU master control circuit U3.

The execution motion input circuit is connected to the MCU master control circuit U3, and is used for inputting execution motion signals of the lamp and the fan to the MCU master control circuit U3.

The MCU master control circuit U3 is used for controlling the start and stop and the running gear of the fan motor through the fan gear speed central control circuit and the load output circuit according to the input signal of the execution action input circuit; or the MCU master control circuit U3 is used for driving the lamp load output control circuit to control the switching, dimming or toning actions of the lamp.

The AC-DC power supply voltage stabilizing circuit is used for converting an alternating current power supply into a stable direct current power supply.

The integral structure of the control system of the AC fan lamp with the variable speed capacitor is divided into seven blocks of A, B, C, E, F, G and H:

A.AC power supply filter circuit

AC-DC power supply voltage stabilizing circuit

MCU master control circuit

E. Zero-crossing detection circuit

F.RF/IR/2.4/WIFI receiving circuit/hand control button (executive action input circuit)

G. Lamp load output control circuit

H. The fan speed central control circuit and the load output circuit;

the H-zone fan speed central control circuit and the load output circuit are provided with five modules I to V:

i integrated central control center

II step-down module

III H bridge control module

IV AC power supply detection module

And V PWM signal transmission module.

Further, the MCU master control circuit U3 adopts an eight-pin chip, and the AC-DC power supply voltage stabilizing circuit is connected to a voltage signal input port of the MCU master control circuit U3, namely an equipotential connection point; the lamp load output control circuit is connected to a No. 6 LGHT pin of the MCU master control circuit U3; the zero-crossing detection circuit is connected to an ACZ pin No. 5 of the MCU master control circuit U3; the No. 4 VPP pin of the MCU master control circuit U3 is a burning test pin; the control command receiving circuit is connected to pin 3 of the MCU master control circuit U3 (i.e., P3, hereinafter, such a push); the fan speed central control circuit and the load output circuit are connected to a No. 2 pin of the MCU master control circuit U3 through an optocoupler.

A twenty-seventh capacitor C27 connected between the No. 1 pin and the No. 8 pin of the MCU master control circuit U3, wherein the No. 8 pin of the MCU master control circuit U3 is input with negative electricity-5V, the No. 1 pin is grounded, namely the No. 1 pin is connected with positive electricity, and the No. 8 pin is connected with negative electricity; the MCU master control circuit U3 inputs 5 VDC; the pin 3 is a control signal receiving pin, for example, for receiving a control signal transmitted by an RF or IR or 2.4G/WIFI module, the pin 5 is a zero-crossing signal input pin, and the MCU can control the pin 6 to output a low level signal to control a circuit of the G area part of the lamp part according to the zero-crossing signal of the pin 5 and the zero-crossing signal received by the pin 3, or control the pin P2 to output a PWM signal to the H area part to control the gear speed change of the fan.

The AC power is filtered by the A area and is supplied to the B area, the power ACN rectifies and filters the power ACL through D2 and L1 to P4 of a switching power chip U5, P6, P7 and P8 of the U5 are connected together, charging and discharging are carried out between pins P1 through C18, P5, 6, 7 and 8 are connected with R44 and R55 and are connected with L3 connected with P5, 7 and 8 to be loaded on an ACL line, when positive electricity which is half-wave rectification is called ground, a feedback pin P2 of the U5 is connected between P44 and P45 to take a feedback voltage to U5, half-wave of the U5 is supplied to C12, C25, R29 and a load behind the U5 are returned to pins P5, P6, P7 and P8 of the U5 through D1, namely 12 is supplied to a front pole voltage of the three-terminal, namely, the front voltage of the three-terminal is supplied to the front pole P1 through two parallel resistors R31\R32, the front pole pin P1 of the three-voltage stabilizing tube U6, the loaded on the three-terminal P1 is supplied to the front pole pin P45 of the three-voltage stabilizing chip, and the three-terminal voltage C25 and the three-terminal voltage is supplied to the three-terminal C5 through the three-terminal voltage stabilizing chip C29, namely, the three-terminal voltage stabilizing voltage is supplied to the three-terminal voltage stabilizing chip C14 is supplied to the three-terminal voltage stabilizing pins C5, and the three-terminal voltage stabilizing chip is supplied to the three-terminal voltage stabilizing pins C5 through the three voltage stabilizing pins C5.

Further, the fan speed central control circuit and the load output circuit are provided with an integrated central control center U2, an AC power supply detection module, a voltage reduction module, an H-bridge control module and a PWM signal transmission module; the AC power supply detection module, the voltage reduction module, the H-bridge control module and the PWM signal transmission module are all connected to the integrated central control center U2; the integrated central control center U2 is used for controlling the level of the PWM port through the AC power supply detection module; the voltage reducing module is used for reducing the voltage of the alternating current power supply output by the AC power supply filter circuit and supplying power to the integrated central control center U2; the H-bridge control module is used for controlling the start-stop and operation gears of the fan motor; the PWM signal transmission module is used for transmitting PWM control signals output by the MCU master control circuit U3 to the integrated central control center U2.

Further, the integrated central control center U2 is a 24-pin chip; the integrated central control center U2 is connected to the lamp load output control circuit through the AC power supply detection module and the AC power supply filter circuit in sequence; the integrated central control center U2 is connected to the fan speed central control circuit and the load output circuit through an HVGL pin, an LVGL pin, an HVGR pin and an LVGR pin; the No. 2 pin NC, the No. 6 pin NC, the No. 22 pin NC and the No. 18 pin NC of the integrated central control center U2 are suspended and do not allow wiring. TEST1 and TEST2 are TEST points.

A twenty-second capacitor C2 is connected in parallel between a 19 th pin OUTN and a 20 th pin VHR of the integrated central control center U2, and a 8 th pin GND and a 16 th pin GND of the integrated central control center U2 are the grounds of a fan speed central control circuit and a load output circuit, namely the module ground; the No. 15 pin COMP of the integrated central control center U2 is connected to the module ground through a fourth capacitor C4, the No. 14 pin STM of the integrated central control center U2 is connected to the module ground through a twelfth resistor R12, and optionally, the No. 12 pin PWM is connected to PWM signals coupled from the optocoupler U4 and used for controlling the output of a speed signal of a fan, namely, the No. 3 pin, the No. 7 pin, the No. 21 pin and the No. 17 pin respectively output control signals through four control ports HVGL, LVGL, HVGR and LVGR of an H bridge, so that the speed of the fan motor is controlled through the H bridge part. The No. 12 pin of U2 is connected to the module through C5, the No. 11 pin of U2 belongs to the VDD signal pin of the module, and C15 and C3 are connected to the module ground in parallel. The No. 10 pin SYNC of U2 is a reserved setting pin, the No. 9 pin LV of U2 is connected to the K pin of U1 through R11, a capacitor C1 is connected in parallel between the No. 4 pin VHL and the No. 5 pin OUTL of U4, and the No. 1 pin HV of U2 is connected to the A pin of U1. The power supply of the large module of the whole fan speed central control circuit and the load output circuit is self-supplied, is internally integrated, and can complete the control of a central control system with the input of external signals.

Further, the AC power supply detection module includes a first chip U1, a No. 1 pin and a No. 2 pin of the first chip U1 are connected to the AC power supply filter circuit through an ACL pin and an ACN pin, the first chip U1 is connected to a No. 9 LV pin of the integrated central control center U2 through an eleventh resistor R11 through a K pin, and the first chip U1 is connected to a No. 1 HV pin of the integrated central control center U2 through an a pin.

Further, the voltage dropping module comprises a seventh voltage dropping resistor R7, an eighth voltage dropping resistor R8, a ninth voltage dropping resistor R9 and a tenth voltage dropping resistor R10, wherein the seventh voltage dropping resistor R7 and the ninth voltage dropping resistor R9 are connected to a 24 # SACL pin of the integrated central control center U2 in series, and the eighth voltage dropping resistor R8 and the tenth voltage dropping resistor R10 are connected to a 23 # SACN pin of the integrated central control center U2 in series.

The No. 3 pin, the No. 7 pin, the No. 21 pin and the No. 17 pin of the integrated central control center U2 respectively output control signals through four control ports HVGL, LVGL, HVGR and LVGR of the H bridge: the left bridge of the H bridge is formed by butting Q2 and Q4, the signals are connected onto a power ACL in series through a first resistor R1, a signal output by a No. 3 pin of the integrated central control center U2 is connected to a G pole of the Q2 through an HVGL port through a R3, R13 is connected between the G pole and an S pole of the Q2 in parallel, a D pole of the Q2 is connected onto the ACL in series through a R1, a S pole of the Q2 is connected to a D pole of the Q4, a signal output by a No. 7 pin of the integrated central control center U2 is connected to a G pole of the Q4 through an LVGL port through a R5, a R15 is connected between the G pole and the S pole of the Q4 in parallel, and a S pole of the Q4 is directly connected to the grounds of the areas of the fan speed-shifting central control circuit and the load input circuit; the right bridge of the H bridge is formed by butting Q1 and Q3, connecting the Q1 and Q3 with a power ACN in series through R2, connecting a signal output by a 21 st pin of an integrated central control center U2 with a G pole of Q1 through an HVGR port through R4, connecting R14 with a space between the G pole and the S pole of Q1 in parallel, connecting a D pole of Q1 with the ACN in series through R2, connecting a S pole of Q1 with a D pole of Q3, connecting a signal output by a 17 th pin of U2 with a G pole of Q3 through an LVGR port through R6, connecting R16 with a space between the G pole and the S pole of Q3, and directly connecting an S pole of Q3 with the grounds of the fan speed central control circuit and the load input circuit; one of the two access lines of the load motor is connected between the S pole of the left bridge Q2 and the D pole of the Q4, and the other is connected between the S pole of the right bridge Q1 and the D pole of the Q3, so that a control loop of the gear speed of the fan motor is completed.

Further, the H-bridge control module includes a first fet Q1, a second fet Q2, a third fet Q3, and a fourth fet Q4, and the integrated center U2 is connected to a load through an input end of the H-bridge control module, so as to output a control signal.

The first field effect tube Q1, the second field effect tube Q2, the third field effect tube Q3 and the fourth field effect tube Q4 are combined to form an H bridge circuit;

the grid electrode of the first field effect transistor Q1 is connected to a No. 21 HVGR pin of the integrated central control center U2, the grid electrode of the second field effect transistor Q2 is connected to a No. 3 HVGL pin of the integrated central control center U2, the grid electrode of the third field effect transistor Q3 is connected to a No. 17 LVGR pin of the integrated central control center U2, and the grid electrode of the fourth field effect transistor Q4 is connected to a No. 3 LVGL pin of the integrated central control center U2;

the source electrode of the first field effect tube Q1 and the drain electrode of the third field effect tube Q3 are connected in parallel to a 19 # OUTN pin of the integrated central control center U2, and the drain electrode of the first field effect tube Q1 is connected to an ACN connection point of the AC power supply filter circuit, namely an ACN connection point between a 5 # pin ACZ of the MCU master control circuit U3 and a second diode D2 of the fifth chip U5; the source electrode of the third field effect transistor Q3 is connected to the grid electrode of the fourth field effect transistor Q4;

the source electrode of the second field effect transistor Q2 is connected to the drain electrode of the fourth field effect transistor Q4, and the drain electrode of the second field effect transistor Q2 is connected to the No. 5 OUTL pin of the integrated central control center U2.

Further, the PWM signal transmission module comprises a photoelectric coupler U4, and a pin 1 at the input end of the photoelectric coupler U4 is connected to the positive electrode of an electrolytic capacitor C13 of the AC-DC power supply voltage stabilizing circuit, namely, a hollow arrow icon connected with GND; and the No. 4 pin at the output end of the photoelectric coupler U4 is connected to the No. 13 PWM pin of the integrated central control center U2.

The first pin of the photoelectric coupler U4 is connected to the positive pole of the capacitor C13, namely, the hollow arrow icon of GND, the second pin of the U4 is connected to the second pin of the control pin of the U3 through a resistor R27, a capacitor C22 is connected between the first pin and the second pin of the U4 in parallel for filtering, the third pin of the U4 is connected to the ground of the big module of the fan speed central control circuit and the load output circuit, the fourth pin of the U4 is directly connected to the thirteenth pin of the fan central control circuit U2, namely, the coupled PWM signal is transmitted to the central control center of the U2, and a capacitor C21 is connected between the third pin and the fourth pin of the U2 in parallel for filtering. The input end of the photoelectric coupler U4 is connected to the No. 2 pin of the MCU master control circuit U3 through a twenty-second capacitor C22, and the No. 4 pin of the output end of the photoelectric coupler U4 is connected to the No. 13 PWM pin of the integrated central control center U2 through a twenty-first capacitor C21; the No. 1 pin of the MCU master control circuit U3 is a positive electricity lead-in pin connected to the positive electrode of the capacitor C13, namely, an outline arrow icon of GND, and the No. 8 pin of the MCU master control circuit U3 is a negative electricity lead-in pin connected to the negative electrode-5V of the capacitor C13.

The pin 1 of the MCU master control circuit U3 is connected to the positive electricity VDD, and the pin 8 of the MCU master control circuit U3 is connected to the negative electricity VDD; and a pin 2 of the MCU master control circuit U3 is connected to a pin 2 of the input end of the photoelectric coupler U4 through a twenty-seventh resistor R27. P1 of U3 is connected with positive electricity VDD, P8 is connected with negative electricity VDD, P2 is the output of PWM signal, and is given to the 2 nd pin of U4 through R27, and after noise is filtered out through C22 and connected between the first pins of U4, the output of P4 pin is coupled through light. The P13 pin of U2 is PWM signal input pin, ACN power is connected to P23 of U2 via R10/R8, ACL power is connected to P24 of U2 via R9/R7.

The working voltage of the MCU master control circuit U3 is-5 VDC, when receiving the input control signal of the fan, the control pin P2 outputs a phase PWM signal, and the phase PWM signal is coupled to the MCU of the H area through an optical coupler.

Still further, the AC power supply filter circuit includes a common-mode inductance L7, a fuse F1, a surge absorber TNR1, a first X capacitor CX1 and a second X capacitor CX2, the fuse F1 is connected in series with an N input end of the common-mode inductance L7, the surge absorber TNR1 and the first X capacitor CX1 are connected in parallel between the N input end and the L input end of the common-mode inductance L7, and the second X capacitor CX2 is connected in parallel between an ACN output end and an ACL output end after the common-mode inductance L7.

Region a is an AC input power filter circuit: the AC power accessed by the N end is sent to the ACN through the safety ratio F1 to the other coil of the common mode inductance L7, and the AC accessed by the L end is sent to the ACL through the other coil of the common mode inductance L7, wherein the AC power is just accessed, a surge absorber (the voltage is prevented from exceeding the using range) is arranged after the AC power is accessed through a safety tube, noise is filtered by an X capacitor of CX1 bit, noise is filtered by an X2 capacitor connected in parallel with CX2 bit after the common mode safety tube, and a clean power supply input is provided for a following circuit.

The AC-DC power supply voltage stabilizing circuit comprises a fifth chip U5 and a sixth chip U6, and a No. 4 pin Drain of the fifth chip U5 is connected to an ACN connection point of the AC power supply filtering circuit through a first inductance coil L1 and a second diode D2.

Pins GND of pins 6, 7 and 8 of the fifth chip U5 are connected to an ACL output end of the AC power supply filter circuit through a third inductance coil L3; an eleventh capacitor C11 is disposed between the first inductor L1 and the third inductor L3, and filtering after rectification is implemented through the eleventh capacitor C11.

The fifth chip U5 is connected to the No. 2 GND pin and the No. 3 Vout pin of the sixth chip U6 through the third inductance coil L3, and the No. 5 pin, the No. 6 pin, the No. 7 pin and the No. 8 pin of the fifth chip U5 are connected in parallel and then connected to the No. 1 Vin pin of the sixth chip U6 through the first diode D1.

Still further, the execution motion input circuit is an ASK/FSK wireless receiving module, an RF radio frequency receiving module, an IR infrared receiving module and/or a manual control key circuit; the external control command signal is accessed in the form of RF, IR, 2.4G or WIFI, and is transmitted to the P3 pin of the C area through R26 for analysis and processing by the MCU. The execution action input circuit in this example adopts an FSK wireless receiving module to input a control fan control command.

Finally, the lamp load output control circuit comprises a bidirectional thyristor TRIAC4 and a filter coil L2, and is connected to a No. 6 pin of the MCU master control circuit U3. When P3 of the C area receives a LIGHT control signal accessed by the F area, P6 output low level of MCU of the C area controls TRIAC4 to be conducted through R38, namely one end of a load lamp is accessed to CAN, and the other end of the load lamp is conducted to hollow ground, namely ACL through L2 and TRIAC4, so that a loop is completed, and the lamp is lighted; when the P6 pin gives out a signal of PWM phase-cutting angle, the dimming of the lamp or the color mixing function of the LED lamp panel can be realized according to different phase-cutting angle signals.

The zero-crossing detection circuit is used for inputting a compression stabilized power supply to the MCU master control circuit U3; the zero-crossing detection circuit is connected between an ACZ pin No. 5 of the MCU master control circuit U3 and an ACN output end of the AC power supply filter circuit. After the power input from the N input end passes through the filter circuit, the power waveform which is stabilized by-5V through the ZD1.C52 and then is supplied to the compression plate is supplied to the P5 pin of the C area. The zero-crossing detection circuit is used for providing a signal circuit of an AC input power supply for the MCU master control circuit U3, is powered on from an ACN line, is subjected to voltage-stabilizing filtering between-5V after being reduced by R21, and is connected to a No. 5 pin of the MCU master control circuit U3.

According to the control system of the AC fan lamp with the variable speed capacitor, the MCU main control circuit U3 sends PWM command signals according to the action signals of the execution action input circuit, the PWM command signals are transmitted to the fan speed central control circuit and the load output circuit, the H bridge control module is used for carrying out gear control on a fan motor or sending out lamp control commands, and the lamp load output circuit is used for controlling the switching, dimming or color mixing actions of the lamp; the speed change is carried out without setting an AC capacitor, and a PWM signal control mode is used instead, so that the speed change signal is transmitted through a fan integrated central control center, the speed of the fan can be adjusted randomly, the installation, the use and the operation are convenient, the labor and the material cost are saved, the product volume is reduced, the cost is low, and the fan speed change device is stable and reliable.

The utility model overcomes the prior mode of changing speed by using an AC capacitor, but adopts a PWM signal control mode to transmit a speed changing signal to the fan integrated central control center, so that the fan integrated central control center controls the conduction of an H bridge to cut the AC sine wave to finish the change of the gear speed of the motor.

When the main controller receives RF remote control or IR remote control or 2.4G Bluetooth and WIFI and other speed remote control signals related to the fan, the MCU sends PWM instructions to the fan integrated central control center through the optocoupler, the control of the gear of the fan motor is completed through the H bridge, the required speed can be allocated at will according to the requirement of a user, and the fan is simple and random;

when the main controller receives control signals of RF remote control or IR remote control or 2.4G Bluetooth, WIFI and the like of the lamp, the MCU sends an instruction to the lamp load output circuit to finish the switching and dimming or toning actions of the incandescent lamp or the LED lamp, and the specific situation can be determined according to the requirements of users.

The design is applicable to the controller of the fan lamp, whether the controller is an RF remote control receiving device or an IR remote control receiving device or a 2.4G Bluetooth and WIFI receiving device or a control device of the AC fan lamp which directly and manually touches a switch signal, the design device saves labor, material cost, reduces product volume, facilitates the installation and use of AC fans with various structures, and is more convenient for people to realize the requirements of various fan speeds.

The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.

Claims (10)

1. A variable capacitor AC fan lamp control system, characterized by: the power supply control circuit comprises an AC power supply filter circuit, an MCU main control circuit U3, a lamp load output control circuit, an execution action input circuit, an AC-DC power supply voltage stabilizing circuit, a fan speed central control circuit and a load output circuit;

the AC-DC power supply voltage stabilizing circuit, the zero crossing detection circuit, the execution action input circuit, the lamp load output control circuit, the fan speed middle control circuit and the load output circuit are all connected to the MCU main control circuit U3;

the AC power supply filter circuit is used for filtering interference signals of an alternating current power supply; the AC power supply filter circuit is connected to the MCU master control circuit U3 through the zero-crossing detection circuit; the zero-crossing detection circuit is used for compressing the AC power input by the AC power filter circuit and inputting a voltage-stabilizing power to the MCU master control circuit U3;

the execution motion input circuit is connected to the MCU master control circuit U3 and is used for inputting execution motion signals of the lamp and the fan to the MCU master control circuit U3;

the MCU master control circuit U3 is used for controlling the start and stop and the running gear of the fan motor through the fan gear speed central control circuit and the load output circuit according to the input signal of the execution action input circuit; or the MCU master control circuit U3 is used for driving the lamp load output control circuit to control the switching, dimming or color mixing actions of the lamp;

the AC-DC power supply voltage stabilizing circuit is used for converting an alternating current power supply into a stable direct current power supply.

2. The variable capacitor AC fan lamp control system of claim 1, wherein: the fan speed middle control circuit and the load output circuit are provided with an integrated middle control center U2, an AC power supply detection module, a voltage reduction module, an H-bridge control module and a PWM signal transmission module;

the AC power supply detection module, the voltage reduction module, the H-bridge control module and the PWM signal transmission module are all connected to an integrated central control center U2;

the integrated central control center U2 is used for controlling the level of the PWM port through the AC power supply detection module;

the voltage reduction module is used for reducing the voltage of the alternating current power supply output by the AC power supply filter circuit and supplying power to the integrated central control center U2;

the H-bridge control module is used for controlling the start-stop and running gears of the fan motor;

the PWM signal transmission module is used for transmitting PWM control signals output by the MCU master control circuit U3 to the integrated central control center U2.

3. The variable capacitor AC fan lamp control system of claim 2, wherein: the integrated central control center U2 is a 24-pin chip, and the integrated central control center U2 is connected to the lamp load output control circuit through the AC power supply detection module and the AC power supply filter circuit in sequence; the integrated central control center U2 is connected to the fan speed central control circuit and the load output circuit through an HVGL pin, an LVGL pin, an HVGR pin and an LVGR pin; and a No. 2 pin NC, a No. 6 pin NC, a No. 22 pin NC and a No. 18 pin NC of the integrated central control center U2 are suspended and do not allow wiring.

4. The variable capacitor AC fan lamp control system of claim 2, wherein: the AC power supply detection module comprises a first chip U1, wherein a No. 1 pin and a No. 2 pin of the first chip U1 are respectively connected to an AC power supply filter circuit through an ACL pin and an ACN pin, the first chip U1 is connected to a No. 9 LV pin of an integrated central control center U2 through a K pin and an eleventh resistor R11, and the first chip U1 is connected to a No. 1 HV pin of the integrated central control center U2 through an A pin.

5. The variable capacitor AC fan lamp control system of claim 2, wherein: the voltage dropping module comprises a seventh voltage dropping resistor R7, an eighth voltage dropping resistor R8, a ninth voltage dropping resistor R9 and a tenth voltage dropping resistor R10, wherein the seventh voltage dropping resistor R7 and the ninth voltage dropping resistor R9 are connected to a 24 # SACL pin of the integrated central control center U2 in series, and the eighth voltage dropping resistor R8 and the tenth voltage dropping resistor R10 are connected to a 23 # SACN pin of the integrated central control center U2 in series.

6. The variable capacitor AC fan lamp control system of claim 2, wherein: the H-bridge control module comprises a first field effect tube Q1, a second field effect tube Q2, a third field effect tube Q3 and a fourth field effect tube Q4, and the integrated central control center U2 is connected to a load through the input end of the H-bridge control module so as to output a control signal.

7. The variable capacitor AC fan lamp control system of claim 2, wherein: the PWM signal transmission module comprises a photoelectric coupler U4, wherein a pin 1 at the input end of the photoelectric coupler U4 is connected to the positive electrode of an electrolytic capacitor C13 of the AC-DC power supply voltage stabilizing circuit, namely, a hollow arrow icon connected with GND; and the No. 4 pin at the output end of the photoelectric coupler U4 is connected to the No. 13 PWM pin of the integrated central control center U2.

8. The variable capacitor AC fan lamp control system of claim 1, wherein: the AC power supply filter circuit comprises a common-mode inductor L7, a fuse F1, a surge absorber TNR1, a first X capacitor CX1 and a second X capacitor CX2, wherein the fuse F1 is connected in series with the N input end of the common-mode inductor L7, the surge absorber TNR1 and the first X capacitor CX1 are connected in parallel between the N input end and the L input end of the common-mode inductor L7, and the second X capacitor CX2 is connected in parallel between the ACN output end and the ACL output end after the common-mode inductor L7;

the AC-DC power supply voltage stabilizing circuit comprises a fifth chip U5 and a sixth chip U6, wherein a No. 4 pin Drain of the fifth chip U5 is connected to an ACN output end of the AC power supply filtering circuit through a first inductance coil L1 and a second diode D2;

pins GND of 5, 6, 7 and 8 of the fifth chip U5 are connected to the ACL output end of the AC power supply filter circuit through a third inductance coil L3; an eleventh capacitor C11 is arranged between the first inductance coil L1 and the third inductance coil L3;

the fifth chip U5 is connected to the No. 2 GND pin and the No. 3 Vout pin of the sixth chip U6 through the third inductance coil L3, and the No. 5 pin, the No. 6 pin, the No. 7 pin and the No. 8 pin of the fifth chip U5 are connected in parallel and then connected to the No. 1 Vin pin of the sixth chip U6 through the first diode D1.

9. The variable capacitor AC fan lamp control system of claim 1, wherein: the execution action input circuit is connected to a No. 3 pin of the MCU main control circuit U3, and is an ASK/FSK wireless receiving module, an RF radio frequency receiving module, an IR infrared receiving module and/or a manual control key circuit.

10. The variable capacitor AC fan lamp control system of claim 1, wherein: the lamp load output control circuit comprises a bidirectional thyristor TRIAC4 and a filter coil L2, and is connected to a No. 6 pin of the MCU master control circuit U3;

the zero-crossing detection circuit is connected between an ACZ pin 5 of the MCU master control circuit U3 and an ACN output end of the AC power supply filter circuit; the zero-crossing detection circuit comprises a twenty-first resistor R21T, a fifty-second capacitor C52 and a zener diode ZD1; the zero-crossing detection circuit is used for providing a signal circuit of an AC input power supply for the MCU master control circuit U3, is powered on from an ACN line, is subjected to voltage-stabilizing filtering between-5V after being reduced by R21, and is connected to a No. 5 pin of the MCU master control circuit U3.