Fan light control circuit, control method and fan light system

Abstract

The present invention discloses a fan light control circuit, a control method and a fan light system. The fan light control circuit includes a motor control circuit and a lamp panel auxiliary power supply circuit. The motor control circuit has a first input terminal, a second input terminal, a first output terminal, a second output terminal and a ground potential terminal; the first output terminal and the second output terminal are coupled to the motor, and the motor control circuit is used to convert the input alternating current into chopped alternating current and send it to the motor to drive the motor to work. The lamp panel auxiliary power supply circuit is coupled to the lamp panel and the motor control circuit, and is used to cooperate with the motor control circuit to control the conduction state of the power supply circuit in which the lamp panel is located. The first end of the lamp panel is coupled to the first input terminal or the second input terminal of the motor control circuit, and the second end of the lamp panel is coupled to the first output terminal or the second output terminal of the motor control circuit. The present invention can make the single-phase induction motor stepless electronic speed regulator compatible with the current "two-input and three-output" fan light controller wiring, and the motor and the lamp panel can be independently controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic circuits, and relates to a control circuit technology, and in particular to a fan lamp control circuit, a control method, and a fan lamp system. Background Art

[0002] The fan light combines the functions of fan and lighting, and is beautiful and popular in the domestic home appliance market. Traditional fans use tap speed regulation, which has limited speed range and low light load efficiency. To address this problem, the stepless electronic speed regulation solution with high efficiency and high power factor will gradually replace the traditional tap speed regulation solution.

[0003] At the current stage, the traditional solution of fan light controller adopts a "two-input and three-output" wiring method. Figure 1 Wiring diagram for existing fan light and controller; refer to Figure 1 The fan light remote controller 2 is provided with two input terminals, namely the first input terminal 21 and the second input terminal 23, and the two input terminals are connected to the live wire and the neutral wire of the mains respectively. The fan light remote controller 2 is provided with three output terminals, namely the first output terminal 25, the second output terminal 27 and the third output terminal 29. The first output terminal 25 is connected to the live wire 41 of the fan light, the second output terminal 27 is connected to the live wire 43 of the ceiling fan of the fan light, and the third output terminal 29 is connected to the common neutral wire 45 of the fan light. The neutral wire of the motor is shared with the neutral wire of the light, and the live wire of the motor and the light wire are connected to the fan light separately.

[0004] Figure 2 The circuit diagram of the existing bridge type AC chopper motor stepless speed regulation circuit is shown in FIG. Figure 2 The motor speed control circuit has the advantages of small circuit size, low system complexity, low cost, high power factor, and high motor efficiency at low speed. Figure 2 In the circuit structure, the neutral line of the motor is the output of a chopper bridge arm and cannot be shared with the neutral line of the lamp in the existing connection method; therefore, if the fan lamp controller adopts Figure 1 The wiring method cannot be used with Figure 2 The wiring method of the chopper bridge electronic speed regulator is compatible. However, the market for fan lights with the traditional "two-input and three-output" connection method is still huge.

[0005] In view of this, there is an urgent need to design a new fan light control circuit to overcome at least part of the above-mentioned defects of the existing fan light control circuit. Summary of the invention

[0006] The present invention provides a fan lamp control circuit, a control method and a fan lamp system, which can make a single-phase induction motor stepless electronic speed regulator compatible with the current "two-input and three-output" fan lamp controller wiring, and the motor and the lamp panel can be independently controlled.

[0007] To solve the above technical problem, according to one aspect of the present invention, the following technical solution is adopted:

[0008] An embodiment of the present invention discloses a fan light control circuit, the fan light control circuit comprising:

[0009] A motor control circuit having a first input terminal, a second input terminal, a first output terminal, a second output terminal and a ground potential terminal; the first input terminal and the second input terminal are used to couple the alternating current, the first output terminal and the second output terminal are used to couple the motor, and the motor control circuit is used to convert the input alternating current into chopped alternating current and send it to the motor to drive the motor to work; and

[0010] The lamp panel auxiliary power supply circuit is coupled to the lamp panel and the motor control circuit, and is used to cooperate with the motor control circuit to control the conduction state of the power supply circuit in which the lamp panel is located; the first end of the lamp panel is coupled to the first input end or the second input end of the motor control circuit, and the second end of the lamp panel is coupled to the first output end or the second output end of the motor control circuit.

[0011] As an embodiment of the present invention, the auxiliary power supply circuit of the lamp panel includes a fifth switch; the fifth switch is coupled between the lamp panel and the first input terminal or the second input terminal of the motor control circuit.

[0012] As an embodiment of the present invention, the motor control circuit includes a rectifier circuit; the rectifier circuit includes a first diode, a second diode, a third diode and a fourth diode;

[0013] An anode of the first diode is coupled to the second input terminal of the motor control circuit, and a cathode of the first diode is coupled to the positive bus; a cathode of the second diode is coupled to the second input terminal of the motor control circuit, and an anode of the second diode is coupled to the negative bus;

[0014] The anode of the third diode is coupled to the first input terminal of the motor control circuit, and the cathode of the third diode is coupled to the positive bus; the cathode of the fourth diode is coupled to the first input terminal of the motor control circuit, and the anode of the fourth diode is coupled to the negative bus.

[0015] As an embodiment of the present invention, the motor control circuit includes a chopper circuit; the chopper circuit is used to convert the rectified alternating current into a chopped alternating current; the chopper circuit includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube;

[0016] The first switch tube is coupled between the first output terminal of the motor control circuit and the positive bus; the second switch tube is coupled between the first output terminal of the motor control circuit and the negative bus;

[0017] The third switch tube is coupled between the second output terminal of the motor control circuit and the positive bus; the fourth switch tube is coupled between the second output terminal of the motor control circuit and the negative bus.

[0018] As an embodiment of the present invention, in the first state, the motor and the lamp panel work simultaneously; the lamp panel auxiliary power supply circuit controls the fifth switch to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor.

[0019] As an embodiment of the present invention, in the third state, the motor does not work, and the lamp panel works; the lamp panel auxiliary power supply circuit controls the fifth switch to turn on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor is in a stopped state.

[0020] As an embodiment of the present invention, in the second state, the motor works, the lamp panel does not work, and the power supply circuit of the lamp panel is in an open circuit state; the motor control circuit controls the motor to work in the first power frequency half cycle and / or the second power frequency half cycle;

[0021] In the fourth state, the motor and the lamp panel are not working, the power supply circuit of the lamp panel is in an open circuit state, and the motor control circuit controls the motor to stop.

[0022] As an embodiment of the present invention, in the first state, the lamp panel auxiliary power supply circuit and the motor control circuit cooperate to control the conduction state of the power supply circuit in which the lamp panel is located to be a conduction state, and the motor control circuit controls the terminal voltage of the output end of the motor control circuit coupled to the lamp panel, so that at least half of the industrial frequency cycle is used to power the lamp panel; and the motor control circuit controls the terminal voltage of the other output end of the motor control circuit, thereby obtaining an AC chopper drive voltage to make the motor work.

[0023] One embodiment of the present invention discloses a fan light system, which includes a motor, a light panel, and any of the above fan light control circuits, wherein the first end of the motor is coupled to the first output end of the motor control circuit, and the second end of the motor is coupled to the second output end of the motor control circuit.

[0024] An embodiment of the present invention discloses a fan lamp control method, which is used to control the operation of a fan lamp system. The fan lamp system includes a motor, a lamp panel, and a fan lamp control circuit. The fan lamp control circuit includes a motor control circuit and a lamp panel auxiliary power supply circuit. The first end of the lamp panel is coupled to the first input end or the second input end of the motor control circuit, and the second end of the lamp panel is coupled to the first output end or the second output end of the motor control circuit. The lamp panel auxiliary power supply circuit includes a fifth switch. The motor control circuit includes a chopper circuit. The chopper circuit is used to convert rectified alternating current into chopped alternating current. The chopper circuit includes a first switch tube, a second switch tube, a third switch tube, and a fourth switch tube. The fan lamp control method includes:

[0025] Using the lamp panel auxiliary power supply circuit and the motor control circuit to control the conduction state of the power supply circuit of the lamp panel, thereby controlling the working state of the lamp panel; and

[0026] The motor control circuit converts the input AC power into motor voltage and sends it to the motor, thereby controlling the working state of the motor.

[0027] As an embodiment of the present invention, the fan light control method further includes: in a first state, controlling the fifth switch to be turned on, and the motor control circuit controlling the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and working; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor.

[0028] As an embodiment of the present invention, the fan lamp control method further includes: in the second state, controlling the power supply circuit of the lamp panel to be in an open circuit state, and the lamp panel does not work; using the motor control circuit to control the motor to operate in the first power frequency half cycle and / or the second power frequency half cycle.

[0029] As an embodiment of the present invention, the fan light control method further includes: in the third state, controlling the fifth switch to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and working; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor is in a stopped state.

[0030] As an embodiment of the present invention, the fan lamp control method further includes: in a fourth state, controlling the power supply circuit of the lamp panel to be in an open circuit state, and using the motor control circuit to control the motor to stop working.

[0031] The beneficial effects of the present invention are as follows: the fan light control circuit, control method and fan light system proposed in the present invention can make the single-phase induction motor stepless electronic speed regulator compatible with the current "two-input and three-output" fan light controller wiring, the motor and the light panel can be independently controlled, and the motor speed can be deeply steplessly adjusted. The present invention effectively reduces the complexity and cost of the system, has a high power factor, and can greatly improve the efficiency of the motor at low speed, while having better noise performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a wiring diagram for the existing fan light and controller.

[0033] Figure 2 The invention is a circuit diagram of an existing bridge type AC chopper motor stepless speed regulation circuit.

[0034] Figure 3 FIG. 4 is a circuit diagram of a fan light system according to an embodiment of the present invention.

[0035] Figure 4 It is a schematic diagram of a power supply circuit of a lamp panel in a certain state according to an embodiment of the present invention.

[0036] Figure 5 It is a schematic diagram of a power supply circuit of a lamp panel in another state according to an embodiment of the present invention.

[0037] Figure 6 Schematic diagram of a lamp panel power supply circuit in another state according to an embodiment of the present invention.

[0038] Figure 7 Schematic diagram of a lamp panel power supply circuit in another state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0041] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced within the scope of the present invention.

[0042] The "coupling" or "connection" in the specification includes both direct connection and indirect connection, such as connection through some active devices, passive devices or electrically conductive media; it may also include connection through other active devices or passive devices known to those skilled in the art on the basis of achieving the same or similar functional purposes, such as connection through circuits or components such as switches and follower circuits. In the present invention, the term "lamp panel" refers to the lamp in the fan lamp system and is not used to limit the style or structure of the lamp in the fan lamp system.

[0043] One embodiment of the present invention discloses a fan light control circuit for a fan light system, and the fan light control circuit includes a motor control circuit and a lamp panel auxiliary power supply circuit. The motor control circuit has a first input terminal, a second input terminal, a first output terminal, a second output terminal and a ground potential terminal. The first input terminal and the second input terminal of the motor control circuit are used to couple alternating current, and the first output terminal and the second output terminal of the motor control circuit are used to couple the motor. The motor control circuit is used to convert the input alternating current into chopped alternating current and send it to the motor to drive the motor to work. The lamp panel auxiliary power supply circuit couples the lamp panel and the motor control circuit, and the lamp panel auxiliary power supply circuit is used to cooperate with the motor control circuit to control the conduction state of the power supply circuit in which the lamp panel is located. The first end of the lamp panel is coupled to the first input terminal or the second input terminal of the motor control circuit, and the second end of the lamp panel is coupled to the first output terminal or the second output terminal of the motor control circuit.

[0044] The present invention discloses a fan light control circuit. Figure 3 FIG. 1 is a circuit diagram of a fan light system in one embodiment of the present invention. The fan light system includes a motor, a light panel L1 and a fan light control circuit. Figure 3 In one embodiment of the present invention, the fan lamp control circuit includes: a motor control circuit 1 and a lamp panel auxiliary power supply circuit 3.

[0045] The motor control circuit 1 has a first input terminal, a second input terminal, a first output terminal, a second output terminal and a ground potential terminal; the first input terminal and the second input terminal are used to couple the alternating current, the first output terminal and the second output terminal are used to couple the motor, and the motor control circuit 1 is used to convert the input alternating current Vac into a controlled chopped alternating current Vo and then send it to the motor to drive the motor to work. The lamp panel auxiliary power supply circuit 3 is coupled to the lamp panel L1 and the motor control circuit 1, and is used to cooperate with the motor control circuit 1 to control the conduction state of the power supply circuit of the lamp panel L1.

[0046] See also Figure 3 In one embodiment of the present invention, the lamp panel auxiliary power supply circuit 3 includes a fifth switch K5; the first end of the fifth switch K5 is coupled to the first input end of the motor control circuit 1; the first input end of the lamp panel L1 is coupled to the second end of the fifth switch K5, and the second input end of the lamp panel L1 is coupled to the first output end of the motor control circuit 1.

[0047] Please continue reading Figure 3In one embodiment of the present invention, the motor control circuit 1 may include a rectifier circuit 11; the rectifier circuit 11 includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. The anode of the first diode D1 is coupled to the second input terminal of the motor control circuit 1, and the cathode of the first diode D1 is coupled to the positive bus. The cathode of the second diode D2 is coupled to the second input terminal of the motor control circuit 1, and the anode of the second diode D2 is coupled to the negative bus. The anode of the third diode D3 is coupled to the first input terminal of the motor control circuit 1, and the cathode of the third diode D3 is coupled to the positive bus. The cathode of the fourth diode D4 is coupled to the first input terminal of the motor control circuit 1, and the anode of the fourth diode D4 is coupled to the negative bus. In one embodiment of the present invention, the positive bus and the negative bus are the output terminals of the rectifier circuit, and the negative bus is coupled to the reference ground.

[0048] like Figure 3 As shown, in one embodiment of the present invention, the motor control circuit 1 may further include a chopper circuit 13; the chopper circuit 13 is used to convert the rectified alternating current into a controlled chopped alternating current. In one embodiment, the chopper circuit 13 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3 and a fourth switch tube Q4. In one embodiment of the present invention, the first switch tube Q1 is also connected in parallel with a fifth diode D5, the cathode of the fifth diode D5 is coupled to the positive bus, and the anode of the fifth diode D5 is coupled to the first output end of the motor control circuit. The second switch tube Q2 is also connected in parallel with a sixth diode D6, the cathode of the sixth diode D6 is coupled to the first output end of the motor control circuit, and the anode of the sixth diode D6 is coupled to the negative bus. The third switch tube Q3 is also connected in parallel with a seventh diode D7, the cathode of the seventh diode D7 is coupled to the positive bus, and the anode of the seventh diode D7 is coupled to the second output end of the motor control circuit. The fourth switch tube Q4 is also connected in parallel with an eighth diode D8, the cathode of the eighth diode D8 is coupled to the second output terminal of the motor control circuit, and the anode of the eighth diode D8 is coupled to the negative bus. In another embodiment, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 can be field effect transistors, and of course other switch forms can also be used. In one embodiment of the present invention, the switch tubes Q1-Q4 can be metal oxide semiconductor field effect transistors (MOSFET), junction field effect transistors (JFET) or insulated gate bipolar transistors (IGBT), etc. Preferably, the switch tubes Q1-Q4 include parasitic body diodes to achieve asynchronous rectification functions. In another embodiment of the present invention, the switch tubes Q1-Q4 can also be connected in parallel with discrete diodes. Each of the switch tubes Q1-Q4 can be replaced by a combination of multiple switch tubes or a combination of switch tubes and diodes. Figure 3As shown, the first switch tube Q1 is coupled between the first output terminal of the motor control circuit 1 and the positive bus; the second switch tube Q2 is coupled between the first output terminal of the motor control circuit 1 and the negative bus; the third switch tube Q3 is coupled between the second output terminal of the motor control circuit and the positive bus; the fourth switch tube Q4 is coupled between the second output terminal of the motor control circuit 1 and the negative bus.

[0049] In one embodiment of the present invention, in the first state, the motor and the lamp panel work simultaneously. The lamp panel auxiliary power supply circuit includes a fifth switch, and the fifth switch is coupled between the lamp panel and the first input terminal or the second input terminal of the motor control circuit. The lamp panel auxiliary power supply circuit controls the fifth switch to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works. The motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor. In one embodiment, the half-bridge arm refers to a half-bridge unit, the first switch tube Q1 and the second switch tube Q2 constitute the first half-bridge arm, and the third switch tube Q3 and the fourth switch tube Q4 constitute the second half-bridge arm. In one embodiment of the present invention, the half-bridge arm coupled to the lamp panel refers to the half-bridge arm directly coupled to the lamp panel, which can be the first half-bridge arm or the second half-bridge arm. When the half-bridge arm coupled to the lamp panel is the first half-bridge arm, the other arm is the second half-bridge arm.

[0050] In one embodiment of the present invention, in the first state, the motor and the lamp panel L1 work simultaneously, and the power supply circuit of the lamp panel is in a pass state, that is, the lamp panel auxiliary power supply circuit 3 is in a pass state (controlling the fifth switch K5 to be closed). The lamp panel auxiliary power supply circuit 3 and the motor control circuit 1 cooperate to control the conduction state of the power supply circuit of the lamp panel L1, so that the lamp panel L1 works in the first power frequency half cycle and / or the second power frequency half cycle. The motor control circuit 1 controls the motor to work in the first power frequency half cycle and / or the second power frequency half cycle. In another embodiment of the present invention, the lamp panel is coupled to the first output end of the motor control circuit. In the first state, the lamp panel auxiliary power supply circuit and the motor control circuit cooperate to control the conduction state of the power supply circuit of the lamp panel to be a pass state, and the motor control circuit controls the terminal voltage of the first output end of the motor control circuit, so that a voltage difference is formed at both ends of the lamp panel, so that at least half of the power frequency cycle supplies power to the lamp panel. At the same time, the motor control circuit controls the terminal voltage of the second output end of the motor control circuit, so as to obtain an AC chopper drive voltage to operate the motor. In one embodiment, the motor control circuit can control the motor according to the "single-phase motor stepless speed regulation circuit and speed regulation method" disclosed in Chinese patent CN201811566584.3. In one embodiment of the present invention, in the first state, the lamp panel auxiliary power supply circuit 3 controls the fifth switch K5 to be turned on. The motor control circuit 1 controls the first switch tube Q1 to be turned on and controls the switching state of the fourth switch tube Q4 to form a chopped alternating current to control the operation of the motor, or the motor control circuit 1 controls the second switch tube Q2 to be turned on and controls the switching state of the third switch tube Q3 to form a chopped alternating current to control the operation of the motor. Among them, the fifth switch K5 is turned on, and one of the first switch tube Q1 and the second switch tube Q2 is turned on, and the lamp panel works. In the corresponding power frequency half cycle of the motor operation, the motor control circuit 1 controls the voltage difference between the two ends of the lamp panel L1 to realize the power supply to the lamp panel L1.

[0051] In one embodiment of the present invention, the power supply circuit of the lamp panel has two corresponding working modes, namely, the power frequency half-cycle positive bus voltage output mode (corresponding to Figure 5 ) or power frequency half cycle negative bus voltage output mode (corresponding to Figure 4 ).like Figure 4 As shown, when the fifth switch K5 is turned on and the second switch tube Q2 is turned on, as shown in Figure 4 As shown by the dotted line, the power supply circuit of the lamp panel L1 is formed, and the lamp panel L1 works. Figure 5 As shown, when the fifth switch K5 is turned on and the first switch tube Q1 is turned on, as shown in Figure 5 As shown by the dotted line, the power supply circuit of the lamp panel L1 is formed, and the lamp panel L1 works. The lamp panel can be powered by one or a combination of the above two working modes. In this way, at least a complete half cycle of the power frequency can be guaranteed to power the lamp panel L1 without affecting the operation of the motor.

[0052] In one embodiment of the present invention, in the second state, the motor is working and the lamp panel L1 is not working. The fifth switch K5 is disconnected, the lamp panel L1 stops working, and the motor works normally independently. The motor control circuit 1 controls the motor to work in the first power frequency half cycle or the second power frequency half cycle. In one embodiment of the present invention, the first switch tube and the fourth switch tube are switched on and off to perform chopping, and the second switch tube and the third switch tube are turned off at the same time, so as to control the operation of the motor. In another embodiment of the present invention, the second switch tube and the third switch tube are switched on and off to perform chopping, and the first switch tube and the fourth switch tube are turned off at the same time, so as to control the operation of the motor.

[0053] In one embodiment of the present invention, in the third state, the motor does not work, and the lamp panel works. The lamp panel auxiliary power supply circuit includes a fifth switch, and the fifth switch is coupled between the lamp panel and the first input terminal or the second input terminal of the motor control circuit. The lamp panel auxiliary power supply circuit controls the fifth switch to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works. The motor control circuit controls the switch tube in the other half-bridge arm so that the motor is in a stopped state.

[0054] In one embodiment of the present invention, in the third state, the motor does not work, the lamp panel L1 works, and the fifth switch K5 is closed; the upper switch tube (first switch tube Q1) in the half-bridge arm coupled to the lamp panel is constantly turned on or the lower switch tube (second switch tube Q2) is constantly turned on or the upper and lower switch tubes (first switch tube Q1 and second switch tube Q2) are complementary turned on, so that a voltage difference is formed at both ends of the lamp panel L1 to realize the power supply of the lamp panel L1, and the two switch tubes (third switch tube Q3 and fourth switch tube Q4) corresponding to the half-bridge arm not connected to the lamp panel are in the off state, and the motor stops. The first switch tube Q1 and the second switch tube Q2 constitute the first half-bridge arm, and the third switch tube Q3 and the fourth switch tube Q4 constitute the second half-bridge arm. In one embodiment of the present invention, Figure 6 As shown, the second switch tube Q2 and the fourth switch tube Q4 are controlled to be turned on, and the first switch tube Q1 and the third switch tube Q3 are turned off. The advantage of this is that the order of the two half-bridge arms of the motor does not need to be distinguished in the third state. In another embodiment of the present invention, as Figure 7 As shown, the second switch tube Q2 is controlled to be turned on, and the first switch tube Q1, the third switch tube Q3 and the fourth switch tube Q4 are turned off. In order to make the lamp panel work, in addition to this, another half cycle of the power frequency can make the first switch tube Q1 turned on and the second switch tube Q2 turned off.

[0055] In one embodiment of the present invention, in the fourth state, the motor and the lamp panel L1 do not work, and the fifth switch K5 is disconnected. In the fourth state, the first switch tube Q1 and the fourth switch tube Q4 are not turned on at the same time, and the second switch tube Q2 and the third switch tube Q3 are not turned on at the same time, and the motor control circuit 1 controls the motor to stop. In another embodiment, in the fourth state, the motor and the lamp panel L1 do not work, the fifth switch K5 is turned on, and the first switch tube Q1 and the second switch tube Q2 are not turned on. At this time, the power supply circuit of the lamp panel is in an open circuit state, the lamp panel does not work, and the motor does not work at the same time.

[0056] In one embodiment of the present invention, a fan light system is disclosed, which includes a motor, a light panel, and the fan light control circuit as described above, wherein the first end of the motor is coupled to the first output end of the motor control circuit, and the second end of the motor is coupled to the second output end of the motor control circuit.

[0057] The present invention also discloses a fan lamp control method, which is used to control the operation of a fan lamp system. The fan lamp system includes a motor, a lamp panel, and a fan lamp control circuit. The fan lamp control circuit includes a motor control circuit and a lamp panel auxiliary power supply circuit. The first end of the lamp panel is coupled to the first input end or the second input end of the motor control circuit, and the second end of the lamp panel is coupled to the first output end of the motor control circuit. The lamp panel auxiliary power supply circuit includes a fifth switch, which is coupled between the lamp panel and the first input end or the second input end of the motor control circuit. The motor control circuit includes a chopper circuit, which is used to convert rectified alternating current into chopped alternating current. The chopper circuit includes a first switch tube, a second switch tube, a third switch tube, and a fourth switch tube. The fan lamp control method includes: using the lamp panel auxiliary power supply circuit and the motor control circuit to control the conduction state of the power supply circuit in which the lamp panel is located, thereby controlling the working state of the lamp panel; and using the motor control circuit to convert the input alternating current into a motor voltage and then send it to the motor, thereby controlling the working state of the motor. The conduction state of the power supply circuit of the lamp panel is divided into a circuit state and a circuit breaker state. The circuit state means that current flows through the lamp panel and the lamp panel works.

[0058] In one embodiment of the present invention, the fan lamp control method further includes: in the first state, controlling the fifth switch to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works. The motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor. In a specific embodiment of the present invention, the switch tube in the half-bridge arm coupled to the lamp panel can be a first switch tube and a second switch tube, and the motor control circuit controls the switch state of the first switch tube and the second switch tube so that the lamp panel is turned on and works. The switch tube in the other half-bridge arm is a third switch tube and a fourth switch tube, and the motor control circuit controls the switch state of the third switch tube and the fourth switch tube so that the motor voltage is an AC chopping signal, thereby driving the motor.

[0059] In one embodiment of the present invention, the fan lamp control method may further include the following steps: in a first state, the lamp panel power supply circuit is controlled to be in a conducting state; first, the lamp panel auxiliary power supply circuit and the motor control circuit are used to cooperate to control the conduction state of the power supply circuit of the lamp panel to be in a conducting state, and the motor control circuit controls the terminal voltage of the output end of the motor control circuit coupled to the lamp panel, so that at least half of the power frequency cycle is used to power the lamp panel; secondly, the motor control circuit is used to control the terminal voltage of the other output end of the motor control circuit, thereby obtaining an AC chopper drive voltage to make the motor work.

[0060] In one embodiment of the present invention, the fan lamp control method may further include the following steps: in the second state, the power supply circuit of the lamp panel is controlled to be in an open circuit state, and the lamp panel does not work; and the motor control circuit is used to control the motor to operate in the first power frequency half cycle and / or the second power frequency half cycle.

[0061] In one embodiment of the present invention, the fan light control method may further include the following steps: in the third state, the fifth switch is controlled to be turned on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor is in a stopped state.

[0062] In one embodiment of the present invention, the fan lamp control method may further include the following steps: in the fourth state, the lamp panel auxiliary power supply circuit (such as the fifth switch K5) is controlled to be in an open circuit state, and the motor control circuit controls the motor to stop working.

[0063] In summary, the fan light control circuit, control method and fan light system proposed in the present invention can make the single-phase induction motor stepless electronic speed regulator compatible with the current "two-input and three-output" fan light controller wiring, the motor and the light panel can be independently controlled, and the motor speed can be deeply steplessly adjusted. "Two inputs" are the two input terminals of the motor control circuit, that is, the two AC input terminals. "Three outputs" are the two output terminals of the motor control circuit and one of the input terminals of the motor control circuit. The present invention effectively reduces the complexity and cost of the system, has a higher power factor, and can greatly improve the efficiency of the motor at low speeds, while having better noise performance.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The description and application of the present invention here are illustrative, and it is not intended to limit the scope of the present invention to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be embodied in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. The deformation and change of the embodiments disclosed here are possible, and the replacement of the embodiments and the various equivalent parts are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential features of the present invention. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. A fan light control circuit, characterized in that: The fan light control circuit comprises: A motor control circuit, comprising a first input terminal, a second input terminal, a first output terminal, a second output terminal and a ground potential terminal; the first input terminal and the second input terminal are used to couple to alternating current, the first output terminal and the second output terminal are used to couple to a motor, the motor control circuit is used to convert the input alternating current into chopped alternating current and then send it to the motor to drive the motor to work; the motor control circuit comprises a rectifier circuit and a chopper circuit, the rectifier circuit comprises a bridge rectifier circuit, and the chopper circuit comprises an H-bridge circuit; and The lamp panel auxiliary power supply circuit is coupled to the lamp panel and the motor control circuit, and is used to cooperate with the motor control circuit to control the conduction state of the power supply circuit of the lamp panel; the first end of the lamp panel is coupled to the first input end or the second input end of the motor control circuit, and the second end of the lamp panel is coupled to the first output end or the second output end of the motor control circuit; the lamp panel auxiliary power supply circuit includes a fifth switch, and the fifth switch is coupled between the lamp panel and the first input end or the second input end of the motor control circuit.

2. The fan light control circuit according to claim 1, characterized in that: The rectifier circuit includes a first diode, a second diode, a third diode and a fourth diode; The anode of the first diode is coupled to the second input terminal of the motor control circuit, and the cathode of the first diode is coupled to the positive bus; the cathode of the second diode is coupled to the second input terminal of the motor control circuit, and the anode of the second diode is coupled to the negative bus; An anode of the third diode is coupled to the first input terminal of the motor control circuit, and a cathode of the third diode is coupled to the positive bus; A cathode of the fourth diode is coupled to the first input terminal of the motor control circuit, and an anode of the fourth diode is coupled to the negative bus.

3. The fan light control circuit according to claim 1, characterized in that: The chopper circuit is used to convert the rectified alternating current into chopped alternating current; the chopper circuit includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; The first switch tube is coupled between the first output terminal of the motor control circuit and the positive bus; the second switch tube is coupled between the first output terminal of the motor control circuit and the negative bus; The third switch tube is coupled between the second output terminal of the motor control circuit and the positive bus; The fourth switch tube is coupled between the second output terminal of the motor control circuit and the negative bus.

4. The fan light control circuit according to claim 3, characterized in that: In the first state, the motor and the lamp panel work simultaneously; the lamp panel auxiliary power supply circuit controls the fifth switch to turn on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and works; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor.

5. The fan light control circuit according to claim 3, characterized in that: In the third state, the motor does not work, but the lamp panel works; the lamp panel auxiliary power supply circuit controls the fifth switch to turn on, and the motor control circuit controls the switch tube in the half-bridge arm coupled to the lamp panel to make the lamp panel turn on and work; the motor control circuit controls the switch tube in the other half-bridge arm to make the motor in a stopped state.

6. The fan light control circuit according to claim 3, characterized in that: In the second state, the motor works, the lamp panel does not work, and the power supply circuit of the lamp panel is in an open circuit state; the motor control circuit controls the motor to work in the first power frequency half cycle and / or the second power frequency half cycle; In the fourth state, the motor and the lamp panel are not working, the power supply circuit of the lamp panel is in an open circuit state, and the motor control circuit controls the motor to stop.

7. The fan light control circuit according to claim 3, characterized in that: In the first state, the lamp panel auxiliary power supply circuit and the motor control circuit cooperate to control the conduction state of the power supply circuit of the lamp panel to be in the on state, and the motor control circuit controls the terminal voltage of the output end of the motor control circuit coupled to the lamp panel, so that at least half of the power frequency cycle is used to power the lamp panel; and the motor control circuit controls the terminal voltage of the other output end of the motor control circuit, thereby obtaining an AC chopper drive voltage to make the motor work.

8. A fan light system, characterized in that: The fan light system includes a motor, a light panel, and a fan light control circuit as described in any one of claims 1-7, wherein the first end of the motor is coupled to the first output end of the motor control circuit, and the second end of the motor is coupled to the second output end of the motor control circuit.

9. A fan light control method, characterized in that: The fan light control method is used to control the operation of a fan light system, wherein the fan light system includes a motor, a light panel, and a fan light control circuit, wherein the fan light control circuit includes a motor control circuit and a light panel auxiliary power supply circuit, wherein a first end of the light panel is coupled to a first input end or a second input end of the motor control circuit, and a second end of the light panel is coupled to a first output end or a second output end of the motor control circuit; The lamp panel auxiliary power supply circuit includes a fifth switch, and the fifth switch is coupled between the lamp panel and the first input terminal or the second input terminal of the motor control circuit; the motor control circuit includes a chopper circuit and a rectifier circuit, the rectifier circuit includes a bridge rectifier circuit, and the chopper circuit includes an H-bridge circuit; the chopper circuit is used to convert the rectified alternating current into a chopped alternating current; the chopper circuit includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; the fan lamp control method includes: The conduction state of the power supply circuit of the lamp panel is controlled by the lamp panel auxiliary power supply circuit and the motor control circuit, thereby controlling the working state of the lamp panel; as well as The motor control circuit converts the input alternating current into a motor voltage and sends it to the motor, thereby controlling the working state of the motor.

10. The fan light control method according to claim 9, characterized in that: The fan light control method further includes: in the first state, controlling the fifth switch to be turned on, and the motor control circuit controlling the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and working; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor voltage is an AC chopping signal, thereby driving the motor.

11. The fan light control method according to claim 9, characterized in that: The fan lamp control method further includes: in the second state, controlling the power supply circuit of the lamp panel to be in an open circuit state, and the lamp panel does not work; and using the motor control circuit to control the motor to work in the first power frequency half cycle and / or the second power frequency half cycle.

12. The fan light control method according to claim 9, characterized in that: The fan light control method further includes: in the third state, controlling the fifth switch to be turned on, and the motor control circuit controlling the switch tube in the half-bridge arm coupled to the lamp panel so that the lamp panel is turned on and working; the motor control circuit controls the switch tube in the other half-bridge arm so that the motor is in a stopped state.

13. The fan light control method according to claim 9, characterized in that: The fan lamp control method further comprises: in a fourth state, controlling the power supply circuit of the lamp panel to be in an open circuit state, and using the motor control circuit to control the motor to stop working.

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