WO2015180136A1 - Commutateur de gradation et procédé de gradation associé - Google Patents

Commutateur de gradation et procédé de gradation associé Download PDF

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Publication number
WO2015180136A1
WO2015180136A1 PCT/CN2014/078930 CN2014078930W WO2015180136A1 WO 2015180136 A1 WO2015180136 A1 WO 2015180136A1 CN 2014078930 W CN2014078930 W CN 2014078930W WO 2015180136 A1 WO2015180136 A1 WO 2015180136A1
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WIPO (PCT)
Prior art keywords
resistor
power supply
circuit
driving circuit
transistor
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Application number
PCT/CN2014/078930
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English (en)
Chinese (zh)
Inventor
王晓元
Original Assignee
王晓元
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Publication date
Application filed by 王晓元 filed Critical 王晓元
Priority to PCT/CN2014/078930 priority Critical patent/WO2015180136A1/fr
Publication of WO2015180136A1 publication Critical patent/WO2015180136A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button

Definitions

  • the invention relates to a switch, in particular to a dimmer switch and a dimming method thereof.
  • Dimming is developed to meet the different needs of people at different times for working parameters such as brightness and color temperature.
  • electronic dimming controls the degree of conduction by controlling and changing the phase angle of the thyristor, that is, the time during which the power source flows through the load, thus changing the voltage and current input to the electric light source to obtain light outputs of different intensities.
  • the dimmer switch can meet the different needs of people at different times, and can directly replace the existing wall switch. Suitable for family rooms, apartments, hotels, hospitals and other public places. With the improvement of living standards, people are inseparable from the light, and they are inseparable from the requirements for the quality of light.
  • the need for dimming can be broadly divided into three categories:
  • the function of the need to adjust the light such as entrance to the entrance, meeting rooms, etc.
  • the comfort of life and the embodiment of life style such as the light and dark combination of the light, the color temperature is warm and cold, can be adjusted according to the needs of the environment, but also can play the role of setting the atmosphere;
  • a variety of electric lamps including various conventional bulbs and LED lamps of different types and different powers, which are widely used, so that different lamps need to be respectively provided with matching driving circuits for driving according to the received dimming Commands that control operating parameters such as brightness and color temperature of the lamp.
  • the current LED driving circuit has been assembled with the LED as a whole, that is, the LED lamp itself has a driving circuit, then the dimming switch on the wall is no longer directly controlling the operating parameters such as the brightness and color temperature of the LED lamp, and It is to provide a dimming command to the driving circuit of the LED lamp.
  • the current dimmer switch is usually an independent control device, which requires separate wiring to communicate with the driving circuit of the LED lamp.
  • the assembly circuit is very complicated and cumbersome.
  • Another type of dimmer switch is connected in series on the live line, using the zero-crossing point of the mains AC (ie, the junction of positive and negative voltages), adding the encoded high-frequency control signal within a limited time of the zero-crossing point, and transmitting through the mains line.
  • the driving circuit of the LED lamp acquires a control signal, and the control signal is decoded by a preset decoding protocol to obtain a dimming command, thereby controlling the working parameters such as brightness and color temperature of the LED lamp.
  • the AC zero-crossing time is usually less than 3ms (milliseconds).
  • the control signal frequency must be very high, and subsequent decoding is easily distorted, resulting in unstable operation.
  • the LED lamp needs to accurately detect/catch the zero-crossing point of the power supply to ensure the stability of the subsequent work.
  • the circuit The zero crossing will drift, and the current technology cannot accurately capture the zero crossing, which leads to poor stability of the dimmer switch.
  • a dimming switch comprising: two connection terminals, a switching device, a power supply driving circuit, a voltage stabilizing filter circuit, a control module and an input device,
  • the control end of the switching device is connected to the power supply driving circuit, and the other ends are respectively connected to the two connection terminals;
  • the voltage stabilizing filter circuit is respectively connected to the power supply driving circuit, the control module and the input device, and the voltage stabilizing filter circuit is used for voltage regulation and filtering current flowing through;
  • the power supply driving circuit is further connected to the two connection terminals for obtaining electric energy from the two connection terminals, and supplying power to the control module and the input device through the voltage stabilization filter circuit;
  • the input device is further connected to the control module, and the input device is configured to send a control signal to the control module in response to a user input;
  • the control module is configured to generate, according to the control signal and the corresponding preset encoding protocol, a dimming signal including a high and a low level, and send the signal to the power supply driving circuit;
  • the power supply driving circuit is configured to switch the switching of the switching device in response to a high level and a low level in the dimming signal
  • the power supply driving circuit turns off a connection path with the voltage stabilization filter circuit at least during a period in which the received dimming signal is at a low level.
  • control module is further configured to send a buck signal to the power supply driving circuit during at least a low level signal in the transmit dimming signal, wherein the power supply driving circuit is configured to respond to the buck signal
  • the connection path with the voltage stabilizing filter circuit is turned off.
  • the power supply driving circuit is configured to turn off a connection path with the voltage stabilization filter circuit in response to a feedback voltage of its own output.
  • the power supply driving circuit is configured to turn off a connection path with the voltage stabilization filter circuit in response to a low level signal in the dimming signal.
  • the power supply driving circuit includes: a switch driving circuit, an open state power supply circuit, and an off state power supply circuit.
  • the switch driving circuit is respectively connected to two connection terminals, a control end of the switching device, and the control module;
  • the on-state power supply circuit is respectively connected to the switch drive circuit and the voltage stabilization filter circuit;
  • the off-state power supply circuit is respectively connected to the switch driving circuit, the voltage stabilizing filter circuit and the control module;
  • the switch driving circuit is configured to convert alternating current between the two connection terminals into direct current, and to switch on and off of the switching device in response to high and low levels in the dimming signal;
  • the on-state power supply circuit is configured to supply power to the voltage stabilization filter circuit by using a direct current output by the switch driving circuit;
  • the off-state power supply circuit is configured to connect the switch driving circuit and the voltage stabilizing filter circuit after power-on, and is further configured to turn off a connection path with the voltage stabilizing filter circuit in response to the buck signal.
  • the off-state power supply circuit includes: a resistor R4, a resistor R7, a resistor R10, a triode Q1, a triode Q2, a triode Q3, and a Zener diode Z1.
  • the two ends of the resistor R4 are respectively connected to the switch driving circuit and the collector of the transistor Q1, and the emitter of the transistor Q1 is connected to the voltage stabilizing filter circuit.
  • the two ends of the resistor R7 are respectively connected to the switch driving circuit and the base of the transistor Q2, the collector of the transistor Q2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q2 is The base connection of the transistor Q1,
  • the cathode of the Zener diode Z1 is connected to the base of the transistor Q2, and the anode is grounded.
  • the collector of the transistor Q3 is connected to the base of the transistor Q2, the emitter of the transistor Q3 is grounded, and the base of the transistor Q3 is connected to the control module via a resistor R10.
  • the switch driving circuit includes: a resistor R1, a resistor R2, a resistor R6, a resistor R8, a resistor R9, a rectifier bridge B1, and a unidirectional thyristor SCR1.
  • the open state power supply circuit comprises: a resistor R3, a resistor R5, a diode D1, a Zener diode Z2, and a unidirectional thyristor SCR2,
  • the two AC input ends of the rectifier bridge B1 are respectively connected to the two connection terminals through the resistor R1 and the resistor R2.
  • Two ends of the resistor R6 are respectively connected to the switching device and an AC input end of the rectifier bridge B1.
  • the positive output end of the rectifier bridge B1 is connected to the off-state power supply circuit
  • An anode of the unidirectional thyristor SCR1 is connected to a positive output end of the rectifier bridge B1, and a cathode of the unidirectional thyristor SCR1 is connected to an anode of the unidirectional thyristor SCR2, the unidirectional The control electrode of the silicon-controlled SCR1 is grounded through the resistor R8, and the control electrode of the unidirectional thyristor SCR1 is further connected to the control module through the resistor R9.
  • a cathode of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1, and a control pole of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1 through the resistor R5.
  • the two ends of the resistor R3 are respectively connected to the anode of the unidirectional thyristor SCR2 and the negative input end of the rectifier bridge B1.
  • the anode of the diode D1 is connected to the anode of the unidirectional thyristor SCR2 and the cathode of the Zener diode Z2, and the cathode of the diode D1 is connected to the voltage stabilization filter circuit.
  • the anode of the Zener diode Z2 is connected to the control pole of the unidirectional thyristor SCR2,
  • the negative output terminal of the rectifier bridge B1 is grounded.
  • the power supply driving circuit includes: a switch driving circuit, an open state power supply circuit, and an off state power supply circuit.
  • the switch driving circuit is respectively connected to two connection terminals, a control end of the switching device, and the control module;
  • the on-state power supply circuit is respectively connected to the switch drive circuit and the voltage stabilization filter circuit;
  • the off-state power supply circuit and the switch drive circuit and the voltage stabilization filter circuit are The off-state power supply circuit and the switch drive circuit and the voltage stabilization filter circuit;
  • the switch driving circuit is configured to convert alternating current between the two connection terminals into direct current, and to switch on and off of the switching device in response to high and low levels in the dimming signal;
  • the on-state power supply circuit is configured to supply power to the voltage stabilization filter circuit by using a direct current output by the switch driving circuit;
  • the off-state power supply circuit is configured to connect the switch driving circuit and the voltage stabilizing filter circuit after power-on, and turn off a connection path with the voltage stabilizing filter circuit based on a voltage feedback of the output end thereof.
  • the off-state power supply circuit includes: a resistor R4, a resistor R7, a resistor R10, a triode Q1, a triode Q2, a triode Q3, a Zener diode Z1, and a Zener diode Z3.
  • the two ends of the resistor R4 are respectively connected to the switch driving circuit and the collector of the transistor Q1, and the emitter of the transistor Q1 is connected to the voltage stabilizing filter circuit.
  • the two ends of the resistor R7 are respectively connected to the switch driving circuit and the base of the transistor Q2, the collector of the transistor Q2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q2 is The base connection of the transistor Q1,
  • the cathode of the Zener diode Z1 is connected to the base of the transistor Q2, and the anode is grounded.
  • the collector of the transistor Q3 is connected to the base of the transistor Q2, and the emitter of the transistor Q3 is grounded.
  • the base of the Zener diode Q3 is connected to the anode of the Zener diode Z3, and the cathode of the Zener diode Z3 is connected to the emitter of the transistor Q1 via a resistor R10.
  • the switch driving circuit includes: a resistor R1, a resistor R2, a resistor R6, a resistor R8, a resistor R9, a rectifier bridge B1, and a unidirectional thyristor SCR1.
  • the open state power supply circuit comprises: a resistor R3, a resistor R5, a diode D1, a Zener diode Z2, and a unidirectional thyristor SCR2,
  • the two AC input ends of the rectifier bridge B1 are respectively connected to the two connection terminals through the resistor R1 and the resistor R2.
  • Two ends of the resistor R6 are respectively connected to the switching device and an AC input end of the rectifier bridge B1.
  • the positive output end of the rectifier bridge B1 is connected to the off-state power supply circuit
  • An anode of the unidirectional thyristor SCR1 is connected to a positive output end of the rectifier bridge B1, and a cathode of the unidirectional thyristor SCR1 is connected to an anode of the unidirectional thyristor SCR2, the unidirectional The control electrode of the silicon-controlled SCR1 is grounded through the resistor R8, and the control electrode of the unidirectional thyristor SCR1 is further connected to the control module through the resistor R9.
  • a cathode of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1, and a control pole of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1 through the resistor R5.
  • the two ends of the resistor R3 are respectively connected to the anode of the unidirectional thyristor SCR2 and the negative input end of the rectifier bridge B1.
  • the anode of the diode D1 is connected to the anode of the unidirectional thyristor SCR2 and the cathode of the Zener diode Z2, and the cathode of the diode D1 is connected to the voltage stabilization filter circuit.
  • the anode of the Zener diode Z2 is connected to the control pole of the unidirectional thyristor SCR2,
  • the negative output terminal of the rectifier bridge B1 is grounded.
  • the power supply driving circuit includes: a switch driving circuit and an open state power supply circuit,
  • the switch driving circuit is respectively connected to two connection terminals, a control end of the switching device, an open state power supply circuit, and the control module;
  • the on-state power supply circuit is respectively connected to the switch drive circuit and the voltage stabilization filter circuit;
  • the switch driving circuit is configured to convert alternating current between the two connection terminals into direct current, and to switch on and off of the switching device in response to high and low levels in the dimming signal;
  • the on-state power supply circuit is configured to supply power to the voltage stabilization filter circuit by using a direct current output by the switch driving circuit;
  • the switch driving circuit is further configured to communicate with the on-state power supply circuit after power-on, and turn off a connection path with the open state power supply circuit in response to a low level signal in the dimming signal.
  • the power supply driving circuit includes: a resistor R1, a resistor R2, a resistor R6, a resistor R8, a resistor R9, a rectifier bridge B1, a unidirectional thyristor SCR1, a resistor R3, a resistor R5, a diode D1, and a voltage regulator.
  • the two AC input ends of the rectifier bridge B1 are respectively connected to the two connection terminals through the resistor R1 and the resistor R2.
  • Two ends of the resistor R6 are respectively connected to the switching device and an AC input end of the rectifier bridge B1.
  • the positive output end of the rectifier bridge B1 is connected to the off-state power supply circuit
  • An anode of the unidirectional thyristor SCR1 is connected to a positive output end of the rectifier bridge B1, and a cathode of the unidirectional thyristor SCR1 is connected to an anode of the unidirectional thyristor SCR2, the unidirectional The gate of the silicon controlled SCR1 is grounded through the resistor R8.
  • the two ends of the resistor R9 are respectively connected to the control pole of the unidirectional thyristor SCR1 and the positive output end of the rectifier bridge B1.
  • the control pole of the unidirectional thyristor SCR1 is also connected to the control module.
  • a cathode of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1, and a control pole of the unidirectional thyristor SCR2 is connected to a negative input end of the rectifier bridge B1 through the resistor R5.
  • the two ends of the resistor R3 are respectively connected to the anode of the unidirectional thyristor SCR2 and the negative input end of the rectifier bridge B1.
  • the anode of the diode D1 is connected to the anode of the unidirectional thyristor SCR2 and the cathode of the Zener diode Z2, and the cathode of the diode D1 is connected to the voltage stabilization filter circuit.
  • the anode of the Zener diode Z2 is connected to the control pole of the unidirectional thyristor SCR2,
  • the negative output terminal of the rectifier bridge B1 is grounded.
  • the voltage stabilizing filter circuit comprises: an electrolytic capacitor C1, a ceramic capacitor C2, and a Zener diode U1.
  • An input end of the voltage regulator transistor U1 is connected to the power supply driving module, and an output end of the voltage regulator transistor U1 is respectively connected to the input device and the control module, and the ground level of the voltage regulator transistor U1 is grounded.
  • the anode of the electrolytic capacitor C1 is connected to the input end of the Zener transistor U1, and the cathode of the electrolytic capacitor C1 is grounded.
  • Both ends of the ceramic capacitor C2 are respectively connected to the input end of the Zener diode U1 and the ground.
  • the low-level time length of the dimming signal sent by the control module is greater than half of the mains waveform period.
  • the low-level time length of the dimming signal sent by the control module is greater than 8.34 milliseconds.
  • the low-level time length of the dimming signal sent by the control module is greater than 10 milliseconds.
  • the dimming signal sent by the control module includes two code bits, a first code bit and a second code bit, and the first code bit is composed of a low level and a high level.
  • the second code bit is high.
  • the dimming signal sent by the control module includes a start code bit, and the start code bit contains a low level.
  • the switching element is a triac.
  • the low-level time length of the dimming signal sent by the control module is less than 280 milliseconds.
  • a dimming method wherein the two connection terminals of the dimmer switch of any one of the above is connected in series in a circuit in which the LED lamp is located, the LED lamp comprises: an LED, a decoding circuit and an LED driving circuit.
  • the current in the loop in which the LED lamp is located generates a corresponding high and low level signal based on the on and off of the switching device.
  • the decoding circuit acquires the high and low level signals from the loop current, and decodes the high and low level signals according to a preset decoding protocol to obtain a dimming command.
  • the LED driving circuit adjusts an operating parameter of the LED lamp according to the dimming command.
  • the dimmer switch and the dimming method thereof are configured to disconnect the power supply driving circuit and the voltage stabilizing filter circuit during the low period of the dimming signal by the re-control module, so as to prevent the voltage regulating filter circuit from rising during the period.
  • the voltage between the connection terminals makes the LED lamp have higher decoding accuracy, that is, the above dimmer switch and its dimming method have higher operational stability.
  • the low level time in the dimming signal is greater than half of the mains waveform period to ensure that the low level crosses the zero crossing point, thereby ensuring that the low level is reflected in the light source loop.
  • the low level time in the dimming signal is less than 280 milliseconds to ensure the power supply of the control module and the input device during the transmission of the dimming signal, and to ensure the power supply of the light source during the transmission of the dimming signal.
  • FIG. 1 is a circuit block diagram of a dimmer switch according to a preferred embodiment of the present invention
  • Figure 2 is a schematic diagram showing changes in the waveform of the alternating current
  • FIG. 3 is a schematic diagram of circuit modules of a dimmer switch according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a circuit module of a dimmer switch according to still another preferred embodiment of the present invention.
  • FIG. 1 is a circuit block diagram of a dimmer switch 10 according to a preferred embodiment of the present invention.
  • the dimmer switch 10 includes two connection terminals 101, a switching device 102, a power supply driving circuit 103, a voltage stabilization filter circuit 104, a control module 105, and an input device 106.
  • the switching device 102 is a three-terminal controllable switch, such as a bidirectional thyristor or a triode, a MOS tube, an IGBT, and the like.
  • the control terminal of the switching device 102 is connected to the power supply driving circuit 103, and the other two terminals are respectively connected to the two connection terminals 101.
  • the voltage stabilizing filter circuit 104 is connected to the power supply driving circuit 103, the control module 105, and the input device 106, respectively.
  • the power supply driving circuit 103 is also respectively connected to the two connection terminals 101 for obtaining electric energy from the two connection terminals 101, and supplies power to the control module 105 and the input device 106 through the voltage stabilization filter circuit 104.
  • the regulated filter circuit 104 is used to regulate and filter the current flowing through, and to store electrical energy through the capacitor, and to supply power to the control module 105 and the input device 106 during the power-supply drive circuit 103 to release power during the power-off.
  • the capacitor is a capacitor, and the capacitor device simultaneously functions as a filter and a power storage.
  • the input device 106 is also coupled to the control module 105. Input device 106 is operative to issue control signals to control module 105 in response to user input.
  • the input device 106 can be a knob type varistor device, a touch device, a photosensor or a remote control device, and the like.
  • the control module 105 is configured to generate a dimming signal including a high and low level according to a control signal sent by the input device 106 and a corresponding preset encoding protocol, and send the signal to the power supply driving circuit 103.
  • control module 105 sends a buck signal to the power supply driving circuit 103 at least during the transmission of the low level signal in the dimming signal.
  • the control module 105 is further configured to continuously output a high level to the power supply driving circuit 103 during a period other than the transmission of the dimming signal.
  • the power supply driving circuit 103 is configured to switch on and off of the switching device 102 in response to the high and low levels in the dimming signal, and turn off the voltage stabilizing filter circuit 104 during at least the received dimming signal is low level. Connection path.
  • the power supply driving circuit 103 is configured to turn off the connection path with the voltage stabilization filter circuit 104 in response to the buck signal.
  • the dimming method of the dimming switch 10 is as follows:
  • the dimmer switch 10 is connected in series on the fire line of the loop where the LED lamp 200 is located, and the installation is convenient and quick without changing the original wiring.
  • the LED lamp 200 includes an LED, a decoding circuit, and an LED driving circuit.
  • the user input is received by the input device 106 to generate the control signal.
  • the control signal is converted by the control module 105 into the multi-coded dimming signal.
  • the dimming signal of the multi-code bit is transmitted to the switching device 102 by the power supply driving circuit.
  • On-off switching is performed by the switching device 102 in response to a high level in the dimming signal.
  • the current in the loop in which the LED lamp 200 is located generates a corresponding high and low level signal based on the on and off of the switching device 102.
  • the decoding circuit acquires the high and low level signals from the loop current, and decodes the high and low level signals according to a preset decoding protocol to obtain a dimming command.
  • the LED driving circuit adjusts an operating parameter of the LED lamp 200 according to the dimming command.
  • the operating parameters of the LED lamp 200 include brightness and color temperature.
  • the high and low level signals generated on the hot line can be generated at any time, and are not affected by the zero crossing point, and the driving circuit of the LED lamp 200 does not need to capture the zero crossing point to acquire the high and low level signals, so that the work is performed. more stable.
  • the power supply driving circuit 103 will turn off the connection path with the voltage stabilization filter circuit 104 at least during this period to improve the LED light.
  • the low level recognition accuracy of 200 that is, makes the dimmer switch 10 work more stably.
  • the power supply driving circuit 103 includes a switch driving circuit 131, an on-state power supply circuit 132, and an off-state power supply circuit 133.
  • the switch driving circuit 131 is respectively connected to the two connection terminals 101, the control end of the switching device 102, and the control module 105.
  • the on-state power supply circuit 132 is connected to the switch drive circuit 131 and the voltage stabilization filter circuit 104, respectively.
  • the off-state power supply circuit 133 is connected to the switch drive circuit 131, the voltage stabilization filter circuit 104, and the control module 105, respectively.
  • the switch driving circuit 131 is configured to convert alternating current between the two connection terminals 101 into direct current, and to switch on and off of the switching device in response to high and low levels in the dimming signal.
  • the on-state power supply circuit 132 is configured to supply power to the voltage stabilization filter circuit 104 by using the DC power output by the switch drive circuit 131.
  • the off-state power supply circuit 133 is configured to connect the switch driving circuit 131 and the voltage stabilizing filter circuit 104 after power-on, and is further configured to turn off the voltage-reducing circuit 104 in response to the buck signal. Connect the path.
  • the switching element 102 is a triac CRIAC1.
  • the off-state power supply circuit 131 includes a resistor R4, a resistor R7, a resistor R10, a transistor Q1, a transistor Q2, a transistor Q3, and a Zener diode Z1.
  • Both ends of the resistor R4 are respectively connected to the collectors of the switch driving circuit 131 and the transistor Q1, and the emitter of the transistor Q1 is connected to the voltage stabilizing filter circuit 104.
  • the two ends of the resistor R7 are respectively connected to the bases of the switch driving circuit 131 and the transistor Q2, the collector of the transistor Q2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q2 is The base of the transistor Q1 is connected.
  • the cathode of the Zener diode Z1 is connected to the base of the transistor Q2, and the anode is grounded.
  • the collector of the transistor Q3 is connected to the base of the transistor Q2, the emitter of the transistor Q3 is grounded, and the base of the transistor Q3 is connected to the control module 105 via a resistor R10.
  • the switch driving circuit 131 includes a resistor R1, a resistor R2, a resistor R6, a resistor R8, a resistor R9, a rectifier bridge B1, and a unidirectional thyristor SCR1.
  • the on-state power supply circuit 132 includes a resistor R3, a resistor R5, a diode D1, a Zener diode Z2, and a unidirectional thyristor SCR2.
  • the two AC input ends of the rectifier bridge B1 are respectively connected to the two connection terminals 101 through the resistor R1 and the resistor R2.
  • the two ends of the resistor R6 are respectively connected to the control end of the triac CRIAC1 and an AC input end of the rectifier bridge B1.
  • the positive output terminal of the rectifier bridge B1 is connected to the resistor R4 of the off-state power supply circuit 133.
  • An anode of the unidirectional thyristor SCR1 is connected to a positive output end of the rectifier bridge B1, and a cathode of the unidirectional thyristor SCR1 is connected to an anode of the unidirectional thyristor SCR2, the unidirectional The control electrode of the silicon-controlled SCR1 is grounded via the resistor R8, and the gate of the unidirectional thyristor SCR1 is also connected to the control module 105 via the resistor R9.
  • the cathode of the unidirectional thyristor SCR2 is connected to the negative input terminal of the rectifier bridge B1, and the control pole of the unidirectional thyristor SCR2 is connected to the negative input terminal of the rectifier bridge B1 through the resistor R5.
  • Both ends of the resistor R3 are respectively connected to the anode of the unidirectional thyristor SCR2 and the negative input terminal of the rectifier bridge B1.
  • the anode of the diode D1 is connected to the anode of the unidirectional thyristor SCR2 and the cathode of the Zener diode Z2, and the cathode of the diode D1 is connected to the resistor R4 of the voltage stabilization filter circuit 104.
  • the positive pole of the Zener diode Z2 is connected to the control pole of the unidirectional thyristor SCR2.
  • the negative output terminal of the rectifier bridge B1 is grounded.
  • the voltage stabilizing filter circuit comprises: electrolytic capacitors C1, C4, ceramic capacitors C2, C3 and a voltage regulator transistor U1.
  • the input end of the Zener diode U1 is connected to the power supply driving module, and the output end of the Zener diode U1 is respectively connected to the input device and the control module, and the ground level of the Zener diode U1 is grounded.
  • the positive electrodes of the electrolytic capacitors C1 and C4 are connected to the input terminal of the Zener diode U1, and the negative electrodes of the electrolytic capacitors C1 and C4 are grounded.
  • the positive electrodes of the electrolytic capacitors C1 and C4 are connected to the input terminal of the Zener diode U1, and the negative electrodes of the electrolytic capacitors C1 and C4 are grounded.
  • Both ends of the ceramic capacitors C2 and C3 are respectively connected to the input end of the Zener diode U1 and the ground.
  • the transistor Q2 is turned on based on the Zener diode Z1.
  • the transistor Q1 is turned on based on the conduction of the transistor Q2, and the voltage regulator circuit 104 is connected to the positive output terminal of the rectifier bridge B1, the electrolytic capacitors C1 and C4 are charged, and the input device 106 and the control module 105 are powered up.
  • control module 105 After the control module 105 is powered on, a high level is sent to the base of the transistor Q3 through a pin, and the transistor Q3 is turned on, so that the base of the transistor Q2 is grounded and turned off. After the transistor Q2 is turned off, the transistor Q1 is turned off, and the connection path with the voltage stabilization filter circuit 104 is turned off.
  • the power supply circuit 132 supplies power to the voltage stabilization filter circuit 104. Specifically, after the control module 105 is powered on, the high level is sent to the unidirectional thyristor SCR1, and the unidirectional thyristor SCR1 is turned on, and the unidirectional thyristor SCR2 is turned on based on the voltage across the resistor R3. The presence of the Zener diode Z2, before the voltage at the positive output of the rectifier bridge B1 does not exceed the regulation value of the Zener diode Z2, the Zener diode Z2 is cut off, and the voltage across the resistor R3 cannot be controlled in one direction.
  • the silicon control SCR2 is turned on, at which time the positive output voltage of the rectifier bridge B1 will be charged to the electrolytic capacitors C1 and C4 through the unidirectional thyristor SCR1 and the diode D1.
  • the unidirectional thyristor SCR2 is turned on, and the power supply to the voltage stabilization filter circuit 104 is stopped, and the input device 106 and the control module 105 will rely on the electrolysis.
  • the electrical energy stored by capacitors C1, C4 remains operational.
  • control module 105 After the control module 105 is powered on, it also sends a high level to the unidirectional thyristor SCR1 through another pin, and the unidirectional thyristor SCR1 is turned on, and then the unidirectional thyristor SCR2 is turned on based on the voltage across the resistor R3. At this time, the positive and negative output ends of the rectifier bridge B1 are connected, and the control terminal of the bidirectional thyristor CRIAC1 is turned from a low level to a high level, so that the two connection terminals 101 are connected, and the LED lamp 200 is powered on and emits light. .
  • the output device 106 is a variable resistance knob, and the user rotates the knob to change the voltage output to the control module 105, that is, the aforementioned control command.
  • the control module 105 After detecting the voltage change, the control module 105 generates a square wave signal according to a preset corresponding encoding protocol, that is, the aforementioned dimming signal including a high level and a low level.
  • the control pole of the unidirectional thyristor SCR1 receives the square wave signal, and the unidirectional thyristor SCR1 is turned on during the high level in the square wave signal, and the bidirectional thyristor CRIAC1 is turned on.
  • the unidirectional thyristor SCR1 is turned off, the loop of the positive and negative output ends of the rectifier bridge B1 is turned off, and the switching element 102 is turned off.
  • the voltage stabilizing filter circuit 106 and the power supply driving module 103 The path is turned off.
  • the loop in which the LED lamp 200 is located generates a low level.
  • the switching element 102 is a bidirectional thyristor CRIAC1
  • the bidirectional thyristor CRIAC1 needs to meet two conditions from being turned on to off.
  • the control is extremely low, and secondly, Zero point. Therefore, in order to ensure that the low level in the dimming signal can be reflected in the loop of the LED lamp 200, in the embodiment, the low level time of the dimming signal sent by the control module 105 is greater than the commercial alternating current of the loop where the LED lamp 200 is located. Half of the waveform period.
  • the waveform period is 20ms, then the low-level time in the dimming signal is greater than 10ms.
  • the dimming signal further includes a start code of a low level, and the start code is also greater than 10 milliseconds.
  • FIG. 2 it is a schematic diagram of changes in the waveform of the alternating current. among them:
  • Curve 201 is a 50 Hz alternating current normal waveform with a waveform period of 20 milliseconds.
  • the curve 202 is the waveform of the dimming signal
  • the start code time of the dimming signal is a low level of 13 milliseconds
  • the other code bit period is 23 milliseconds
  • the low level in the code bit is 13 milliseconds.
  • the first code bit and the second code bit are included.
  • the first code bit is 13 milliseconds low plus 10 milliseconds high level
  • the second code bit is 23 milliseconds high level.
  • Curve 203 is the waveform of the loop in which LED lamp 200 corresponds to curve 202.
  • Curve 204 is the waveform acquired by the decoding circuit of LED lamp 200.
  • the start bit is 13 milliseconds low, so the start bit must cross a zero crossing, so that the decoding circuit can detect the start bit.
  • the start bit is the start point of other code bits, and the cycle It is 23 milliseconds.
  • the 13 millisecond low level must also cross a zero crossing point, thereby enabling the decoding circuit to detect the first code bit composed of high and low levels. , the determination is "0", the second code bit is continuous high level, and the decoding circuit determines that it is "0".
  • the dimming command obtained after decoding the dimming signal in FIG. 2 is: 010101. Different dimming signals will be decoded to obtain different dimming commands, such as: 000001, 011111, 011010, 011011, etc.
  • the LED driving circuit of LED lamp 200 can be adjusted according to different dimming commands and corresponding preset driving parameters. LED brightness.
  • Each of the dimming signals except the start code includes at least a high level, in order to avoid a problem that the power-off time is too long caused by a plurality of low-level continuous.
  • the high level is used to ensure that the control unit 103 provides the working power, and also ensures the normal supply of power of the LED lamp 200 to ensure that the LED lamp 200 does not flicker.
  • the power consumption of the chip of the common control module 105 and the power consumption of the common output device 106 are comprehensively analyzed.
  • the low time in the dimming signal is less than 280 milliseconds.
  • FIG. 3 is a circuit diagram of a dimmer switch 20 of another embodiment.
  • the dimmer switch 20 is different from the dimmer switch 10 shown in FIG. 1 in that the dimming switch 20 further includes a Zener diode Z3.
  • the base of the transistor Q3 is connected to the anode of the Zener diode Z3, and the cathode of the Zener diode Z3 is connected to the emitter of the transistor Q1 via a resistor R10.
  • the power supply driving circuit 103 is configured to turn off the connection path with the voltage stabilization filter circuit 104 in response to a feedback voltage outputted by itself. It can be seen that after power-on, when the transistor Q3 and the voltage stabilizing filter circuit 104 will reach a dynamic balance, the voltage feedback of the emitter of the transistor Q1 finally turns on the transistor Q3, and the transistor Q1 is turned off. In other words, the voltage at the input end of the voltage stabilizing filter circuit 104 turns off the transistor Q1, and the input end of the voltage stabilizing filter circuit 104 is only connected to the base of the transistor Q3 and the negative terminal of the diode D1, when the dimming signal is low.
  • the unidirectional thyristor SCR1 is turned off, and the voltage stabilizing filter circuit 104 is equal to the connection circuit with the entire power supply driving circuit 103 being turned off without affecting/lifting the voltage across the two connection terminals 101, thereby making dimming
  • the operation of the switch 20 is more stable.
  • FIG. 4 is a circuit diagram of a dimmer switch 30 of still another embodiment.
  • the difference between the dimmer switch 30 and the dimmer switch 10 shown in FIG. 1 is that the dimming switch 30 eliminates the off-state power supply in FIG. 1 .
  • the control unit of the unidirectional thyristor SCR1 is connected to the control module 105.
  • the two ends of the resistor R9 are respectively connected to the control pole of the unidirectional thyristor SCR1 and the positive output end of the rectifier bridge B1.
  • the power supply driving circuit 103 of the dimmer switch 30 is configured to turn off the connection path with the voltage stabilization filter circuit 104 in response to the low level signal in the dimming signal.
  • the control pole of the unidirectional thyristor SCR1 is turned on based on the voltage on the resistor R8, and the entire loop is connected.
  • the unidirectional thyristor SCR1 The control electrode voltage is pulled low, the unidirectional thyristor SCR1 is turned off, and the entire circuit of the power supply driving module 103 is turned off.
  • the connection circuit of the voltage stabilizing filter module 104 and the power supply driving module 103 is turned off without affecting/lifting.
  • the voltage across the two connection terminals 101 is high, so that the operation of the dimmer switch 30 is more stable.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente invention concerne un commutateur de gradation (10) qui comprend deux bornes de connexion (101), un élément de commutation (102), un circuit d'attaque (103) d'alimentation électrique, un circuit (104) de filtrage et de stabilisation de tension, un module de commande (105) et un dispositif d'entrée (106) ; le circuit d'attaque (103) d'alimentation électrique est utilisé pour fournir de l'énergie pour le module de commande (105) et le dispositif d'entrée (106) par l'intermédiaire du circuit (104) de filtrage et de stabilisation de tension, le dispositif d'entrée (106) est utilisé pour envoyer un signal de commande au module de commande (105), le module de commande (105) est utilisé pour produire un signal de gradation contenant des niveaux faibles et élevés selon le signal de commande, le circuit d'attaque (103) d'alimentation électrique est utilisé pour répondre aux niveaux faibles et élevés dans le signal de gradation pour commuter la marche et l'arrêt de l'élément de commutation (102) et le circuit d'attaque (103) d'alimentation électrique procède au moins à désactiver un chemin de connexion avec le circuit (104) de filtrage et de stabilisation de tension pendant une période pendant laquelle le signal de gradation reçu présente un niveau faible. L'invention concerne également un procédé de gradation permettant d'utiliser le commutateur de gradation (10) susmentionné. Le commutateur de gradation (10) susmentionné est connecté en parallèle à une boucle de source de lumière et il est pratique à installer. Au cours de la période pendant laquelle le signal de gradation a un faible niveau, le circuit (104) de filtrage et de stabilisation de tension est déconnecté du circuit d'attaque (103) d'alimentation électrique, sans influencer la tension entre deux bornes de connexion (101), de sorte que la stabilité de fonctionnement du commutateur de gradation (10) et le procédé soient améliorés.
PCT/CN2014/078930 2014-05-30 2014-05-30 Commutateur de gradation et procédé de gradation associé WO2015180136A1 (fr)

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CN109831845A (zh) * 2018-12-27 2019-05-31 中山市夸克光电科技有限公司 一种多功能led感应灯控制器
CN110113842A (zh) * 2019-05-21 2019-08-09 江苏宜美照明科技股份有限公司 环境光感应控制灯具开关电路
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CN113411931A (zh) * 2021-05-06 2021-09-17 上海奥简微电子科技有限公司 Led可控硅调光快速响应电路及led照明装置

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CN107567136A (zh) * 2017-09-08 2018-01-09 深圳市豪恩光电照明股份有限公司 一种led调光调色电路及led调光调色装置
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CN109168227A (zh) * 2018-10-25 2019-01-08 上海联矽智能科技有限公司 一种隐藏式一体化智能光控系统及实现方法
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CN110113842A (zh) * 2019-05-21 2019-08-09 江苏宜美照明科技股份有限公司 环境光感应控制灯具开关电路
CN110113842B (zh) * 2019-05-21 2024-03-05 江苏宜美照明科技股份有限公司 环境光感应控制灯具开关电路
CN113300593A (zh) * 2021-04-20 2021-08-24 辽宁长风科技有限责任公司 一种用于随钻仪器的直流稳压电源系统
CN113411931A (zh) * 2021-05-06 2021-09-17 上海奥简微电子科技有限公司 Led可控硅调光快速响应电路及led照明装置
CN113411931B (zh) * 2021-05-06 2024-01-26 上海奥简微电子科技有限公司 Led可控硅调光快速响应电路及led照明装置

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