CN108601177B

CN108601177B - Single-in single-out touch phase-cut dimming controller

Info

Publication number: CN108601177B
Application number: CN201810475809.8A
Authority: CN
Inventors: 郑德华; 陈耿圳
Original assignee: Zhuhai Shengchang Electronics Co ltd
Current assignee: Zhuhai Shengchang Electronics Co ltd
Priority date: 2018-05-17
Filing date: 2018-05-17
Publication date: 2024-04-09
Anticipated expiration: 2038-05-17
Also published as: CN108601177A

Abstract

The invention discloses and provides a single-in single-out touch phase-cut dimming controller which comprises an alternating current input terminal (P1), a dimming output terminal (P2), a piezoresistor (RV 1), a rectifier (DB 1), a diode (D1), an IGBT tube (Q1), a resistor (R1), a sampling circuit, a power supply circuit, a driving circuit, a singlechip processor, a touch circuit, an overcurrent protection circuit and a brightness regulator, wherein each unit circuit comprises various electronic elements, and each element is correspondingly and adaptively connected according to the circuit design function requirement. The invention solves the problem that the phase-cut dimmer cannot absorb too much current to the control circuit when in single-in and single-out, and also ensures that the overall power consumption is lower, the compatibility is stronger, and the engineering wiring is simpler and more convenient. The touch is used as a carrier, so that the touch device is not limited by mechanical service life, has functions of soft start, overcurrent protection, current limiting protection and the like, and brings a new height to the technical field of phase-cut dimming.

Description

Single-in single-out touch phase-cut dimming controller

Technical Field

The invention relates to the technical field of light source dimming, in particular to a single-in single-out touch phase-cut dimming controller.

Background

With the rise of global commercial lighting market, more and more novel phase-cut dimmer products enter the household appliance lighting industry, and the silicon controlled rectifier phase-cut dimmer occupies a large dimming market in the household appliance lighting industry by virtue of the advantages of the silicon controlled rectifier phase-cut dimmer. However, the traditional phase-cut light modulator adopts a mechanical knob to modulate light, is limited by mechanical service life, is inconvenient to use, is unsightly in appearance and is easy to damage during transportation. And most dimmers are dual in and dual out, two LN line inputs, and two LN line outputs. Because the double-in and double-out scheme is adopted, the traditional switch cannot be directly replaced, the power consumption of the whole machine is high, the complicated wiring inconvenience exists in engineering, and the labor cost and the material cost are greatly increased. By adopting a single-in single-out scheme, one alternating-current input line is in, and one dimming output line is out, so that the traditional switch can be directly installed instead of the traditional switch, the power consumption of the whole machine is very low, extra lines are not required to be distributed on the engineering, great convenience is brought to the engineering in actual use, and the labor cost and the material cost are also saved. The difficulty of single-in and single-out is that the phase-cut dimmer cannot draw too much current to the control circuit, otherwise the dimming effect and compatibility will be poor, so that many manufacturers adopt the traditional method of a mechanical knob potentiometer to control dimming, but the traditional method of a mechanical knob potentiometer is adopted to control dimming to limit the mechanical life, if the touch is taken as a carrier, the dimming is not limited to the mechanical life, and the service life is longer than that of the mechanical knob phase-cut dimmer.

Therefore, the development of the single-input single-output touch phase-cut dimming controller has very important significance.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the single-input single-output touch phase-cut dimmer with excellent performance.

The technical scheme of the invention is as follows: the utility model provides a single advance single touch phase cut dimming controller, it includes AC input terminal, the output terminal that adjusts luminance, piezo-resistor, rectifier, diode, IGBT pipe, resistance, sampling circuit, power supply circuit, drive circuit, singlechip treater, touch circuit, overcurrent protection circuit, luminance regulator, AC input terminal with the one end of piezo-resistor is connected, the output terminal that adjusts luminance with the other end of piezo-resistor is connected, AC input terminal with the AC input one end of rectifier is connected, the AC input other end of rectifier with the output terminal that adjusts luminance is connected, the output positive terminal of rectifier with the positive end of diode is connected, the negative terminal of diode respectively with sampling circuit with power supply circuit, the output positive terminal of rectifier with the collecting electrode of IGBT pipe is connected, the projecting pole of IGBT pipe with one end of resistance with overcurrent protection circuit, the other end of resistance with the output negative terminal of rectifier is connected and is connected circuit ground side altogether, power supply circuit respectively with drive circuit, singlechip, overcurrent protection circuit, touch circuit, luminance regulator respectively.

The sampling circuit comprises a capacitor and a plurality of resistors, the power supply circuit comprises a plurality of resistors, a voltage stabilizing diode, an NPN triode, a plurality of capacitors and a power supply chip, the driving circuit comprises a plurality of resistors, capacitors and diodes, the singlechip processor comprises a singlechip, a plurality of capacitors, resistors and a burning interface, the touch circuit comprises a touch chip, a resistor and a plurality of capacitors, the overcurrent protection circuit comprises a plurality of resistors, capacitors and a triode, and the brightness regulator comprises a rotary dial indicator.

The beneficial effects of the invention are as follows: the invention comprises an alternating current input terminal, a dimming output terminal, a piezoresistor, a rectifier, a diode, an IGBT tube, a resistor, a sampling circuit, a power supply circuit, a driving circuit, a singlechip processor, a touch circuit, an overcurrent protection circuit and a brightness regulator, wherein the alternating current input terminal is connected with one end of the piezoresistor, the dimming output terminal is connected with the other end of the piezoresistor, the alternating current input terminal is connected with one end of the alternating current input terminal of the rectifier, the other end of the alternating current input terminal of the rectifier is connected with the dimming output terminal, the positive end of the output of the rectifier is connected with the positive end of the diode, the negative end of the diode is respectively connected with the sampling circuit and the power supply circuit, the positive end of the rectifier is connected with the collector of the IGBT tube, the emitter of the IGBT tube is connected with one end of the resistor and the overcurrent protection circuit, the other end of the resistor is connected with the negative end of the rectifier and the common ground end of the circuit, and the power supply circuit is respectively connected with the driving circuit, the singlechip processor, the touch protection circuit, the overcurrent protection circuit and the brightness regulator. Therefore, the invention solves the problem that the single-in single-out phase-cut dimmer cannot absorb too much current to the control circuit, and also ensures lower overall power consumption, so that the touch phase-cut dimmer has excellent dimming effect in a single-in single-out wiring mode, has stronger compatibility and ensures simpler and more convenient engineering wiring. Compared with the traditional mechanical knob potentiometer, the touch dimming scheme well solves the limitation of the service life of the mechanical switch, so that the service life of the phase-cut dimmer is longer, and the appearance of the dimmer is more novel and attractive. And soft start dimming enables the dimming effect to be smoother and more stable, and the soft start dimming device has an adjustable minimum brightness gear, so that the problem that initial brightness is different due to different power supplies can be solved. And has the functions of overcurrent protection, current limiting protection and the like.

Drawings

Fig. 1 is a block diagram of a single-in single-out touch phase-cut dimmer according to the present invention.

Fig. 2 is a schematic circuit diagram of a single-in single-out touch phase-cut dimmer of the present invention.

Detailed Description

As shown in fig. 1 and 2, the invention comprises an alternating current input terminal P1, a dimming output terminal P2, a piezoresistor RV1, a rectifier DB1, a diode D1, an IGBT tube Q1, a resistor R1, a sampling circuit 101, a power supply circuit 201, a driving circuit 301, a single chip processor 401, a touch circuit 501, an overcurrent protection circuit 601 and a brightness regulator 701, wherein the alternating current input terminal P1 is connected with one end of the piezoresistor RV1, the dimming output terminal P2 is connected with the other end of the piezoresistor RV1, the alternating current input terminal P1 is connected with an alternating current input end of the rectifier DB1, the alternating current input other end of the rectifier DB1 is connected with the dimming output terminal P2, the output positive end of the rectifier DB1 is connected with the positive end of the diode D1, the negative terminal of the diode D1 is connected to the sampling circuit 101 and the power supply circuit 201, the positive terminal of the output of the rectifier DB1 is connected to the collector of the IGBT tube Q1, the emitter of the IGBT tube Q1 is connected to one end of the resistor R1 and the over-current protection circuit 601, the other end of the resistor R1 is connected to the negative terminal of the output of the rectifier DB1 and is connected to a circuit common ground terminal, the power supply circuit 201 is connected to the driving circuit 301, the singlechip processor 401, the touch circuit 501, and the over-current protection circuit 601, and the singlechip processor 401 is connected to the sampling circuit 101, the driving circuit 301, the touch circuit 501, the over-current protection circuit 601, and the brightness adjuster 701.

The sampling circuit 101 includes a capacitor C11, a plurality of resistors R16 and R17, the power supply circuit 201 includes a plurality of resistors R2, R3, R4, R5, R6, a zener diode Z1, an NPN triode Q2, an NPN triode Q3, a plurality of capacitors C1, C2, C3, C4, and a power supply chip U3, the driving circuit 301 includes a plurality of resistors R7, R8, a capacitor C8, and a diode D2, the singlechip processor 401 includes a singlechip U1, a plurality of capacitors C10, C12, C13, a resistor R18, and a programming interface J1, the touch circuit 501 includes a touch chip U2, a resistor R10, a plurality of capacitors C5, C6, and C7, the overcurrent protection circuit 601 includes a plurality of resistors R9, R13, R14, R15, a capacitor C9, and an NPN triode Q4, and the brightness adjuster includes a rotary dialer VRS 701, and the elements in the above unit circuits are correspondingly connected according to the design function requirements of the circuit.

In this embodiment, a single-in single-out scheme is adopted, an ac input line is in, and a dimming output line is out, so that the switch can be directly installed to replace the traditional switch, the power consumption of the whole machine is very low, extra lines are not required to be distributed in engineering, great convenience is brought to engineering in actual use, and labor cost and material cost are also saved. The difficulty of single-in and single-out is that the phase-cut dimmer cannot draw too much current to the control circuit, otherwise the dimming effect and compatibility will be poor, so that many manufacturers adopt the traditional method of a mechanical knob potentiometer to control dimming. The invention uses an excellent power supply circuit and a touch scheme with extremely low power consumption, so that the traditional mechanical knob potentiometer is omitted, and touch dimming is adopted. The touch is used as a carrier, so that the touch is not limited by the mechanical service life, and the service life of the touch-sensitive light modulator is longer than that of a mechanical knob phase-cut light modulator. And also has the functions of soft start, overcurrent protection, current limiting protection and the like. The invention breaks through the bottleneck of the traditional phase-cut light modulator and brings a new height to the phase-cut light modulation field.

The rectifier DB1 rectifies a negative half cycle of an ac input voltage into a positive half cycle, and transmits the rectified ac voltage to the power supply circuit 201 through the diode D1 as a power input of the power supply circuit 201; the power supply circuit 201 converts the rectified alternating voltage into direct voltage to supply power to the system; the touch circuit 501 transmits the sensed touch signal to a detection port of the single-chip processor 401; the sampling circuit 101 also samples the rectified synchronous zero-crossing signal and transmits the synchronous zero-crossing signal to an interrupt port of the singlechip processor 401; after the singlechip processor 401 judges zero crossing, the amplitude of the touch signal transmitted by the touch circuit 501 is detected to be converted into the amplitude of the duty ratio of the pulse width PWM signal; the pulse width PWM signal drives the gate of the IGBT tube Q1 to phase-cut through the driving circuit 301, and the voltage after phase-cut passes through the resistor R1 and then is rectified by the rectifier DB1 to output a dimming signal; meanwhile, the over-current protection circuit 601 detects a voltage drop signal on R1, feeds back the voltage drop signal to the ADC port of the single-chip processor 401, detects whether the voltage exceeds a set voltage to cause over-current, and once the over-current is detected, the single-chip processor 401 turns off the driving signal of the IGBT tube Q1. The brightness regulator 701 has 0-9 gears in total, and the rotation of different gears can change the duty ratio of the minimum pulse width PWM signal output by the singlechip processor.

In this embodiment, the voltage dependent resistor RV1 is connected to the two ends of the ac input terminal P1 and the dimming output terminal P2 to prevent the surge voltage from damaging the dimmer; after receiving the ac input voltage, the ac input terminal P1 rectifies the negative half cycle of the ac input voltage into the positive half cycle through the rectifier DB1, rectifies the ac input voltage again through the diode D1, and transmits the rectified ac input voltage to the power supply circuit 201; a linear voltage stabilizing circuit is formed by a resistor R2, a resistor R3, a resistor R4, a resistor R5, a voltage stabilizing diode Z1 and an NPN triode Q2 of the power supply circuit 201, the rectified voltage is reduced, and then voltage input is provided for the 1 st pin and the 3 rd pin of the power supply chip U3 after the voltage is filtered by a capacitor C3 and a capacitor C4; after receiving the input voltage, the power chip U3 steps down the received voltage again, and the power chip U3 supplies power to the system after the 5 th pin of the power chip U3 is filtered by the capacitor C1 and the capacitor C2; the NPN triode Q3 and the resistor R6 form a current-limiting protection circuit, and when the voltage drop of the two ends of the R6 reaches the BE voltage drop of the NPN triode Q3, the NPN triode Q3 is conducted to limit the current; the touch circuit 501 is composed of a touch chip U2, a resistor R10, a capacitor C5, a capacitor C6 and a capacitor C7; when a human body touches the sensing disc, a 6 th pin of the touch chip U2 senses a signal, and data is transmitted to a 6 th pin and a 5 th pin of the singlechip U1 through a 1 st pin and a 3 rd pin of the touch chip U2 through internal processing; after receiving the data, the singlechip U1 judges that the sampling resistor R16, the resistor R17 and the capacitor C11 in the sampling circuit 101 perform partial pressure filtering and sample the zero crossing synchronous signal to detect; after detecting zero crossing, the interrupt port of the 3 rd pin of the single chip microcomputer U1 outputs a pulse width PWM signal to the driving circuit 301 through the 1 st pin of the single chip microcomputer U1; when the single chip microcomputer is started each time, the single chip microcomputer outputs a soft start pulse width PWM signal to prevent overshoot of dimming output; in the singlechip processor 401, the resistor R18 and the capacitor C12 are used as a reset circuit of the singlechip U1. And the capacitor C10 and the capacitor C13 are used as a power supply input by the singlechip U1 for filtering. The burning interface J1 is used as a burning port of the singlechip program; the driving circuit 301 filters interference clutter from a pulse width PWM signal output by the 1 st pin of the singlechip U1 by a resistor R8 and a capacitor C8, and clamps a diode D2 to protect an IGBT tube Q1; after the grid electrode of the IGBT tube Q1 receives the pulse width PWM signal, the waveform rectified by the rectifier DB1 is subjected to phase-cut dimming; the voltage after phase-cut dimming is output by the emitter of the IGBT tube Q1 and is transmitted to the rectifier DB1 for rectification through the resistor R1; the rectifier DB1 rectifies and then transmits the dimming voltage to the dimming output terminal P2; meanwhile, the load current forms a voltage drop signal on the resistor R1, and the voltage drop signal is transmitted to the overcurrent protection circuit 601; the resistor R15 in the overcurrent protection circuit 601 and the capacitor C9 are filtered and then transferred to the base electrode of the NPN triode Q4; NPN triode Q4, resistance R9, resistance R13, resistance R14 constitute signal amplification circuit, and the voltage drop signal after the filtering is amplified, and the ADC port that conveys singlechip U3 to the 3 rd foot detects whether surpasses its voltage of setting. Once the voltage exceeding the set voltage is detected, the singlechip U1 is used for closing and outputting a pulse width PWM signal, so that the fault protection function is realized. The 1 st, 2 nd, 4 th and 8 th pins of the rotary dial VRS in the brightness adjuster 701 are respectively connected with the 14 th, 15 th, 16 th and 17 th pins of the single chip microcomputer U1. The number of the rotational dialer VRS is 0-9, and the initial pulse width PWM signal duty ratio output by the singlechip U3 can be changed by adjusting the rotational dialer VRS to different gears, namely the minimum brightness when the singlechip is just started, so that the requirements of different clients on the minimum brightness are met. In some embodiments, a rotary dial VRS may not be required. Or the voltage value after the voltage division can be acquired by the singlechip through voltage division by the adjustable resistor, and the ADC conversion is carried out to realize the change of different brightness. The above examples are only preferred embodiments of the present invention, not the only embodiments, and are not limited to the above examples, and should be included in the scope of the present invention as long as the technical effects of the present invention are achieved by any same or similar means.

The embodiment of the invention has the advantages that: the single-in and single-out wiring mode saves a lot of time and cost for practical engineering application. The touch dimmer has good dimming effect and compatibility in a single-in and single-out wiring mode by using the power supply circuit with stable and reliable design, can adjust the minimum brightness, meets the requirements of different customers on the minimum brightness, and is provided with the overcurrent current limiting protection circuit, so that the dimmer can work stably and reliably.

In view of the foregoing, it will be evident to a person skilled in the art that numerous modifications of the invention as described herein are possible without departing from the broader principles of the invention.

Claims

1. The utility model provides a single advance single touch phase cut dimming controller which characterized in that: the LED light source comprises an alternating current input terminal P1, a dimming output terminal P2, a piezoresistor RV1, a rectifier DB1, a diode D1, an IGBT tube Q1, a resistor R1, a sampling circuit (101), a power supply circuit (201), a driving circuit (301), a singlechip processor (401), a touch circuit (501), an overcurrent protection circuit (601) and a brightness regulator (701), wherein the alternating current input terminal P1 is connected with one end of the piezoresistor RV1, the dimming output terminal P2 is connected with the other end of the piezoresistor RV1, the alternating current input terminal P1 is connected with one alternating current input end of the rectifier DB1, the alternating current input other end of the rectifier DB1 is connected with the dimming output terminal P2, the positive end of the output of the rectifier DB1 is connected with the positive end of the diode D1, the negative end of the diode D1 is connected with the sampling circuit (101) and the power supply circuit (201), the positive end of the output positive end of the diode D1 is connected with the collector of the IGBT tube Q1, the output positive end of the IGBT tube DB1 is connected with the collector electrode of the IGBT tube Q1, the R1 is connected with the resistor R1 and the positive end of the driving circuit (301), the negative end of the diode D1 is connected with the collector electrode of the singlechip processor (301), the collector electrode of the diode D1 and the collector electrode is connected with the collector electrode of the diode (201), the collector electrode of the collector electrode is connected with the collector electrode of the collector circuit (101), the collector electrode of the collector electrode is connected with the collector electrode of the collector electrode) and the collector electrode of the collector electrode, and the collector electrode of the collector electrode The touch circuit (501), the overcurrent protection circuit (601) and the brightness adjuster (701) are connected; the sampling circuit 101 comprises a capacitor C11, a plurality of resistors R16 and R17, the power supply circuit 201 comprises a plurality of resistors R2, R3, R4, R5 and R6, a voltage stabilizing diode Z1, an NPN triode Q2, an NPN triode Q3, a plurality of capacitors C1, C2, C3, C4 and a power chip U3, the driving circuit (301) comprises a plurality of resistors R7, R8, a capacitor C8 and a diode D2, the singlechip processor (401) comprises a singlechip U1, a plurality of capacitors C10, C12, C13, a resistor R18 and a burning interface J1, the touch circuit (501) comprises a touch chip U2, a resistor R10, a plurality of capacitors C5, C6 and C7, the overcurrent protection circuit (601) comprises a plurality of resistors R9, R13, R14, R15, a capacitor C9 and an NPN triode Q4, the brightness regulator (701) comprises a rotary code shifter (VRS), and the rotary code shifter (VRS) is correspondingly connected with each circuit in a corresponding circuit according to the requirements of a circuit design.