CN213152419U

CN213152419U - Intelligent drive circuit based on WIFI wireless control

Info

Publication number: CN213152419U
Application number: CN202021981364.XU
Authority: CN
Inventors: 程厚明; 徐友平
Original assignee: Letaron Electronic Co ltd
Current assignee: Guangdong Qingzhou Photoelectric Technology Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-05-07
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses an intelligence drive circuit based on WIFI wireless control, alternating current power supply is through preceding stage EMI filter circuit, rectifier circuit output direct current, the direct current is through the transformer circuit output, then through back filter circuit to output circuit output voltage, transformer circuit's vice primary loop and PFC control circuit's feedback end electric connection, PFC control circuit passes through the break-make of switch tube control transformer circuit's main primary loop, transformer circuit provides starting voltage to PFC control circuit, there is polarity electric capacity in transformer circuit's vice primary loop in parallel to realize PFC control circuit's quick start, transformer circuit's main secondary and PFC control circuit realize the feedback through opto-coupler isolation communication connection; the voltage drop circuit drops the voltage into voltage required by the WIFI communication circuit and the control circuit, the WIFI communication circuit is communicated with the upper computer through a wireless network, the control circuit controls the output circuit according to the control instruction, and the output circuit drives the load. The utility model discloses simple and the good reliability.

Description

Intelligent drive circuit based on WIFI wireless control

Technical Field

The utility model relates to a LED lamps and lanterns drive control technical field, especially an intelligent drive circuit based on WIFI wireless control.

Background

With the development of science and technology, more and more intelligent products enter our lives, and the aspect of the LED lamp is no exception. The LED lamp has the advantages of long service life, high efficiency, safety, environmental protection, small volume, high response speed and the like, and the driving, dimming and color temperature adjustment of the LED are the research hotspots in recent years under the continuous development of the manufacturing process. This group has carried out intensive research in this respect to a section has developed the accessible cell-phone APP under the wiFi technique and has carried out multi-functional intelligent drive such as adjust luminance mixing of colors temperature multi-scene setting and regularly close opening and speech control to LED lamps and lanterns. The traditional LED drive needs to be externally connected with a switch controller so as to achieve the functions of light modulation, color temperature modulation and the like, the occupied space is large, the size is large, and most of light-on control is wired control.

Disclosure of Invention

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, a intelligence drive circuit based on WIFI wireless control is provided.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: the utility model provides an intelligence drive circuit based on WIFI wireless control, it includes the power supply part: preceding stage EMI filter circuit, rectifier circuit, vary voltage circuit, PFC control circuit, back stage filter circuit, output circuit to and control section: the WIFI communication circuit comprises a WIFI communication circuit, a control circuit and a voltage drop circuit; the alternating current power supply sequentially achieves filtering and rectification to output direct current through the front-stage EMI filter circuit and the rectifier circuit, the direct current is converted and output from a main primary circuit to a secondary circuit of the transformer circuit, then load working voltage is output to the output circuit through the rear-stage filter circuit, an auxiliary primary circuit of the transformer circuit is electrically connected with a feedback end of the PFC control circuit, the PFC control circuit controls the on-off of the main primary circuit of the transformer circuit through a switch tube Q1, the auxiliary primary circuit of the transformer circuit provides starting voltage for the PFC control circuit, a polar capacitor C17 is connected in parallel to the auxiliary primary circuit of the transformer circuit to achieve rapid starting of the PFC control circuit, and a main secondary stage of the transformer circuit is connected with an optical coupling receiving end U1B of the PFC control circuit through an optical coupling transmitting end U1A to achieve feedback of secondary output voltage of the transformer circuit through optical coupling isolation communication; the voltage drop circuit drops the load working voltage into the working voltage required by the WIFI communication circuit and the control circuit, the WIFI communication circuit is in communication connection with the upper computer through a wireless network, the control circuit controls the output circuit according to a control instruction received from the WIFI communication circuit, and the output circuit drives the load.

In the above technical solution, an LR parallel circuit is electrically connected between the preceding stage EMI filter circuit and the rectifier circuit.

In the above technical solution, the IO port of the PFC control circuit is electrically connected to the control end of the switching tube Q1 after being connected in series with the resistors R9 and R10, and the resistor R10 is connected in parallel with the diode D1 in reverse connection.

In the above technical solution, the secondary of the transformer circuit is connected in series with two zener diodes D4 connected in parallel, and the zener diode D4 is connected in parallel with an RC series circuit.

In the above technical scheme, the output circuit includes a switching tube, a control end of the switching tube is electrically connected with a PWM output end of the control circuit, and an input end of the switching tube is supplied with power by a load working voltage.

In the above technical scheme, the positive terminal of the capacitor C17 is electrically connected with the input terminal of the optocoupler receiving terminal U1B after being connected with the resistor R8 in series, one path of the output terminal of the optocoupler receiving terminal U1B is electrically connected with the feedback terminal of the PFC control circuit through the current limiting resistor R29, and the other path of the output terminal of the optocoupler receiving terminal U1B is electrically connected with the secondary primary circuit of the transformer circuit after being connected with the zener diode.

In the technical scheme, a secondary output end of the voltage transformation circuit is electrically connected with an input end of an optocoupler transmitting end U1A after being connected with a diode and a resistor in series, an input end of the optocoupler transmitting end U1A is also electrically connected with a filter circuit with RC connected in parallel, and an output end of the optocoupler transmitting end U1A is connected with a resistor R7 and an adjustable reference voltage source in series; the reference electrode of the adjustable reference voltage source is electrically connected with the secondary output end of the transformation circuit after being connected with a resistor R35 in series, a resistor is connected between the reference electrode and the anode in parallel, a capacitor C16 and a resistor R34 which are connected in series are connected between the reference electrode and the cathode in parallel, and the cathode is electrically connected with the output end of the optocoupler emitting end U1A through the resistor R7.

In the above technical scheme, the front end of the preceding stage EMI filter circuit is connected in parallel with a voltage dependent resistor VR1, and the output end of the rectifier circuit is connected in parallel with a voltage dependent resistor VR 2.

In the above technical solution, the output end of the voltage drop circuit is connected in series with the inductor L1 and the magnetic bead FB1 to supply power to the control circuit.

The utility model has the advantages that: holistic circuit structural design is simple and the good reliability, has low-voltage, high efficiency, the volume is less (do not need external antenna), extensive applicability, wireless control (but through cell-phone APP remote control), supports the colour temperature of adjusting luminance, and the STM8S003F3 chip that adopts through control circuit has regularly opens the function of closing, multi-scene setting, artificial intelligence pronunciation etc..

Drawings

Fig. 1 is a schematic diagram of the circuit principle of color temperature adjustment of the present invention.

Fig. 2 is a schematic diagram of the circuit principle of the light modulation of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, an intelligent driving circuit based on WIFI wireless control includes a power supply portion: preceding stage EMI filter circuit, rectifier circuit, vary voltage circuit, PFC control circuit, back stage filter circuit, output circuit to and control section: the WIFI communication circuit comprises a WIFI communication circuit, a control circuit and a voltage drop circuit; an alternating current power supply L/N sequentially achieves filtering and rectification to output direct current through a front-stage EMI filter circuit and a rectification circuit, the direct current is converted and output from a main primary circuit to a secondary circuit through a voltage transformation circuit, then load working voltage is output to an output circuit through a rear-stage filter circuit, an auxiliary primary circuit of the voltage transformation circuit is electrically connected with a feedback end of a PFC control circuit, the PFC control circuit controls the on-off of the main primary circuit of the voltage transformation circuit through a switch tube Q1, the auxiliary primary circuit of the voltage transformation circuit provides starting voltage for the PFC control circuit, a polar capacitor C17 is connected in parallel to the auxiliary primary circuit of the voltage transformation circuit to achieve rapid starting of the PFC control circuit, and the main secondary circuit of the voltage transformation circuit is connected with an optical coupling receiving end U1B of the PFC control circuit through optical coupling isolation communication through an optical coupling transmitting end U1A to achieve feedback of secondary; the voltage drop circuit drops the load working voltage into the working voltage required by the WIFI communication circuit and the control circuit, the WIFI communication circuit is in communication connection with the upper computer through a wireless network, the control circuit controls the output circuit according to a control instruction received from the WIFI communication circuit, and the output circuit drives the load. The WIFI communication circuit adopts a TYWE3S chip, an external antenna is not needed, and the volume of a product is effectively reduced.

Specifically, the front stage EMI filter circuit uses a common mode inductor LF1, and the rear stage filter circuit also uses a common mode inductor LF 2. The rectifier circuit adopts a rectifier bridge DB1, and a high-impedance resistor R3 and a resistor R40 are connected in parallel between the output of the rectifier bridge DB1 and the input of the transformer T1 to protect a subsequent circuit. An LR parallel circuit is electrically connected between the preceding EMI filter circuit and the rectifying circuit. The LR parallel circuit comprises inductors L1 and L2 and resistors R11 and R5, wherein the inductor L1 is connected with the resistor R11 in parallel, and the inductor L2 and the residual resistor R5 are connected with each other in parallel. The LR parallel circuit provides an inductive current leakage channel, eliminates the influence on a lower circuit and improves the reliability of the circuit.

Specifically, the PFC control circuit includes a PFC control chip U2, which is an SFL320 chip. The SFL320 chip is controlled by a critical conduction mode (CRM), a high-performance analog multiplier is arranged in the chip, and meanwhile, a frequency correction technology and distortion optimization processing are integrated, so that cross-over distortion of input current is reduced, and the PF value is improved. The SFL320 carries out various innovations and improvements aiming at the defects of the traditional single-stage flyback PFC framework, and has the innovative characteristics that a UVLO hysteresis window of more than 7V and 5uA ultralow starting current are achieved, the standby power consumption of a system is greatly reduced, and meanwhile, the system starting failure is prevented. The built-in soft start control and the feedback network zero clearing control reduce the impact of the system current overshoot on the LED lamp beads. A270 KHz highest frequency clamp is built in, and voltage overshoot of a short-circuit power tube is reduced. The IO port of the PFC control circuit is connected with resistors R9 and R10 in series and then is electrically connected with the control end of a switching tube Q1, and the resistor R10 is connected with a reversely connected diode D1 in parallel.

Specifically, the transformer circuit is an ER2518 transformer T1 which is provided with two input primary circuits and an output secondary circuit, and a filter stabilizing circuit consisting of a resistor R18, a resistor R19, a resistor R20, a capacitor C19, a capacitor C5, a capacitor C6 and a reverse diode D2 is connected in parallel to the main primary circuit. The secondary of the transformation circuit is connected in series with two parallel zener diodes D4, and the zener diode D4 is connected in parallel with an RC series circuit. The RC series circuit comprises a capacitor C7, a resistor R21 and a resistor R22, wherein the resistor R21 is connected with the resistor R22 in parallel and then connected with a capacitor C7 in series. The absorption loop formed by connecting the RC resistance-capacitance in series is connected with the diode in parallel, and the effect of the absorption loop is to restrain the influence of reverse peak voltage (surge voltage) on the diode so as to protect the diode from damage caused by voltage resistance.

Specifically, the output circuit comprises a switching tube, a control end of the switching tube is electrically connected with a PWM output end of the control circuit, and an input end of the switching tube is supplied with power by load working voltage. As shown in FIG. 1, the switching tubes Q2-Q6 are electrically connected to the pin header connector J1 and the interfaces CON 1-5, respectively. As shown in FIG. 2, the switch tubes Q2-Q7 are electrically connected to the pin header connector J1 and the interfaces CON 1-6, respectively.

In order to ensure the stability and reliability of optical coupling transmission, the positive terminal of the capacitor C17 is electrically connected with the input end of the optical coupling receiving terminal U1B after being connected with the resistor R8 in series, one path of the output end of the optical coupling receiving terminal U1B is electrically connected with the feedback end of the PFC control circuit through the current-limiting resistor R29, and the other path of the output end of the optical coupling receiving terminal U1B is electrically connected with the secondary primary loop of the transformation circuit after being connected with the voltage-stabilizing diode. The secondary output end of the transformer is connected with a diode and a resistor in series and then is electrically connected with the input end of the optocoupler emitting end U1A, the input end of the optocoupler emitting end U1A is also electrically connected with a filter circuit connected with RC in parallel, and the output end of the optocoupler emitting end U1A is connected with a resistor R7 and an adjustable reference voltage source in series; the reference electrode of the adjustable reference voltage source is electrically connected with the secondary output end of the transformer after being connected with a resistor R35 in series, a resistor is connected between the reference electrode and the anode in parallel, a capacitor C16 and a resistor R34 which are connected in series are connected between the reference electrode and the cathode in parallel, and the cathode is electrically connected with the output end of the optocoupler emitting end U1A through the resistor R7.

In order to improve the reliability of the circuit, a piezoresistor VR1 is connected in parallel at the front end of the pre-stage EMI filter circuit, and a piezoresistor VR2 is connected in parallel at the output end of the rectifier circuit. The voltage dependent resistor is a resistor device with nonlinear volt-ampere characteristics, and is mainly used for clamping voltage when a circuit bears overvoltage and absorbing redundant current to protect a sensitive device.

Specifically, the voltage drop circuit comprises a voltage drop chip U1, and a SY8291 chip is adopted; the switching frequency of the SY8291 chip is 800KHz, the asynchronous switch step-down transformer with high conversion efficiency has wider input voltage of 5-40V, output current of 1.2A, low output impedance and better ripple resistance. And the output end of the voltage drop circuit is connected with an inductor L1 and a magnetic bead FB1 in series and supplies power to the control circuit.

The utility model discloses through the data of WIFI communication circuit transmission reception cell-phone APP operation, realize that control signal's change adjusts luminance with control LED lamps and lanterns and mixes the setting of the many scenes of colour temperature and regularly close and open and support artificial intelligence speech control. Firstly, network access is carried out on equipment, and the mode of networking is completed by using a WIFI communication circuit, wherein the mode of accessing the Internet (Internet) through a network (WSN) is completed by deploying a protocol conversion gateway. After hardware intellectualization is completed, data are collected and uploaded to a data center (PaaS) platform, and commands are issued through mobile phone software APP to achieve the functions of controlling wireless dimming, color temperature regulation and multi-scene setting of the LED lamp and timing closing and opening and support artificial intelligence voice control.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an intelligence drive circuit based on WIFI wireless control which characterized in that includes the power supply part: preceding stage EMI filter circuit, rectifier circuit, vary voltage circuit, PFC control circuit, back stage filter circuit, output circuit to and control section: the WIFI communication circuit comprises a WIFI communication circuit, a control circuit and a voltage drop circuit; the alternating current power supply sequentially achieves filtering and rectification to output direct current through the front-stage EMI filter circuit and the rectifier circuit, the direct current is converted and output from a main primary circuit to a secondary circuit of the transformer circuit, then load working voltage is output to the output circuit through the rear-stage filter circuit, an auxiliary primary circuit of the transformer circuit is electrically connected with a feedback end of the PFC control circuit, the PFC control circuit controls the on-off of the main primary circuit of the transformer circuit through a switch tube Q1, the auxiliary primary circuit of the transformer circuit provides starting voltage for the PFC control circuit, a polar capacitor C17 is connected in parallel to the auxiliary primary circuit of the transformer circuit to achieve rapid starting of the PFC control circuit, and a main secondary stage of the transformer circuit is connected with an optical coupling receiving end U1B of the PFC control circuit through an optical coupling transmitting end U1A to achieve feedback of secondary output voltage of the transformer circuit through optical coupling isolation communication; the voltage drop circuit drops the load working voltage into the working voltage required by the WIFI communication circuit and the control circuit, the WIFI communication circuit is in communication connection with the upper computer through a wireless network, the control circuit controls the output circuit according to a control instruction received from the WIFI communication circuit, and the output circuit drives the load.

2. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: an LR parallel circuit is electrically connected between the preceding EMI filter circuit and the rectifying circuit.

3. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the IO port of the PFC control circuit is connected with resistors R9 and R10 in series and then is electrically connected with the control end of a switching tube Q1, and the resistor R10 is connected with a reversely connected diode D1 in parallel.

4. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the secondary of the transformation circuit is connected in series with two parallel zener diodes D4, and the zener diode D4 is connected in parallel with an RC series circuit.

5. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the output circuit comprises a switch tube, the control end of the switch tube is electrically connected with the PWM output end of the control circuit, and the input end of the switch tube is supplied with power by load working voltage.

6. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the positive end of the capacitor C17 is electrically connected with the input end of the optocoupler receiving end U1B after being connected with the resistor R8 in series, one path of the output end of the optocoupler receiving end U1B is electrically connected with the feedback end of the PFC control circuit through the current-limiting resistor R29, and the other path of the output end of the optocoupler receiving end U1B is electrically connected with the secondary primary loop of the voltage transformation circuit after being connected with the voltage-stabilizing diode.

7. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the secondary output end of the voltage transformation circuit is electrically connected with the input end of the optocoupler emitting end U1A after being connected with a diode and a resistor in series, the input end of the optocoupler emitting end U1A is also electrically connected with a filter circuit connected with RC in parallel, and the output end of the optocoupler emitting end U1A is connected with a resistor R7 and an adjustable reference voltage source in series; the reference electrode of the adjustable reference voltage source is electrically connected with the secondary output end of the transformation circuit after being connected with a resistor R35 in series, a resistor is connected between the reference electrode and the anode in parallel, a capacitor C16 and a resistor R34 which are connected in series are connected between the reference electrode and the cathode in parallel, and the cathode is electrically connected with the output end of the optocoupler emitting end U1A through the resistor R7.

8. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: the front end of the preceding stage EMI filter circuit is connected with a voltage dependent resistor VR1 in parallel, and the output end of the rectifying circuit is connected with a voltage dependent resistor VR2 in parallel.

9. The intelligent driving circuit based on WIFI wireless control of claim 1, wherein: and the output end of the voltage drop circuit is connected with an inductor L1 and a magnetic bead FB1 in series and supplies power to the control circuit.