CN203851327U

CN203851327U - An LED silicon controlled rectifier light adjusting power source

Info

Publication number: CN203851327U
Application number: CN201420132258.2U
Authority: CN
Inventors: 夏保林
Original assignee: GUANGZHOU ZHONGHENG OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: GUANGZHOU ZHONGHENG OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2014-03-24
Filing date: 2014-03-24
Publication date: 2014-09-24
Anticipated expiration: 2024-03-24

Abstract

Provided is an LED silicon controlled rectifier light adjusting power source. An active bleeder circuit module composed of resistors (R5, R6, R7, R8, R10), a capacitor C2, a field effect transistor Q3, a triode Q1, a Zener diode ZD1 and a Zener diode ZD2 and an active damping vibration absorbing circuit module composed of resistors (R15, R11, R22), a diode D2, a triode Q4, a capacitor C3, a Zener diode ZDV1, a field effect transistor Q6 and a damping resistor R12 are arranged between a power frequency rectification circuit module and a single-stage PFC circuit module. The active bleeder circuit module is in parallel connection with the active damping vibration absorbing circuit module. According to the LED silicon controlled rectifier light adjusting power source, compatibility problems between an LED driver and a silicon controlled rectifier light modulator are solved; a relatively wide light modulation scope and a smooth light modulation process are realized; silicon controlled rectifier phase light modulation without scintillation is completely realized; and direct replacement of a traditional lamp by an LED is realized.

Description

A kind of LED thyristor regulating photoelectric source

Technical field

The utility model relates to LED lighting field, relates in particular to a kind of LED thyristor regulating photoelectric source.

Background technology

Conventional lights has resistive load characteristic, the topology in Switching Power Supply topology with resistive load characteristic is pfc circuit, its dynamic response of single-stage PFC circuit is poor, the inhibition of the concussion cannot eliminate controlled silicon conducting time, the larger surge current of filter capacitor charging after rectification being produced, and the angle of flow in every half power frequency is identical and the needed electric current that maintains when controlled silicon conducting.Solve the compatibling problem of LED driver and controllable silicon dimmer, realize wider dimming scope, level and smooth light modulation process, realizes the controllable silicon phase dimming of flicker free completely, and making LED directly replace conventional lamp is to perplex a great problem of industry.

Summary of the invention

The purpose of this utility model is in order to solve prior art problem, a kind of LED thyristor regulating photoelectric source is provided, it can solve the compatibling problem of LED driver and controllable silicon dimmer, realize wider dimming scope, level and smooth light modulation process, realize the controllable silicon phase dimming of flicker free completely, make LED directly replace conventional lamp and be achieved.

The utility model is achieved in that

A kind of LED thyristor regulating photoelectric source, it is by passive leadage circuit module, EMI circuit module, industrial frequency rectifying circuit module, single-stage pfc circuit module, constant pressure and flow circuit module forms by serial connection mode, between industrial frequency rectifying circuit module and single-stage pfc circuit module, be provided with by resistance (R5, R6, R7, R8, R10), capacitor C 2, field effect transistor Q3, triode Q1 and voltage stabilizing didoe ZD1, the active leadage circuit module of ZD2 composition and by resistance (R15, R11, R22), diode D2, triode Q4, capacitor C 3, voltage stabilizing didoe ZDV1, the active damping weakening circuit module that field effect transistor Q6 and damping resistance R12 form, active leadage circuit module and active damping weakening circuit module are connected in parallel.

The beneficial effects of the utility model are by increasing active leadage circuit module and active damping weakening circuit module, solve the compatibling problem of LED driver and controllable silicon dimmer, realize wider dimming scope, level and smooth light modulation process, realize the controllable silicon phase dimming of flicker free completely, make LED directly replace conventional lamp and be achieved.

Brief description of the drawings

Fig. 1: be circuit principle structure schematic diagram of the present utility model.

Embodiment

Below in conjunction with legend, the utility model is further described.

As shown in Figure 1, a kind of LED thyristor regulating photoelectric source, it is by passive leadage circuit module, EMI circuit module, industrial frequency rectifying circuit module, single-stage pfc circuit module, constant pressure and flow circuit module forms by serial connection mode, between industrial frequency rectifying circuit module and single-stage pfc circuit module, be provided with by resistance (R5, R6, R7, R8, R10), capacitor C 2, field effect transistor Q3, triode Q1 and voltage stabilizing didoe ZD1, the active leadage circuit module of ZD2 composition and by resistance (R15, R11, R22), diode D2, triode Q4, capacitor C 3, voltage stabilizing didoe ZDV1, the active damping weakening circuit module that field effect transistor Q6 and damping resistance R12 form, active leadage circuit module and active damping weakening circuit module are connected in parallel.

About active leadage circuit module, it is made up of resistance (R5, R6, R7, R8, R10), capacitor C 2, field effect transistor Q3, triode Q1 and voltage stabilizing didoe ZD1, ZD2.In the time that controlled silicon conducting angle is very little, by resistance R 5, R6, R8 and capacitor C 2, field effect transistor Q3 is setovered, make slowly conducting of field effect transistor Q3, this branch road is connected with controllable silicon in serial connection, provide controllable silicon the needed electric current 30 ~ 50mA that maintains, in the time that input voltage rises to a certain threshold voltage, by resistance R 5, R7, R9 and voltage stabilizing didoe ZD1, biasing triode Q1, makes its slowly conducting, and then saturated, 2 liang of terminal potentials of capacitor C are dragged down.Therefore, it is large that the series arm impedance of field effect transistor Q3 and resistance R 10 becomes, power-dissipation-reduced, and silicon controlled maintains electric current and is mainly provided by the DC-DC module of rear end.In the time that ac bus voltage makes the complete degree of depth saturation conduction of triode Q1, capacitor C 2 both end voltage are zero, and field effect transistor Q3 is conducting no longer, thoroughly disconnect this branch road and silicon controlled and are connected in series, and voltage stabilizing didoe ZD2 shields to the driving of field effect transistor Q3.

About active damping weakening circuit module, it is by resistance R 15, R11, R22, and diode D2, triode Q4, capacitor C 3, voltage stabilizing didoe ZDV1, field effect transistor Q6 and damping resistance R12 form, and field effect transistor Q6 and damping resistance R12 are connected in parallel.This circuit equivalent is in delay switch, and surge current when capacitor C 10 charging during to the firm conducting of controllable silicon dimmer and the formation of ring are played damping and done use.In the time that controllable silicon starts conducting, utilize the damping action of resistance R 12 to surge current, greatly reduce the climbing (di/dt) of surge current, meanwhile, triode Q4 charges to capacitor C 3 by resistance R 15 and voltage stabilizing didoe ZDV1, and the grid potential of field effect transistor Q6 constantly raises.Field effect transistor Q6 conducting by damping resistance R12 short circuit after one period of time of delay, makes the power consumption of damping resistance R12 close to zero.Delay circuit is made up of resistance R 15 and capacitor C 3, if ignore VD internal resistance, and charge constant τ=R15* capacitor C 3.The resistance value that increases resistance R 15, can increase the turn on delay time, makes active damping circuit can adapt to the controllable silicon dimmer of various different performances.But in order to improve power-efficient, time of delay should be as far as possible short, be generally 1ms left and right.The effect of transistor VT is to discharge to capacitor C 3 in the time that controllable silicon turn-offs.Utilize voltage stabilizing didoe ZDV1, can carry out clamper protection to the grid voltage of metal-oxide-semiconductor field effect transistor.

Above are only preferred embodiment of the present utility model, certainly, can also have other execution mode with further exploration according to actual needs.But, should be clear and definite, based on similar the conversion above-mentioned or execution mode with same idea that other is not explained out, within all should being encompassed in protection range of the present utility model.

Claims

1. a LED thyristor regulating photoelectric source, it is by passive leadage circuit module, EMI circuit module, industrial frequency rectifying circuit module, single-stage pfc circuit module, constant pressure and flow circuit module forms by serial connection mode, it is characterized in that: between industrial frequency rectifying circuit module and single-stage pfc circuit module, be provided with by resistance (R5, R6, R7, R8, R10), capacitor C 2, field effect transistor Q3, triode Q1 and voltage stabilizing didoe ZD1, the active leadage circuit module of ZD2 composition and by resistance (R15, R11, R22), diode D2, triode Q4, capacitor C 3, voltage stabilizing didoe ZDV1, the active damping weakening circuit module that field effect transistor Q6 and damping resistance R12 form, active leadage circuit module and active damping weakening circuit module are connected in parallel.