CN201986248U

CN201986248U - 1000W electronic ballast with 347V high voltage input

Info

Publication number: CN201986248U
Application number: CN201120111482XU
Authority: CN
Inventors: 邱明
Original assignee: Lumlux Lighting Suzhou Inc
Current assignee: Lumlux Lighting Suzhou Inc
Priority date: 2011-04-15
Filing date: 2011-04-15
Publication date: 2011-09-21
Anticipated expiration: 2021-04-15

Abstract

The utility model discloses 1000W electronic ballast with a 347V high voltage input. The electronic ballast comprises a filter circuit module, a rectification circuit module, a power factor correcting circuit module, a half-bridge, a half bridge drive circuit module, a lamp network, a control circuit module and a high-voltage power supply circuit module, wherein, the power factor correcting circuit module, the half-bridge drive circuit module, the control circuit module and the high-voltage power supply circuit module are arranged on an independent circuit board in an integrated manner to form a module circuit, which is connected with a main board through welding pins or contact pins. The control circuit module comprises a singlechip control chip and a PWM (pulse-width modulation) control chip, wherein, a program is written in the singlechip, and a software is used for controlling the starting of the PWM control chip, the PWM frequency adjustment and the like so as to control the ignition time, ignition frequency, abnormal protection, and the like of the electronic ballast. The input voltage of the electronic ballast adapts to 347V, the output power of the electronic ballast is up to 1000W and the electronic ballast is controlled through the software, so the control of the electronic ballast is more convenient and steady.

Description

The 1000W electric ballast of 347V high voltage input

Technical field

The utility model relates to a kind of circuit structure of electric ballast, relates in particular to a kind of circuit structure design that high voltage input and power output reach the electric ballast of 1000W that is suitable for.

Background technology

Because the application of development of semiconductor and new production technology, the proof voltage value of metal-oxide-semiconductor can reach 1000V, and technology is constantly ripe, the quality of the metal-oxide-semiconductor of some famous semiconductor production manufacturers also can guarantee in the world, the Switching Power Supply of more high voltage input and the development of lighting apparatus have been impelled

Along with the application of electric ballast at lighting field, the voltage of electric ballast no longer only is the scope of 120V-240V, and the electric ballast of high-power output is imported in some markets also a kind of high voltage of demand.

Summary of the invention

Defective in view of above-mentioned prior art existence, the purpose of this utility model is the 1000W electric ballast that proposes a kind of 347V high voltage input, adopt modular circuit design, use more high voltage withstanding metal-oxide-semiconductor, make electric ballast that good Electro Magnetic Compatibility be arranged, can safer, more reliable work.

The purpose of this utility model will be achieved by the following technical programs:

The 1000W electric ballast of 347V high voltage input, described electric ballast is input as the 347V industrial-frequency alternating current, and its power output is the 1000W of coupling high-pressure sodium lamp or Metal halogen lamp, it is characterized in that comprising the filter circuit module, the rectification circuit module, the circuit of power factor correction module, half-bridge, the half-bridge drive circuit module, the lamp network, control circuit module and high-voltage power circuit module, wherein said circuit of power factor correction module, the half-bridge drive circuit module, control circuit module and high-voltage power circuit module be integrated is located at composition module circuit on the independent circuit board, and the mainboard by capillary or contact pin and lamp network place joins.

Further, described half-bridge comprises two field effect transistor, and the rated direct voltage that each field effect transistor can bear is at least 630V;

Further, control circuit module described in the modular circuit comprises single-chip microcomputer and pwm chip at least, and the power take-off of lamp network inserts single-chip microcomputer, and the startup and the PWM frequency adjustment of described scm software control pwm chip.

Further, the input of the module of high-voltage power circuit described in the modular circuit one end connects control circuit module, and other end output is connected to half-bridge, and it comprises integrated high frequency switch transformer and mains switch chip.

The application implementation of the utility model electric ballast, its outstanding effect is:

This electric ballast has rationally utilized the space of original ballast, with the circuit of big electric current and big components and parts as mainboard, and the partial circuit that will be referred to control adopts the modular circuit split-type design, significantly saved the volume of electric ballast, and production, easy to maintenance, safe and reliable, Electro Magnetic Compatibility is better.In addition, control circuit module partly provides the operating state of this electric ballast self check lamp network, carries out the ability of abnormal protection.

Description of drawings

Fig. 1 is the structured flowchart of the electric ballast of 347V input 1000W

Fig. 2 is the schematic diagram of the electric ballast of 347V input 1000W.

Embodiment

Following constipation closes the embodiment accompanying drawing, embodiment of the present utility model is described in further detail, so that technical solutions of the utility model are easier to understand, grasp.

The electric ballast of this practical described 347V input 1000W comprises filter circuit module 1, rectification circuit module 2 as shown in Figure 1, circuit of power factor correction module 3, half-bridge 4, lamp network 5, half-bridge drive circuit module 6, control circuit module 7 and high-voltage power circuit module 8.Control circuit module provides high-frequency driving signal, half-bridge drive circuit module drive half-bridge field effect transistor alternation switch for the half-bridge drive circuit module.Control module can also detect the electric current of lamp network, judges power and abnormality.High-voltage power module input power supply is the 630V direct voltage after the circuit of power factor correction module, the direct voltage supply control circuit module of output 15V.

Be the circuit diagram of 347V input 1000W electronic ballast implement body as shown in Figure 2.Comprise two groups of filter L1 and L2 in its filter circuit module, 3 X capacitor C 1, C2 and C3,4 Y capacitor C 4, C5, C6, C7, discharge resistance R1 and R2; Also comprise gas discharge tube K1 in the filter circuit module, piezo-resistance RV1, fuse F1, F2, circuit protection and anti-surge circuits such as NTC thermistor NTC1.

Rectifier bridge BR1 is converted to the 490V direct current with alternating current 347V after the filter circuit module.Inductance L 3 shown in Fig. 2, field effect transistor T1, T2, high speed diode D1 are the main elements in the circuit of power factor correction module.Include the power factor correction chip in module PC, the P1 pin detects the no-voltage of the secondary winding detection of L3, and the P5 pin is the driving output of power factor correction chip, and by voltage-stabiliser tube DW1, the DW2 voltage stabilizing drives T1 and T2.The P2 pin detects the voltage after the rectification, and the P7 pin is the supply pin of power factor correction chip, and the P3 pin detects the 630V direct current at electrochemical capacitor two ends.Because the electric current of electric ballast is very big, use two field effect transistor T1, the mode of T2 parallel connection makes the work of circuit of power factor correction module safety and reliability.The circuit of power factor correction module has the effect of boosted voltage, produces the high voltage direct current of 630V at the electrochemical capacitor two ends.Here use 4 series-parallel modes of electrochemical capacitor to solve the problem of electrochemical capacitor proof voltage and ripple current, and by R3, two resistance series connection of R4 similar resistance equate the voltage of electrochemical capacitor, have improved the reliability of circuit.

347V input 1000W electric ballast described in the utility model adopts half-bridge topology, and T3, T4 are two field effect transistor of half-bridge; DR is the driver module of half-bridge, comprises single-chip microcomputer and pwm chip in the PC control module, and P9 and P10 pin are the output pins of PWM ripple, offer the half-bridge driven module, drives the T3 in the half-bridge, T4; C18, L4, C19, C20, C21 constitutes the resonant circuit of lamp network, for improving the withstand voltage of resonant capacitance, with C19, C20, C21 series connection.

Pwm chip in the PC control module adopts the frequency of oscillation of regulating pwm chip to control its output PWM wave frequency, and the power of lamp network increased when frequency reduced.R9 is a power detection resistance, and along with the rising of power, the voltage on the R9 increases, and the PWM wave frequency no longer changes during to certain value, keeps the permanent power of lamp.C24, C25, C26 detect the unusual of lamp, if having unusually, then can close the output of pwm chip, and electric ballast is quit work.

High-voltage power module DY as shown in Figure 2 is converted to low-voltage output with direct current 630V voltage, power supply is provided for circuit or element among the control module PC.Switching power source chip U1 and high frequency switch transformer L1-1 have wherein been comprised; come recently to control the voltage of output with the number of turn of high frequency switch transformer by the duty cycle of switching of configuration switch power supply chip; and feedback circuit is arranged; make output stable, have functions such as overcurrent protection, overload protection, short-circuit protection, overheat protector.

It more than is detailed description to operation principle of the present utility model and circuit structure; just for the utility model is described; be not restriction diversity of the present utility model, all the technical solution of the utility model is simply revised in addition all is within the scope of the protection of prescription.

Claims

1.347V the 1000W electric ballast of high voltage input, it is characterized in that comprising filter circuit module, rectification circuit module, circuit of power factor correction module, half-bridge, half-bridge drive circuit module, lamp network, control circuit module and high-voltage power circuit module, wherein said circuit of power factor correction module, half-bridge drive circuit module, control circuit module and high-voltage power circuit module be integrated is located at composition module circuit on the independent circuit board, and the mainboard by capillary or contact pin and lamp network place joins.

2. the 1000W electric ballast of 347V high voltage input according to claim 1, it is characterized in that: described half-bridge comprises two field effect transistor, and the rated direct voltage that each field effect transistor can bear is at least 630V.

3. the 1000W electric ballast of 347V high voltage input according to claim 1, it is characterized in that: control circuit module described in the modular circuit comprises single-chip microcomputer and pwm chip at least, the power take-off of lamp network inserts single-chip microcomputer, and the startup and the PWM frequency adjustment of described scm software control pwm chip.

4. the 1000W electric ballast of 347V high voltage input according to claim 1, it is characterized in that: the input of the module of high-voltage power circuit described in the modular circuit one end connects control circuit module, other end output is connected to half-bridge, and it comprises integrated high frequency switch transformer and mains switch chip.

5. the 1000W electric ballast of 347V high voltage input according to claim 1, it is characterized in that: described electric ballast is input as the 347V industrial-frequency alternating current, and its power output is the 1000W of coupling high-pressure sodium lamp or Metal halogen lamp.