HID electronic ballast works
 
 
Automotive high intensity discharge lamp electronic ballast
Metal halide high-intensity discharge lamps commonly known as HID, can be applied to many fields, especially in the automotive lighting, can effectively reduce accidents, and thus the benefit of mankind, the existing low voltage HID electronic controller prevalent style of old, bulky, components, less use and protective functions, safety and reliability is not high, inconvenient installation problems:
1) When used in the installation or pilot testing, careless "+, -" polarity reversal, or because some parts of the world automotive vehicle is prone to positive ground wire burns when, a serious fire and burn Controller , because this product has a reverse protection circuit;
2) When the power supply or a car battery because the regulator is unstable or cause the vehicle to reduce the capacity of the voltage rise, easy to burn, when the user stops the generator, but forgot to turn off the lights, the battery is nearly exhausted, the voltage drop, the next car lack of adequate voltage when the engine is started;
3) Since the moment when you start the ignition voltage output up to 23KV, when the bulb burned out or damaged and can not be lit when the output is disconnected or broken wires and install the bulb will produce when there is no danger of arcing, possibly resulting in a fire or car the car were wounded, but some users are not careful when installing damage caused by a short circuit of the output lines, will burn, fuse blows;
4) When the lamp at the beginning of aging or different brands of light bulbs and have a more significant parameter error bulb unstable.
The purpose of this design is to provide easy to install, safe, reliable, fully functional high-intensity discharge lamps electronic controller.
This technical solution is: turn connected to a DC power supply back booster, A / C converters and high voltage ignition, high voltage ignition output connected HID high intensity discharge lamps, between the DC power supply and booster set there reverse protection circuit.
This high-intensity discharge lamps electronic controller also includes a control and protection module, the control module includes a primary coil protection switch, pulse width modulator circuit and undervoltage overpressure protection, booster series has a switch, the switch control terminal and the output of the pulse width modulator tube connection, undervoltage overvoltage protection circuit input terminal connected to the output terminal of the DC power supply is sampled output of the undervoltage overvoltage protection circuit is connected to the input of the pulse width modulator .
Open protection control module further comprises short circuit protection, open circuit protection circuit input terminal connected to the output terminal of the booster sampled open circuit protection circuit is connected to the output of the pulse width modulator input.
     This module also includes a control and protection circuit ballast track ballast track circuit voltage were sampled from the output of the booster and the current is sampled from the A / C converter, ballasted track circuit connected to the output of the pulse width modulator input.
And between the DC power supply and booster, A / C converter is provided between the high-voltage ignition and filter network, the DC power supply circuit connected to the output power indicator.
This design has the following advantages:
But when the voltage drop will restart automatically when the user stops the generator, but forgot to turn off the lights, the battery is nearly exhausted, the voltage drop will automatically power-off protection to ensure that the battery can hold enough energy for the next time you start the engine, and some use when those lights to start the generator, due to start the motor suddenly consume very large amounts of current, causing the battery voltage drops, it will protect the generator to start and when to turn off, the voltage returns to normal, the line will immediately return to normal work .
When the light bulb burned out or damaged and can not be lit when the output is disconnected or broken wires and no installation bulbs will produce dangerous arcing, possibly resulting in a fire or inside the car were wounded, so this line has open-circuit protection circuit, when open, short, and automatically cut off the power leakage.
When energized, LED automatically lights up after power, LED goes off, more intuitive and easy to use.
As shown in the circuit block diagram of the circuit including the DC power supply in order to connect a rear booster 2, A / C converter 3 and 4 high-voltage ignition, high voltage output terminal 4 is connected to the ignition HID High Intensity Discharge 5, in DC power supply 1 is also provided with a booster between the two have reverse protection circuit 6, the utility model protection circuit further includes a control module, the control and protection module includes switches 8, 9 and undervoltage pulse width modulator circuit overpressure protection 10, in series with the primary booster coil 2 switch 8, the switch 8 and the control terminal of the pulse width modulator output terminal 9 is connected, voltage overvoltage protection circuit input terminal 10 is connected to a DC power supply sampling an output terminal, an output terminal undervoltage protection circuit overpressure pulse width modulator 10 is connected to the input terminal 9, the control module further comprises open circuit protection protection circuit 7, the open circuit protection circuit 7 is connected to the input terminal of the booster 2 sampled on the output open circuit output terminal of the input protection circuit 7 is connected to the pulse width modulator 9, the control module further comprises a protection circuit 12, the ballast track, track ballast circuit 12 from an output terminal of the booster 2 voltage sampling, the current sample from the a / C converter 3, the output terminal of the ballast circuit 12 is connected to the tracking input of the pulse-width modulator 9, the circuit further comprises a power indication circuit 13, the DC power supply circuit 13 indicating power 1 output is connected between a DC power supply and booster 2, A / C converter 3 and 4 is provided between the high-voltage ignition filter network

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