Auto pre-illumination of HID (HID Lamp, commonly known) has an important working parts, it is the HID Ballast. HID Ballast commonly known as: ballast, transformer, ignition coil, ballast, switching power supply, switching power supply step-up the computer.

Since 2002, land in China set off HID production and sales of hurricanes, auto parts, automotive supplies, automotive and cosmetic industries, and even some foreign companies have joined the ranks of sales of HID system, centralized production facilities in Guangzhou also sprang into existence. 2006 China wholesale auto parts, automotive supplies, automotive supplies, beauty base ---- Yongfu Road, Guangzhou, and at least 15% of store sales HID products, with a monthly volume of more than 50,000 sets of HID sold around the world. Therefore, it was said, Yongfu Road, Guangzhou is China's cradle of HID.
With the HID mature development, production, sales force expansion, production, sales volume is also increasing awareness of the new scientific and technological achievements have full recognition, acceptance and mature understanding. Than in the production and sale, we realized that one should not be neglected - Ballast quality problems. As a set of HID products, the most important is the ballast of stability and product compatibility with the actual installation, it has a direct impact on a product return rate, as well as for the installation of a different vehicle compatibility and installation extensive.
2006 HID manufacturers and distributors, in order to occupy the market, profits and made a reduction of production costs, lower sales profits means. For the HID manufacturers made a means of reducing production costs, mainly reflected in the ballast manufacturer. Ballast capacity of less than the manufacturer, the manufacturer of different skill levels, but all a rush at all to the "money" look. Manufacturers insufficient production capacity, the factory day and night to reduce detection time and the factory testing procedures, increasing the number of the factory, some of the factory will have a failure rate of 2%; some ballast is also flowing liquid silicone, which has been marketing to the market; Manufacturing Weak business technology, the first consideration is how to speed up production and sell to say, do not take into account the maturity of technology problems; in order to market competition, cutting production costs and the replacement of electronic components, selection of cheap components, and some use of counterfeit imports of brand-name components; irrigation plastic filling shallow sand point or add some silicon to reduce the cost of weak; had the standard white box used in industrial packaging paperboard material, become as thin as the white; some unscrupulous sellers simply to find some poor quality ballast and paste brand into an international brand, product, or what in Hong Kong, Germany, Hong Kong origin, or origin Germany, is used to deceive consumers. For the countries do not make the standard before the introduction of ballast, hope to arouse the attention to quality inspection departments to strengthen and to participate in ballast manufacturer of Quality Supervision, as well as vendors selling to rectify substandard or counterfeit products, to protect consumers.
Then, in the production and sale of the current arising in the process of serious quality problems, we need to know more about HID Ballast, HID Ballast yourself familiar with the basic principles and how to identify the quality of HID ballast, it is very necessary, is also an urgent need to to be resolved.
Our HID Ballast, there are two commonly used (such as the monomer Figure 2 and split Ballast Ballast Figure 3): single ballast, is ballast and high-voltage starter to fit; split ballast, is ballast and split high-voltage starter. No matter what kind of ballast with the following features can be identified as good quality of ballast. By understanding the work of HID ballast schematic diagram (Figure 4), we can go a preliminary understanding of some of HID ballast and the use of the performance parameters of knowledge, as follows:
1. With a wide-voltage design pressure performance, generally 7.5V ~ 18V (common ballast is a 9V ~ 16V), can guarantee that low-voltage and high voltage to a normal start-up;
2. With a cold start current is <6.5A (common ballast is 8.5A ~ 9A or even higher) performance, start fast, designed to mobilize the circuit auto-recharge function of current, which is often said that the secondary power supply functions, You can use different manufacturers in different pipe pressure HID bulbs.
3. Hot-start or variable optical power, the starting current <5A (common ballast is even higher than 7A), due to frequent changes to reduce power load light on cars, as well as other electrical equipment, automotive power supply impact; by reduce the electricity load moment to protect a vehicle's existing lines and car's own protection system; low current start fast, due to lower current to start to exclude light for a long time to reduce the visual dimmer at night to stay interference; low current to start to prevent the bad aging or light bulbs, as well as reduce other vehicle electronic equipment interference. Small power supply system is also easy to start unique properties, 10A power supply has been following a low-power supply would be sufficient to start the performance, can be installed on motorcycles and other equipment used; own work, the temperature is relatively low due to their own high temperature to reduce the adverse parts or failure to increase the possibility of reducing the risk of product returns; because of the performance of the above and other products do not have the advantage, adapt and match different manufacturers light bulbs, as well as higher performance cars.
4. Split ballast, use wide-voltage design is the pressure of 7.5V ~ 32V, can be used simultaneously in the 12V voltage, 24V voltage vehicles and vehicles ability to adapt relatively strong;
5. Split ballast, unique shielding, anti-electronic jamming design, you can load any one vehicle, this is the single ballast can not be resolved at present;
6. Split ballast, and it has complete compatibility 35W and 45W, and a stabilizer can use 35W and 45W light bulb, you can also exclude the use of 45W light bulbs lighting test driving front of the computer power shortage problem.
That the above technical requirements, and informed HID Ballast products from a number of technical parameters and the necessary performance, take some time for testing, only an adjustable DC switching power supply, a voltmeter, an ammeter, you can easily achieve stability HID device DIY expert. Choose a ballast, we can not pay attention to its price, we can not rush to purchase and use it, a good quality product, its production cost disparity is less than 5 million sales price of 10 yuan if the gap between the consumer does need consider the product quality and after-sale problems. We can not just "advertisement", but also need to see the product "effect", we can not care product from which plants, but we can not ignore the product quality.
For us to buy an HID Ballast, HID Ballast need to understand the production process (Figure 5), and products manufactured self-test process, help to select products and after-sales service in the future, the fault detection work convenience.
In 2007, no matter what the state has adopted standards or policies, we first need to get a good quality product, ready to accept the market and consumer tests. In 2007, the brand is entering a period of HID, select a quality essential to the success or failure is entirely due to your own selection. In 2007, you can now sell the merits of the quality of the state HID ballast is to decide your HID judgments of the operating period.
 
HID Ballast test
1. Light a lamp to start testing
a. Input Standard Voltage 12.8V light bulb flashing when there should be no phenomenon (about 110 seconds after lighting there will be a slight flicker, then this phenomenon does not occur, this minor flaw being acceptable);
b. Input Standard Voltage 12.8V light bulb moment when the cold-start current should be around 6.5;
c. Input Standard Voltage 12.8V instant when the light bulb hot start current should not exceed 8A
2. Transient high-and low-voltage wire protection test
a. Ballast input voltage is set to between 8 ~ 22V can be a normal start (voltage error should be less than +1 V);
b. When the input voltage drops below 8V or higher than 22V should automatically stop working when the stabilizer (voltage error should be less than +1 V).
c. When the input voltage is restored to more than 8V or 22V below the ballast should be able to automatically return to work (voltage error should be less than + V)
3. No-load Protection Test
a. When the ballast bulb is not received, in a no-load state, the ballast should automatically stop working to avoid high-voltage injuries.
4. Short-circuit protection test
a. Ballast for the short-circuit at the output should be to stop working automatic protection, ballast from damage.
5. Reverse Protection Test
a. Ballast in the input power is negative then the work should be stopped automatically protect against, ballast from damage.
6. Constant Power Test
a. When the input voltage 8 ~ 22V, the ballast output power can be maintained at a constant 35W (plus or minus deviation of not more than 3W) about protection of HID bulbs from damage.
7.1m / sub-power test
a. Ballast for 10 million power / lighting operation can not fail; production test should be a continuous power / lighting test 500 is not failure.
8. High and low temperature ambient temperature operation test
a. Ballast in the -40 degrees Celsius to +105 degrees Celsius ambient temperature may longer work properly.
9. Quick Start Performance Test
a. Power supply input voltage when the standard voltage of 12.8V to start lighting the measured current is not less than about 6.5A, so that the next start second xenon lamp, the luminous flux up to standard width of 20%, 4 seconds, luminous flux up to standard brightness 80 %.
10. A long time to light lamps test
a. Ballast must meet with the battery power input 24-hour uninterrupted trouble-free lighting;
b. To reach a continuous 12 hours a day, accumulated 10,000 hours continuous trouble-free.
11. Working temperature
a. Ballast shall comply with the state to work long hours under the surface temperature should not exceed 40 degrees Celsius.
12. Shockproof test
a. Working conditions under the ballast on the vibration tester with a frequency 10 ~ 45Hz, amplitude 2 ~ 10mm vibration environments, X / Y / Z axis in three directions of 8 hours without any trouble.
b. Ballast in the single case without any packaging from the hard ground and 1-meter free-fall, they should continue to work properly.
13. Waterproof and dustproof testing
a. Will be connected to a good power supply and lamp ballast soaked in water for 24 hours continuous work should have no trouble.
14. Corrosion Testing
15. Radiated Emission Test
a. The actual use of FM radio when the car appeared without noise (radio from the ballast of about 1 m). Ballast on the radio interference is less than-90DB less than 5 micro-watts;
b. Anti-Sink interference: Ballast wiring when working with the oscilloscope measurements at the ripple does not exceed 300mV, measured approximately 150mV ~ 250mV (to avoid interfering with other electrical work)