What is an Electronic Ballast?

What is an Electronic Ballast?

Electronic Ballast Definition

Electronic Ballast is a kind of Ballast, refers to the use of electronic technology to drive the electric light source, so that it produces the required lighting electronic equipment.

Working principle of Electronic Ballast

The power supply is converted into a DC power supply after passing through a radio frequency interference (RFI) filter, full wave rectification, and a passive (or active) power factor corrector (PPFC or APFC). Through the DC/AC converter, the output 20K-100KHZ high-frequency AC power supply is added to the LC series resonant circuit connected with the lamp to heat the filament, at the same time, resonant high voltage is generated on the capacitor, and it is added to both ends of the lamp, but the lamp "discharge" becomes "on-on" state, and then enters the luminous state. At this time, the high-frequency inductance limits the increase of current. To ensure that the lamp can obtain the lamp voltage and lamp current required for normal work, often add a variety of protection circuits

Technical parameters of electronic ballast

• Power factor

• Total harmonic distortion

• Crest coefficient

Electronic Ballast classification

• Common type, 0.6≥120%90%1.4~1.6 high-frequency to make it small, light, power-saving function;

• High power factor type H, ≥0.9≤30%≤18%1.7~2.1 Passive filtering and exception protection;

• High performance electronic ballast L grade, ≥0.95≤20%≤10%1.4~1.7 has perfect abnormal protection function, electromagnetic compatibility;

• Cost-effective electronic ballast L level, ≥0.97≤10%≤5%1.4~1.7 integrated technology and constant power circuit design, voltage fluctuations affect the illuminance is small;

• Adjustable light electronic ballast, ≥0.96≤10%≤5%≤1.7 using integrated technology and active variable frequency resonance technology.

Electronic Ballast advantages

• Energy conservation

• Eliminate stroboscopic, glow more stable

• More reliable starting point

• High power factor

• Stable input power and output luminous flux

• Prolong lamp life

• Low noise

• Dimmable

Dimming method

• Duty cycle dimming method

• Frequency modulation dimming method

• Voltage dimming method

• Pulse phase modulation dimming method

Development direction

• Maintain constant output power

• Exception protection function

• Reduce temperature rise

• Suitable for wide voltage operating range

• Control lamp current crest coefficient