Inductance ballast and electronic ballast are different
Inductance ballasts inductive reactance of inductance and self induction electromotive force is used to light the gas discharge lamps and lanterns, self inductance electromotive force "breakdown" tube gas launch tubes, inductance limiting lamp current is not burned. Electronic ballast is to use electronic devices to produce high frequency electrical oscillation and limit the lamp current, the use of high frequency current to light up the lamps and lanterns, the gas discharge tubes under the action of high frequency current need not to have to high-pressure glow discharge and luminescence, no flicker and light tubes.
Principle difference: When electricity inductance ballasts, work, the starter electric current flows through the ballast - filament 1-2 - the starter filament constitute a loop, the filament preheating and heating bimetallic strip inside the starter, after a few seconds of bimetallic strip temperature reaches a certain value, the distortion, after the first short circuit breakers, the starter circuit circuit in the current moment sharply reduced, so that the inductance ballasts have a huge self-induction voltage (kv) breakdown of the gas inside the tubes, tubes launch. Starts the tubes, pipe pressure drop drops rapidly, no longer work, the starter inductance ballasts turned into a "resistance" series of tubes (actually use is the inductive reactance of inductance), limit tube current.
Structural differences: The electrosensory ballast structure is simple, a coil wrapped around a core, and the electronic ballast is a circuit board. Electronic ballast can be connected directly to the lamp tube, and the inductor is required to install the regenerator (bubble).
Electronic ballast weighs "light" and has different electronic components, which weigh "heavy". The electronic ballast is powered by a dc power supply, but the inductor is fully communicated. (e.g., 24 v DC) 3) electronic ballast does not need a regenerator when working, but the inductor is usually required (but if the voltage is 110V, it may not). 4) the power factor of electronic ballast (0.9 +), but the inductance ballast is low (generally lower than 0.5) 5) electronic ballast does not have a long service life.
Electronic ballast after electrify, internal by two power transistor, a magnetic ring transformer and several other components of half bridge inverter circuit to work, continue to high-frequency oscillation and high frequency current, output level and at the end of the electronic ballast circuit is a high frequency current through a small inductance (choke) first, and then through the filament 1, then connect a polyester capacitor, the filament after 2, and then flow back. Among them, the reactor and capacitor in series structure, constitute the series resonance circuit, through the high frequency current and series resonance occurs, the voltage of the capacitance and inductance would have greatly increased, far higher than that of the input values, start the high pressure generated electronic ballasts using this principle to make the lamp glow, the starter without having to use. After the lamp is started, the ballast will be delivered to the lamp in the form of a constant current, which will continue to light up.
