ELECTRONIC BALLAST FOR LAMP OPERATED BY ITERATIVE VOLTAGE PULSES, CAPABLE OF ACCELERATING DISCHARGE OF DISCHARGE LAMP AND REDUCING SIZE AND WEIGHT OF THE LAMP BY MANUFACTURING THE BALLAST USING SMALL SIZED COILS AND COMPONENTS

摘要

PURPOSE: An electronic ballast for a lamp operated by iterative voltage pulses is provided to accelerate discharge of a discharge lamp and to reduce the size and weight of the lamp by designing an inductor in a small size by using small sized coils and components. CONSTITUTION: An electronic ballast for a lamp operated by iterative voltage pulses includes three inductors(W1,W2,W3). The inductors generate iterative voltage pulses to a lamp circuit having the lamp. The inductors include a primary winding to which a current from a voltage source is applied. A secondary winding(W2) of the inductors is short-circuited at a low resistance via controllable short-circuit switches(T3,T4) to generate an operation phase of the electronic ballast. The operation phase is produced when the secondary winding is short-circuited at the low resistance.