Ignitor excitation circuits and misfire indication circuits

Several circuits are available for excitation of ignitron rectifiers. Static magnetic-impulse circuits are used for most applications. Several such circuits are discussed in some detail. Ignitor requirements are given, and circuit requirements affecting the choice of excitation circuits are indicated. While ignitor failures are rare, they should be detected promptly to utilize all apparatus to the best advantage. Two conditions may arise 1. When two anodes operate in parallel from a single transformer winding. 2. When a single anode is connected to each transformer winding. Means for detecting ignitor misfiring are described for both conditions.