4.2 Recharging Circuit Analysis The recharge system went through a number of changes before a final design was made to work. In APPENDICES I and J, earlier work on the recharge system is described. It was first thought that a forced commutation circuit would be necessary to turn off the recharging pulse. While developing that circuit it was soon realized that if sufficient series inductance were present in the circuit and the Q high enough it would oscillate with a period close to the desired value. This would permit the use of an SCR as the "turn on" switching device which later would commutate off at the end of a half cycle of recharging current. A simplified circuit diagram for one polarity of the recharge system is shown in Fig. 4.1. Fig. 4.1 Simplified recharge circuit.
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