Patent ID: 9705354
Date: 2017-07-11
CPC Classifications: H02J,H02M,Y02T

Claim:
1. A method comprising the steps of: in an electrical circuit comprising a plurality of silicon controlled rectifiers, each silicon controlled rectifier being electrically coupled to one of a plurality of alternating current inputs, and each silicon controlled rectifier having a gate electrically coupled to the gates of the others of the plurality of silicon controlled rectifiers, using a microprocessor, sensing a battery voltage level; sensing phases of a plurality of alternating current electronic signals, each alternating current electronic signal being received at a phase input electrically coupled to one of the alternating current inputs; comparing the battery voltage level to a predetermined voltage reference level; determining the silicon controlled rectifier fired first in an immediately preceding activation step; and in an activation step, activating and deactivating all of the plurality of silicon controlled rectifiers starting with one of the plurality of silicon controlled rectifiers not determined to be the silicon controlled rectifier fired first in the preceding activation step, where each activation occurs only when the battery voltage level is below the predetermined voltage reference level; providing a three state counter, wherein each state of the three-state counter is associated with one of the plurality of silicon controlled rectifiers; whereby a current state of the three-state counter determines which silicon controlled rectifier will be fired first in the activation step; and upon firing a silicon controlled rectifier associated with the current state of the three-state counter, advancing the three-state counter to a subsequent state in preparation for firing a silicon controlled rectifier associated with the subsequent state first when the battery voltage is below the predetermined voltage reference level.