Method and system for estimating driving point voltage

A system for estimating a driving point voltage of a resistance weld control comprising:

• circuitry for periodically sampling a supplied voltage and a supplied current of a system to obtain a plurality of sets of a sampled voltage value and a sampled current value;
• circuitry for creating a volt time area of the sampled voltage;
• circuitry for creating a current time area of the sampled current;
• circuitry for creating a current difference time area of the sampled current;
• circuitry for determining if current is one of flowing and not flowing;
• circuitry for taking a first set of a sampled voltage value and a sampled current value when the current is not flowing;
• circuitry for taking a second set of a sampled voltage value and a sampled current value when the current is flowing;
• and,
• circuitry for creating an estimated line resistance and an estimated line reactance of the system based on the first set of a sampled voltage value and a sampled current value and the second set of a sampled voltage value and a sampled current value.