Patent ID: 8709221
Filing Date: 2014-04-29
Classification: C25B,Y02E

Abstract:
1. A system for controlling the production of gas by a water electrolysis chamber using pulsed DC current comprising: a water electrolysis chamber; a power supply; an array of solid state power switches operably connected between the power supply and the water electrolysis chamber through a monitoring resistor, the voltage across the monitoring resistor being proportional to current flowing from the power supply to the electrolysis chamber; a first connection configured to supply the voltage across the monitoring resistor through a sample/hold circuit comprising a capacitor to an offset adjustor; a ramp generator adapted to generate a ramp voltage varying between a minimum voltage, V a second connection to supply voltage to the offset adjustor configured to supply a reference voltage to the offset adjustor, the offset adjustor being configured to combine the voltage from the sample/hold circuit and the voltage from the second connection; a third connection from the ramp generator to a first input of a voltage comparator; a fourth connection configured to supply the combined voltage from the offset adjustor to a second input of the voltage comparator; and a fifth connection from the voltage comparator to the array of solid state power switches, whereby the power switches supply pulsed DC current to the electrolysis chamber and maintain the pulsed DC current at or below a desired current magnitude.