Operation of a Pulse width Modulator Power supply  Sept 4 2026

A PWM is used in the Hydrogen generator system to reduce the Electrical energy wasted as Heat energy, rather than producing hydrogen gas.   The following paragraphs explain the operation of  a PWM.

In this explanation the term motor has the  same meaning as the hydrogen generator electrolysis load cells.

PWM profile:

PWM full name: Pulse Width Modulator, referred to PWM. Because of its special properties, often used as a DC circuit lighting dimmer or DC motor speed. This circuit is the use of pulse width modulation (PWM) principle of making the motor controller. Adopt the ways to control the motor speed has two advantages:

1. It is primarily by changing the duty cycle of the output square wave, such that the average load on the on-time changes from 0-100%, to achieve the purpose of adjusting the brightness of the load / speed. The use of pulse width modulation (PWM) mode to achieve the benefits of dimming / governor’s energy supply can be fully utilized, the high efficiency of the circuit. For example: When the output is 50% of the square wave, pulse-width modulation (PWM) power supply circuit are consumed energy is 50%, that is, almost all the energy is converted to a load power output. The use of a common resistance when the buck converter, the power to make the load to get the maximum output power of 50% of the power supply must provide more than 71% of the output power, of which 21% is consumed in the resistor voltage drop and heat dissipation.
2. The use of pulse width modulation (PWM) mode allows the load to get the full supply voltage at work, this will help to overcome the inherent motor winding resistance ( or electrolysis cells internal reactance)  leaving the motor produce more torque.

Reactance is the term or an electrolysis cell that is equivalent to the resistance of a loaded motor.

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