Voltage control utilizing multiple PWM patterns

A method of controlling a voltage at a load device, the method comprising:

• measuring, at the beginning of a first cycle in a first cyclic measurement pattern, a first voltage at the load device;
• detecting, based on the first voltage, a first change in the voltage;
• determining that the first change in the voltage is below a voltage-change threshold;
• controlling, based on the determining that the first change in voltage is below the voltage-change threshold, the voltage according to a first cyclic control pattern;
• measuring, at the beginning of a second cycle in the first cyclic measurement pattern, a second voltage at to the load device;
• detecting, based on the second voltage, a second change in the voltage;
• determining that the second change in the voltage is above a voltage-change threshold;
• and
• controlling, based on the determining that the second change in voltage is above the voltage-change threshold, the voltage according to a second cyclic control pattern;
• wherein the first cyclic control pattern operates at a first frequency and the first cyclic measurement pattern and the second cyclic control pattern operate at a second frequency that is a first positive-integer multiple of the first frequency, wherein the first positive-integer multiple is greater than 1.

A voltage controller configured to:

• measure, at the beginning of a first measurement cycle in a cyclic measurement pattern, a first voltage at a load device;
• measure, at the beginning of a second measurement cycle in the cyclic measurement pattern, a second voltage at the load device;
• detect a first rate of change in voltage based on the first and second voltages;
• determine that the first rate of change in voltage is below a first voltage-change threshold;
• and
• control, based on the determining, the voltage according to a steady-state cyclic control pattern;
• wherein the cyclic measurement pattern operates at a first frequency, the steady-state cyclic control pattern operates at a second frequency, and the first frequency is a first positive-integer multiple of the second frequency, wherein the first positive-integer multiple is greater than 1.