Fault detection methods and devices for pulse width modulation converters

A method, comprising:

• receiving a first signal comprising a first pulse width modulation waveform, the first signal for controlling a switching component via a first node;
• receiving a second signal comprising a second pulse width modulation waveform, the second signal output via a second node of the switching component;
• and
• transmitting a third signal based at least in part on a first comparison of the first signal and the second signal and/or a second comparison of the first signal and the second signal, wherein the third signal indicates whether a fault has occurred at the switching component;
• wherein the first comparison of the first signal and the second signal is initiated based at least in part on a value of a counter being equal to a first value, and wherein the second comparison of the first signal and the second signal is initiated based at least in part on the value of the counter being equal to a second value.

A method, comprising:

• receiving a signal comprising a first pulse width modulation waveform, the signal output by a converter leg comprising two or more switching components;
• performing, during a first time period, a first operation to determine if a voltage of the signal satisfies a first voltage threshold;
• performing, during a second time period, a second operation to determine if the voltage of the signal satisfies a second voltage threshold, wherein the second voltage threshold is higher than the first voltage threshold;
• and
• outputting an indication that one or more faults have occurred at the converter leg if the signal satisfies the first voltage threshold, the second voltage threshold, or both;
• wherein the first operation is initiated based at least in part on a value of a counter being equal to a first value, and wherein the second operation is initiated based at least in part on the value of the counter being equal to a second value.