Abstract: Systems and methods for providing variable-frequency soft start of an AC load are disclosed. In one exemplary embodiment, a method for starting an alternating current (AC) load with a variable-frequency AC power output includes receiving an indication of a duty cycle for chopping the AC power output during starting of the AC load, and determining a frequency of the AC power output. The method further includes chopping the AC power output at the duty cycle, based on the determined frequency of the AC power output, and providing the chopped AC power output to start the AC load.

Abstract: A ground loop detection and prevention system includes multiple electric power generators driven by one or more rotational power sources. Each of the electrical generators has a set of generator windings with a neutral point. A transformer having a number of primary windings as well as a secondary winding is connected to the neutral points via the primary transformer windings. An interrupter device such as a GFCI is connected across the transformer's secondary winding, such that when a ground loop current occurs in any of the generator windings, the interrupter device detects the loop and stops the operation of the generators.