A method of controlling a variable speed constant frequency (VSCF) power converter, the method comprising: receiving a determination that a sensed AC current output has exceeded a predetermined limit (I_CURRENT_LIMIT), the AC current output being converted from a DC voltage (V DC) and having a constant frequency, the DC voltage being converted from a variable frequency AC voltage, the variable frequency AC voltage being generated in response to a mechanical energy input having a varying parameter; receiving the sensed AC current output (I Inverter); comparing in a first comparison the sensed AC current output to the predetermined limit for determining whether the sensed AC current output has exceeded the predetermined limit, and receiving a sensed AC voltage sensed after conversion to the constant frequency AC current and before provision to an AC load; and comparing in a second comparison the sensed AC voltage to an AC voltage reference signal; and controlling conversion of the DC voltage into the AC current output as a function of at least one of the first and second comparisons; characterized in that in response to a determination that the sensed AC current output has exceeded the predetermined limit (I_CURRENT_LIMIT), decreasing the DC voltage; and wherein decreasing the DC voltage includes adjusting a voltage reference signal (V_DC_REF), wherein the voltage reference signal is compared to the DC voltage as sensed (V_Sensed DC) after being converted from the variable frequency AC voltage and before being converted into the AC output, and the generation of the variable frequency AC voltage is controlled as a function of a result of the comparison. receiving a determination that a sensed AC current output has exceeded a predetermined limit (I_CURRENT_LIMIT), the AC current output being converted from a DC voltage (V DC) and having a constant frequency, the DC voltage being converted from a variable frequency AC voltage, the variable frequency AC voltage being generated in response to a mechanical energy input having a varying parameter; receiving the sensed AC current output (I Inverter); comparing in a first comparison the sensed AC current output to the predetermined limit for determining whether the sensed AC current output has exceeded the predetermined limit, and receiving a sensed AC voltage sensed after conversion to the constant frequency AC current and before provision to an AC load; and comparing in a second comparison the sensed AC voltage to an AC voltage reference signal; and controlling conversion of the DC voltage into the AC current output as a function of at least one of the first and second comparisons; characterized in that in response to a determination that the sensed AC current output has exceeded the predetermined limit (I_CURRENT_LIMIT), decreasing the DC voltage; and wherein decreasing the DC voltage includes adjusting a voltage reference signal (V_DC_REF), wherein the voltage reference signal is compared to the DC voltage as sensed (V_Sensed DC) after being converted from the variable frequency AC voltage and before being converted into the AC output, and the generation of the variable frequency AC voltage is controlled as a function of a result of the comparison.