Power controller

A power controller connected to a plurality of power supplies and a load, the power controller comprising:

• a plurality of switch elements provided corresponding one-to-one to the plurality of power supplies, each of the plurality of switch elements switching on or off to switch between supplying electric power from a corresponding one of the plurality of power supplies to the load and stopping the supply;
• an operation processing circuit to compute an amount of operation for adjusting the electric power supplied to the load;
• and
• a signal generator, wherein
• the signal generator includes
• a correction value operation unit to obtain a correction value based on a difference of an on-pulse width between a shunt current flowing through a corresponding one of the plurality of switch elements and a shunt drive signal for driving the corresponding one of the plurality of switch elements, and
• a corrector to correct, based on the correction value, an amount of operation output from the operation processing circuit and output the corrected amount of operation,
• the signal generator computes, based on the corrected amount of operation, a number of switch elements to be turned on among the plurality of switch elements and a duty ratio set to the number of switch elements to be turned on and generate, based on the determined number of switch elements and the determined duty ratio, a signal for driving at least one of the plurality of switch elements,
• different numbers are individually are assigned to the plurality of switch elements,
• the signal generator selects a switch element to be a starting point among the plurality of switch elements,
• the signal generator determines, based on the number of switch elements to be turned on, the switch elements to be turned on in order of the numbers assigned to the plurality of switch elements from the switch element to be the starting point, and changes a switch element to be the starting point when the number of switch elements decreases, and
• the signal generator includes an overvoltage detector to output an overvoltage detection signal when a fluctuation range of a voltage supplied to the load exceeds a predetermined fluctuation range.