Digital current comparator fractional turn ratio compensation device and method

The invention relates to a digital current comparator fractional turn ratio compensation device and method, the device comprises a shunt and a plurality of winding units, and the plurality of winding units are connected in series; each winding unit comprises a switch unit and a coil, and whether the coil in each winding is connected to the shunt or not is controlled by the switch unit. The method comprises the steps that after a control system gives a target number of turns, the target number of turns is divided into an integer part and a decimal part, the decimal part serves as input of fractional turn control, and the number of fractional turns corresponding to the decimal part of the target number of turns is calculated through shunting parameters; the number of turns of the fractional turns determines the short circuit or access and the direction of the coil through a turn number algorithm realized by binary fractional turns or balanced ternary fractional turns, and then the short circuit or access and th