Method for providing sinusoidal phase currents with controlling and charging

A method of providing sinusoidal phase currents to a rectifier, the method comprising the steps of:

• detecting and evaluating string voltages;
• rectifying the string voltages;
• connecting a capacitor to a positive output or negative output of a rectifier via one of a first switching transistor or a second switching transistor;
• controlling control inputs of the first switching transistor and the second switching transistor by the control unit in such a way that only the first switching transistor, only the second switching transistor, both or neither of the first nor the second switching transistors becomes conductive;
• and
• charging a capacitor voltage at a capacitor depending on controlling the control inputs such that differences between the string voltages and the capacitor voltage which drops across the coils lead to sinusoidal flows of the mean values of the coil currents, wherein
• the controlling is one of a positive controlling or a negative controlling, wherein the positive controlling takes place in a positive time interval in which two of three string voltages are positive, and wherein the negative controlling takes place in a negative time interval in which two of three string voltages are negative.