The invention discloses a 400 Hz
inverter repetitive control loop parameter adaptive adjustment method suitable for
inductance parameter disturbance, and belongs to the field of
inverter control. The method comprises the following steps of: establishing a
mathematical relationship among a
voltage outer loop proportional integral (PI) parameter, a
damping ratio of a physical controlled object Po and a natural resonant frequency of an LC filter by taking a Peq amplitude-
frequency characteristic of an RC controlled object under the condition that a
system operates at a power which is three times of a designed output power, namely three times of an overload condition as a reference; and the PI parameter and the
damping ratio are dynamically adjusted on line to realize the amplitude and
phase angle matching of the physical controlled object Po at the resonant frequency when the
inductance value changes. According to the invention, good stability and
harmonic suppression effect of the
repetitive control system under the fluctuation of the filter
inductance value can be realized, and the output
voltage quality of the intermediate-frequency
inverter power supply under different loads can be effectively improved.