Constant-voltage WPT system parameter design method based on boundary condition constraint

The invention discloses a constant-voltage WPT system parameter design method based on boundary condition constraint. The method comprises the steps that the coil size, the farthest transmission distance of wireless electric energy, the expected voltage gain and the range of load resistance are set; setting boundary conditions: a voltage gain error boundary value, a slope boundary value of a turning point, a maximum phase angle boundary value and a current gain error boundary value; initializing constant-voltage WPT system parameters; calculating self-inductance and internal resistance of the primary coil and the secondary coil and a coupling coefficient of the constant-voltage WPT system; calculating an error of the voltage gain relative to an ideal voltage gain, a slope of an error curve turning point, a phase angle difference between the input voltage and the current, and an error of the current gain relative to an ideal current gain; and when the constant-voltage WPT system does not operate in the range l