An apparatus for generating a compensation signal for a power converter where the second harmonic ripple on the voltage bus is substantially removed from the compensation signal. A computing system is configured to enable users to model and manage operating system instances. Objects can be introduced into the box structure to at least one closable opening at a distance from the inner wall. Ar\ue00cN\u2550N\u2014Cp)n\u2003\u2003general formula <<1>> . When the values from the most significant digit to an -th digit in the -digit calculation result are zero, with respect to an addition or subtraction, the CPU corrects an n-digit calculation result of the addition or subtraction to zero.