Control device and control method of boost converter

摘要

A control device (10) of a boost converter which includes: an inverter circuit (14A) which controls switching to apply current to a stator winding of respective phases of a multi-phase brushless DC motor (12); and a boost circuit (16A) which is provided on an input side of the inverter circuit (14A) and has at least a reactor (16a) and a switching element (16b), and controls ON and OFF states of the switching element (16b) of the boost circuit (16A) on the basis of a boost voltage command which is a command for boost voltage output from the boost circuit (16A), the control device (10) comprises a boost voltage command setting unit (29) which sets the boost voltage command on the basis of counter electromotive voltage of the brushless DC motor (12) and a torque command for the brushless DC motor (12).