Control unit for a boost converter device

A boost converter device comprising:

• a boost converter which includes a reactor and a switching element and can boost and output a voltage which is input from a battery;
• a current sensor which detects a reactor current flowing through the reactor;
• and
• a control unit which controls the boost converter by using feedback control of the reactor current,
• wherein the control unit
• executes at least one of reducing a carrier frequency which is used in the control of the boost converter and reducing a duty command value which is used in the control of the boost converter,
• detects an amplitude of a current ripple by the current sensor when the reduction of the carrier frequency or the reduction of the duty command value is being executed, and
• detects the current sensor as being abnormal in a case where the amplitude of the current ripple is less than a predetermined current fluctuation range at the time of abnormality of the current sensor.