A motor controller 100-1 includes an inverter 23, a current detection unit 24, and a current detector 27. The motor controller includes a duty-cycle setting unit 31 that sets a duty cycle of each of a first PWM signal, a second PWM signal, and a third PWM signal, based on a corresponding detected value for a given phase. The motor controller includes a PWM signal generator 32. The PWM signal generator 32 adjusts, upon occurrence of a condition in which a given setting value changes, a time sequence order of timings at which the first PWM signal, the second PWM signal, and the third PWM signal respectively change after a change in the given setting value, to be the same as a time sequence order of timings at which the first PWM signal, the second PWM signal, and the third PWM signal respectively change prior to the change in the given setting value, so that a first energization time period and a second energization time period are ensured within half of one period of the carrier. The first energization time period has an energization width in which the current detector enables detecting of a given phase current for any one of phases. The second energization time period has an energization width in which the current detector enables detecting of a given phase current for any one of the phases.