A power control method for supplying AC power to a first load and a second load is provided. The method includes supplying, to the first load, AC power corresponding to a range of a phase angle 0 to a phase angle φ1 in each half cycle; and supplying, to the second load, AC power corresponding to a range of a phase angle φ2 to a phase angle π in each half cycle, wherein φ1 is larger than 0 and not more than π, φ2 is not less than 0 and smaller than π, and φ1 is larger than φ2.