Power inverter for use with a hair styling or hair care appliance

A power inverter comprising:

• an input for connection to a DC voltage;
• a first inductor and a second inductor, each of the first and the second inductors having a first terminal connected to the input and a second terminal;
• a first switch having a first terminal connected to the second terminal of the first inductor and a second terminal connected to a ground;
• a second switch having a first terminal connected to the second terminal of the second inductor and a second terminal connected to the ground;
• a first capacitor connected in parallel to the first switch;
• a second capacitor connected in parallel to the second switch;
• a first network having a first terminal connected to the first terminal of the first switch and a second terminal connected to the first terminal of the second switch, the first network comprising a third capacitor, a third inductor and a fourth capacitor connected in series;
• a fourth inductor having a first terminal connected to the first terminal of the first network and a second terminal;
• a fifth inductor having a first terminal connected to the second terminal of the first network and a second terminal;
• a fifth capacitor having a first terminal connected to the second terminal of the fourth inductor, and a second terminal connected to the second terminal of the fifth inductor;
• a second network having a first terminal connected to the first terminal of the fifth capacitor and a second terminal connected to the second terminal of the fifth capacitor, the second network comprising a first sub-network, an output capacitor, and a second sub-network connected in series, wherein each of the first and second sub-networks comprises a capacitor and an inductor connected in series;
• a pair of outputs, each one of the pair of outputs connected to a respective terminal of the output capacitor;
• and
• a controller for controlling the first and second switches, wherein the first network has a resonant frequency of ω1, the controller switches the first and second switches at a switching frequency of ωS, and a ratio of ω1/ωS is 0.64±20%.