Resonant electrical machine

Driving circuitry for a stator of an electrical machine includes a first winding 526 and a first capacitor 523 arranged in series with one another in a first branch and arrange in parallel with a second winding 524. The driving circuitry further includes a second capacitor 525 arranged in series with both the first and second windings. The combination of the second capacitor and the second winding may have an electromagnetic resonant frequency. The driving circuitry may be compatible with a single-phase AC power supply 522 to generate increased output torque at a particular driving frequency. A switch 529 may be arranged to connect the first branch to the power supply. The switch may be a centrifugal switch configured to disconnect the first winding and the first capacitor from the power supply based on a rotational speed of a rotor of the electrical machine. The rotor may be a squirrel-cage rotor and may have an air-core or a core formed of a magnetic material.