Method for starting a rotor of a claw pole motor

A method of starting a rotor of a single-phase claw-pole motor, wherein the claw-pole motor comprises a permanently excited rotor having a plurality of detent positions, wherein the rotor performs movement in a running direction in nominal operation, comprises an electronically commutated stator, and comprises a Hall sensor for determining relative rotor position, wherein the method comprises the steps of:

• a. starting of the rotor by at least one commutation of a stator winding due to a Hall sensor signal;
• b. generating a plurality of commutations by means of pulse width modulated phase voltage based on the Hall sensor signal, wherein the Hall sensor is mounted on the stator or on an electronic circuit board and is arranged offset with respect to a center position of a stator pole in the direction of rotation,
• wherein when the rotor moves against the direction of travel, a phase offset is smaller than the Hall sensor offset.