Throttle drive actuator for an engine

A method of operating an engine with a throttle drive actuator, the method comprising:

• biasing a throttle valve of a throttle body into a first position with a biasing member attached to a throttle shaft, the throttle shaft coupled to the throttle valve and the biasing member operatively connected to the throttle shaft;
• providing a first magnetic field via a first field source, a second magnetic field via a second field source, and an armature located between the first field source and the second field source, the first field source having a first north pole and a first south pole, the second field source having a second north pole and a second south pole, the second south pole positioned opposite the first north pole and the second north pole positioned opposite the first south pole such that a direction of the second magnetic field is opposite a direction of the first magnetic field, the armature comprising a coupler connected to the throttle shaft and a winding movable along an arcuate path intermediate the first field source and the second field source, the winding comprising an arcuate projection extending to one side of the coupler without extending to an opposite side of the coupler;
• and
• energizing the winding of the armature to cause the armature to rotate along the arcuate path,
• wherein the rotation of the armature causes the throttle shaft to rotate, thereby causing the throttle valve to move into a second position to open or close an air passage of the throttle body.