A personal injection device wearable by a user to deliver fluid from a reservoir to the user, the personal injection device including: a quartz oscillator operable to generate a constant frequency signal a control circuit operably connected to the quartz oscillator, the control circuit being operable to generate a drive signal in response to the constant frequency signal a stator operably connected to the control circuit and defining a rotor gap, the stator being operable to generate an oscillatory field in the rotor gap in response to the drive signal a magnetic rotor disposed in the rotor gap, the magnetic rotor being operable to rotate in response to the oscillatory field and a pump operably connected to the magnetic rotor, the pump being operable to move the fluid from the reservoir to the user in response to the rotation of the magnetic rotor.
