IEEE Transactions on Industrial Electronics

This paper proposes a new application for the rotary VCM.In developing a low cost ultrasound scanner for the developing world an oscillating transducer is required to sweep over the skin.The ultrasound scanner must operate from a USB power supply in remote locations.The application requires a 3.3N force on the coils of the motor to overcome the inertia of the skin.A proof of concept prototype motor with electronics has been designed, simulated and tested.The VCM optimisation is discussed in detail with the unique separation of the magnets being critical to reduce the axial bearing forces for this application.