A New Brushless AC Electromagnetic Generator Design Using an Experimental and Design Optimization Approach

This paper presents a new brushless alternating current electromagnetic energy generator using an experimental/theoretical and design optimization approach. This type of generator can be used in low-voltage, low-power systems such as in energy harvesting applications. The generator consists of a new structure with the detachable rotor arrangement mainly comprising of the powerful Neodymium rare-earth magnets with a back core on an adjustable height rotor shaft and a stator made up of top and bottom flanges and a single continuous coil arrangement. The special stator and rotor arrangements are optimized for variable speed and variable output power operations. It has a variable air-gap setting between the stator and the rotor which controls the initial amount of torque required to move the rotor which in turn controls the amount of generated output voltage. The finite-element modeling magnetics tool was used in the simulation for the optimization of the new brushless generator design concept.