The Aams motor is an example of a claimed perpetual motion or "over unity device" capable of producing more energy than is supplied to it. Such claims are generally viewed as pseudoscience by mainstream scientists. It is clear that functional electric motors can be built by following his design principles, but claims of greater than 100% efficiency are met with skepticism and rejection. At a 1994 meeting, several such motors were demonstrated, but according to supporters "none of the motors present were of sufficient engineering quality to manifest the elusive over-unity effect."