Energy conversion wheel introduction: The energy conversion wheel in the exhibition area shows its working principle. It turns out that electrical energy can be converted into magnetic energy by electromagnets, and generates magnetic force with the permanent magnets in the wheel. The magnetic force drives the wheel to rotate, realizing the conversion of magnetic energy into mechanical energy. The rotating wheel in turn moves the fixed magnetic field of the permanent magnet, causing the closed coil to generate an induced current, which lights up the small bulb and converts it into light energy.