I use a 1.2 / 2.4 kW fan heater which is switched on and off via a 20 Amps IPR relay, which is driven via a 1 second electro mechanical timer. ( just a synchronous motor with a camwheel which turns around in 2 seconds ) which turns it on for one second and turns it off for one second and so on. It gives me a pulsating test load from 4.8 or 9.5 amps, and works very well
The product of rotation, excitation and flux produces electricty.
