Experimental sample of a device for symmetring current and voltage of a low-power electric generator when operating on a single-phase load

An unbalanced load causes mechanical vibrations in the generator rotor and overheating. Ultimately, this leads to a reduced service life or failure of the generator. Balancing devices, rational load distribution between phases, and other measures are used to reduce unbalance. Methods and devices for monitoring generator load for timely response to unbalance are also proposed. All these measures are not without drawbacks and allow for varying degrees of unbalance. A method is considered that involves installing three-phase and single-phase inverters at the generator input. These inverters sequentially convert voltage from three-phase alternating current (AC) to direct current (DC) and then to three-phase or single-phase AC, respectively. This allows for symmetrical current and voltage at the generator input, regardless of the connected load unbalance. To partially implement the method, an experimental inverter device was developed that enables the connection of a single-phase load to a three-phase generator with a power exceeding the permissible single-phase rating, or even comparable to the generator's three-phase rating. Preliminary laboratory tests of the device were conducted, confirming its functionality and demonstrating high efficiency values reaching over 95%.