Engine generator comprising an electrical load-dependent delta to WYE switching unit

An engine generator, comprising:

• a general purpose engine, an engine speed of the engine being configured to be variably controlled;
• a generator unit having a three-phase winding and configured to be driven by the engine to generate power;
• an inverter unit configured to convert alternating current output from the generator unit to alternating current of a predetermined frequency to output to a load;
• a connection switching unit configured to switch a connection configuration of the winding to one of a wye-connection and a delta-connection;
• a load detection unit configured to detect a power consumption of the load;
• and
• a CPU and a memory coupled to the CPU, wherein
• the CPU and the memory are configured to perform
• controlling the connection switching unit to switch the connection configuration to the wye-connection when the power consumption of the load detected by the load detection unit is equal to or lower than a predetermined value, and to switch the connection configuration to the delta-connection when the power consumption of the load detected by the load detection unit is higher than the predetermined value.