SYSTEM AND METHOD UTILIZING A SOLID STATE POWER CONTROLLER (SSPC) FOR CONTROLLING AN ELECTRICAL LOAD OF A VARIABLE FREQUENCY THREE-PHASE POWER SOURCE

摘要

A solid state power controller (SSPC) ( 100 ) includes a power switching controller ( 30 ) and power switching devices (PSDs) ( 20 A, 20 B, 20 C) for controlling each phase of a multiple-phase load to switch-on or -off at a zero-crossing point of a corresponding phase of a multiple-phase power source. The power switching controller ( 30 ) may include an ASIC ( 25 A, 25 B, 25 C) for controlling each PSD ( 20 A, 20 B, 20 C) to switch the corresponding load phase on or off. The ASIC ( 25 A, 25 B, 25 C) may be configured to control the PSD ( 20 A, 20 B, 20 C) to switch-on the load phase at a detected zero-crossing point of the voltage supplied by the corresponding phase of the power source, and to switch-off the load phase at a detected zero-crossing point of the load current supplied by the corresponding phase of the power source.