T07.9 - Un-Terminated Blackbox Modeling for Electric Machines

With the increasing penetration of power electronics in power systems, small-signal impedance-based design and stability evaluation have become widely accepted at the system level. Because it does not require detailed information about the physical components and control loops, allowing for blackbox characterization. Typically, impedance measurement is conducted at the interfaces among subsystems and encompasses all dynamics from upstream or downstream, necessitating time-consuming re-measurements after any system variation. To overcome the need for re-measurements and maintain intellectual property for manufacturers through the blackbox approach, the un-terminated terminal behavior model (TBM) is introduced in this paper. This model pertains solely to the devices under test, remaining unaffected by the source side's output impedance and the load side's input impedance. In the rotor flux-orientated d-q domain, this paper presents analysis and procedures for source-load impedance decoupling to measure the un-t