Abstract: A variable frequency drive system includes a power converter (160a) with a plurality of power cells (16a1-16c3) supplying power to one or more output phases, each power cell having multiple switching devices, a plurality of sensors monitoring values of the power converter, and a control system (18) in communication with the power converter and controlling operation of the plurality of power cells, wherein the control system is configured via computer executable instructions to access and utilize a multi-dimensional response surface to obtain an internal coolant flow rate.

Abstract: An electric device (100) includes an arc quenching device (140), an arc fault rated cabinet (120) rated to resist an electric arc or short circuit, and an elastic support structure (200) configured to absorb energy based on electrodynamic forces in an arc fault event or a short circuit event. Further, an electric system and a method of calculating elasticity of an elastic beam (200-A, 200-B) configured to absorb energy of electrodynamic forces are described.

Abstract: An electric system (100) includes a plurality of electric devices (110), each electric device (110) having a cabinet (112), a common power source (130), each electric device (110) being electrically coupled to the common power source (130), wherein a first electric device (110-1) includes an arc fault rated cabinet (112-1) and an arc quenching device (114), and wherein, in an event of an electric arc occurring in any of the plurality of electric devices (110), energy of the are is transferred to the first electric device (110-1) and the arc quenching device (114) activated.

Abstract: A variable frequency drive system includes a power converter with a plurality of power cells supplying power to one or more output phases, each power cell having multiple switching devices incorporating semiconductor switches; a plurality of sensors monitoring values of the power converter; and a control system in communication with the power converter and controlling operation of the plurality of power cells, the control system comprising a processor configured via executable instructions to access a first reduced order model of the power converter; receive the values provided by the plurality of sensors; analyze the values in connection with the first reduced order model to determine one or more operating modes; and output one or more determined operating modes of the power converter.

Abstract: A variable frequency drive system includes a power converter with a plurality of power cells supplying power to one or more output phases, each power cell having multiple switching devices incorporating semiconductor switches; a plurality of sensors monitoring values of the power converter; and a control system in communication with the power converter and controlling operation of the plurality of power cells, the control system comprising a processor configured via executable instructions to access a first reduced order model of the power converter; receive the values provided by the plurality of sensors; analyze the values in connection with the first reduced order model to determine one or more operating modes; and output one or more determined operating modes of the power converter.

Abstract: An integrated air cooling and arc resistant system is provided for a voltage drive. The system comprises a cabinet including a back, an upper portion and a lower portion. The system further comprises a plurality of power cells disposed in the cabinet. The system further comprises a central chimney vertically disposed in the cabinet. The system further comprises a transformer disposed in the cabinet and being underneath the plurality of power cells. The transformer has a top end and a bottom end. The system further comprises a vertical plenum disposed in the back of the cabinet. The vertical plenum is configured to flow cool air passing from the plurality of power cells towards the bottom end of the transformer.

Abstract: An integrated air cooling and arc resistant system is provided for a voltage drive. The system comprises a cabinet including a back, an upper portion and a lower portion. The system further comprises a plurality of power cells disposed in the cabinet. The system further comprises a central chimney vertically disposed in the cabinet. The system further comprises a transformer disposed in the cabinet and being underneath the plurality of power cells. The transformer has a top end and a bottom end. The system further comprises a vertical plenum disposed in the back of the cabinet. The vertical plenum is configured to flow cool air passing from the plurality of power cells towards the bottom end of the transformer.

Abstract: An electrical contact assembly includes a contact apparatus with stationary first and second contact members, a movable contact member having a generally planar profile and an armature operable to produce a force to cause the movable contact member to remain closed upon application of current through the first contact member, the movable contact member, and second contact member, and an actuator mechanism coupled to a side of the movable contact member and adapted to open and close the contact apparatus.