Abstract: An exciter comprises a stator armature defining a plurality of circumferentially spaced apart winding slots separated by respective stator teeth. first exciter winding with multiple phases, a second exciter winding with multiple phases. The individual windings of the first and second exciter windings are seated in the winding slots. For each phase of each of the first and second exciter windings there are two leads configured to connect to a generator control unit (GCU).

Abstract: A battery cell system includes a plurality of battery cells having an annular shape abutting one another to form a battery cell stack with an annular shape to facilitate cooling. The battery cell system includes a stack interface having an annular housing operatively connected to the plurality of battery cells. A cooling loop is defined about the battery cell stack and the stack interface and through central through holes of the battery cell stack and the stack interface.

Abstract: An assembly includes a circuit card assembly (CCA) module including a CCA with heat generating electronic components and a connector electrically connected to the heat generating electronic components. A chassis including an electrical interface is included. The connector of the CCA module is electrically connected to the electrical interface. The chassis includes a removable cover. A heat transfer element is included between the cover of the chassis and an edge of the CCA module for heat sinking heat from the heat generating electronic components through the heat transfer element to the cover of the chassis.

Abstract: In accordance with at least one aspect of this disclosure, a pump selector system can include a primary pump fluidly connected to provide a primary flow to a fluid destination, a secondary pump fluidly connected to provide a secondary flow to the fluid destination, and a selector valve disposed downstream of the primary pump and the secondary pump. The selector valve can be configured to toggle between a first position configured to allow flow from the primary pump to flow to the fluid destination and to block flow from the secondary pump to the fluid destination, and a second position configured to allow flow from the secondary pump to flow to the fluid destination and to block flow from the primary pump to the fluid destination.

Abstract: In accordance with at least one aspect of this disclosure, a method for pulse width modulation control includes resolving a reference vector for any number of active space vectors to determine a voltage offset for the reference vector, adding the voltage offset to each active vector to determine a modified modulated signal to be added to a carrier signal, and controlling, with a control module, a switching circuit based at least in part on the modified carrier signal.

Abstract: A pulse width modulator (PWM) of a multi-phase power converter is provided. The PWM includes a signal modulator that corresponds to each phase of the converter. Each signal modulator of the PWM is configured to receive a unique triangle carrier signal, receive a unique sine wave signal, compare the received triangle carrier signal and the received sine wave signal, and output at least one control signal based on a result of the comparison. The control signal controls an inverter that applies pulse width modulation to a DC power for converting the DC power to a multi-phase power, AC harmonics of the multi-phase power filtered by a common mode inductor.

Abstract: A pulse width modulator (PWM) of a multi-phase power converter is provided. The PWM includes a signal modulator that corresponds to each phase of the converter. Each signal modulator of the PWM is configured to receive a unique triangle carrier signal, receive a unique sine wave signal, compare the received triangle carrier signal and the received sine wave signal, and output at least one control signal based on a result of the comparison. The control signal controls an inverter that applies pulse width modulation to a DC power for converting the DC power to a multi-phase power, AC harmonics of the multi-phase power filtered by a common mode inductor.