In a system and method for operating a system, which includes a first inverter which feeds a first electric motor, and a second inverter which feeds a second electric motor, the DC-voltage side connection of the first inverter is connected to the DC-voltage side connection of a rectifier which is supplied from an electrical AC-voltage supply network, the DC-voltage side connection of the second inverter is connected to the DC-voltage side connection of the rectifier, in particular, the two DC-voltage side connections of the inverters are switched in parallel, and a controller is provided, in particular in the first inverter, which controls the current accepted and acquired by the first inverter at its DC-voltage side terminal toward a setpoint value in that the torque of the first electric motor fed by the first inverter is the controlled variable.

A system includes multiple hybrid energy storage modules (HESMs) configured to accept constant-current DC input power from a main power source. Each HESM has a plurality of outputs configured to sequentially or simultaneously provide both constant-current and constant-voltage output power to multiple loads, the loads comprising steady state, pulsating, or intermittent loads. Each HESM comprises a combined rotating electrical machine-inertial storage module and electro-chemical storage module configured to generate second power that augments or induces first power derived from the main power source, so as to permit constant power draw or constant current draw from the main power source, wherein the output power comprises the first power and the second power.

A system includes multiple hybrid energy storage modules (HESMs) configured to accept constant-current DC input power from a main power source. Each HESM has a plurality of outputs configured to sequentially or simultaneously provide both constant-current and constant-voltage output power to multiple loads, the loads comprising steady state, pulsating, or intermittent loads. Each HESM comprises a combined rotating electrical machine-inertial storage module and electro-chemical storage module configured to generate second power that augments or induces first power derived from the main power source, so as to permit constant power draw or constant current draw from the main power source, wherein the output power comprises the first power and the second power.

Disclosed herein are methods and systems for modeling and controlling the disparate components (e.g. generators, storage, propulsors, and power electronics) that comprise an aircraft turbo-electric distributed power (TeDP) system. The resulting control system is hierarchical and interactive. Layer one is the physical electric power system. Layer three is an optimization system that determines set points for system operation. Layer two, in between layer one and layer three, includes nonlinear, fast, dynamic power-electronic controllers that hold the operation of the power system to the desired set points. Communication between these layers ensures feasibility and stability of the controlled operation. Simulations demonstrate that the resulting control system ensures stability and maximum efficiency.

Disclosed herein are methods and systems for modeling and controlling the disparate components (e.g. generators, storage, propulsors, and power electronics) that comprise an aircraft turbo-electric distributed power (TeDP) system. The resulting control system is hierarchical and interactive. Layer one is the physical electric power system. Layer three is an optimization system that determines set points for system operation. Layer two, in between layer one and layer three, includes nonlinear, fast, dynamic power-electronic controllers that hold the operation of the power system to the desired set points. Communication between these layers ensures feasibility and stability of the controlled operation. Simulations demonstrate that the resulting control system ensures stability and maximum efficiency.

A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine input stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.

A hybrid energy storage system is configured to control pulsed power. A first dynamo-electric machine is coupled to an inertial energy storage device and has multiple input stator windings configured to accept input power from a source. A polyphase output stator winding is configured to deliver electric power having a first response time to a DC bus. A secondary energy storage system is coupled to the DC bus and is configured to convert its stored energy to electric power in a bidirectional manner. A second dynamo-electric machine has an input stator winding and at least one polyphase output stator winding coupled to a converter, the converter coupled to a DC output. A polyphase boost exciter is configured to derive energy from the DC bus and excite the second machine input stator winding, wherein the second machine is configured to be excited at a faster rate than the first response time of the first machine.

A motor drive system includes a converter configured to convert power between AC power in a power source and DC power in a DC link, an inverter for drive configured to convert power between the DC power and AC power in a servomotor for drive, a motor control unit for drive configured to control the servomotor for drive, a power storage device configured to store the DC power from the DC link or supplies the DC power to the DC link, and a determination unit configured to determine whether the holding energy of the power storage device is lower than a threshold for energy shortage determination, wherein when the holding energy is lower than the threshold for energy shortage determination, the motor control unit for drive controls the servomotor for drive by setting an additional standby period in which the servomotor for drive is inactive in a predetermined operation pattern.

A motor controller includes an AC-to-DC converter that converts AC power from an AC power source into DC power and supplies the DC power to a DC bus line, an auxiliary power source that charges the DC bus line with the DC power and discharges the DC power from the DC bus line, and a first inverter that controls power supply to a motor using the DC power from the DC bus line. The auxiliary power source includes a rotating electrical machine, a flywheel connected to the machine, a second inverter that supplies power to the machine using the DC power on the DC bus line and regenerates the power from the machine into the DC power on the DC bus line, and control circuitry that controls the second inverter to cause rotational angle velocity of the flywheel to keep positive correlation with bus-to-bus voltage of the DC bus line.

A motor controller includes an AC-to-DC converter that converts AC power from an AC power source into DC power and supplies the DC power to a DC bus line, an auxiliary power source that charges the DC bus line with the DC power and discharges the DC power from the DC bus line, and a first inverter that controls power supply to a motor using the DC power from the DC bus line. The auxiliary power source includes a rotating electrical machine, a flywheel connected to the machine, a second inverter that supplies power to the machine using the DC power on the DC bus line and regenerates the power from the machine into the DC power on the DC bus line, and control circuitry that controls the second inverter to cause rotational angle velocity of the flywheel to keep positive correlation with bus-to-bus voltage of the DC bus line.