An aircraft power generation unit to generate power provided to a load includes a permanent magnet generator (PMG) that includes first, second, third and fourth sets of windings, each of the winding sets including three windings and a control coil and a rectifier section that includes first through third six pulse rectifiers, a DC to DC to converter and a common local output bus. The unit also includes an output bus configured to be connected to the load and including a positive output bus rail and a negative output bus rail, wherein the negative output bus rail is connected to the negative output of the DC to DC converter and a controller that receives an input signal from at least one of the output sets and selectively couples the DC to DC converter and one or more of the first, second and third six-pulse rectifiers to the output bus.

An example system includes a gas-turbine configured to generate mechanical energy using fuel; an electrical generator configured to generate electrical energy using the mechanical energy generated by the gas-turbine; an electrical converter configured to process the electrical energy generated by the electrical generator; and a converter controller configured to reduce, responsive to detecting occurrence of a fault in the electrical generator or the electrical converter, an amount of fuel provided to the gas-turbine.

An example system includes a gas-turbine configured to generate mechanical energy using fuel; an electrical generator configured to generate electrical energy using the mechanical energy generated by the gas-turbine; an electrical converter configured to process the electrical energy generated by the electrical generator; and a converter controller configured to reduce, responsive to detecting occurrence of a fault in the electrical generator or the electrical converter, an amount of fuel provided to the gas-turbine.

A flexible intelligent electrical switching device with multi-function capability, and methods of use are presented herein which provide an autonomous, reconfigurable switching device. The present disclosure is specifically designed to reduce space, cost of manufacture, efficiency, installation reduction time and ease of implementation.

Provided is an inverter-integrated rotating electric machine capable of suppressing an influence of electromagnetic noise between a peripheral device and a control circuit board. An inverter-integrated rotating electric machine (1A) includes: a rotating electric machine main body (2); and an inverter device (3A), which is provided to the rotating electric machine main body (2). The inverter device (3A) includes: a heat sink (32) configured to cool switching elements (31); a control circuit board (33), which is provided so as to be opposed to the heat sink (32), and includes a drive circuit configured to drive the switching elements (31); and a metal shield plate (34), which is provided so as to be opposed to the control circuit board (33) in such a manner that the control circuit board (33) is arranged between the metal shield plate (34) and the heat sink (32), and is electrically connected to the heat sink (32).

Provided is an inverter-integrated rotating electric machine capable of suppressing an influence of electromagnetic noise between a peripheral device and a control circuit board. An inverter-integrated rotating electric machine (1A) includes: a rotating electric machine main body (2); and an inverter device (3A), which is provided to the rotating electric machine main body (2). The inverter device (3A) includes: a heat sink (32) configured to cool switching elements (31); a control circuit board (33), which is provided so as to be opposed to the heat sink (32), and includes a drive circuit configured to drive the switching elements (31); and a metal shield plate (34), which is provided so as to be opposed to the control circuit board (33) in such a manner that the control circuit board (33) is arranged between the metal shield plate (34) and the heat sink (32), and is electrically connected to the heat sink (32).

A door, in particular a high-speed industrial door, with an intelligent door leaf is disclosed. The door has a door leaf which is guided by lateral guides and covers a door opening, and which has a first and a second side, a driving means for moving the door leaf between an open and a closed position, a door control means for controlling the driving means, as well as an electrically self-sufficient door leaf means arranged in the door leaf. The door control means also has a first communication unit. In addition, the door leaf device comprises at least one sensor unit for detecting at least a physical quantity, an energy converter which converts non-electrical energy into electrical energy, a second communication unit and at least one actuator unit. The first and second communication units communicate wirelessly with each other.

An air-conditioning apparatus includes: a plurality of compressors included in one or more refrigerant circuits which air-condition a target space to be air-conditioned; a power converter which converts electric power supplied from a power source unit and supply the compressors with electric power for driving the compressors at an arbitrary drive rotation speed; a switching device which perform switching between a power supplying operation to cause each of the compressors to be supplied with electric power from the power converter and a power supplying operation to cause each of the compressors to be supplied with electric power directly from the power source unit; and a controller which controls the power converter and the switching device.

An air-conditioning apparatus includes: a plurality of compressors included in one or more refrigerant circuits which air-condition a target space to be air-conditioned; a power converter which converts electric power supplied from a power source unit and supply the compressors with electric power for driving the compressors at an arbitrary drive rotation speed; a switching device which perform switching between a power supplying operation to cause each of the compressors to be supplied with electric power from the power converter and a power supplying operation to cause each of the compressors to be supplied with electric power directly from the power source unit; and a controller which controls the power converter and the switching device.

A control unit distributes a motor voltage vector corresponding to an output request for a motor to a first and a second inverter voltage vectors associated with outputs from a first inverter and a second inverter, and determines whether a switching condition for three-phase-on mode is satisfied. Determining that the switching condition is satisfied, the control unit switches to three-phase-on mode in which every high-side switching element or every low-side switching; element of one inverter is turned on and one end of a coil in each phase of the motor is brought into common connection, and the control unit drives the motor with an output from the other inverter. Herein, the switching condition for three-phase-on mode includes failure of one inverter and an inverter voltage vector of an output from one inverter being approximate to 0 when neither of the inverters fails.