A rotary transformer for an electrical machine includes a rotary printed circuit board and a stator printed circuit board. The rotary printed circuit board is operatively connected to the stator printed circuit board for relative rotation with respect to the stator printed circuit board. A conductor is fixed to the one of the printed circuit boards and includes a spiral coil for transferring electrical energy between the rotary printed circuit board and stator printed circuit board.

An electrical controller for electric rotating machines is provided. A control system for electric rotating machines transmits a controlled quantity of current to or from different windings of the electric rotating machine at any given time. Furthermore, the amplitude of the current is independently variable of the timing and duration of the transmission of the current to or from the windings. This allows increased control of the electric rotating machine and facilitates the operation of the electric motor at high mechanical and/or electrical speeds.

An electrical controller for electric rotating machines is provided. A control system for electric rotating machines transmits a controlled quantity of current to or from different windings of the electric rotating machine at any given time. Furthermore, the amplitude of the current is independently variable of the timing and duration of the transmission of the current to or from the windings. This allows increased control of the electric rotating machine and facilitates the operation of the electric motor at high mechanical and/or electrical speeds.

A variable magnetization machine control system comprising a controller configured to adjust a d-axis current waveform and a q-axis current waveform in accordance with an operating condition of a variable magnetization machine to generate an adjusted d-axis current waveform and an adjusted q-axis current waveform that provide a driving voltage to drive the variable magnetization machine at a predetermined speed while maintaining the driving voltage below a predetermined maximum magnitude.

A variable magnetization machine control system comprising a controller configured to adjust a d-axis current waveform and a q-axis current waveform in accordance with an operating condition of a variable magnetization machine to generate an adjusted d-axis current waveform and an adjusted q-axis current waveform that provide a driving voltage to drive the variable magnetization machine at a predetermined speed while maintaining the driving voltage below a predetermined maximum magnitude.

A converter includes one chip constituted a switching device and a diode. An electronic control unit is configured to calculate a temperature estimated value of the switching device from control conditions of the converter, restrict a control upper-limit value of charge power or discharge power of a battery, when a detection value of a temperature sensor is higher than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the diode, and restrict a control upper-limit value of charge power or discharge power of the battery, when the detection value of the temperature sensor is lower than the temperature estimated value of the switching device, and the detection value of the temperature sensor exceeds a protection temperature of the switching device.

A field winding type synchronous machine connects to a DC line and includes a rotor; a stator; an exciter that passes a current through a field winding of the rotor; and a rectification circuit that rectifies an output from the exciter and provides the output to the DC line. The synchronous machine includes the field winding being connected in parallel to a first circuit in which a parallel circuit including a rectifier element and a first switchgear is connected in series to a discharge resistor, a second switchgear being connected in series to the DC line that connects the first circuit to the rectification circuit, and a capacitor being provided between the discharge resistor and the input side of an electric power source element for gating the first switchgear.

A field winding type synchronous machine connects to a DC line and includes a rotor; a stator; an exciter that passes a current through a field winding of the rotor; and a rectification circuit that rectifies an output from the exciter and provides the output to the DC line. The synchronous machine includes the field winding being connected in parallel to a first circuit in which a parallel circuit including a rectifier element and a first switchgear is connected in series to a discharge resistor, a second switchgear being connected in series to the DC line that connects the first circuit to the rectification circuit, and a capacitor being provided between the discharge resistor and the input side of an electric power source element for gating the first switchgear.

A synchronization signal generating portion of a transmitter microcomputer generates a synchronization signal that is synchronized with a drive timing of the own microcomputer and also causes to synchronize the drive timing of microcomputers, and transmits to a receiver microcomputer. A timing corrector of the receiver microcomputer is capable of correcting the drive timing of the own microcomputer so as to synchronize with the received synchronization signal, and includes a timing determiner which determines whether the received synchronization signal is normal or abnormal. The receiver microcomputer permits the timing correction if the synchronization signal is determined to be normal in the timing determination, and prohibits timing correction and drives the motor asynchronously with the transmitter microcomputer if the synchronization signal is determined to be abnormal.

A synchronization signal generating portion of a transmitter microcomputer generates a synchronization signal that is synchronized with a drive timing of the own microcomputer and also causes to synchronize the drive timing of microcomputers, and transmits to a receiver microcomputer. A timing corrector of the receiver microcomputer is capable of correcting the drive timing of the own microcomputer so as to synchronize with the received synchronization signal, and includes a timing determiner which determines whether the received synchronization signal is normal or abnormal. The receiver microcomputer permits the timing correction if the synchronization signal is determined to be normal in the timing determination, and prohibits timing correction and drives the motor asynchronously with the transmitter microcomputer if the synchronization signal is determined to be abnormal.