Abstract: When two motors are in a locked state in which electric current is flowed in a concentrated manner in a specific phase in the two motors, a lock protection control is performed to rotate the two motors to change over a phase in which electric current is flowed in a concentrated manner in the two motors. The lock protection control rotates the two motors such that a vehicle is turned.

Abstract: A power supply system comprises a first battery, a second battery, an output electric circuit, a first switching element, a second switching element, and a third switching element. The output electric circuit includes a first electric circuit and a second electric circuit. The second electric circuit has a potential lower than a potential of the first electric circuit. The first, second and third switching elements are provided in series with each other from the first electric circuit toward the second electric circuit. The first battery is provided in parallel with the second switching element. The second battery is provided in parallel with a series connection between the second switching element and the third switching element.

Abstract: An electric power conversion system includes: a first battery; a second battery; an electric power converter including a plurality of switching elements, and configured to bidirectionally step up or step down electric power between an output line and each the first and second batteries in accordance with PWM signals; and a controller configured to control first and second step-up and step-down circuits by generating first and second PWM signals. The first and second step-up and step-down circuits are established between each first and second batteries and the output line. The first and second PWM signals are signals for controlling step-up and step-down operation of each first and second step-up and step-down circuit. The controller is configured to, when coupling on-duty periods of both the first and second PWM signals with each other, execute an overlap phase shift that partially overlaps the on-duty periods of the first and second PWM signals.

Abstract: A power supply system includes: a first battery; a second battery; a voltage converter including a plurality of switching elements; and a controller configured to turn on or off the plurality of switching elements in accordance with pulse width modulation control. The controller is configured to control phases of the pulse width modulation control signals such that the first high-level period of the first pulse width modulation control signal and the second high-level period of the second pulse width modulation control signal do not overlap with each other at a predetermined condition.

Abstract: When two motors are in a locked state in which electric current is flowed in a concentrated manner in a specific phase in the two motors, a lock protection control is performed to rotate the two motors to change over a phase in which electric current is flowed in a concentrated manner in the two motors. The lock protection control rotates the two motors such that a vehicle is turned.

Abstract: An electric vehicle includes: a first inverter circuit; a second inverter circuit; an inverter control device that outputs first switching signals to the first inverter circuit and second switching signals to the second inverter circuit; first signal lines that transfer the first switching signals to the first inverter circuit; second signal lines that transfer the second switching signals to the second inverter circuit; and a signal blocking circuit inserted in the first signal lines and the second signal lines, the signal blocking circuit being configured to output to the first inverter circuit first OFF signals in place of the first switching signals, and outputting to the second inverter circuit second OFF signals in place of the second switching signals, when receiving at least one of the first abnormality signal and the second abnormality signal.

Abstract: An electronic control unit of an electric power conversion system is configured to, when voltages of first and second batteries are stepped up in parallel and a temperature of a common switching element exceeds a threshold temperature, execute on time change control such that following conditions i) and ii) are satisfied: i) a trailing edge of one of the first and second PWM signals and a leading edge of the other one of the first and the second PWM signals connect with each other; and ii) the sum of the on time of the first and second PWM signals in a single PWM control period falls within a range from the single PWM control period to an allowable period. The electronic control unit is configured to change an on time of at least one of the first and second PWM signal in the on time change control.

Abstract: An electric vehicle includes: a first inverter circuit; a second inverter circuit; an inverter control device that outputs first switching signals to the first inverter circuit and second switching signals to the second inverter circuit; first signal lines that transfer the first switching signals to the first inverter circuit; second signal lines that transfer the second switching signals to the second inverter circuit; and a signal blocking circuit inserted in the first signal lines and the second signal lines, the signal blocking circuit being configured to output to the first inverter circuit first OFF signals in place of the first switching signals, and outputting to the second inverter circuit second OFF signals in place of the second switching signals, when receiving at least one of the first abnormality signal and the second abnormality signal.

Abstract: An electric power conversion unit of an electric power converter establishes two converter circuits including four switching elements and two batteries and carries out electric power conversion in a parallel mode in which the batteries are connected in parallel with each other. A controller is configured to set a control signal for each of the switching elements, identify a target switching element of which a temperature is suppressed, determine a state having a maximum loss value in correspondence with input-output data, and execute phase control for suppressing the maximum loss value.

Abstract: An electronic control unit of an electric power conversion system is configured to, when voltages of first and second batteries are stepped up in parallel and a temperature of a common switching element exceeds a threshold temperature, execute on time change control such that following conditions i) and ii) are satisfied: i) a trailing edge of one of the first and second PWM signals and a leading edge of the other one of the first and the second PWM signals connect with each other; and ii) the sum of the on time of the first and second PWM signals in a single PWM control period falls within a range from the single PWM control period to an allowable period. The electronic control unit is configured to change an on time of at least one of the first and second PWM signal in the on time change control.

Abstract: In the case where an on-fixation failure occurs in one of transistors of an inverter, a shutdown signal GSDWN or MSDWN is output as ON signal for a duration of adjusting time since switching of a fail signal GFINV or MFINV to ON signal. After elapse of the adjustment time, the shutdown signal GSDWN or MSDWN is switched to OFF signal. The adjustment time is set to be longer than a time duration until completion of shutdown of the inverter but to be shorter than a time duration until start of emergency drive control. This allows for cancellation of shutdown of the inverter even when an abnormal signal is continuously output due to a failure of a sensor or the like. This causes emergency drive to be more reliably performed with three-phase on-control including a transistor having an on-fixation failure after shutdown of the inverter.

Abstract: An electric power conversion unit of an electric power converter establishes two converter circuits including four switching elements and two batteries and carries out electric power conversion in a parallel mode in which the batteries are connected in parallel with each other. A controller is configured to set a control signal for each of the switching elements, identify a target switching element of which a temperature is suppressed, determine a state having a maximum loss value in correspondence with input-output data, and execute phase control for suppressing the maximum loss value.

Abstract: A power supply system includes: a first battery; a second battery; a voltage converter including a plurality of switching elements; and a controller configured to turn on or off the plurality of switching elements in accordance with pulse width modulation control. The controller is configured to control phases of the pulse width modulation control signals such that the first high-level period of the first pulse width modulation control signal and the second high-level period of the second pulse width modulation control signal do not overlap with each other at a predetermined condition.

Abstract: An electric power conversion system includes: a first battery; a second battery; an electric power converter including a plurality of switching elements, and configured to bidirectionally step up or step down electric power between an output line and each the first and second batteries in accordance with PWM signals; and a controller configured to control first and second step-up and step-down circuits by generating first and second PWM signals. The first and second step-up and step-down circuits are established between each first and second batteries and the output line. The first and second PWM signals are signals for controlling step-up and step-down operation of each first and second step-up and step-down circuit. The controller is configured to, when coupling on-duty periods of both the first and second PWM signals with each other, execute an overlap phase shift that partially overlaps the on-duty periods of the first and second PWM signals.

Abstract: A power supply system comprises a first battery, a second battery, an output electric circuit, a first switching element, a second switching element, and a third switching element. The output electric circuit includes a first electric circuit and a second electric circuit. The second electric circuit has a potential lower than a potential of the first electric circuit. The first, second and third switching elements are provided in series with each other from the first electric circuit toward the second electric circuit. The first battery is provided in parallel with the second switching element. The second battery is provided in parallel with a series connection between the second switching element and the third switching element.

Abstract: A resolver excitation circuit includes a D/A converter configured to generate a sinusoidal excitation signal being supplied to a resolver outputting a resolver signal to detect a rotation angle of a target object with a predetermined sampling frequency; and an amplifier configured to be constituted with an operational amplifier amplifying the excitation signal generated by the D/A converter. The operational amplifier has a gain-frequency characteristic set so that the predetermined sampling frequency is a higher frequency than a cutoff frequency of a gain of the operational amplifier, and the gain of the operational amplifier at the predetermined sampling frequency is lower than 0 dB.

Abstract: In the multi-monitor environment in which a plurality of monitors are connected to a PC, a human sensor is mounted on at least one monitor, and the PC controls the switching of the operation states of the plurality of monitors according to the detection result of the human sensor. When all the human sensors have detected the absence of the user, the monitors are operated in a sleep mode or a power OFF mode; and when at least one human sensor has detected the presence of the user, the monitors are operated in an ordinary operation mode.

Abstract: A method of manufacturing a liquid crystal display device, in which predetermined portions of two glass plates bonded to each other with a sealing member interposed therebetween and constituting the display device, can be cut without turning over the bonded two glass plates and without breaking necessary portions thereof. In the method of manufacturing the liquid crystal display device, first, an upper one of the bonded two glass plates is half cut from its upper surface with a blade, and unnecessary portions of the upper glass plate are removed by the use of a vacuum suction head. Thereafter, predetermined portions of exposed portions of a lower one of the bonded two glass plates are fully cut with the blade. In accordance with it, it is not necessary to turn over the the bonded two glass plates-to cut it into a plurality of units, and, therefore, a cutting process can be performed automatically.