Abstract: A control apparatus for an alternating-current motor that is driven by an inverter includes a rectangular wave voltage control portion that generates a control command of the inverter such that rectangular wave voltage that has been phase-controlled to make the alternating-current motor operate according to a torque command value is applied to the alternating-current motor; and a phase change control portion that controls a change in the phase to maintain the center of a flux linkage vector locus indicative of a change in a flux linkage of the alternating-current motor before and after a change in the phase of the rectangular wave voltage.

Abstract: In a control of an AC motor that uses a PWM control and a rectangular-wave control, when switching is conducted from the rectangular-wave control to the PWM control, a current command generated in a current command generation unit is corrected so as to smooth the variations in a time axis direction on the basis of a target torque command value by taking the final current state in the rectangular-wave control immediately prior to switching as an initial value, thereby generating a current command after the correction. An inverter is current feedback-controlled based on the current command after the correction. As a result, the continuity from the current state immediately prior to switching of the rectangular-wave control can be ensured for the current command in the PWM control.

Abstract: When a target operation point of either a motor MG1 or a motor MG2 is included in a resonance range specified by operation points of the motor MG1 or the motor MG2 in the occurrence of resonance in a booster converter, a hybrid vehicle controls the booster converter to make the voltage on the side of inverters approach to a preset target boosted voltage that is higher than the voltage on the side of the battery, while controlling the inverters by sine-wave control.

Abstract: A method is provided for building an information network via an antenna terminal or an antenna cable disposed in a house for receiving television broadcasting or radio broadcasting. The method comprises step (a) of selecting at least one frequency not used by television broadcasting or radio broadcasting in an area where the house is located; step (b) of modulating a carrier wave having the frequency selected in step (a) by using transmission data transmitted from a first information terminal and transmitting the modulated carrier wave via the antenna terminal or the antenna cable; and step (c) of receiving the carrier wave transmitted in step (b) and demodulating the carrier wave to produce reception data received by a second information terminal.

Abstract: A method is provided for building an information network via an antenna terminal or an antenna cable disposed in a house for receiving television broadcasting or radio broadcasting. The method comprises step (a) of selecting at least one frequency not used by television broadcasting or radio broadcasting in an area where the house is located; step (b) of modulating a carrier wave having the frequency selected in step (a) by using transmission data transmitted from a first information terminal and transmitting the modulated carrier wave via the antenna terminal or the antenna cable; and step (c) of receiving the carrier wave transmitted in step (b) and demodulating the carrier wave to produce reception data received by a second information terminal.