Toyota Jidosha Kabushiki Kaisha

Kojiro Asakawa

Kazuhito Hayashi

Ikuhiro Nakamura

Daigo Nobe

A system of an interconnected inverter includes an inverter that converts DC power from a DC power supply into AC power and provides AC power to an AC power line, an RDC that converts a voltage value obtained by a voltage sensor into electrical angle information that shows a phase angle of an output voltage, the voltage sensor obtaining a voltage value of an output voltage from the inverter to a power grid, and an ECU that controls the inverter to provide an alternating current in synchronization with an alternating current that flows through the AC power line by using timing at which an angle shown in the electrical angle information given from the RDC attains to a prescribed angle. Extra cost for diversion can be reduced.

Interconnected inverter and method of manufacturing interconnected inverter

An interconnected inverter system includes an inverter circuit that converts DC power from a DC power supply into AC power and provides AC power to an AC power line, a voltage sensor that detects a voltage of DC power on a DC power supply side of the inverter circuit, a DC current sensor that detects a current of DC power on the DC power supply side of the inverter circuit, and a motor ECU that controls the inverter circuit. The motor ECU calculates actual power of AC power provided from the inverter circuit by using a product of a voltage value detected by the voltage sensor and a current value detected by the DC current sensor and controls the inverter circuit such that calculated actual power follows a power command value from outside of the interconnected inverter system.

Interconnected inverter system and method of manufacturing interconnected inverter system

When an electrical primary frequency of power fluctuation of a motor is smaller than a determination threshold value fththat is a lower limit frequency of a frequency band where resonance occurs in a circuit including a reactor and a capacitor of a boosting converter or greater than a determination threshold value that is an upper limit frequency of the frequency band where resonance occurs, a value Gis set as a gain G and when the electrical primary frequency is equal to or greater than the determination threshold value fthand equal to or smaller than the determination threshold value, a value Gat which the upper limit frequency of the resonant frequency band has a low frequency than the determination threshold value fthis set as the gain G, and a current control in the boosting converter is executed using the gain G set in this way. The resonance of the circuit including the reactor and the capacitor of the boosting converter can be prevented.

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Toyota, Japan

Kojiro Asakawa