Abstract: This disclosure discloses a power conversion system including a first power converter, a second power converter, and a power storage device. The second power converter includes a control signal generation part, a detection signal processing part, and a state diagnosis part. The control signal generation part is configured to perform at least one of superposition of a predetermined AC voltage on a DC voltage in a second DC power and superposition of a predetermined AC current on a DC current in the second DC power. The detection signal processing part is configured to detect at least one of a detection value of the DC voltage superposed with the AC voltage and a detection value of the DC current superposed with the AC current. The state diagnosis part is configured to diagnose a state of the power storage device based on the detection value.

Abstract: This electronic device includes a filter circuit including a coil, a resistor, and a condenser, and a heat radiating member radiating heat generated from the coil and the resistor, arranged in proximity to the coil and the resistor of the filter circuit.

Abstract: A wiring board includes a conductor plate including a wiring portion and an electrode portion connected to a power conversion semiconductor element, a liquid-cooling pipe mounted near the conductor plate and causing a cooling liquid to be supplied therethrough, and an insulating resin material arranged at least between the conductor plate and the liquid-cooling pipe.

Abstract: This electronic device includes a filter circuit including a coil, a resistor, and a condenser, and a heat radiating member radiating heat generated from the coil and the resistor, arranged in proximity to the coil and the resistor of the filter circuit.

Abstract: A wiring board includes a conductor plate including a wiring portion and an electrode portion connected to a power conversion semiconductor element, a liquid-cooling pipe mounted near the conductor plate and causing a cooling liquid to be supplied therethrough, and an insulating resin material arranged at least between the conductor plate and the liquid-cooling pipe.

Abstract: This power converter includes a power-conversion semiconductor element, an electrode conductor having a substantially flat upper end surface, and a sealant. The sealant allows the substantially flat upper end surface of the electrode conductor to be exposed at an upper surface of the sealant, and provides electrical connection with an external device at the upper end surface of the exposed electrode conductor.

Abstract: It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an alternating-current motor in the free running state. According to the present invention, when a current that flows in an alternating-current motor (2) at a restart time 7 the alternating-current motor (2) continuously flows at a designated current level or higher for a designated period of time, it is determined that the rotational direction or the velocity of the alternating-current motor (2) is incorrectly estimated, and a direct current or a direct-current voltage is again applied to again estimate the rotational direction and the velocity.

Abstract: It is the objective of the present invention to provide a sensorless vector control method and a control apparatus, for an alternating-current motor, that can smoothly restart an alternating-current motor in the free running state. According to the present invention, when a current that flows in an alternating-current motor (2) at a restart time 7 the alternating-current motor (2) continuously flows at a designated current level or higher for a designated period of time, it is determined that the rotational direction or the velocity of the alternating-current motor (2) is incorrectly estimated, and a direct current or a direct-current voltage is again applied to again estimate the rotational direction and the velocity.