Abstract: 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.

Abstract: A fuel cell unit includes a lower case and an upper case. A cell stack of multiple fuel cells is accommodated in the lower case. The upper case is coupled to the lower case. Substrates on which electronic components are implemented are mounted to an inner side of the upper case. A wall extending from a top plate of the upper case is provided between a side plate of the upper case and the substrates. When the upper case is turned, the wall prevents falling dust from adhering to the substrates.

Abstract: 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.

Abstract: 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.

Abstract: Provided is a semiconductor wafer placement position determination method making it possible to measure a position deviation at a placement position of a semiconductor wafer when using a susceptor that is N-fold symmetric with respect to the center of the susceptor as a rotation axis. In this method, an opening edge of a counterbore portion of the susceptor is N-fold symmetric with respect to the center of the susceptor as a rotation axis (N?2). This method includes: a measurement step of measuring, while rotating the susceptor on which the semiconductor wafer is placed, a gap distance between a periphery of the semiconductor wafer and the opening edge; a first calculation step of performing, based on variation of the gap distance, period regression analysis; and a second calculation step of determining the position deviation based on an amplitude of a trigonometric function obtained by the first calculation step.

Abstract: A fuel cell unit includes a fuel cell stack, a reactor, and a case housing the fuel cell stack and the reactor. The case is provided with an intermediate plate that partitions a space inside the case into an upper space and a lower space. The fuel cell stack is housed in the lower space, with a predetermined clearance provided between the intermediate plate and the fuel cell stack. The reactor is housed in the upper space above the fuel cell stack, with an upper portion of the reactor fixed to the case. A through-hole that is provided in the intermediate plate at a position below the reactor. The lower portion of the reactor faces the through-hole.

Abstract: A power source device may include a casing housing a fuel cell or a battery; a small room provided in the casing, the small room partitioned from a main space in which the fuel cell or the battery is housed; a cooler arranged at a floor of the small room; a first electric component being in contact with a lower surface of the floor so as to be opposed to the cooler; and a second electric component being in contact with an upper surface of the floor so as to be opposed to the cooler, an amount of heat generated by the second electric component being smaller than an amount of heat generated by the first electric component, wherein the casing may include a through hole communicating the small room with the main space.

Abstract: A reactor unit includes reactors; and a cooler. The reactors are disposed in at least one line on a reactor cooling surface that is one of outer surfaces of the cooler. The cooler has a cooling medium flow passage that is in contact with an inner surface on a reverse side of the reactor cooling surface. The cooling medium flows linearly from an inlet portion to an outlet portion of the cooling medium flow passage. A direction in which the cooling medium flows inside the cooling medium flow passage is same as a direction in which the reactors are disposed in the at least one line. Cooling fins are provided on the inner surface on the reverse side of the reactor cooling surface. A longitudinal direction of each cooling fin is same as the direction in which the cooling medium flows inside the cooling medium flow passage.

Abstract: Provided is a semiconductor wafer placement position determination method making it possible to measure a position deviation at a placement position of a semiconductor wafer when using a susceptor that is N-fold symmetric with respect to the center of the susceptor as a rotation axis. In this method, an opening edge of a counterbore portion of the susceptor is N-fold symmetric with respect to the center of the susceptor as a rotation axis (N?2). This method includes: a measurement step of measuring, while rotating the susceptor on which the semiconductor wafer is placed, a gap distance between a periphery of the semiconductor wafer and the opening edge; a first calculation step of performing, based on variation of the gap distance, period regression analysis; and a second calculation step of determining the position deviation based on an amplitude of a trigonometric function obtained by the first calculation step.

Abstract: A fuel cell unit includes a lower case and an upper case. A cell stack of multiple fuel cells is accommodated in the lower case. The upper case is coupled to the lower case. Substrates on which electronic components are implemented are mounted to an inner side of the upper case. A wall extending from a top plate of the upper case is provided between a side plate of the upper case and the substrates. When the upper case is turned, the wall prevents falling dust from adhering to the substrates.

Abstract: A power source device may include a casing housing a fuel cell or a battery; a small room provided in the casing, the small room partitioned from a main space in which the fuel cell or the battery is housed; a cooler arranged at a floor of the small room; a first electric component being in contact with a lower surface of the floor so as to be opposed to the cooler; and a second electric component being in contact with an upper surface of the floor so as to be opposed to the cooler, an amount of heat generated by the second electric component being smaller than an amount of heat generated by the first electric component, wherein the casing may include a through hole communicating the small room with the main space.

Abstract: A fuel cell unit includes a fuel cell stack, a reactor, and a case housing the fuel cell stack and the reactor. The case is provided with an intermediate plate that partitions a space inside the case into an upper space and a lower space. The fuel cell stack is housed in the lower space, with a predetermined clearance provided between the intermediate plate and the fuel cell stack. The reactor is housed in the upper space above the fuel cell stack, with an upper portion of the reactor fixed to the case. A through-hole that is provided in the intermediate plate at a position below the reactor. The lower portion of the reactor faces the through-hole.

Abstract: A protection bar is arranged between a fuel cell casing and a DC-DC converter in the left-right direction of a fuel cell vehicle. Two fastening surfaces, each being a part of the fuel cell casing, and an FDC flange, which is a part of the DC-DC converter, are fastened and fixed to each other, with one being vertically superimposed on the other, in a space above or below the protection bar.

Abstract: There is provided a boost converter. The boost converter comprises a reactor electrically connected with a power source; a semiconductor module configured to include a plate-like member and a terminal protruded from the plate-like member; a holder portion provided as a frame-like member, arranged to be adjacent to the reactor along either a longitudinal direction of a vehicle or a vehicle width direction, and configured to hold a plurality of the semiconductor modules inside of a frame of the holder portion such that the plurality of semiconductor modules are stacked and pressurized; and a first bus bar arranged to electrically connect the reactor with the terminal and provided with a current sensor that is configured to detect an electric current flowing from the reactor to the semiconductor modules.

Abstract: There is provided a boost converter. The boost converter comprises a reactor electrically connected with a power source; a semiconductor module configured to include a plate-like member and a terminal protruded from the plate-like member; a holder portion provided as a frame-like member, arranged to be adjacent to the reactor along either a longitudinal direction of a vehicle or a vehicle width direction, and configured to hold a plurality of the semiconductor modules inside of a frame of the holder portion such that the plurality of semiconductor modules are stacked and pressurized; and a first bus bar arranged to electrically connect the reactor with the terminal and provided with a current sensor that is configured to detect an electric current flowing from the reactor to the semiconductor modules.

Abstract: A reactor unit includes reactors; and a cooler. The reactors are disposed in at least one line on a reactor cooling surface that is one of outer surfaces of the cooler. The cooler has a cooling medium flow passage that is in contact with an inner surface on a reverse side of the reactor cooling surface. The cooling medium flows linearly from an inlet portion to an outlet portion of the cooling medium flow passage. A direction in which the cooling medium flows inside the cooling medium flow passage is same as a direction in which the reactors are disposed in the at least one line. Cooling fins are provided on the inner surface on the reverse side of the reactor cooling surface. A longitudinal direction of each cooling fin is same as the direction in which the cooling medium flows inside the cooling medium flow passage.

Abstract: A device unit is provided with a first heating element, a second heating element configured to generate a heat in an amount smaller than that generated by the first heating element, and a cooler located between the first heating element and the second heating element. The cooler has a coolant flow passage through which a coolant flows, and cooling fins disposed on a first heating element side in the coolant flow passage in a manner as to be substantially in parallel with a flow direction of the coolant, and a fluid resistance of the coolant in the coolant flow passage is smaller on a second heating element side than on the first heating element side.

Abstract: This fuel cell vehicle comprises a DC-DC converter constituted of a power input portion, reactors, and switching circuit sections. Connecting portions of the power input portion to the reactors and connecting portions of the reactors to the switching circuit sections in the DC-DC converter are all arranged side by side along a forward-backward direction of the vehicle, and arranged in this state on the side of one side surface of the DC-DC converter on one of the right side and left side of the vehicle.

Abstract: A protection bar is arranged between a fuel cell casing and a DC-DC converter in the left-right direction of a fuel cell vehicle. Two fastening surfaces, each being a part of the fuel cell casing, and an FDC flange, which is a part of the DC-DC converter, are fastened and fixed to each other, with one being vertically superimposed on the other, in a space above or below the protection bar.

Abstract: A reactor unit comprises a reactor and a base to which the reactor is attached. The base has base-side bonding surfaces to be bonded to a bonding surface of the reactor. A base connector, which does not include the base-side bonding surfaces, is configured to have a thickness smaller than those of first and second bases, which include the base-side bonding surfaces.