Sumitomo Electric Industries

Osaka, Japan

Sumitomo Electric Industries

Osaka, Japan
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Patent
Sumitomo Electric Industries | Date: 2017-05-17

This power conversion device includes: conversion devices for supplying AC powers to respective phases with respect to the neutral point of a three-phase AC system via reactors; and a control unit for controlling the conversion devices. Each conversion device includes: a step-up circuit for stepping up the DC input voltage value of DC power; and a single-phase inverter circuit. For each conversion device, when the absolute value of a voltage target value obtained, as an AC waveform to be outputted, by superimposing a third-order harmonic on a fundamental wave exceeds the inputted DC voltage, the control unit causes the step-up circuit to perform step-up operation to generate the absolute value of the voltage target value and causes the single-phase inverter circuit to only perform necessary polarity inversion, and when the absolute value of the voltage target value is smaller than the inputted DC voltage, the control unit stops the step-up operation of the step-up circuit and causes the single-phase inverter circuit to operate to generate the voltage target value.


Patent
Sumitomo Electric Industries | Date: 2017-05-17

A spot friction welding tool (1) is for performing spot friction welding of a first member and a second member by superposing the first member and the second member and pressing the spot friction welding tool (1) against the first member and the second member from the first member side. Each of the first member and the second member is a steel plate having a tensile strength of not lower than 270 MPa and not higher than 370 MPa. The spot friction welding tool (1) is rotatable around a rotation axis (4). The spot friction welding tool (1) includes a column (2) having a shoulder (5) at a tip end thereof, and a cylindrical or truncated conical probe (3) protruding from the shoulder (5) in a direction of extension of the rotation axis (4). When t (mm) represents a thickness of the second member and a second member insertion volume V (mm^(3)) represents a volume of the probe (3) inserted into the second member at the time of pressing the spot friction welding tool (1) against the first member and the second member, a relationship between V and t satisfies a following equation (1):


Patent
Sumitomo Electric Industries | Date: 2017-05-17

A spot friction welding tool (1) is for performing spot friction welding of a first member and a second member by superposing the first member and the second member and pressing the spot friction welding tool (1) against the first member and the second member from the first member side. Each of the first member and the second member is a steel plate having a tensile strength of not lower than 590 MPa. The spot friction welding tool (1) is rotatable around a rotation axis (4). The spot friction welding tool (1) includes a column (2) having a shoulder (5) at a tip end thereof, and a cylindrical or truncated conical probe (3) protruding from the shoulder (5) in a direction of extension of the rotation axis (4). When t (mm) represents a thickness of the second member and a second member insertion volume V (mm^(3)) represents a volume of the probe (3) inserted into the second member at the time of pressing the spot friction welding tool (1) against the first member and the second member, a relationship between V and t satisfies a following equation (1):


Patent
AutoNetworks Technologies Ltd., Sumitomo Wiring Systems Ltd., Sumitomo Electric Industries and Toyota Jidosha Kabushiki Kaisha | Date: 2017-09-20

Provided is a communication system in which a noise converted from a common mode into a differential mode and then inputted to a PLC communication device is reduced so that malfunctioning of the PLC communication device is avoidable. A communication system includes a control line 1d transmitting a control signal for controlling charging of a battery 10 of a vehicle 1; a reference potential line 1c connected to a reference potential of the vehicle 1; a first PLC communication device 14 connected individually to the control line 1d and the reference potential line 1c and superposing onto the control signal a differential signal having a higher frequency than the control signal so as to perform communication with an external power supply apparatus 2; an inductive element 18a which is provided in the reference potential line 1c and the inductive element 18a having impedance for a noise having a higher frequency than the control signal is higher than the impedance for the control signal; and a second inductive element 18b provided in a wire 14b connecting the first PLC communication device 14 to a lead battery 10a.


Patent
Sumitomo Electric Industries and Toyohashi University of Technology | Date: 2017-09-13

A transformer includes, as a front stage circuit, a switch series unit, capacitors, and a ground electrical path. The switch series unit includes odd-numbered switches and even-numbered switches configured to be alternately turned ON, and is, as a whole, connected in parallel to a power supply. Assuming that mutual connection points of the respective switches and points at both ends of the switch series unit are regarded as m nodes in total, and one of the points at the both ends is regarded as a ground node, the capacitors are provided on at least one electrical path of a first electrical path that combines odd nodes and leads the odd nodes to a first output port, and a second electrical path that combines even nodes and leads the even nodes to a second output port, and the capacitors are present so as to correspond to (m - 1) nodes excluding the ground node. The ground electrical path connects the ground node directly to the first output port without an interposed capacitor. The transformer further includes, as a rear stage circuit, an element series unit and inductors. The element series unit is composed of a pair of semiconductor elements that are connected in series to each other and perform conducting operations of mutually opposite polarities. One of both ends of the element series unit is connected to the first output port and to a grounded end of the load while the other end of the element series unit is connected to the second output port. The inductors are provided on a third electrical path that leads a non-grounded end of the element series unit to the grounded end of the load, and a fourth electrical path that leads a mutual connection point of the pair of semiconductor elements to a non-grounded end of the load, respectively.


There is provided a compact for a magnet which can produce a magnetic member having high coercive force. The compact for a magnet is produced by compression-molding a rare earth-iron-based alloy powder containing a plurality of particles of a rare earth-iron-based alloy containing a rare earth element and iron, wherein the rare earth-iron-based alloy satisfies configurations (a) to (c) below and has 5% by volume or more and 20% by volume or less of voids formed therein. (a) Having a structure containing 10% by mass or more and 30% by mass or less of Sm, 10% by mass or less of Mn, and the balance consisting of Fe and inevitable impurities. (b) A composition, Sm_(2)Mn_(x)Fe_(17-x) (x = 0.1 or more and 2.5 or less). (c) An average crystal grain diameter of 700 nm or less.


Patent
Sumitomo Electric Industries and Toyohashi University of Technology | Date: 2017-09-13

A transformer includes, as a front stage circuit, a switch series unit and capacitors. The switch series unit includes odd-numbered switches and even-numbered switches configured to be alternately turned ON, and is, as a whole, connected in parallel to a power supply. Assuming that mutual connection points of the respective switches and points at both ends of the switch series unit are regarded as m nodes in total, the capacitors are provided on at least one electrical path of a first electrical path that combines odd nodes and leads the odd nodes to a first output port, and a second electrical path that combines even nodes and leads the even nodes to a second output port. The capacitors are present so as to correspond to at least (m - 1) nodes. The transformer includes, as a rear stage circuit, an element series unit and inductors. The element series unit is composed of a pair of semiconductor elements that are connected in series to each other and perform conducting operations of mutually opposite polarities. One of both ends of the element series unit is connected to the first output port while the other end thereof is connected to the second output port. The inductors are provided on at least one electrical path of a third electrical path that combines two nodes that are points at the both ends of the element series unit, and leads the two nodes to one of both ends of the load, and a fourth electrical path that leads one node that is a mutual connection point of the pair of semiconductor elements to the other end of the load. The inductors are present so as to correspond to at least two nodes of the three nodes in total.


Patent
Autonetworks Technologies Ltd., Sumitomo Wiring Systems Ltd., Sumitomo Electric Industries and Toyota Jidosha Kabushiki Kaisha | Date: 2017-09-20

Provided is a communication system in which a noise converted from a common mode into a differential mode and then inputted to a PLC communication device is reduced so that malfunctioning of the PLC communication device is avoidable. A communication system comprising: a control line 1d transmitting a control signal for controlling charging of a battery 10 mounted on a vehicle 1; a reference potential line 1c connected to a reference potential of the vehicle 1 serving as a reference for the control signal; a first PLC communication device 14 connected to the control line 1d and the reference potential line 1c and superposing onto the control signal a differential signal having a higher frequency than the control signal so as to perform communication with an external power supply apparatus 2; and an inductive element 18 which is provided at a point of connection between the reference potential line 1c and the reference potential or provided in the reference potential line 1c and the inductive element having impedance for a noise having a higher frequency than the control signal is higher than the impedance for the control signal.


Patent
Sumitomo Electric Industries | Date: 2017-09-13

Provided are a battery cell that can be produced efficiently. A frame body of each cell frame of a battery cell includes an inner peripheral recessed portion formed by reducing a thickness of a peripheral portion that surrounds an entire perimeter of the penetrating window so that the peripheral portion has a smaller thickness than other portions of the frame body. A bipolar plate of the battery cell includes an outer peripheral engaging portion that engages with the inner peripheral recessed portion, the outer peripheral engaging portion being a portion having a particular width and extending throughout an entire outer periphery of the bipolar plate. The battery cell includes a disrupting structure that disrupts a leak channel that serves as an escape route for the electrolyte, the leak channel causing the inlet slit and the outlet slit to be in communication with each other and being formed between an outer periphery of the inner peripheral recessed portion and an outer periphery of the outer peripheral engaging portion when the cell frames are viewed from front.


Patent
Sumitomo Electric Industries | Date: 2017-09-13

A battery cell having high battery performance is provided. The battery cell for a flow battery includes a cell frame including a frame including a through-window and a manifold serving as an electrolyte flow path, and a bipolar plate blocking the through-window; a positive electrode disposed on one surface side of the bipolar plate; and a negative electrode disposed on another surface side of the bipolar plate. In this battery cell, in the frame, a thickness of a portion in which the manifold is formed is defined as Ft; in the bipolar plate, a thickness of a portion blocking the through-window is defined as Bt; in the positive electrode, a thickness of a portion facing the bipolar plate is defined as Pt; in the negative electrode, a thickness of a portion facing the bipolar plate is defined as Nt; and these thicknesses satisfy Ft 4 mm, Bt Ft - 3.0 mm, Pt 1.5 mm, and Nt 1.5 mm.

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