Abstract: Between positive and negative electrode ends of battery 50, fuse 51, main contactor 52 and electrolytic capacitor C21 are connected in series. Between positive and negative electrode ends of electrolytic capacitor C21, inverter 54 in which upper phase side EFT (54U, 54V, 54W) and lower phase side FET (54X, 54Y, 54Z) are bridge-connected is connected. Resistor R1 for precharging electrolytic capacitor C21 is connected to main contactor 52 in parallel. The resistance value of resistor R1 is set so that in a precharging period until a key switch is turned on after battery 50 is connected, when the upper phase side FET is OFF-controlled and the lower phase side EFT is ON-controlled, the charge voltage value of electrolytic capacitor C21 is set to be able to limit a gate-source voltage of the upper phase side FET to a voltage at which the upper phase side FET is not turned on.

Abstract: Between positive and negative electrode ends of battery 50, fuse 51, main contactor 52 and electrolytic capacitor C21 are connected in series. Between positive and negative electrode ends of electrolytic capacitor C21, inverter 54 in which upper phase side EFT (54U, 54V, 54W) and lower phase side FET (54X, 54Y, 54Z) are bridge-connected is connected. Resistor R1 for precharging electrolytic capacitor C21 is connected to main contactor 52 in parallel. The resistance value of resistor R1 is set so that in a precharging period until a key switch is turned on after battery 50 is connected, when the upper phase side FET is OFF-controlled and the lower phase side EFT is ON-controlled, the charge voltage value of electrolytic capacitor C21 is set to be able to limit a gate-source voltage of the upper phase side FET to a voltage at which the upper phase side FET is not turned on.

Abstract: A wire conductor has a plurality of elemental wires made of aluminum or an aluminum alloy, which are stranded with each other and arranged, in cross-section intersecting an axial direction of the wire conductor, in which one or a plurality of virtual elemental wires are removed from an outer peripheral portion of a virtual cross-section represented by a maximum number of virtual elemental wires accommodated in a circumscribing figure approximated by a regular hexagon, the virtual elemental wires having a same diameter as the elemental wires. The wire conductor includes a plurality of slave strands, each being a strand of the plurality of elemental wires, a maximum diameter cross-sectional area ratio is 0.63 or higher that is calculated by dividing a cross-sectional area of the wire conductor by an area of a circle having a diameter equal to a maximum value of an outer diameter of the wire conductor.

Abstract: A wire conductor has a plurality of elemental wires made of aluminum or an aluminum alloy, which are stranded with each other and arranged, in cross-section intersecting an axial direction of the wire conductor, in which one or a plurality of virtual elemental wires are removed from an outer peripheral portion of a virtual cross-section represented by a maximum number of virtual elemental wires accommodated in a circumscribing figure approximated by a regular hexagon, the virtual elemental wires having a same diameter as the elemental wires. The wire conductor includes a plurality of slave strands, each being a strand of the plurality of elemental wires, a maximum diameter cross-sectional area ratio is 0.63 or higher that is calculated by dividing a cross-sectional area of the wire conductor by an area of a circle having a diameter equal to a maximum value of an outer diameter of the wire conductor.

Abstract: A wire conductor has a plurality of elemental wires made of aluminum or an aluminum alloy, which are stranded with each other and arranged, in cross-section intersecting an axial direction of the wire conductor, in which one or a plurality of virtual elemental wires are removed from an outer peripheral portion of a virtual cross-section represented by a maximum number of virtual elemental wires accommodated in a circumscribing figure approximated by a regular hexagon, the virtual elemental wires having a same diameter as the elemental wires. The wire conductor includes a plurality of slave strands, each being a strand of the plurality of elemental wires, a maximum diameter cross-sectional area ratio is 0.63 or higher that is calculated by dividing a cross-sectional area of the wire conductor by an area of a circle having a diameter equal to a maximum value of an outer diameter of the wire conductor.

Abstract: Methods for cross-linking a PVC coated wire without using electron beam irradiating equipment are disclosed. The methods include heating an insulating coating after formation of the same to manufacture a cross-linked PVC coated wire in which the outside of a conductor has been coated by the insulating coating, the insulating coating formed from a compound in which an oxidation preventing agent has been added to polyvinyl chloride.