Hollow cylindrical capacitor and inverter device

摘要

The hollow tubular capacitor includes one side electrode connecting portion having an inner peripheral tubular portion and one side surface portion, the other side electrode connecting portion having an outer peripheral tubular portion and the other side surface portion and an electrostatic capacitance portion having one side electrode plate, the other side electrode plate and a dielectric body, wherein the electrostatic capacitance portion is accommodated in an annular space formed at the inner peripheral tubular portion, the one side surface portion, the outer peripheral tubular portion and the other side surface portion in a high density to reduce inside inductance component. The inverter device is formed such that the hollow tubular capacitor and an annular inverter circuit portion having three-phase upper and lower arms are integrally arranged coaxially on the central axis line.

主权项

1. A hollow tubular capacitor connected in parallel with an inverter circuit portion, including:
a one side electrode connecting portion having an inner peripheral tubular portion and a one side surface portion extending from a one end portion of the inner peripheral tubular portion toward an outer peripheral side; an other side electrode connecting portion having an outer peripheral tubular portion arranged coaxially with the inner peripheral tubular portion on a central axis line and an other side surface portion extending from an other end portion of the outer peripheral tubular portion toward an inner peripheral side; and an electrostatic capacitance portion having a one side electrode plate connected to the one side electrode connecting portion, an other side electrode plate arranged oppositely to the one side electrode plate and connected to the other side electrode connecting portion and a dielectric body disposed between the one side electrode plate and the other side electrode plate, wherein the electrostatic capacitance portion is accommodated in a high density in an annular space formed by the inner peripheral tubular portion, the one side surface portion, the outer peripheral tubular portion and the other side surface portion; wherein the hollow tubular capacitor includes a plurality of hollow tubular capacitors arranged in front and rear direction relative to the central axis line direction neighboring one another and the one end portion of the one side surface portion side of a rear side of the inner peripheral tubular portion of the mutually neighboring hollow tubular capacitors is connected to the one end portion of the other side surface portion side of a front side of the inner peripheral tubular portion of the mutually neighboring hollow tubular capacitors, while the one end portion of the one side surface portion side of a rear side of the outer peripheral tubular portion of the mutually neighboring hollow tubular capacitors is connected to the one end portion of the other side surface portion side of the front side of the outer peripheral tubular portion of the mutually neighboring hollow tubular capacitors.