High frequency leakage current return wire-contained motor drive cable, low inductance return wire-contained unshielded cable, and motor drive control system the cables
AssigneesOki Electric Cable Co., Ltd., Fanuc Corporation
InventorsMasanobu Nakamura, Keiji Munezuka
Life of this patent
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Abstract
Provided is a high frequency (HF) leakage current return wire-contained motor drive cable configured in a manner that one or multiple drive dielectric core wires (2) and one or multiple HF leakage current return wires (5) are arranged adjacent to and in close contact in neighborhoods thereof to thereby reduce inductances of the HF leakage current return wires (5). Concurrently, the drive dielectric core wires (2) and the HF leakage current return wires (5) are arranged substantially parallel to the longitudinal direction and are stranded; and a sheath (8) is provided without a shield being provided outside of the strand wires.
Claims51
A high frequency (HF) leakage current return wire-contained motor drive cable, characterized by being configured in a manner that a plurality of drive insulated wires and one or a plurality of HF leakage current return wires are arranged adjacent to and in close contact in neighborhoods thereof to thereby reduce inductances of the HF leakage current return wires;
- the drive insulated wires and the HF leakage current return wires are arranged substantially parallel to a longitudinal direction and are stranded;
- and a sheath is provided without a shield being provided outside of the strand wires.
A HF leakage current return wire-contained motor drive cable, characterized by being configured in a manner that a plurality of drive insulated wires and one or a plurality of HF leakage current return wires are arranged adjacent to and in close contact in neighborhoods thereof to thereby reduce inductances of the HF leakage current return wires;
- an ground wire is added thereto;
- the drive insulated wires, the HF leakage current return wires, and the ground wire are arranged substantially parallel to a longitudinal direction and are stranded;
- and a sheath is provided without a shield being provided outside of the strand wires.
A HF leakage current return wire-contained motor drive cable, characterized by being configured in a manner that a plurality of drive insulated wires and one or a plurality of HF leakage current return wires are arranged adjacent to and in close contact in neighborhoods thereof to thereby reduce inductances of the HF leakage current return wires;
- the drive insulated wires and the HF leakage current return wires are arranged substantially parallel to a longitudinal direction and are stranded;
- a shield is provided outside of the strand wires;
- and a sheath is provided outside of the shield.
A HF leakage current return wire-contained motor drive cable, characterized by being configured in a manner that a plurality of drive insulated wires and one or a plurality of HF leakage current return wires are arranged adjacent to and in close contact in neighborhoods thereof to thereby reduce inductances of the HF leakage current return wires;
- an ground wire is added thereto;
- the drive insulated wires, the HF leakage current return wires, and the ground wire are arranged substantially parallel to a longitudinal direction and are stranded;
- a shield is provided outside of the strand wires;
- and a sheath is provided outside of the shield.
A low inductance return wire-contained unshielded cable, characterized in that, as viewed from a cable cross-sectional direction, three insulated wires respectively are arranged independently at three apexes of a substantially equilateral triangle, and three return wires respectively are arranged in external portions of valley portions of an assembly formed from the three insulated wires at three apexes of a substantially equilateral triangle to be adjacent to and in close contact with the motor drive insulated wires in neighborhoods thereof, thereby to reduce inductances of loop circuits configured from the respective insulated wires and return wires;
- the three insulated wires and the three return wires are arranged substantially parallel to a longitudinal direction and are stranded along the same direction;
- and a sheath is provided without a shield being provided outside of the strand wires.
A low inductance return wire-contained unshielded cable, characterized by comprising three insulated wires and one ground wire, wherein one or a plurality of return wires are arranged adjacent to and in close contact with an outer circumference of any one of the three insulated wires in neighborhood thereof to thereby reduce inductances of loop circuit configured from the insulated wires and the return wires;
- the three drive insulated wires, the one or the plurality of return wires, and the one ground wire are arranged substantially parallel to a longitudinal direction and are stranded;
- and a sheath is provided without a shield being provided outside of the strand wires.
A low inductance return wire-contained unshielded cable, characterized in that, as viewed from a cable cross-sectional direction, three insulated wires respectively are arranged independently at three apexes of a substantially equilateral triangle, and a return wire not provided with an insulative sheath is arranged in a central portion of the three insulated wires, thereby to reduce inductances of loop circuits configured from the insulated wires and return wires.
A HF leakage current return wire-contained drive cable for interconnecting an inverter and a driven control device, characterized by being configured in a manner that a plurality of drive insulated wires and one or a plurality of HF leakage current return wires not each jacketed with an insulative sheath are adjacently arranged substantially parallel to a longitudinal direction and are stranded, and a sheath is provided without a shield being provided outside of the strand wires, wherein the inverter and the driven control device are interconnected by the drive cable to thereby reduce inductances of loop circuits configured from the respective insulated wires and return wires, thereby to from the HF leakage current return wire as a return path of the HF leakage current from the driven control device to the inverter.
A HF leakage current return wire-contained motor drive cable for interconnecting an inverter and a driven control device, characterized by being configured in a manner that, as viewed from a cable cross-sectional direction, three insulated wires respectively are arranged independently at three apexes of a substantially equilateral triangle, three HF leakage current return wires respectively are arranged at three apexes of a substantially equilateral triangle, the three HF leakage current return wires are arranged to be adjacent to and in close contact with the motor drive insulated wires in neighborhoods thereof, and the wires thus arranged are stranded, and a sheath is provided without a shield being provided outside of the strand wires, wherein the inverter and the driven control device are interconnected by the drive cable to thereby reduce inductances of loop circuits configured from the respective insulated wires and return wires, thereby to form the HF leakage current return wires as return paths of the HF leakage current from the driven control device to the inverter.
A motor drive control system characterized in that an inverter and a motor working as a driven control device to be driven by the inverter are interconnected by a HF leakage current return wire-contained drive cable in which the inductance is caused to be low, wherein a HF leakage current caused on the side of the motor due to a HF switching pulse associated with the inverter is efficiently returned by the drive cable to the side of the inverter.
Dependencies are inferred from the claim text.