| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent "electrolytic corrosion" by solving the problem wherein the so-called "electrolytic corrosion" occurs, if several frames different in constituent materials are connected in low resistance with each other by any cause, in the case of contriving the reduction of noise by connecting by a grounding wire, the several frames of a motor and a controller for driving and controlling it with each other. <P>SOLUTION: This semiconductor device 3 is constituted by providing a shield plate 6 as a conductor and an insulation sheet 7 between itself and a controller frame 4, aiming at insulation between itself 3 and the controller frame 4 by the insulation sheet 7, and by connecting the shield plate 6 with a grounding wire 5, and installing both frames of the electric motor and the controller so that they are the same potential. Hereby, this system can prevent the occurrence of "electrolytic corrosion", as conventional. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
