Abstract
Recently a new Static Leonard Motor with SCR (Silicon Controlled Rectifier) is used for D. C. motor driven directly from A. C. source. The purpose of the present paper is to study a few types of marine use SCR winch. Through the observation of the experience of this new system offers the following advantages in regard to characteristics. (1) As D. C. motor requires no series resistances, its efficiency becomes larger by so much. (2) The controlling characteristics, when hoist and lower notch are taken, are changable easily. (3) The high speed at low torque and low speed at heavy are taken with high efficiency.
