原動機の効率を考慮に入れた回転物体の速度制御

抄録

Many papers on speed control systems have been published so far. To the author's knowledge, in these papers the efficiency of the prime mover is not taken into consideration. However, from economical view point, the efficiency of the prime mover could not be ignored when high power is consumed in the load.
This paper shows the results of researches on a special speed control system designed to control the load speed and to maximize the efficiency of the prime mover.
Concerning the efficiency of the prime mover, attention should be paid to the fact that for the required output power, it will reach its maximum at a certain speed. This fact could be adopted to maximize the efficiency of the prime mover, by controlling the reduction ratio of a reduction mechanism with stepless variable reduction ratio installed between the prime mover and the load.
Actually, this paper is a continued report of the paper published under the same title as this one in the Journal of this Society, Vol.8, No.3, 1969.
In the previous report, a hydraulic transmission was used as a reduction mechanism. But due to the existence of leakage losses the efficiency of the whole system decreased when high torque was transmitted to the load.
In this research, a hydro-mechanical transmission is adopted as a reduction mechanism instead of the hydraulic transmission.
It consists of mechanical components considered to have no losses and a hydraulic transmission used to allow changing the reduction ratio continuously in order to maximize the efficiency of the prime mover.
By adopting this reduction mechanism, it was possible to obtain high efficiency over the whole range of the operation of the system.