scholarly journals Performance Investigation of Hydrostatic Transmission System as a Function of Pump Speed and Load Torque

2012 ◽  
Vol 93 (2) ◽  
pp. 187-193
Author(s):  
S. K. Mandal ◽  
A. K. Singh ◽  
Y. Verma ◽  
K. Dasgupta
Keyword(s):  
Transmission System ◽  
Load Torque ◽  
Pump Speed ◽  
Hydrostatic Transmission

Self-Tuning Adaptive Speed Control of a Pump/Inverter-Controlled Hydraulic Motor System

1995 ◽  
Vol 209 (2) ◽  
pp. 101-114 ◽  
Author(s):  
H-W Wu ◽  
C-B Lee
Keyword(s):  
Induction Motor ◽  
Motor System ◽  
External Disturbance ◽  
Adaptive Controller ◽  
Transmission System ◽  
Hydraulic Motor ◽  
Controlled System ◽  
Pump Speed ◽  
Hydrostatic Transmission ◽  
Self Tuning

In a hydrostatic transmission system the speed of the fixed displacement hydraulic motor can be controlled by varying either the pump displacement or the pump speed. The change of pump speed can be achieved via an inverter which governs the speed of an induction motor. In this paper, both the pump-controlled hydraulic motor system and the inverter-controlled hydraulic motor system are studied. A microcomputer-based self-tuning adaptive controller was designed and applied to both systems. A series of simulations and experiments was performed. The results show that both the pump-controlled system and the inverter-controlled system can be regulated to maintain a desired response under different speed commands, load inertias, oil temperatures and an external disturbance.

Research on Power Diffluence and Conflux Mechanism of Hydro-Mechanical Transmission

2012 ◽  
Vol 479-481 ◽  
pp. 921-924
Author(s):  
Zhao Lin Han ◽  
Feng Liu
Keyword(s):  
Power Flow ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Gear Pair ◽  
Pump Speed ◽  
Characteristics Analysis ◽  
Dual Power

Abstract. Hydro-Mechanical Transmission (HMT) is a dual-power flow transmission system in which power is transferred parallel by mechanical transmission and hydraulic transmission. There are four types of HMT: torque-diffluence and torque-conflux, torque-diffluence and speed-conflux, speed-diffluence and speed-conflux, speed-diffluence and torque-conflux, when gear pair and planetary train are used as power diffluence or conflux mechanism respectively. And the result of kinematics characteristics analysis indicates that only torque-diffluence and speed-conflux type of HMT can be used as the vehicle transmission system because its output speed characteristics and pump speed characteristics can meet the requirements of the vehicle drive.

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