Hydrostatic drives are presently used in many demanding applications. At least three types of output performance are commonly available.
Variable Power, Variable torque transmissions: are based on a variable displacement pump supplying a variable displacement motor. These transmissions provide a combination of constant torque and constant power. These units are the most adjustable, most flexible and most expensive.
Constant Power, Constant variable torque transmissions: are based on a variable displacement pump supplying fluid to a fixed displacement motor under constant load. Speed is controlled by varying pump delivery. This is considered the best general-purpose drive, with wide speed range and simple controls.
Constant Power Variable Torque: transmission are based on a variable displacement pump with a power limited , driving a fixed displacement motor. Th main strength of this transmission is the efficiency.
- Step-less adjustment of speed, torque and power,
- Smooth and controllable acceleration,
- Ability to be stalled without damage
- Easy controllability.