Question

Hydraulic system are preferred over electical system why

Answer 1

It is bcoz of the following reasons :

1)generates power but may not be sufficient

2)drives always require gearing

3)motors have complex control mechanisms(speed control, auxiliary starter systems)

4)short circuiting hazards

5)not portable for high power applications

Answer 2

• Hydraulic actuators are rugged and suited for high-force applications.
• Hydraulic motors have high horsepower-to-weight ratio by 1 to 2 hp/lb greater than a pneumatic motor.
• A hydraulic actuator can hold force and torque constant without the pump supplying more fluid or pressure due to the incompressibility of fluids.


•The initial unit cost of an electrical actuator is higher than that of pneumatic and hydraulic actuators.
•Electrical actuators are not suited for all environments.
• A continuously running motor will overheat, increasing wear and tear on the reduction gear. The motor can also be large and create installation problems