The advantages that hydraulic motors have, such as high power density, accurate control and smooth operation make them preferable to electric motors in crane applications. Here is why hydraulic motors are preferred for crane purposes:
- Power density: The power densities of hydraulic systems are higher than those of electrical systems i.e., more power can be transmitted per weight or volume. This is necessary for cranes which need to lift heavy loads.
- Precise control: Hydraulic systems also allow fine control over output power and speed, leading to precise positioning and movement controls. It is important that heavy weights are safely handled during the process of operating cranes.
- Smooth operation: Hydraulic systems work smoothly with low noise levels and vibration when it comes to handling loads quietly and gently like in crane applications.
- Overload protection: Hydraulic systems provide overload protection essential in crane activities involving heavy loads due to their ability to automatically limit flow rate and pressure.
On the other hand, power density and control in hydraulic motors is not comparable to that of electric motors. Electric motors can generate high torque but may not have the same power density as hydraulic systems. In addition, electric drives do not provide smoothness and overload protection which can be experienced in a hydraulic system.
In conclusion, cranes are better with hydraulic motors compared to electrical ones due to their higher power density, accurate control, smoothness or operation and overload protection. Consequently, these are best for handling heavy loads under delicate positions as well as precise movements without compromising safety.
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