Maximum Efficiency of Screw Jack Calculator

Calculate Maximum Efficiency of Screw Jack



Formula

The formula to calculate the Maximum Efficiency of Screw Jack is:

\[ \eta = \frac{1 - \sin(\Phi)}{1 + \sin(\Phi)} \]

Definition

The Efficiency of an electric motor is defined as the ratio of usable shaft power to electric input power.

Example Calculation

Let's assume the following values:

Using the formula:

\[ \eta = \frac{1 - \sin(0.21816615649925)}{1 + \sin(0.21816615649925)} = 0.644142444132729 \]

Conversion Chart

Limiting Angle of Friction (Φ) Maximum Efficiency (η)
0.2 rad 0.668516870014
0.21 rad 0.654999061413
0.22 rad 0.641726618781
0.23 rad 0.628694305611
0.24 rad 0.615897031562
0.25 rad 0.603329847690
0.26 rad 0.590987941854
0.27 rad 0.578866634295
0.28 rad 0.566961373384
0.29 rad 0.555267731534