# How to calculate the power of a tree?

**Sommaire de notre article**

- How to calculate the power of a tree?
- How to calculate the mechanical power of a motor?
- How to calculate the power absorbed by a motor?
- How to calculate the useful power in Watt?
- How to calculate the useful power with the efficiency?
- How to calculate the size of a tree?
- How to calculate the mechanical power of an electric motor?
- How to calculate the value of the mechanical power?
- How to build a tree with the smallest possible diameter?
- How to calculate the strength of a tree?
- How to size a tree?
- What are the dimensioning factors of a tree?

### How to calculate the power of a tree?

The **Powerful** nominal or **Powerful** useful is the one found on the motor nameplate. It corresponds to the **Powerful** coming out of the**tree** and which is delivered to the driven machine. We have it **calculated** by multiplying the **Powerful** absorbed by performance.

### How to calculate the mechanical power of a motor?

If you know the plan **motor** as well as **Powerful** in horsepower, you can also use the following formula: Torque **motor** (Nm) = (**Powerful** (hp) x 7000) / RPM (rpm). The formula for **calculate power** from **motor** is therefore : **Powerful** (hp) = Torque **motor** (Nm) x Speed (rpm) / 7000.

### How to calculate the power absorbed by a motor?

We use the formula I=P/U.

### How to calculate the useful power in Watt?

**Power calculation** in **watt** the **power calculation** electricity is now very simple: you just need to multiply the intensity by the voltage: Formula of **power calculation** in **watt** : **W** = A x V.

### How to calculate the useful power with the efficiency?

For **calculate** the **yield** of a motor, it is necessary to divide the **power by** the **Powerful** absorbed. **In** this case, the **useful power** corresponds to the **Powerful** electric coming out of the motor. For its part, the **Powerful** absorbed represents the **Powerful** electricity that enters **in** engine. Let R = (Pu/Pa).

### How to calculate the size of a tree?

**measure a tree** (or other vertical element) **Measure** the length of his arm (B) between the eye and the fist. Use a stick whose length is equal to (B). Approach or retreat from**tree** so as to make the top of the**tree** with the top of the stick and the bottom of the**tree** with the bottom of the stick.

### How to calculate the mechanical power of an electric motor?

The **Powerful** of one **motor** refers to energy **mechanical** which he deploys. It is measured by multiplying its rotational speed (in rad/s) by its torque (in Newton meters).

### How to calculate the value of the mechanical power?

The **mechanical power** (P): P = because L/t expresses the speed (in m/s).

### How to build a tree with the smallest possible diameter?

Goal – most economical and safest possible construction → smallest possible shaft diameter. The dimensioning factor of a tree is one of the following 3 elements: – Resistance (in fatigue or ultimate) – Rigidity (to reduce the deflection) – Stability (increase the critical speed – dealt with in part II)

### How to calculate the strength of a tree?

We often choose R=50 MPa as a starting point. Mf=√MfV 2+Mf H 2 Mt= P ω Mt=F⋅D/2F=T−t F=Ft Mi=√Mf2+Mt2Mi=√Mf2+3/4Mt π Mi R 36 Mechanical design Shaft sizing On then obtains a SER, Solid of Equal Resistance, of variable diameter along the shaft.

### How to size a tree?

Shaft sizing We then obtain an RES, Solid of Equal Resistance, of variable diameter along the shaft. This SER is the core on which will be grafted the connecting elements to the wheels, pulleys, cylindrical or conical bearing surfaces imposed by the bearings, etc. You have to add a cover…

### What are the dimensioning factors of a tree?

The dimensioning factor of a tree is one of the following 3 elements: – Resistance (in fatigue or ultimate) – Rigidity (to reduce the deflection) – Stability (increase the critical speed – dealt with in part II)