Limiting Value Of Core Length Calculator

Formula Used:

\[ L_{limit} = \frac{7.5}{B_{av} \times V_a \times T_c \times n_c} \]

Specific Magnetic Loading (Bav):

Tesla

Peripheral Speed of Armature (Va):

m/s

Turns per Coil (Tc):

Number of Coils between Adjacent Segments (nc):

Limiting Value of Core Length (Llimit):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is Limiting Value of Core Length?

The Limiting Value of Core Length is defined as the maximum core length where the emf induced in a conductor should exceed 7.5/TcNc in order that the maximum value at load between adjacent segments is limited to 30 V.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ L_{limit} = \frac{7.5}{B_{av} \times V_a \times T_c \times n_c} \]

Where:

\( B_{av} \) — Specific Magnetic Loading (Tesla)
\( V_a \) — Peripheral Speed of Armature (m/s)
\( T_c \) — Turns per Coil
\( n_c \) — Number of Coils between Adjacent Segments

Explanation: This formula calculates the limiting core length based on magnetic loading, armature speed, coil turns, and number of coils between segments.

3. Importance of Core Length Calculation

Details: Accurate calculation of core length is crucial for electrical machine design, ensuring proper voltage limitations between adjacent segments and optimal machine performance.

4. Using the Calculator

Tips: Enter specific magnetic loading in Tesla, peripheral speed in m/s, turns per coil, and number of coils between adjacent segments. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is specific magnetic loading?
A: Specific magnetic loading is defined as the total flux per unit area over the surface of the armature periphery.

Q2: How is peripheral speed calculated?
A: Peripheral speed is calculated as the distance traveled by the armature per unit time, typically measured in meters per second.

Q3: What are typical values for turns per coil?
A: Turns per coil vary depending on the machine design and application, typically ranging from tens to hundreds of turns.

Q4: How does number of coils affect the calculation?
A: Number of coils between adjacent segments is 1 for simplex lap winding and P/2 for a simplex wave winding, where P is the number of poles.

Q5: Why is the 7.5 constant used in the formula?
A: The 7.5 constant ensures that the maximum voltage between adjacent segments is limited to 30V for safe operation.