3 Phase Induction Motor Torque Calculator

Torque Formula:

\[ T = \frac{3 \times V \times I \times PF \times eff \times 60}{2 \times \pi \times RPM} \]

Voltage (V):

Current (I):

Power Factor (PF):

dimensionless

Efficiency (eff):

dimensionless

RPM:

rev/min

Torque (T):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is 3 Phase Induction Motor Torque?

Torque in a 3-phase induction motor represents the rotational force produced by the motor. It is a crucial parameter that determines the motor's ability to perform mechanical work and drive loads.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ T = \frac{3 \times V \times I \times PF \times eff \times 60}{2 \times \pi \times RPM} \]

Where:

\( T \) — Torque (Nm)
\( V \) — Voltage (V)
\( I \) — Current (A)
\( PF \) — Power Factor (dimensionless)
\( eff \) — Efficiency (dimensionless)
\( RPM \) — Rotational Speed (rev/min)

Explanation: This formula calculates the output torque of a 3-phase induction motor based on electrical input parameters and mechanical speed.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for motor selection, sizing mechanical systems, ensuring proper starting capability, and optimizing motor performance for specific applications.

4. Using the Calculator

Tips: Enter voltage in volts, current in amperes, power factor and efficiency as dimensionless values between 0-1, and RPM in revolutions per minute. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical power factor range for induction motors?
A: Power factor typically ranges from 0.7 to 0.9 for induction motors, depending on motor size, load, and design.

Q2: How does torque vary with motor speed?
A: Induction motors produce maximum torque at a specific speed (typically around 80-90% of synchronous speed), with torque decreasing at both lower and higher speeds.

Q3: What affects motor efficiency?
A: Efficiency depends on motor design, load conditions, quality of materials, and operating temperature. Modern motors typically have efficiencies between 85-95%.

Q4: Why is 3-phase power used for industrial motors?
A: 3-phase systems provide smoother power delivery, higher efficiency, better torque characteristics, and require less conductor material compared to single-phase systems.

Q5: How accurate is this torque calculation?
A: This calculation provides a good estimate but actual torque may vary due to factors like temperature, voltage fluctuations, and motor condition. For precise applications, consult motor performance curves.