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Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator

Easily calculate and compute brushless dc (bldc) motor torque constant (kt), back-emf (ke) & kv rating calculator with accurate equations, live formulas, and expert guidance.

Typical drone/e-bike motor spec (e.g. 850 Kv, 1200 Kv).

Calculated Result
0.01 N·m/A

Torque Constant (K_t)

Torque Constant (K_t)

0.01 N·m/A

Torque Constant Kt Nm Per Amp

0.0112

Back Emf Constant Ke V Per Rad Sec

0.0112

Continuous Rated Torque Nm

0.39

Winding Copper Loss Watts

73.5

0.01 — N·m/A

Calculation Breakdown

  1. Applied FormulaConverts brushless DC motor RPM-per-Volt speed constants ($K_v$) into SI Torque Constants ($K_t$ in N·m/A) and Back-EMF coefficients ($K_e$) for robotic actuators and drone drives.K_t = \frac{60}{2\pi K_v} \approx \frac{9.5493}{K_v}

BLDC Motor Constants Kt & Kv Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Torque Constant (K_t)

What Is the Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator?

This tool computes brushless dc (bldc) motor torque constant (kt), back-emf (ke) & kv rating calculator with high precision arithmetic.

How Does the Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator Work?

Converts brushless DC motor RPM-per-Volt speed constants (KvK_v) into SI Torque Constants (KtK_t in N·m/A) and Back-EMF coefficients (KeK_e) for robotic actuators and drone drives.

Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Kt=602πKv≈9.5493KvK_t = \frac{60}{2\pi K_v} \approx \frac{9.5493}{K_v}

Converts brushless DC motor RPM-per-Volt speed constants (KvK_v) into SI Torque Constants (KtK_t in N·m/A) and Back-EMF coefficients (KeK_e) for robotic actuators and drone drives.

How to Use the Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Brushless DC (BLDC) Motor Torque Constant (Kt), Back-EMF (Ke) & Kv Rating Calculator Example

Input Values:

motorVelocityConstantKvRpmPerVolt:850
phaseToPhaseResistanceOhms:0.08
continuousPhaseCurrentAmps:35
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required N·m/A.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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