Brushless Motor Power Calculator
Unit Converter ▲
Unit Converter ▼
From:  To: 
The brushless motor power calculator is designed to help users easily determine the input power required for a brushless motor based on its output power and efficiency. This tool is especially useful for engineers, hobbyists, and professionals working with electric motors.
Historical Background
Brushless motors have revolutionized the field of electric motors by offering high efficiency, reliability, and reduced noise compared to brushed motors. They operate electronically, without physical brushes, leading to less wear and longer lifespan.
Calculation Formula
The formula to calculate the input power for a brushless motor is given by:
\[ Pi = \frac{Po}{E/100} \]
where:
 \(Pi\) is the Brushless Motor Input Power in watts,
 \(Po\) is the output power in watts,
 \(E\) is the efficiency in percent.
Example Calculation
Example #1:
For an output power of 50 watts and an efficiency of 50%, the input power is calculated as follows:
\[ Pi = \frac{50}{50/100} = 100 \text{ watts} \]
Example #2:
With an output power of 40 watts and an efficiency of 30%, the input power is:
\[ Pi = \frac{40}{30/100} = 133.33 \text{ watts} \]
Importance and Usage Scenarios
Calculating the input power of brushless motors is critical for designing efficient power systems in drones, electric vehicles, and industrial machinery. It ensures that the motor receives the correct power supply to operate optimally without overheating or underperforming.
Common FAQs

Why is efficiency important in calculating input power?
 Efficiency indicates how well a motor converts electrical power into mechanical power. Higher efficiency means more output power for the same input power, affecting the design and performance of the system.

Can I use this calculator for any type of brushless motor?
 Yes, this calculator is applicable to all types of brushless motors, regardless of their size or application.

What if my motor's efficiency is unknown?
 If the efficiency is unknown, it's recommended to refer to the motor's datasheet or manufacturer's specifications. An average efficiency value can also be assumed based on typical values for similar motors.
This calculator simplifies the process of determining the required input power for brushless motors, aiding in the selection and design of power supplies and control systems.