1. What is the Shaft Power to Motor Power Formula?

The shaft power to motor power formula calculates the required motor power based on the shaft power output and the system's efficiency. It accounts for energy losses in the system.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{motor} \) — Required motor power (watts)
• \( P_{shaft} \) — Shaft power output (watts)
• \( Efficiency \) — System efficiency (decimal between 0 and 1)

Explanation: The formula divides the desired shaft power by the system efficiency to determine the motor power needed to account for energy losses.

3. Importance of Power Calculation

Details: Accurate motor power calculation is crucial for proper system design, ensuring the motor can deliver the required shaft power while accounting for efficiency losses.

4. Using the Calculator

Tips: Enter shaft power in watts and efficiency as a decimal (e.g., 0.85 for 85%). Efficiency must be between 0.01 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is typical motor efficiency?
A: Electric motors typically range from 70% to 96% efficient, with higher efficiency in larger motors.

Q2: Should I include gearbox efficiency?
A: Yes, if using a gearbox, multiply its efficiency with the motor efficiency for total system efficiency.

Q3: What if my system has multiple efficiency losses?
A: Multiply all individual efficiencies together to get the total system efficiency.

Q4: How does this relate to motor sizing?
A: The calculated motor power should be the minimum requirement; always include a safety factor.

Q5: Can this be used for hydraulic/pneumatic systems?
A: Yes, the same principle applies to any system where input power needs to overcome efficiency losses.