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Mechanical Power Formula:
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Mechanical power in electric motors is the rate at which work is done by the motor. It represents the actual usable power output at the motor shaft and is crucial for determining motor performance and efficiency.
The calculator uses the mechanical power formula:
Where:
Explanation: The formula shows that mechanical power is the product of torque and angular velocity. Higher torque or higher speed results in greater mechanical power output.
Details: Calculating mechanical power helps in selecting the right motor for an application, evaluating motor performance, and determining energy efficiency. It's essential for proper system design and energy management.
Tips: Enter torque in Newton-meters and angular speed in radians per second. For RPM values, convert to rad/s by multiplying by 2π/60. All values must be positive numbers.
Q1: How do I convert RPM to rad/s?
A: Multiply RPM by 2π/60 (approximately 0.10472). For example, 1000 RPM = 1000 × 0.10472 = 104.72 rad/s.
Q2: What's the difference between mechanical and electrical power?
A: Electrical power is input power (voltage × current), while mechanical power is output power. The difference represents losses in the motor.
Q3: What are typical torque values for electric motors?
A: Small motors might produce 0.1-1 Nm, while industrial motors can produce hundreds of Nm. Always check motor specifications.
Q4: How does power relate to motor efficiency?
A: Efficiency = (Mechanical Power Output) / (Electrical Power Input) × 100%. Higher efficiency means less energy wasted as heat.
Q5: Can I use this for hydraulic or pneumatic motors?
A: Yes, the same formula applies to any rotational power system, though you may need to consider additional factors like fluid pressure.