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How is electric motor torque measured?
A relatively simple method to estimate electrical motor torque is to measure its electrical power input, the voltage and the current in the power line driving the motor. For most motors, torque is directly proportional to the current and can be derived from it by knowing shaft speed and motor efficiency.
How do you determine torque of a motor?
The required torque is calculated by multiplying the sum of load torque and acceleration torque by the safety factor. When the required torque for the motor varies over time, determine if the motor can be used by calculating the effective load torque.
How do you calculate electric motor torque?
How to Calculate Electric Motor Torque. Watts = volts * amps. 1HP (horsepower) = 746 watts. Torque (T) = ((HP(horsepower) / RPM (rotations per minute))) * 63,025 (constant) 1. Find the wattage from a motor that has the following nameplate data on its metal tag; 120 Volts at 10 amperes with a 3600-RPM.
Is the horsepower of the motor related to torque?
Horsepower is work done over time. So torque and horsepower are related, but they are not interchangeable. Each can be calculated using the equations below. When using units of HP for power and ft-lbs for torque, the constant is 5252. So when running a VFD at reduced speed, torque remains constant, but horsepower is reduced (see figure 2 below).
How to calculate the amount of torque needed?
Method 1 of 3: Finding Torque for Perpendicular Forces Find the length of the moment arm. The distance from the axis or rotational point to the point where force is applied is called the moment arm. Work out the force being applied perpendicular to the moment arm. The force applied perpendicular to the moment arm produces the greatest torque. Multiply the force times the distance to find the torque.
How do you determine torque?
Torque (also called moment — mostly by engineers) is calculated by multiplying force and distance. The SI units of torque are newton-meters, or N*m (even though these units are the same as Joules, torque isn’t work or energy, so should just be newton-meters).