# What determines the torque of an electric motor?

What determines the torque of an electric motor?

## What determines the torque of an electric motor?

Torque is nothing but a momentary force developed at the time of force is applied to the motor. The unit of torque is N.m (Newton-meter). In other words, Torque T(N.m) is equal to the ratio between the electrical power P(W) in watts to the acceleration.

How do you calculate the horsepower of an electric motor?

Use this formula to estimate motor horsepower: Horsepower (hp) = Voltage x Amerage x % EFF x power factor x 1.73/746.

Are electric motors rated in horsepower?

Standard horsepower ratings for electrical motors – 1 to 4000 hp are indicated below: 1, 1.5, 2, 3, 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 3000, 3500, 4000.

### How much torque does a 100 hp electric motor have?

approximately 150 lb-ft.
For example, a 100 horsepower motor operating at 3,600 rpm produces a torque of approximately 150 lb-ft. At 1,800 rpm, torque would be about 300 lb-ft and at 1,200 rpm about 450 lb-ft.

How do you convert torque to horsepower?

1. Torque (lb.in) = 63,025 x Power (HP) / Speed (RPM)
2. Power (HP) = Torque (lb.in) x Speed (RPM) / 63,025.
3. Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM)
4. Power (kW) = Torque (N.m) x Speed (RPM) / 9.5488.

What is the difference between electrical HP and mechanical HP?

The Electric horsepower – European unit number 1.01 hp E converts to 1 hp I, one Mechanical horsepower. It is the EQUAL power value of 1 Mechanical horsepower but in the Electric horsepower – European power unit alternative.

## Why do electric motors have low horsepower?

Electric motors have a HP-rating limited to its design, so the inverse happens where the torque reduces as speed increases.

How do you get more torque from an electric motor?

To increase the torque (if 9V won’t get it high enough) you can increase the supply voltage, and to decrease the speed you can pulse width modulate (PWM) the supply input to the motor.

What does it mean when a car has 300 horsepower?

A car company may say that one of their gasoline-powered engines has 300 horsepower, but that’s actually peak horsepower. That number is the highest amount of power the engine can deliver at a certain number of revolutions per minute (RPM), and that number is usually pretty high on the tachometer.

### What is the torque of a 100 hp motor?

The torque delivered from an electrical motor producing 100 hp at speed 1000 rpm can be calculated as T = (100 hp) 63025 / (1000 rpm) = 6303 (lbf in) To convert to pound-force foot – divide the torque by 12.

What is the relationship between horsepower and torque?

Mathematically, there’s a relationship between horsepower, torque, and engine speed. Engines that make massive amounts of torque at low engine speeds can achieve the same horsepower numbers as engines that don’t make much torque but operate at very high speeds.

What is the starting torque of an electric motor?

The Locked Rotor Torque or Starting Torque is the torque an electrical motor develops when starting at zero speed. A high Starting Torque is more important for application or machines hard to start – like positive displacement pumps, cranes etc.