Motor Efficiency Calculation

What is the efficiency of a one-phase motor with a power of 2 Hp given as 85%?

What is the input power of this motor and the current drawn by the motor at 220V mains voltage?

Answer:

The input power of the motor is 1492 W and the current drawn by the motor at 220V mains voltage is 6.78 A.

For the given one-phase motor with a power of 2 Hp and an efficiency of 85%, we can calculate the input power and current drawn by the motor at 220V mains voltage as follows:

First, we convert the power from horsepower (Hp) to watts (W). Since 1 Hp is equivalent to 746 W, the input power of the motor can be calculated as:

Input Power = 2 Hp x 746 W/Hp = 1492 W

Next, we can find the current drawn by the motor using the formula:

Current (A) = Power (W) / Voltage (V)

Substituting the values, we get:

Current = 1492 W / 220 V = 6.78 A

Therefore, the input power of the motor is 1492 W and the current drawn by the motor at 220V mains voltage is 6.78 A.