Table of Contents
- 1 What is the condition for maximum efficiency to occur?
- 2 What is the maximum efficiency of a motor?
- 3 What is the condition for maximum efficiency variable loss?
- 4 What is the condition for maximum efficiency in DC generator?
- 5 What affects the efficiency of a motor?
- 6 At what load does power transformer produce the maximum efficiency?
What is the condition for maximum efficiency to occur?
The transformer will give the maximum efficiency when their copper loss is equal to the iron loss.
What does maximum efficiency mean?
1 the greatest possible amount, degree, etc. 2 the highest value of a variable quantity.
What is the maximum efficiency of a motor?
Most electric motors are designed to run at 50\% to 100\% of rated load. Maximum efficiency is usually near 75\% of rated load. Thus, a 10-horsepower (hp) motor has an acceptable load range of 5 to 10 hp; peak efficiency is at 7.5 hp. A motor’s efficiency tends to decrease dramatically below about 50\% load.
When the efficiency of transformer is high?
As transformer operates on the magnetizing phenomenon and it has no rotating parts, its efficiency is very high. It usually stays above 95\% but as the power flow across a transformer is very high even small changes in terms of efficiency percentage gives significant energy savings.
What is the condition for maximum efficiency variable loss?
The efficiency of a DC generator is maximum when those losses proportional to the square of the load current. Variable losses are equal to the constant losses of the DC generator i.e. armature circuit loss is equal to the sum of no-load rotational loss and field circuit loss.
What is the maximum efficiency at unity PF load?
It also depends on load power factor and has the maximum value at a power factor of unity. The transformer on which load is variable (like distribution transformer) is designed to give maximum efficiency at about 75\% of full load.
What is the condition for maximum efficiency in DC generator?
What is the maximum efficiency of a machine?
Since a machine does not contain a source of energy, nor can it store energy, from conservation of energy the power output of a machine can never be greater than its input, so the efficiency can never be greater than 1.
What affects the efficiency of a motor?
Motor performance depends on three elements such as voltage across terminals, resistance across terminals, and magnetic force.
What is the condition for maximum efficiency in DC motor?
At what load does power transformer produce the maximum efficiency?
Maximum Efficiency Its load depends on distribution demand. Whereas power transformer is designed for maximum efficiency at 100\% load as it always runs at 100\% load being near to generating station.
Why efficiency of transformer is high?
Electrical transformer is a static device which transfers the power from one circuit to other through electromagnetic induction. Losses in the transformer are very less compared to any other rotating machine, hence efficiency of transformers will be very high.