In the most general sense, the load is the thing that is connected to the output of an electrical circuit. The load can basically be anything. For example, it can be a resistor, or a capacitor or an inductor, or a transistor, or a motor, or an air conditioner etc. … “Load” can also be used as a verb.
Is a motor an example of a load?
An electrical load is the part of an electrical circuit in which current is transformed into something useful. Examples include a lightbulb, a resistor and a motor. A load converts electricity into heat, light or motion.
Are motor started under load?
Some motors can start under load, and some can’t. Where a motor is coupled to the load without an intervening clutch system on the load end, assume the motor cannot start under load unless you verify it can. And that generally means it needs to be a Design D motor, which has “extra high” starting torque.
Is a DC motor a load?
A DC motor is a reactive load.
What is the load of an electric 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.
What does loading a motor mean?
The load can basically be anything. For example, it can be a resistor, or a capacitor or an inductor, or a transistor, or a motor, or an air conditioner etc. The term “load” can also mean “the amount of power” or “the amount of current” drawn by the thing that is connected to the output of the circuit.
What is an example of load?
The definition of a load is something that a person, animal or thing is carrying. An example of load is furniture stacked into a moving van. … An example of load is to pile a truck with furniture. An example of load is to fill up on cheeseburgers and fries.
When load is added to a motor?
Assuming it is not being controlled at a constant speed, then really the same thing happens in all three cases. As the load is increased, the motor will slow down, and the torque will increase.
Why does a motor draw more current under load?
As more mechanical load is applied, the motor slows, the back emf decreases, and more current is drawn. If sufficient mechanical load is applied, the motor stalls/stops rotating, and therefore there is no back EMF at all, and the current is limited by the supply or by the resistance of the windings.
What is starting current of a motor?
Starting current is the current required to start a motor from stand-still condition. It is essential that a high current is required for producing starting torque. Generally starting current is 6 – 8 times FLC (full load current). This data is essential for selecting rating of Circuit Breaker or Fuses.
Is a motor a resistive load?
As you might guess from the name, resistive loads only resist the current and are the simplest type of load. In inductive loads, such as an electric motor, the voltage wave is ahead of the current wave.
Is motor an inductive load?
Any devices or equipment that have coils in them are inductive in nature. Examples of inductive load are motors, solenoids, contactor coils, compressors, speakers, relays, transformers, inductors, power generators, etc.
What happens when DC motor is loaded?
As more load is applied the motor draws more current, which increases torque. However as current flows through the windings their resistance causes the effective voltage to drop, so speed decreases. Below 50% rpm the power output will also decrease, reaching zero at stall.