You can use 20 amp fuses and should be OK if the motor is good. It sounds like your no-load current is in the right ball park, but you should check the manufacturers data for actual no-load current. You also need thermal overloads if not internal to the motor.
Is it bad to run a motor with no load?
A motor is a natural speed govenor. Without as prop it will only spin about 30% faster than with a correctly sized prop. So as long as you are not using too high a voltage there is absolutely NO problem with running any electric motor no-load.
What should be no load current of an induction motor?
The I2R losses on the primary side are neglected as they vary with the square of the current, as we know that the no-load current is 20-30% of the full load current, As the motor is running at no load, the total input power is equal to the constant iron loss, friction, and windage losses of the motor.
What is full load current of motor?
Definition of ‘full load current’
A full load current is the largest current that a motor or other device is designed to carry under particular conditions. … A full load current is the largest current that a motor or other device is designed to carry under particular conditions.
What is loading of motor?
Part-load is a term used to describe the actual load served by the motor as compared to the rated full-load capability of the motor. Motor part-loads may be estimated through using input power, amperage, or speed measurements.
Which motor has highest no load speed?
Explanation: At no load, armature current tends to zero, flux φ tends to zero, where speed is inversely proportional to the flux, speed will tend to infinity. Thus, no load speed of DC series motor is highest.
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.
Why would a motor draw too much current?
Electrical overload or over-current is caused by an excessive current flow within the motor windings, exceeding the design current which the motor is able to carry efficiently and safely. This can be caused by a low supply voltage, resulting in the motor drawing in more current in an attempt to maintain its torque.
Which power is mentioned on a nameplate of a motor?
Which power is mentioned on a name plate of a motor? Explanation: Name plate of the motor shows rated values i.e. rated speed, rated current, rated voltage. It also shows output power available at shaft when all other quantities are set to rated values.
Which of the following motor has the highest starting torque?
The capacitor start motor develops a much higher starting torque of about 3 to 4.5 times of the full load torque.