ELECTRICAL ENGINEERING QUESTIONS PART1

Hi guys.I am back !!! I apologize for posting the content after such a long time.A person has asked "Could you give an idea of which motors are being used in different appliances? and it is my pleasure to answer this Electrical Engineering question.Do you guys know in our mobile phone there is a motor.yes, it is used for vibration which is caused in the silent mode.These motors are called as vibration motors.

Next we will take the thing which we use very oftenly, PC's and Laptops.We use the Brushless DC motor fans for cooling the processor.In PC SMPS serves as the source for motor and in Laptop battery is the source for motors.Also the for CD drives we use the brushless motors.

In fans single phase Induction motors are used.In Mixer grinders and Grinders also we use single phase Induction motors only.But for the Grinders which has high capacities, we will be using 3 phase Induction motor up to 5HP motors.For traction,DC motors are used.The supply is high voltage single phase supply.AC supply is converted to DC using the Power Electronic Converters and are used to feed the DC motors.

FAN SPEED REGULATOR POWER CONSUMPTION

Here is the next question about the Fan Speed Regulator.

Will the power consumption  be same for normal regulator and electronic regulator at same speed ?

The answer to this would be no.The reason behind this is normal regulator uses resistances for the speed control of the fan.So the resistances will act as a potential divider,and the applied voltage to the fan changes the based on the resistance position.

At maximum speed the full voltage is applied.When the regulator position is decreased,resistance would be introduced and the voltage applied to the fan decreases which in turn reduces the speed of the fan.When the regulator position is kept at low speed, the power wastage across the resistance will be more.

Therefore the overall efficiency of the normal speed regulator is poor.

The electronic speed regulator uses the semi conductor devices.The voltage regulator is used to change the applied voltage to the fan.So the power loss is negligible in the electronic fan speed regulator.Therefore overall efficiency of the electronic regulator is high.