Motor hates 3 things.

User should be noted what electrical Motor hates 3 things.

1.Water(Moisture)

Moisture makes electricity flow well.

If electricity flows on motor in moisture, it causes fire because the insulation is

destroyed.

2. Dust

Dust well absorbs moisture.

Piled dust is the cause of the breakdown of insulation in the motor.

In addition dust is also a cause of noise if dust come into the bearing. 

So, dust is the cause of shortening the lifetime of the motor.

3. Heat(High Temperature)

Heat of Motor is main cause of insulation breakdown.

Motor’s temperature is defined according to insulation class.

Motor parts’ temperature such as copper wire, tube, lead wire is regulated.

If the user does not follow this insulation regulation, motor’s lifetime is shorten.

The Structure of Induction Motor

The picture shows the simple structure of AC Induction Motor.
The parts like heart in Motor are Rotor and Stator.
Specifically Stator rotates Rotor by Electrical Energy, using Electrical Magnet.

Single Phase and Three Phase in AC Electricity & Motor

Explanation about  Single-phase and Three-phase

There is 120 phase difference per phase in the Three Phase.

Usually, we call each phase U/ V/ W or R/S/T.

Frequency in AC Eelectricity

Frequency(Hertz) : one cycle a second at Alternating Current(AC)

Korea, the U.S.A: 60Hz

Europe, Australia, China, Southeast Asian Countries: 50Hz

Japan: 50/60Hz

DC & AC Electricity

We've known what is Electricity last contents.
Before talking about Motor, finally I would like to tell you about AC & DC Electricity.

DC Electricity has both poles "+" and "-", and the shape of frequency is always linear.
AC Electricity doesn't have any pole, but a sign frequency is moving.

You may have a question why AC Electricity has 2 leadwires.
The reason is Electricity should be operated through connected Electricity road.

Easy understanding about Electricity

Let's back to the Basic.

There are so many people to use Motor in the world, but I'm not telling you not about Motor Kinds. Basically Motor is operated by Power, and the power is almost Electricity.
Now I show you the simple explanation about Electricity.

Finally when we are going to use Motor, we need to consider electrical conditions. I will tell you next time about this.

Any question? Leave a message or comment.

What is Rating on AC Motor_Induction Motor?

Rating means how long the motor can use.
There are 3 Ratings on AC Induction Motor.

Continuous Rating

- When the rated load is imposed under the rated voltage and frequency, the continuous rating means that it can guarantee the continuous operation which will not result in exceeding the specified temperature and comply with the other requirements.

* Induction Motor

* 2 Pole Motor

Short-time Rating

-When the rated load is imposed under the rated voltage and frequency, the intermittent rating means the operation within a specified period of time(ex. 5min, 10min, 30min,etc..) will not result in exceeding the specified temperature and comply with the other requirements.

* Reversible Motor

* Torque Motor

Intermittent Periodic Rating

-When a motor is used with the rated load under the rated voltage and frequency, the interactive rating means that the cyclic operations of stopping and running with a certain load will not result in exceeding the specified temperature and comply with the other requirements.

 * Brake Motor

 * Clucth Brake Motor