Modern electrical motors are available in many different forms, such as single phase motors, three-phase motors, brake motors, synchronous motors, asynchronous motors, special customized motors, two speed motors, three speed motors, and so on, all with their own performance and characteristics.
For each type of motor there are many different mounting arrangements, for example: foot mounting, flange mounting or combined foot and flange mounting.
The cooling method can also differ very much, from the simplest motor with free self-circulation of air to a more complex motor with totally enclosed air-water cooling with an interchangeable cassette type of cooler.
The two letters IP (International Protection) state the degree of protection followed by two digits, the first of which indicates the degree of protection against contact and penetration of solid objects, whereas the second states the motor’s degree of protection against water.
The end of the motor is defined in the IEC-standard as follows:
- The D-end is normally the drive end of the motor.
- The N-end is normally the non-drive end of the motor.
Squirrel cage motors
In this book the focus has been placed on the squirrel cage motor, the most common type of motor on the market. It is relatively cheap and the maintenance cost is normally low.
There are many different manufacturers represented on the market, selling at various prices.
Not all motors have the same performance and quality as for example motors from ABB. High efficiency enables significant savings in energy costs during the motor’s normal endurance. The low level of noise is something else that is of interest today, as is the ability to withstand severe environments
|Title:||Softstarter Handbook – ABB Automation Technology Products AB, Control|
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Very good information
IP means Ingress Protection, Not International Protection (Refer IEC 60529).
It is International Protection, see BS EN 60529 Section 4 “Designations” and 4.1 “Arrangement of the IP code”.
Very good and useful! thanks!
i’m a beginner in electrical enginnering and i want to know how to calculate the limit of current when i have a blocked rotor(jam protection) in a pump application.
Please give load characteristics of various types of pumps,conveyors,crushers,compressors etc and torque produced by each type of motors to select suitable starter.
Very good information, thank you
Please provide the correct size of circuit breaker for a variable speed drive motor with a name plate full load current of 138A.
I need the circuit diagram of the Siemens soft starters RW40 56
Good article but is IP not suppose to be Ingress Protection rather than International Protection?
ingress protection is correct word.
Thanks for the useful information and documents.
I am looking for a sponsor to certify innovative features of three-phase induction motor has to participate in the exhibition
Problem opening file format after succesful download,..
Very good material.