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close this bookElectrical Machines - Basic Vocational Knowledge (IBE - Deutschland; 144 pages)
View the documentIntroduction
Open this folder and view contents1. General information about electrical machines
Open this folder and view contents2. Basic principles
close this folder3. Execution of rotating electrical machines
View the document3.1. Size
close this folder3.2. Designs
View the document3.2.1. Definition
View the document3.2.2. Designation
Open this folder and view contents3.3. Degree of protection
Open this folder and view contents3.4. Cooling
Open this folder and view contents3.5. Mode of operation
View the document3.6. Heat resistance categories
Open this folder and view contents3.7. Connection designations of electrical machines
Open this folder and view contents3.8. Rotating electrical machines in rotational sense
View the document3.9. Rating plate
Open this folder and view contents4. Synchronous machines
Open this folder and view contents5. Asynchronous motors
Open this folder and view contents6. Direct current machines
Open this folder and view contents7. Single-phase alternating current motors
Open this folder and view contents8. Transformer
 

3.2.2. Designation

Designs are given code letters “IM” in the same manner as degrees of protection and coolants. The letters also indicate the design group, assembly variety and shaft end execution.


Example

Survey 7 - Design category explanations (first figure)

1 Foot machine with end shields
2 Foot machines with end shields and end shield flange
3 Machines without feet with end shields and flange on one shield
4 Machines without feet with end shields, with casing flange
5 Machines without bearings
6 Machines with end shields and pillow blocks
7 Machines with pillow blocks (without and shields)
8 Vertical machines which are not covered by the categories IM 1 to IM 4
9 Specially constructed machines according to assembly type

Survey 8 - Shaft end type of rotating electrical machines (fourth figure)

0 Without shaft end
1 With a cylindrical shaft end
2 With two cylindrical shaft ends
3 With a conical shaft end
4 With two conical shaft ends
5 With a flange shaft end
6 With two flange shaft ends
7 With flange shaft end on the D-side and cylindrical shaft end on the N-side
8 All other types with shaft ends.

The most common design groups are IM 1001 and IM 3001. The assembly variety is indicated through two numbers. Assembly variety relates to the erection site of the machine regarding the shaft axle and holding elements.


Survey 9 - Frequent design categories

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