How to design a motor with a given set of requirements?

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SUMMARY

The discussion focuses on designing a 3-phase synchronous motor with specific requirements: 480V, 50Hz, hysteresis type, and utilizing alnico material to achieve an output torque of 0.6 N.m. The motor's dimensions must not exceed 150 mm, and the air gap should be at least 0.5 mm. Key references for initial design values and procedures include the thesis "Electromagnetic Design of a Solid Steel Rotor Motor for Demanding Operation Environments" by Tuomo Aho from Lappeenranta University of Technology, which provides insights into the design of specialized motors.

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  • Understanding of 3-phase synchronous motor design
  • Knowledge of hysteresis motor principles
  • Familiarity with alnico material properties
  • Basic concepts of electromagnetic design
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Engineers and designers involved in motor design, electrical engineers focusing on electromagnetic applications, and students studying advanced motor technologies will benefit from this discussion.

omidfn
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Let's suppose we are given a set of requirements and we are to design a motor that meets them. Requirements are:
3 phase synchronous, 480v, 50Hz and of hysteresis type and alnico is the only available option and it should deliver a 0.6N.m output torque.

Dimensions should not exceed 150 mm and air gap should not be smaller that 0.5 mm.

Where to start the design? What should be the initial values to start with and are there any references that can give these typical values that later on will be tuned during the design steps? Is there any reference that offers a procedure for design of special motors like the one in question?

If there are good books and references that you know of please let me know.

Cordialy,
Omid Feyz Najafian
 
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If the supply system is a three phase system then a rotating magnetic field will be created in the air gap. The rotor will behave as an induction motor with solid steel rotor.
See-for instance:
ELECTROMAGNETIC DESIGN OF A SOLID STEEL ROTOR MOTOR FOR DEMANDING OPERATION ENVIRONMENTS
by by Tuomo Aho
[Thesis for the degree of Doctor of Science (Technology)]
LAPPEENRANTA UNIVERSITY OF TECHNOLOGY Finland
December 2007
 
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Babadag said:
If the supply system is a three phase system then a rotating magnetic field will be created in the air gap. The rotor will behave as an induction motor with solid steel rotor.
See-for instance:
ELECTROMAGNETIC DESIGN OF A SOLID STEEL ROTOR MOTOR FOR DEMANDING OPERATION ENVIRONMENTS
by by Tuomo Aho
[Thesis for the degree of Doctor of Science (Technology)]
LAPPEENRANTA UNIVERSITY OF TECHNOLOGY Finland
December 2007

Dear Sir,

Thank you for your time.

sincerely,
Omid Feyz Najafian
 
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Likes jim hardy
Most likely this can only be answered by an "old timer". I am making measurements on an uA709 op amp (metal can). I would like to calculate the frequency rolloff curves (I can measure them). I assume the compensation is via the miller effect. To do the calculations I would need to know the gain of the transistors and the effective resistance seen at the compensation terminals, not including the values I put there. Anyone know those values?

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