Electric Machine Sizing Equations

Importance of Motor Design and Standards of Electric Motors — Lesson 1

Output Power and Volume (D2L) Product Equation — Lesson 2

Rewinding and Testing of Electric Motor — Lesson 3

Figure of Merits for Electric Motors — Lesson 4

Output Power (D3L) Product Equation - I — Lesson 5

Output Power (D3L) Product Equation - II — Lesson 6

Analysis of Copper Function and Output Function — Lesson 7

Example Problem on Output Power Equation — Lesson 8

Output Power (D2.5L) Product Equation — Lesson 9

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Course Assessment — Electric Machine Sizing Equations

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Course Assessment — Electric Machine Sizing Equations

Electric Machine Sizing Equations Practice Quiz Course Assessment — Electric Machine Sizing Equations

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Question 1 of 10

1. Question
What does the efficiency class of a machine indicate?
- The cost of the machine
- The size and volume of the machine
- The performance of the machine
- The materials used in the machine
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Question 2 of 10

2. Question
What are the factors limiting magnetic and electric loading? (Select the three correct answers)
- Material saturation limits
- Losses
- Thermal mechanisms
- Gravitational mechanisms
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Question 3 of 10

3. Question
What does the power density represent in machine design?
- Power per unit volume
- Power per unit area
- Power per unit weight
- Power per unit length
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Question 4 of 10

4. Question
What is the effect of increasing the aspect ratio on the volume of the rotor?
- The volume increases
- The volume decreases
- The volume remains the same
- The volume becomes zero
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Question 5 of 10

5. Question
What parameters are directly proportional to the output power and output torque? (Select the two correct answers)
- Volume of the rotor
- Magnetic shear stress
- Power factor
- Efficiency
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Question 6 of 10

6. Question
What are the physical dimensions of a machine that can be calculated from the power equation? (Select the three correct answers)
- Outer diameter of the stator
- Inner diameter of the stator
- Length of the core
- Width of the core
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Question 7 of 10

7. Question
What is the lambda value in the context of D Cube L sizing equations?
- Ratio of the outer diameter of the stator to the inner diameter
- Ratio of the inner diameter of the stator to the outer diameter
- Ratio of the flux density at the air gap to the flux density at the core
- Ratio of the flux density at the core to the flux density at the air gap
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Question 8 of 10

8. Question
How can the output power be maximized?
- By manipulating the magnetic flux density
- By manipulating the electrical current density
- By manipulating the synchronous speed
- All of the above
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Question 9 of 10

9. Question
What happens when you maximize the output function in an electrical machine?
- The output power decreases
- The output power and torque decrease
- The output power and torque increase
- The output power increases
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Question 10 of 10

10. Question
What is the (D3L) product used for in electrical machines?
- Determining the power rating
- Selecting the voltage
- Determining the dimensions
- Selecting the frequency
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