Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 31, Problem 1SQ
Excluding slip, at what speed (r/min) will an eight-pole, 60-hertz, 240-volt motor run?
Expert Solution & Answer
To determine
Calculate the speed in rpm for of an eight pole,
Answer to Problem 1SQ
The speed in rpm of a squirrel cage induction motor is
Explanation of Solution
Given data:
The number of poles
The frequency
The line voltage
Formula Used:
Write the expression to calculate the speed in rpm of a squirrel cage induction motor.
Calculation:
The total number of poles in the motor is
Substitute
Conclusion:
Thus, the speed in rpm of a squirrel cage induction motor is
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Students have asked these similar questions
b) Draw the magnitude and phase bode plot
c) Given Cdb=0.02pF, how will the frequency response change, draw the resulting magnitude and phase bode plotplz help me to solve part b and c.
Medium 1 is a lossless dielectric (ε₁, μ₁ = μo, σ₁ = 0)
Medium 2 is a perfect electric conductor (PEC) ( 2 = 0, μ2 = μo, σ₂ = ∞)
[ Moσ = 0] [ε0 μ₁ σ₂ = ∞ ] (J=σE is finite, E = 0)
E(z) Exe² +Пe₁²]
1. For the case εr] =
λι =
=
E2(z)-0
-
1 (vacuum), E₁x 1 V/m and a frequency f = 500 MHz determine:
n₁ =
12=
2. Determine:
r =
T=
3. Using this I show that the total electric field E₁0(z) in region 1 can be written as:
E(z) = -2jE, sin(2лz/λ)✰
4. The magnitude E10(z) will show an interference pattern. The SWR (standing wave ratio) is the
Emax/Emin ratio of the magnitude of the total electric field in region 1. What is the SWR?
E (z) = 2|E|sin(2лz/2₁)|
E" (z)
SWR A
Imax
E(z)
Imin
1+r
1-||
tot
5. Roughly SKETCH the magnitude of E10(z) and E20(z) on the graph below.
E₁tot(z)
tot
E20(z)
-0.40
-0.30
-0.ło
z=0
+0.1b +0.20
would anyone be able to tell me the amount of wire needed for this electrical plan in this house? and if possible would anyone be able to tell me the amount of any other materials needed (wire sizes, box sizes/styles)
Chapter 31 Solutions
Electric Motor Control
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