Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 56, Problem 3SQ
To determine
Name the device that is suited for maintaining a large difference in the input and output speed and explain the reason.
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3. Find the transfer function, 0,(s)/E,(s), for the motor and load shown in the figure below. The torque-speed curve is
given by Tm = -8awm + 200 when the input voltage is 100 volts.
edt) Motor
| N = 20
N2 = 100
N3= 25
Ja = 1 kg-m?
Da = 5 N-m-s/rad
DL = 800 N-m-s/rad
N4 = 100
J = 400 kg-m²
A variable-speed electric drive can operate in two distinct speed control regions. Name these regions, explain the principal difference between them and specify which quantity is kept constant in each of the two.
..
1) Derive the transfer function of Amature controlled DC shunt motor
Chapter 56 Solutions
Electric Motor Control
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- b) What do you understand by multi quadrant operation in an Electric drive? What are the advantages of a multi quadrant drive?arrow_forwardA shunt motor running on no-load takes 5 A at 200 V. The resistance of the fieldcircuit is 150 ohms and of the armature 0.1 ohm. Determine the output andefficiency of motor when the input current is 120 A at 200 V.arrow_forwarda) The speed control of an AC motor can be achieved by using 2 common types of drive circuit, namely the six step and the PWM types. Describe with the aim of diagrams, the difference between the two types of controller. You should list and explain the power electronic devices used, as well as the details of the DC link for each device.arrow_forward
- Step angle of a stepper motor drive with number of poles 8 and 50 rotor teeth is ...........arrow_forward: Fill in the blank fields below: (1) A dc drives are operating in- - quadrants when the supply voltage is- --than the back emf, and in the --------quadrants when the supply voltage is ---------------than the back emf. „For a speed less than the base speed, the ----- -are maintained constant at their rated value (2) .and the---------is varied to control the speed (3) In a single phase semi-converter dc drives a freewheeling diode is used to ensure- (4) In a single phase full-converter dc drives, the motor is operating in the 1ª quadrants if the armature converter firing angle is-----and in the 4 th quadrants if the armature converter firing angle is-------. (5) In constant power drive, the speed is controlled byarrow_forwardBack emf of a DC Drive is directly proportional to speed Select one: True Falsearrow_forward
- . Consider the DC motor shown in Figure 2. Drive the transfer function (s)/V(s). Assume that all initial conditions are zero. Assume the motor torque and back e.m.f constants are equal Kt = K₂ = K. Applied + Voltage www Motor Torque ARMATURE CIRCUIT back emf min bo motor friction Fixed Magnetic Field Moment of Inertia of Motorarrow_forwardAnswe completely and elaborate complete details. No plagiarism 1.) Define the working principle of AC Motor.2.) Define the different types of AC Motor.arrow_forwardpls answer soonarrow_forward
- Which machine the following equation is describing? Vs = Ris + V₁ + Vc A. Series RLC circuit B. Separately excited DC motor C. Permanent magnet DC motorarrow_forwardpower electronics and drivesarrow_forwardThe input current to a 220v, compound motor at no load is 6 A. The shunt field circuit resistance is 220 ohms; the armature resistance is 0.10 ohm and the series field resistance is 0.80 ohm. What is the SPL? A. 1153.31 W B. 1066.22 W C. 1232.54 W D. 1073.25 Warrow_forward
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