Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 1, Problem 3SQ
To what does current limiting, or compensating time, acceleration refer?
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Please compute the torque required for this problem. Thankyou.
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Hi, my topic is about Optical Instruments: Elecricity and Magnetism, please use this as reference when answering, thanks!What is the basic principle of an electric motor and generator?
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- How may additional steps of acceleration be added?arrow_forwardTHIS QUESTION IS FROM BOOK ELECTRIC MACHINE 1 FROM TOPIC DC MOTOR A 255 V, DC lathe machine, (not a 2 pole machine) has armature resistance and series resistance are0.15Ω and 170Ω respectively. The motor has 25mWb flux per pole. The ratio of pole to parallel pathsis unity. The product of this ratio and number of turns in armature section is 1000. When it runs light, ithas a speed of 1200 rpm. If it runs at maximum load, it takes a current of 70A. (4) Calculate the no load armature current. and no load shunt current.(6) Calculate the current drawn by the machine.(7) Calculate the variable losses on load and armature power when it runs light.arrow_forwardTHIS QUESTION IS FROM BOOK ELECTRIC MACHINE 1 FROM TOPIC DC MOTOR A 255 V, DC lathe machine, (not a 2 pole machine) has armature resistance and series resistance are0.15Ω and 170Ω respectively. The motor has 25mWb flux per pole. The ratio of pole to parallel pathsis unity. The product of this ratio and number of turns in armature section is 1000. When it runs light, ithas a speed of 1200 rpm. If it runs at maximum load, it takes a current of 70A. (1) Which machine is this one, shunt or series ?(2) Is machine lap wound or wave wound?(3) Calculate the no load back EMF.(4) Calculate the no load armature current.(5) Calculate the no load shunt current.(6) Calculate the current drawn by the machine.(7) Calculate the variable losses on load.(8) Calculate the armature power when it runs light.(9) Calculate the stray losses when it runs light.(10) Calculate the full load armature current.(11) Calculate the full load back EMF.(12) Calculate the Variable losses on maximum possible load.(13)…arrow_forward
- the deflection torque of ammeter is directly proportional to the current through it. If a current 10 A deflects the pointer by 90○ . Find the value of current for a deflection of 60○ when the instrument is (a) spring controlled and (b) gravity controlled.arrow_forward"A motor is used to drive a hoist. Motor characteristics are given by: [ Quadrants 1,I1,IV: N= -8.2T+2031 , RPM // Quadrants II,III,IV; N= -8.2T-2031, RPM] when hoist is loaded TL= 188 , Nm and when it is empty TL= -72 , Nm Calculate the equilibrium speeds for operation in all four quadrants.. Choose Only one answerarrow_forwardQuestion 7 Using the magnetorheological properties of the materials, how could we design a product that allows a person with reduced motor skills to be transported. Full explain this question very fast solution sent me step by steparrow_forward
- Torque on a Current Loop: Motors and Meters• Describe how motors and meters work in terms of torque on a current loop.• Calculate the torque on a current-carrying loop in a magnetic field.arrow_forwardElectrostatic levitation in comb-drives: Movable fingers in comb-drive actuators/sensors can experience a levitation effect when the plane underneath the structure is biased at the same potential as the fingers, shown by Zo in figure below. Explain qualitatively why such a levitation happens in the freestanding structure. Fixed electrode Vp Movable finger -Zo ↑ GND Fixed electrode V₂ GND Plane N Out of planearrow_forwardThe intermediate between mechanical energy and electrical energy in electrical machines is... a) A DC battery b) Responsible for energy flow from the rotor to the stator in case of generator mode c) The magnetic field storing energy temporarily d) Responsible for energy flow from stator to rotor in case of generator mode Next Page Page 1 of 4 Submit Quiz O of 4 questions savedarrow_forward
- Explain how a MagLev train utilizes or applies principles of: a) kinematics/the dynamics of motionb) energy and momentum Please answer a) and b) seperately and include specific laws, equations, theorems, etc. to help in answering both questions.arrow_forward1. Electric motors are devices that convert A. electrical; mechanical energy into energy C. chemical; potential B. mechanical; electrical 2. What two forces are required for generators and electric motors to work? D. mechanical, kinetic A. magnetism and thermal C. electricity and magnetism B. electricity and thermal D. magnetism and radiant 3. What word best fits this definition: A device which converts electrical energy into mechanical energy usually through the rotation of an electromagnet in the field of stationary magnet. A. Armature C. motor B. Electromagnet D. System 4. The rotating part of a motor. A. System C. electromagnet B. Brush D. armature 5. The contacts between the armature and the source of power in a motor. A. Electromagnet C. force field B. Ferromagnetic D. brushes 6. What is the part of a simple D.C motor that reverses the direction of current through the coil every half-cycie A. the armature C. the commutator B. the brushes D. slip rings 7. A magnet's magnetic field…arrow_forwarda) State, in words, the two laws of electromagnetic induction. b) The diagram below illustrates the main components of one type of electromagnetic braking system. A metal disc is attached to the rotating axle of a vehicle. An electromagnet is mounted with its pole pieces placed either side of the rotating disc, but not touching it. When the brakes are applied, a direct current is passed through the coil of the electromagnet and the disc slows down. coil electromagnet pole piece axle metal discarrow_forward
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