Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Power Control
A chopper converts fixed de input voltage to a controllable dc output voltage. It is the single stage dc to dc conversion device. It is a high speed on/ off semiconductor switch. The control of a dc series motor. When the chopper is ON ( this is ON period it means chopper switch is closed) for the period Ton output voltage Vo ( which is then applied to dc series motor) is equal to source voltages.
Vs in this period the inductance of armature winding will store the energy. When the chopper is OFF for period Toff ( it means chopper switch is Opened) output voltage will be zero but armature current will be flowing through freewheeling diode FD series fields and armature.
Figure voltage and current waveforms of a chopper controlled dc series motor
Therefore the output voltage can be controlled by varying duty cycle α hence the speed of dc series motor can be controlled.
Explain the programming of 8254 microprocesser. 8254 Programming: All counters are individually programmed through writing a control word, followed with the initial count.
Construction - UniJunction Transistor: Construction: The basic structure of uni junction transistor is shown in fig. (a). It essentially consists of a lightly doped N type s
Question: (a) A tube from one end of a differential pressure transducer is placed at the bottom of a cylindrical cup (D= 0.8m, H= 0.1m) to measure mass flow rate. The cup i
Q. Explain digital Storage Oscilloscope (DSO) with neat diagram, (b) Give the difference between analog and digital storage oscilloscope. Principle of operation : The availa
GIS Based Mapping of Electrical Network: You have learnt in which the Geographic Information System is a system of mapping of the complete electrical network. The question we
Q. Explain working of Voltmeter? In order tomeasure the potential difference between two terminals or nodes of a circuit, a voltmeter is connected across these two points. A pr
Q. Three identical impedances of 30 30° are connected in delta to a three-phase 173-V system by conductors that have impedances of 0.8 + j0.6 each. Compute the magnitude of the l
Design a MOD-6 synchronous counter using J-K Flip-Flops.
single phase voltage source inverter complete circuit
Interpoles and Compensating Windings: The most generally used method for aiding commutation is by providing the machine with inter poles, also known as commutating poles, or si
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd