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.
What is extended data output RAM? EDO RAM: A slight modification to the DRAM structure changes the device in an EDO (extended data output) DRAM device. Inside the EDO memory, a
Q. Explain Demodulation of DSB? Demodulation of DSB SC AM signals requires a synchronous demodulator, which is also known as coherent or synchronous detector. That is, the demo
Q. Explain function of application layer? Layers of OSI model are as follows: (1) The Physical Layer: This defines an interface in terms of connections, voltage levels and
LAN topologies: Network topology is a physical schematic that demonstrates interconnection of the many users. There are four fundamental topologies as under: (i) Direct Connect
Permanent magnets are made of (A) Soft magnetic materials. (B) Hard magnetic materials. (C) Semi conductors. (D) Super conductors.
Explain immediate data addressing mode (with examples) available in microprocessors. Immediate Mode: The operand given in immediate mode is the actual data itself.
Q. Explain the operation of oscillators. Oscillator is a circuit that changes dc energy from the power supply into ac energy. An amplifier provided with a positive feedback bec
what is a transformer?
i have an assignment related to magnetic field i have attached the( MRI assignment sheet)[1] please read it carefully in the assignment 2 methods to get the results - one by
Q. Explain how LEDs are arranged in a seven segment display ? The illustration given below shows the basic layout of the segments in a seven- segment display. The segments the
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