Electrical loads Circuit Diagram of Smps programmable power Supply

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Uninterruptable power supply (UPS) , Programmable power

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 1/10 STAY IN TOUCH SEARCH POSTS RECENT POSTS Fuse monitor HOME PROJECTS  CONTACT US ABOUT US TERMS OF SERVICE PRIVACY POLICY     Search … 

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 2/10 Circuit Diagram Of Smps Power Supply MAY 2 2016  MUHAMMAD KASHIF  POWER SUPPLIES What is Power Supply Power-supply is an electronic circuit that is used for the purpose of providing the electrical-power to appliances or loads such as machines computers so on. These electrical electronic appliances require various types of power at di erent ranges also with di erent characteristics. Therefore for this reason the power is converted into the recommended forms with desired qualities by using some electronic power converters or power converters. In this project we’ll show you a circuit diagram of smps power supply alongwith description. Electrical  electronic loads work with various forms of power supplies such as AC power supply High-voltage power supply AC- to-DC power supply Uninterruptable power supply UPS Programmable power supply Switch- mode power supply. What is Switch-mode-power supply It is actually the electronic power supply integrated with the switching regulator for converting the electrical power e ciently from one form to another form with desired characteristics is called as switch-mode power supply in short RC- 5 infra-red receiver for 80C32 computer Joystick converter game control adapter GCA for PCs Speed indicator for PCs Optical squelch SUBSCRIBE TO A CATEGORY Subscribe To A Speci c Category Get Noti ed Whenever There Is A New Project In Your Desired Category SUBSCRIBE VIEW ALL CIRCUIT CATEGORIES

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 3/10 smps. It is used to attain regulated DC output voltage from an unregulated AC or DC input voltage. Circuit Diagram Of Smps Power Supply Like other power supplies switch-mode power supply is a complicated circuit that supplies the power from a source to loads. Switch-mode power supply is necessary for power consuming electrical electronic appliances even for preparing electrical electronic projects. Ampli er Circuit Diagrams Audio Circuit Diagrams Calculator Measurement Circuit Diagram Softwares Clock Timer Circuit Diagrams Counter Circuit Diagrams DIY-Tutorials Electronic Keys Locks Filter Circuit Diagrams Fire Alarm Fun Game Circuit Diagrams High Voltage Circuit Diagrams Home Automation Circuit Diagrams How-to-draw-circuit-schematic- diagram LCD-LED Display

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 4/10 Topologies of Switch Mode Power Supply There are several types of topologies for SMPS among those a few are as follows DC to DC converter AC to DC converter Fly back converter Forward-converter Switch Mode Power Supply’s Working Principle Here is the working of a few types of topologies of switch mode power supply: 1. DC to DC Converter SMPS Working Principle Primarily a high-voltage DC power is directly obtained from a DC power source in a DC to DC converter. Then this hig- voltage DC-power is switched at an extremely high switching speed usually in the range of 15 KHz to 50 KHz. And then it’s fed to a step-down transformer that is comparable to the weight size of a transformer unit of 50Hz. The output of the step down transformer is then further provided to the recti er. This ltered recti ed output DC power is utilized as a source for loads a sample of this output power is used as a feedback for controlling the output voltage.The ON time of the oscillator is controlled with this feedback voltage a closed-loop regulator is formed. Lights and Display Board Circuits Metering and Instrument Circuits Motor Circuit Diagrams Power Supplies Radio – Wireless Schematic Symbols Security Saftey Signal Generators Simple Circuits Solar Circuit Diagrams Speed Controller Circuit Diagrams Telephone Related Television – TV Related Three phase circuit Diagrams Tone generator circuit

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 5/10 Circuit Diagram Of Smps Power Supply DC-DC The output of the smps is regulated by means of PWM Pulse-Width- Modulation. As given in the circuit above the switch can be driven by the PWM- oscillator such that the power delivered to the step-down transformer is controlled indirectly hence the output is controlled by the pulse-width- modulation as this pulse-width signal the output-voltage are inversely related to each other. If the duty cycle is 50 the maximum power is transported through the step- down transformer if duty cycle decreases the power transferred will also decrease by decreasing the dissipation of power. 2. Working Principle of AC to DC Converter SMPS: There is an AC input in an AC to DC converter SMPS. It is converted into DC by recti cation process using a recti er lter. This unregulated DC voltage is fed to the large- lter capacitor or Power Factor Correction PFC circuits for correction of power factor as it is a ected. This is because around voltage peaks a short current is drawn through the recti er these current pulses have appreciably high-frequency energy which causes the power factor to decrease. Diagrams UPS – Inverter – Power Generator Circuits USB Circuit Diagrams Voltage Regulators Circuit Diagrams Sensors – Tranducers Circuits

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 6/10 Circuit Diagram Of Smps Power Supply AC-DC It is somewhat similar to the above explained DC to DC converter but instead of direct DC power supply here AC input is used. So the combination of the recti er lter shown in the block diagram is used to convert the AC into DC switching is done by using a power ‘MOSFET’ ampli er with which very high gain can be obtained. This MOSFET transistor has low on-resistance can withstand  high current. The switching-frequency is chosen such that it must be placed inaudible to normal human beings mostly above 20KHz switching action is controlled by a feedback using the PWM-oscillator. The AC voltage is again fed to the output transformer. The output of this transformer is then recti ed smoothed by using the output recti er lter.In order to control the output voltage a feedback circuit is used  by comparing it with the reference voltage. 3. Fly back Converter type SMPS Working Principle

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 7/10 The switch mode power supply circuit with very low output power of less than 100W watts is commonly a type of Fly back converter SMPS it is very simple low cost circuit compared to other SMPS circuits. Hence it is used for low-power applications. Circuit Diagram Of Smps Power Supply Fly-Back Converter The unregulated input-voltage with a constant value is converted into  a required output voltage by fast switching with the help of a ‘MOSFET’ the switching frequency is around 100 kHz. The isolation of voltage can be achieved by means of a transformer. The switch operation can be controlled by means of a PWM control while implementing a practical y back converter. Fly back transformer displays di erent characteristics as compared to general transformer. The two windings of the y back transformer come into play as

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 8/10 magnetically coupled inductors. The output of this transformer is passed through a diode a capacitor for ltering recti cation. As shown in the gure the voltage across this lter capacitor is taken as the output voltage of the SMPS. 4. Forward-Converter type SMPS Working Forward-converter type SMPS is almost same as the Fly back converter type SMPS but in the forward-converter type a control is connected for controlling the switch at the output of transformer’s secondary winding the recti cation ltering circuit is complex  as compared to the y back converter. It can be called as a DC to DC buck converter alongwith a transformer used for isolation scaling. In addition to the diode D1 capacitor C a diode D2 an inductor L are interfaced at the output end. If switch S is switched ON then the input is given to the primary winding of the transformer hence a scaled- voltage is produced at transformer’s secondary winding.

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 9/10 Circuit Diagram Of Smps Power Supply Forward Converter This is how the diode D1 gets forward-biased the scaled-voltage is moved through the low pass lter preceding the loads. If the switch S is turned o then currents from the primary secondary winding reach to zero but the current through the inductive lter load can not be changed at once a path is provided to this current by the freewheeling diode D2. By means of the lter inductor the desired voltage across the diode D2 to maintain the EMF needed for maintaining the continuity of the current at inductive lter. Di erent types of topologies are there in which SMPS can be realized such as Buck converter Buck-boost converter Boost converter: Self oscillating y back converter Boost-buck Cuk Sepic. But only a few are discussed in this article namely DC to DC converter AC to DC converter Fly back converter Forward- converter.

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8/25/2017 Circuit Diagram Of Smps Power Supply http://circuit-diagramz.com/circuit-diagram-smps-power-supply/ 10/10 « Electrical Appliances Over / Under Volt Protection Circuit Diagram Circuit Diagram Of Soft Starters For Induction Motors » © 2017 Copyrights and all rights reserved by Circuit-Diagramz.com Read Electrical Appliances Over Under Volt Protection Circuit Diagram

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