This circuit diagram shows a simple electric window/fence charger circuit that uses a 12V battery, NE555 timer IC, step-down transformer, and transistors to generate high-voltage pulses. The NE555 timer IC produces narrow pulses that drive a transistor, which in turn drives another transistor connected to the transformer. This creates high-voltage pulses from the transformer that can be used to charge electric fences or window rails. Minor modifications allow it to charge over 1km of fence. Safety precautions must be taken given the high voltages generated.
EMF EQUATION OF TRANSFORMER,TRANSFORMATION RATIO OF TRANSFORMER|DAY 3|BASIC E...Prasant Kumar
#EMF_equation_transformer
#Transformation_Ratio of transformer
#Basic electrical engineering
#Derivation of transformer emf equation
#How to calculate transformer emf equation
#Topic - ELECTRICAL TRANSFORMER
~ Link of all sessions are.
DAY 1 (Need/Definition)
https://youtu.be/BvaykFJ_NoE
DAY 2 (Working principle and Construction)
https://youtu.be/06rgxocihaM
DAY 3 (EMF equation and Turns Ratio)
https://youtu.be/g7e5xBPmv3Y
DAY 4 (Classification of Transformer)
https://youtu.be/6NP5L4MlvY4
DAY 5 ( Ideal and practical transformer on no load)
(Equivalent Transformer)
https://youtu.be/6LCLQC1p3lg
EMF EQUATION OF TRANSFORMER,TRANSFORMATION RATIO OF TRANSFORMER|DAY 3|BASIC E...Prasant Kumar
#EMF_equation_transformer
#Transformation_Ratio of transformer
#Basic electrical engineering
#Derivation of transformer emf equation
#How to calculate transformer emf equation
#Topic - ELECTRICAL TRANSFORMER
~ Link of all sessions are.
DAY 1 (Need/Definition)
https://youtu.be/BvaykFJ_NoE
DAY 2 (Working principle and Construction)
https://youtu.be/06rgxocihaM
DAY 3 (EMF equation and Turns Ratio)
https://youtu.be/g7e5xBPmv3Y
DAY 4 (Classification of Transformer)
https://youtu.be/6NP5L4MlvY4
DAY 5 ( Ideal and practical transformer on no load)
(Equivalent Transformer)
https://youtu.be/6LCLQC1p3lg
An Auto Transformer is a transformer with only one winding wound on a laminated core. An auto transformer is similar to a two winding transformer but differ in the way the primary and secondary winding are interrelated. A part of the winding is common to both primary and secondary sides.
Original Uni-junction transistor or UJT is a simple device in which a bar of N-type semiconductor material into which P-type material is diffused; somewhere along its length defining the device parameter as intrinsic standoff. The 2N2646 is the most commonly used version of UJT.
A novel single switch resonant power converterSameer Kasba
This deals with the novel single-switch resonant power converter for renewable energy generation applications. This circuit topology integrates a novel single switch resonant inverter with zero-voltage-switching (ZVS) with an energyblocking diode with zero-current-switching (ZCS).
A New Soft-Switched Resonant DC-DC ConverterIDES Editor
This paper presents a new soft-switched resonant dcdc
converter using a passive snubber circuit. The proposed
converter uses a new zero voltage and zero current switching
(ZVZCS) strategies to get ZVZCS function. Besides operating
at constant frequency, all semiconductor devices operate at
soft-switching without additional voltage and current stresses.
In order to validate the proposed converter, computer
simulations and experimental results were conducted. The
paper indicates the effective converter operation region of the
soft-switching action and its efficiency improvement results
on the basis of experimental evaluations using laboratory
prototype.
An Auto Transformer is a transformer with only one winding wound on a laminated core. An auto transformer is similar to a two winding transformer but differ in the way the primary and secondary winding are interrelated. A part of the winding is common to both primary and secondary sides.
Original Uni-junction transistor or UJT is a simple device in which a bar of N-type semiconductor material into which P-type material is diffused; somewhere along its length defining the device parameter as intrinsic standoff. The 2N2646 is the most commonly used version of UJT.
A novel single switch resonant power converterSameer Kasba
This deals with the novel single-switch resonant power converter for renewable energy generation applications. This circuit topology integrates a novel single switch resonant inverter with zero-voltage-switching (ZVS) with an energyblocking diode with zero-current-switching (ZCS).
A New Soft-Switched Resonant DC-DC ConverterIDES Editor
This paper presents a new soft-switched resonant dcdc
converter using a passive snubber circuit. The proposed
converter uses a new zero voltage and zero current switching
(ZVZCS) strategies to get ZVZCS function. Besides operating
at constant frequency, all semiconductor devices operate at
soft-switching without additional voltage and current stresses.
In order to validate the proposed converter, computer
simulations and experimental results were conducted. The
paper indicates the effective converter operation region of the
soft-switching action and its efficiency improvement results
on the basis of experimental evaluations using laboratory
prototype.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
A New Active Snubber Circuit for PFC ConverterIDES Editor
In this paper, a new active snubber circuit is
developed for PFC converter. This active snubber circuit
provides zero voltage transition (ZVT) turn on and zero
current transition (ZCT) turn off for the main switch
without any extra current or voltage stresses. Auxiliary
switch turns on and off with zero current switching (ZCS)
without voltage stress. Although there is a current stress
on the auxiliary switch, it is decreased by diverting it to
the output side with coupling inductance. The proposed
PFC converter controls output current and voltage in
very wide line and load range. This PFC converter has
simple structure, low cost and ease of control as well. In
this study, a detailed steady state analysis of the new
converter is presented, and the theoretical analysis is
verified exactly by 100 kHz and 300 W prototype. This
prototype has 98% total efficiency and 0.99 power factor
with sinusoidal current shape.
Transformers devices and its efficiency of itnsp945
Transformers Electrical Engineering
Types of Transformers
The efficiency of various Transformers
In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil.
Light Triggering Thyristor for HVDC and other ApplicationsIDES Editor
High-power thyristors with direct light –triggering
and integrated protection functions can be utilized
advantageously for applications in which several thyristors are
connected in series. This applies in particular to High-Voltage
DC (HVDC) transmission, Static Var Compensation (SVC),
converters for medium voltage drives, and also to certain pulse
power applications. Recent progress in both device innovations
and optimization of some application systems is reviewed in
this article.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
1. circuit
ideas
ELECTRIC WINDOW/FENCE CHARGER
T.K. HAREENDRAN
tors R2 and R3, preset VR1 and capaci-
edi
tor C3. The amplitude of the output s.c. dwiv
H
ere is the circuit of a simple pulse can be varied to some extent by
electric window charger. adjusting variable resistor VR1. You
With a couple of minor circuit can vary the frequency from 100 Hz
variations, it can be used as an electric to 150 Hz. drives pnp transistor T1 into conduc-
fence charger too. A standard 12V, 7Ah X1 is a small, iron-core, step-down tion for the duration of the time period.
sealed maintenance-free (SMF) UPS transformer (230V AC primary to 12V, The collector of T1 is connected to the
battery is required for powering the 1A secondary) that must be reverse base of driver transistor T2 through re-
entire unit. connected, i.e., the secondary winding sistor R5. When transistor T1 conducts,
Any component layout and mount- terminals of the transformer should T2 also conducts. When T2 conducts, a
ing plan can be used. However, be connected between the emitter and high-current pulse flows through the
try to keep the output terminals of ground and the output taken across the secondary winding of transformer X1
transformer X1 away from the circuit primary winding. Switch S1 is used for to generate a very high-voltage pulse
board. Timer NE555 (IC1) is wired as power ‘on’/‘off’ and LED1 works as a at the primary winding.
a free-running oscillator with narrow power-‘on’ indicator. LED2 is used to This dangerously high voltage
negative pulse at the output pin 3. The indicate the pulse activity. can be used to charge the window
pulse frequency is determined by resis- The output pulse from pin 3 of IC1 rails/fences. Ordinary silicon diode
D1 (1N4001) protects
T2 against high-voltage
peaks generated by X1
inductance during the
switching time.
You can replace
X1 with another trans-
former rating, and, if
necessary, replace T2
with another higher-
capacity transistor. The
circuit can be used to
charge a 1km fence
with some minor mod-
ifications in the output
section.
Caution. Take all
the relevant electri-
cal safety precautions
when assembling, test-
ing and using this high-
voltage generator.
1 1 0 • S e p t e m b e r 2 0 0 8 • e l e c t ro n i c s f o r yo u w w w. e f y m ag . co m