The current doubler is a particularly useful rectifier configuration for. It is widespread to examine and explain the functioning of the standard current doubler rectifier as strictly symmetrical according to the electrical current through the two inductances. The secondary windings of two transformers work in parallel when the equivalent duty cycle is smaller than 0. The current doubler rectifier circuit is compared with the fullbridge rectifier circuit. It is composed, important properties of the current doubler rectifier as revealed by the circuit diagram, the description of, 2 current doubler rectifier provides an alternative. Analysis of new bidirectional dcdc converter based on. In high current capability and high stepdown voltage conversion, a phaseshift fullbridge converter with a conventional current doubler rectifier has the common limitations of extremely low duty ratio and high.
This paper presents comparison between phaseshift fullbridge converters with noncoupled and coupled current doubler rectifier. Thus, it is possible to get 200 vdc from a 100 vpeak ac source using a doubler, 400 vdc from a quadrupler. Thus, fb seems to be more feasible solution for the input side. When the current flows in a clockwise direction, the rectifier r1 will charge the capacitor c1 till the voltage reaches the peak of the positive voltage wave. Power mosfets application note 833 switching analysis of. During the positive cycle of vs, point a is positive with respect to b causing diode d1 and d2 to forward bias and d3 and d4 to get reversed biased. The output of current doubler 40 is then filtered by a capacitor 48 acting as a low pass filter and output as the dc output of the rectifying circuit 10. It is proved that by the equations above that the total current ripple waveforms and load step response are identical in both the center trapped rectifier and the current doubler rectifier which are shown in fig. Research article comparison between phaseshift fullbridge converters with noncoupled and coupled currentdoubler rectifier chengtaotsai, 1 jyechausu, 2 andshengyutseng 3 department of electrical engineering, national chinyi university of technology, taichung, taiwan. Current doubler rectifier for high power and low voltage. The voltage multiplier is an electronic circuit that converts the low ac voltage into high dc voltage. The converter operated in dcm remains the performances of the converter in ccm. An improved currentdoubler rectifier for the marine controlled. The voltage multiplier, however, is a special type of diode rectifier circuit which can potentially produce an output voltage many times greater than of the applied input voltage.
The circuit for the phaseshift converter with the current doubler was simulated using pspice software. It recovers the oscillation energy to the load through an inductor. An active snubber circuit has been proposed for a currentdoubler topology in 17. Pdf improved current doubler rectifier researchgate. An alternative rectification technique for pushpull and bridge converters by laszlo balogh this design note describes an alternative rectification method which offers simpler structure and better utilization of the isolation transformers in. Comparison between phaseshift fullbridge converters with. Some loads require high currents, others high volta ges, and others both high current and high voltage. The analysis and design guidelines for a twophase interleaved phaseshift fullbridge converter with transformer winding seriesparallel autoregulated current doubler rectifier are presented in this paper. This paper presents comparison between phaseshift fullbridge converters with noncoupled and coupled currentdoubler rectifier. Phaseshift dcdc converter with a current doubler rectifier the current doubler recti. Any load in a practical circuit will lower these voltages. In other embodiments, the current doublers are connected in parallel. Voltage doubler basics online lecture slides for lesson 14181 cleveland institute of electronics.
Analysis and implementation of fullbridge converter with. An alternative rectification technique for pushpull and bridge converters by laszlo balogh this design note describes an alternative rectification method which offers simpler structure and better utilization of the isolation transformers in pushpull, halfbridge and bridge power stages. This makes the converter achieve zvs for the switches in a wide load range with the use of the energy stored in the. A rectifying circuit comprising first and second current doublers is disclosed. Alternatively, thyristors t 3 and t 4 must be fired simultaneously during the negative half wave of the source voltage. Current doubler, currentdoubler rectifier or hybridge 1 a topology used in switchedmode power supplies smps for fullwave rectification of an alternating current.
A series of products for voltage doubler rectifier doubler rectifier and smoothing types, minutes, c. To increase the converter efficiency at the transformer secondary side, a current. Pdf it is widely accepted to examine and explain the functioning of the standard current doubler rectifier as strictly symmetrical according. Dc converter with a current doubler rectifier was proposed using clarified circuit operation and features. The compared advantages of the current doubler rectifier to the voltage doubler rectifier for dctodc converters are known 1. Us7880577b1 current doubler rectifier with current.
This results in the current to flow from a, through. A new currentdoubler rectifier based on threestate switching cell for buck derived dcdc converters. It is widely accepted to examine and explain the functioning of the standard current doubler rectifier as strictly symmetrical according to the electrical current through the two inductances. A new synchronized switching harvesting scheme employing. It is composed, important properties of the currentdoubler rectifier as revealed by the circuit diagram, the description of, 2 currentdoubler rectifier provides an alternative. The output tracks the input during positive half cycle. However, the currentdoubler rectier circuit uses more than one output. A ripple reduction circuit for use in a current doubler rectifier has first and second inductors coupled via a first coupling coefficient. The present work challenges this consideration and proposes a new version of the electrical circuit diagram where the current symmetry is improved. Modelling of a resonant converter with a synchronous current doubler rectifier for dc magnet power supplies. Meanwhile, two diodes in the bridge rectifier are replaced by switch s 1 and s 2, thus reducing the energy. In high current capability and high stepdown voltage conversion, a phaseshift fullbridge converter with a conventional current doubler rectifier has the common limitations of extremely low duty ratio and high component stresses. In the first negative halfcycle of the input wave, the diode d1 is directly polarized and allows the current to pass through the capacitor c1. In some embodiments, the first and second current doublers are connected in series.
Pdf modelling of a resonant converter with a synchronous. Pdf this paper presents a new currentdoubler rectifier for application on buck derived dcdc converters, such as, pushpull, halfbridge. Phaseshift pwmcontrolled dcdc converter with secondary. However, the currentdoubler rectifier circuit uses more than one output filter inductor, and the structure is slightly complicated. The circuit uses four diodes d1, d2, d3 and d4 connected in the form of bridge. Pdf it is widespread to examine and explain the functioning of the standard current doubler rectifier as strictly symmetrical according to the. Although it is usual in electronic circuits to use a voltage transformer to increase a voltage, sometimes a suitable stepup transformer or a specially insulated. The capacitor is charged to the peak value of the input voltage. A third inductor is coupled to the first and second inductors. An improved currentdoubler rectifier for the marine. In the adopted dcdc converter, a fullbridge inverter with phaseshift pwm technique is used to achieve zero voltage switching for active power switches and to regulate the output voltage.
Us5933338a dual coupled current doubler rectification. A voltage multiplier is a specialized rectifier circuit producing an output which is theoretically an integer times the ac peak input, for example, 2, 3, or 4 times the ac peak input. Current doubler, current doubler rectifier or hybridge 1 a topology used in switchedmode power supplies smps for fullwave rectification of an alternating current. On figure 6 this occurs at tt2 and the value of vo at that time is vl vh ett21rc 1. The current doubler rectifier cdr converter topology was invented and described in the early 1950s which can offer the unique characteristic of halving the output voltage while doubling the output current compared to a standard rectifier. The operation principle and the external characteristics in discontinuing current mode dcm are discussed for zvs pwm fullbridge converter with current doubler rectifier cdr zvs pwm fb converter. Voltage multipliers doublers, triplers, quadruplers, and. The proposed sshicdr interface relies on the combination of the series sshi interface and the current doubler rectifier circuit. Low voltage high current power conversion with integrated. Voltage doubler circuit the source signal vs is a sinusoid with amplitude 5 volts as shown on figure 14. The currentdoubler rectifier circuit is compared with the fullbridge rectifier circuit.
The voltage and current waveforms of the fully controlled bridge rectifier for a resistive load are illustrated in fig. In a half wave rectifier, the load current flows for what part of the cycle. The goal of this work is toanalyzing the advantage and disadvantage between center trapped rectifier and current doubler rectifier and find out the more conformable one for high current applications. The current doubler rectifier doubles the input current as needed for a few vital applications. Current doubler rectifier offers ripple current cancellation. Design of phase shifted fullbridge converter with current doubler. Furthermore the current doubler rectifier gives advantages when the current ripple is low. Us7880577b1 current doubler rectifier with current ripple. However, the current doubler rectifier circuit uses more than one output filter inductor, and the structure is slightly complicated. The half wave voltage doubler consists of two diodes d1 and d2 and two capacitors c1 and c2. The current doubler rectifier can be derived from the fullwave rectifier circuit using a simple conversion of the different current and voltage sources of the circuit. A new current doubler rectifier based on threestate switching cell for buck derived dcdc converters.
The voltage multiplier is an electronic circuit that delivers the output voltage whose amplitude peak value is two, three, or more times greater than the amplitude peak value of the input voltage. At, switch is turned off and ac magnetizing current is commutated from switch to capacitance. In voltage doubler circuit the alternating current will first flow in a clockwise pattern and then in anti clockwise indicated by arrows in the diagram. In general, three basic topologies are suitable for output side.
In the proposed rectifier, two extra inductors are introduced to extend the duty ratio of the switches, which in turn reduces the peak current through the isolation transformer as well as the output current ripple. Design of phase shifted fullbridge converter with current. Dcm analysis of zvs pwm fullbridge converter with current. Voltage doubler circuit by replacing two diodes of the full wave rectifier with capacitors the resulting circuit is shown on figure. Phaseshifted fullbridge converter and current doubler application note document number. There design of an efficient secondaryside circuit is. Current doubler rectifier offers ripple current cancellation pdf. A resonant inductor and two clamping diodes are added in the phase shift full bridge direct current to direct current dc. Multiple choice questions ae on rectifiers and filters. Pdf a new currentdoubler rectifier based on threestate. Current doublers have been widely adopted in highcurrent dcdc converters for their reduced conduction losses. As a result, the with the currentdoubler rectifier is shown in fig. However, the current doubler rectier circuit uses more than one output. Voltage multiplier voltage doubler, voltage tripler.
Forwardflyback converter with currentdoubler rectifier. In a full wave rectifier, the current in each diode flows for a. In high current capability and high stepdown voltage conversion, a phaseshift fullbridge converter with a conventional currentdoubler rectifier has the common limitations of extremely low duty ratio and high component stresses. Current doubler rectifier offers ripple current cancellation steve mappus system power abstract the current doubler rectifier is a popular alternate choice for the output stage of a buck derived power converter, which would otherwise use a conventional centertapped transformer with secondaryside, fullwave rectification. Thyristors t 1 and t 2 must be fired on simultaneously during the positive half wave of the source voltage v s, to allow the conduction of current. Research article comparison between phaseshift full. Optimization of a 5kw telecom phaseshift dcdc converter. When the positive cycle of ac approaches the circuit the top of the secondary winding of the transformer is positive while the bottom of the secondary winding is negative. Technique for push pull and bridge converters by laszlo balogh.
The present work challenges this consideration and proposes a new version of the electrical circuit daigram where the current symmetry is improved. During interval, capacitance is almost linearly discharged from voltage to input voltage by the ac magnetizing current, which can be approximated as. A zero voltage switching dcdc converter is presented, which gives a stable output voltage and high circuit efficiency. The first and second inductors generate a first and a second ripple current, respectively. Visintini elettra synchrotron light laboratory, trieste, italy abstract in particle accelerators, rectifiers are u sed to convert the ac voltage into dc or lowfrequency ac to supply loads like magnets or klystrons. The converter circuit is verified using the theory of operation, details of design, and various experimental results. Use of cdr offers many advantages in comparison with fb and centre. Current doubler rectifier for high power and low voltage dc. Moreover, the overall circuit performance is discussed.
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