Nominal line voltage: 400 VAC.
The HVPS was extensively tested with resistive loads. Figures 5 above and 6 below show generally phase-shifted primary winding currents (halved) for 100- and 50-kW operations, respectively. The oscillations after the main current surge are generated by the resonance between the leakage inductance and parasitic capacitance of the transformers. Note the absence of the “backswing” current pulse; the latter characterizes true series resonant schemes under light load.
Figure 6 π/4 phase shifted primary winding current (halved) at 100kV and 50 kW. Low line voltage: 400 VAC 14 percent.
Since a full-wave rectification scheme is used, the phase shifts between the transformer windings’ currents isπ/4. PSpice computation predicts 0.223% output voltage p-p ripple with an HVPS shock (output) capacitance of < 2 nF at the worst case of high line indicated in the Figure 7. The measured ripple is roughly four times larger and has a lower frequency fundamental component . The aforementioned simulations provide also a value of the PF of 0.943, which is close to the experimental results. Note that the ripple wave shapes are neither sawtooth nor a rectified sine wave; they are but closer to the first pattern; thus, the value for the exponent can be adopted asβ =2. This is borne out by numerous simulations and measurements in a wide range of the load impedances and output voltages. The ripple suppression by the phase shift is strongly affected by poor feedback. Taking into accounts for a very conservative voltage rating of the HV transformers and low ripple, the dynamic response of the HVPS is exceptionally fast: The rise time from zero to full output voltage is generally less than 250 μs as indicated in the Figure 10, depending on the line voltage. With fair accuracy, the dynamic characteristics in the energy-dosing mode can be analyzed. V l (t) = ft Where all the parameters and variables are reflected on the same side of the transformer; t is the time, f is the conversion frequency, and C s is the overall capacitance of the module multiplier and load. If the frequency is varied during the charge, PSpice simulations provide better accuracy. Obviously, the rise time, as derived, the output stored energy, and the ripple factors are inversely proportional to Cs. Thus, allowing for a 2 percent ripple factor at full power and full voltage, the rise time can be reduced to less than 100 μs. We note that the rise time practically does not depend on the load, since the load current is by an order of magnitude smaller than the current charging the multiplier capacitors. Order any type of Service We Provide We are the best assignment service that can satisfy student's demands in different scientific fields. We perform tasks of any kind. Our specialists provide diverse custom assignment writing services to students from all over the world every day. You can contact us for assistance with: • Essays of any type (application, scholarship, argumentative, personal, informative, persuasive, compare and contrast, narrative, analytical, cause and effect, critical, process, descriptive, expository essays); • Homework, • Assignments, • Reviews of all types (for a book, an article, or a film), • Reports, • Annotated bibliography, • Projects, • Thesis, • Term papers, • Presentations, • Lab works, • Research papers, • Speeches, • Critical thinking, • Capstone projects; • Business plan; • Coursework’s; • Dissertations. The list is far from complete! Representatives of our student assignment service are connoisseurs of the peculiarities of presentation in regards to academics. Your college a
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more