What is the overall capacitance of C2 and its voltage tolerance? Thanks Giyora. The capacitor was around 11nF, 25kV made by connecting lots of smaller ones together. We have large pulse capacitors available in our shop. Just a message to say the new site looks great and as always the DIY information is superb. I fully recomend the products on sale, they work a treat. All the best of stuff. The circuits seem to be based on the premise that the additional circuits would add additional current to the load after the limit has been met by the original controlling entity such as an LM This resistor has a value of 10 times another resistor that is positioned in series with the input of the LM The second resistor is in series with the input to the LM in front of the connection to the larger resistor and the TIP base.
The emitter of the TIP is connected to the input to the LM in front of the smaller value series resistor. I need to increase the current to the load in the same manner as the previously described situation; except for one major difference. As you stated in your previous answer, the required result could be reached if it was a pulsed system using capacitor s as a voltage storage source — which is what I want to do.
I know that your pulse generator deals with large amounts of current, while my system is exacly the opposite; but any info you can send my way about safely charging these capacitors when the high voltage source, i. The two parallel capacitors are uF vdc units; and any info you can send my way will be greatly appreciated.
Thanks in advance, Richard. If your power source is limited to 50mA then there is no way to get more than this in a linear way. If you are drawing power from the supply in pulses, then a large parallel capacitor might help with peak current as it will charge between pulses.
The average current though will be the same. The other alternative would be to look into using a buck converter. Hi Richard, I think this is the proper section pertinent to my question, so here goes. What do you think, can you help me with this, and thanks for any help you can give me. Just make sure it is rated for enough current and voltage. If the flyback has output diodes, then you wont need to add more.
Also can I use flyback transformer s instead of ignition coil s , if so would it eliminate the need for the diodes because the flyback has a built in one? Thanks for your help and for everything you do, you are much appreciated. Can you give some more details about the smoothing capacitor — would a 30kV 1nF cap be enough?
Hello out there! I feel like I have been living in another world somewhere else for the last 53 years. GREAT stuff here! Can you or anyone else break down a schematic I found on another site that shows how to build a wide band fuel injector monitor? Or does some one out there have one to place on this site? I am looking for a diy high voltage generator based on capacitors circuit design — to be used as an insect killer?
D3 is another HV diode. There is nothing particularly special about it. It just needs to be rated for the expected voltage and current. Type your message here What is the Voltage rating of D3 Is this a special diode?
Thanks for bearing with my query Regards Ralph. RC1 used was also 10k resistor and 0. The computer PSU would need to be able to deliver at least 5A for each ignition coil.
One more question though. What were your snubber values? Yes, the metal object placed inside the work coil of an induction heater acts like the short circuited secondary coil of a transformer. D2 is made from four 30kV 1A diodes. If you meant you have a 40kV 1A bridge, then yes, this would be fine. You will be very satisfyed with the number of visitors that will come to your site if you give any plans how to build the induction heater so please hurry and you wont be dissapointed.
You need a high power, high frequency pulse circuit similar to this Power Pulse Controller. You would use it to switch a higher voltage source V for example through the induction coil with a parallel tank capacitor and probably an impedance matching transformer. The frequency would need to be in the RF Radio Frequency range. Can you give me any tips how to build an induction heater from your experience? Thanks for replying. Can we use this RF generator to produce a induction heating device?
Is there any modifications to the circuit component values, frequency? It could, but its not ideal. The Pulse Contoller would be best. The google ads aound this page and the other pages about High Voltage should have some links to suppliers of HV diodes. Additionally, the duration of V o is t o seconds and the duration of V 1 is t 1 second which is about twice as long as t o.
As illustrated by signal FIG. Of course, these areas A o , A 1 can be different in other configurations of the preferred embodiment as understood by those of ordinary skill in this art. Returning to FIG. The modulated bipolar signal s may be similar to one or more of the modulated bipolar signal s , , and of FIG. Because the amplitude of V 4 FIG. The frequency spectrum of the modulated bipolar signals contains very little or does not contain a direct current DC component.
Additionally, as shown in FIG. The signal from the bipolar driver may or may not have time delays between half-cycles as shown in FIG. For example, signals and have time dealys while signals and do not. The gaps between cycles may be necessary for proper operation of some types of NLTLs. They are required to set the initial condition of nonlinear materials for example, initial magnetization of ferrites. The array of NLTLs , , and modulates each cycle of the bipolar pump pulse with oscillating signals to create dampened oscillating bipolar pulses similar to example outputs , , and Based on these oscillating signals, energy transferred to antenna array or sub-array contains the high frequency component associated with the oscillating bipolar signals produced by the NLTL modulators , and and middle frequency components associated with the drive bipolar pulse.
The resulting pulses , , and do not contain a direct current dc component or very low frequency components that were unwanted e. In contrast to the prior art, the energy of the pump signal which is not converted into high frequency range by NLTL modulators , and is not lost but can be used together with the main frequency produced by NLTL modulators , and In contrast to prior art pulse generators, the resulting energy efficiency of the preferred embodiment configured as a dual multi -band structure is very high.
As previously mentioned, FIGS. In the spectrum of the signal generated by the preferred embodiment configured as the system of FIG. However, instead of high energy dc and low-frequency components of the prior art system , there is an additional high energy middle frequency component that could be used as an operational frequency simultaneously with a high-frequency component This dual frequency bands operation can be important for various applications.
For instance, new high power microwave HPM electronic warfare EW weapon systems could knock out multiple targets and different frequencies with a single unit half the cost and space taken. Furthermore, higher energy on the target in a short period of time due to multicycle operation could allow the HPM system to knock out targets that are farther away from the EW weapon system.
This system use one NLTL to generate an output consisting of a trainal of oscillating bipolar signals that are sequentially positive and negative while dc and very low frequencies components are almost absent in the spectrum. The diplexer separates different frequency bands present in the signal coming out of NLTL and directs them towards two different output ports.
These output ports are connected to antennas optimized for a specific operational frequency band. Furthermore, the waveform generated by the bipolar driver may or may not have time delays between individual half-cycles depending on what components are used to implement the system A bipolar driver generates a multi-cycle similar to the multi-cycle waveforms discussed earlier and inputs them into a NLTL In this system , a waveform output at the output of the NLTL contains different frequency components associated with different widths of the bipolar driver signal and RF modulation produced by the NLTL Of course, those of ordinary skill in the art will realize that any number of differing pulse widths can be generate and that time delays may not exist between cycles depending on how the system is implemented.
To separate these frequency components bands between antennas optimized for each particular frequency range, a multiplexer can be used instead of a diplexer that was illustrated in FIG.
The outputs of multiplexer can be connected to specific antennas - 1 , - 2. Method may be better appreciated with reference to flow diagrams. Moreover, less than all the illustrated blocks may be required to implement an example methodology.
Blocks may be combined or separated into multiple components. The method of generating a high power pulse begins by generating a bipolar waveform, at The method modulates the bipolar waveform, at , with an oscillating signal to create a modulated signal.
The spectrum of the modulated signal contains very little to no dc components. The modulated signal is sent to at least one antenna, at In the foregoing description, certain terms have been used for brevity, clearness, and understanding.
No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed.
Therefore, the invention is not limited to the specific details, the representative embodiments, and illustrative examples shown and described. Thus, this application is intended to embrace alterations, modifications, and variations that fall within the scope of the appended claims.
Moreover, the description and illustration of the invention is an example and the invention is not limited to the exact details shown or described. A pulse generator of radio frequency or microwave signals comprising: a generator to generate a bipolar signal; and.
The pulse generator of claim 1 wherein generator is configured to generate the bipolar signal that is a one cycle bipolar signal that stays at zero volts for a time period of T 1 , then goes from zero volts to a positive polarity for a time period of T 2 , then returns to zero volts for a timer period of T 1 , then goes to a negative polarity for a time period of T 2 , and then returns to zero volts for a time period of T 1. The pulse generator of claim 1 wherein the generator is configured to generate the bipolar signal that includes two or more of the one cycle bipolar signals generated sequentially without a time delay between the two or more of the one cycle bipolar signals.
The pulse generator of claim 1 wherein the modulator is configured to generate a modulated bipolar signal that has a frequency spectrum with a primary frequency band and a second frequency band above a threshold, with other frequencies below the threshold. The pulse generator of claim 1 wherein the modulator unit further comprises: a non-linear transmission line NLTL to modulate the bipolar signal with oscillating signals to generate the modulated bipolar signal.
The pulse generator of claim 1 further comprising: an antenna to transmit the modulated bipolar signal. The pulse generator of claim 1 further comprising: a first antenna to operate at a first bandwidth;.
The pulse generator of claim 1 further comprising: a plurality of antennas to operate at a plurality bandwidths;. A method of generating high power pulse comprising: generating a bipolar signal;. The method of claim 9 wherein the modulating further comprises: routing the bipolar signal to a first NLTL, wherein the first NLTL produces the modulated signal that is a first modulated signal;.
The method of claim 9 wherein the modulating further comprises: passing the bipolar signal through a NLTL to generate the modulated bipolar signal. The method of claim 9 wherein the generating further comprises: generating the bipolar signal that is a one cycle bipolar signal that stays at zero volts for a time period of T 1 , then goes from zero volts to a positive amplitude for a time period of T 2 , then returns to zero volts for a timer period of T 1 , then goes to a negative amplitude for a time period of T 2 , and then returns to zero volts for a time period of T 1.
The method of claim 11 wherein generating further comprises: generating the bipolar signal so that the bipolar signal includes two or more of the one cycle bipolar signals generated sequentially.
The method of claim 9 wherein the generating further comprises: generating the bipolar signal that is a one cycle bipolar signal that goes to generally a positive voltage of V for a time period of T and then goes to a generally negative voltage of V for a time period of T.
The method of claim 14 wherein generating further comprises: generating the bipolar signal so that the bipolar signal includes two or more of the one cycle bipolar signals generated sequentially without a time delay between the two or more of the one cycle bipolar signals. A high power pulse system comprising: a generator to generate a bipolar signal;.
The frequency spectrum of the modulated bipolar signals contains very little or does not contain a direct current DC component. Additionally, as shown in FIG.
The signal from the bipolar driver may or may not have time delays between half-cycles as shown in FIG. For example, signals and have time dealys while signals and do not. The gaps between cycles may be necessary for proper operation of some types of NLTLs. They are required to set the initial condition of nonlinear materials for example, initial magnetization of ferrites. The array of NLTLs , , and modulates each cycle of the bipolar pump pulse with oscillating signals to create dampened oscillating bipolar pulses similar to example outputs , , and Based on these oscillating signals, energy transferred to antenna array or sub-array contains the high frequency component associated with the oscillating bipolar signals produced by the NLTL modulators , and and middle frequency components associated with the drive bipolar pulse.
The resulting pulses , , and do not contain a direct current dc component or very low frequency components that were unwanted e. In contrast to the prior art, the energy of the pump signal which is not converted into high frequency range by NLTL modulators , and is not lost but can be used together with the main frequency produced by NLTL modulators , and In contrast to prior art pulse generators, the resulting energy efficiency of the preferred embodiment configured as a dual multi -band structure is very high.
As previously mentioned, FIGS. In the spectrum of the signal generated by the preferred embodiment configured as the system of FIG.
However, instead of high energy dc and low-frequency components of the prior art system , there is an additional high energy middle frequency component that could be used as an operational frequency simultaneously with a high-frequency component This dual frequency bands operation can be important for various applications.
For instance, new high power microwave HPM electronic warfare EW weapon systems could knock out multiple targets and different frequencies with a single unit half the cost and space taken. Furthermore, higher energy on the target in a short period of time due to multicycle operation could allow the HPM system to knock out targets that are farther away from the EW weapon system.
This system use one NLTL to generate an output consisting of a trainal of oscillating bipolar signals that are sequentially positive and negative while dc and very low frequencies components are almost absent in the spectrum.
The diplexer separates different frequency bands present in the signal coming out of NLTL and directs them towards two different output ports. These output ports are connected to antennas optimized for a specific operational frequency band.
Furthermore, the waveform generated by the bipolar driver may or may not have time delays between individual half-cycles depending on what components are used to implement the system A bipolar driver generates a multi-cycle similar to the multi-cycle waveforms discussed earlier and inputs them into a NLTL In this system , a waveform output at the output of the NLTL contains different frequency components associated with different widths of the bipolar driver signal and RF modulation produced by the NLTL Of course, those of ordinary skill in the art will realize that any number of differing pulse widths can be generate and that time delays may not exist between cycles depending on how the system is implemented.
To separate these frequency components bands between antennas optimized for each particular frequency range, a multiplexer can be used instead of a diplexer that was illustrated in FIG. The outputs of multiplexer can be connected to specific antennas - 1 , - 2. Method may be better appreciated with reference to flow diagrams.
Moreover, less than all the illustrated blocks may be required to implement an example methodology. Blocks may be combined or separated into multiple components. The method of generating a high power pulse begins by generating a bipolar waveform, at The method modulates the bipolar waveform, at , with an oscillating signal to create a modulated signal.
The spectrum of the modulated signal contains very little to no dc components. The modulated signal is sent to at least one antenna, at In the foregoing description, certain terms have been used for brevity, clearness, and understanding.
No unnecessary limitations are to be implied therefrom beyond the requirement of the prior art because such terms are used for descriptive purposes and are intended to be broadly construed. Therefore, the invention is not limited to the specific details, the representative embodiments, and illustrative examples shown and described.
Thus, this application is intended to embrace alterations, modifications, and variations that fall within the scope of the appended claims.
Moreover, the description and illustration of the invention is an example and the invention is not limited to the exact details shown or described. All rights reserved. Login Sign up. Search Expert Search Quick Search. High power pulse generator. United States Patent A systems, pulse generators, apparatus and methods for generating a high power signal are presented.
A pulse generator includes a generator and a modulator unit. The modulator unit modulates the bipolar signal with oscillating signals to generate a modulated bipolar signal with oscillating portions. The frequency spectrum of the modulated bipolar signal contains very little to no direct current DC component. London, Simon Y. Click for automatic bibliography generation.
Nashua, NH, US. Download PDF What is claimed is: 1. A pulse generator of radio frequency or microwave signals comprising: a generator to generate a bipolar signal; and a modulator unit to modulate the bipolar signal with an oscillating signal to generate a modulated bipolar signal with oscillating portions, wherein the frequency spectrum of the modulated bipolar signal does not contain a direct current DC component; a first antenna to operate at a first bandwidth; a second antenna to operate at a second bandwidth; and a diplexer to transmit modulated bipolar signals that are to operate in the first bandwidth to the first antenna and to transmit modulated bipolar signals that are to operate in the second bandwidth to the second antenna.
The pulse generator of claim 1 wherein generator is configured to generate the bipolar signal that is a one cycle bipolar signal that stays at zero volts for a time period of T 1 , then goes from zero volts to a positive polarity for a time period of T 2 , then returns to zero volts for a timer period of T 1 , then goes to a negative polarity for a time period of T 2 , and then returns to zero volts for a time period of T 1.
The pulse generator of claim 2 wherein the generator is configured to generate the bipolar signal that includes two or more of the one cycle bipolar signals generated sequentially without a time delay between the two or more of the one cycle bipolar signals. A pulse generator of radio frequency or microwave signals comprising: a generator to generate a bipolar signal; and a modulator unit to modulate the bipolar signal with an oscillating signal to generate a modulated bipolar signal with oscillating portions, wherein the frequency spectrum of the modulated bipolar signal does not contain a direct current DC component, wherein the modulator is configured to generate a modulated bipolar signal that has a frequency spectrum with a primary frequency band and a second frequency band above a threshold, with other frequencies below the threshold.
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