Hv power supply schematic
Pass Tubes, Error Amp, Regulator tubes, top-to-bottom. See attached. In this form, it looks much simpler and lots easier at least to my old eyes. If anybody wants to tinker with the schematic, I can post it here or send via PM.
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The Variable High Voltage Power Supply 0-300V
However, it is quite difficult for space power supplies to directly achieve high-voltage output from the bus, because of the harshness of the space environment and the performance limitations of existing aerospace-grade electronic components. This paper proposes a high-voltage power supply module design for space welding applications, which outputs 1 kV and W when the input is V. This paper also improves the efficiency of the high-voltage converter with a phase-shifted full-bridge series resonant circuit, then simulates the optimized power module and the electric field distribution of the high-voltage circuit board.
In recent years, with the rapid development of aerospace and power electronics technology, high-efficiency, high-voltage and high-power DC power supplies are required in space applications Novac et al. For electric propulsion, high-voltage is required by the electric thruster to generate an electric or electromagnetic field to accelerate the flux of the pre-ionized propellant, which can range from several hundred V to several kV, depending on the particular type of electric thruster used Reese et al.
For examples, satellite electric thrusters require voltages ranging from V to 1. Nowadays, as the application scenarios of electric propulsion devices become more complicated, high-voltage and high power density have become one of main development directions.
Therefore, high-power power processing unit PPU has become a focus of development. For space welding, a major difficulty is to achieve high-power, high-voltage power supply. The performance of the power supply used for electron acceleration directly affects the welding quality. For space solar power station, as an ultra-high-power space system, they require the transmission of electricity over hundreds of kilometers Xin-bin and Li, ; Zaitsev et al.
In order to minimize losses, high-voltage transmission is required. The space high-voltage power supplies have become a key technology for high-voltage transmission. Limited by the withstand voltage and capacity of space-grade capacitors, the withstand voltage, the maximum surge current, and the maximum forward current of power diodes, the traditional solution is secondary windings in series with a high boost ratio transformer to achieve space high-voltage power supply, which avoids a large number of high-voltage rectifiers usage, and can be simply controlled.
So this kind of power supply is considered low reliability. It is difficult for high-voltage power supplies to maintain reliability in space environment. Power supply module can solve this problem. The paper Reese et al. Through the flexible combination of anode power supply modules, the ASM Array can be used for different scenarios of space high-voltage applications.
Paper Wang et al. With this new structure, power system of high conversion ratio, low power loss, high power conversion ratio and density is achieved. For space welding, acceleration power supplies are often required with an output of 10 kV, 2 kW even more. This type of space power supply is difficult to realize, so a design solution can be considered through IPOS connection of power supply modules.
This paper proposes a new power system structure for space welding to achieve a 10 kV, 2 kW output, as shown in Figure 1. The flexible combination of power supply modules for different space high-voltage applications is a well approach to solve the design problems of space high-voltage power supplies. Power supply modules can solve the problems in performance limitations of aerospace-grade devices in space high-voltage applications, and make it easier to carry out insulation protection.
Therefore, space power module is very important in space high-voltage systems. This paper proposes a space high-voltage power module with high boost ratio and a new improvement module to improve the efficiency. This paper proposes the preliminary design of the space high-voltage power module as shown in Figure 2A. The power inverter uses a full-bridge circuit, which can be used for high-power applications and improve the utilization of the transformer.
The circuit employs a full-wave voltage doubler rectifier. Figures 2B,C depict the working state of this power supply. Figure 2. Preliminary design of space high-voltage power module topology and its operating modes. A Space high-voltage power module topology. B The first half-period. C The second half-period. At the first half-period: Switches Q 1 and Q 4 are turned on, Q 2 and Q 3 are turned off, and the rectifier circuit outputs approximately 8 times the voltage of the secondary winding Vin?
This design solves the problems of space high-voltage power supply, including high turn ratio transformers, secondary-side multi-windings in series with excessive stress and the power insulation. The maximum withstand voltage on the rectifier components diodes and capacitors of the rectifier is twice as the voltage of the transformer secondary windings. By reducing the turn ratio of the transformer and rectifying the output high-voltage through the voltage doubler rectifier, the voltage of the high-voltage transformer and the key rectifier components diodes and capacitors can be reduced, which improves the system reliability.
Finally, the high-voltage power supply can be flexibly combined through IPOS to achieve voltage control and margin design. The secondary side of the space high-voltage power module is full-wave eight-times voltage rectifier as shown in Figure 2A.
It is equivalent to the input-parallel-output-series connection of two half-wave four-times rectifier shown in Figure 3. For an ideal half-wave rectifier, the input voltage is shown in Figure 4. The output voltage of half-wave four-times voltage rectifier is approximately equal to 4 V in. We define four transfer functions of the two-port network:. As the input voltage is alternating between positive and negative, it can be regarded as discontinuous in time.
This full-bridge half-wave rectifier is analyzed by the discrete system method. Firstly, by transforming the classical state space equations into discrete domain state space equations through z -transformation, the following state space equations are obtained:. Assuming that all rectifier units are ideal, that is, the on-resistance of the diode is 0, there is no on-voltage drop, the reverse cut-off voltage is large enough.
The three vectors are expressed as follows:. By z -transformed on the discrete state space equations of Eq. An equivalent transformation of Eq.
Meanwhile, Eq. By calculating the coefficients of the four matrices, a complete transfer function of a half-wave voltage doubler rectifier can be obtained, and by connecting two identical systems with the inputs in parallel and outputs in series, an expression for a full-wave eight-times rectifier can be obtained.
Figure 6. Starting from kT , the polarity of the input voltage is in Figure 4. We can derive the output voltages of capacitors C 2 , and C 4. Since it is assumed that diodes are ideal in the topology of this circuit, capacitors C 1 and C 2 , capacitors C 3 and C 4 are instantaneously connected in parallel, respectively.
We can derive the two output capacitor voltages. Since the diode is assumed as an ideal device, at this moment the capacitors C 2 and C 3 are instantaneously connected in parallel, and their voltages are equal at both ends according to KVL and conservation of capacitive charge.
From the Eqs 21 and 22 , we can derive that at the end of T 2 , the voltage across capacitors C 2 and C 4 are calculated as:. Bringing Eqs 22 and 23 into Eqs 12 and 13 , we can derive an expression for the voltages of capacitors C 2 and C 4 in the first switching mode. Separating the small signal variables of the entire circuit from the above equation, a set of equations can be listed as follows:. Similarly, the expressions of other transfer function parameter matrices can be derived.
The system transfer function is calculated by MATLAB, there is an output impedance zero pole diagram for a full-wave eight-times rectifier as shown in Figure 7A , an output impedance bode diagram as shown in Figure 7B , a voltage gain zero pole diagram for a full-wave eight-times rectifier as shown in Figure 7C and a voltage gain bode diagram as shown in Figure 7D.
For discrete systems, the system is stable because the poles of the voltage gain transfer function and the impedance gain transfer function are all in the unit circle in the z -plane. Figure 7. Small signal model simulation diagram.
A Zero pole diagram of output impedance. B Bode diagram of output impedance. C Zero pole diagram of voltage gain.
D Bode diagram of voltage gain. In Figure 2A , assuming that the voltage on the transformer secondary side is Vs , when the transformer is working in a steady state, the positive half cycle can be deduced as:. In this power module, the rectifier capacitor can be charged and discharged in half a working cycle switching cycle.
By using the same type of high-voltage diode in the circuit, the forward voltage drop V D of each diode is equal:. By bringing Eqs 28 and 29 into Eq. The forward voltage drop V D of the rectifier diode is negligible relative to the transformer secondary side voltage V S , so the output voltage in Figure 2A is approximately eight times as V S. However, the above discussion only applies to the steady-state capacitors in the voltage doubler rectifier, while the transient charging circuit of the capacitors is shown in Figure 8.
Figure 8. Capacitor charging circuit. The maximum voltage across capacitance C 1 is:. The charging voltage of the capacitor at t is where R is the equivalent resistance of the forward charging path :. When the capacitor is discharged:. The voltage at one charge and discharge of capacitor C 1 is:. When the first switching cycle ends, C 1 transfers its own power to C 2. The voltage of C 2 is:. At the start of the second half of the cycle, C 3 charges to capacitor C 4 , in the same way as above:.
During the first half of each cycle in steady state, capacitors C 1 and C 3 are charged to their theoretical values, C 2 and C 4 supplies the load, C 1 and the secondary side winding charges C 2 and C 3 charges C 4 during the second half of the cycle.
And the theoretical waveforms for capacitors transient charging are shown in Figure 9A. Figure 9. Waveform for capacitors transient charging. A Theoretical waveforms for capacitors transient charging. B Simulation waveforms for capacitors transient charging. We use PSIM, a circuit simulation software, to simulate the capacitor charging of the full-wave voltage doubler rectifier. The simulation result is shown in Figure 9B , which verifies the capacitor transient charging analysis.
It also verifies that a stable high-voltage DC output can be achieved when the full-wave voltage doubler rectifier is in steady-state operation. We design a power module as shown in Figure 2A , which the input voltage is V, the output voltage is 1, V, the switching frequency is 50 kHz, and the maximum output power is greater than W.
High Voltage Power Supplies
If you really want to play with valve circuits, you need a power supply that can provide a very clean DC voltage, usually up to about V. It doesn't need to be regulated, but it does need to be variable and completely hum-free so you can determine the best operating conditions for the circuit you are using, without having or Hz hum messing up your measurements. You also need a heater supply, and that needs to be switchable between 6. This should also be DC. As regular readers will be aware, I have no plans for valve 'tube' based projects as such, but while working on a recent project and compiling articles for the valve section of the website, I found a need for just such a supply. It was important for me to be able to use parts I had to hand rather than spending money for special bits and pieces, so a means had to be found to get the voltages I needed using transformers I had available. While most hobbyists won't have these parts, they are readily available and fairly inexpensive, and the two transformers I used were perfectly matched for the job.
High Voltage Laboratory Power Supply Circuit 50V to 450V 500mA
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High Voltage Circuits
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Space High-Voltage Power Module
For those who experiment and build with vacuum tubes, an adjustable, regulated, benchtop high voltage power supply is essential. Many circuits for such units have been described that themselves use tubes. This example is built around the LR8N3: a three-terminal high voltage regulator. It includes 6. Figure 1 shows the supply.
Simple 60kV DC high voltage supply
This high voltage power supply has been designed to output a fixed voltage of around 50kV, it could easily be converted to an adjustable supply by connecting a variac in case of using transformers or by adding some extra circuitry to regulate the power going in. I initially thought about a high frequency PWM to regulate the power going into the capacitors, but I abandoned the idea. I found that adjusting the frequency is enough to make the voltage vary by a significant amount, allowing some control over it, this happens because the flyback must operate at a certain frequency in order to maximize the output. This shows the importance of having a big pile of electronic junk, specially old stuff with chunky electric and electronic components, it doesn't matters if you have to pick it from the dumpster, it can save you tons of money on the long run and by repurposing these devices you're being Eco-friendly. A good practice it to save the tin when desoldering and avoid throwing it into the trashcan and when you're done with the board or there are no more valuable components you can take it to a place where it can be recycled properly. Caution has been taken in order to isolate the high voltage output from the user and the internal circuitry.
High Voltage Power Supply
A power supply is an electrical device that supplies electric power to an electrical load. The primary function of a power supply is to convert electric current from a source to the correct voltage , current , and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters.
Laboratory Power Supply Voltage adjustable from 50 to volts in a current of milliamps, with a stable 0. We will see later against the benefits of this reaction. Warning: The conduct of this project requires experience and professionalism. Tensions are conveyed all dangerous, in the same way as those generated in tube amplifiers.
About Help Login. Back to Results High Voltage Power Supply Design Guide for Space This book is written for newcomers to the topic of high voltage HV in space and is intended to replace an earlier s out-of-print document. It discusses the designs, problems, and their solutions for HV, mostly direct current, electric power, or bias supplies that are needed for space scientific instruments and devices, including stepping supplies. Output voltages up to 30kV are considered, but only very low output currents, on the order of microamperes. The book gives a brief review of the basic physics of electrical insulation and breakdown problems, especially in gases. It recites details about embedment and coating of the supplies with polymeric resins. Suggestions on HV circuit parts follow.
Universal high voltage power supply kit. This HV power source may be used in a variety of different high voltage applications, like: kirlian photography HeNe Laser tube power supply x-ray tubes plasma tubes negative ion generators, etc. Features variable frequency using a potentiometer. Also has a High-Low frequency range switch.
I am final, I am sorry, but it is all does not approach. There are other variants?