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If you want a counseling interview or you have any problems with your electronics or a short question.

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Building a Capacitive Load for a High-Voltage DC Network Test Station

Test stations for high-voltage DC networks are complex undertakings, especially when the voltage exceeds the European three-phase voltage of 400V and a capacitance greater than 1mF is required. This was the primary challenge in building this test station. Additionally, a continuous current had to flow through load resistors, which added a computational challenge in charging, discharging, and balancing the capacitors. Project Requirements: DC Network Voltage: The load voltage should increase from 0 to 830V within 2 seconds. Capacitance: The system should support capacitances of 1mF, 2mF, and 10mF. Parallel Resistive Load: Each capacitance should be paired with a parallel resistive load of 8kΩ, 4kΩ, and 800Ω, respectively. Current Measurement: Implement current measurement for the charging current. Temperature Monitoring: Basic temperature measurement for capacitors and resistors within their operational limits. Integrated Emergency Shutdown: Inc...

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All that you have to know is described in the next self ms-paint drawn picture... Entry end ... Just a joke. Iwant to tell you a few words more about it. The life of an engineer begins with a customer specification. The engineer thoroughly analyzes this specification and quickly presents a block diagram to the boss and the customer, outlining a possible approach. Alternatively, the boss or the marketing team may specify the required topology for the DC-DC converter. Then comes the research phase. The engineer (or even a junior engineer) frantically searches the internet for application notes, might have discovered some useful resources on the company’s internal network, and promptly updates an Excel spreadsheet with intricate calculations, cell dependencies, and a design curve aimed at maximizing customer satisfaction. A quick LTSpice simulation is performed, and then it's time to order the first prototype board... The board arrives, and small voltages ...

Optimizing Flyback Circuits Using Depletion Mode MOSFETs and Miller Capacitance Management

In high-voltage flyback converters, using a Depletion Mode MOSFET is an effective strategy to manage switching behavior during power-up, especially in circuits with SiC MOSFETs . The depletion-mode MOSFET remains normally on without gate voltage, which helps control the startup behavior of the converter. One of the primary concerns in such circuits is the Miller capacitance , or drain-gate capacitance (Cdg). This capacitance can cause unwanted false turn-on during power-up due to the voltage coupling between the drain and gate. Circuit Breakdown: Power-Up Control : Initially, when high voltage is applied to the flyback converter, the depletion-mode MOSFET ensures that the SiC MOSFET remains off, effectively blocking any unintentional switching. Miller Capacitance : During the initial voltage rise, the Miller capacitance can couple part of the changing voltage to the gate, potentially causing unwanted activation. By utilizing the depletion-mode MOSFET, the gate remains protected un...

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