Parallel Diode Unit for Power Switch Control Voltage
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Solution Overview
Problem
Existing converter circuits for generating supply voltage in high-voltage energy transmission are complex, costly, and require additional circuit elements, including damping circuits and control units, which can be fault-prone and inefficient.
Innovation Solution
A converter circuit utilizing a diode unit with diodes connected in opposite directions in parallel to the power semiconductor switch, generating a constant amplitude alternating voltage without additional circuit elements, and using a transformer for potential isolation and rectification to provide a robust and simple structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional voltage generating means (capacitors, complex regulating circuits) are used to generate supply voltage for the control unit, then the control unit can be powered, but the circuit structure becomes complex, costly, and fault-prone
Solution Approach 1:
The invention extracts the essential function of voltage generation by removing complex regulating circuits, damping circuits, and control elements. Only two diodes connected in opposite directions are retained to generate the alternating voltage, dramatically simplifying the circuit while maintaining reliability.
Solution Approach 2:
The diode unit generates the supply voltage autonomously using the existing current flow through the protective capacitor. No external control signals or additional power sources are needed - the circuit serves itself by utilizing the inherent voltage drops across the diodes during normal operation.
2Reliability
If additional circuit elements (damping circuits, control units, regulators) are added to generate supply voltage, then voltage regulation is achieved, but cost and device complexity increase
Solution Approach 1:
The invention replaces expensive, complex voltage generating components with inexpensive diodes. The diode unit is a simple, cheap component that can be easily manufactured and replaced if needed, significantly reducing production costs while maintaining functional stability.
Solution Approach 2:
The invention changes the approach to voltage generation by utilizing the natural forward voltage drop parameter of diodes (approximately constant at around 0.7V per diode) rather than attempting to regulate voltage through complex circuits. This parameter-based approach simplifies the entire voltage generation system.
3Power
If a complex voltage generating system with multiple components is used, then adequate supply voltage can be provided, but the system becomes less efficient and more prone to faults
Solution Approach 1:
The invention converts the previously wasted energy dissipation across the protective capacitor into a useful resource. The alternating voltage generated by the diode unit across the capacitor is no longer discarded but is directly utilized to power the control unit, turning a harmful energy loss into a beneficial power source.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a reliable and cost-effective supply voltage generation without damping circuits, allowing for efficient energy transmission and heat dissipation, while avoiding fault-prone components and ensuring robust operation across a range of current strengths.
Implementation Method 1
the diode unit converts the wiring current into an alternating voltage of constant magnitude, which is referred to here as the supply voltage
Implementation Method 2
transforming means, which are connected to the voltage generating means and are set up to convert the supply voltage into an intermediate AC voltage
Implementation Method 3
a rectifier unit for rectifying the intermediate AC voltage while obtaining the supply voltage
Data Source
Figure 1
AI summary
The invention relates to a power converter circuit (1) for generating a supply voltage for a power semiconductor switch (2), wherein a series circuit made of a diode unit (4) having diodes connected in reverse and a protection circuit (Rs,Cs) is connected in parallel with the power semiconductor switch. The diode voltage generates a feed voltage (UD) that is transformed (9), rectified (12), and provided as a supply voltage (UV).