High Pulse Voltage Device Diode Switching Control
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Solution Overview
Problem
Existing designs for generating high pulse voltage fail to minimize short-term pulse electromagnetic noise radiation due to the inertia of non-linear elements, particularly diodes, which leads to increased electromagnetic interference.
Innovation Solution
Incorporating a second controlled switch and a square pulse duration converter to manage the switching time of the diode, ensuring the diode is off before the high potential is applied, thus preventing pulse current surges and noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a diode is used in the high voltage pulse generation circuit, then the circuit can achieve voltage multiplication and pulse generation, but the diode's switching inertia generates electromagnetic noise radiation
Solution Approach 1:
The patent applies preliminary action by提前 turning off the diode before the high voltage pulse is applied to it. The control circuit is designed to close the circuit containing the diode and capacitor in advance, allowing the diode to be turned off before the high potential is applied during the pulse generation phase. This prevents the diode's switching inertia from generating electromagnetic noise while maintaining the voltage multiplication function.
2Ease of operation
If the diode switching time is not synchronized with the pulse generation timing, then the circuit operation is simpler, but pulse current surges occur causing electromagnetic interference
Solution Approach 1:
The patent implements feedback control through a control circuit that monitors the timing of the high voltage pulse and accordingly controls the switching of the diode. The control circuit receives feedback about the pulse generation timing and adjusts the diode switching to occur beforehand, preventing current surges and electromagnetic interference while maintaining synchronized operation.
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
The proposed design significantly reduces pulse electromagnetic noise radiation, enhancing electromagnetic compatibility and environmental ecological conditions by synchronizing the diode switching time with the pulse generation, eliminating noise present in prior art designs.
Implementation Method 1
a first capacitor (20) connected by one (first) plate (21) thereof to a cathode (23) of the diode (22) and by another (second) plate (24) thereof to another terminal (8) of the inductive load (2)
Implementation Method 2
an inductive load (2) made as a winding on a core and including a primary winding of a transformer (3)
Data Source
Figure 1
Figure 2-1~2d
Figure 2-2~2g
AI summary
A device for generating a high pulse voltage comprises a source of high constant voltage (1), an inductive load (2), two controllable switching devices (6) and (41), a controllable switch (25), and also, connected in series, a capacitor (20), a diode (22) and an additional controllable switch (28), and a controllable pulse duration converter (33) for converting the duration of pulses from a control circuit (14). The result is a reduction in the level of interference emitted into the environment.