High-Voltage Control Circuit for Fast DC Voltage Bucking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-voltage control circuits take a long time to change DC voltage from a large value to a small value during voltage bucking, necessitating complex control algorithms and external signal processing, which complicates configuration changes when load conditions vary.
Innovation Solution
A high-voltage control circuit with a switch circuit connected in parallel to a smoothing capacitor, controlled by an amplifier that adjusts conduction based on differential voltage between a command voltage and a divided voltage, allowing for rapid discharge during voltage bucking without complex algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a switch circuit is provided in parallel with a smoothing capacitor to speed up voltage bucking, then the voltage bucking time is shortened, but it requires external signal processing and complicated control algorithms
Solution Approach 1:
The patent uses feedback control by comparing the actual output voltage with a reference voltage through an operational amplifier. The operational amplifier automatically generates control signals based on the voltage difference, eliminating the need for complex external control algorithms while achieving fast voltage bucking through the parallel switch circuit.
Solution Approach 2:
The control system is self-regulating through the operational amplifier that automatically adjusts the switch circuit conduction based on the real-time voltage difference between output and reference voltages. This self-service mechanism eliminates the need for external signal processing and complex control algorithms.
2Ease of operation
If discharge control is performed using external signals or processors, then voltage bucking can be controlled, but the configuration becomes complicated when load conditions change
Solution Approach 1:
The operational amplifier-based control circuit serves multiple functions: it compares voltages, generates control signals, and adapts to different load conditions automatically. This universal control mechanism handles various load scenarios without requiring configuration changes, improving both ease of operation and adaptability.
3Speed
If a switch circuit is added in parallel with the smoothing capacitor, then voltage bucking speed is improved, but the device configuration becomes more complex
Solution Approach 1:
The patent merges the control function into the existing feedback loop by using the operational amplifier that is already part of the voltage regulation system. The switch circuit is integrated with the feedback control, combining multiple functions into a unified structure that achieves fast voltage bucking without significantly increasing overall system complexity.
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 circuit enables fast voltage bucking times with a simple configuration, eliminating the need for complicated control algorithms and external signal processing, and allows for efficient voltage adjustments in response to load changes.
Implementation Method 1
a feedback circuit including a first amplifier configured to amplify a differential voltage between a command voltage and a voltage value following the DC high voltage
Implementation Method 2
a second amplifier configured to amplify the differential voltage. Here, conduction of the switch circuit is controlled by an output signal of the second amplifier
Implementation Method 3
a smoothing capacitor configured to smooth the DC high voltage output from the high-voltage rectifier circuit
Implementation Method 4
a high-voltage rectifier circuit configured to convert an AC voltage into a DC high voltage
Data Source
AI summary
Provided is a high-voltage control circuit capable of shortening a time required for voltage bucking with a simple configuration without requiring a complicated control algorithm. A high-voltage control circuit 1 includes: a high-voltage rectifier circuit 100 configured to convert an AC voltage into a DC high voltage; a smoothing capacitor 140 configured to smooth the DC high voltage output from the high-voltage rectifier circuit 100; a switch circuit 102 connected in parallel to the smoothing capacitor 140; a feedback circuit 103 including an error amplifier 133 configured to amplify a differential voltage Vdf between a command voltage Viv and a divided voltage Vdv following the DC high voltage, and configured to control the high-voltage rectifier circuit 100 based on an output signal of the error amplifier 133; and an amplifier 105 configured to amplify the differential voltage Vdf. The switch circuit 102 is controlled by an output signal of the amplifier 105.