Switchable Half-Bridge Amplifier for High-Voltage or High-Current Testing
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Solution Overview
Problem
Existing test devices for electrical components are bulky and heavy due to separate voltage and current amplifiers, which limits their portability and efficiency in generating high-test voltage and high-test current signals simultaneously.
Innovation Solution
A switching unit in the amplifier connects first and second half bridges in parallel for high-test current output and in series for high-test voltage output, allowing the same signal output to be used in different modes, reducing the number of components and overall size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If separate voltage amplifier and current amplifier are provided, then high-test voltage and high-test current can be output, but the device becomes bulky and heavy
Solution Approach 1:
The patent combines the voltage amplifier and current amplifier into a single integrated amplifier unit with a unified half-bridge circuit topology. The switching unit dynamically reconfigures the same power stage to deliver either high voltage or high current output, eliminating the need for separate amplifier modules and reducing overall device weight.
Solution Approach 2:
The integrated amplifier employs a universal half-bridge circuit that can operate in multiple modes through the switching unit. The same power stage components (switches, capacitors, inductors) serve dual purposes: generating high-test voltage in voltage amplifier mode and high-test current in current amplifier mode, making the device versatile and compact.
2Power
If separate voltage amplifier and current amplifier are provided, then high-test voltage and high-test current can be output, but the device complexity increases
Solution Approach 1:
The patent merges two separate amplifier circuits into one integrated design using a single half-bridge topology. The switching unit controls the configuration of shared components to achieve both voltage and current amplification functions, significantly reducing the total number of components and simplifying the overall circuit architecture.
Solution Approach 2:
The switching unit dynamically reconfigures the half-bridge circuit topology based on the desired output mode. By dynamically switching between series and parallel connections of the same power stage components, the system achieves both high voltage and high current capabilities without requiring multiple static circuit configurations.
Data Source
AI summary
To provide a lightweight and robust voltage amplifier and current amplifier for a test device for testing an electrical component, an amplifier is designed to output a test signal at a signal output between a positive output terminal and a negative output terminal. The amplifier includes a first half bridge and a second half bridge. A switching unit is provided, which is designed to connect the first half bridge and the second half bridge in parallel to the signal output in a first operating mode and to connect the first half bridge and the second half bridge in series with the signal output in a second operating mode.