Voltage Source Compensation Circuit for Higher Loop Bandwidth
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Solution Overview
Problem
Conventional feedback/compensation circuits in voltage sources introduce issues such as bandwidth limitations and response time delays, making it challenging to maintain stable output voltage under varying load conditions.
Innovation Solution
A circuit comprising a sensing unit, a first adjustment unit, an amplifier unit, and a second adjustment unit is proposed. This circuit generates additional zero points and pole points in the transfer function to enhance the loop bandwidth, allowing for improved dynamic response without redesigning other parts of the voltage source or circuit system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional feedback/compensation circuit is arranged to detect the output voltage and transfer it to a controller, then the output voltage stability is improved, but the bandwidth is limited and the response time increases
Solution Approach 1:
The compensation circuit is divided into multiple functional modules: a sensing unit for detecting output voltage, a first adjustment unit for generating pole-zero compensation, an amplifier unit for signal amplification, and a second adjustment unit for additional pole-zero adjustment. This segmentation allows each module to be optimized independently, improving overall response speed while maintaining stability.
Solution Approach 2:
The circuit dynamically adjusts compensation parameters by generating additional zero points and pole points in the transfer function. The first adjustment unit creates a zero point to compensate for the LC resonant pole, while the second adjustment unit adds another zero point. This parameter modification enables the system to achieve higher bandwidth and faster response time without sacrificing output voltage stability.
2Stability of the object's composition
If a conventional feedback/compensation circuit is arranged to detect the output voltage and transfer it to a controller, then the output voltage stability is improved, but the device complexity increases
Solution Approach 1:
The sensing unit, first adjustment unit, amplifier unit, and second adjustment unit are integrated into a single compensation circuit block that interfaces with the existing controller. This merging approach consolidates multiple compensation functions into one unified circuit, reducing overall device complexity compared to implementing separate compensation circuits for each function.
Solution Approach 2:
The compensation circuit is designed to perform multiple functions simultaneously: voltage sensing, pole-zero compensation, signal amplification, and bandwidth extension. By making the circuit multi-functional, the patent avoids the need for separate dedicated circuits for each function, thereby reducing device complexity while maintaining output voltage stability.
3Speed
If additional zero points and pole points are generated in the transfer function, then the loop bandwidth is increased, but the circuit complexity increases
Solution Approach 1:
The first adjustment unit generates a zero point to compensate for the LC resonant pole by adjusting the transfer function parameters. The second adjustment unit generates an additional zero point at a higher frequency. These parameter changes are achieved through simple RC circuit configurations rather than complex active components, increasing loop bandwidth while minimizing circuit complexity.
Data Source
AI summary
The present disclosure relates to a circuit and a method for compensating output of voltage source, and the voltage source. The circuit for compensating an output of a voltage source, comprises: a sensing unit, a first adjustment unit, an amplifier unit, and a second adjustment unit. The first adjustment unit is coupled in parallel with the sensing unit, and configured to generate at least one pole point and/or at least one zero point in a transfer function of the circuit; the second adjustment unit is configured to generate at least one zero point in the transfer function of the circuit. Therefore, the first adjustment unit, and the second adjustment unit are arranged for generating adjustable zero points and pole points in the transfer function of the voltage source, so as to obtain a higher loop bandwidth.