Bi-directional Power Regulator Circuit for Voltage Control
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Solution Overview
Problem
Existing power supply systems require large filter capacitors to regulate voltage, which is inefficient and increases the size of the power supply apparatus.
Innovation Solution
A bi-directional power regulator circuit that uses a power storage device to store energy when the voltage exceeds a threshold and supplies energy when it falls below, incorporating switching elements and an integrated circuit to control the power flow, allowing for efficient voltage regulation and reducing the size of the filter capacitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional voltage regulator with PWM module and optical coupler is used, then voltage regulation is achieved, but the filter capacitor size becomes prohibitively large
Solution Approach 1:
The power conversion function is divided into separate bidirectional converter stages (first converter and second converter) that operate in sequence. Each converter handles a portion of the power conversion task, allowing for smaller individual capacitor sizes while maintaining overall voltage regulation performance.
Solution Approach 2:
The bidirectional converters dynamically switch between different operating modes (power factor correction mode, voltage regulation mode, energy recovery mode) based on real-time conditions. This dynamic operation allows the system to maintain voltage regulation with reduced capacitor sizing compared to static traditional regulators.
2Stability of the object's composition
If a large filter capacitor is used for voltage regulation, then voltage stability is improved, but the overall power supply size and complexity increase
Solution Approach 1:
The bidirectional converters serve multiple functions simultaneously: power factor correction, voltage regulation, and energy recovery. This multi-functionality eliminates the need for separate dedicated circuits for each function, reducing overall system complexity while maintaining voltage stability.
Solution Approach 2:
The system changes operating parameters (switching frequencies, duty cycles, converter modes) dynamically to maintain voltage stability under varying load conditions. This parameter adjustment approach replaces the need for large fixed-capacitance filtering with adaptive control.
3Reliability
If traditional closed-loop regulation with optical coupler is used, then voltage control is achieved, but circuit complexity increases
Solution Approach 1:
The feedback control function is merged into the bidirectional converter control circuitry. The same control system that manages the bidirectional switching also performs voltage regulation feedback, eliminating the need for separate optical coupler and PWM module circuits while maintaining effective voltage control.
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 solution reduces the size of the filter capacitor, enhances the efficiency of the power supply circuit, and simplifies the complexity of traditional closed-loop systems by effectively regulating voltage through boost and buck converter operations.
Implementation Method 1
A power storage device is selectively used to store energy as the sensed voltage exceeds a threshold and supply energy as the sensed voltage falls below the threshold
Implementation Method 2
The regulating circuit includes control signals coupled to a plurality of switching elements for operating the switching elements selectively as boost and buck converters of the apparatus for supplying power
Data Source
AI summary
A regulated power supply apparatus is provided. The apparatus includes an input power converting circuit for generating a rectified voltage signal, an output power converting circuit comprising a plurality of switching elements, the output power converting circuit coupled to receive the rectified voltage signal, an output power storing element coupled with the output power converting circuit, and an output power bidirectional regulating circuit comprising an integrated circuit coupled with the output power converting circuit, the bidirectional regulating circuit including control signals for operating the switching elements to store power on the output power storing element and to deliver power to an output load from the output power storing element. An integrated circuit controlled regulator circuit is provided for controlling a plurality of switches a boost and buck converter. A method of regulating power supply is also provided.