Variable Frequency Voltage Regulator Load Current Adaptation
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Solution Overview
Problem
Conventional voltage regulators often operate at a fixed switching frequency, which is optimal only for high or low output current ranges, leading to inefficiencies at medium and lighter loads, as the frequency settings do not account for varying load conditions effectively.
Innovation Solution
A variable frequency voltage regulator system that includes a sense circuit and a frequency adjust circuit, dynamically adjusting the operating frequency based on sensed output conditions, such as output current, to optimize efficiency across a wider range of operating conditions, using a voltage scaling circuit to convert current signals into frequency inputs for the controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a fixed switching frequency is used in voltage regulators, then the design is simple and reliable, but the efficiency is poor at medium and lighter load conditions
Solution Approach 1:
The patent implements dynamic frequency adjustment by transitioning from a fixed switching frequency to a variable frequency that adapts to load conditions. The controller dynamically selects between a first switching frequency for high output current ranges and a second switching frequency for low output current ranges, optimizing efficiency across different operating conditions while managing the complexity through structured frequency selection logic.
Solution Approach 2:
The patent changes the switching frequency parameter based on output current ranges. By implementing a first switching frequency for high current ranges and a second switching frequency for low current ranges, the system optimizes efficiency for each operating condition. This parameter change is achieved through load condition detection and corresponding frequency selection in the controller.
2Loss of energy
If the switching frequency is adjusted dynamically based on load current, then efficiency is improved across a wider range of operating conditions, but the device complexity increases
Solution Approach 1:
The patent segments the operating range into distinct output current ranges, with each range having an optimized switching frequency. The controller divides the operation into high current ranges using a first switching frequency and low current ranges using a second switching frequency. This segmentation approach manages complexity by creating clear boundaries and dedicated frequency selections for different operating conditions.
Solution Approach 2:
The patent implements feedback mechanisms through load condition detection that monitors output current and provides information to the controller. This feedback enables the controller to adjust the switching frequency appropriately based on the detected load conditions, optimizing efficiency while maintaining manageable complexity through structured feedback processing.
3Speed
If a single switching frequency is used for all load conditions, then the control circuit is simple, but the response to transient load changes is slow
Solution Approach 1:
The patent implements dynamic frequency adjustment that responds to transient load changes by detecting load conditions and switching between different frequencies. This dynamic response enables faster adaptation to changing load requirements compared to fixed frequency systems, while the structured approach to frequency selection manages the complexity of the control circuit.
Data Source
AI summary
In some embodiments, a voltage regulator device may include a variable frequency voltage regulator, a sense circuit coupled to an output of the variable frequency voltage regulator, the sense circuit to sense a signal corresponding to an output condition of the variable frequency voltage regulator, and a frequency adjust circuit coupled between the sense circuit and the variable frequency voltage regulator, the frequency adjust circuit to dynamically adjust an operating frequency of the variable frequency voltage regulator based on the signal sensed by the sense circuit during operation of the variable frequency voltage regulator. For example, the frequency adjust circuit may be configured to adjust the operating frequency of the variable frequency voltage regulator over a range of frequencies for a corresponding range of sensed output conditions. Other embodiments are disclosed and claimed.