HRPWM Controller for Wireless Power Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power systems face challenges in achieving high-resolution pulse-width modulation (PWM) for precise control of switching elements in converters and inverters, which is crucial for efficient power transmission and noise reduction, but current technologies lack the necessary precision and flexibility.
Innovation Solution
The implementation of high-resolution pulse-width modulation (HRPWM) controllers that utilize a delay line and digital control to generate highly precise PWM signals, with a master counter determining the repetition rate and independent channel configuration capabilities, allowing for varying duty cycles and fine resolution adjustments to optimize pulse width and timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional PWM control is used in wireless power systems, then the system structure remains simple, but the control precision and noise reduction capability are insufficient
Solution Approach 1:
The PWM controller is segmented into multiple independent channels (first channel with coarse_on/coarse_off registers, second channel with fine_on/fine_off registers). Each channel can be independently configured and controlled, allowing precise PWM generation for different switching elements without requiring a completely complex unified control structure. This segmentation enables high-resolution control while maintaining manageable system architecture.
Solution Approach 2:
The patent introduces a new dimension of control by adding fine-resolution timing registers (fine_on/fine_off) alongside the traditional coarse-resolution registers. This creates a two-level control dimension where coarse registers handle overall timing and fine registers provide sub-clock-cycle precision through delay lines, achieving high-resolution PWM without proportionally increasing overall system complexity.
2Productivity
If high-resolution PWM control is implemented, then power transmission efficiency improves, but the device complexity increases
Solution Approach 1:
The controller divides power conversion paths into separate channels (converter channels and inverter channels), each with dedicated PWM control registers. This segmentation allows optimized high-resolution control for each power conversion stage, improving overall transmission efficiency while distributing complexity across modular channels rather than requiring a monolithic complex controller.
Solution Approach 2:
The patent implements dynamic control capabilities where PWM duty cycles and timing can be adjusted in real-time through programmable registers. The fine-resolution delay lines enable dynamic timing adjustments without changing the fundamental controller architecture, allowing efficiency optimization while maintaining structural consistency.
3Object-affected harmful factors
If fine resolution delay lines are added to achieve precise timing control, then noise reduction improves, but the device complexity increases
Solution Approach 1:
The noise reduction approach is segmented into channel-specific delay line circuits rather than a global complex filtering system. Each PWM channel has its own fine-resolution delay line that can independently adjust timing to minimize switching noise, providing targeted noise reduction without requiring a monolithic complex noise control architecture.
Solution Approach 2:
The fine-resolution delay lines act as intermediary elements between the coarse PWM generation and the actual switching elements. These delay lines provide precise timing adjustment capability, enabling noise reduction through optimized switching timing without requiring direct complex control of each switching element, thus reducing overall system complexity.
4Adaptability or versatility
If multiple independent channels with independent registers are implemented, then flexibility and adaptability improve, but the device complexity increases
Solution Approach 1:
The controller is divided into multiple independent channels, each with its own set of PWM control registers (coarse_on/coarse_off for first channel, fine_on/fine_off for second channel). This segmentation provides flexibility for different power conversion configurations while maintaining a repetitive modular structure that prevents exponential complexity growth, as each channel follows the same register pattern.
Solution Approach 2:
The patent implements universal register structures that can be applied across multiple channels for different power conversion topologies. The same coarse/fine register paradigm works for both converter channels and inverter channels, providing adaptability to various configurations without requiring entirely different control structures for each application, thus limiting complexity growth.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The disclosure features high-resolution pulse-width modulation (HRPWM) controllers that can include a first channel having a first coarse_on register and a first coarse_off register and a counter configured to determine a repetition rate for the first channel. When a coarse_on value of the first coarse_on register and the counter are equal, the first channel can be set "active" and when a coarse_off value of the first coarse_off register and the counter are equal, the first channel can be set "inactive". The controllers can include a delay line configured to generate a set of delay locked waveforms offset by a fine resolution value and a control module configured to select a delay locked waveform from the set of delay locked waveforms and apply the selected delay locked waveform to the first channel.