Active Voltage Bus Converter for Dynamic DC Bus Regulation
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Solution Overview
Problem
Existing voltage converter systems lack the ability to dynamically adjust output DC bus voltage without hardware reconfiguration, limiting their efficiency and adaptability in applications such as electric motor drives.
Innovation Solution
A bidirectional voltage converter system with a power storage element and a controller that adjusts current flow between bidirectional voltage lines to maintain a target DC voltage, allowing for dynamic adjustment of the output DC bus voltage without hardware reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the output DC bus voltage is fixed by hardware configuration, then the system structure is simple, but the adaptability to different voltage requirements is poor
Solution Approach 1:
The patent implements dynamic voltage adjustment by replacing fixed hardware configuration with a controllable power conversion system. The converter uses pulse-width modulation (PWM) control to dynamically adjust the output DC bus voltage according to real-time load requirements, enabling the system to adapt to different voltage levels without physical reconfiguration.
Solution Approach 2:
The system changes the operating parameters of the power converter to achieve different output voltages. By adjusting the duty cycle of the PWM signal and controlling the switching elements, the converter can output different DC voltage levels from the same AC input,实现ing flexible voltage adaptation without hardware changes.
2Use of energy by moving object
If the DC bus voltage is dynamically adjusted, then the power efficiency is improved, but the control complexity increases
Solution Approach 1:
The patent implements a closed-loop control system that continuously monitors the output DC bus voltage and adjusts the PWM duty cycle accordingly. The feedback mechanism compares the actual voltage with the reference voltage and modifies the switching control to maintain optimal voltage levels, improving power efficiency while managing control complexity through automated regulation.
Solution Approach 2:
The system pre-calculates and stores optimal PWM duty cycle values for different voltage requirements. When voltage adjustment is needed, the controller retrieves pre-computed parameters rather than calculating them in real-time, reducing the computational burden and control complexity while maintaining efficient power conversion.
3Temperature
If the voltage converter uses fixed voltage output, then the device complexity is low, but the thermal efficiency under varying load conditions deteriorates
Solution Approach 1:
The patent employs dynamic voltage regulation to match the output voltage with the actual load requirements. By continuously adjusting the DC bus voltage according to load changes, the system minimizes power losses and reduces unnecessary heat generation, thereby improving thermal efficiency without requiring oversimplified fixed-voltage hardware.
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 system achieves improved power efficiency and thermal efficiency by dynamically adjusting the DC bus voltage in real-time, enhancing motor performance and reducing component stress.
Implementation Method 1
The power storage element (L1) arranged between the first bidirectional voltage line and the second bidirectional voltage line
Implementation Method 2
a switch element electronically coupled to the power storage element
Implementation Method 3
The bidirectional isolation circuit may comprise an isolation transformer
Data Source
AI summary
A voltage converter (110, 210) having a first bidirectional voltage line (112, 212), a second bidirectional voltage line (114, 214), a power storage element (L1) arranged between the first bidirectional voltage line and the second bidirectional voltage line, a switch element electronically coupled to the power storage element, a controller (141) for controlling the switch, and the controller configured and arranged to adjust a current flow between the first voltage line and the second voltage line such that a voltage level on the second bidirectional voltage line is substantially maintained at a target DC voltage.