Bus Converter Control Unit for Reducing Transformer Winding Losses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional bus converters with transformers experience efficiency losses due to primary current flowing into the ground line, which affects power density and conversion efficiency.
Innovation Solution
A control unit is configured to short-circuit the first negative voltage terminal on the primary side and the second positive voltage terminal on the secondary side, reducing the number of winding turns in the transformer and minimizing turn-on losses, thereby improving conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the input ground terminal and output ground terminal are shorted together to facilitate ground line arrangement, then the setting of driving signals becomes easier, but primary current flows into the ground line causing loss
Solution Approach 1:
The patent extracts the ground connection function from the traditional shorted ground configuration. By separating the input ground terminal from the output ground terminal and using a virtual ground reference technique, the patent eliminates the harmful ground line current path while preserving the ease of driving signal generation. The virtual ground reference is created through capacitive coupling and signal processing, allowing ground lines to be arranged conveniently without causing energy loss.
2Ease of manufacture
If the transformer ratio is N:1 with conventional winding configuration, then the converter structure is standard, but the number of winding turns increases causing higher turn-on loss
Solution Approach 1:
The patent changes the effective transformer ratio parameter from N:1 to (N-1):1 by utilizing the virtual ground reference technique. This parameter change reduces the number of primary winding turns required, thereby reducing the copper loss and turn-on loss of the transformer while maintaining the same power conversion function. The structural simplicity is preserved through the use of standard transformer components with optimized winding configuration.
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
This approach reduces turn-on losses and enhances the efficiency and power density of the converter by altering the transformer ratio from N:1 to (N-1):1, minimizing energy loss and component size.
Implementation Method 1
a bus converter usually uses a converter with a transformer
Data Source
AI summary
A control unit is provided. The control unit is configured to provide a control signal for controlling a power unit. The power unit includes a first positive voltage terminal, a second positive voltage terminal, a first negative voltage terminal, a second negative voltage terminal, and a switching element. The first negative voltage terminal and the second positive voltage terminal are coupled to each other in a short circuit manner. One terminal of the switching element is electrically connected to the first negative voltage terminal. The control unit is configured to: receive a pulse width modulation signal; receive a first power supply signal; receive a second positive voltage terminal signal; output a second power supply signal; and output the control signal for controlling the switching element to be turned on or turned off.