Energy Transfer Control Device Active EMI Suppression
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Solution Overview
Problem
Existing energy transfer management devices generate electromagnetic disturbances and are costly due to the use of expensive filters to limit voltage variations, especially when switches are driven by pulse-width modulated signals.
Innovation Solution
An energy transfer management device with a set of switches and diodes, including a fourth elementary switch controlled in synchronization with the second set of switches, to limit voltage variations by placing switches in intermediate states during pulse-width modulation, reducing electromagnetic disturbances and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dedicated filter comprising capacitors is used to filter voltage ripples, then electromagnetic disturbances are limited, but the device cost increases significantly
Solution Approach 1:
The patent replaces the traditional passive mechanical filter (capacitors) with an active electronic control system. The supervisor actively modulates the switching elements to limit voltage variations, substituting passive filtering components with active control mechanisms that achieve the same electromagnetic disturbance mitigation without the high cost of dedicated capacitor filters
Solution Approach 2:
The patent changes the operational parameters of the switching elements by introducing intermediate states between fully on and fully off. This parameter modification allows for active limitation of voltage variations at the terminal, achieving electromagnetic disturbance reduction through controlled parameter adjustment rather than passive filtering
2Productivity
If switches are driven by pulse-width modulated signals to control current, then current limitation is achieved, but voltage variations and electromagnetic disturbances increase
Solution Approach 1:
The supervisor monitors the voltage at the terminal and uses this feedback information to adjust the modulation of switching elements. This feedback mechanism allows the system to respond to voltage variations caused by PWM switching and actively compensate for them, maintaining current control capability while reducing harmful voltage fluctuations
Solution Approach 2:
The patent introduces dynamic control of switching elements with multiple states (off, intermediate, on) that can be adjusted in real-time. This dynamic adjustment allows the system to smooth out voltage variations during PWM operation by transitioning switches through intermediate states rather than abrupt on/off changes, reducing electromagnetic disturbances while maintaining productivity
Data Source
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AI summary
The invention relates to an energy transfer control device (5.1-5.8) including a first set of switches (51) connected to both the second terminal (P1) and the third terminal (P2), a second set of switches (53) connected to both the fourth terminal (P3) and the third terminal (P2), the first set of switches (51) comprising a first diode (51c) of which the cathode is connected to the third terminal (P2), and a second basic switch (51b) connected in parallel with the first diode (51c), the second set of switches (53) comprising a second diode (53b) of which the cathode is connected to the third terminal (P2), and a first flyback diode (56) of which the anode is connected to the first terminal (M) and of which the cathode is connected to the anode of the second diode (53b). The invention is characterized in that the first set of switches (51) further comprises: a third diode (51e) of which the anode is connected to the anode of the first diode (51c), and a basic switch (51d), referred to as the fourth basic switch, connected in parallel with the third diode (51e).