DC to DC Converter Transistor Rectification Efficiency
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Solution Overview
Problem
Existing DC to DC converters have low transform efficiency due to the high resistance of rectifying diodes, which results in significant power consumption and reduced efficiency in converting AC voltage to high voltage DC sources.
Innovation Solution
The proposed DC to DC converter design eliminates the rectifying diode by using a second rectifying and filtering circuit with a transistor and control circuit that switches the transistor on and off to transform AC voltage to DC voltage, reducing internal resistance and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a rectifying diode is used in the second rectifying and filtering circuit, then the AC voltage can be rectified to DC voltage, but the high resistance of the diode causes significant power consumption and reduces transform efficiency
Solution Approach 1:
The patent removes the rectifying diode from the second rectifying and filtering circuit entirely. Instead, it uses a transistor (Q2) controlled by a control circuit to perform the rectification function. This extraction of the problematic diode component directly eliminates the source of high resistance and power consumption, resolving the contradiction between energy loss and transform efficiency.
Solution Approach 2:
The patent changes the operating parameters of the rectifying circuit by replacing the diode with a transistor-based switching circuit. The transistor operates in switching mode (fully on or fully off) rather than the linear conduction mode of a diode, dramatically reducing resistive losses. This parameter change from continuous conduction to switching operation resolves the efficiency problem while maintaining rectification functionality.
2Ease of operation
If a rectifying diode is used in the second rectifying and filtering circuit, then the circuit can function, but the large resistance results in large power consumption
Solution Approach 1:
The patent extracts the rectifying diode from the circuit and replaces it with a transistor-based solution. The control circuit generates appropriate control signals to switch the transistor on and off, achieving rectification without the high resistance characteristic of diodes. This maintains full circuit functionality while dramatically reducing power consumption.
Solution Approach 2:
The patent substitutes the passive, always-conducting diode mechanism with an active transistor switching mechanism controlled by electrical signals. This substitution allows for controlled conduction periods and reduces resistive losses, resolving the contradiction between maintaining circuit functionality and reducing energy consumption.
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 design significantly increases the transform efficiency of the DC to DC converter by minimizing internal resistance, leading to improved power conversion and reduced power consumption.
Implementation Method 1
a first transformer configured to receive the first DC voltage and transform the first DC voltage to a second AC voltage
Implementation Method 2
a control circuit for switching on or switching off the first transistor so as to transform the second AC voltage to a second DC voltage
Data Source
AI summary
An exemplary direct current (DC) to DC converter includes a first rectifying and filtering circuit configured to receive an alternating current (AC) voltage and transform the AC voltage to a first DC voltage, a pulse width modulation (PWM) circuit, a first transformer configured to receive the first DC voltage and transform the first DC voltage to a second AC voltage under control of the PWM circuit, and a second rectifying and filtering circuit including a first transistor and a control circuit for switching on or switching off the first transistor so as to transform the second AC voltage to a second DC voltage.