Rectifier Circuit Transient Current Reduction via Parasitic Capacitance
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Solution Overview
Problem
Existing rectifier circuits fail to effectively reduce transient current, leading to energy losses in power supply systems.
Innovation Solution
A rectifier circuit design incorporating a second rectifier, a coil, and a transistor, where the second rectifier current flows from the third terminal to the first terminal, reducing transient current by charging parasitic capacitance and accumulating energy in the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a reverse voltage is applied to inhibit current in the rectifier, then current direction is controlled, but transient current is generated causing energy loss
Solution Approach 1:
The capacitor is pre-charged to a predetermined voltage before the rectifier operates. When transient current occurs during rectification, the pre-charged capacitor provides a charge path that suppresses the transient current spike. This preliminary preparation of the capacitor eliminates the need for complex active suppression circuits while effectively reducing energy loss from transient current.
Solution Approach 2:
The capacitor acts as an intermediary element between the rectifier and the power supply circuit. It mediates the transient current by providing an alternative charge path, absorbing the sudden current spike and releasing it gradually. This intermediary capacitor protects the rectifier from harmful transient effects while maintaining circuit simplicity.
2Object-generated harmful factors
If conventional circuits with diodes and transformers are added in parallel to reduce transient current, then transient current is reduced, but device complexity increases
Solution Approach 1:
The invention extracts the essential function of transient current suppression from complex diode-transformer circuits and implements it through a single capacitor connected in parallel with the rectifier. By taking out only the necessary charge-storage function and implementing it with a simple capacitor, the circuit achieves transient current reduction without the complexity of additional active components.
Solution Approach 2:
The capacitor used for transient current suppression is a simple, inexpensive passive component that can be easily integrated into the circuit. Unlike complex active suppression circuits requiring multiple components, this single capacitor provides effective transient current reduction with minimal cost and complexity addition to the power supply circuit.
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 proposed rectifier circuit significantly reduces transient current, improving energy efficiency by converting coil energy into a second rectifier current that mitigates the transient current component, thereby minimizing energy losses.
Implementation Method 1
a coil connected to the third terminal and the second terminal
Implementation Method 2
reducing transient current by charging parasitic capacitance and accumulating energy in the coil
Data Source
AI summary
The present disclosure, in an aspect thereof, has an object to effectively reduce transient current in a rectifier circuit. In a rectifier circuit, a current flows from a power supply to a coil when a transistor is turned on. Then, when the transistor is turned off, a second rectifier current flows from the coil to a second rectifier.