Fan Power Reverse Protection Apparatus Circuit Design
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Solution Overview
Problem
Conventional power reverse protection apparatuses for electronic devices consume high power, are costly, and complex, making them inefficient and difficult to control, especially due to the use of multiple coils and high voltage capacitors.
Innovation Solution
A power reverse protection apparatus is designed with a voltage regulator switch and an activating device, connected to a fan and power source, which converts input signals into driving and output signals to operate the fan efficiently, eliminating the need for multiple coils and reducing power consumption by using fewer electronic elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple coils and high voltage capacitors are used to store energy and drive the power reverse protection apparatus, then the apparatus can be activated, but the power consumption increases and the device size becomes large
Solution Approach 1:
The patent changes the voltage parameter from high voltage to low voltage operation. The power reverse protection apparatus operates at low voltage levels, eliminating the need for high voltage capacitors and reducing power consumption while maintaining the protection function through alternative circuit design
Solution Approach 2:
The patent removes the coils (inductors) from the circuit design. By extracting this energy storage element, the design achieves power reverse protection without requiring large inductors, thereby reducing device size and material cost while maintaining core functionality
2Reliability
If multiple coils and high voltage capacitors are used to store energy, then the power reverse protection apparatus can be activated, but the device complexity increases and control becomes difficult
Solution Approach 1:
The patent extracts and removes the complex inductor-based energy storage circuit from the design. This simplifies the overall circuit architecture, reducing the number of components and making the system easier to control while maintaining the essential power reverse protection capability
Solution Approach 2:
The patent replaces expensive, complex energy storage components (coils and high voltage capacitors) with simpler, more economical circuit elements that achieve the same protective function with fewer parts and lower cost
3Reliability
If coils are used to store energy to drive the N-type MOSFET, then the power reverse protection apparatus can be activated, but the cost of the coil material increases
Solution Approach 1:
The patent removes the coils from the circuit design, eliminating the need for expensive coil materials. This extraction of the inductor component directly reduces material costs and simplifies the manufacturing process while preserving the core power reverse protection function through alternative circuit implementation
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 solution achieves low power consumption, reduced material costs, and simplified control, resulting in a compact and environmentally friendly fan system with improved reliability and efficiency.
Implementation Method 1
as the voltage supply VSUPPLY provides a surge voltage that passes through the body diode BD1, a current is generated and flows to the coils (the inductors) L1 to LN. As the current increases, the coils L1 to LN impede the current increase and temporally store the electric energy in the form of magnetic field
Data Source
AI summary
A fan system is electrically connected to a power source, and the fan system includes a power reverse protection apparatus, a voltage regulator, a driver, and a fan. The power reverse protection apparatus, electrically connected to the power source, includes a voltage regulator switch and an activating device. The voltage regulator switch receives an input signal and outputs a first output signal according to the input signal. The activating device is electrically connected to the power source and the voltage regulator switch for receiving the input signal and the first output signal, respectively. The activating device outputs a second output signal to the fan according to the first output signal. The voltage regulator is electrically connected to the power source for receiving the input signal from the power source and outputting a regulating signal according to the input signal. The driver is electrically connected to the voltage regulator for receiving the regulating signal and outputting a driving signal according to the regulating signal. The fan is electrically connected with the driver and the power reverse protection apparatus and operates according to the driving signal and the second output signal.