Inter-vehicle Pulse Transformer Oxide Film Breakthrough
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Solution Overview
Problem
Conventional inter-vehicle signal transfer systems experience signal degradation due to the transformer acting as a resistor component when connected via a capacitor, leading to contact failures and oxide film formation on electrical couplers.
Innovation Solution
An inter-vehicle transfer apparatus utilizing a pulse transformer with auxiliary coils and a direct-current power supply, connected in series with load resistance and switches, to apply a direct-current voltage across contact portions, breaking the oxide film while minimizing signal quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a direct-current voltage supply and transformer are connected via a capacitor to break oxide films, then contact reliability is improved, but signal quality deteriorates due to transformer acting as a resistor component
Solution Approach 1:
The patent divides the transformer into multiple independent coils (first coil, second coil, first auxiliary coil, second auxiliary coil) with specific winding directions and turn ratios. This segmentation allows each coil to perform specialized functions: some coils generate magnetic fields for oxide film breakdown while others compensate for magnetic saturation, thereby resolving the contradiction between contact reliability and signal quality.
Solution Approach 2:
The patent employs asymmetric coil configurations where auxiliary coils are wound in opposite directions to the main coils, and with different turn ratios. This asymmetry enables the auxiliary coils to generate counteracting magnetic fields that prevent saturation while allowing the main coils to effectively break oxide films, thus maintaining both contact reliability and signal quality.
2Reliability
If direct-current voltage is applied across contact portions to break oxide film, then contact reliability is improved, but magnetic saturation occurs causing signal degradation
Solution Approach 1:
The patent applies preliminary anti-action by introducing auxiliary coils that generate magnetic fields in opposite directions to the main coils before magnetic saturation can occur. These auxiliary coils preemptively counteract the magnetic field buildup, preventing saturation while allowing the direct-current voltage to effectively break oxide films on contact portions.
Solution Approach 2:
The patent changes the magnetic field parameters by using auxiliary coils with different turn ratios and opposite winding directions. This parameter change allows the system to maintain the high current needed for oxide film breakdown while simultaneously controlling the magnetic field strength to prevent saturation, thus resolving the contradiction between contact reliability and signal integrity.
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
Effectively breaks the oxide film on contact portions of electrical couplers, maintaining signal quality by canceling magnetic fields and preventing saturation, thus ensuring reliable communication.
Implementation Method 1
a pulse transformer including a first coil (17a) wound around a core (13a), and a first end of which is connected at one end to the electrical coupler (52), a capacitor (18), a first end of which is connected to a second end of the first coil (17a), and a second coil (17b) wound around the core (13a) in a same direction as the first coil (17a), wherein a first end of the second coil (17b) is connected a second end of the capacitor (18), and wherein a second end of the second coil (17b) is connected to the electrical coupler (52)
Implementation Method 2
a first auxiliary coil (19a) wound around the core (13a) in an opposite direction to the first and second coils (17a, 17b) and having an equal number of turns as the first coil (17a), and wherein a first end of the first auxiliary coil (19a) is connected to a second end of the first coil (17a); and a second auxiliary coil (19b) wound around the core (13a) in an opposite direction to the first and second coils (17a, 17b) and having an equal number of turns as the second coil (17b)
Data Source
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AI summary
An inter-vehicle transfer apparatus mounted in a vehicle 50 includes a pulse transformer 13 and auxiliary coils 19a and 19b. The pulse transformer 13 includes a coil 17a wound around a core 13a and connected at one end to an electrical coupler 52; a capacitor 18 connected at one end to the other end of the coil 17a; and a coil 17b wound around the core 13a in the same direction as the coil 17a, connected at one end to the other end of the capacitor 18, and connected at the other end to the electrical coupler 52. The auxiliary coil 19a is connected at one end to the coil 17a. The auxiliary coil 19b is connected at one end to the coil 17b. In the inter-vehicle transfer apparatus mounted in the vehicle 50, the other end of the auxiliary coil 19a and the other end of the auxiliary coil 19b are connected each other to enable application of a direct-current voltage across contact portions in the electrical coupler 52.