Signal Adjusting Device with Dynamic Termination Resistor
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Solution Overview
Problem
It is challenging to set an optimum resistance value for a termination resistor unit in signal adjusting devices used with position detectors in motor control systems, as the optimal value varies depending on the type of position detector connected, and existing methods require adding, omitting, or changing resistors.
Innovation Solution
A signal adjusting device with a termination resistor unit whose resistance value can be changed based on the type of position detector, using a variable resistor or a combination of fixed resistors and switches, allowing for dynamic adjustment without adding or removing resistors, and incorporating a unit to detect and set the appropriate resistance value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a termination resistor unit with a fixed resistance value is used, then the signal transmission is stable for a specific position detector type, but it cannot be adapted to different position detector types without adding, omitting, or changing resistors
Solution Approach 1:
The patent applies the dynamics principle by making the termination resistor unit adjustable rather than fixed. The resistor unit can dynamically change its resistance value based on the type of position detector connected, allowing the system to adapt to different detector types without physical modification of the resistor configuration.
Solution Approach 2:
The patent implements parameter changes by varying the resistance value of the termination resistor unit according to the position detector type. Instead of changing the physical resistor configuration, the system changes the resistance parameter electronically to match different detector requirements, thereby improving adaptability while maintaining simple hardware architecture.
2Reliability
If the resistance value of the termination resistor unit is changed to match different position detector types, then signal transmission quality is optimized, but additional resistors must be added or existing ones changed
Solution Approach 1:
The patent applies universality by designing a termination resistor unit that can serve multiple functions - it can provide different resistance values for different position detector types using the same physical component. This multi-functional design eliminates the need for multiple dedicated resistors or complex switching networks, thereby improving ease of manufacture while maintaining signal transmission quality.
3Adaptability or versatility
If a variable resistor is used to adjust the resistance value, then adaptability to different position detectors is achieved, but the device complexity increases
Solution Approach 1:
The patent replaces the mechanical approach of using physical resistor networks with electronic control. Instead of mechanically switching between different resistor configurations, the system uses electronic means to adjust the resistance value, thereby reducing mechanical complexity while achieving the same adaptability function.
Data Source
AI summary
A detection signal receiving unit receives, via signal lines, a detection signal output from a position detector which is used in a motor control device. The resistance value of a termination resistor unit is changed to a resistance value determined depending on the type of the position detector in accordance with the received detection signal and the reference value determined depending on the type of the position detector.