Rotation Detector Control Device Voltage Dividing Circuit
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Solution Overview
Problem
Existing rotation detector technologies require complex circuit structures with multiple switches and capacitors, leading to increased weight, size, and manufacturing costs, while also compromising signal accuracy due to noise and waveform disturbances.
Innovation Solution
A control device for a rotation detector that includes a controller outputting multiple excitation signals, a signal generation unit generating AC signals based on these outputs, and a voltage dividing circuit reducing the voltage of the excitation signals using resistors, allowing for a simpler configuration and improved signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple switches and capacitors are used to generate multiple-stage voltage signals, then signal followability to desired sine wave is improved, but circuit structure becomes complicated and weight/size increases
Solution Approach 1:
The patent extracts only the essential voltage division function from the complex switch-capacitor system, implementing it through a simple resistor-based voltage dividing circuit. This removes unnecessary switches and capacitors while retaining the core functionality of generating multiple-stage voltage signals for improved sine wave followability.
Solution Approach 2:
The patent introduces a resistor-based voltage dividing circuit as an intermediary component between the power source and the excitation coil. This mediator provides the required multiple-stage voltage signals through resistive division, replacing the complex switch-capacitor architecture and reducing overall system complexity.
2Measurement precision
If multiple switches are used for voltage signal generation, then multiple-stage voltage can be achieved, but noise and waveform disturbances increase
Solution Approach 1:
The patent replaces the mechanical switching system with a passive resistive voltage division system. By substituting active switches with passive resistors, the system eliminates switching transients, contact bounce, and associated electromagnetic interference, thereby reducing noise and waveform disturbances while maintaining multiple-stage voltage capability.
3Measurement precision
If complex circuit structure with multiple switches and capacitors is used, then signal accuracy can be improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive, complex switch-capacitor assemblies with inexpensive resistor-based voltage dividers. Resistors are among the cheapest passive components, and the simplified circuit requires fewer precision components, directly reducing manufacturing costs while maintaining the ability to generate accurate multiple-stage voltage signals.
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 solution improves signal accuracy with a simpler configuration, reducing the complexity and cost of the rotation detector while minimizing noise and waveform disturbances.
Implementation Method 1
a voltage dividing circuit that is interposed between the controller and the signal generation unit and decreases the predetermined voltage of the plurality of excitation signals by a resistor to transmit the voltage to the signal generation unit
Data Source
AI summary
A control device of a rotation detector inputs an AC signal to an excitation coil and detects a rotation angle on the basis of a signal obtained by a detection coil. The control device includes: a controller that can output a plurality of excitation signals having a predetermined voltage; and a signal generation unit that generates the AC signal on the basis of the plurality of excitation signals output from the controller. In addition, the control device includes a voltage dividing circuit that is interposed between the controller and the signal generation unit and decreases the predetermined voltage of the plurality of excitation signals by a resistor to transmit the voltage to the signal generation unit.