Logic Device for RDC to A-B Pulse Conversion
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Solution Overview
Problem
Conventional converting systems for motor position and velocity detection are cumbersome, inflexible, and costly due to large layout area, limited expandability, and reliance on microprocessors, which increases complexity and expense.
Innovation Solution
An electron logic device that converts 16-bit parallel output signals from a Resolver-to-Digital Converter into A-B serial pulses, utilizing a chip with minimal bits as a clock source, a signal-processing pin for control signals, and a logic processing circuit to output rotor displacement and velocity as A-B serial pulses, eliminating the need for a microprocessor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a microprocessor is used in the converting system, then the system can process position and velocity data, but the system complexity and cost increase
Solution Approach 1:
The patent extracts the microprocessor from the system and replaces it with a dedicated logic device that performs only the necessary position and velocity conversion functions. This removes the complexity of a general-purpose processor while maintaining the essential automated processing capability through specialized hardware logic circuits.
Solution Approach 2:
The patent replaces the expensive microprocessor with a simpler, more cost-effective logic device that performs the specific RDC output transformation functions. This substitution reduces system cost while maintaining the necessary processing capabilities through dedicated hardware implementation.
2Extent of automation
If a microprocessor is used in the converting system, then the system can perform data processing, but the system cost increases
Solution Approach 1:
The patent replaces the expensive microprocessor with a simpler, more cost-effective logic device that performs the specific RDC output transformation functions. This substitution reduces system cost while maintaining the necessary processing capabilities through dedicated hardware implementation.
3Ease of manufacture
If traditional converting circuits are used, then the system can convert RDC output, but the circuit board occupation area increases
Solution Approach 1:
The patent merges the position and velocity conversion functions into a single integrated logic device that processes RDC output directly. This consolidation integrates multiple functions into one compact unit, significantly reducing the circuit board area required compared to traditional separate converting circuits.
4Ease of manufacture
If traditional converting system is used, then the system can process position data, but the system lacks expandability
Solution Approach 1:
The patent designs a logic device with universal input interfaces that can accommodate different RDC types and configurations. The device provides multiple output options including A-B pulses, quadrature waves, and other formats, making it adaptable to various motor control applications and enhancing system expandability without requiring redesign.
Data Source
AI summary
A logic device for the transformation of the output of the RDC into series A-B pulses according to the present invention comprises: a chip with its two minimal bits (LSB-LSB-1) simulating as the clock source of A-B pulses, a signal-processing pin (BUSY) which output a TTL pulse wave as a control signal resource while LSB shifts from a low level to a high level and contrariwise, and a logic processing circuit as well as a buffer to output the displacement and velocity of a rotor in the form of A-B serial pulses.