EV Motor Speed Feedback Logic Circuit Replacing CPU
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Solution Overview
Problem
Current motor controllers in electric vehicles rely on central processing chips for feedback signal calculations, leading to slow execution times and increased production costs, which are inadequate for real-time rotational speed control.
Innovation Solution
An electric vehicle motor rotational speed value generating device comprising counters, a frequency divider, and a maximum frequency generator, utilizing logic circuits to perform fast calculations and reduce manufacturing costs by replacing central processing chips and computing hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If central processing chips and computing hardware are used for feedback signal calculations, then the design is simple, but the execution time is long
Solution Approach 1:
The patent replaces the mechanical computing system (central processing chip with compilers and algorithm libraries) with a logic circuit system that performs calculations through hardware logic operations. This substitution enables parallel processing and eliminates software compilation overhead, achieving real-time rotational speed feedback while maintaining design simplicity through standardized logic circuit modules.
2Productivity
If high-end central processing chips are used for fast calculation, then the calculation speed is improved, but the production cost increases
Solution Approach 1:
The patent employs cost-effective logic circuit components and standard counters instead of expensive high-end central processing chips. The logic circuit implementation using affordable hardware elements achieves the required calculation speed for real-time control while significantly reducing production costs, making the system economically viable for mass production in electric vehicles.
3Productivity
If logic circuits are used to replace central processing chips, then the calculation speed is improved, but the device complexity increases
Solution Approach 1:
The patent divides the rotational speed feedback system into segmented functional modules: first counter for frequency division, second counter for exponential function approximation, frequency divider for intermediate calculations, and third counter for final feedback generation. This segmentation allows each module to be independently designed and optimized, managing overall circuit complexity while achieving high-speed parallel processing.
Solution Approach 2:
The logic circuit design uses universal counters and frequency dividers that can handle multiple functions within the rotational speed feedback system. These multi-functional components reduce the total number of specialized circuits needed, thereby managing device complexity while maintaining high calculation speed for real-time motor control.
Data Source
AI summary
An electric vehicle motor rotational speed value generating device comprises: a first counter counting an input frequency according to a system frequency and outputs a first bit numerical value; a second counter receiving the first bit numerical value, the second counter counts the first bit numerical value with an exponent n in a 2n exponential function that approximates a maximum rotational speed command value and outputs a second bit numerical value; a frequency divider receiving the second bit numerical value, and the frequency divider divides the second bit numerical value from the system frequency and outputs a counting frequency; and a third counter receiving the counting frequency, and the third counter is electrically connected to a maximum frequency generator and receives a maximum frequency generated by the maximum frequency generator, and the third counter counts the maximum frequency from the counting frequency and outputs a feedback rotational speed value.