Motor Control Circuit Using Multiple Sensor Chips for Current Distribution
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Solution Overview
Problem
Conventional motor control circuits with a single sensor chip cannot handle high-speed or large-size motors due to the high current requirements, leading to increased costs and reliability issues, as typical sensor chips cannot withstand the necessary currents.
Innovation Solution
A control circuit with multiple sensor chips, each controlling a part of the winding sets, allowing for reduced current requirements per chip and providing redundancy in case of chip failure, enabling the use of lower-cost sensor chips in high-speed or large-size motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sensor chip is used to control the winding sets, then the control circuit structure is simple, but the sensor chip cannot withstand the high current required for high-speed or large-size motors
Solution Approach 1:
The patent divides the control circuit into multiple sensor chips, with each sensor chip controlling a subset of winding sets. This segmentation allows the current load to be distributed across multiple chips, enabling each chip to withstand the reduced current while collectively controlling the entire motor system.
2Reliability
If a sensor chip with higher current withstanding ability is used, then high-speed or large-size motors can be controlled, but the cost of the sensor chip increases
Solution Approach 1:
By segmenting the control function across multiple standard sensor chips, the patent avoids the need for expensive high-current-capable sensor chips. Each standard chip operates within its current rating, making the overall system cost-effective while maintaining the ability to control high-speed or large-size motors.
Solution Approach 2:
The patent uses multiple copies of standard sensor chips instead of a single specialized high-current chip. This approach leverages the availability and lower cost of standard chips while achieving the required current handling capability through parallel operation.
3Reliability
If a single sensor chip controls all winding sets, then the control circuit is simple, but the motor cannot operate continuously when the sensor chip fails
Solution Approach 1:
The control circuit is segmented into multiple independent sensor chip modules, where each module controls a portion of the winding sets. This modular structure enables redundancy, as the failure of one sensor chip does not incapacitate the entire system, allowing continuous operation with reduced functionality.
Solution Approach 2:
The patent incorporates redundant sensor chips in advance, so that if one chip fails, another can take over its function. This beforehand cushioning ensures operational continuity and prevents complete system failure, enhancing reliability without requiring complex real-time failure detection and recovery mechanisms.
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
This solution allows for the adaptation of low-current sensor chips to high-speed or large-size motors by distributing current loads and providing backup functionality, ensuring continuous operation even if one sensor chip fails.
Implementation Method 1
The sensor chip 131 senses magnetic properties of the magnetic poles of the rotor to change the directions of the currents flowing through the first winding L1 and the second winding L2
Implementation Method 2
make the winding sensing arms generate magnetic forces to push the rotor 11 to rotate
Data Source
AI summary
A control circuit of a motor includes at least two sensor chips and at least two winding sets. The sensor chips are electrically connected to each other, and each of the winding sets has a first winding and a second winding. The first end of the first windings and the first end of the second windings are electrically connected to each other, and the second end of the first windings and the second end of the second windings are electrically connected to the sensor chips correspondingly. In addition, a motor having the control circuit is also disclosed.