Control device and electric power tool system
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Solution Overview
Problem
Existing electric power tools are cumbersome due to integrated battery packs, making them difficult to carry and operate, especially for fine tasks, and lack user-friendly control mechanisms.
Innovation Solution
A control device separates the battery pack from the power tool, connected via a cable, allowing the tool to be lightweight and portable, with user controls integrated into the control device for improved maneuverability and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor controller determines a high probability of foreign object intrusion based on abnormal current increase, then the motor is stopped to ensure safety, but this causes unnecessary interruptions during normal high-load operation
Solution Approach 1:
The control device continuously monitors motor current and uses feedback mechanisms to distinguish between abnormal foreign object intrusion and normal high-load operation. The determination unit analyzes current patterns over time and compares them against thresholds to make informed decisions about whether to stop the motor, reducing false positives while maintaining safety.
Solution Approach 2:
The control system dynamically adjusts its response based on real-time current characteristics. Instead of a fixed threshold approach, the system adapts its detection sensitivity based on the motor's operating state, allowing it to differentiate between transient high-current normal operation and sustained abnormal current indicating foreign object intrusion.
2Reliability
If the control device waits for current to return to normal before resuming motor operation, then safety is maintained, but productivity is reduced due to extended停机 time
Solution Approach 1:
The control device performs preliminary assessment of the current abnormality pattern before initiating motor shutdown. By evaluating whether the current increase matches foreign object intrusion characteristics versus normal load patterns, the system avoids unnecessary shutdowns and reduces停机 time when no actual hazard exists.
Solution Approach 2:
When the determination unit confirms foreign object intrusion with high probability, the system rapidly executes shutdown and recovery procedures. The control device minimizes the duration of motor停机 by promptly resuming operation once current returns to normal, reducing the overall loss of time while maintaining safety protocols.
3Productivity
If the motor operates at high output during startup, then productivity is improved, but the risk of foreign object intrusion and abnormal current increase is amplified
Solution Approach 1:
The control device maintains continuous monitoring of motor current throughout the entire startup and operation phases. This uninterrupted surveillance enables real-time detection of abnormal current patterns that may indicate foreign object intrusion, allowing the system to safely operate at high output while promptly responding to hazards.
Solution Approach 2:
The system replaces purely mechanical or fixed-threshold current protection with an intelligent control system that uses electronic sensing and algorithmic determination. The determination unit analyzes current patterns to distinguish between beneficial high-output operation and dangerous foreign object intrusion, enabling high productivity while reducing false hazard detection.
Data Source
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AI summary
A control device and an electric power tool system. The control device is used for being adapted to various eelectric power tools, and the control device comprises: a first shell; a battery pack mounting part; a first control unit, which is provided in the first shell and is used for cutting off power transmission from a battery pack to an electric power tool when the battery pack is abnormal; a first user operation unit, which is arranged on the first shell and is operated by a user to control the electric power tool; and a first interface, electrically connected to the first user operation unit. The electricpower tool system comprises the control device and the electric power tool. The control device can be adapted to different types of electric power tools, and the control device in the electric power tool system is not provided with a control portion used for adjusting working parameter of the electric power tool, such that the control device can more flexibly match an upgraded new electric power tool, the application range is improved, and the applicability is high.