Electric Machine Tool Starting Inhibitor Electronics Unit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric machine tools with restarting lockouts consume power continuously to detect operating voltage, leading to battery discharge when idle, especially when using battery packs as the power source.
Innovation Solution
An electronics unit in the electric machine tool is configured to receive power only for a limited time after connection, using a detection unit to generate a temporary indicator signal for evaluating the switch position and preventing startup, thus minimizing power consumption and preventing undesired starting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronics unit is continuously connected to the power source to detect operating voltage for the starting lockout function, then the reliability of preventing undesired startup is improved, but the power consumption increases causing battery discharge
Solution Approach 1:
The electronics unit is powered only during a limited time period after connection is established, rather than continuously. The detection unit activates periodically to check for operating voltage and set the indicator signal, then enters idle state. This periodic operation maintains the starting lockout reliability while dramatically reducing power consumption during idle states.
Solution Approach 2:
The power supply to the electronics unit is extracted and limited to only the necessary time period for detecting operating voltage. The detection unit is separated into a distinct component that only operates when needed, allowing the main electronics unit to remain inactive and conserve battery power while still performing the critical voltage detection function.
2Object-affected harmful factors
If the detection unit continuously monitors operating voltage to prevent undesired startup, then the safety of the machine tool is improved, but the battery pack experiences creeping discharge
Solution Approach 1:
The detection unit performs the voltage detection action preliminarily and immediately after connection is established, setting the indicator signal before the starting lockout period begins. This preliminary detection ensures that if voltage is present, the lockout is activated in time, preventing undesired startup while avoiding continuous monitoring that would cause battery discharge.
Solution Approach 2:
The indicator signal is implemented as a temporary, short-lived state rather than a continuous monitoring process. The detection unit creates a brief indicator signal that suffices for the starting lockout function, eliminating the need for continuous energy-consuming monitoring while maintaining safety against undesired startup.
Data Source
AI summary
In an electric machine tool having an electronics unit for implementing a starting lockout, the electric machine tool being connectable to an associated power source in an electrically conductive manner, the electronics unit is configured to receive power from the power source only for a limited, predefined period of time after an electrically conductive connection between the electric machine tool and the power source has been established.