Adaptive Power Control for Cordless Fastening Tool Efficiency
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Solution Overview
Problem
Power nailers in construction trades lack flexibility due to the presence of hoses and cables, limiting user freedom and efficiency.
Innovation Solution
A driving tool with a motor assembly and electrical power source, where the driver is movable along an axis, and the motor assembly includes a motor and output member to transmit power, with adaptive control of power cycles based on rotational speed to optimize operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power delivery is increased to improve driving speed, then productivity increases, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the power delivery variable rather than constant. The controller dynamically adjusts the motor assembly's power output based on real-time detection of driver position and driving conditions, enabling the system to optimize the balance between driving speed and energy consumption throughout the driving cycle.
Solution Approach 2:
The patent implements feedback control by detecting the driver's position and operational parameters, then using this information to adjust power delivery. The controller continuously monitors driving conditions and modifies power output accordingly, creating a closed-loop system that responds to actual operating conditions.
2Use of energy by moving object
If adaptive power control is implemented to optimize energy usage, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it controls motor power delivery, detects driver position, monitors operational parameters, and adjusts power output based on driving conditions. By consolidating these diverse functions into a single controller unit, the patent reduces overall system complexity while achieving adaptive energy optimization.
Solution Approach 2:
The system performs self-adjustment by automatically detecting its own operational state and modifying power delivery without external intervention. The controller monitors driver position and driving conditions, then autonomously optimizes power output, eliminating the need for complex external control systems.
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
Enhances user flexibility and efficiency by adjusting power delivery based on rotational speed, ensuring optimal performance and energy usage.
Implementation Method 1
a motor assembly including a motor and an output member, that is driven by the motor and employed to transmit power to the driver
Implementation Method 2
determining a first parameter, the first parameter being related to the back electromotive force that is generated by the motor
Data Source
AI summary
A power tool for operating on a workpiece, the power tool having a housing and a motor disposed within the housing. A controller is connected to the motor and receives user inputs for turning on the motor and a power tool battery pack is connected to the controller and the motor. At least one light is connected to the controller for illuminating the workpiece. The controller can turn on the light in a predetermined pattern to alert the user to a tool condition, such as the charge level being below a predetermined level.