Brushless Fastener Driver Power Control for Low Battery Operation
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Solution Overview
Problem
Cordless battery-powered fastener drivers often operate at a consistent speed and power consumption, which can be inefficient when power sources have reduced capacity or performance, limiting their operational life.
Innovation Solution
A fastener driver with a brushless motor and electronic controller that adjusts power consumption based on battery parameters, switching to a reduced power mode when thresholds are exceeded to extend operational life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fastener driver operates at consistent speed and power consumption, then the driving speed is maintained, but the operational life is limited when battery capacity is reduced
Solution Approach 1:
The fastener driver dynamically adjusts its operating parameters by switching between first and second operating modes based on battery capacity. The controller monitors battery status and automatically transitions from high-power first mode to energy-saving second mode when battery capacity falls below a threshold, optimizing the balance between driving speed and operational duration
Solution Approach 2:
The system changes operational parameters (power consumption level) based on battery capacity conditions. When battery capacity is sufficient, the driver operates in first mode with higher power consumption for faster driving. When battery capacity drops below the threshold, it switches to second mode with reduced power consumption to extend operational life
2Duration of action of moving object
If the fastener driver uses reduced power mode, then the operational life is extended, but the driving speed is reduced
Solution Approach 1:
The system dynamically adapts its performance characteristics based on real-time battery capacity monitoring. The controller automatically adjusts the motor power output by switching between operating modes, allowing the fastener driver to maintain optimal speed when battery capacity is high and conserve energy when battery capacity is low, thereby extending operational life while minimizing speed impact
3Duration of action of moving object
If the fastener driver monitors battery parameters and adjusts power consumption, then the operational life is extended, but the device complexity increases
Solution Approach 1:
The controller implements a feedback mechanism by continuously monitoring battery capacity and automatically adjusting the operating mode accordingly. This closed-loop control system extends operational life by reducing power consumption when battery capacity is low, while keeping the control logic relatively simple through predefined threshold-based mode switching
Solution Approach 2:
The fastener driver monitors its own battery status and autonomously adjusts its power consumption without requiring external intervention. The controller automatically determines when to switch between operating modes based on battery capacity, enabling the device to self-optimize its operational life while minimizing 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
Extends the operational life of the fastener driver by reducing power consumption when battery capacity is low, ensuring consistent operation and increased battery usage.
Implementation Method 1
a brushless motor including a rotor and a stator and configured to produce a rotational output to the drive mechanism
Data Source
AI summary
A device may include a housing, a drive mechanism disposed within the housing, and a brushless motor within the housing. The brushless motor includes a rotor and a stator and is configured to produce a rotational output to the drive mechanism. The device may further include a battery pack interface configured to couple to a battery pack and an electronic controller electrically coupled to the drive mechanism and the battery pack interface, and configured to determine an operating mode of the fastener driver, monitor a parameter of the battery pack coupled to the battery pack interface, in response to determining that the operating mode is a first operating mode, determine whether the monitored parameter exceeds a predetermined threshold, and adjust a power consumption of the motor in response to determining that the operating mode is the first operating mode and the monitored parameter exceeds the predetermined threshold.