Battery Magnetic Drill Control for Low-Power Holding
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Solution Overview
Problem
Existing portable drilling machines that use commercial power supplies for electromagnets are limited to areas with power availability, and there is a need to enhance battery-powered drilling machines for extended use and safety while minimizing power consumption.
Innovation Solution
A battery-operated drilling machine with an electromagnet and motor drive unit, controlled by a drive control circuit that manages power to the electromagnet and motor, including features like pulse width modulation, tilt detection, and external power supply integration, to maintain magnetic holding power and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a commercial power supply is used to drive the electromagnet, then the drilling machine can be securely held to the workpiece, but the usage location is limited to areas with commercial power supply
Solution Approach 1:
The invention extracts the power supply function from the fixed commercial power source and relocates it to a portable battery unit that can be removed and recharged separately. This allows the drilling machine to operate independently of commercial power infrastructure while maintaining the electromagnet's holding function.
2Reliability
If the electromagnet is continuously powered to maintain magnetic holding force, then the drilling machine remains securely attached, but battery power is consumed continuously
Solution Approach 1:
The control circuit implements periodic pulsing of the electromagnet rather than continuous power supply. The electromagnet receives intermittent electrical pulses that maintain sufficient magnetic holding force while allowing the battery to recharge during off-periods, thereby reducing overall power consumption.
Solution Approach 2:
The control circuit monitors battery charge level and adjusts electromagnet activation accordingly. When battery charge is sufficient, the electromagnet is activated more frequently to maintain strong holding. When charge is low, activation is reduced to conserve power, creating a feedback loop that balances holding reliability with power conservation.
3Use of energy by moving object
If the electromagnet power is reduced to save battery, then power consumption decreases, but the magnetic holding force becomes insufficient
Solution Approach 1:
The system dynamically adjusts electromagnet power levels based on real-time conditions including battery charge state, operational status, and holding requirements. The control circuit modulates the electromagnet's power input to maintain sufficient holding force during critical operations while reducing power during standby or low-risk periods.
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
The solution allows the drilling machine to operate for extended periods with reduced power consumption, ensures safety by maintaining magnetic hold during power transitions, and supports operation on various surfaces, including non-horizontal positions.
Implementation Method 1
an electromagnet attached to the body unit to securely hold the body unit in a position for a drilling operation by the drilling machine
Data Source
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AI summary
A battery-operated drilling machine (10) has a drilling drive unit (14) having a motor (48) for rotationally driving a drilling tool (44), a drilling machine body unit (12) supporting the drilling drive unit (14) vertically movably, and a battery cover (64) attached to the drilling machine body unit (12). The drilling machine body unit (12) is provided with a battery loading part for accommodating a battery (16). The battery cover (64) is movable between a retracted position and an advanced position relative to the battery (16) loaded in the battery loading part. The battery cover (64) covers at least a part of a gap between the drilling machine body unit (12) and the battery (16) when the battery cover (64) is in the advanced position.