Electric Braking Device Dual Power Source Segmentation
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Solution Overview
Problem
Existing electric braking devices for vehicles require thick power lines to minimize voltage drop, making them inflexible and inefficient in terms of energy usage and initial responsiveness.
Innovation Solution
The electric braking device incorporates both a body power source and a vehicle wheel power source, allowing the control system to selectively use either source to supply power to the electric motor, reducing the load on power lines and enabling the use of thinner wires, and includes a control mechanism to manage power distribution based on braking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thick power lines are used to minimize voltage drop, then power transmission efficiency is improved, but flexibility of the power lines deteriorates
Solution Approach 1:
The power supply system is segmented into two independent power sources: body power source (BBD) and vehicle wheel power source (BWH). This segmentation allows the power lines to be thinner since each power source only needs to supply partial power, resolving the contradiction between power transmission efficiency and flexibility.
Solution Approach 2:
The patent introduces a new dimension of power supply architecture by adding a vehicle wheel side power source, transforming the single-power-source system into a dual-power-source system. This dimensional change enables the use of thinner, more flexible power lines while maintaining adequate power delivery.
2Device complexity
If power is supplied from body power source only, then device complexity is reduced, but initial responsiveness of braking deteriorates
Solution Approach 1:
The vehicle wheel power source (BWH) is pre-positioned at the vehicle wheel side and can immediately supply power without waiting for power transmission from the body side. This preliminary positioning of power supply capability resolves the contradiction by enabling instant response while keeping the overall system relatively simple.
Solution Approach 2:
The vehicle wheel power source acts as an intermediary that provides immediate local power supply, bridging the gap between the body power source and the electric motor. This intermediary power source enables fast initial responsiveness while the body power source continues to provide sustained power.
3Force
If energy is accumulated in coil spring before braking, then braking torque can be increased, but energy saving deteriorates
Solution Approach 1:
The vehicle wheel power source (BWH) serves itself by providing immediate power for braking without requiring pre-charging of mechanical springs. This self-service capability eliminates the need for energy-intensive pre-charging operations while still delivering high braking torque when needed.
Solution Approach 2:
The patent replaces the mechanical spring-based energy storage system with an electrical power source (BWH) located at the vehicle wheel side. This substitution eliminates the need for mechanical pre-charging while providing immediate electrical power for braking, resolving the contradiction between braking torque and energy saving.
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
This configuration enhances the flexibility of power lines, improves energy efficiency, and ensures reliable braking torque reduction when the body power supply is inadequate, while maintaining initial responsiveness.
Implementation Method 1
an electric motor (MTR) disposed on a vehicle wheel (WHL) side of the vehicle, a friction member (MSB) which presses the rotating member (KTB) by using drive torque of the electric motor (MTR) to generate braking torque
Implementation Method 2
a rotational position of a spindle rotating by using drive torque of an electric motor when a friction member is pressed against a rotating member fixing to a wheel of a vehicle is turned back by a predetermined angle in an opposite direction of a side to which braking torque is applied by elastic force of a coil spring
Data Source
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AI summary
This electric braking device uses drive torque of an electric motor (MTR) to push a friction member against a rotating member secured to a vehicle wheel and produce braking torque in the vehicle wheel. This device comprises a body power source (BBD) for electric motor power supply secured to a body of the vehicle, and a vehicle wheel power source (BWH) for electric motor power supply secured to the vehicle wheel. The body power source (BBD) supplies power to the vehicle wheel power source (BWH) via a first electric path (PBD+PWH), and the vehicle wheel power source (BWH) supplies power to the electric motor (MTR) via a second electric path (PWH). When braking torque is produced in the vehicle wheel, the electric motor (MTR) is normally driven using the vehicle wheel power source (BWH). An electric braking device is thereby provided in which a power line electrically connecting the body side and the vehicle wheel side bends readily.