Hall Effect Accelerator Module for Electric Vehicles
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Solution Overview
Problem
Existing accelerator modules for electric vehicles are prone to physical wear due to contact between wiping elements and resistance components, leading to potential reliability issues over time.
Innovation Solution
An accelerator module utilizing a rotor actuator with a magnet and a Hall Effect chip to produce a variable voltage output, where the magnet rotates across the Hall Effect sensor, generating a voltage proportional to the rotation, thus controlling vehicle acceleration and deceleration without direct contact, housed in a waterproof enclosure with a torsion spring and seal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If variable resistance mechanisms with wiper elements are used, then the accelerator module can generate electrical signals proportional to pedal position, but the contact between wiper elements and resistance elements causes physical wear over time
Solution Approach 1:
The patent replaces the mechanical contact-based variable resistance mechanism with a magnetic field-based Hall effect sensor system. The rotor actuator with magnet interacts with the Hall effect chip through magnetic field changes, eliminating physical contact between moving parts. This substitution of mechanical contact with magnetic field interaction resolves the wear problem while maintaining the ability to generate position-proportional electrical signals.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the rotor actuator and the Hall effect chip. Instead of direct mechanical contact, the magnet on the rotor actuator creates magnetic field variations that are detected by the Hall effect sensor, which then converts these field changes into electrical signals. This intermediary magnetic field transmission mechanism eliminates wear while preserving signal generation functionality.
2Measurement precision
If contact-based wiper elements are used, then the accelerator module can provide position feedback, but the physical contact leads to susceptibility to wear following extensive usage
Solution Approach 1:
The patent replaces the mechanical wiper-resistance contact system with a magnetic field-based detection system. The Hall effect chip detects magnetic field strength variations caused by the rotating magnet, converting these variations into position information. This non-contact magnetic field measurement approach maintains position detection precision while eliminating the wear inherent in mechanical contact systems.
Solution Approach 2:
The patent changes the measurement parameter from mechanical contact resistance to magnetic field strength. Instead of measuring resistance changes through physical contact, the system measures magnetic field strength variations as the magnet rotates. This parameter change from mechanical to magnetic measurement enables precise position detection without physical wear.
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 reduces wear and enhances reliability by eliminating direct contact between moving parts, providing a durable and efficient means of controlling electric vehicle acceleration and deceleration, while maintaining a waterproof and protected module design.
Implementation Method 1
The apparatus also employs a Hall Effect chip configured to produce a variable voltage output in proportion to the relative locations of the magnet and the Hall Effect chip
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
An accelerator module for an electric vehicle, including a rotor actuator designed to hold a magnet in one end and to provide a drive interface with the vehicle at the other end. The accelerator module employs a Hall Effect chip configured to produce a variable voltage output in proportion to the relative locations of the magnet and the Hall Effect chip, such that when the rotor actuator is caused to rotate, the magnet is rotated across the Hall Effect chip. The Hall Effect chip includes a Hall Effect sensor, which senses differences in magnetic fields. When the magnet is passed across the Hall Effect sensor, the magnetic field will change in proportion to the amount of rotation of the rotor actuator. The variable voltage produced by the Hall Effect chip may then be translated into variable acceleration for the vehicle.