Electric Motor Brake Driver Structure for Damped Torque Transfer
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Solution Overview
Problem
Conventional brake motors face challenges in achieving precise angle detection of the rotor shaft due to torque jerks and interference effects during operation, which can impact the accuracy and robustness of angle sensors.
Innovation Solution
A brake assembly for electric motors featuring a driver with inner and outer parts connected via an intermediate layer, allowing for torsional fixation and axial displacement, which introduces torque jerks in a damped form, and includes a magnetic body, armature disk, and bushings to dampen impacts and protect angle sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional brake assembly is used, then the brake can be actuated electromagnetically, but torque jerks and interference effects prevent precise angle detection of the rotor shaft
Solution Approach 1:
The driver is divided into an inner driver part and an outer driver part, connected through an intermediate layer. This segmentation allows the intermediate layer to dampen torque jerks while maintaining torsional connection, enabling precise angle detection by isolating the sensor from harmful mechanical interference.
Solution Approach 2:
An intermediate layer is introduced between the inner and outer driver parts to act as a mediator that dampens torque jerks and interference effects. This intermediate element protects the angle sensor from harmful mechanical fluctuations while allowing the brake assembly to function electromagnetically.
2Object-generated harmful factors
If the driver is made as a single rigid part, then torsional connection is strong, but torque jerks and impacts cannot be damped
Solution Approach 1:
The driver is constructed as a composite structure with an inner driver part, an intermediate layer, and an outer driver part. This composite design combines the strength of rigid metal parts with the damping properties of the intermediate layer, achieving both torsional connection strength and torque jerk dampening.
Solution Approach 2:
The intermediate layer is pre-positioned between the inner and outer driver parts to provide beforehand cushioning against torque jerks and impacts. This preventive damping structure protects the angle sensor from harmful mechanical effects before they can cause interference.
3Object-generated harmful factors
If the intermediate layer is made softer for better damping, then torque flows are damped, but the connection between driver parts may become less rigid
Solution Approach 1:
The intermediate layer is designed with specific local properties - soft enough to dampen torque flows and protect the angle sensor, yet configured to maintain adequate connection rigidity. The local quality of the intermediate layer is optimized to balance damping performance with connection stability.
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
Enables precise and robust angle detection of the rotor shaft by damping torque and impact effects, reducing interference and ensuring reliable operation of the electromagnetically actuable brake.
Implementation Method 1
The intermediate layer is able to be given a more elastic and/or a softer configuration than the two driver parts. It is therefore possible to achieve a damping of force flows and/or torque flows transmitted through the intermediate layer.
Implementation Method 2
the intermediate layer is able to be given a more elastic and/or a softer configuration than the two driver parts
Implementation Method 3
significant protection for an angle sensor situated on the motor is achieved, in particular a sensor shaft connected to the rotor shaft in a torsionally fixed manner
Data Source
AI summary
A brake assembly for an electric motor includes: a brake pad plate, a driver, and a shaft. The driver includes an inner driver part and an outer driver part, which are connected to one another by an intermediate layer, the brake pad plate having an inner tooth system, which meshes with an outer tooth system of the outer driver part so that the brake pad plate is connected to the driver in a torsionally fixed but axially displaceable manner, the inner driver part being connected to the shaft in a torsionally fixed manner.