Actuator Drive Circuit Layout for EMC Without Extra Ground Wiring
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Solution Overview
Problem
Existing drive circuits for actuator devices in motor vehicles face limitations in electromagnetic compatibility, leading to interference issues that affect sensor signals and require complex signal processing, despite the use of EMC circuits.
Innovation Solution
The drive circuit is optimized with an interference suppression branch featuring obliquely oriented conductor branches and a contact tongue that uses the actuator housing as zero-ground potential, eliminating the need for an external ground conductor, thereby enhancing electromagnetic compatibility and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If EMC circuits are used in the drive circuit, then electromagnetic interference suppression is improved, but the device complexity increases and structural limits are reached
Solution Approach 1:
The patent changes the geometric parameters of the conductor tracks, specifically their spatial orientation and arrangement. The conductor tracks are arranged in a three-dimensional configuration with specific angles and positions that inherently suppress electromagnetic interference without requiring additional EMC circuit components. This geometric parameter optimization provides interference suppression at the structural level rather than through complex circuitry.
Solution Approach 2:
The patent replaces the electrical/electronic EMC circuit approach with a geometric/mechanical arrangement of conductor tracks. Instead of using electronic components and complex circuit designs to suppress interference, the solution uses the physical spatial configuration of the conductor tracks themselves to achieve interference suppression, substituting an electronic system with a geometric structure.
2Object-affected harmful factors
If conventional conductor track arrangement is used, then manufacturing is simplified, but electromagnetic interference suppression is insufficient
Solution Approach 1:
The patent modifies the geometric parameters of the conductor tracks including their three-dimensional positioning, angles of inclination, and spatial separation. These parameter changes create an arrangement that suppresses electromagnetic interference while still being manufacturable using standard processes, achieving a balance between performance and ease of manufacture.
3Measurement precision
If complex signal processing is used to handle distorted sensor signals, then measurement accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent applies preliminary anti-action by suppressing electromagnetic interference at its source through the geometric arrangement of conductor tracks, before the interference can distort sensor signals. This preventive measure ensures that sensor signals remain clean and accurate without requiring complex signal processing to correct distortions, thereby maintaining measurement precision while avoiding additional processing complexity.
Data Source
AI summary
The present disclosure describes a drive circuit for an actuator of an actuator device. The drive circuit includes an interference suppression branch for reducing interferences. The interference suppression branch includes two conductor branches extending along a longitudinal axis and each comprising at least one conductor body. The two conductor branches extend through at least two imaginary conductor alignment sections of the interference suppression branch that are lined up in a row in an axial direction of the longitudinal axis. The two conductor branches have a first portion arranged inside a first conductor alignment section that run obliquely towards one another.