Layered Motor Controller Layout for Vehicle EMC Shielding
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Solution Overview
Problem
Existing motor controllers for vehicles have poor electromagnetic compatibility (EMC), poor anti-interference ability, and high external radiation intensity, which can affect other vehicle functions.
Innovation Solution
A motor controller with a laminated structure comprising a low-voltage control layer, a driver layer, and a power layer, where the low-voltage control layer and driver layer are separated by an electromagnetic shield, improving EMC and reducing external radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a laminated structure is adopted to reduce overall volume, then the volume of the motor controller is reduced, but electromagnetic compatibility deteriorates and external radiation intensity increases
Solution Approach 1:
The motor controller is divided into three separate layers (low-voltage control layer, driver layer, and power layer) arranged in a laminated structure. Each layer is functionally separated and housed in an independent box, reducing overall volume while maintaining electromagnetic compatibility through physical segmentation of different voltage domains.
Solution Approach 2:
An electromagnetic shield is introduced as an intermediary component between the low-voltage control layer and the driver layer. This shield acts as a mediator to block electromagnetic interference from the high-power driver layer from affecting the sensitive low-voltage control layer, resolving the EMC issue in the laminated structure.
2Volume of moving object
If a laminated structure is adopted to reduce overall volume, then the volume of the motor controller is reduced, but anti-interference ability deteriorates
Solution Approach 1:
The controller is segmented into functionally independent layers with the low-voltage control layer, driver layer, and power layer housed in separate boxes. This segmentation isolates sensitive control circuits from high-power switching circuits, improving anti-interference ability while maintaining a compact laminated overall structure.
Solution Approach 2:
The electromagnetic shield serves as a protective intermediary between the low-voltage control layer and driver layer, blocking harmful electromagnetic interference from reaching the control circuits, thereby enhancing anti-interference ability in the compact design.
3Device complexity
If a laminated structure is adopted, then integration level is improved, but external radiation intensity increases
Solution Approach 1:
The motor controller achieves high integration through a laminated three-layer structure where low-voltage control, driver, and power components are arranged in separate but integrated layers. This segmentation allows each layer to be optimized independently while reducing overall volume and managing electromagnetic radiation through controlled layering.
Solution Approach 2:
The electromagnetic shield acts as a radiation-blocking intermediary between layers, containing electromagnetic interference within the structure and preventing excessive external radiation, thus enabling high integration without compromising electromagnetic environmental compatibility.
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 motor controller achieves a compact structure with enhanced electromagnetic compatibility, strong anti-interference ability, and low external radiation intensity, improving overall vehicle performance.
Implementation Method 1
A part of the box located between the low-voltage control layer and the driver layer is an electromagnetic shield
Data Source
AI summary
A motor controller and a vehicle having the same are disclosed in the present disclosure. The motor controller includes a box, a low-voltage control unit, a driver unit, and a power unit. A low-voltage control layer, a driver layer and a power layer sequentially laminated are defined in the box. The low-voltage control unit is arranged in the low-voltage control layer. The driver unit is arranged in the driver layer. The power unit is arranged in the power layer. A part of the box located between the low-voltage control layer and the driver layer is an electromagnetic shield.