Pump Electronics Thermal Management via Potting
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Solution Overview
Problem
Current pump electronics for centrifugal pumps face challenges in efficiently managing heat dissipation and electromagnetic interference (EMI) due to the complex distribution of heat-generating and interference-producing components, which increases manufacturing costs and reduces design flexibility.
Innovation Solution
Embedding heat-generating components like chokes and semiconductor switches, along with the printed circuit board, in a thermally conductive and electrically insulating potting compound within the electronics housing, thereby integrating shielding and cooling directly at the point of origin, forming a compact, functionally integrated assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components are distributed on circuit boards with different assembly processes (THT/SMD), then design flexibility is maintained, but manufacturing complexity and cost increase due to multiple individual cooling and shielding measures
Solution Approach 1:
The patent combines multiple individual cooling and shielding measures into a single integrated housing structure. The housing serves simultaneously as the mechanical enclosure, the electromagnetic shield, and the heat dissipation component, eliminating the need for separate shielding plates and individual heat sinks for each component.
Solution Approach 2:
The housing is designed to perform multiple functions: it provides mechanical protection, electromagnetic shielding, and thermal management. This multi-functional approach replaces the traditional separate components (shielding plates, individual heat sinks, mounting brackets) with a single universal structure.
2Object-affected harmful factors
If a large-area electromagnetic shielding is used to cover all components, then EMI protection is improved, but installation space increases and design freedom is restricted
Solution Approach 1:
The electromagnetic shielding function is merged into the housing structure itself rather than being added as a separate large-area shield. The housing walls act as the shield, eliminating the need for additional shielding space.
Solution Approach 2:
The shielding function is extracted from the concept of a separate shielding plate and integrated into the housing structure. This removes the need for additional space dedicated to separate shielding components.
3Temperature
If multiple individual heat sinks are used for each heat-generating component, then cooling effectiveness is maintained, but manufacturing effort and costs increase
Solution Approach 1:
Multiple individual heat sinks are merged into a single integrated housing structure that provides thermal management for all components. The housing itself acts as a large heat sink with thermal contact to multiple heat-generating components through direct mounting or thermal interfaces.
Solution Approach 2:
The housing serves as a universal heat sink for all heat-generating components, replacing the need for component-specific heat sinks. This single structure provides thermal management for chokes, semiconductor switches, and other heat-generating elements.
4Temperature
If a holistic cooling solution with a very large heat sink is used, then all components are cooled, but the heat sink is oversized and costs increase
Solution Approach 1:
Instead of a uniformly oversized heat sink, the housing provides localized thermal management where needed. Heat-generating components are mounted directly on or in thermal contact with the housing walls, which act as heat sinks at those specific locations, rather than requiring a large uniform heat dissipation structure.
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 approach enhances heat dissipation and EMI shielding effectiveness, reduces the need for additional cooling and shielding components, saves installation space, and increases the efficiency of the pump electronics by eliminating temperature-dependent power limitations.
Implementation Method 1
embedding heat-generating components like chokes and semiconductor switches, along with the printed circuit board, in a thermally conductive and electrically insulating potting compound
Implementation Method 2
the components, i.e. at least one choke and semiconductor switch, together with the printed circuit board, are embedded in a thermally conductive and electrically insulating potting compound and together form a potting body that is arranged inside the electronics housing, with the shielding is integrated into the potting body
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The invention relates to pump electronics (1) of an electrically driven centrifugal pump with an electronics housing (2) in which control and/or regulation electronics with a frequency converter for speed control of the centrifugal pump are arranged, wherein the control and/or regulation electronics comprise at least one printed circuit board (5) with electrical and/or electronic components (6, 7, 8) comprising at least one choke (6) and semiconductor switches (7, 8) and surrounded by an electromagnetic shield (10, 13, 14). The components (6, 7, 8) together with the printed circuit board (5) are embedded in a thermally conductive potting compound (4) and together form a potting body (3) which is arranged within the electronics housing (2), wherein the shield (8) is integrated into the potting body (3).