Inverter Compressor Coil Mounting Vertical Space
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Solution Overview
Problem
Integrated-inverter electric compressors face challenges in achieving size reduction and compactness due to the need for a common mode coil, which requires increasing the planar area of the inverter accommodating section, hindering optimal arrangement of other electrical components.
Innovation Solution
The design incorporates an outward extending portion on the cylindrical housing, allowing the common mode coil to be installed below the terminal block, maintaining the same planar area without increasing the inverter accommodating section's size, and optimizing the arrangement of high-voltage components for reduced noise and improved compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a common mode coil is installed in the inverter accommodating section, then common mode noise is reduced, but the planar area of the inverter accommodating section must be increased
Solution Approach 1:
The patent extends the inverter accommodating section in the vertical direction by providing an outward extending portion that protrudes from the cylindrical housing. This allows the common mode coil to be installed in a downwardly extending space below the terminal block, utilizing the third dimension (vertical depth) rather than increasing the planar area. The coil installation site is formed by this outward extending portion, enabling three-dimensional spatial arrangement of components.
2Object-affected harmful factors
If the inverter accommodating section is enlarged to accommodate a common mode coil, then common mode noise is reduced, but the compactness and mountability of the electric compressor are degraded
Solution Approach 1:
The outward extending portion creates a downwardly extending coil installation site that utilizes vertical space. This three-dimensional arrangement allows the common mode coil to be accommodated without increasing the overall footprint or planar dimensions of the compressor, thereby maintaining compactness and vehicle mountability while still incorporating the noise-reducing common mode coil.
3Object-affected harmful factors
If the inverter accommodating section is enlarged to accommodate a common mode coil, then common mode noise is reduced, but the arrangement of other electrical components is compromised
Solution Approach 1:
The patent creates a multi-level spatial arrangement where the terminal block is positioned in the upper portion of the outward extending portion and the common mode coil is positioned in the downwardly extending space below it. This vertical stacking arrangement allows both components to coexist without interfering with each other's optimal placement, maintaining electrical wiring simplicity while accommodating the common mode coil.
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 configuration enables the installation of a common mode coil without enlarging the inverter accommodating section, achieving high performance, size reduction, and enhanced mountability of the electric compressor while maintaining the same planar area, thus addressing the constraints of size reduction and compactness.
Implementation Method 1
reducing common mode noise of the inverter device. In this case, a common mode coil is necessary
Implementation Method 2
an inverter device that converts direct-current power supplied from a high-voltage power source to three-phase alternating-current power and feeds the three-phase alternating-current power to the electric motor
Implementation Method 3
an electric motor and a compression mechanism... converts direct-current power supplied from a high-voltage power source to three-phase alternating-current power and feeds the three-phase alternating-current power to the electric motor
Data Source
Figure 1
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AI summary
A common mode coil can be installed without having to increase the planar area for an inverter accommodating section so that high performance and size reduction and compactness of an inverter device can be achieved. An integrated-inverter electric compressor (1) in which an inverter accommodating section (4) is provided on an outer periphery of a cylindrical housing (2) containing an electric motor and a compression mechanism. The inverter accommodating section (4) accommodates an inverter device (20) that includes high-voltage components, such as inverter board (21), smoothing capacitor (23), inductor coil (24), and common mode coil (30); a terminal block (26) connected with a high-voltage cable (28, 29); and a bus bar assembly (32) including a plurality of bus bars (33) for electrical wiring. The inverter accommodating section (4) is provided with an outward extending portion (9) extending outward from one end of the cylindrical housing (2). An area in the inverter accommodating section (4) that corresponds to the outer periphery of the cylindrical housing (2) serves as an installation site (5) for the inverter board, and the outward extending portion (9) serves as a high-voltage-component installation site (10) where the smoothing capacitor (23) and the inductor coil (24) are disposed. The high-voltage-component installation site (10) is designated as an installation site (11) for the terminal block (26). The coil installation site (12) where the common mode coil (30) is disposed is formed below the terminal-block installation site (11).