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Inverter integrated motor-driven compressor

A technology of electric compressors and inverters, which is applied in the direction of machines/engines, liquid variable capacity machines, electrical components, etc., can solve the problems of increased common state coils, large size and high cost, etc., and achieves the reduction of electromagnetic radiation Effects of noise reduction, cost reduction, and miniaturization and weight reduction

Inactive Publication Date: 2013-07-17
MITSUBISHI HEAVY INDUSTIRES AUTOMOTIVE THERMAL SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common mode coil is only inserted into the HV line, and the HV line flows a large current of tens of A class, so the common mode coil must be enlarged, including problems such as large size and high cost.

Method used

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  • Inverter integrated motor-driven compressor
  • Inverter integrated motor-driven compressor
  • Inverter integrated motor-driven compressor

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no. 1 approach

[0033] Below, use Figure 1 to Figure 6 , the first embodiment of the present invention will be described.

[0034] figure 1A schematic diagram showing a motor drive system circuit of an inverter-integrated electric compressor according to a first embodiment of the present invention, figure 2 Represents its sketch. and, Figure 6 It is a schematic diagram showing a schematic configuration of an inverter-integrated electric compressor.

[0035] The inverter-integrated electric compressor 1 includes a casing (frame) 2 made of a conductor made of aluminum die-casting, and a compression mechanism (not shown) and a motor for driving the compression mechanism are built in the casing 2 3.

[0036] In the outer circumference of the casing 2, an inverter housing part 4 is integrally formed (refer to Figure 6 ), and the inverter 5 is accommodated in the inverter accommodating portion 4 , thereby constituting the inverter-integrated electric compressor 1 in which the inverter 5 i...

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Abstract

The objective of the present invention is to provide an inverter integrated motor-driven compressor, wherein electromagnetic radiation noise can be reduced, the amount of electromagnetic radiation noise to leak outside and the amount of electromagnetic radiation noise to flow outside via a ground line can also be reduced, and wherein a noise reduction circuit can be made more compact, lightweight, and with less cost. In an inverter integrated motor-driven compressor (1), which has an inverter (5) for controlling power to be applied to an electric motor (3) for driving a compression mechanism installed integrally onto a housing (2) wherein the compression mechanism and the electric motor (3) are built in, impedance elements (Z) having the same capacity are inserted between and connected to the housing (2), which is grounded and into which higher harmonic currents from the inverter (5) and the electric motor (3) flow, and P / N lines (7) for supplying power from a power supply to the inverter (5).

Description

technical field [0001] The present invention relates to an inverter-integrated electric compressor in which an inverter is integrated. Background technique [0002] Electric compressors used in vehicle air conditioners such as electric vehicles (EV vehicles) and hybrid vehicles (HEV vehicles) have a structure in which a compression mechanism and an electric motor that drives the compression mechanism are integrally installed. An inverter is incorporated that converts DC power supplied from the power supply unit via a high-voltage line (HV line) into three-phase AC power to apply to the motor and drive the motor. In such an inverter-integrated electric compressor, the electric motor driven by the inverter and the potential of the inverter are controlled by PWM (Pulse Width Modulation: Pulse Width Modulation), and thus contain many harmonics. [0003] In the above-mentioned electric compressor, since there is a parasitic capacitance between the casing, the inverter, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48F04B39/00H02M1/44
CPCH02M1/44F04B35/04H02K11/05
Inventor 永坂圭史中野浩儿
Owner MITSUBISHI HEAVY INDUSTIRES AUTOMOTIVE THERMAL SYST CO LTD
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