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In-vehicle motor-driven compressor
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of electric compressors and compression parts, which is applied in the direction of machines/engines, circuits, inductors, etc., and can solve problems such as damping effects
Inactive Publication Date: 2021-03-26
TOYOTA IND CORP
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Thus, the choke coil has a damping effect
Method used
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no. 1 Embodiment approach
[0039] Hereinafter, an in-vehicle electric compressor according to a first embodiment will be described with reference to the drawings. The vehicle-mounted electric compressor of the present embodiment includes a compression unit that compresses a refrigerant that is a fluid, and is used in a vehicle-mounted air conditioner. That is, the fluid to be compressed by the vehicle-mounted electric compressor in this embodiment is refrigerant.
[0040] like figure 1 As shown, the vehicle-mounted air conditioner 10 includes a vehicle-mounted electric compressor 11 and an external refrigerant circuit 12 that supplies refrigerant as a fluid to the vehicle-mounted motor compressor 11 . The external refrigerant circuit 12 includes, for example, a heat exchanger, an expansion valve, and the like. The in-vehicle electric compressor 11 compresses the refrigerant, and the external refrigerant circuit 12 performs heat exchange and expansion of the refrigerant. The vehicle air conditioner 10...
no. 2 Embodiment approach
[0114] Next, the second embodiment will be described focusing on differences from the first embodiment.
[0115] In the second embodiment, instead of Figure 3A , 3B , 3C, 3D and adopted Figure 12A , 12B , 12C, 12D structures shown.
[0116] exist Figure 12A , 12B , 12C, and 12D, the common mode choke coil 90 includes an annular core 100 having a through hole 100a inside, a first winding 110 wound around the core 100, a second winding 111 wound around the core 100, and an annular Metal thin film 120 of a conductor. The second winding 111 is separated from the first winding 110 and faces the first winding 110 . The metal thin film 120 spans the first winding 110 and the second winding 111 and covers the core 100 .
[0117] like Figure 13A , 13B As shown, when viewed from the axial direction, the core 100 has a first straight portion 101, a second straight portion 102, a first arc portion 103 as a large arc, and a second arc portion 104 as a small arc. . One end o...
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Abstract
An in-vehicle motor-driven compressor includes a common mode choke coil including an annular core having a through-hole, a first winding and a second winding wound around the core, and an annular conductor. The second winding is opposed to the first winding while being spaced apart from the first winding. The conductor surrounds the first and second windings, and the core. The conductor includes sections opposed to each other with the through-hole in between. The core is symmetrical with respect to at least one symmetry axis when the through-hole is viewed from the front. The first winding islocated on one side of the at least one symmetry axis, and the second winding is located on the other side of the symmetry axis, so that the at least one symmetry axis is located between the first andsecond windings. The core includes an exposed section not covered with the conductor.
Description
technical field [0001] The present disclosure relates to an electric compressor for a vehicle. Background technique [0002] WO 2017 / 170817 A discloses a choke coil covered with a conductor as a structure of a common mode choke coil (choke coil) used in an inverter device for driving an electric motor in a vehicle-mounted electric compressor. In such a choke coil, an induced current flows through the conductor due to a leakage magnetic flux generated when a normal-mode current flows, and the induced current is converted into heat energy in the conductor. Thus, the choke coil has a damping effect. Contents of the invention [0003] The problem to be solved by the invention [0004] When the entire choke coil is covered with a conductor, there is a concern that heat is likely to remain. On the other hand, if a portion not covered by a conductor is provided to improve heat dissipation, the induced current will hardly flow and the damping effect may be reduced. [0005] An...
Claims
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Application Information
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