INVERTER AND INTEGRATED-INVERTER ELECTRIC COMPRESSOR

• US 20110163705A1
• Filed: 02/04/2010
• Published: 07/07/2011
• Est. Priority Date: 02/10/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Kunieda, Naoto, Sato, Hidetaka, Teshima, Kazunori, Nakano, Koji, Toyama, Koji, Watanabe, Takayuki, Hirano, Takeshi, Nakagami, Takashi
• Granted Patent: US 9,059,620 B2
• Time in Patent Office: Days
• US Class Current: 318/400.24
• CPC Class Codes: H02K 11/02 for suppression of electromagnetic interference
• CPC Class Codes: H02K 11/026 Suppressors associated with brushes, brush holders or their supports
• CPC Class Codes: H02K 11/028 Suppressors associated with the rotor
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02M 1/126 using passive filters
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

In an inverter in which noise reducing coils and a smoothing capacitor are provided on a power line to an inverter module to achieve a no-busbar configuration, simplification of the manufacturing process, reduction of the influence on the size of the inverter, enhanced noise reducing function, reduction in cost and so on, the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with a power system board, and the noise reducing coils are connected to the power line by directly connecting output lead wires thereof to P-N terminals of the inverter module.

Claims

1. An inverter in which a noise reducing coil and a smoothing capacitor are provided on a power line to an inverter module including a power system board that converts DC power supplied from a power source to AC power and supplies the AC power to an electric motor and a control board that controls the AC power to be applied to the electric motor, wherein

the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with the power system board;

and

the noise reducing coil is connected to the power line by directly connecting an output lead wire thereof to P-N terminals of the inverter module.

2. The inverter according to claim 1, wherein the noise reducing coil includes at least two coils, that is, a common mode coil and a normal mode coil, and is connected to the power line by directly connecting individual output lead wires of the common mode coil and the normal mode coil to the P-N terminals of the inverter module.

3. The inverter according to claim 2, wherein the normal mode coil is provided, downstream of the common mode coil, at each of the P-pole side and the N-pole side of the power line and is connected to the power line by directly connecting individual output lead wires of the normal mode coil to the P-N terminals of the inverter module.

4. The inverter according to claim 2, wherein the common mode coil and the normal mode coil are connected to the power line by connecting two input lead wires of the common mode coil via a plurality of connection terminals provided at a terminal block to which power cables are connected and by electrically connecting the common mode coil and the normal mode coil.

5. The inverter according to claim 1, wherein the smoothing capacitor is disposed on the power system board, which, of the control board and the power system board disposed at the upper and lower positions in the inverter module, is the one disposed at the lower side.

6. The inverter according to claim 1, wherein the smoothing capacitor is disposed on the control board, which, of the control board and the power system board disposed at the upper and lower positions in the inverter module, is the one disposed at the upper side.

7. The inverter according to claim 1, wherein, at lead-wire solder portions, the P-N terminals and/or the plurality of connection terminals of the terminal block are provided with swaged portions, at which the lead wires of the common mode coil and/or the normal mode coil are swaged.

8. An integrated-inverter electric compressor provided with an inverter accommodating section on the periphery of a housing, in which the inverter according to claim 1 is integrally incorporated in the inverter accommodating section.

9. The integrated-inverter electric compressor according to claim 8, wherein the inverter accommodating section is divided into a first inverter accommodating section in which the inverter module is accommodated and a second inverter accommodating section in which the noise reducing coil is accommodated.

10. The integrated-inverter electric compressor according to claim 9, wherein the first inverter accommodating section is provided on the upper surface of the housing, and the second inverter accommodating section is provided at a side of the housing.