Power inverter

• US 20070246636A1
• Filed: 04/05/2007
• Published: 10/25/2007
• Est. Priority Date: 04/06/2006
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Tsuji, Masashige, Fujimoto, Takashi, Katayama, Hiroshi, Igarashi, Hiroaki, Yahata, Koichi
• Granted Patent: US 7,561,448 B2
• Time in Patent Office: Days
• US Class Current: 248/637
• CPC Class Codes: B60L 2260/56 Temperature prediction, e.g. for pre-cooling
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H05K 1/0231 Capacitors or dielectric substances
• CPC Class Codes: H05K 1/144 Stacked arrangements of planar printed circuit boards
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

A power inverter comprises a power module connected at least to a rotating electric machine, a gate drive circuit board which supplies switching power to the power module, and a rotating electric machine control circuit board which supplies a signal for controlling the waveform of the switching power to the gate drive circuit board. A noise reduction board is formed on a board different from the rotating electric machine control circuit board. The configuration of the noise reduction board is such that various signals for forming a signal for controlling the waveform of the switching power by means of the rotating electric machine control circuit board are inputted through the noise reduction board to the rotating electric machine control circuit board.

Claims

1. A power inverter comprising:

a power module connected at least to a rotating electric machine;

a gate drive circuit board for supplying switching power to said power module; and

a rotating electric machine control circuit board for supplying a signal for controlling the waveform of the switching power to said gate drive circuit board;

wherein a noise reduction board is formed on a board different from said rotating electric machine control circuit board; and

wherein the configuration of said noise reduction board is such that various signals for forming a signal for controlling the waveform of the switching power by means of said rotating electric machine control circuit board are inputted through said noise reduction board to said rotating electric machine control circuit board.

2. A power inverter comprising:

a power module connected to a rotating electric machine;

a gate drive circuit board for supplying switching power to said power module;

a rotating electric machine control circuit board for supplying a signal for controlling the waveform of the switching power to said gate drive circuit board; and

a smoothing capacitor connected in parallel to a position where said power module and a battery are connected;

wherein an active discharge board is formed on a board different from said rotating electric machine control circuit board; and

wherein said active discharge board is configured so that said smoothing capacitor be forcibly discharged by a signal inputted thereto.

3. A power inverter comprising:

a power module connected to a rotating electric machine;

a gate drive circuit board for supplying switching power to said power module;

a rotating electric machine control circuit board for supplying a signal for controlling the waveform of the switching power to said gate drive circuit board; and

a smoothing capacitor connected in parallel to a position where said power module and a battery are connected;

wherein said noise reduction board is formed on a board different from said rotating electric machine control circuit board, and the configuration of said noise reduction board is such that various signals for forming a signal for controlling the waveform of the switching power by means of said rotating electric machine control circuit board are inputted through said noise reduction board to said rotating electric machine control circuit board; and

wherein said active discharge board is formed on a board different from said rotating electric machine control circuit board, and said active discharge board is configured so that said smoothing capacitor be forcibly discharged by the signal inputted to said active discharge board.

4. The power inverter according to claim 3, wherein the signal inputted to said active discharge board passes through said noise reduction board.