JP2018182850A5 - - Google Patents

Description

With the above configuration, the power modules 11, 12, and 13 are configured to obtain an output in which three sets of semiconductor switching elements are connected in parallel for each power module, and drive the small-capacity semiconductor switching elements in parallel. Thus, a device having a large current capacity can be realized.

Note that the snubber capacitors 51, 52, and 53 of the first and second embodiments may be replaced with a series circuit of a capacitor and a resistor. This series circuit is configured so that a surge voltage and a switching waveform accompanying switching of the power modules 11, 12, and 13 have desired values. Note that the method of arranging the components on the printed circuit board 1 described in the first and second embodiments has the same effect when the power converters 10-1 and 10-2 are used as inverter devices. In the first and second embodiments, the configuration examples in which the numbers of the snubber capacitors 51, 52, 53 and the smoothing capacitors 41, 42, 43 are equal to the number of the power modules 11, 12, 13 have been described. The quantity may be changed according to the capacity of the load connected to the power converters 10-1 and 10-2 and the use of the power converters 10-1 and 10-2. In the first and second embodiments, three semiconductor switching element pairs built in the three power modules 11, 12, and 13 have been described as three configuration examples in parallel. However, if the number of parallel power modules is two or more, Similar effects can be obtained.

In the power converter according to the present embodiment, output terminals connected to a connection point of two semiconductor switching elements forming each of the plurality of semiconductor switching element pairs are connected to each other, and the plurality of semiconductor switching element pairs are connected to each other. among them, the smoothing capacitor positive multiple connected semiconductor switching element oN / oFF drive at the same timing, the plurality of semiconductor switching element pairs, a plurality of semiconductor switching elements connected to the negative side of the smoothing capacitor You may comprise so that on / off drive may be performed at the same timing. With such a configuration and driving, it is possible to realize a semiconductor switching element having a large current capacity at a low cost with a plurality of semiconductor switching elements having a small current capacity.

Claims (7)

A printed circuit board,
A plurality of power modules provided on the printed circuit board,
A snubber capacitor provided on the printed circuit board;
And a smoothing capacitor provided on the printed circuit board,
The power module includes a package having a semiconductor switching element, a power-side terminal provided in the package, and a control-side terminal provided in the package.
The distance from the power side terminal to the snubber capacitor is shorter than the distance from the control side terminal to the snubber capacitor,
The printed circuit board has a plurality of wiring layers,
The power converter, wherein the positive terminal and the negative terminal of the smoothing capacitor are wired to each other using different layers in the plurality of wiring layers, and are wired to the power side terminal. It said power module includes a plurality of semiconductor switching element pair of the two of said semiconductor switching elements connected in series,
One end of each of the plurality of semiconductor switching element pairs is connected to the positive side of the smoothing capacitor,
The other end of each of the plurality of semiconductor switching element pairs is connected to the negative side of the smoothing capacitor,
The power converter according to claim 1, wherein the power-side terminal includes an output terminal connected to a connection point of the two semiconductor switching elements connected in series. The output terminals connected to the connection points of the two semiconductor switching elements constituting each of the plurality of semiconductor switching element pairs are connected to each other,
The plurality of the semiconductor switching element pairs, a positive multiple of the semiconductor switching element connected to the side on / off driven at the same timing of the smoothing capacitor,
3. The power converter according to claim 2, wherein a plurality of the semiconductor switching elements connected to the negative side of the smoothing capacitor among the plurality of semiconductor switching element pairs are turned on / off at the same timing. The plurality of power modules arranged in a line are provided in parallel with the snubber capacitors arranged in a line,
The power converter according to any one of claims 1 to 3, wherein the power-side terminals of the plurality of power modules arranged in a line are arranged in a straight line.   The power converter according to any one of claims 1 to 3, wherein the plurality of power modules are arranged so as to surround a capacitor group including the snubber capacitor. An output terminal electrically connected to the power side terminal,
The output terminal is provided on one plate surface side of the printed circuit board,
The power module is provided on the other plate surface side of the printed circuit board,
The power converter according to any one of claims 1 to 5, wherein the output terminal is provided in an area formed by projecting the power module toward the printed circuit board.   The power converter according to any one of claims 1 to 6, wherein the semiconductor switching element is made of a wide band gap semiconductor.