Power output device
A technology of power output and output terminal, which is applied in the field of frequency converters and can solve the problems of large equipment footprint
Active Publication Date: 2015-06-10
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Problems solved by technology
[0003] In view of this, the present invention provides a power output device, which aims to solve the problem of large equipment footprint when outputting multiple voltages
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[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0049] The invention provides a power output device, such as figure 1 shown, including:
[0050] N power modules, a first output terminal and a second output terminal, where N is a natural number and N≥2;
[0051] Such as figure 1 101 , 102 . . . 10N are shown as N power modules respectively, 110 is the first output end, and 120 is the second output end.
[0052] The N power modules are connected in series through switches, the first output terminal 110 is ...
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The invention discloses a power output device which comprises N power modules and two output ends, wherein the N power modules are sequentially connected in series through a switch, a first output end is connected with a first power module, and a second output end is connected with the Nth power module; through connecting and disconnecting the switch, the output power of the device is changed; each power module comprises a three-layer current transform chain; the current transform chain comprises three power units, three input electric reactors, a current-equalizing electric reactor, the three power units are connected in series, the input electric reactors are respectively correspondingly connected with each power unit, and the current-equalizing electric reactor is connected with the three power units which are connected in series. According to the invention, the number of the power units which are connected in series can be controlled through the switch, thereby avoiding that the output of various voltages is realized by using a plurality of corresponding power units which are connected in series, and reducing the land-occupied area of equipment and the investment on equipment.
Description
technical field [0001] The invention relates to the field of frequency converters, in particular to a power output device. Background technique [0002] With the continuous progress of the times, the frequency conversion technology has developed rapidly, and the large-capacity high-voltage frequency conversion technology has been widely used. At present, the frequency converter mainly obtains high-voltage large-capacity output through cascading, that is, using several low-voltage power units connected in series. However, since the cascaded high-voltage inverter cannot flexibly switch the number of power units connected in series, the number of power units to achieve high-voltage output is fixed, which further leads to the fact that the inverter only has a single rated voltage output , but in many occasions, high-voltage frequency converters are required to drive motors of various voltage levels, so the existing power output devices cannot meet the needs of driving motors of ...
Claims
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IPC IPC(8): H02M1/00H02M5/40
Inventor 任涛马雅青彭力余军许汝波龙致远徐泽连黄欢杨鸣远欧海平肖泉华
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS