Power supply system, image forming apparatus having the power supply system, and control method of the power supply system
US-9509219-B2 · Nov 29, 2016 · US
Method for discharging an intermediate circuit capacitor of an intermediate voltage circuit converter
US9906160B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9906160-B2 |
| Application number | US-201013390867-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 13, 2010 |
| Priority date | Aug 17, 2009 |
| Publication date | Feb 27, 2018 |
| Grant date | Feb 27, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method for discharging an intermediate circuit capacitor of an intermediate voltage circuit converter with an electronic power converter is disclosed, wherein a main switch arranged between an AC power supply network and a primary winding of a transformer is opened and a line contactor connected between a first terminal of a secondary winding of the transformer and a first AC voltage-side connection of the electronic power converter is closed. A second terminal of the secondary winding of the transformer is connected to a second AC voltage-side connection of the electronic power converter. A pre-charging contactor connected in series with a pre-charging resistor is connected in parallel with the line contactor. Two switchable power semiconductors of the electronic power converter, which are located diagonally opposite each other in different branches of the electronic power converter, are switched on.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for discharging an intermediate circuit capacitor of an intermediate voltage circuit converter with an AC voltage-side electronic power converter having a plurality of switchable power semiconductors, the method comprising the steps of: opening a main switch arranged between an AC power supply network and a primary winding of a transformer, opening a line contactor connected between a first terminal of a secondary winding of the transformer and a first AC voltage-side connection in a first branch of the electronic power converter, with a second terminal of the secondary winding of the transformer being connected to a second AC voltage-side connection in a second branch of the electronic power converter, closing a pre-charging contactor, which is connected in series with a pre-charging resistor, with the series connection of the pre-charging contactor and the pre-charging resistor being connected in parallel with the line contactor, and switching on two switchable power semiconductors of the plurality of switchable power semiconductors, which are located diagonally opposite each other in different branches of the electronic power converter, thereby discharging the intermediate circuit capacitor via a current path formed by the pre-charging contactor, the secondary winding of the transformer and the two switchable power semiconductors. 2. The method of claim 1 , further comprising the steps of: opening the pre-charging contactor when the intermediate circuit capacitor reaches a predetermined reduced charge state, and switching the two switched-on switchable power semiconductors off.
Assignees
Inventors
Classifications
- H02M7/125Primary
Avoiding or suppressing excessive transient voltages or currents · CPC title
Electricity · mapped topic
Means for starting or stopping converters · CPC title
Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock · CPC title
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- What does patent US9906160B2 cover?
- A method for discharging an intermediate circuit capacitor of an intermediate voltage circuit converter with an electronic power converter is disclosed, wherein a main switch arranged between an AC power supply network and a primary winding of a transformer is opened and a line contactor connected between a first terminal of a secondary winding of the transformer and a first AC voltage-side con…
- Who is the assignee on this patent?
- Ackermann Markus, Amler Gerald, Nagel Andreas, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H02M7/125. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 27 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).