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Device and method for detecting a polarity reversal on a low voltage side of a DC voltage transformer in a dual-voltage vehicle electrical system
US9287704B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9287704-B2 |
| Application number | US-201013519503-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 12, 2010 |
| Priority date | Dec 28, 2009 |
| Publication date | Mar 15, 2016 |
| Grant date | Mar 15, 2016 |
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- Title
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Abstract
Official abstract text for this publication.
A device and a method for detecting a polarity reversal on a low voltage side of a DC voltage transformer in a dual-voltage vehicle electrical system, particularly in a motor vehicle. A current flow is enabled, in this instance, in a connecting line on the low voltage side of the DC voltage transformer by a controllable switching element, a current is detected in a connecting line on the low voltage side of the DC voltage transformer, with the aid of a current sensor system, the direction of the detected current is evaluated by an evaluation unit and a polarity reversal is detected if the direction of the detected current differs from an expected current direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A device for detecting a polarity reversal on a low voltage side of a DC voltage transformer in a dual-voltage vehicle electrical system, comprising: a controllable switching element for selectively enabling and interrupting a current flow in a connecting line on the low voltage side of the DC voltage transformer; a current sensor system for detecting the current in the connecting line on the low voltage side of the DC voltage transformer; and an evaluation unit for evaluating the direction of the detected current and for detecting a polarity reversal if the direction of the detected current deviates from an expected current direction; wherein, in a standby mode of the DC voltage transformer, the switching element is closed by the control unit at regular time intervals. 2. The device of claim 1 , wherein, after the closing of the switching element, the evaluation unit compares a sign of the detected current to an expected sign and detects a polarity reversal if the signs deviate from each other. 3. The device of claim 1 , wherein, upon activation of the DC voltage transformer, the switching element is closed by a control unit. 4. A method for detecting a polarity reversal on a low voltage side of a DC voltage transformer in a dual-voltage vehicle electrical system, the method comprising: enabling a current flow in a connecting line on the low voltage side of the DC voltage transformer by a controllable switching element; detecting the current in the connecting line on the low voltage side of the DC voltage transformer; evaluating the direction of the detected current; and detecting a polarity reversal if the direction of the detected current deviates from an expected current direction; wherein, in a standby mode of the DC voltage transformer, the switching element is closed at regular time intervals. 5. The method of claim 4 , wherein a sign of the detected current is compared to an expected sign, and a polarity reversal is detected if the signs deviate from each other. 6. The method of claim 4 , wherein, upon activation of the DC voltage transformer, the switching element is closed.
Assignees
Inventors
Classifications
DC supplies with two or more different DC voltage levels · CPC title
- H02J7/68Primary
using circuits for correcting or protecting against reverse-polarity · CPC title
- H02J1/08Primary
Three-wire DC power distribution systems; Systems having more than three wires · CPC title
relating to inverters · CPC title
having different nominal voltages · CPC title
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Frequently asked questions
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- What does patent US9287704B2 cover?
- A device and a method for detecting a polarity reversal on a low voltage side of a DC voltage transformer in a dual-voltage vehicle electrical system, particularly in a motor vehicle. A current flow is enabled, in this instance, in a connecting line on the low voltage side of the DC voltage transformer by a controllable switching element, a current is detected in a connecting line on the low vo…
- Who is the assignee on this patent?
- Pushkolli Beqir, Knorpp Thomas, Ruffer Michael, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H02J7/68. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 15 2016 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).