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Variable frequency drive and methods for filter capacitor fault detection
US8937796B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937796-B2 |
| Application number | US-201213532906-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 26, 2012 |
| Priority date | May 28, 2010 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.
First claim
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The following is claimed: 1. A variable frequency drive, comprising: a rectifier providing rectified DC electrical power at a DC output; an intermediate DC circuit coupled with the DC output of the rectifier; an inverter coupled with the intermediate DC circuit and operative to provide variable frequency AC electrical power to a load; at least one filter circuit comprising a plurality of filter capacitors coupled to a neutral node; a feedback circuit coupled with the neutr…
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Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8937796B2 cover?
- Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.
- Who is the assignee on this patent?
- Xiao Yuan, Zargari Navid, Pande Manish, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H02M5/451. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 20 2015 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).