Frequency converter with DC link capacitor and method for pre-charging the DC link capacitor
US-9318969-B2 · Apr 19, 2016 · US
Battery charger noise reduction by frequency switching
US9379575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9379575-B2 |
| Application number | US-201414200967-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 7, 2014 |
| Priority date | Mar 7, 2014 |
| Publication date | Jun 28, 2016 |
| Grant date | Jun 28, 2016 |
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- Title
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Abstract
Official abstract text for this publication.
A method of charging a battery in a charging system having a power convertor that coverts AC electrical power to DC electrical power includes operating the power convertor at a first frequency during a first charging phase of the charging system; ending the first charging phase upon determining that a predetermined criterion is satisfied; and subsequent to ending the first charging phase, operating the power convertor at a second frequency during a second charging phase of the charging system, wherein the first frequency is different than the second frequency.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of charging a battery in a charging system having a power convertor that converts AC electrical power to DC electrical power, the method comprising: operating the power convertor at a first frequency during a first charging phase of the charging system; monitoring a power output value of the power convertor during the first charging phase, wherein a predetermined criterion is satisfied when the power output value drops below a threshold power output value; ending the first charging phase upon determining that the predetermined criterion is satisfied; and subsequent to ending the first charging phase, operating the power convertor at a second frequency during a second charging phase of the charging system, wherein the first frequency is different than the second frequency, and operation of the power convertor the first frequency at a first power output value causes audible noise at a lower level than operation of the power convertor at the second frequency at the threshold power output value. 2. The method of claim 1 , wherein the first frequency is at least one of 20 percent higher or 20 percent lower than the second frequency. 3. The method of claim 1 , wherein the first frequency is at least one of 50 percent higher or 50 percent lower than the second frequency. 4. The method of claim 1 , wherein the first frequency is higher than the second frequency. 5. The method of claim 1 , wherein the first frequency is lower than the second frequency. 6. A method of charging a battery in a charging system having a power convertor that converts AC electrical power to DC electrical power, the method comprising: operating the power convertor at a first frequency during a first charging phase of the charging system; monitoring a power output value of the power convertor during the first charging phase of the charging system; ending the first charging phase upon determining that the power output value of the power convertor has dropped below a threshold value; and subsequent to ending the first charging phase, operating the power convertor at a second frequency during a second charging phase of the charging system, wherein the first frequency is different than the second frequency and the first frequency is at least one of 20 percent higher than the second frequency or 20 percent lower than the second frequency. 7. The method of claim 6 , wherein operation of the charging system at the first frequency at a first power output value causes audible noise at a lower level than operation of the charging system at the second frequency at the first power output value. 8. The method of claim 7 , wherein the first frequency is at least one of 50 percent higher than the second frequency or 50 percent lower than the second frequency. 9. A method of charging a battery in a charging system having a power convertor that converts AC electrical power to DC electrical power, the method comprising: operating the power convertor at a first frequency during a first charging phase of the charging system; monitoring an elapsed time value measured from the time at which the first charging phase commences; ending the first charging phase upon determining the elapsed time value has reached a threshold value; and subsequent to ending the first charging phase, operating the power convertor at a second frequency during a second charging phase of the charging system, wherein the first frequency is different than the second frequency and operation of the power convertor at the first frequency at a first power output value causes audible noise at a lower level than operation of the power convertor at the second frequency at the first power output value. 10. The method of claim 9 , wherein the first frequency is at least one of 20 percent higher than the second frequency or 20 percent lower than the second frequency. 11. The method of claim 9 , wherein the first frequency is at least one of 50 percent higher than the second frequency or 50 percent lower than the second frequency.
Assignees
Inventors
Classifications
in response to temperature · CPC title
with prioritisation of loads or sources · CPC title
AC to DC converters · CPC title
Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles · CPC title
electro magnetic [EMI] · CPC title
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Frequently asked questions
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- What does patent US9379575B2 cover?
- A method of charging a battery in a charging system having a power convertor that coverts AC electrical power to DC electrical power includes operating the power convertor at a first frequency during a first charging phase of the charging system; ending the first charging phase upon determining that a predetermined criterion is satisfied; and subsequent to ending the first charging phase, opera…
- Who is the assignee on this patent?
- Nissan North America Inc
- What technology area does this patent fall under?
- Primary CPC classification H02J7/042. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 28 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).