Inverter control apparatus and control method thereof
US-2015381095-A1 · Dec 31, 2015 · US
Inverter and method of controlling same
US9413280B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9413280-B2 |
| Application number | US-201414225047-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2014 |
| Priority date | May 20, 2013 |
| Publication date | Aug 9, 2016 |
| Grant date | Aug 9, 2016 |
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Abstract
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An inverter is provided. The inverter includes a current providing unit providing a first axis current and a second axis current to an induction motor; a revolutions per minute (RPM) measuring unit measuring the RPM of the induction motor; and a control unit changing the second axis current according to the measured RPM.
First claim
Opening claim text (preview).
What is claimed is: 1. An inverter comprising: a current providing unit configured to provide a first axis current and a second axis current to an induction motor, wherein the first axis current is a quadrate axis current and the second axis current is a direct axis current; a revolutions per minute (RPM) measuring unit configured to measure a RPM of the induction motor; and a control unit configured to: change the quadrate axis current and the direct axis current according to the measured RPM to allow the induction motor to have a maximum torque at the measured RPM if an acceleration of an electronic vehicle operates; and fix the direct axis current and change the quadrate current if the acceleration of the electronic vehicle does not operate. 2. The inverter according to claim 1 , further comprising a storage unit configured to match and store the measured RPM with the second axis current corresponding to the measured RPM. 3. The inverter according to claim 2 , wherein the control unit is further configured to control the current providing unit to search for a stored second axis current corresponding to the measured RPM and provide the stored second axis current to the induction motor. 4. A method of controlling an inverter, the method comprising: providing a first axis current and a second axis current to an induction motor, wherein the first axis current is a quadrate axis current and the second axis current is a direct axis current; measuring a RPM of the induction motor; changing the quadrate axis current and the direct axis current according to the measured RPM to allow the induction motor to have a maximum torque at the measured RPM if an acceleration of an electronic vehicle operates; and fixing the direct axis current and changing the quadrate current if the acceleration of the electronic vehicle does not operate. 5. The method according to claim 4 , further comprising matching and storing the measured RPM with the second axis current corresponding to the measured RPM. 6. The method according to claim 5 , wherein the changing of the second axis current comprises controlling a current providing unit to search for a stored second axis current corresponding to the measured RPM and providing the stored second axis current to the induction motor.
Assignees
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Classifications
characterised by the form of the current used in the control circuit · CPC title
Torque · CPC title
by pedal actuation · CPC title
Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage · CPC title
- H02P21/0035Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9413280B2 cover?
- An inverter is provided. The inverter includes a current providing unit providing a first axis current and a second axis current to an induction motor; a revolutions per minute (RPM) measuring unit measuring the RPM of the induction motor; and a control unit changing the second axis current according to the measured RPM.
- Who is the assignee on this patent?
- Lsis Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P21/0035. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 09 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).