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Inverter device for electric vehicle
US9350283B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9350283-B2 |
| Application number | US-201114359479-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 30, 2011 |
| Priority date | Nov 30, 2011 |
| Publication date | May 24, 2016 |
| Grant date | May 24, 2016 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
An inverter device for an electric vehicle includes an inverter circuit that controls an electric motor connected to a wheel via a connecting member and a control unit that controls torque of the electric motor. The control unit includes a current control unit that executes control so that a q-axis current command for the electric motor matches a current flowing through the electric motor, and a limiter unit that puts limitations so that a magnitude of the q-axis current command does not become equal to or smaller than a preset predetermined value.
First claim
Opening claim text (preview).
The invention claimed is: 1. An inverter device for an electric vehicle, comprising: an inverter circuit that controls an electric motor connected to a wheel via a connecting member; and a control unit that controls torque of the electric motor, wherein the control unit includes: a current control unit that executes control so that torque of the electric motor matches a torque command for the electric motor, or so that a current flowing through the electric motor matches a current command for the electric motor; and a limiter unit that puts limitations so that a magnitude of the torque command or a magnitude of the current command does not become equal to or smaller than a preset predetermined value, wherein in an area where a magnitude of the torque command or the current command is small, the predetermined value is set to a value in which a polarity of torque output by the electric motor does not fluctuate between positive and negative. 2. The inverter device for an electric vehicle according to claim 1 , further comprising a lower-limit generating unit that generates the predetermined value, based on a signal corresponding to a speed of the electric motor.
Assignees
Inventors
Classifications
Voltage · CPC title
- H02P21/22Primary
Current control, e.g. using a current control loop · CPC title
acoustic · CPC title
Rotor flux based control involving the use of rotor position or rotor speed sensors · CPC title
Torque · CPC title
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Frequently asked questions
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- What does patent US9350283B2 cover?
- An inverter device for an electric vehicle includes an inverter circuit that controls an electric motor connected to a wheel via a connecting member and a control unit that controls torque of the electric motor. The control unit includes a current control unit that executes control so that a q-axis current command for the electric motor matches a current flowing through the electric motor, and …
- Who is the assignee on this patent?
- Kitanaka Hidetoshi, Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification H02P21/22. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 24 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).