Electric drive system, powertrain, heating method, and electric vehicle
US-2024001777-A1 · Jan 4, 2024 · US
Control device for electric car
US9762165B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9762165-B2 |
| Application number | US-201214419407-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 9, 2012 |
| Priority date | Aug 9, 2012 |
| Publication date | Sep 12, 2017 |
| Grant date | Sep 12, 2017 |
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Abstract
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A resistance calculation activator determines whether or not an electric car is stopped on the basis of a drive command signal and an external signal, and activates a resistance calculator if a powering command is input as the drive command when it is determined that the electric car is stopped. The activated resistance calculator computes, within a resistance calculation period, a resistance value of an AC motor that produces driving force for the electric car, on the basis of a d-axis voltage command value and a d-axis current value supplied to the AC motor.
First claim
Opening claim text (preview).
The invention claimed is: 1. A control device for an electric car comprising: a power converter that drives an AC motor that produces driving force for a vehicle; a controller that outputs a voltage command value that is a command value of a voltage that the power converter outputs; a current detector that detects a current value that the power converter supplies to the AC motor; and a resistance calculator that computes a resistance value of the AC motor on a basis of the voltage command value and the current value, wherein in a period in which the resistance calculator computes a resistance value of the AC motor, the controller outputs the voltage command value such that an amplitude of the current value that the power converter supplies to the AC motor becomes a current value that is larger than the amplitude of a rated exciting current of the AC motor. 2. A control device for an electric car comprising: a power converter that drives an AC motor that produces driving force for a vehicle; a controller that outputs a voltage command value that is a command value of a voltage that the power converter outputs; a current detector that detects a current value that the power converter supplies to the AC motor; and a resistance calculator that computes a resistance value of the AC motor on a basis of the voltage command value and the current value, wherein in a period in which the resistance calculator computes a resistance value of the AC motor, the power converter operates at a carrier frequency that is lower than the carrier frequency used when the AC motor is revolving.
Assignees
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Classifications
Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H) · CPC title
Operations & Transport · mapped topic
Current · CPC title
Induction machines · CPC title
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9762165B2 cover?
- A resistance calculation activator determines whether or not an electric car is stopped on the basis of a drive command signal and an external signal, and activates a resistance calculator if a powering command is input as the drive command when it is determined that the electric car is stopped. The activated resistance calculator computes, within a resistance calculation period, a resistance v…
- Who is the assignee on this patent?
- Yamashita Yoshinori, Kato Sho, Yamasaki Hisanori, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B60L3/0061. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 12 2017 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).