Method and control unit for detecting a blocked electric machine in an electric vehicle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 8, 2015
Grant Date -
Mar 13, 2014
app pub date -
Mar 20, 2012
filing date -
May 16, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a method and a control unit, which makes it possible to reliably detect in an electric vehicle whether or not an electric machine is in a blocked state. For this purpose, a current rotational speed of the electric machine (1) is monitored using a control unit (7). If a non-rotating state is detected, the electric machine (1) is actuated specifically for increasing a torque. The current rotational speed is further monitored, in particular for an increase of the current rotational speed of the electric machine, at least a short-term one, for tensioning a drive train (3) against a wheel (5) blocked due to external influences, for example. If this is not the case, it is assumed that the electric machine (1) is blocked, and a corresponding blocking signal is generated. If the electric machine (1) is detachably connected to the wheel (5) via a coupling (19), it can be additionally provided that once the non-rotating state is detected, the coupling (19) is disengaged in order to see if the electric machine (1) will react to a request for an increased torque with an increased rotational speed, or if this does not happen due to a blocked electric machine.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully