Method, apparatus and system for operating a rotating electric machine

Patent metadata

Field	Value
Publication number	US-2016248353-A1
Application number	US-201415030644-A
Country	US
Kind code	A1
Filing date	Oct 21, 2014
Priority date	Oct 25, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

The invention provides a method, an apparatus and a system 1 for operating a rotating electric machine. The method has the following steps: defining (S 01 ) a rotor position angle reference value of a rotor of the rotating electric machine (REM); determining (S 02 ) a first rotor position angle measured value of the rotor during operation in the case of essentially a first speed of the rotor by means of a rotor position detection device (REE) of the rotating electric machine (REM); determining (S 03 ) a second rotor position angle measured value of the rotor during operation in the case of essentially a second speed of the rotor by means of the rotor position detection device (REE) of the rotating electric machine (REM), wherein the second speed of the rotor differs from the first speed of the rotor; defining (S 04 ) a first angular offset as the difference between the first rotor position angle measured value and the rotor position angle reference value; defining (S 05 ) a second angular offset as the difference between the second rotor position angle measured value and the rotor position angle reference value; and calculating (S 06 ) a signal delay of the rotor position detection device (REE) on the basis of the defined first angular offset, the defined second angular offset, the first speed of the rotor and the second speed of the rotor.

First claim

1 . A method for operating a rotating electric machine (REM) the method comprising:
defining (S 01 ) a rotor position angle reference value of a rotor of the rotating electric machine (REM); determining (S 02 ) a first rotor position angle measured value of the rotor during operation in the case of essentially a first rotational speed of the rotor by a rotor position detection device (REE) of the rotating electric machine (REM); determining (S 03 ) a second rotor position angle measured value of the rotor during operation in the case of essentially a second rotational speed of the rotor by the rotor position detection device (REE) of the rotating electric machine (REM), wherein the second rotational speed of the rotor differs from the first rotational speed of the rotor; defining (S 04 ) a first angular offset as the difference between the first rotor position angle measured value and the rotor position angle reference value; defining (S 05 ) a second angular offset as the difference between the second rotor position angle measured value and the rotor position angle reference value; and calculating (S 06 ) a signal delay of the rotor position detection device (REE) on the basis of the defined first angular offset, the defined second angular offset, the first rotational speed of the rotor, and the second rotational speed of the rotor.

2 . The method according to claim 1 , further comprising:
calculating (S 07 ) a constant angular offset component from the defined first and/or second angular offset using the calculated signal delay.

3 . The method according to claim 2 further comprising the step:
calculating (S 08 ) a third angular offset in the case of a third rotational speed of the rotor as the sum of the constant angular offset component and the product of the determined signal delay and the third rotational speed of the rotor.

4 . The method according to claim 3 further comprising:
controlling (S 09 ) the rotating electric machine (REM) on the basis of the calculated third angular offset.

5 . The method according to claim 1 , wherein at least one further angular offset is defined, which is in each case a difference between respectively one determined further rotor position angle measured value and the rotor position angle reference value; and wherein calculating (S 06 ) the signal delay is furthermore based on the defined further angular offsets.

6 . The method according to claim 1 , wherein a known rotor position at a point of intersection of two phase-to-phase voltage curves of the rotating electric machine (REM) is defined (S 01 ) as the rotor position reference value.

7 . An apparatus for operating a rotating electric machine (REM), comprising:
a rotor position detection device (REE) which is configured to determine (S 02 ) a first rotor position angle measured value during operation in the case of essentially a first rotational speed of a rotor of the rotating electric machine (REM) and to determine (S 03 ) a second rotor position angle measured value during operation in the case of essentially a second rotational speed of the rotor of the rotating electric machine (REM); and a computing device (CAL) which is designed to: define (S 04 ) a first angular offset as the difference between the first rotor position angle measured value and a rotor position angle reference value, define (S 05 ) a second angular offset as the difference between the second rotor position angle measured value and the rotor position angle reference value and calculate (S 06 ) a signal delay of the rotor position detection device (REE) on the basis of the defined first angular offset, the defined second angular offset, the first rotational speed of the rotor and the second rotational speed of the rotor.

8 . The apparatus according to claim 7 , wherein the computing device (CAL) is further configured to calculate (S 07 ) a constant angular offset from the defined first and second angular offsets using the calculated signal delay.

9 . The apparatus according to claim 8 , wherein the computing device (CAL) is further configured to calculate (S 08 ) a third angular offset in the case of a third rotational speed of the rotor as the sum of the constant angular offset component and the product of the determined signal delay and the third rotational speed of the rotor.

10 . The apparatus according to claim 9 , wherein the computing device (CAL) is further configured to control (S 09 ) the rotating electric machine (REM) in an open-loop manner based on the calculated third angular offset
and wherein the rotating electric machine (REM) is configured in such a way that said machine is controlled (S 09 ) in a closed-loop manner on the basis of the calculated third angular offset.

11 . A system for operating a rotating electric machine comprising the rotating electric machine (REM); and
an apparatus for operating the rotating electric machine (REM) according to claim 7 .

12 . The method according to claim 3 further comprising:
controlling (S 09 ) the rotating electric machine (REM) in an open-loop manner on the basis of the calculated third angular offset.

13 . The method according to claim 3 further comprising:
controlling (S 09 ) the rotating electric machine (REM) in a closed-loop manner on the basis of the calculated third angular offset.

14 . The apparatus according to claim 9 , wherein the computing device (CAL) is further configured to control (S 09 ) the rotating electric machine (REM) in an open-loop manner based on the calculated third angular offset.

15 . The apparatus according to claim 9 , wherein the computing device (CAL) is further configured to control (S 09 ) the rotating electric machine (REM) in a closed-loop manner on the basis of the calculated third angular offset.

Assignees

• Bosch Gmbh Robert

Inventors

• Ungermann Michael
• Zirkel Daniel
• Beyer Mario

Classifications

• H02P6/16 Primary

  Circuit arrangements for detecting position · CPC title

• G01D5/24476

  Signal processing (G01D5/2448 - G01D5/24495 take precedence) · CPC title

• G01D5/2448 Primary

  Correction of gain, threshold, offset or phase control · CPC title