JP2004205345A - Method of correcting resolver - Google Patents

Method of correcting resolver Download PDF

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Publication number
JP2004205345A
JP2004205345A JP2002374914A JP2002374914A JP2004205345A JP 2004205345 A JP2004205345 A JP 2004205345A JP 2002374914 A JP2002374914 A JP 2002374914A JP 2002374914 A JP2002374914 A JP 2002374914A JP 2004205345 A JP2004205345 A JP 2004205345A
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JP
Japan
Prior art keywords
resolver
error data
signal
correction
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002374914A
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Japanese (ja)
Inventor
Katsutoshi Toyotake
克年 豊竹
Original Assignee
Tamagawa Seiki Co Ltd
多摩川精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tamagawa Seiki Co Ltd, 多摩川精機株式会社 filed Critical Tamagawa Seiki Co Ltd
Priority to JP2002374914A priority Critical patent/JP2004205345A/en
Publication of JP2004205345A publication Critical patent/JP2004205345A/en
Pending legal-status Critical Current

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Abstract

An object of the present invention is to improve the accuracy of an output resolver signal by adding resolver error data after one-time correction to a correction ROM.
A method of correcting a resolver according to the present invention is to add second resolver error data (10a) after addition / subtraction once to a correction ROM (11) to update first resolver error data (5aA). Is a method of increasing the accuracy.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for correcting a resolver, and in particular, updates a first resolver error data by adding a second resolver error data obtained after adding / subtracting based on a previously measured first resolver error data to a correction ROM. The present invention relates to a novel improvement for performing an update process one or more times to reduce an error and improve the accuracy of an output resolver signal.
[0002]
[Prior art]
Conventionally, as a method of correcting this type of resolver, which has been used in-house, patent documents and non-patent documents are not shown, but the method shown in FIG. 2 has been adopted.
That is, a resolver indicated by reference numeral 1 in FIG. 2 is a 1X (X is a multiple of axis) first signal 2 from the resolver 1 is a first R / D converter for digitizing a well-known resolver signal. After being converted into a 7-bit digital signal 4 by the mixer 3, it is input to the mixing circuit 5.
[0003]
The second signal 6 of 128X (X is a multiple of the axis) from the resolver 1 is converted into a digital signal 8 of 18 bits by a second R / D converter 7 and then input to the mixing circuit 5, where the first signal 4 The mixed signal is input to the addition / subtraction unit 10 and the error measurement unit 20 as a 25-bit absolute resolver signal 5a.
[0004]
An error of the resolver signal 5a from a set value is measured in advance by an error measuring unit 20, and resolver error data 5aA, which is a difference from the set value, is stored in the correction ROM 11 for one time.
The resolver error data 5aA is read from the correction ROM 11 and input to the addition / subtraction unit 10, where the resolver signal 5a is added / subtracted, and an output resolver signal 12 with higher precision is obtained.
[0005]
[Problems to be solved by the invention]
Since the conventional resolver correction method is configured as described above, the following problems exist.
That is, in the conventional method, since only one correction is performed on the resolver signal, the accuracy of the output resolver signal output is not sufficiently improved.
[0006]
The present invention has been made to solve the above problems, and in particular, adds second resolver error data obtained after addition / subtraction based on previously measured first resolver error data to a correction ROM. It is an object of the present invention to provide a resolver correction method in which an update process for updating the first resolver error data is performed once or a plurality of times to reduce the error and improve the accuracy of the output resolver signal.
[0007]
[Means for Solving the Problems]
The method of correcting a resolver according to the present invention stores the first resolver error data obtained by measuring the resolver signal from the resolver in advance in a correction ROM, and then stores the first resolver error data in the correction ROM. In a method of correcting a resolver in which an output resolver signal is obtained by adding and subtracting one resolver error data, the second resolver error data obtained after the addition and subtraction is added to the correction ROM to update the first resolver error data. In this method, the update process is performed once or a plurality of times, and the average process of the second resolver error data is performed a plurality of times.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a method for correcting a resolver according to the present invention will be described with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals.
In FIG. 1, reference numeral 1 denotes a resolver, and a 1X (X is a multiple of axis) first signal 2 from the resolver 1 is a first R / D converter 3 for digitizing a well-known resolver signal. After being converted into a 7-bit digital signal 4 by the above, the digital signal 4 is input to the mixing circuit 5.
[0009]
The second signal 6 of 128X (X is a multiple of the axis) from the resolver 1 is converted into an 18-bit digital signal 8 by a second R / D converter 7 and then input to the mixing circuit 5 to be combined with the first signal 4 The mixed signal is input to the addition / subtraction unit 10 and the error measurement unit 20 as a 25-bit absolute resolver signal 5a.
[0010]
An error of the resolver signal 5a from a set value is measured in advance by the error measuring unit 20, and resolver error data 5aA, which is a difference from the error value, is stored in the correction ROM 11 for one time.
The resolver error data 5aA is read from the correction ROM 11, input to the addition / subtraction unit 10, where the resolver signal 5a is added / subtracted, and the output resolver signal 12 to be output is made highly accurate.
[0011]
The processing up to the above is the same as the conventional method, and the following processing is related to the present invention.
That is, the second resolver error data 10a included in the output resolver signal 12 obtained after adding and subtracting the resolver error data 5aA is fed back so as to be added to the correction ROM 11, and the first resolver error data 5aA is updated. By performing the updating process and performing the updating process one or more times, the first resolver error data 5aA is brought closer to the true value of the resolver 1 and higher accuracy is achieved. In addition, the updating process can be performed a plurality of times, and the obtained second resolver error data 10a can be averaged, so that random errors from the resolver and the measuring unit can be reduced. The above-described processes are performed by a program (not shown).
[0012]
【The invention's effect】
Since the resolver correction method according to the present invention is configured as described above, the following effects can be obtained.
That is, the second resolver error data of the output resolver signal corrected by the first resolver error data obtained by measuring the resolver signal is fed back to the correction ROM and added to update the first resolver error data. Higher accuracy of the output resolver signal can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a method of correcting a resolver according to the present invention.
FIG. 2 is a block diagram of a conventional method.
[Explanation of symbols]
1 Resolver 5a Resolver signal 5aA First resolver error data 10 Addition / subtraction unit 10a Second resolver error data 11 Correction ROM
12 output resolver signal

Claims (2)

  1. The first resolver error data (5aA) obtained by measuring the resolver signal (5a) from the resolver (1) in advance is stored in the correction ROM (11), and then the resolver obtained from the resolver (1) is obtained. A resolver correction method in which an output resolver signal (12) is obtained by adding / subtracting the first resolver error data (5aA) to / from the signal (5a),
    An update process of adding the second resolver error data (10a) obtained after the addition and subtraction to the correction ROM (11) and updating the first resolver error data (5aA) is performed, and the update process is performed once or A method of correcting a resolver, which is performed a plurality of times.
  2. 2. The method according to claim 1, wherein an averaging process of the second resolver error data (10a) is performed a plurality of times.
JP2002374914A 2002-12-25 2002-12-25 Method of correcting resolver Pending JP2004205345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002374914A JP2004205345A (en) 2002-12-25 2002-12-25 Method of correcting resolver

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JP2004205345A true JP2004205345A (en) 2004-07-22

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009139338A1 (en) * 2008-05-15 2009-11-19 多摩川精機株式会社 Angle detecting device and method for manufacturing the same
WO2009157307A1 (en) * 2008-06-24 2009-12-30 多摩川精機株式会社 Angle detection apparatus and manufacturing method thereof
US8204641B2 (en) 2009-07-31 2012-06-19 Denso Corporation Traction motor control apparatus for vehicle
US8487563B2 (en) 2009-11-27 2013-07-16 Denso Corporation Drive motor control apparatus for vehicle, motor control system, method for correcting rotation angle of motor, program for performing the same, rotation detecting apparatus
CN104567787A (en) * 2013-10-12 2015-04-29 北京航天计量测试技术研究所 Method for calibrating measurement accuracy of dynamic angle measuring system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009139338A1 (en) * 2008-05-15 2009-11-19 多摩川精機株式会社 Angle detecting device and method for manufacturing the same
US8669760B2 (en) 2008-05-15 2014-03-11 Tamagawa Seiki Co., Ltd. Angle detection system and method of manufacturing the same
CN102027332A (en) * 2008-05-15 2011-04-20 多摩川精机株式会社 Angle detecting device and method for manufacturing the same
JP5083782B2 (en) * 2008-05-15 2012-11-28 多摩川精機株式会社 Angle detection device and manufacturing method thereof
KR101300918B1 (en) * 2008-05-15 2013-08-27 타마가와 세이키 가부시키가이샤 Angle detecting device and method for manufacturing the same
WO2009157307A1 (en) * 2008-06-24 2009-12-30 多摩川精機株式会社 Angle detection apparatus and manufacturing method thereof
US8674687B2 (en) 2008-06-24 2014-03-18 Tamagawa Seiki Co., Ltd. Angle detection device and method of manufacturing the same
US8204641B2 (en) 2009-07-31 2012-06-19 Denso Corporation Traction motor control apparatus for vehicle
US8487563B2 (en) 2009-11-27 2013-07-16 Denso Corporation Drive motor control apparatus for vehicle, motor control system, method for correcting rotation angle of motor, program for performing the same, rotation detecting apparatus
CN104567787A (en) * 2013-10-12 2015-04-29 北京航天计量测试技术研究所 Method for calibrating measurement accuracy of dynamic angle measuring system

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