CN105469966A - Rotary transformer - Google Patents
Rotary transformer Download PDFInfo
- Publication number
- CN105469966A CN105469966A CN201610020425.8A CN201610020425A CN105469966A CN 105469966 A CN105469966 A CN 105469966A CN 201610020425 A CN201610020425 A CN 201610020425A CN 105469966 A CN105469966 A CN 105469966A
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- CN
- China
- Prior art keywords
- rotor
- winding
- excitation
- resolver
- temperature
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/18—Rotary transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a rotary transformer, relating to the technical field of motor control and detection. The rotary transformer at least comprises two parts of a stator and a rotor, wherein each of the stator and the rotor at least comprises a winding and a ferromagnetic material, and a rotor excitation winding is opened in the rotary transformer. The rotary transformer disclosed by the invention can be used for sensing the position of the motor rotor which is coaxially arranged, meanwhile, the rotor-side excitation receiving winding is opened, an impedance sensitive temperature-sensing element which is arranged at the coaxially-arranged rotor side can be additionally accessed, the impedance of the temperature-sensing element is identified by monitoring voltage and current of a stator excitation input winding to further acquire the rotor temperature, so that the integrated detection on the motor rotor position and the rotor temperature is achieved.
Description
Technical field
The present invention relates to Electric Machine Control and detection technique field, be specifically related to a kind of resolver.
Background technology
In a lot of situation, electric machine control system needs to use rotor-position sensor to know that motor rotor position could realize the accurate control to motor.Sine-cosine revolver is wherein a kind of widely used rotor-position sensor, its working method is: its stators and rotators side is furnished with excitation input winding respectively and excitation receives winding, both looping transformers, the AC excitation voltage of certain frequency and amplitude is passed in its excitation input winding, receive in winding in excitation and can generate certain alternating voltage, for the rotor field coil in parallel with it is powered, carry out rotor-exciting, by be arranged in stator side mutually orthogonal just, cosine exports the position of winding sensing rotor field.
Simultaneously; under many circumstances; electric machine control system also needs the temperature information detecting rotor; carry out necessary derate or conservation treatment; in order to avoid the too high damage of rotor temperature rise is insulated or causes permanent magnet to demagnetize; the temperature of rotor detection mode of usual employing mostly needs extra temperature testing equipment, and this can make system complexity strengthen, and cost significantly increases.
Therefore, how to develop device that the rotor integrated position that a kind of structure is simple, cost is low, reliability is high and temperature of rotor detect and become a problem in the urgent need to address.
Summary of the invention
For the problem of existing electric machine control system existing for detect in the position of rotor and temperature information, order of the present invention be to provide a kind of can be used for rotor position and the resolver that detects of temperature information.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of resolver, described resolver at least comprises stators and rotators two parts, and described stators and rotators at least containing winding and ferromagnetic material, opens rotor field coil in described resolver respectively.
Preferably, described winding at least contains:
Be arranged in the excitation input winding on stator and epitrochanterian excitation reception winding for a pair respectively, both looping transformers;
One is arranged in epitrochanterian rotor field coil, receives winding be connected and powered by it with excitation;
What be arranged in stator for a pair exports winding for the mutually orthogonal sine sensing rotor field, and cosine exports winding;
Wherein stator side winding is provided with extraction line end in stator, and rotor-side excitation receives winding and is provided with extraction line end in rotor.
Preferably, described rotor field coil and excitation receive winding parallel.
Preferably, the rotor-side of described resolver is also containing a compensative winding from short circuit orthogonal with rotor field coil.
Preferably, the lead-out wire that described resolver rotor side excitation receives winding connects temperature-sensing element, and is its power supply, carries out non-contact detection to the temperature of rotor.
Scheme provided by the invention is on the basis of position sensing sine-cosine revolver structure, open rotor field coil, the impedance sensitive type temperature-sensing element of rotor is arranged in by access, rotor-position and the integrated detection of temperature of rotor can be realized, without the need to configuring extra temperature testing equipment again, whole system is had structure is simple, cost is low, reliability is high advantage.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
The electrical structure schematic diagram of resolver of Fig. 1 for providing in the embodiment of the present invention;
Fig. 2 is that in the embodiment of the present invention, resolver realizes rotor temp sensing function distribution schematic diagram.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
This example is by the basis of sine-cosine revolver structure, open rotor field coil, for accessing the impedance sensitive type temperature-sensing element being arranged in rotor, realizing rotor-position and the integrated detection of temperature of rotor with this, there is the advantage that structure is simple, cost is low, reliability is high simultaneously.
See Fig. 1, its be electrical structure schematic diagram for resolver in the present embodiment.Resolver mainly comprises with lower part as seen from the figure:
Containing stators and rotators two parts, and stators and rotators is respectively containing winding and ferromagnetic material.
Winding wherein contains:
Be arranged in the excitation input winding S1-S2 on stator and epitrochanterian excitation reception winding R1-R2 for a pair respectively, both looping transformers;
One is arranged in epitrochanterian rotor field coil R3-R4, in parallel with winding R1-R2, and by its power supply;
What be arranged in stator for a pair exports winding S3-S4 for the mutually orthogonal sine sensing rotor field, and cosine exports winding S5-S6;
Wherein stator side winding is provided with extraction line end in stator, for connecting external circuit, realizes being powered by external circuit; Rotor-side winding R1-R2 is provided with extraction line end in rotor, detects for realizing contactless temperature of rotor.
On this basis, this resolver also containing a compensative winding from short circuit orthogonal with rotor field coil, can improve further the reliability and stability of this resolver thus in its rotor-side.
Form resolver thus, rotor-position measuring ability will be had, can be used for sensing coaxial mounted motor rotor position.
When carrying out motor rotor position and detecting, in the excitation input winding S1-S2 first in resolver, pass to the AC excitation voltage of certain frequency and amplitude;
Thus, certain alternating voltage can be generated, for the rotor field coil in parallel with it is powered in excitation reception winding R1-R2;
Then, carry out rotor-exciting, by demodulation be arranged in stator side mutually orthogonal just, cosine exports the output voltage signal of winding S3-S4, S5-S6, obtains the positional information of rotor.
Further, receive winding because this resolver has opened rotor-side excitation simultaneously, make it have temperature of rotor measuring ability simultaneously, and be contactless detection mode.
For this reason, this resolver utilizes open rotor-side excitation to receive winding (its extraction line end established on rotor), extra access is arranged in the temperature-sensing element of coaxial rotor side, by voltage, the electric current of monitoring stator excitation input winding, identify temperature-sensing element impedance, and then acquisition temperature of rotor, thus realize the integrated detection of motor rotor position and temperature of rotor.
See Fig. 2, it is depicted as based on above-mentioned principle, utilizes this resolver to realize rotor temp sensing function distribution schematic diagram.
As seen from the figure, the lead-out wire receiving winding R1-R2 in this rotary transformer rotor excitation is connected with the impedance sensitive type temperature-sensing element 200 be fixed on coaxial motor rotor 100, and is its power supply.
Wherein, the present embodiment uses temperature-sensing element 200 to be negative tempperature coefficient thermistor (NTC).
Thus, can rely on detect excitation input winding S1-S2 in resolver voltage, electric current to identify that rotor-exciting receives the impedance that winding institute accesses temperature-sensing element, and according to its temperature resistance characteristic acquisition temperature of rotor.
Based on such scheme formed resolver by rotor integrated position and temperature of rotor measuring ability.Its at the same time use location detect and temperature of rotor function time, its stator excitation input winding current will containing two components, one of them component is rotor excitation current, and this component remains unchanged in the course of the work substantially; Another component is rotor temperature-sensing element load current, is the actual current flowing through temperature-sensing element converts excitation winding supply current by transformer principle.
Thus by monitoring rotor temperature-sensing element load current, and the input voltage of input excitation winding, according to transformer impedance transformation relation, the impedance of rotor temperature-sensing element can be obtained, then obtain temperature of rotor according to its temperature resistance characteristic.
Particularly, mark excitation input winding alternating voltage is Vs, and the function of excitation input winding rotor temperature-sensing element load current component to be the resistance of Is_ntc, NTC be temperature t, is designated as R
ntc(t), the voltage change ratio that rotor-exciting receives winding and stator excitation input winding is Nr/Ns, can obtain according to transformer impedance shift theory:
R
ntc(t)＝(Nr/Ns)^2×(Vs/Is_ntc)
Therefore, by voltage, the electric current of observation excitation input winding, just R can be calculated by above-mentioned formula
ntct the value of (), by the temperature characteristics of NTC, tables look-up or calculates the temperature of rotor t that can draw near NTC.
As from the foregoing, this resolver realizes rotor-position and the integrated detection of temperature of rotor, and has the advantage that structure is simple, cost is low, reliability is high.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1. a resolver, described resolver at least comprises stators and rotators two parts, and described stators and rotators at least containing winding and ferromagnetic material, is characterized in that respectively, open rotor field coil in described resolver.
2. a kind of resolver according to claim 1, is characterized in that, described winding at least contains:
Be arranged in the excitation input winding on stator and epitrochanterian excitation reception winding for a pair respectively, both looping transformers;
One is arranged in epitrochanterian rotor field coil, receives winding be connected and powered by it with excitation;
What be arranged in stator for a pair exports winding for the mutually orthogonal sine sensing rotor field, and cosine exports winding;
Wherein stator side winding is provided with extraction line end in stator, and rotor-side excitation receives winding and is provided with extraction line end in rotor.
3. a kind of resolver according to claim 2, is characterized in that, described rotor field coil and excitation receive winding parallel.
4. a kind of resolver according to claim 2, is characterized in that, the rotor-side of described resolver is also containing a compensative winding from short circuit orthogonal with rotor field coil.
5. a kind of resolver according to claim 1 and 2, is characterized in that, the lead-out wire that described resolver rotor side excitation receives winding connects temperature-sensing element, and is its power supply, carries out non-contact detection to the temperature of rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610020425.8A CN105469966A (en) | 2016-01-12 | 2016-01-12 | Rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610020425.8A CN105469966A (en) | 2016-01-12 | 2016-01-12 | Rotary transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105469966A true CN105469966A (en) | 2016-04-06 |
Family
ID=55607571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610020425.8A Pending CN105469966A (en) | 2016-01-12 | 2016-01-12 | Rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105469966A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616304A (en) * | 2018-12-18 | 2019-04-12 | 北京遥感设备研究所 | A kind of small rotary transformer and its application method |
| CN109974781A (en) * | 2019-04-04 | 2019-07-05 | 东莞中铜电动汽车有限公司 | The apparatus and system that contactless motor rotor temperature and position measure simultaneously |
| CN112485460A (en) * | 2020-11-17 | 2021-03-12 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
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|---|---|---|---|---|
| CN1835351A (en) * | 2006-03-08 | 2006-09-20 | 南京航空航天大学 | Synchrous dynamo exciter of rotatable power electronic converter |
| CN201184827Y (en) * | 2008-04-09 | 2009-01-21 | 哈尔滨电机厂有限责任公司 | Apparatus for detecting temperature of hydraulic generator rotor coil |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN202713106U (en) * | 2012-06-29 | 2013-01-30 | 上海博建电子科技有限公司 | External rotor type permanent magnet motor provided with rotor position sensor and servo motor system |
| JP2013021749A (en) * | 2011-07-07 | 2013-01-31 | Toyota Motor Corp | Rotary electric machine system |
| CN103001399A (en) * | 2012-12-13 | 2013-03-27 | 中国矿业大学 | Alternating current motor capable of achieving self-testing of rotor temperatures |
| CN103078571A (en) * | 2013-01-04 | 2013-05-01 | 天津清源电动车辆有限责任公司 | Rotary transformer system and control method thereof |
| CN104702173A (en) * | 2015-04-02 | 2015-06-10 | 奇瑞汽车股份有限公司 | Detecting system and method for position of rotor of rotary transformer |
-
2016
- 2016-01-12 CN CN201610020425.8A patent/CN105469966A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835351A (en) * | 2006-03-08 | 2006-09-20 | 南京航空航天大学 | Synchrous dynamo exciter of rotatable power electronic converter |
| CN201184827Y (en) * | 2008-04-09 | 2009-01-21 | 哈尔滨电机厂有限责任公司 | Apparatus for detecting temperature of hydraulic generator rotor coil |
| JP2013021749A (en) * | 2011-07-07 | 2013-01-31 | Toyota Motor Corp | Rotary electric machine system |
| CN102661754A (en) * | 2012-05-09 | 2012-09-12 | 合肥工业大学 | Digital converter for rotary transformer |
| CN202713106U (en) * | 2012-06-29 | 2013-01-30 | 上海博建电子科技有限公司 | External rotor type permanent magnet motor provided with rotor position sensor and servo motor system |
| CN103001399A (en) * | 2012-12-13 | 2013-03-27 | 中国矿业大学 | Alternating current motor capable of achieving self-testing of rotor temperatures |
| CN103078571A (en) * | 2013-01-04 | 2013-05-01 | 天津清源电动车辆有限责任公司 | Rotary transformer system and control method thereof |
| CN104702173A (en) * | 2015-04-02 | 2015-06-10 | 奇瑞汽车股份有限公司 | Detecting system and method for position of rotor of rotary transformer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616304A (en) * | 2018-12-18 | 2019-04-12 | 北京遥感设备研究所 | A kind of small rotary transformer and its application method |
| CN109974781A (en) * | 2019-04-04 | 2019-07-05 | 东莞中铜电动汽车有限公司 | The apparatus and system that contactless motor rotor temperature and position measure simultaneously |
| CN112485460A (en) * | 2020-11-17 | 2021-03-12 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
| CN112485460B (en) * | 2020-11-17 | 2022-11-04 | 上海吉亿电机有限公司 | Signal acquisition and compensation method for rotary transformer |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20171123 Address after: 201615 Shanghai, Songjiang District, No. nine new road, No. 99 Applicant after: Yungtay elevator equipment Co., Ltd. (China) Address before: 201615 Shanghai city Songjiang District town Jiuting Yaohan Road No. 77 Applicant before: Shanghai GIE EM Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160406 |
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| RJ01 | Rejection of invention patent application after publication |