CN211178307U - Reluctance type angle sensor - Google Patents
Reluctance type angle sensor Download PDFInfo
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- CN211178307U CN211178307U CN201922230721.2U CN201922230721U CN211178307U CN 211178307 U CN211178307 U CN 211178307U CN 201922230721 U CN201922230721 U CN 201922230721U CN 211178307 U CN211178307 U CN 211178307U
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Abstract
A magnetic resistance type angle sensor solves the problems of low angle measurement precision, weak shock and vibration resistance and poor stability in the prior art. Including the resolver overcoat, its characterized in that: an outer lead, an inner lead and an excitation winding are respectively arranged in the outer sleeve of the rotary transformer; a rotary transformer middle shaft is also arranged in the rotary transformer outer sleeve, and a lead is arranged on the rotary transformer outer sleeve; the magnetic resistance type angle sensor is a 10-pair-pole magnetic resistance type rotary transformer, and an excitation winding and an output winding of the magnetic resistance type angle sensor are placed in the same set of stator slots and are fixed. The angle measurement device has the advantages of reasonable design, compact structure, high angle measurement precision, strong shock and vibration resistance and good stability, and can adapt to various environments such as high temperature, low temperature and the like.
Description
Technical Field
The utility model belongs to the technical field of measuring sensor, concretely relates to angle measurement accuracy is high, and shock-resistant vibration ability is strong, and stability is good, can adapt to the reluctance type angle sensor of multiple environment such as high low temperature.
Background
The angle sensor is a commonly used geometric quantity sensor and is widely used in many fields such as aerospace, industrial production, mechanical manufacturing, military science and the like. At present, the reluctance type rotary transformer used in the market is generally directly led out or provided with a binding post on a framework, and compared with the former, the latter realizes the change of replacing manual wiring by a welding lead-out wire, but the welding lead-out wire also needs manual operation, the welding quality is not reliable, and the automatic production cannot be realized. In addition, the existing angle sensor also has the problems of limited amplification factor, poor applicability to special application occasions and low measurement precision. There is a need for an improved prior art angle sensor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to above-mentioned problem, provide an angle measurement accuracy height, shock-resistant vibration ability is strong, and stability is good, can adapt to the reluctance type angle sensor of multiple environment such as high low temperature.
The utility model adopts the technical proposal that: this magnetic resistance formula angle sensor includes resolver overcoat, its characterized in that: an outer lead, an inner lead and an excitation winding are respectively arranged inside the outer sleeve of the rotary transformer; a rotary transformer middle shaft is also arranged in the rotary transformer outer sleeve, and a lead is arranged on the rotary transformer outer sleeve; the magnetic resistance type angle sensor is a 10-antipodal magnetic resistance type rotary transformer, and an excitation winding and an output winding of the magnetic resistance type angle sensor are placed in the same set of stator slots and are fixed.
The forms of the excitation winding and the output winding are different; the output signals of the two-phase windings are still electric signals which are subjected to sinusoidal change along with the rotation angle and have 90-degree electric angle difference with each other; the shape of the magnetic poles of the rotor is specially designed, so that the air gap magnetic field is approximate to a sine shape.
The excitation winding is supplied by a single-phase voltage, which can be written as follows:
in the formula of U1m-the amplitude of the excitation voltage, ω -the angular frequency of the excitation voltage; the alternating magnetic flux generated by the exciting current of the exciting winding induces electromotive force in the secondary output winding; due to excitation winding and secondary output winding when rotor is rotatingThe relative position changes, so the electromotive force induced by the secondary output winding also changes;
meanwhile, since the two-phase windings of the secondary output are at orthogonal 90 ° electrical angle in space, the two-phase output voltages are as follows:
in the formula of U2FsOutput voltage of sinusoidal phase, U2FcOutput voltage of cosine phase, U2FmAmplitude of the secondary output voltage, αFPhase angle between excitation side and secondary output side voltage, thetaF-the rotation angle of the transmitter rotor.
The utility model has the advantages that: because the utility model adopts the rotary transformer coat which is internally provided with the outer lead, the inner lead and the excitation winding respectively; a rotary transformer middle shaft is also arranged in the rotary transformer outer sleeve, and a lead is arranged on the rotary transformer outer sleeve; the magnetic resistance type angle sensor is a 10-antipodal magnetic resistance type rotary transformer, and an excitation winding and an output winding of the magnetic resistance type angle sensor are placed in the same set of stator slots and are fixed, so that the magnetic resistance type angle sensor is reasonable in design, compact in structure, high in angle measurement precision, strong in impact and vibration resistance, good in stability and capable of adapting to various environments such as high temperature and low temperature.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of fig. 1.
The sequence numbers in the figures illustrate: 1 lead, 2 rotary transformer axis, 3 rotary transformer overcoat, 4 outer wire, 5 inner wire.
Detailed Description
The detailed description of the present invention is provided. The magnetic resistance type angle sensor comprises a rotary transformer outer sleeve 3, wherein an outer lead 4, an inner lead 5 and an excitation winding are respectively arranged inside the rotary transformer outer sleeve 3; a rotary transformer middle shaft 2 is also arranged in the rotary transformer outer sleeve 3, and a lead 1 is arranged on the rotary transformer outer sleeve 3; the magnetic resistance type angle sensor is a 10-antipodal magnetic resistance type rotary transformer, and an excitation winding and an output winding of the magnetic resistance type angle sensor are placed in the same set of stator slots and are fixed. The forms of the excitation winding and the output winding are different; the output signals of the two-phase windings are still electric signals which are subjected to sinusoidal change along with the rotation angle and have 90-degree electric angle difference with each other; the shape of the magnetic poles of the rotor is specially designed, so that the air gap magnetic field is approximate to a sine shape. The rotor shape must also be designed to meet the required number of poles. It can be appreciated that the shape of the rotor determines the number of pole pairs and the shape of the air gap field.
The field winding is supplied by a single-phase voltage, which can be written as follows:
in the formula of U1m-the amplitude of the excitation voltage, ω -the angular frequency of the excitation voltage; the alternating magnetic flux generated by the exciting current of the exciting winding induces electromotive force in the secondary output winding; when the rotor rotates, the relative position of the excitation winding and the secondary output winding changes, so that the electromotive force induced by the secondary output winding also changes;
meanwhile, since the two-phase windings of the secondary output are at orthogonal 90 ° electrical angle in space, the two-phase output voltages are as follows:
in the formula of U2FsOutput voltage of sinusoidal phase, U2FcOutput voltage of cosine phase, U2FmAmplitude of the secondary output voltage, αFPhase angle between excitation side and secondary output side voltage, thetaF-the rotation angle of the transmitter rotor.
The rotary transformer comprises three windings, namely one rotor winding and two stator windings. The rotor winding rotates along with the motor, the stator winding is fixed in position, and the two stators form a 90-degree angle with each other. The windings thus form a transformer with an angle-dependent coefficient. The sinusoidal carrier applied to the rotor windings is coupled to the stator windings and the stator winding outputs are amplitude modulated in relation to the rotor winding angle. Due to the mounting position, the phase difference of the modulated output signals of the two stator windings is 90 degrees. The angular position information of the motor can be obtained by demodulating two signals, firstly, a pure sine wave and a cosine wave are received, then the pure sine wave and the cosine wave are divided to obtain a tangent value of the angle, and finally, the angle value is obtained through an 'arctangent' function. Since the arithmetic processing is generally performed using a DSP, it is necessary to digitize sine and cosine waves.
Claims (3)
1. A magnetoresistive angle sensor comprising a resolver housing (3), characterized in that: an outer lead (4), an inner lead (5) and an excitation winding are respectively arranged in the rotary transformer outer sleeve (3); a rotary transformer middle shaft (2) is also arranged in the rotary transformer outer sleeve (3), and a lead (1) is arranged on the rotary transformer outer sleeve (3); the magnetic resistance type angle sensor is a 10-pair-pole magnetic resistance type rotary transformer, and an excitation winding and an output winding of the magnetic resistance type angle sensor are placed in the same set of stator slots and are fixed.
2. A magnetoresistive angle sensor according to claim 1, characterized in that: the forms of the excitation winding and the output winding are different; the output signals of the two phase windings are still electrical signals which vary sinusoidally with the rotation angle by 90 ° electrical angle.
3. A magnetoresistive angle sensor according to claim 1, characterized in that: the excitation winding is supplied by a single-phase voltage, which can be written as follows:
in the formula of U1m-the amplitude of the excitation voltage, ω -the angular frequency of the excitation voltage; excitation windingThe alternating magnetic flux generated by the exciting current of the group induces an electromotive force in the secondary output winding; when the rotor rotates, the relative position of the excitation winding and the secondary output winding changes, so that the electromotive force induced by the secondary output winding also changes;
meanwhile, since the two-phase windings of the secondary output are at orthogonal 90 ° electrical angle in space, the two-phase output voltages are as follows:
in the formula of U2FsOutput voltage of sinusoidal phase, U2FcOutput voltage of cosine phase, U2FmAmplitude of the secondary output voltage, αFPhase angle between excitation side and secondary output side voltage, thetaF-the rotation angle of the transmitter rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230721.2U CN211178307U (en) | 2019-12-13 | 2019-12-13 | Reluctance type angle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922230721.2U CN211178307U (en) | 2019-12-13 | 2019-12-13 | Reluctance type angle sensor |
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| Publication Number | Publication Date |
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| CN211178307U true CN211178307U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922230721.2U Active CN211178307U (en) | 2019-12-13 | 2019-12-13 | Reluctance type angle sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388758A (en) * | 2022-08-19 | 2022-11-25 | 重庆科技学院 | Method for monitoring angle change of hanger rod of self-anchored track suspension bridge structure |
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2019
- 2019-12-13 CN CN201922230721.2U patent/CN211178307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388758A (en) * | 2022-08-19 | 2022-11-25 | 重庆科技学院 | Method for monitoring angle change of hanger rod of self-anchored track suspension bridge structure |
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