CN104702173A - Detecting system and method for position of rotor of rotary transformer - Google Patents
Detecting system and method for position of rotor of rotary transformer Download PDFInfo
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- CN104702173A CN104702173A CN201510155797.7A CN201510155797A CN104702173A CN 104702173 A CN104702173 A CN 104702173A CN 201510155797 A CN201510155797 A CN 201510155797A CN 104702173 A CN104702173 A CN 104702173A
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 69
- 230000005284 excitation Effects 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 claims description 6
- 230000036541 health Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 abstract 1
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- 230000002093 peripheral effect Effects 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
Abstract
The invention relates to a detecting system and method for the position of a rotor of a rotary transformer, and belongs to the technical fields of signal detection and electric vehicle motor driving. The detecting system comprises a DSP signal processing module, a sine excitation conditioning unit, the rotary transformer and a rotor position signal conditioning unit. A sine excitation signal is generated by the DSP signal processing module and input to the sine excitation conditioning unit. After processing is carried out through the sine excitation conditioning unit, an excitation signal is output to the rotary transformer, and a sine signal and a cosine signal which are output by the rotary transformer are input to the rotor position signal conditioning unit. After processing is carried out through the rotor position signal conditioning unit, an output rotor position angle signal is input to the DSP signal processing module. The detecting system is mainly formed by common electronic elements such as resistors, capacitors and operational amplifiers; compared with a special decoding chip, cost is greatly reduced, and the problems that as for a decoding chip for the rotary transformer in the prior art, the model is single, the price is high, an interface circuit is complex, and the use flexibility is not high are solved.
Description
Technical field
The invention belongs to input and motor in electric automobile Driving technique field, relate to permanent-magnet brushless DC electric machine rotor-position detection side to, a kind of particularly detection system of rotary transformer rotor position and method.
Background technology
Permagnetic synchronous motor has that structure is simple, volume is little, lightweight, loss is little, efficiency advantages of higher, the fields such as extensive use plant equipment, Aero-Space, elevator, household electrical appliance, navigation and electric automobile.Permagnetic synchronous motor is as servo and drive actuator, and controller needs to regulate system parameters according to the difference of the actual position signal of given position signalling and system feedback and realizes the accurate control of system.Therefore, the servo position detection system meeting certain precision and rate request is requisite.Position probing depends on position transducer, and resolver has that shock resistance is good, reliable operation, life-span are long, to machinery and electrical noise insensitive, corrosion-resistant, high temperature resistant and easily realize the advantages such as high speed position detection, be applicable to very much needs and respond fast and anti-impact requires high speed governing.
But, the output of resolver is the high frequency modulated analog signal that two-way comprises absolute location information, directly cannot be used by digital signal processor, therefore must decode to obtain rotor absolute position digital signal to it, just can be input in the controller such as single-chip microcomputer or DSP.At present, special decoding chip is mostly adopted the output signal of resolver to be carried out to the parsing of angle in actual applications, although special decoding chip technology maturation, also higher precision and good performance can be arrived, but it is expensive, interface circuit is also complicated, is difficult to extensive use there being the occasion of strict demand to cost.
Summary of the invention
In order to overcome in prior art, resolver decoding chip model is single, price is high, interface circuit is complicated and use flexibility not high, the deficiency that the angle affecting rotor-position detects, the invention provides a kind of detection system and method for rotary transformer rotor position, have that cost is low, good stability, the advantage such as simple.
Technical scheme of the present invention is: a kind of detection system of rotary transformer rotor position, described detection system comprises DSP signal processing module, sinusoidal excitation conditioning unit, resolver and rotor-position signal conditioning unit, DSP signal processing module produces sinusoidal excitation signal and is input to sinusoidal excitation conditioning unit, after the process of sinusoidal excitation conditioning unit, output drive signal is to resolver, resolver is just exporting, cosine signal is input to rotor-position signal conditioning unit, the rotor position angle signal exported after the process of rotor-position signal conditioning unit inputs to DSP signal processing module.
Described DSP signal processing module comprises the sinusoidal signal generating unit, AD collecting unit and the DSP processing unit that generate sinusoidal signal, the sinusoidal signal connection that sinusoidal signal generating unit generates is input to sinusoidal excitation conditioning unit, the input of AD collecting unit connects rotor-position signal conditioning unit, and the digital signal after the conversion of AD collecting unit inputs to DSP processing unit.Described sinusoidal excitation conditioning unit comprises amplifying circuit, filter circuit and push-pull circuit, and amplifying circuit connects filter circuit, and filter circuit connects push-pull circuit.Described resolver is the electric position sensor gathering rotor-position signal.
A detection method for rotary transformer rotor position, described step comprises: the amplitude that step one, sinusoidal signal generating unit generate sinusoidal signal Ug, sinusoidal signal Ug is 1/2Um, and sinusoidal signal is input to sinusoidal excitation conditioning unit; The sinusoidal signal of input carries out amplifying by step 2, sinusoidal excitation conditioning unit, filtering and recommend process, and signal Ug nurses one's health the signal Us for amplitude Um, and sinusoidal excitation conditioning unit output drive signal Us is to R1 and the R2 input of resolver; Step 3, resolver receive after pumping signal Us, export about rotor-position signal just, cosine differential signal, the maximum amplitude of differential signal is Um, and cosine and sine signal exports rotor-position signal conditioning unit to; The cosine and sine signal of input is nursed one's health into rotor position angle signal by step 4, rotor-position signal conditioning unit, and rotor position angle signal exports AD collecting unit to; After step 5, AD collecting unit receive rotor position angle signal, analog signal is converted to digital signal and exports DSP processing unit to; Step 6, the DSP processing unit digital signal to input carries out filtering and position angle arctangent cp cp operation, parses position angle θ.
In described step 3 just, cosine differential signal expression formula is: U
sin1=U
msin ω t*sin θ and U
cos1=U
msin ω t*cos θ, wherein U
sin1and U
cos1represent cosine and sine signal, U
mfor the maximum amplitude of output signal, ω is the angular frequency of pumping signal, and θ is rotor position angle.Rotor position angle signal in described step 4 obtains expression formula:
and
u
sin2and U
cos2represent rotor position angle signal, Un is AD collecting unit operating voltage, and ω is the angular frequency of signal, and θ is rotor position angle.The AD collecting unit of described step 5 and step 6 and DSP processing unit belong to the part in DSP signal processing module, and step 5 and step 6 are carried out in DSP signal processing module.
The present invention has following good effect: 1. in the present invention, main control chip is integrated with sinusoidal signal generating unit, AD collecting unit and DSP signal processing module, only there are sinusoidal excitation conditioning unit and rotor-position signal conditioning unit in outside, and matched interfaces circuit is very simple.2. the sinusoidal excitation conditioning unit in the present invention and rotor-position signal conditioning unit are made up of electronic components such as the resistance commonly used, electric capacity and amplifiers, compared with special decoding chip, greatly reduce cost.3. the rotor-position coding/decoding method based on resolver in the present invention is verified after tested, location resolution precision basic close to special decoding chip decode precision, most instructions for use can be met.4. after AD sampling, input DSP based on the rotor-position signal of resolver in the present invention and carry out process computing, user can process signal for different instructions for uses, uses very flexible.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the detection system of rotary transformer rotor position in the present invention;
Fig. 2 is the output signal schematic diagram of each unit in detection system in the present invention;
Fig. 3 is the circuit working schematic diagram of sinusoidal excitation conditioning unit in the present invention;
Fig. 4 is the circuit working schematic diagram of rotor position signalling conditioning unit of the present invention.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
A kind of detection system of rotary transformer rotor position, its structure principle chart as shown in Figure 1, detection system comprises DSP signal processing module, sinusoidal excitation conditioning unit, resolver and rotor-position signal conditioning unit, and the internal resources such as RAM, Flash that DSP signal processing module is possessed by sinusoidal signal generating unit, AD collecting unit, DSP processing unit and main control chip and peripheral support circuit are formed.Sinusoidal signal generating unit in DSP signal processing module produces sinusoidal excitation signal and is input to sinusoidal excitation conditioning unit, after the process of sinusoidal excitation conditioning unit, output drive signal is to resolver, resolver is just exporting, cosine signal is input to rotor-position signal conditioning unit, the rotor position angle signal exported after the process of rotor-position signal conditioning unit inputs to the AD collecting unit in DSP signal processing module, the effect of AD collecting unit includes position signal acquisition function and AD conversion function, the conversion of position signal acquisition and data can be carried out, digital signal after the conversion of AD collecting unit inputs to DSP processing unit.
Sinusoidal signal generating unit in DSP signal processing module is the signal source of resolver excitation input, produces the Ug sinusoidal signal that amplitude is 0-Vcc,
wherein Vcc is sinusoidal signal generating unit operating voltage, and ω is the angular frequency of pumping signal, and the peak-to-peak value of sinusoidal signal Ug is Um, and the output signal schematic diagram of each unit of detection system as shown in Figure 2.
Sinusoidal signal is input to sinusoidal excitation conditioning unit, sinusoidal excitation conditioning unit is used for the sinusoidal excitation input signal that sinusoidal signal generating unit produces to carry out amplifying, filtering and recommend output processing, signal after conditioning is as the pumping signal of resolver, export the resolver pumping signal Us that peak-to-peak value (Vpp) is 2Um, pumping signal Us exports R1 and the R2 input of resolver to, makes transformer export the analog signal with rotor position information.The circuit working schematic diagram of sinusoidal excitation conditioning unit as shown in Figure 3, the circuit of sinusoidal excitation conditioning unit is primarily of three operational amplifiers U2C, U3C, U2B and peripheral circuit composition thereof, positive input No. 5 pins of amplifier U3C connect the output of DSP signal processing module by resistance R13, No. 6 pins of amplifier U3C are connected on No. 7 pins of self, electric capacity C5 and resistance R14, the resistance R14 of No. 7 pins connection series connection of amplifier U3C are connected to No. 5 pins of amplifier U2C and No. 2 pins of amplifier U2B simultaneously.The peripheral circuit of amplifier U2C is similar with the peripheral circuit of amplifier U2B, the negative-feedback circuit of resistance and electric capacity in parallel composition is all connected with between negative input and output, the output of amplifier is connected with resistance, the condenser network of series connection ground connection, there is certain Anti-Jamming, output is connected on resolver by contact resistance, inductance, circuit, ensure the stabilization signal exported, the positive input of amplifier U2B is connected to power supply VCC simultaneously by electric capacity C9 ground connection by resistance R18.
Resolver is for being arranged on electric position sensor on brushless electric machine, for gathering the rotor-position signal of brushless electric motor rotor, resolver under the effect of pumping signal Us, export reflection rotor-position signal and have orthogonality relation just, cosine differential signal: U
sin1=U
msin ω t*sin θ and U
cos1=U
msin ω t*cos θ, wherein U
sin1and U
cos1represent cosine and sine signal, U
mfor the maximum amplitude of output signal, ω is the angular frequency of pumping signal, and θ is rotor position angle, and t is the time, and cosine and sine signal exports rotor-position signal conditioning unit to.
Rotor-position signal conditioning unit, rotor-position analog signal for receiving carries out amplitude transformation, analog signal is converted to AD collecting unit and can gather identification, voltage signal in working range, the circuit working schematic diagram of rotor-position signal conditioning unit as shown in Figure 4, circuit same major calculations amplifier U1C and U1B of rotor-position signal conditioning and peripheral circuit composition thereof, amplifier U1C connects the signal output part S1 of resolver by resistance R1, amplifier U1B connects the signal output part S3 of resolver by resistance R5, signal output part S1, a resistance R5 is connected between S3.Amplifier U1C connects a resistive degeneration circuit, and output No. 7 pin contact resistance R2 are to the output of rotor-position signal conditioning unit, and the other end of resistance R2 connects diode to power supply simultaneously, and the other end of resistance R2 connects capacity earth simultaneously.The negative input of amplifier U1B connects output, corresponding positive input contact resistance R7 is to power supply, positive input is connected to resistance capacitance earthed circuit in parallel simultaneously, rotor-position signal modulate circuit is mainly used in the rotor-position analog signal received to carry out amplitude transformation, analog signal is converted to AD collecting unit and can gather voltage signal in identification, working range.
Cosine and sine signal U
sin1and U
cos1input to rotor-position signal conditioning unit, by U
sin1=U
msin ω t*sin θ and U
cos1=U
msin ω t*cos θ input signal conditioning becomes
And
Rotor position angle signal, wherein U
nfor the operating voltage of AD collecting unit.Rotor-position signal conditioning unit inputs to AD collecting unit, by rotor-position analog signal by AD collecting unit, convert analog signal to digital signal, input to DSP processing unit, the signal of DSP to input carries out filtering and position angle arctangent cp cp operation, parse position angle θ, thus obtain rotor position angle.
A detection method for rotary transformer rotor position, step comprises:
The amplitude that step one, sinusoidal signal generating unit generate sinusoidal signal Ug, sinusoidal signal Ug is 1/2Um, and sinusoidal signal is input to sinusoidal excitation conditioning unit.
The sinusoidal signal of input carries out amplifying by step 2, sinusoidal excitation conditioning unit, filtering and recommend process, and signal Ug nurses one's health the signal Us for amplitude Um, and sinusoidal excitation conditioning unit output drive signal Us is to resolver.
Step 3, resolver receive after pumping signal Us, export about rotor-position signal just, cosine differential signal, cosine and sine signal exports rotor-position signal conditioning unit to, and just, cosine differential signal expression formula is: U
sin1=U
msin ω t*sin θ and U
cos1=U
msin ω t*cos θ, wherein U
sin1and U
cos1represent cosine and sine signal, U
mfor the maximum amplitude of output signal, ω is the angular frequency of pumping signal, and θ is rotor position angle.
The cosine and sine signal of input is nursed one's health into rotor position angle signal by step 4, rotor-position signal conditioning unit, rotor-position signal conditioning unit is used for the rotor-position analog signal received to carry out amplitude transformation, analog signal is converted to AD collecting unit and can gather voltage signal in identification, working range.The expression formula of rotor position angle signal is:
And
U
sin2and U
cos2represent rotor position angle signal, Un is AD collecting unit operating voltage, and ω is the angular frequency of signal, and θ is rotor position angle, and rotor position angle signal exports AD collecting unit to.
After step 5, AD collecting unit receive rotor position angle signal, analog signal is converted to digital signal and exports DSP processing unit to.
Step 6, the DSP processing unit digital signal to input carries out filtering and position angle arctangent cp cp operation, parses position angle θ.The AD collecting unit of step 5 and step 6 and DSP processing unit belong to the part in DSP signal processing module, and step 5 and step 6 are carried out in DSP signal processing module.
During rotary transformer rotor method for detecting position work provided by the invention, sinusoidal signal generating unit produces
sinusoidal excitation signal, wherein Vcc is sinusoidal signal generating unit operating voltage, and ω is the angular frequency of pumping signal.Sinusoidal signal amplitude and the power output of the generation of sinusoidal signal generating unit are less, are not suitable for Direct driver resolver, after the Ug of input is carried out amplification and filtering by sinusoidal excitation modulate circuit, recommend and export U
s=U
msin ω t signal, wherein U
mfor the maximum amplitude of output signal.Sinusoidal excitation conditioning unit drives resolver to export two paths of signals, S1 and S3 exports U
sin1=U
mthe sinusoidal alternating signal of sin ω t*sin θ, S2 and S4 exports U
cos1=U
mthe cosine alternating signal of sin ω t*cos θ, output just, cosine alternating signal has position of rotor of brushless motor information.The U that S1 and S3 exports
sin1the U exported with S2 and S4
cos1cosine and sine signal input to rotor-position signal conditioning unit respectively, after carrying out common mode disturbances suppression through rotor-position signal conditioning unit, comparing and amplify, export
and
rotor position angle signal, wherein U
nfor AD collecting unit operating voltage.Position signalling conditioning unit exports U
sin2and U
cos2input to AD collecting unit respectively, the sine and cosine alternate mode analog signal with positional information is converted to digital signal, and input to DSP processing unit and carry out filtering and arctangent cp cp operation, calculate rotor position angle θ, the present invention have use cost low, use flexibly, good stability, simple, resolve the advantages such as precision is basic consistent with special decoding chip.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (8)
1. the detection system of a rotary transformer rotor position, it is characterized in that, described detection system comprises DSP signal processing module, sinusoidal excitation conditioning unit, resolver and rotor-position signal conditioning unit, DSP signal processing module produces sinusoidal excitation signal and is input to sinusoidal excitation conditioning unit, after the process of sinusoidal excitation conditioning unit, output drive signal is to resolver, resolver is just exporting, cosine signal is input to rotor-position signal conditioning unit, the rotor position angle signal exported after the process of rotor-position signal conditioning unit inputs to DSP signal processing module.
2. the detection system of rotary transformer rotor position according to claim 1, it is characterized in that, described DSP signal processing module comprises the sinusoidal signal generating unit, AD collecting unit and the DSP processing unit that generate sinusoidal signal, the sinusoidal signal connection that sinusoidal signal generating unit generates is input to sinusoidal excitation conditioning unit, the input of AD collecting unit connects rotor-position signal conditioning unit, and the digital signal after the conversion of AD collecting unit inputs to DSP processing unit.
3. the detection system of rotary transformer rotor position according to claim 1, is characterized in that, described sinusoidal excitation conditioning unit comprises amplifying circuit, filter circuit and push-pull circuit, and amplifying circuit connects filter circuit, and filter circuit connects push-pull circuit.
4. the detection system of rotary transformer rotor position according to claim 1, is characterized in that, described resolver is the electric position sensor gathering rotor-position signal.
5. a detection method for rotary transformer rotor position, is characterized in that, described step comprises:
The amplitude that step one, sinusoidal signal generating unit generate sinusoidal signal Ug, sinusoidal signal Ug is 1/2Um, and sinusoidal signal is input to sinusoidal excitation conditioning unit;
The sinusoidal signal of input carries out amplifying by step 2, sinusoidal excitation conditioning unit, filtering and recommend process, and signal Ug nurses one's health the signal Us for amplitude Um, and sinusoidal excitation conditioning unit output drive signal Us is to R1 and the R2 input of resolver;
Step 3, resolver receive after pumping signal Us, export about rotor-position signal just, cosine differential signal, the maximum amplitude of differential signal is Um, and cosine and sine signal exports rotor-position signal conditioning unit to;
The cosine and sine signal of input is nursed one's health into rotor position angle signal by step 4, rotor-position signal conditioning unit, and rotor position angle signal exports AD collecting unit to;
After step 5, AD collecting unit receive rotor position angle signal, analog signal is converted to digital signal and exports DSP processing unit to;
Step 6, the DSP processing unit digital signal to input carries out filtering and position angle arctangent cp cp operation, parses position angle θ.
6. the detection method of rotary transformer rotor position according to claim 4, is characterized in that, in described step 3 just, cosine differential signal expression formula is: U
sin1=U
msin ω t*sin θ and U
cos1=U
msin ω t*cos θ, wherein U
sin1and U
cos1represent cosine and sine signal, U
mfor the maximum amplitude of output signal, ω is the angular frequency of pumping signal, and θ is rotor position angle.
7. the detection method of rotary transformer rotor position according to claim 4, is characterized in that, the rotor position angle signal in described step 4 obtains expression formula and is:
and
u
sin2and U
cos2represent rotor position angle signal, Un is AD collecting unit operating voltage, and ω is the angular frequency of signal, and θ is rotor position angle.
8. the detection method of rotary transformer rotor position according to claim 4, it is characterized in that, the AD collecting unit of described step 5 and step 6 and DSP processing unit belong to the part in DSP signal processing module, and step 5 and step 6 are carried out in DSP signal processing module.
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| CN201510155797.7A CN104702173A (en) | 2015-04-02 | 2015-04-02 | Detecting system and method for position of rotor of rotary transformer |
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|---|---|---|---|
| CN201510155797.7A CN104702173A (en) | 2015-04-02 | 2015-04-02 | Detecting system and method for position of rotor of rotary transformer |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965462A (en) * | 2015-06-30 | 2015-10-07 | 奇瑞汽车股份有限公司 | Sensing detection system |
| CN105137868A (en) * | 2015-09-17 | 2015-12-09 | 成都思邦力克科技有限公司 | Signal simulator |
| CN105180974A (en) * | 2015-08-31 | 2015-12-23 | 奇瑞汽车股份有限公司 | Rotary transformer decoding interface circuit |
| CN105203020A (en) * | 2015-09-23 | 2015-12-30 | 河北汉光重工有限责任公司 | Rotary transformer demodulation device for excitation synchronization |
| CN105222814A (en) * | 2015-11-04 | 2016-01-06 | 上海无线电设备研究所 | Multi-turn memory rotary transformer decoding circuit and position calculation method thereof |
| CN105469966A (en) * | 2016-01-12 | 2016-04-06 | 上海吉亿电机有限公司 | Rotary transformer |
| CN106357172A (en) * | 2016-08-29 | 2017-01-25 | 西安秦川数控系统工程有限公司 | Sine-cosine signal processing circuit for speed and positon feedback |
| CN107659224A (en) * | 2017-08-18 | 2018-02-02 | 天津大学 | The device and method of rotary transformer axes-angle conversion based on square wave excitation signal |
| CN109639191A (en) * | 2018-12-29 | 2019-04-16 | 南京奥吉智能汽车技术研究院有限公司 | Motor position detection method and motor control 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 |
| CN110429876A (en) * | 2019-08-29 | 2019-11-08 | 重庆长安新能源汽车科技有限公司 | A kind of motor rotor position detection method, device, system and electric car |
| CN111025190A (en) * | 2019-11-28 | 2020-04-17 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN112444272A (en) * | 2019-08-29 | 2021-03-05 | 广州汽车集团股份有限公司 | Resolver excitation drive device, motor rotor position analysis device and automobile steering system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965462A (en) * | 2015-06-30 | 2015-10-07 | 奇瑞汽车股份有限公司 | Sensing detection system |
| CN105180974A (en) * | 2015-08-31 | 2015-12-23 | 奇瑞汽车股份有限公司 | Rotary transformer decoding interface circuit |
| CN105137868A (en) * | 2015-09-17 | 2015-12-09 | 成都思邦力克科技有限公司 | Signal simulator |
| CN105203020A (en) * | 2015-09-23 | 2015-12-30 | 河北汉光重工有限责任公司 | Rotary transformer demodulation device for excitation synchronization |
| CN105222814A (en) * | 2015-11-04 | 2016-01-06 | 上海无线电设备研究所 | Multi-turn memory rotary transformer decoding circuit and position calculation method thereof |
| CN105469966A (en) * | 2016-01-12 | 2016-04-06 | 上海吉亿电机有限公司 | Rotary transformer |
| CN106357172A (en) * | 2016-08-29 | 2017-01-25 | 西安秦川数控系统工程有限公司 | Sine-cosine signal processing circuit for speed and positon feedback |
| CN107659224A (en) * | 2017-08-18 | 2018-02-02 | 天津大学 | The device and method of rotary transformer axes-angle conversion based on square wave excitation signal |
| CN107659224B (en) * | 2017-08-18 | 2020-03-06 | 天津大学 | Device and method for converting axial angle of rotary transformer based on square wave excitation signal |
| CN109639191A (en) * | 2018-12-29 | 2019-04-16 | 南京奥吉智能汽车技术研究院有限公司 | Motor position detection method and motor control 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 |
| CN110429876A (en) * | 2019-08-29 | 2019-11-08 | 重庆长安新能源汽车科技有限公司 | A kind of motor rotor position detection method, device, system and electric car |
| CN112444272A (en) * | 2019-08-29 | 2021-03-05 | 广州汽车集团股份有限公司 | Resolver excitation drive device, motor rotor position analysis device and automobile steering system |
| CN111025190A (en) * | 2019-11-28 | 2020-04-17 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
| CN111025190B (en) * | 2019-11-28 | 2021-11-09 | 中国航空工业集团公司西安航空计算技术研究所 | Rotary transformer signal conditioning circuit and method |
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