CN102288207A - Signal transforming device of rotating transformer - Google Patents
Signal transforming device of rotating transformer Download PDFInfo
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- CN102288207A CN102288207A CN2011102065350A CN201110206535A CN102288207A CN 102288207 A CN102288207 A CN 102288207A CN 2011102065350 A CN2011102065350 A CN 2011102065350A CN 201110206535 A CN201110206535 A CN 201110206535A CN 102288207 A CN102288207 A CN 102288207A
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Abstract
The invention provides a signal conversion device of a rotating transformer, which is characterized by comprising a fixed-amplitude oscillating circuit (1) and at least one signal conversion passage, wherein the signal conversion passage comprises a differential amplifying circuit (3), a multiplier (4) and a low-pass filter circuit (5). The invention has the advantages that the simple and universal circuit structure is adopted, so the reliability is improved; the integration degree of the whole chip is not high, so that an ASIC (Application Specific Integrated Circuit) chip can be manufactured, and the economic property can be greatly improved. In the invention, the accuracy of the signal can be ensured by the design of redundancy, and under the condition that a path of signal is broken, the normal work of the system can be ensured, and the reliability can be further strengthened.
Description
Technical field
The present invention relates to a kind of signals of rotating transformer conversion equipment.
Background technology
Rotary transformer applies to do the measurement of rotor angle position in the motion servo control system.Rotary transformer needs the pumping signal about a 10KHz to drive, output signal for and excitation do the signal of sinusoidal variations with rotor with amplitude frequently.Therefore rotary transformer needs a converter to go to drive and its output signal is converted to angle signal.The converter that has now has two kinds of schemes: series such as the AU6802 in the AD2S1210 of Ya De promise or the river of rubbing are gathered rotary transformer output high-frequency signal with direct AD module with microcontroller and are carried out processing scheme more.Series such as the AU6802 in the AD2S1210 of Ya De promise or the river of rubbing is exported the angle position signal Direct Digital for adopting the closed loop following principle more.This kind scheme need take the microcontroller hardware resource when sampling rotor angle position signal too many, takies 10 I/O mouths and a SPI module at least.This type of chip is too complicated in addition, is equivalent to a microcontroller, needs crystal oscillator, analog-and digital-power supply.And this type of core do not have Redundancy Design, does the traction electric machine rotor angular position on the New-energy electric vehicle and detects the safe reliability deficiency if be used in.This type of chip price is more expensive in addition, and there is cost pressure in the volume production price for industrial products and the automobile electronics of pursuing high economic benefit about 15 dollars.Direct AD module collection rotary transformer output high-frequency signal with microcontroller carries out processing scheme and takies too many microcontroller software resource, inapplicable for the electric machine control system that needs respond fast, this in addition scheme needs very individual devices, is unsafe for being used on the electric automobile on the critical component such as traction electric machine control system.
Summary of the invention
Technical matters to be solved by this invention is to reduce taking of software and hardware resources, reduces the cost pressure of signal converter, and increases it and detect safe reliability being used for doing on the New-energy electric vehicle traction electric machine rotor angular position.
To this, the invention provides a kind of signals of rotating transformer conversion equipment, comprising: fixed ampllitude oscillatory circuit and at least one road conversion of signals passage; Described conversion of signals passage comprises: differential amplifier circuit, multiplier, and low-pass filter circuit; Described fixed ampllitude oscillatory circuit produces the rotary transformer stimulus frequency signal and exports to rotary transformer, the rotary transformer output signal is to described differential amplifier circuit, two input ends of described multiplier receive the output signal of described differential amplifier circuit and fixed ampllitude oscillatory circuit respectively, described multiplier output signal is to low-pass filter circuit, and described low-pass filter circuit output only contains the sine and cosine low frequency signal that rotor changes.
Adopt technique scheme, the fixed ampllitude oscillatory circuit produces the rotary transformer pumping signal, and the rotary transformer output signal is done multiplication through behind the differential amplifier with the rotary transformer pumping signal, becomes the high and low frequency superposed signal from multiplier output signal.This signal filters high-frequency signal through low-pass filter circuit again, becomes only to contain the low frequency cosine and sine signal that rotor angle changes.Utilize this low frequency cosine and sine signal of AD module samples of microcontroller, calculate the rotor angle position then.Above design proposal adopts the simple general-purpose circuit structure, and the entire chip integrated level is not high, can make asic chip, and the cost of volume production is not high, and economy is improved greatly, and reliability increases.
Whole concept of the present invention is converted to the sine and cosine low frequency signal that only contains with the rotor variation with the sophisticated signal that contains high frequency of rotary transformer output simultaneously for adopting simple and practical mode to produce the rotary transformer pumping signal.Compared with prior art, its advantage is, has significantly reduced the hardware resource that takies, and makes cost reduce greatly, and economy is improved greatly.In addition, the signal of output is easy to handle, and this has just reduced it and has taken the software resource of microcontroller, and its processing speed is accelerated.
Preferably, described signals of rotating transformer conversion equipment comprises the described conversion of signals passage of two-way at least.
Preferably, described signals of rotating transformer conversion equipment, the described conversion of signals passage of two-way isomery setting respectively at least.
Wherein, the isomery setting is meant that circuit distribution physically is different.For example, if the two paths of signals ALT-CH alternate channel is arranged, its differential amplifier circuit, multiplier and low-pass filter circuit are in 90 degree in the direction that distributes successively of physics.The advantage of doing like this is because the environment in the automobile is bigger to the interference ratio of electronic circuit, and undesired signal because the difference of circuit distribution physically may only be disturbed one road signal, and does not cause interference or disturbs less another road easily.In addition, even under the situation that one road signal breaks down, still can guarantee system's operate as normal.So its reliability that strengthened greatly.
Further adopt above-mentioned technical characterictic, its advantage is, the motor angle position signalling is very crucial in the motor in electric automobile control system, if adopt two-way signals of rotating transformer ALT-CH alternate channel, can guarantee the accuracy of signal, because the environment in the automobile is bigger to the interference ratio of electronic circuit, under the situation that one road signal breaks down, still can guarantee system's operate as normal, strengthen its reliability greatly.
Preferably, described differential amplifier circuit comprises: positive analog input end, negative analog input end, homophase input resistance, anti-phase input resistance, homophase feedback resistance, anti-phase feedback resistance, reference voltage end, and differential operational amplifier; Described positive analog input end inserts the in-phase end of described differential operational amplifier through described homophase input resistance, described negative analog input end inserts the end of oppisite phase of described differential operational amplifier through described anti-phase input resistance, the in-phase end of described differential operational amplifier is received reference voltage end through the homophase feedback resistance, and the end of oppisite phase of described differential operational amplifier is received the output terminal of described differential operational amplifier through anti-phase feedback resistance.
Preferably, described low-pass filter circuit comprises: first filter resistance, second filter resistance, the 3rd filter resistance, the 4th filter resistance, first filter capacitor, second filter capacitor and operational amplifier, the described first filter resistance end is as the input end of described low-pass filter circuit, its other end inserts the in-phase end of described operational amplifier through described second filter resistance, one end of described first filter capacitor inserts the in-phase end of described operational amplifier through described second filter resistance, its other end is received the output terminal of described operational amplifier, output terminal inserts the end of oppisite phase of described operational amplifier through described the 4th filter resistance, ground connection after the end of oppisite phase of described operational amplifier is connected with described the 3rd filter resistance, described second filter capacitor, one termination is gone into the comparer in-phase end, its other end ground connection.
Description of drawings
Fig. 1 is the alternative enforcement block diagram of signals of rotating transformer conversion equipment of the present invention;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of signals of rotating transformer conversion equipment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, more excellent embodiment of the present invention is described in further detail:
As Fig. 1, a kind of signals of rotating transformer conversion equipment comprises: fixed ampllitude oscillatory circuit 1 and at least one road conversion of signals passage; Described conversion of signals passage comprises: differential amplifier circuit 3, multiplier 4 and low-pass filter circuit 5; Described fixed ampllitude oscillatory circuit 1 produces the rotary transformer stimulus frequency signal and exports to rotary transformer 2, rotary transformer 2 output signals are to described differential amplifier circuit 3, two input ends of described multiplier 4 receive the output signal of described differential amplifier circuit 3 and fixed ampllitude oscillatory circuit 1 respectively, described multiplier 4 output signals are to low-pass filter circuit 5, and described low-pass filter circuit 5 outputs only contain the sine and cosine low frequency signal that rotor changes.
As shown in Figure 2, the specific design scheme is as follows:
One, pumping signal produces
This converter pumping signal
,
The oscillatory circuit of band fixed ampllitude link is adopted in design.Only need to connect the RC circuit, can produce excitation frequency, adjust excitation frequency by the value of adjusting R, C in the converter periphery.The pumping signal that this converter produces is direct driven in rotation transformer after power amplification.
The excitation frequency computing formula:
The excitation output signal formula:
-excitation range signal, unit is volt V;
Two, rotary transformer output signal differential transformation
The rotary transformer output signal is done differential transformation, make it become the positive signal that changes over the ground.
Computing formula is as follows:
Three, multiplying
To do multiplication through signal after the differential converter conversion and pumping signal, by the time by the signal of the sine and cosine low frequency signal that changes with rotor with the high-frequency signal stack that contains pumping signal.This signal promptly becomes after low-pass filtering and only contains the sine and cosine low frequency signal that changes with rotor.
The rotary transformer output signal behind differential transformation is:
……………………………(4)
Multiply each other with formula (2)
………(7)
-multiplier output contain cosine signal, unit is volt V;
Four, low-pass filtering
Multiplier output signal is done low-pass filtering treatment, filter high-frequency signal.
The cutoff frequency of low-pass filter is:
The gain of low-pass filter is:
So low-pass filter output signal, i.e. converter
,
Output signal is:
The gain of-low-pass filter;
Can find out that from formula (10), (11) the converter output signal is for only containing the sine and cosine low frequency signal that changes with rotor.These two signals are sent into microcontroller can be easy to solve the rotor angle position.In following formula
,
,
,
Be gain resistor, when converter output signal peak-to-peak value is 4
In the time, output signal is 0-3V, can directly send into the AD module of microcontroller.
Five, Redundancy Design
Be the application on the Primary Components such as electric automobile traction electric machine control system, the design adopts two-way signals of rotating transformer ALT-CH alternate channel.The motor angle position signalling is very crucial in the motor in electric automobile control system, if adopt Redundancy Design, can guarantee the accuracy of signal, under the situation that one road signal breaks down, still can guarantee system's operate as normal.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a signals of rotating transformer conversion equipment is characterized in that, comprising: fixed ampllitude oscillatory circuit (1) and at least one road conversion of signals passage; Described conversion of signals passage comprises: differential amplifier circuit (3), multiplier (4), and low-pass filter circuit (5); Described fixed ampllitude oscillatory circuit (1) produces the rotary transformer stimulus frequency signal and exports to rotary transformer (2), rotary transformer (2) output signal is to described differential amplifier circuit (3), two input ends of described multiplier (4) receive the output signal of described differential amplifier circuit (3) and fixed ampllitude oscillatory circuit (1) respectively, described multiplier (4) output signal is to low-pass filter circuit (5), and described low-pass filter circuit (5) output only contains the sine and cosine low frequency signal that rotor changes.
2. signals of rotating transformer conversion equipment as claimed in claim 1 is characterized in that, comprising: the described conversion of signals passage of two-way at least.
3. signals of rotating transformer conversion equipment as claimed in claim 2 is characterized in that, the described conversion of signals passage of two-way isomery setting respectively at least.
4. signals of rotating transformer conversion equipment as claimed in claim 1, it is characterized in that, described differential amplifier circuit comprises: positive analog input end, negative analog input end, homophase input resistance, anti-phase input resistance, homophase feedback resistance, anti-phase feedback resistance, reference voltage end, and differential operational amplifier; Described positive analog input end inserts the in-phase end of described differential operational amplifier through described homophase input resistance, described negative analog input end inserts the end of oppisite phase of described differential operational amplifier through described anti-phase input resistance, the in-phase end of described differential operational amplifier is received reference voltage end through the homophase feedback resistance, and the end of oppisite phase of described differential operational amplifier is received the output terminal of described differential operational amplifier through anti-phase feedback resistance.
5. signals of rotating transformer conversion equipment as claimed in claim 1, it is characterized in that, described low-pass filter circuit comprises: first filter resistance, second filter resistance, the 3rd filter resistance, the 4th filter resistance, first filter capacitor, second filter capacitor and operational amplifier, the described first filter resistance end is as the input end of described low-pass filter circuit, its other end inserts the in-phase end of described operational amplifier through described second filter resistance, one end of described first filter capacitor inserts the in-phase end of described operational amplifier through described second filter resistance, its other end is received the output terminal of described operational amplifier, output terminal inserts the end of oppisite phase of described operational amplifier through described the 4th filter resistance, ground connection after the end of oppisite phase of described operational amplifier is connected with described the 3rd filter resistance, described second filter capacitor, one termination is gone into the comparer in-phase end, its other end ground connection.
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| CN2011102065350A CN102288207A (en) | 2011-07-22 | 2011-07-22 | Signal transforming device of rotating transformer |
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| CN2011102065350A CN102288207A (en) | 2011-07-22 | 2011-07-22 | Signal transforming device of rotating transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953557A (en) * | 2017-03-17 | 2017-07-14 | 深圳市大地和电气股份有限公司 | Rotary transformer converter, signals of rotating transformer acquisition system and acquisition method |
| CN107017845A (en) * | 2017-04-10 | 2017-08-04 | 上海龙东光电子有限公司 | Angle demodulating equipment and method for monopole rotary transformer |
| CN109357698A (en) * | 2018-11-01 | 2019-02-19 | 上海开通数控有限公司 | Detection device and method for rotary transformer decoding circuit |
| CN109946540A (en) * | 2019-03-21 | 2019-06-28 | 西安联飞智能装备研究院有限责任公司 | A kind of detection circuit and detection method of sine and cosine resolver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1746392A1 (en) * | 2005-07-19 | 2007-01-24 | Hitachi, Ltd. | Phase detection circuit, resolver/digital converter using the circuit, method performing digital conversion of an analog signal, and control system using the converter |
| CN101135573A (en) * | 2007-10-12 | 2008-03-05 | 北京航空航天大学 | Digital converter of rotary transformer |
| CN101281041A (en) * | 2008-04-14 | 2008-10-08 | 连云港杰瑞电子有限公司 | Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique |
| CN101788307A (en) * | 2010-03-31 | 2010-07-28 | 连云港杰瑞电子有限公司 | Signal-digit converter of low-temperature drift rotary transformer |
-
2011
- 2011-07-22 CN CN2011102065350A patent/CN102288207A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1746392A1 (en) * | 2005-07-19 | 2007-01-24 | Hitachi, Ltd. | Phase detection circuit, resolver/digital converter using the circuit, method performing digital conversion of an analog signal, and control system using the converter |
| CN101135573A (en) * | 2007-10-12 | 2008-03-05 | 北京航空航天大学 | Digital converter of rotary transformer |
| CN101281041A (en) * | 2008-04-14 | 2008-10-08 | 连云港杰瑞电子有限公司 | Single power supply CMOS integrated circuit autosyn / rotary transformer - digital conversion technique |
| CN101788307A (en) * | 2010-03-31 | 2010-07-28 | 连云港杰瑞电子有限公司 | Signal-digit converter of low-temperature drift rotary transformer |
Non-Patent Citations (2)
| Title |
|---|
| 王双红等: "旋转变压器作为位置检测在永磁交流伺服系统中的定位", 《船电技术》, no. 01, 28 February 1994 (1994-02-28), pages 28 - 29 * |
| 魏海涛等: "一种新型的旋转变压器式轴角编码器", 《国外电子测量技术》, no. 04, 20 April 2006 (2006-04-20), pages 57 - 60 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953557A (en) * | 2017-03-17 | 2017-07-14 | 深圳市大地和电气股份有限公司 | Rotary transformer converter, signals of rotating transformer acquisition system and acquisition method |
| CN107017845A (en) * | 2017-04-10 | 2017-08-04 | 上海龙东光电子有限公司 | Angle demodulating equipment and method for monopole rotary transformer |
| CN109357698A (en) * | 2018-11-01 | 2019-02-19 | 上海开通数控有限公司 | Detection device and method for rotary transformer decoding circuit |
| CN109946540A (en) * | 2019-03-21 | 2019-06-28 | 西安联飞智能装备研究院有限责任公司 | A kind of detection circuit and detection method of sine and cosine resolver |
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Application publication date: 20111221 |