CN209296011U - A kind of rotary transformer interface arrangement and frequency converter - Google Patents
A kind of rotary transformer interface arrangement and frequency converter Download PDFInfo
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- CN209296011U CN209296011U CN201920172054.4U CN201920172054U CN209296011U CN 209296011 U CN209296011 U CN 209296011U CN 201920172054 U CN201920172054 U CN 201920172054U CN 209296011 U CN209296011 U CN 209296011U
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Abstract
A kind of rotary transformer interface arrangement and frequency converter, including MCU module, excitation conditioning module and feedback filtering conditioning module, MCU module generates the pulse width modulating signal and original excitation voltage of default duty ratio according to target cosine and sine signal, conditioning module is motivated to generate target excitation voltage according to pulse width modulating signal and original excitation voltage signal, so that rotary transformer generates original cosine and sine signal according to target excitation voltage, feedback filtering conditioning module generates target cosine and sine signal according to original cosine and sine signal.MCU module can answer the pulse width modulating signal of duty ratio and original excitation voltage that original cosine and sine signal is adjusted according to the amplitude size output phase of target cosine and sine signal, to make target cosine and sine signal in the decoding ranges of MCU module, therefore the rotary transformer for solving traditional scheme for different transformation ratios needs manual change conditioning circuit parameter, dedicated decoding chip can be saved, pcb board is reduced, product cost is also reduced.
Description
Technical field
The utility model belongs to technical field of electromechanical control more particularly to a kind of rotary transformer interface arrangement and frequency conversion
Device.
Background technique
Currently, rotary transformer measurement rotor-position is generallyd use in the products such as frequency converter, servo-driver, in order to
The rotary transformer for adapting to different transformation ratios needs to change the gain of feedback filtering conditioning circuit；However, change gain needs weight
New counting circuit parameter gets material and the soldering appliance replacement using profession, and only professional could complete；This
Outside, the interface circuit of rotary transformer is needed using dedicated decoding chip, such as: the AD2S1200 for the river AU6802N1 or ADI that more rub,
But these special chips are not only at high cost, but also volume is big, and the space of very big pcb board can be occupied in circuit design.
Therefore, there are at high cost and occupancy pcb board space is big for the rotary transformer interface arrangement in traditional technical solution
The problem of.
Utility model content
The utility model provides a kind of rotary transformer interface arrangement and frequency converter, it is intended to solve in traditional technical solution
Rotary transformer interface arrangement there is a problem of it is at high cost and occupy pcb board space it is big.
The utility model is realized in this way a kind of rotary transformer interface arrangement, comprising:
For generating the pulse width modulating signal and original excitation voltage of default duty ratio according to target cosine and sine signal
MCU module；
It is connect with the MCU module and the rotary transformer, for according to the pulse width modulating signal and described
Original excitation voltage signal generates target excitation voltage, so that the rotary transformer generates original according to the target excitation voltage
The excitation conditioning module of beginning cosine and sine signal；And
It is connect with the rotary transformer and the MCU module, for according to the original cosine and sine signal generation
The feedback filtering conditioning module of target cosine and sine signal.
The excitation conditioning module includes: to connect with the MCU module in one of the embodiments, for according to institute
State the filter unit that pulse width modulating signal generates the first DC voltage；It is connect with the MCU module, for according to the original
Beginning excitation voltage generates the first amplifying unit of the first amplification excitation voltage；With the filter unit and first amplifying unit
Connection is put for the voltage magnitude of the first amplification excitation voltage according to first DC voltage regulation with generating second
The excitation voltage amplitude of big excitation voltage adjusts unit；And adjust unit with the excitation voltage amplitude and connect, for according to institute
State the second amplifying unit that the second amplification excitation voltage generates the target excitation voltage.
The original cosine and sine signal includes original sine-signal and original cosine signal in one of the embodiments,
The target cosine and sine signal includes target sinusoidal signal and target cosine signal, the feedback filtering conditioning module include: with
The rotary transformer is connected with the MCU module, for generating the target sinusoidal signal according to the original sine-signal
Sinusoidal signal filter conditioning unit；It is connect with the rotary transformer and the MCU module, for according to described original remaining
String signal generates the cosine signal filtering conditioning unit of the target cosine signal.
First amplifying unit includes: the first operational amplifier, first resistor, second in one of the embodiments,
Resistance and 3rd resistor；The first end of the second resistance be first amplifying unit first input end and with it is described
MCU module connection, the second end of the second resistance are connect with the non-inverting input terminal of first operational amplifier, and described first
With being connected to, the first end of the second end of the first resistor and the 3rd resistor is connected to described first to the first end of resistance altogether
The output end of the inverting input terminal of operational amplifier, the second end of the 3rd resistor and first operational amplifier connects structure altogether
At the output end of first amplifying unit.
In one of the embodiments, the excitation voltage amplitude adjust unit include: the first triode, the 4th resistance,
5th resistance, the 6th resistance and the 7th resistance；The first end of 4th resistance is that the excitation voltage amplitude adjusts unit
First input end, the first end of the 5th resistance is the second input terminal that the excitation voltage amplitude adjusts unit, described
The second end of 5th resistance and the first end of the 6th resistance are connected to the base stage of first triode, the one or three pole altogether
The emitter of pipe is connected with the first end of the 7th resistance, and the second of the second end of the 7th resistance and the 6th resistance
With being connected to altogether, the second end of the collector of first triode and the 4th resistance connects altogether constitutes the excitation voltage width at end
Value adjusts the output end of unit.
Second amplifying unit includes: second operational amplifier, third operation amplifier in one of the embodiments,
Device, the second triode, third transistor, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 8th resistance, the 9th electricity
Resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor and the 14th resistance；The first of the first capacitor
End is the input terminal of second amplifying unit, and the first end of the second end of the first capacitor and the 8th resistance is connected to altogether
The non-inverting input terminal of the second operational amplifier, the second end of the 8th resistance are connected to ground, and the of the 9th resistance
One end is connected to ground, second end, the inverting input terminal of the second operational amplifier and the described tenth of the 9th resistance
The first end of resistance connects altogether, and the second end of the output end of the second operational amplifier and the tenth resistance is connected to described altogether
The non-inverting input terminal of three operational amplifiers, the output end of the third operational amplifier, the first end of the eleventh resistor, institute
The base stage for stating the base stage of the second triode, the first end of the twelfth resistor and the third transistor connects altogether, and described
The collector of the second end of 11 resistance, the first end of second capacitor and second triode connects altogether and accesses first
Power supply, the second end of second capacitor are connected to ground, and the of the emitter of second triode and the thirteenth resistor
One end connection, the current collection of the second end of the twelfth resistor, the first end of the third capacitor and the third transistor
Pole extremely connects altogether, and the second end of the third capacitor is connected to ground, the emitter of the third transistor and the 14th resistance
First end connection, second end, the second end of the thirteenth resistor and the third operation of the 14th resistance put
The inverting input terminal of big device connect altogether and constitute second amplifying unit output end and with the primary side of the rotary transformer around
The first end connection of group, the first end of the 4th capacitor are connect with the second end of the primary side winding of the rotary transformer, institute
The second end for stating the 4th capacitor is connected to ground.
The sinusoidal signal filtering conditioning unit includes: four-operational amplifier, the 5th electricity in one of the embodiments,
Appearance, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance and
19th resistance；The first end of 5th capacitor and the first end of the 15th resistance connect altogether constitutes the sinusoidal signal filter
The first input end of wave conditioning unit is simultaneously connect with the first end of the first vice-side winding of the rotary transformer, the 6th electricity
The first end of appearance and the first end of the 16th resistance connect the second input for constituting the sinusoidal signal filtering conditioning unit altogether
It holds and is connect with the second end of the first vice-side winding of the rotary transformer, the second end and the described 6th of the 5th capacitor
The second end of capacitor is connected to ground, the second end of the 15th resistance, the first end of the 19th resistance and described the altogether
The non-inverting input terminal of four-operational amplifier connects, and the second end of the 19th resistance accesses second source, the 16th electricity
The second end of resistance, the first end of the 17th resistance, the first end of the 7th capacitor and the four-operational amplifier
Inverting input terminal connect altogether, the second end and the described tenth of the output end of the four-operational amplifier, the 7th capacitor
The second end of seven resistance is connected to the first end of the 18th resistance, the second end of the 18th resistance and the 8th electricity altogether
The first end of appearance connects the output end for constituting sinusoidal signal filtering conditioning unit altogether and connect with the MCU module, and described the
The second end of eight capacitors is connected to ground.
The cosine signal filtering conditioning unit includes: the 5th operational amplifier, the 9th electricity in one of the embodiments,
Hold, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 20th resistance, the 21st resistance, the 22nd resistance, the 20th
Three resistance and the 24th resistance；The first end of 9th capacitor and the first end of the 20th resistance connect altogether constitutes institute
It states the first input end of cosine signal filtering conditioning unit and connects with the first end of the second vice-side winding of the rotary transformer
It connects, the first end of the tenth capacitor and the first end of the 23rd resistance connect constitute the cosine signal filtering conditioning altogether
Second input terminal of unit is simultaneously connect with the second end of the second vice-side winding of the rotary transformer, and the of the 9th capacitor
The second end of two ends and the tenth capacitor is connected to ground, the second end of the 23rd resistance, the 24th resistance altogether
First end and the 5th operational amplifier non-inverting input terminal connection, the second end access the of the 24th resistance
Two power supplys, second end, the first end of the 21st resistance, the first end of the 11st capacitor of the 20th resistance
And the inverting input terminal of the 5th operational amplifier connects altogether, the output end of the 5th operational amplifier, the described 11st
The second end of capacitor and the second end of the 21st resistance are connected to the first end of the 22nd resistance altogether, and described
The second end of 22 resistance and the first end of the 12nd capacitor connect altogether constitutes the cosine signal filtering conditioning unit
Output end is simultaneously connect with the MCU module, and the second end of the 12nd capacitor is connected to ground.
In addition, a kind of frequency converter is also provided, including above-mentioned rotary transformer interface arrangement.
Above-mentioned rotary transformer interface arrangement generates default duty ratio according to target cosine and sine signal by MCU module
Pulse width modulating signal and original excitation voltage, make motivate conditioning module according to pulse width modulating signal and original excitation
Voltage signal generates target excitation voltage, so that rotary transformer generates original cosine and sine signal according to target excitation voltage, with
Feedback filtering conditioning module is set to generate target cosine and sine signal according to original cosine and sine signal；The rotary transformer interface arrangement
MCU module can answer the pulse width modulating signal of duty ratio and original according to the amplitude size output phase of target cosine and sine signal
Original cosine and sine signal is adjusted in excitation voltage, to generate target cosine and sine signal, to make target cosine and sine signal in MCU
In the decoding ranges of module, therefore solves traditional scheme and need manual change conditioning electricity for the rotary transformer of different transformation ratios
Road parameter, while eliminating using dedicated decoding chip, the occupied space of pcb board is reduced while reducing product cost.
Detailed description of the invention
Fig. 1 is the module diagram for the rotary transformer interface arrangement that an embodiment of the present invention provides；
Fig. 2 is the module diagram for the rotary transformer interface arrangement that another embodiment of the utility model provides；
Fig. 3 is the circuit diagram for the rotary transformer interface arrangement that an embodiment of the present invention provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the module diagram of the rotary transformer interface arrangement of the utility model preferred embodiment offer, is
Convenient for explanation, only the parts related to this embodiment are shown, details are as follows:
With reference to Fig. 1, a kind of rotary transformer interface arrangement is connect, comprising: MCU with rotary transformer
(Microcontroller Unit, micro-control unit) module 10, excitation conditioning module 20 and feedback filtering conditioning module 30.
Wherein, MCU module 10 is used to generate the pulse width modulating signal of default duty ratio according to target cosine and sine signal
With original excitation voltage；Excitation conditioning module 20 is connect with MCU module 10 and rotary transformer, for being modulated according to pulse width
Signal and original excitation voltage signal generate target excitation voltage, so that rotary transformer is original according to the generation of target excitation voltage
Cosine and sine signal；Feedback filtering conditioning module 30 is connect with rotary transformer and MCU module 10, for being believed according to original sine and cosine
Number generate target cosine and sine signal.In the particular embodiment, MCU module 10 can be exported according to the transformation ratio of rotary transformer
The pulse width modulating signal of default duty ratio, it can answer duty according to the different transformation ratio output phasies of different rotary transformer
The pulse width modulating signal of ratio.The transformation ratio of rotary transformer refers to the ratio of cosine and sine signal and excitation voltage, specifically
For the ratio and cosine signal of sinusoidal signal and excitation voltage and the ratio of excitation voltage, such as: excitation voltage 10V, transformation
Than being 0.5, then sinusoidal signal and cosine signal are 5V.
In the present embodiment, the pulse width tune of default duty ratio is generated according to target cosine and sine signal by MCU module
Signal processed and original excitation voltage make that conditioning module is motivated to be generated according to pulse width modulating signal and original excitation voltage signal
Target excitation voltage, so that rotary transformer generates original cosine and sine signal according to target excitation voltage, so that feedback filtering tune
It manages module and target cosine and sine signal is generated according to original cosine and sine signal；The MCU module of the rotary transformer interface arrangement can
According to the amplitude size output phase of target cosine and sine signal answer duty ratio pulse width modulating signal and original excitation voltage into
Row adjusts original cosine and sine signal, to generate target cosine and sine signal, to make target cosine and sine signal in the decoding of MCU module
In range, therefore the rotary transformer for solving traditional scheme for different transformation ratios needs manual change conditioning circuit parameter, together
When eliminate using dedicated decoding chip, the occupied space of pcb board is reduced while reducing product cost.
Fig. 2 is referred in one of the embodiments, and excitation conditioning module 20 includes: that the amplification of filter unit 201, first is single
Member 203, excitation voltage amplitude adjust unit 202 and the second amplifying unit 204.Wherein, filter unit 201 and MCU module 10
Connection, for generating the first DC voltage according to pulse width modulating signal；First amplifying unit 203 is connect with MCU module 10,
For generating the first amplification excitation voltage according to original excitation voltage；Excitation voltage amplitude adjusts unit 202 and filter unit 201
It is connected with the first amplifying unit 203, for amplifying the voltage magnitude of excitation voltage according to the first DC voltage regulation first, with life
At the second amplification excitation voltage；Second amplifying unit 204 adjusts unit 202 with excitation voltage amplitude and connect, for according to second
Amplify excitation voltage and generates target excitation voltage.In the particular embodiment, MCU module 10 is exported according to target cosine and sine signal
The pulse width modulating signal of corresponding duty ratio, and be filtered by filter unit 201 to export corresponding direct current
Pressure, so that the second amplifying unit 204 be allow to export the mesh for meeting the actual demand of different transformation ratios of different rotary transformer
Mark excitation voltage.
Original cosine and sine signal includes original sine-signal and original cosine signal, target in one of the embodiments,
Cosine and sine signal includes target sinusoidal signal and target cosine signal, and feedback filtering conditioning module 30 includes that sinusoidal signal filtering is adjusted
It manages unit 301 and cosine signal filters conditioning unit 302；Wherein, sinusoidal signal filtering conditioning unit 301 and rotary transformer and
MCU module 10 connects, for generating target sinusoidal signal according to original sine-signal；Cosine signal filter conditioning unit 302 with
Rotary transformer and MCU module 10 connect, for generating target cosine signal according to original cosine signal.In the present embodiment,
By feedback filtering conditioning module 30 according to the corresponding original sine-signal output phase of the different transformation ratios of different rotary transformer
The target cosine signal answered is decoded so that MCU module be enable to receive target cosine and sine signal to obtain rotor
Location information, and original excitation voltage is generated according to location information.The rotation in traditional scheme to different transformation ratios can be substituted
Transformer needs manual change conditioning circuit parameter, while eliminating using dedicated decoding chip, is reducing the same of product cost
When also reduce the occupied space of pcb board.
The first amplifying unit 203 includes: the first operational amplifier A1, first resistor R1, in one of the embodiments,
Two resistance R2 and 3rd resistor R3；Wherein, the first end of second resistance R2 be the first amplifying unit 203 first input end simultaneously
It is connect with MCU module 10, the second end of second resistance R2 is connect with the non-inverting input terminal of the first operational amplifier A1, first resistor
The first end of R1 is connected to ground, and the second end of first resistor R1 and the first end of 3rd resistor R3 are connected to the first operational amplifier altogether
It is single that the output end of the inverting input terminal of A1, the second end of 3rd resistor R3 and the first operational amplifier A1 connect the first amplification of composition altogether
The output end of member 203.
It includes: the first triode Q1, the 4th resistance that excitation voltage amplitude, which adjusts unit 202, in one of the embodiments,
R4, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7；The first end of 4th resistance R4 is that excitation voltage amplitude adjusts list
The first input end of member 202, the first end of the 5th resistance R5 are the second input terminal that excitation voltage amplitude adjusts unit 202, the
The second end of five resistance R5 and the first end of the 6th resistance R6 are connected to the base stage of the first triode Q1, the hair of the first triode Q1 altogether
The connection of the first end of emitter-base bandgap grading and the 7th resistance R7, the second end of the 7th resistance R7 and the second end of the 6th resistance R6 are connected to ground altogether,
The collector of first triode Q1 and the second end of the 4th resistance R4 connect altogether constitutes the output that excitation voltage amplitude adjusts unit 202
End.The first triode Q1 of the present embodiment can be realized by NPN type triode.
The second amplifying unit 204 includes: second operational amplifier A2, third operation amplifier in one of the embodiments,
Device A3, the second triode Q2, third transistor Q3, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4,
Eight resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13 and
14th resistance R14；The first end of first capacitor C1 is the input terminal of the second amplifying unit 204, the second end of first capacitor C1
It is connected to the non-inverting input terminal of second operational amplifier A2, the second end connection of the 8th resistance R8 altogether with the first end of the 8th resistance R8
Yu Di, the first end of the 9th resistance R9 are connected to ground, the anti-phase input of the second end of the 9th resistance R9, second operational amplifier A2
The first end of end and the tenth resistance R10 connect altogether, and the second end of the output end of second operational amplifier A2 and the tenth resistance R10 are total
It is connected to the non-inverting input terminal of third operational amplifier A3, the first of the output end of third operational amplifier A3, eleventh resistor R11
The base stage at end, the base stage of the second triode Q2, the first end of twelfth resistor R12 and third transistor Q3 connects altogether, and the 11st
The collector of the second end of resistance R11, the first end of the second capacitor C2 and the second triode Q2 connects altogether and accesses the first power supply,
The second end of second capacitor C2 is connected to ground, and the emitter of the second triode Q2 is connect with the first end of thirteenth resistor R13, the
Second end, the first end of third capacitor C3 and the collector of third transistor Q3 of 12 resistance R12 extremely connects altogether, third capacitor
The second end of C3 is connected to ground, and the emitter of third transistor Q3 is connect with the first end of the 14th resistance R14, the 14th resistance
The inverting input terminal of the second end of R14, the second end of thirteenth resistor R13 and third operational amplifier A3 connects altogether and constitutes
The output end of two amplifying units 204 is simultaneously connect, the first end of the 4th capacitor C4 with the first end of the primary side winding of rotary transformer
It is connect with the second end of the primary side winding of rotary transformer, the second end of the 4th capacitor C4 is connected to ground.The second of the present embodiment
Triode Q2 can be realized that the third transistor Q3 of the present embodiment can be realized by NPN type triode by PNP type triode.
Sinusoidal signal filtering conditioning unit 301 includes: four-operational amplifier A4, the 5th in one of the embodiments,
Capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 15th resistance R15, the 16th resistance R16, the 17th electricity
Hinder R17, the 18th resistance R18 and the 19th resistance R19；The first of the first end of 5th capacitor C5 and the 15th resistance R15
End connects the first input end for constituting sinusoidal signal filtering conditioning unit 301 and the with the first vice-side winding of rotary transformer altogether
One end connection, the first end of the 6th capacitor C6 and the first end of the 16th resistance R16 connect altogether constitutes sinusoidal signal filtering conditioning list
Second input terminal of member 301 is simultaneously connect, the second end of the 5th capacitor C5 with the second end of the first vice-side winding of rotary transformer
With the second end of the 6th capacitor C6 be connected to altogether ground, the second end of the 15th resistance R15, the first end of the 19th resistance R19 and
The non-inverting input terminal of four-operational amplifier A4 connects, and the second end of the 19th resistance R19 accesses second source, the 16th resistance
The second end of R16, the first end of the 17th resistance R17, the first end of the 7th capacitor C7 and four-operational amplifier A4 it is anti-
Phase input terminal connects altogether, and the of the output end of four-operational amplifier A4, the second end of the 7th capacitor C7 and the 17th resistance R17
Two ends are connected to the first end of the 18th resistance R18 altogether, and the second end of the 18th resistance R18 and the first end of the 8th capacitor C8 connect altogether
It constitutes the output end of sinusoidal signal filtering conditioning unit 301 and is connect with MCU module 10, the second end of the 8th capacitor C8 is connected to
Ground.
Cosine signal filtering conditioning unit 302 includes: the 5th operational amplifier A5, the 9th in one of the embodiments,
Capacitor C9, the tenth capacitor C10, the 11st capacitor C11, the 12nd capacitor C12, the 20th resistance R20, the 21st resistance R21,
22nd resistance R22, the 23rd resistance R23 and the 24th resistance R24；The first end and the 20th of 9th capacitor C9
The first end of resistance R20 connects the first input end for constituting cosine signal filtering conditioning unit 302 and the with rotary transformer altogether
The first end of two vice-side windings connects, and the first end of the tenth capacitor C10 and the first end of the 23rd resistance R23 are connect altogether more than composition
Second input terminal of string signal filtering conditioning unit 302 is simultaneously connect with the second end of the second vice-side winding of rotary transformer, the
The second end of nine capacitor C9 and the second end of the tenth capacitor C10 are connected to ground, the second end of the 23rd resistance R23, the 20th altogether
The first end of four resistance R24 and the non-inverting input terminal connection of the 5th operational amplifier A5, the second end of the 24th resistance R24
Access second source, the second end of the 20th resistance R20, the first end of the 21st resistance R21, the 11st capacitor C11 the
The inverting input terminal of one end and the 5th operational amplifier A5 connect altogether, output end, the 11st capacitor of the 5th operational amplifier A5
The second end of C11 and the second end of the 21st resistance R21 are connected to the first end of the 22nd resistance R22 altogether, and the 22nd
The second end of resistance R22 and the first end of the 12nd capacitor C12 connect the output end for constituting cosine signal filtering conditioning unit 302 altogether
And connect with MCU module 10, the second end of the 12nd capacitor C12 is connected to ground.
In addition, a kind of frequency converter is also provided, including above-mentioned rotary transformer interface arrangement.
Its working principle is illustrated by taking rotary transformer interface arrangement shown in Fig. 3 as an example below, details are as follows:
MCU module 10 generates the pulse width modulating signal REF, i.e. MCU of default duty ratio according to target cosine and sine signal
Module 10 can according to the duty ratio of the different transformation ratio de-regulation pulse width modulating signal REF of rotary transformer, and according to
The target cosine and sine signal of the rotary transformer output of different transformation ratios generates original excitation voltage RSO1, while MCU module 10
Pulse width modulating signal REF is exported to the non-inverting input terminal of the 6th operational amplifier A6, and to the first operational amplifier A1
Non-inverting input terminal export the original excitation voltage RSO1；Make the 6th operational amplifier A6 pulse-width modulated signal REF into
Row voltage shifts can be given after the partial pressure of the 5th resistance R5 with improving the carrying load ability of pulse width modulating signal REF
First triode Q1, which is provided, meets the DC voltage that the transformation ratio of rotary transformer needs, while the first operational amplifier A1 is to original
Beginning excitation voltage RSO1 carries out with phase enhanced processing, to generate the first amplification excitation voltage, and to second operational amplifier A2's
Non-inverting input terminal exports the first amplification excitation voltage, so that second operational amplifier A2 carries out again the first amplification excitation voltage
Secondary same phase enhanced processing to generate the second amplification excitation voltage, and to the homophase input of third operational amplifier A3 to export this
Two amplification excitation voltages buffer third operational amplifier A3 to the second amplification excitation voltage signal, and pass through second
Triode Q2 and third transistor Q3 carries out power amplification to the second amplification excitation voltage, to generate target excitation voltage RSO2,
And it exports to the primary side winding L0 of rotary transformer.
First vice-side winding L1 of rotary transformer exports original sine-signal to sinusoidal signal filtering conditioning unit 301
The second vice-side winding L2 of SIN1, rotary transformer export original cosine signal COS1 to cosine signal filtering conditioning unit 302,
Sinusoidal signal filters conditioning unit 301 and generates target sinusoidal signal SIN2 according to original sine-signal SIN1, and feeds back to MCU mould
Block 10 makes cosine signal filtering conditioning unit 302 generate target cosine signal COS2 according to original cosine signal COS1, and feeds back
To MCU module 10, so that it is decoded MCU module 10 according to target sinusoidal signal SIN2 and target cosine signal COS2, into
And obtain the position signal of rotor.
The utility model has the beneficial effects that
The pulse width modulating signal of default duty ratio is generated according to target cosine and sine signal by MCU module and original is encouraged
Magnetoelectricity pressure makes that conditioning module is motivated to generate target excitation voltage according to pulse width modulating signal and original excitation voltage signal,
So that rotary transformer generates original cosine and sine signal according to target excitation voltage, so that feedback filtering conditioning module is according to original
Cosine and sine signal generates target cosine and sine signal；The MCU module of the rotary transformer interface arrangement can be according to target sine and cosine
It is original just remaining that the amplitude size output phase of signal answers the pulse width modulating signal of duty ratio and original excitation voltage to be adjusted
String signal to make target cosine and sine signal in the decoding ranges of MCU module, therefore is solved with generating target cosine and sine signal
Traditional scheme needs manual change conditioning circuit parameter for the rotary transformer of different transformation ratios, while eliminating using special
With decoding chip, the occupied space of pcb board is reduced while reducing product cost.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of rotary transformer interface arrangement, connect with rotary transformer, which is characterized in that the rotary transformer interface dress
It sets and includes:
For generating the pulse width modulating signal of default duty ratio and the MCU of original excitation voltage according to target cosine and sine signal
Module；
It is connect with the MCU module and the rotary transformer, for according to the pulse width modulating signal and described original
Excitation voltage signal generates target excitation voltage, so that the rotary transformer is original just according to target excitation voltage generation
The excitation conditioning module of cosine signal；And
It is connect with the rotary transformer and the MCU module, for generating the target according to the original cosine and sine signal
The feedback filtering conditioning module of cosine and sine signal.
2. rotary transformer interface arrangement as described in claim 1, which is characterized in that the excitation conditioning module includes:
It is connect with the MCU module, for generating the filter unit of the first DC voltage according to the pulse width modulating signal；
It is connect with the MCU module, for generating the first amplification of the first amplification excitation voltage according to the original excitation voltage
Unit；
It is connect with the filter unit and first amplifying unit, for first according to first DC voltage regulation
Amplify the voltage magnitude of excitation voltage, adjusts unit to generate the excitation voltage amplitude of the second amplification excitation voltage；And
Unit is adjusted with the excitation voltage amplitude to connect, and is encouraged for generating the target according to the second amplification excitation voltage
Second amplifying unit of magnetoelectricity pressure.
3. rotary transformer interface arrangement as described in claim 1, which is characterized in that the original cosine and sine signal includes original
Beginning sinusoidal signal and original cosine signal, the target cosine and sine signal include target sinusoidal signal and target cosine signal, institute
Stating feedback filtering conditioning module includes:
It is connect with the rotary transformer and the MCU module, for generating the target just according to the original sine-signal
The sinusoidal signal of string signal filters conditioning unit；With
It is connect with the rotary transformer and the MCU module, is used to be generated more than the target according to the original cosine signal
The cosine signal of string signal filters conditioning unit.
4. rotary transformer interface arrangement as claimed in claim 2, which is characterized in that first amplifying unit includes:
One operational amplifier, first resistor, second resistance and 3rd resistor；
The first end of the second resistance is the first input end of first amplifying unit and connect with the MCU module, institute
The second end for stating second resistance is connect with the non-inverting input terminal of first operational amplifier, and the first end of the first resistor connects
With being connected to, the first end of the second end of the first resistor and the 3rd resistor is connected to the anti-of first operational amplifier altogether
The output end of phase input terminal, the second end of the 3rd resistor and first operational amplifier connects altogether constitutes first amplification
The output end of unit.
5. rotary transformer interface arrangement as claimed in claim 2, which is characterized in that the excitation voltage amplitude adjusts unit
It include: the first triode, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance；
The first end of 4th resistance is the first input end that the excitation voltage amplitude adjusts unit, the 5th resistance
First end is the second input terminal that the excitation voltage amplitude adjusts unit, the second end of the 5th resistance and the 6th electricity
The first end of resistance is connected to the base stage of first triode altogether, and the of the emitter of first triode and the 7th resistance
One end connection, the second end of the 7th resistance and the second end of the 6th resistance are connected to ground altogether, first triode
The second end of collector and the 4th resistance connects altogether constitutes the output end that the excitation voltage amplitude adjusts unit.
6. rotary transformer interface arrangement as claimed in claim 2, which is characterized in that second amplifying unit includes:
Two operational amplifiers, third operational amplifier, the second triode, third transistor, first capacitor, the second capacitor, third capacitor,
4th capacitor, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor and the tenth
Four resistance；
The first end of the first capacitor is the input terminal of second amplifying unit, the second end of the first capacitor and described
The first end of 8th resistance is connected to the non-inverting input terminal of the second operational amplifier, the second end connection of the 8th resistance altogether
Yu Di, the first end of the 9th resistance are connected to ground, the second end of the 9th resistance, the second operational amplifier it is anti-
The first end of phase input terminal and the tenth resistance connects altogether, the output end of the second operational amplifier and the tenth resistance
Second end be connected to the non-inverting input terminal of the third operational amplifier altogether, it is the output end of the third operational amplifier, described
The first end of eleventh resistor, the base stage of second triode, the first end of the twelfth resistor and the described 3rd 3
The base stage of pole pipe connects altogether, the second end of the eleventh resistor, the first end of second capacitor and second triode
Collector connect and access the first power supply altogether, the second end of second capacitor is connected to ground, the transmitting of second triode
Pole is connect with the first end of the thirteenth resistor, the second end of the twelfth resistor, the first end of the third capacitor with
And the collector of the third transistor extremely connects altogether, the second end of the third capacitor is connected to ground, the third transistor
Emitter is connect with the first end of the 14th resistance, and the of the second end of the 14th resistance, the thirteenth resistor
The inverting input terminal of two ends and the third operational amplifier connect altogether and constitute second amplifying unit output end and with
The first end of the primary side winding of the rotary transformer connects, the first end of the 4th capacitor and the original of the rotary transformer
The second end of side winding connects, and the second end of the 4th capacitor is connected to ground.
7. rotary transformer interface arrangement as claimed in claim 3, which is characterized in that the sinusoidal signal filters conditioning unit
It include: four-operational amplifier, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 15th resistance, the 16th electricity
Resistance, the 17th resistance, the 18th resistance and the 19th resistance；
The first end of 5th capacitor and the first end of the 15th resistance connect altogether constitutes the sinusoidal signal filtering conditioning
The first input end of unit is simultaneously connect with the first end of the first vice-side winding of the rotary transformer, and the of the 6th capacitor
The first end of one end and the 16th resistance connect altogether the second input terminal for constituting sinusoidal signal filtering conditioning unit and with
The second end of first vice-side winding of the rotary transformer connects, the second end of the 5th capacitor and the 6th capacitor
Second end is connected to ground, second end, the first end and the 4th operation of the 19th resistance of the 15th resistance altogether
The non-inverting input terminal of amplifier connects, and the second end of the 19th resistance accesses second source, and the of the 16th resistance
Two ends, the first end of the 17th resistance, the first end of the 7th capacitor and the reverse phase of the four-operational amplifier
Input terminal connects altogether, the output end of the four-operational amplifier, the second end of the 7th capacitor and the 17th resistance
Second end be connected to the first end of the 18th resistance altogether, the of the second end of the 18th resistance and the 8th capacitor
One end connects the output end for constituting the sinusoidal signal filtering conditioning unit altogether and connect with the MCU module, the 8th capacitor
Second end be connected to ground.
8. rotary transformer interface arrangement as claimed in claim 3, which is characterized in that the cosine signal filters conditioning unit
It include: the 5th operational amplifier, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 20th resistance, the 20th
One resistance, the 22nd resistance, the 23rd resistance and the 24th resistance；
The first end of 9th capacitor and the first end of the 20th resistance connect altogether constitutes the cosine signal filtering conditioning
The first input end of unit is simultaneously connect with the first end of the second vice-side winding of the rotary transformer, and the of the tenth capacitor
The first end of one end and the 23rd resistance connects the second input terminal of the composition cosine signal filtering conditioning unit simultaneously altogether
It is connect with the second end of the second vice-side winding of the rotary transformer, the second end of the 9th capacitor and the tenth capacitor
Second end be connected to ground, the second end of the 23rd resistance, the first end of the 24th resistance and described the altogether
The non-inverting input terminal of five operational amplifiers connects, the second end access second source of the 24th resistance, and the described 20th
The second end of resistance, the first end of the 21st resistance, the first end and the 5th operation of the 11st capacitor
The inverting input terminal of amplifier connects altogether, the output end of the 5th operational amplifier, the second end of the 11st capacitor and
The second end of 21st resistance is connected to the first end of the 22nd resistance altogether, and the second of the 22nd resistance
The first end of end and the 12nd capacitor connect altogether constitute the cosine signal filter conditioning unit output end and with the MCU
Module connection, the second end of the 12nd capacitor are connected to ground.
9. a kind of frequency converter, which is characterized in that including the described in any item rotary transformer interface dresses of the claims 1 to 8
It sets.
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| CN201920172054.4U CN209296011U (en) | 2019-01-30 | 2019-01-30 | A kind of rotary transformer interface arrangement and frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504346A (en) * | 2019-01-30 | 2020-08-07 | 厦门蓝海华腾电气有限公司 | Rotary transformer interface device and frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504346A (en) * | 2019-01-30 | 2020-08-07 | 厦门蓝海华腾电气有限公司 | Rotary transformer interface device and frequency converter |
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