CN203734576U - Highly-reliable rotor position detecting circuit of permanent magnet brushless motor - Google Patents
Highly-reliable rotor position detecting circuit of permanent magnet brushless motor Download PDFInfo
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- CN203734576U CN203734576U CN201420039006.5U CN201420039006U CN203734576U CN 203734576 U CN203734576 U CN 203734576U CN 201420039006 U CN201420039006 U CN 201420039006U CN 203734576 U CN203734576 U CN 203734576U
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000004088 simulation Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000001143 conditioned effect Effects 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 230000036581 peripheral resistance Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
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Abstract
The utility model provides a highly-reliable rotor position detecting circuit of a permanent magnet brushless motor. The highly-reliable rotor position detecting circuit comprises a motor, a control circuit, a rotating transformer, a signal conditioning circuit, a rotary transformer signal processing circuit and a signal output circuit. In the utility model, input and output of the rotary transformer undergo the special signal processing; the good electromagnetism compatibility design is carried out in the PCB layout and wiring, so that the problems of the rotor position detection and signal anti-interference in the large power electromechanical servo system are solved; and the reliability of the rotor position detection circuit in the harsh environment is effectively improved.
Description
Technical field
The utility model relates to high-power mechanical-electrical servo system technical field, is specifically related to the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless.
Background technology
High power levels electromechanical servo system uses permanent magnetic brushless, and the control of motor is adopted to the vector control method based on rotor field-oriented.In this servo system, the position of Obtaining Accurate rotor field vector is crucial.The high request (at a high speed, high accuracy, high stability) of considering space flight servomechanism, high-power mechanical-electrical servo system has adopted the scheme that is made up of absolute coding type rotor-position sensor highly reliable resolver.Because resolver is arranged on rotor to obtain position signalling, its output voltage grade is volt level, be vulnerable to the interference of the electric moter voltage of hectovolt level, and rotor position detection circuit from drive circuit close to, input, output signal line are vulnerable to the interference of high-speed switching devices, and therefore rotor position detection circuit electromagnetic environment is poor.Adopt at present AU6802 chip as excited signal generator and signal processor, adopt single-end circuit to carry out excited signal power amplification; In motor driver debugging, find to occur the unsettled problem of position signalling in resolver position detecting circuit.By analysis, the electromagnetic environment that rotor-position detects is poor, cause the excited signal of resolver and AU6802 chip just, cosine input signal amplitude and frequency be all interfered, cause output signal unstable, cannot meet the requirement of accurate detection position signal, directly affect control performance, cannot meet the demands.
Summary of the invention
The purpose of this utility model is to overcome the defect of prior art, provides a kind of and can be applied to poor electromagnetic environment, has good Electro Magnetic Compatibility, can meet the permanent magnetic brushless highly reliable rotor position detection circuit of high-power electric servo system for the high reliability request of rotor-position detection.
To achieve these goals, the technical solution of the utility model is that the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless, comprises motor and control circuit, resolver, signal conditioning circuit, revolves varying signal treatment circuit and signal output apparatus, wherein, the detected object that the motor rotor position in motor and control circuit is rotor position detection circuit, the control circuit in motor and control circuit receives the bus signals in signal output apparatus, motor rotor position information simulation signal is passed through 4 groups of holding wire input signal conditioning circuit by resolver, signal conditioning circuit comprises revolving and becomes excited signal modulate circuit, revolve relict string signal modulate circuit and revolve and become sinusoidal signal modulate circuit, 4 groups of motor rotor position information simulation signals that resolver imports into are divided into two groups and access respectively to revolve relict string signal modulate circuit and revolve and become sinusoidal signal modulate circuit, the size of current of revolving relict string signal modulate circuit and revolve on the transmission line that becomes the motor rotor position information simulation signal of sinusoidal signal conditioning electricity to input is adjusted, to the conditioning that gains of motor rotor position information simulation signal, motor rotor position information simulation signal input after gain conditioning regulates is revolved in varying signal treatment circuit, revolve varying signal treatment circuit and comprise excited signal circuit for generating and rotor-position signal testing circuit, rotor-position signal testing circuit is input in signal output apparatus after motor rotor position information simulation signal is converted to motor rotor position message digit signal after decoding, revolve varying signal treatment circuit and produce 2 groups of excited signals, after revolving of signal conditioning circuit becomes the processing of excited signal modulate circuit, access resolver, signal output apparatus is converted to parallel bus output mode after spi bus output mode, and data are carried to the control circuit in motor and control circuit.
Further, described resolver adopts the brushless resolver TS2620N21E11 of Duo Mo river company, and excited signal is 7V, and magnet excitation frequency is 10kHz.
Further, the excited signal modulate circuit of described signal conditioning circuit is made up of amplifier OP279 gain conditioned circuit and class AB push-pull power amplification circuit; Revolving relict string signal modulate circuit and revolving change sinusoidal signal modulate circuit is all the gain conditioned circuit being made up of instrument amplifier AD620 and peripheral resistance thereof.
Further, the excited signal circuit for generating that revolves varying signal treatment circuit described in uses chip AD2S99, rotor-position signal testing circuit use AD2S83 decoding chip.
Further, the translation circuit in described signal output apparatus uses chip DM74165.
Further, described in revolve the excited signal circuit for generating chips AD2S99 of varying signal treatment circuit excited signal be 7V, magnet excitation frequency is 10kHz, in rotor-position signal testing circuit, the resolution of AD2S83 decoding chip is selected 12.
The utility model has all done special signal processing to the input and output of resolver, aspect the place and route of PCB, carry out good EMC Design, accurately detect and signal anti-interference problem thereby solved high-power mechanical-electrical servo system motor rotor position, effectively improved the reliability of adverse circumstances lower rotor part position detecting circuit.
Brief description of the drawings
Fig. 1 is the schematic diagram of the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless.
Fig. 2 is revolving relict string signal modulate circuit or and revolving the circuit diagram of relict string signal modulate circuit in signal conditioning circuit.
In figure, 1-motor and control circuit, 2-resolver, 3-signal conditioning circuit, 4-revolves varying signal treatment circuit, 5-signal output apparatus.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
The highly reliable rotor position detection circuit of a kind of permanent magnetic brushless, its principle as shown in Figure 1, comprises motor and control circuit 1, resolver 2, signal conditioning circuit 3, revolves varying signal treatment circuit 4 and signal output apparatus 5.Wherein, the detected object that the motor rotor position in motor and control circuit 1 is rotor position detection circuit, the control circuit in motor and control circuit 1 receives the bus signals in signal output apparatus 5, resolver 2 adopts the brushless resolver TS2620N21E11 of Duo Mo river company, and excited signal is 7V, and magnet excitation frequency is 10kHz, and motor rotor position information simulation signal is passed through 4 groups of holding wire input signal conditioning circuit 3 by resolver 2, signal conditioning circuit 3 comprises revolving and becomes excited signal modulate circuit, revolves relict string signal modulate circuit and revolve and become sinusoidal signal modulate circuit, revolves to become excited signal modulate circuit and be made up of amplifier OP279 gain conditioned circuit and class AB push-pull power amplification circuit, 4 groups of motor rotor position information simulation signals that resolver 2 imports into are divided into two groups and access respectively to revolve relict string signal modulate circuit and revolve and become sinusoidal signal modulate circuit, the size of current of revolving relict string signal modulate circuit and revolve on the transmission line that becomes the motor rotor position information simulation signal of sinusoidal signal conditioning electricity to input is adjusted, thereby improve the antijamming capability of transmission line, then to the conditioning that gains of motor rotor position information simulation signal, guarantee that signal exports in effective range, then the motor rotor position information simulation signal input after gain conditioning regulates is revolved in varying signal treatment circuit 4 again, revolve varying signal treatment circuit 4 and comprise excited signal circuit for generating and rotor-position signal testing circuit, excited signal circuit for generating uses chip AD2S99 to provide excited signal for resolver, and excited signal is 7V, and magnet excitation frequency is 10kHz, in order to ensure the excited signal of AD2S99 generation and the impedance matching of resolver TS262N21E11, through test examination, select OP279 and class AB push-pull power amplification circuit to combine to improve driving force, rotor-position signal testing circuit uses AD2S83 decoding chip, and because motor speed is had relatively high expectations, maximum speed approaches 10000r/min, and the resolution of AD2S83 is selected 12, and now the maximum tracking velocity of chip is 15600r/min, rotor-position signal testing circuit is input in signal output apparatus 5 after motor rotor position information simulation signal is converted to motor rotor position message digit signal after decoding, revolve varying signal treatment circuit 4 and produce 2 groups of excited signals, after revolving of signal conditioning circuit 3 becomes the processing of excited signal modulate circuit, access resolver 2, signal output apparatus 5 is converted to parallel bus output mode after spi bus output mode, and data are carried to the control circuit in motor and control circuit 1.In order to improve the reliability of positional information transmission, rotor-position signal adopts SPI Serial Communication Mode to be transferred in DSP; Design safe and reliable SPI serial communication interface, ensured the transmitting of rotor-position signal, solved the problem that electromagnetic environment is poor, position detection signal is subject to larger interference that resolver 2 is worked.The data of AD2S83 output are the parallel data of 12, in order to realize and the SPI communication of DSP, two DM74165 can be carried out to cascade the task of being converted into serial data output to realize 12 parallel-by-bit data.
Revolve relict string signal modulate circuit and revolve become sinusoidal signal modulate circuit circuit diagram as shown in Figure 2, be all the gain conditioned circuit being formed by instrument amplifier AD620 and peripheral resistance thereof.For the particularity of position detecting circuit environment of living in, on the place and route of PCB, fully carry out EMC Design, respectively interference source and sensitive circuit are carried out to special subregion processing, effectively suppress conducted interference.For strengthen resolver just, the antijamming capability of cosine signal, SIG+ arrives SIG-successively after R1, R2, R3, and after the adjusting of adjusting resistance R1, R2 and R3, electric current is enhanced, current boost in loop is to more than milliampere level, and signal transmission capabilities is improved; The parallel connection of R3 two ends capacitor C 1, strobe; The voltage signal at R3 two ends enters in instrument amplifier U1 after filtering, instrument amplifier U1 adopts instrument amplifier AD620, signal is amplified, obtain one group of signal after gain conditioning, the pin 5,6 of instrument amplifier AD620 connects the AD2S83 decoding chip revolving in varying signal treatment circuit 4 and decodes.
The above-mentioned highly reliable rotor position detection circuit of a kind of permanent magnetic brushless, crosses parameter setting, resolution (10,12,14 and 16) that can free selective decompression; By the selection of peripheral capacitance resistance ware, can change the dynamic property of conversion, as bandwidth, maximum following rate etc.; Utilize signal conditioning circuit, Reliable guarantee the transmission quality of signal, thereby the closed loop that realizes position and speed accurately control, improved the service behaviour of controlling driver.Its technological achievement has been applied in 3.5kW electromechanical servo system research and development design.
Above by reference to the accompanying drawings to embodiment of the present utility model to being explained in detail, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skill in the art, can also under the prerequisite that does not depart from the utility model aim, make various variations.
Claims (6)
1. the highly reliable rotor position detection circuit of permanent magnetic brushless, is characterized in that comprising motor and control circuit (1), resolver (2), signal conditioning circuit (3), revolves varying signal treatment circuit (4) and signal output apparatus (5), wherein, the detected object that the motor rotor position in motor and control circuit (1) is rotor position detection circuit, the control circuit in motor and control circuit (1) receives the bus signals in signal output apparatus (5), motor rotor position information simulation signal is passed through 4 groups of holding wire input signal conditioning circuit (3) by resolver (2), signal conditioning circuit (3) comprises revolving and becomes excited signal modulate circuit, revolve relict string signal modulate circuit and revolve and become sinusoidal signal modulate circuit, 4 groups of motor rotor position information simulation signals that resolver (2) imports into are divided into two groups and access respectively revolving relict string signal modulate circuit and revolving change sinusoidal signal modulate circuit of signal conditioning circuit (3), the size of current of revolving relict string signal modulate circuit and revolve on the transmission line that becomes the motor rotor position information simulation signal of sinusoidal signal conditioning electricity to input is adjusted, to the conditioning that gains of motor rotor position information simulation signal, motor rotor position information simulation signal input after gain conditioning regulates is revolved in varying signal treatment circuit (4), revolve varying signal treatment circuit (4) and comprise excited signal circuit for generating and rotor-position signal testing circuit, rotor-position signal testing circuit is input in signal output apparatus (5) after motor rotor position information simulation signal is converted to motor rotor position message digit signal after decoding, revolve varying signal treatment circuit (4) and produce 2 groups of excited signals, after revolving of signal conditioning circuit (3) becomes the processing of excited signal modulate circuit, access resolver (2), signal output apparatus (5) is converted to parallel bus output mode after spi bus output mode, and data are carried to the control circuit in motor and control circuit (1).
2. the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless as claimed in claim 1, it is characterized in that described resolver (2) adopts the brushless resolver TS2620N21E11 of Duo Mo river company, excited signal is 7V, and magnet excitation frequency is 10kHz.
3. the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless as claimed in claim 1, is characterized in that the excited signal modulate circuit of described signal conditioning circuit (3) is made up of amplifier OP279 gain conditioned circuit and class AB push-pull power amplification circuit; Revolving relict string signal modulate circuit and revolving change sinusoidal signal modulate circuit is all the gain conditioned circuit being made up of instrument amplifier AD620 and peripheral resistance thereof.
4. the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless as claimed in claim 1, the excited signal circuit for generating that revolves varying signal treatment circuit (4) described in it is characterized in that uses chip AD2S99, and rotor-position signal testing circuit uses AD2S83 decoding chip.
5. the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless as claimed in claim 1, is characterized in that the translation circuit in described signal output apparatus (5) uses chip DM74165.
6. the highly reliable rotor position detection circuit of a kind of permanent magnetic brushless as claimed in claim 4, the excited signal that revolves the excited signal circuit for generating chips AD2S99 of varying signal treatment circuit (4) described in it is characterized in that is 7V, magnet excitation frequency is 10kHz, and in rotor-position signal testing circuit, the resolution of AD2S83 decoding chip is selected 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039006.5U CN203734576U (en) | 2014-01-21 | 2014-01-21 | Highly-reliable rotor position detecting circuit of permanent magnet brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420039006.5U CN203734576U (en) | 2014-01-21 | 2014-01-21 | Highly-reliable rotor position detecting circuit of permanent magnet brushless motor |
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| Publication Number | Publication Date |
|---|---|
| CN203734576U true CN203734576U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420039006.5U Expired - Lifetime CN203734576U (en) | 2014-01-21 | 2014-01-21 | Highly-reliable rotor position detecting circuit of permanent magnet brushless motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617829A (en) * | 2015-02-27 | 2015-05-13 | 北京精密机电控制设备研究所 | Position control device and position control method of electromechanical servo system |
| CN108106531A (en) * | 2018-01-16 | 2018-06-01 | 上海崇林汽车电子有限公司 | It is a kind of to revolve the excitation for becoming sensor and rotation varying signal amplifier circuit device |
-
2014
- 2014-01-21 CN CN201420039006.5U patent/CN203734576U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617829A (en) * | 2015-02-27 | 2015-05-13 | 北京精密机电控制设备研究所 | Position control device and position control method of electromechanical servo system |
| CN108106531A (en) * | 2018-01-16 | 2018-06-01 | 上海崇林汽车电子有限公司 | It is a kind of to revolve the excitation for becoming sensor and rotation varying signal amplifier circuit device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |