CN207573266U - For the detecting system of permanent-magnet synchronous motor rotor position - Google Patents
For the detecting system of permanent-magnet synchronous motor rotor position Download PDFInfo
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- CN207573266U CN207573266U CN201721469530.6U CN201721469530U CN207573266U CN 207573266 U CN207573266 U CN 207573266U CN 201721469530 U CN201721469530 U CN 201721469530U CN 207573266 U CN207573266 U CN 207573266U
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- synchronous motor
- magnet synchronous
- rotor
- permanent
- microcontroller
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Abstract
The utility model discloses a kind of detecting systems for permanent-magnet synchronous motor rotor position, microcontroller is run by driver control permanent magnet synchronous motor in this system, rotary transformer and giant magnetoresistance position sensor are set in permanent magnet synchronous motor and detect rotor-position signal respectively, the parallel port input terminal of the decoded circuit input microcontroller of output signal of rotary transformer, input terminal of the giant magnetoresistance position sensor output signal through traffic filter input difference operational amplifier circuit, the A/D input terminals of the output terminal connection microcontroller of difference operational amplifying circuit, first power supply provides the working power of decoding circuit, second source provides the giant magnetoresistance position sensor, the working power of traffic filter and difference operational amplifying circuit.This system uses two kinds of mutually independent position-detection sensors and corresponding processing circuit, while acquires rotor-position signal, improves the diagnosis coverage rate of rotor-position acquisition signal, improves the correctness and reliability of permanent magnet synchronous motor output torque.
Description
Technical field
The utility model is related to a kind of detecting systems for permanent-magnet synchronous motor rotor position.
Background technology
Generally use permanent-magnet synchronous motor rotor position is as a weight in motor control algorithms in new-energy automobile
Parameter is wanted, directly affects the output torque of motor, and motor output torque is the important sources of new-energy automobile power, therefore
The reliability of permanent-magnet synchronous motor rotor position detection directly affects the power performance of new-energy automobile.
Usual permanent magnet synchronous motor is realized by microcontroller by driver to be controlled, the inspection of permanent-magnet synchronous motor rotor position
It surveys mostly using single rotary transformer, microcontroller acquires the output signal of rotary transformer by special decoding chip,
Realize the detection of rotor-position.In this scenario the accuracy of detection of rotor-position installed by rotary transformer, rotary transformer
The factors such as the reliability, the reliability of special decoding chip that are connect with microcontroller harness influence, therefore rotor-position is examined
The accuracy and reliability of survey are difficult to ensure that.
Invention content
The technical problem to be solved by the utility model is to provide a kind of detections for permanent-magnet synchronous motor rotor position
System, this system uses two kinds of mutually independent position-detection sensors and corresponding processing circuit, while acquires rotor-position
Signal improves the diagnosis coverage rate of rotor-position acquisition signal, improves the correctness of permanent magnet synchronous motor output torque and reliable
Property.
In order to solve the above technical problems, the utility model is used for the detecting system of permanent-magnet synchronous motor rotor position including micro-
Controller, permanent magnet synchronous motor, rotary transformer and decoding circuit, the microcontroller are same by permanent magnetism described in driver control
Motor operation is walked, the rotary transformer is set in the permanent magnet synchronous motor and detects rotor-position signal, and the rotation becomes
Depressor output signal inputs the parallel port input terminal of the microcontroller through the decoding circuit, and this system further includes giant magnetoresistance position
Sensor, traffic filter, difference operational amplifying circuit, the first power supply and second source, the giant magnetoresistance position sensor are set on institute
It states in permanent magnet synchronous motor and detects rotor-position signal, the giant magnetoresistance position sensor output signal is filtered through the signal
Device inputs the input terminal of the difference operational amplifying circuit, and the output terminal of the difference operational amplifying circuit connects the A/D of the microcontroller
Input terminal, first power supply provide the working power of the decoding circuit, and the second source provides the giant magnetoresistance position
The working power of sensor, traffic filter and difference operational amplifying circuit.
Further, the decoding circuit is PGA411 decoding chips.
Further, first power supply and second source are TLF35584 power supply chips, the TLF35584 power supply chips
Export the working power of two-way independence.
Since the detecting system that the utility model is used for permanent-magnet synchronous motor rotor position employs above-mentioned technical proposal, i.e.,
Microcontroller is run by driver control permanent magnet synchronous motor in this system, and rotary transformer and giant magnetoresistance position sensor are set
In detecting in permanent magnet synchronous motor and respectively rotor-position signal, the decoded circuit input microcontroller of output signal of rotary transformer
The parallel port input terminal of device, input terminal of the giant magnetoresistance position sensor output signal through traffic filter input difference operational amplifier circuit,
The A/D input terminals of the output terminal connection microcontroller of difference operational amplifying circuit, the first power supply provide the working power of decoding circuit, the
Two power supplys provide the working power of the giant magnetoresistance position sensor, traffic filter and difference operational amplifying circuit.This system uses
Two kinds of mutually independent position-detection sensors and corresponding processing circuit, while rotor-position signal is acquired, improve rotor position
The diagnosis coverage rate of acquisition signal is put, improves the correctness and reliability of permanent magnet synchronous motor output torque.
Description of the drawings
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is the detecting system block diagram that the utility model is used for permanent-magnet synchronous motor rotor position.
Specific embodiment
Embodiment is as shown in Figure 1, the present invention includes microcontroller for the detecting system of permanent-magnet synchronous motor rotor position
1st, permanent magnet synchronous motor 2, rotary transformer 3, decoding circuit 4, the microcontroller 1 control the permanent magnetism same by driver 5
Step motor 2 is run, and the rotary transformer 3 is set in the permanent magnet synchronous motor 2 and detects rotor-position signal, the rotation
3 output signal of transformer inputs the parallel port input terminal of the microcontroller 1 through the decoding circuit 4, and this system further includes huge magnetic
Hinder position sensor 6, traffic filter 7, difference operational amplifying circuit 8, the first power supply 91 and second source 92, the giant magnetoresistance position
Sensor 6 is set in the permanent magnet synchronous motor 2 and detects rotor-position signal, the output of giant magnetoresistance position sensor 6 letter
The input terminal of the difference operational amplifying circuit 8 number is inputted through the traffic filter 7, the output terminal of the difference operational amplifying circuit 8 connects
Connecing the A/D input terminals of the microcontroller 1, first power supply 91 provides the working power of the decoding circuit 4, and described second
Power supply 92 provides the working power of the giant magnetoresistance position sensor 6, traffic filter 7 and difference operational amplifying circuit 8.
Preferably, the decoding circuit 4 is PGA411 decoding chips.
Preferably, first power supply 91 and second source 92 are TLF35584 power supply chips 9, the TLF35584 power supplys
Chip 9 exports the working power of two-way independence.
Output signal of rotary transformer carries out the conditioning parsing of rotor-position signal, parsing using decoding circuit in this system
Rotor-position signal afterwards is the parallel port data of 12, and is transferred directly to microcontroller；Giant magneto-resistance sensor output signal is adopted
It is improved with traffic filter and difference operational amplifying circuit, differential signal is converted into the single-ended signal of biasing, it then will simulation
Measure the A/D ports of signal input microcontroller；It is powered simultaneously using two-way independent current source, wherein the first power supply gives decoding electricity
Road power, can realize 2% precision, second source be dedicated sensor power supply interface, can realize 1% precision give huge magnetic
It hinders position sensor, traffic filter and difference operational amplifying circuit and working power is provided；12 parallel ports that microcontroller passes through parallel port
Data obtain the first rotor position digital amount, while the single-ended signal of A/D mouthfuls of acquisitions is tabled look-up, will be by giant magneto-resistance sensor
The rotor-position signal of acquisition is converted into the second rotor-position digital quantity, by comparing handling the first rotor position digital amount and the
Two rotor-position digital quantities, when rotor angle compares absolute difference result less than 1 ° of given threshold, microcontroller normally into
The control of row permanent magnet synchronous motor, the output of permanent magnet synchronous motor torque is in normal condition, and otherwise, microcontroller control permanent magnetism is same
Walking motor output torque reduces or turns off.
Giant magneto-resistance sensor is set to permanent magnet synchronous motor, giant magneto-resistance sensor to be embedded in the mounting means of axis in this system
Installation is simple, and output signal is analog quantity, and carrier-less signal, signal resolution is conveniently.
This system is turned using the different position sensor of two kinds of principles and corresponding processing circuit acquisition permanent magnet synchronous motor
The position signal of son, and rotor-position signal is handled, for obtaining correct, reliable rotor-position signal, to provide
The correct parameter of motor control algorithms, so as to fulfill the correct control of permanent magnet synchronous motor, it is ensured that the dynamic property of new-energy automobile
Energy.
Claims (3)
1. a kind of detecting system for permanent-magnet synchronous motor rotor position becomes including microcontroller, permanent magnet synchronous motor, rotation
Depressor and decoding circuit, the microcontroller are run by permanent magnet synchronous motor described in driver control, the rotary transformer
In the permanent magnet synchronous motor and rotor-position signal is detected, the output signal of rotary transformer is through the decoding circuit
Input the parallel port input terminal of the microcontroller, it is characterised in that：This system further includes giant magnetoresistance position sensor, signal filtering
Device, difference operational amplifying circuit, the first power supply and second source, the giant magnetoresistance position sensor are set in the permanent magnet synchronous motor
And rotor-position signal is detected, the giant magnetoresistance position sensor output signal inputs the difference through the traffic filter and transports
The input terminal on electric discharge road, the output terminal of the difference operational amplifying circuit connect the A/D input terminals of the microcontroller, first electricity
Source provides the working power of the decoding circuit, and the second source provides the giant magnetoresistance position sensor, traffic filter
With the working power of difference operational amplifying circuit.
2. the detecting system according to claim 1 for permanent-magnet synchronous motor rotor position, it is characterised in that：The solution
Code circuit is PGA411 decoding chips.
3. the detecting system according to claim 1 for permanent-magnet synchronous motor rotor position, it is characterised in that：Described
One power supply and second source are TLF35584 power supply chips, the work electricity of the TLF35584 power supply chips output two-way independence
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721469530.6U CN207573266U (en) | 2017-11-07 | 2017-11-07 | For the detecting system of permanent-magnet synchronous motor rotor position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721469530.6U CN207573266U (en) | 2017-11-07 | 2017-11-07 | For the detecting system of permanent-magnet synchronous motor rotor position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207573266U true CN207573266U (en) | 2018-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721469530.6U Active CN207573266U (en) | 2017-11-07 | 2017-11-07 | For the detecting system of permanent-magnet synchronous motor rotor position |
Country Status (1)
| Country | Link |
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| CN (1) | CN207573266U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671275A (en) * | 2020-12-04 | 2021-04-16 | 上海航天控制技术研究所 | High-precision rotary transformer control decoding system and method |
-
2017
- 2017-11-07 CN CN201721469530.6U patent/CN207573266U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112671275A (en) * | 2020-12-04 | 2021-04-16 | 上海航天控制技术研究所 | High-precision rotary transformer control decoding system and method |
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