CN104283469A - Synchronous motor speed regulating system rotor position detection method with adoption of photoelectric pair transistors - Google Patents
Synchronous motor speed regulating system rotor position detection method with adoption of photoelectric pair transistors Download PDFInfo
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- CN104283469A CN104283469A CN201410620587.6A CN201410620587A CN104283469A CN 104283469 A CN104283469 A CN 104283469A CN 201410620587 A CN201410620587 A CN 201410620587A CN 104283469 A CN104283469 A CN 104283469A
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- rotor
- position detection
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 title abstract description 7
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a synchronous motor speed regulating system rotor position detection method with the adoption of photoelectric pair transistors, and relates to the technical field of rotor position detection on synchronous motor speed regulating systems driven by sine wave current. According to the rotor position detection method disclosed by the invention, at least two photoelectric pair transistors are sequentially arranged on the circumference, which is concentric with a rotor, at an equal interval, a speed measuring disc with tooth grooves having the same widths is fixed on a rotary shaft which is concentric with the rotor, and the tooth grooves of the speed measuring disc sequentially shelter the photoelectric pair transistors when the rotor rotates to enable the photoelectric pair transistors to output high electric level; with six positions in which an output signal of arbitrary one photoelectric pair transistor jumps in an electricity period as standard positions, the current position of the rotor theta is as follows: theta=theta<last>+omega t<step>+theta<cf>. Compared with a position detection method with the adoption of a photoelectric encoder or a rotary transformer, the rotor position detection method has the advantage of low cost. Compared with a hardware phase-locked loop (PLL) circuit-based rotor position detection method with the adoption of the photoelectric pair transistors, the rotor position detection method has the advantage of high interference resistance, high reliability, capability of accurately detecting a high-frequency input signal, high accuracy in rotor angular fine division and easiness in driving and controlling a circuit, and low cost.
Description
Technical Field
The invention relates to the technical field of detection of the position of a rotor of a speed regulating system of a synchronous motor driven by sine wave current.
Background
Synchronous motors are divided into electrically excited synchronous motors, permanent magnet synchronous motors and hybrid excited synchronous motors, and particularly rare earth permanent magnet synchronous motors have the advantages of low loss, high efficiency and obvious electricity-saving effect and are widely applied. With the rapid development of electronic technology, control theory and rare earth permanent magnet materials, the application range of the sine wave current driven synchronous motor in the fields of servo, driving and the like is continuously expanded due to the unique precise driving characteristic of the sine wave current driven synchronous motor, the cost of a motor driving system is paid attention by scholars in the related fields, and particularly, the low cost is important in the fields of industry, civil use and the like.
In the existing sine wave synchronous motor driving system, a photoelectric encoder or a rotary transformer is usually adopted for rotor position detection, so that the cost is high, and further popularization and application of the motor in occasions sensitive to price are limited.
Disclosure of Invention
In order to reduce the cost of a speed regulating system of a sine wave synchronous motor, the invention provides a method for detecting the position of a rotor of the speed regulating system of the synchronous motor by adopting photoelectric geminate transistors.
At least two photoelectric pair tubes are sequentially arranged on the circumference concentric with the rotor at equal intervals, a speed measuring disc with the same width as a tooth groove is fixed on a rotating shaft concentric with the rotor, and the tooth groove of the speed measuring disc sequentially shields the photoelectric pair tubes when the rotor rotates, so that the photoelectric pair tubes output high levels; taking 6 positions at which the output signal of any one photoelectric pair tube jumps in one electric cycle as standard positions;
the current position of the rotorθComprises the following steps:θ=θ last +ωt step +θ cf
wherein,θ last is the rotor position at the previous moment;
omega is the current rotor speed;
t step is a time interval;
θ cf to correct the angle.
Compared with the position detection method adopting a photoelectric encoder or a rotary transformer, the method has the advantage of low cost. Compared with a rotor position detection method based on a hardware phase-locked loop (PLL) circuit and adopting photoelectric pair tubes, the method has the following advantages: the method has the advantages that firstly, the anti-interference capability is strong, the reliability is high, and the high-frequency input signal can be accurately detected; secondly, the subdivision precision of the rotor angle is high; and thirdly, the driving control circuit is simple and low in cost.
Drawings
Fig. 1 is a flowchart of a rotor position detection subroutine.
Fig. 2 is a schematic structural view of the rotor position detecting device.
Detailed Description
Taking a rotor antipodal sine wave synchronous motor speed regulating system adopting a current hysteresis control strategy as an example, the system uses TMS320F2812 of TI company as a control chip, and the position detection part of the system roughly has the following structure:
as shown in fig. 2, three photoelectric pair tubes 1 are arranged on a circle concentric with the rotor 4 at a distance of 15 ° in sequence, and a tooth space equal-width speed measuring disk 2 with 8 teeth is fixed on the rotating shaft 3 concentric with the rotor 4. When the rotor rotates, each tooth groove on the speed measuring disk 2 sequentially shields the photoelectric pair tube 1.
When the teeth of the speed measuring disk 2 block the optical path of a certain photoelectric geminate transistor, the photoelectric geminate transistor outputs high level, otherwise, the photoelectric geminate transistor outputs low level. Because the rotor position is uniquely determined when the output signals of the photoelectric pair tubes jump, 6 positions at which the output signal of any one photoelectric pair tube jumps within one electric cycle (360 °/8=45 °) are defined as standard positions.
The controller calculates the rotor position according to the position signal output by the broadcasting and television pair tube at the standard positionθAnd the accurate positioning of the rotor position is realized.
Current position of rotorθComprises the following steps:θ=θ last +ωt step +θ cf
wherein,θ last is the rotor position at the previous moment;
omega is the current rotor speed;
t step to control the time interval;
θ cf to correct the angle.
During detection, the current rotor rotating speed is calculated according to the position signal captured at the standard position and assigned to the current rotor rotating speedω, then according to the rotor position at the previous momentθ last、 Current rotor speed omega, control time intervalt step And correcting the angleθ cf Calculating the current rotor positionθ。
The working flow is shown in figure 1.
Claims (1)
1. The rotor position detection method of the synchronous motor speed regulation system adopting the photoelectric pair tubes comprises the steps that at least two photoelectric pair tubes are sequentially arranged on the circumference concentric with a rotor at equal intervals, a speed measuring disc with the same width as a tooth space is fixed on a rotating shaft concentric with the rotor, and the tooth space of the speed measuring disc sequentially shields the photoelectric pair tubes when the rotor rotates, so that the photoelectric pair tubes output high levels; taking 6 positions at which the output signal of any one photoelectric pair tube jumps in one electric cycle as standard positions;
the current position of the rotorθComprises the following steps:θ=θ last +ωt step +θ cf
wherein,θ last is the rotor position at the previous moment;
omega is the current rotor speed;
t step is a time interval;
θ cf to correct the angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620587.6A CN104283469A (en) | 2014-11-07 | 2014-11-07 | Synchronous motor speed regulating system rotor position detection method with adoption of photoelectric pair transistors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410620587.6A CN104283469A (en) | 2014-11-07 | 2014-11-07 | Synchronous motor speed regulating system rotor position detection method with adoption of photoelectric pair transistors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104283469A true CN104283469A (en) | 2015-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410620587.6A Pending CN104283469A (en) | 2014-11-07 | 2014-11-07 | Synchronous motor speed regulating system rotor position detection method with adoption of photoelectric pair transistors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104283469A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032352A1 (en) * | 2016-08-16 | 2018-02-22 | Robert Bosch Gmbh | An optical sensor and method for estimating positions of rotors in a motor and the motor comprising the optical sensor |
| CN110995108A (en) * | 2019-12-20 | 2020-04-10 | 阳光电源股份有限公司 | Rotary transformer signal compensation method and device and rotary transformer |
| CN113965119A (en) * | 2021-10-09 | 2022-01-21 | 西安交通大学 | System for realizing real-time angle positioning of direct current motor based on FPGA and custom instruction set |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361426A (en) * | 2011-10-28 | 2012-02-22 | 常州华阳电子科技有限公司 | Rotor angle subdivision method for switched reluctance motor speed regulation system |
| EP2439841A2 (en) * | 2010-10-07 | 2012-04-11 | Robert Bosch GmbH | Electric motor with rotor position detection |
| CN105322844A (en) * | 2014-07-23 | 2016-02-10 | 江苏风达为新能源科技有限公司 | Synchronous motor speed adjustment system rotor position detecting device and detecting method |
-
2014
- 2014-11-07 CN CN201410620587.6A patent/CN104283469A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2439841A2 (en) * | 2010-10-07 | 2012-04-11 | Robert Bosch GmbH | Electric motor with rotor position detection |
| CN102361426A (en) * | 2011-10-28 | 2012-02-22 | 常州华阳电子科技有限公司 | Rotor angle subdivision method for switched reluctance motor speed regulation system |
| CN105322844A (en) * | 2014-07-23 | 2016-02-10 | 江苏风达为新能源科技有限公司 | Synchronous motor speed adjustment system rotor position detecting device and detecting method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018032352A1 (en) * | 2016-08-16 | 2018-02-22 | Robert Bosch Gmbh | An optical sensor and method for estimating positions of rotors in a motor and the motor comprising the optical sensor |
| US10644574B2 (en) | 2016-08-16 | 2020-05-05 | Robert Bosch Gmbh | Optical sensor and method for estimating positions of rotors in a motor and the motor comprising the optical sensor |
| CN110995108A (en) * | 2019-12-20 | 2020-04-10 | 阳光电源股份有限公司 | Rotary transformer signal compensation method and device and rotary transformer |
| CN113965119A (en) * | 2021-10-09 | 2022-01-21 | 西安交通大学 | System for realizing real-time angle positioning of direct current motor based on FPGA and custom instruction set |
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Application publication date: 20150114 |