CN101510750B - Device and method for detecting initial position angle of double fed electric machine rotor - Google Patents
Device and method for detecting initial position angle of double fed electric machine rotor Download PDFInfo
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- CN101510750B CN101510750B CN2009100262520A CN200910026252A CN101510750B CN 101510750 B CN101510750 B CN 101510750B CN 2009100262520 A CN2009100262520 A CN 2009100262520A CN 200910026252 A CN200910026252 A CN 200910026252A CN 101510750 B CN101510750 B CN 101510750B
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Abstract
The invention relates to an initial position angle detecting device of a double-feed motor rotor and a method thereof. The device includes voltage detecting circuits that are respectively connected with a stator and a rotor of the doubly-fed machine. The voltage detecting circuits are respectively used for detecting the induced electromotive force which is output by the stator side and the rotor side of the double-feed motor, and converting the induced electromotive force into weak electrical signals. The voltage detecting circuits are respectively connected with zero crossing comparison circuits which convert the detected induced electromotive force output by the stator and the rotor of the voltage detecting circuits into square wave signals; the output ends of the zero crossing comparison circuits are respectively connected with two groups of photoelectric isolation circuits which deliver the square wave signals output by the zero crossing comparison circuits into a main processor circuit that processes data. The device is not only applicable to double-feed motors with small capacity but also to large-capacity fans and double-feed speed adjusting systems of pumps and the like. The structure of the device is simple and reliable, regardless of the connection way of the stator winding and the rotor winding. The device is characterized by the convenient use and easy operation, high test precision and wide application scope.
Description
Technical field
The present invention relates to the detection limit technical field, especially relate to a kind of double feeding motor rotor initial position angle checkout gear and method.
Background technology
Rotor-position signal is the necessary condition of the normal operation of high-performance doubly-fed adjustable speed system accurately and reliably.Existing initial position of rotor detection scheme is mainly used for reference the scheme of synchronous machine initial alignment, in double feedback electric engine rotor three phase windings, feed direct current simultaneously, rotor rotates under the effect of electromagnetic torque, note the value of photoelectric encoder behind the stationary rotor by digital signal processor, and initial position angle is calculated.Though this method is fairly simple, but owing to do not consider the connected mode of rotor winding, if directly use, its precondition is that the connected mode of rotor winding must be consistent, if the connected mode of rotor winding is inconsistent, need also to consider that the proper phase of its connected mode existence is poor, and precision is not high.
Another kind of scheme is the stator side feeding three-phase alternating current at double feedback electric engine, the rotor-side open circuit, by the phase relation of oscilloscope observation rotor induction phase voltage with the corresponding phase voltage waveform of corresponding stator, applying external force slowly rotates until the rotor induction corrugating stator voltage waveform phase corresponding with it rotor to overlap fully, note the output valve of encoder at this moment by digital signal processor, promptly be decided to be the zero position of rotor.This test method realizes that to the doubly-fed adjustable speed system of low capacity it is eaily that initial position of rotor detects; And for jumbo blower fan and pump class governing system, because capacity motor is big, rotor moment of inertia is big, realize very difficulty, and the method that adopts test implements and needs instrument and professional, still needs test after the device that alternates coding, the also difficult control of accuracy of detection; Versatility is poor, only is applicable to the motor of particular types, and motor is required height, needs special instrument, and precision is difficult to control.
Summary of the invention
The objective of the invention is problem, provide a kind of simple in structure, easy to operate, accuracy of detection height, the double feeding motor rotor initial position angle checkout gear and the method for good reliability at the prior art existence.
For achieving the above object, double feeding motor rotor initial position angle checkout gear of the present invention, comprise the voltage detecting circuit that is connected with the stator and rotor of double feedback electric engine respectively, voltage detecting circuit is respectively applied for the induced electromotive force that detects the output of double feedback electric engine stator and rotor side, and transfer induced electromotive force to weak electric signal, voltage detecting circuit is connected respectively to the zero passage comparison circuit, and the zero passage comparison circuit is converted into square-wave signal with the detected stator and rotor induced electromotive force of voltage detecting circuit; The output of zero passage comparison circuit is connected with two groups of photoelectric isolating circuits respectively, and the square-wave signal that photoelectric isolating circuit is connected with the output of zero passage comparison circuit is conveyed into the main processor circuit that treatment circuit carries out data processing; Described main processor circuit comprises dsp processor, the power circuit that is connected with dsp processor respectively, clock circuit, watchdog circuit and jtag interface circuit.
Double feeding motor rotor initial position angle detection method of the present invention: voltage detecting circuit is received double feedback electric engine stator and rotor side respectively, stator side at double feedback electric engine feeds three-phase symmetric voltage, the rotor-side open circuit has the three-phase symmetrical current and flows through in the stator winding, produce synthetic rotation magnetomotive force; The stator and rotor solid axes is oriented in the winding axis place, it spatially is static making the stator and rotor winding, the magnetic flux that air gap rotating magnetic flux density wave passes every phase winding changes in time, cause the every phase magnetic linkage of rotor also in time by sinusoidal variations, produce induced electromotive force, the every emf phase of the stator and rotor 90 ° of electrical degrees of rotor magnetic linkage that lag behind respectively in time, its phase difference is the phase difference α 0 of rotor solid axes; By detecting the phase difference of stator and rotor induced electromotive force, and be converted into square-wave signal, send into dsp processor, calculate initial position angle of rotor through light-coupled isolation by the zero passage comparison circuit.
Beneficial effect: the present invention compared with prior art, and is simple and reliable for structure, need not to consider the type of attachment of rotor winding, easy to use easy to operate, accuracy of detection height, and applied range, be not only applicable to the double feedback electric engine of low capacity, be applicable to jumbo blower fan and pump class doubly-fed adjustable speed system yet.
Description of drawings
Fig. 1 is a circuit principle structure block diagram of the present invention;
Fig. 2 is a voltage detecting circuit schematic diagram of the present invention;
Fig. 3 is a main processor circuit schematic diagram of the present invention.
Among Fig. 1: double feedback electric engine-U1, voltage detecting circuit-U2, U3, zero passage comparison circuit-U4, photoelectric isolating circuit-U5, U6, dsp processor-U7, power circuit-U8, clock circuit-U9, watchdog circuit-U10, jtag interface circuit-U11.
Embodiment
The invention will be further described below in conjunction with the embodiment in the accompanying drawing:
Shown in Figure 1: circuit is mainly by voltage detecting circuit U2, U3, zero passage comparison circuit U4, and photoelectric isolating circuit U5, U6, dsp processor U7, power circuit U8, clock circuit U9, watchdog circuit U10, jtag interface circuit U 11 constitutes.Voltage detecting circuit U2, U3 are connected respectively on the stator and rotor of double feedback electric engine U1, are respectively applied for the induced electromotive force that detects the output of double feedback electric engine U1 stator and rotor side, and transfer induced electromotive force to weak electric signal; Voltage detecting circuit U2 and U3 are connected respectively to zero passage comparison circuit U4, and zero passage comparison circuit U4 is converted into square-wave signal with the detected stator and rotor induced electromotive force of voltage detecting circuit U2, U3; The output of zero passage comparison circuit U4 is connected with two groups of photoelectric isolating circuit U5, U6 respectively, photoelectric isolating circuit U5, U6 connect DSP primary processor U7, the square-wave signal of the output of zero passage comparison circuit U4 is conveyed into dsp processor U7 carries out data processing, also be connected with power circuit U8, clock circuit U9, watchdog circuit U10 and jtag interface circuit U 11 on the dsp processor U7 respectively.
Shown in Figure 2, voltage checking chip U2, what U3 adopted is the LV28-P voltage sensor of LEM company, when double feedback electric engine U1 stator side joint three-phase symmetrical alternating current power supply, during the rotor-side open circuit, fixed, the induced electromotive force UA of rotor-side output, Ua is through resistance R 1, R2 sends into voltage detecting circuit U2 respectively, pin+HT of the LV28-P that U3 uses separately, and carry out voltage tester, it is fixed to detect double feedback electric engine U1 respectively, the induced electromotive force of rotor-side output, and transfer it to weak electric signal, afterwards from by U2, U3 LV28-P pin M output separately, the two paths of signals of output is through resistance R 3, R4 sends into zero passage comparison circuit U4, the i.e. pin 4 of the LM339 type zero passage comparable chip of Cai Yonging, pin 6 carried out zero balancing, and by inside generation square-wave signal, then by the pin two of LM339, pin one output square-wave signal, two path U4A of zero passage comparison circuit U4, the output of U4B is connected with two groups of photoelectric isolating circuit U5 respectively, U6, photoelectric isolating circuit U5, what U6 was used is 6N137 type light-coupled isolation chip, the square wave of the pin two output of the LM339 type zero passage comparable chip of wherein using among the U4 is by the R7 of series connection with it, Q1 and R11 are sent out the pin 3 of the 6N137 type light-coupled isolation chip that uses into photoelectric isolating circuit U5; The pin 3 that R8, Q2 and the R12 of the square wave of the pin one output of the LM339 type zero passage comparable chip that U4 uses by series connection is sent out the 6N137 type light-coupled isolation chip that uses into photoelectric isolating circuit U6.Photoelectric isolating circuit U5, the 6N137 type light-coupled isolation chip that U6 uses all is connected on the pin CAP1 and CAP2 of dsp processor U7 by pin 6, the chip of dsp processor U7 adopts 32 fixed point digital signal process chip TMS320F2812 of TI company, the square-wave signal of the output of zero passage comparison circuit U4 caught enter primary processor U7 and carry out data processing, promptly obtain initial position angle of rotor, by two groups of photoelectric isolating circuit U5, U6 makes the output pin of U4 and the CAP1 of dsp processor U7, carry out electrical isolation between the CAP2 pin, to improve the antijamming capability of circuit.
Shown in Figure 3, the input of dsp processor U7 also is connected with power circuit U8, clock circuit U9, watchdog circuit U10 and jtag interface circuit U 11, wherein power supply chip U8 adopts the TPS767D318 type of TI company, clock U9 adopts the active crystal oscillator of 30MHz, and watchdog chip U10 adopts the MAX708SESA type; Power circuit U8 provides the voltage of 3.3V and 1.8V for DSP primary processor U7, the pin 5,6 of TPS767D318 is equipped with the 5V power supply of switch S 1, and be connected with capacitor C 3, the C4 that filtering is used, pin two 3,24 output two-way voltages, 1.8V link to each other with VDD pin among the TMS320F2812 of U7, for it provides core power, 3.3V links to each other with the VDDIO pin, and I/O is provided power supply; Clock circuit U9 provides external clock reference for the TMS320F2812 of dsp processor U7, pin 4 connects the 3.3V power supply through inductance L 1, be associated with capacitor C 1 between the pin 4,2, pin two ground connection, pin 3 clock signals link to each other with the pin X1/XCLKIN of DSP primary processor U7 through Schmidt trigger SM1; That watchdog circuit U10 uses is power supply of microprocessor monitoring chip MAX708SESA, its pin one, 3 directly connects switch S 2,3,4 ground connection, and output signal is inserted the pin XRS of dsp processor U7 by pin one 0, can realize hand-reset, improve the reliability of controller dsp processor U7; The pin one of jtag interface circuit U 11 is connected with the pin TMS of dsp processor U7, pin two is connected with the pin TRST of dsp processor U7, pin 3 is connected with the pin TDI of dsp processor U7, pin 5 connects the 5V power supply, pin 7 is connected with the pin TDO of dsp processor U7, pin 9,11 are connected with the pin TCLK of dsp processor U7, pin one 3 is connected with the pin EMU0 of dsp processor U7, pin one 4 is connected with the pin EMU1 pin of dsp processor U7, pin 4,8,10,12 ground connection, dsp processor U7 has the jtag boundary scan function, can realize analyzing by jtag interface circuit U 11 breakpoint being set and carrying out hardware real-time debug function.
Detection method of the present invention: voltage detecting circuit U2, U3 are received double feedback electric engine U1 stator and rotor side respectively, stator side at double feedback electric engine U1 feeds three-phase symmetric voltage, and the rotor-side open circuit has the three-phase symmetrical current and flows through in the stator winding, produce synthetic rotation magnetomotive force, i.e. stator magnet kinetic potential.Because rotor open circuit does not have electric current in the rotor winding, therefore act on and have only the stator magnet kinetic potential on the magnetic circuit, be the excitation magnetomotive force.To decide, the rotor space reference axis is oriented in the winding axis place, it is fixed to make, the rotor winding spatially is static, the magnetic flux that air gap rotating magnetic flux density wave passes every phase winding changes in time, it is fixed to cause, the every phase magnetic linkage of rotor is also in time by sinusoidal variations, produce induced electromotive force, fixed, the every emf phase of rotor rotor magnetic linkage 90 electrical degrees that lag behind respectively in time, its phase difference is for fixed, the phase difference α 0 of rotor space reference axis, it is fixed to detect, the rotor induction kinetic potential, and be converted into square-wave signal by zero passage comparison circuit U4, with two groups of photoelectric isolating circuit U5, U6 sends into main processor circuit, capture unit through dsp processor U7 calculates initial position angle of rotor.
Claims (3)
1. double feeding motor rotor initial position checkout gear, it is characterized in that: it comprises respectively and the deciding of double feedback electric engine U1, two voltage detecting circuit U2 that rotor connects, U3, stator side at double feedback electric engine U1 feeds three-phase symmetric voltage, the rotor-side open circuit, two voltage detecting circuit U2, it is fixed that U3 is respectively applied for detection double feedback electric engine U1, the induced electromotive force of rotor-side output, and transfer induced electromotive force to weak electric signal, two voltage detecting circuit U2, U3 is connected respectively to zero passage comparison circuit U4, and zero passage comparison circuit U4 is with voltage detecting circuit U2, U3 is detected fixed, the rotor induction kinetic potential is converted into square-wave signal; The output of zero passage comparison circuit U4 is connected with two groups of photoelectric isolating circuit U5, U6 respectively, and photoelectric isolating circuit U5, U6 send the square-wave signal of zero passage comparison circuit U4 output into the main processor circuit that carries out data processing.
2. double feeding motor rotor initial position angle checkout gear according to claim 1, it is characterized in that described main processor circuit comprises dsp processor U7, the power circuit U8 that is connected with dsp processor U7 respectively, clock circuit U9, watchdog circuit U10 and jtag interface circuit U 11.
One kind according to claim 1 the device the double feeding motor rotor initial position angle detection method, it is characterized in that: voltage detecting circuit U2, U3 are received double feedback electric engine U1 stator and rotor side respectively, stator side at double feedback electric engine U1 feeds three-phase symmetric voltage, the rotor-side open circuit, detect the stator and rotor induced electromotive force, and be converted into square-wave signal by zero passage comparison circuit U4, two groups of photoelectric isolating circuit U5, U6 are sent into main processor circuit, capture unit through dsp processor U7 calculates initial position angle of rotor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100262520A CN101510750B (en) | 2009-03-18 | 2009-03-18 | Device and method for detecting initial position angle of double fed electric machine rotor |
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| CN2009100262520A CN101510750B (en) | 2009-03-18 | 2009-03-18 | Device and method for detecting initial position angle of double fed electric machine rotor |
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| CN101510750A CN101510750A (en) | 2009-08-19 |
| CN101510750B true CN101510750B (en) | 2010-09-15 |
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| CN102148603B (en) * | 2011-05-03 | 2013-06-12 | 徐州中矿大传动与自动化有限公司 | Distinguishing method of initial position zero variation of doubly-fed generator rotor and control device thereof |
| CN103234276A (en) * | 2013-04-29 | 2013-08-07 | 王金波 | Control device of domestic intelligent electric control fan heater |
| CN105556828B (en) * | 2013-09-20 | 2017-07-21 | 日立汽车***株式会社 | The drive device of 3 phase brushless motors |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239251A (en) * | 1989-06-30 | 1993-08-24 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Brushless doubly-fed motor control system |
| US20050184698A1 (en) * | 2004-02-20 | 2005-08-25 | Anghel Cristian E. | Position sensing method and apparatus for synchronous motor generator system |
| CN201398165Y (en) * | 2009-03-18 | 2010-02-03 | 中国矿业大学 | Double-fed machine rotor initial position angle detector |
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2009
- 2009-03-18 CN CN2009100262520A patent/CN101510750B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5239251A (en) * | 1989-06-30 | 1993-08-24 | The State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University | Brushless doubly-fed motor control system |
| US20050184698A1 (en) * | 2004-02-20 | 2005-08-25 | Anghel Cristian E. | Position sensing method and apparatus for synchronous motor generator system |
| CN201398165Y (en) * | 2009-03-18 | 2010-02-03 | 中国矿业大学 | Double-fed machine rotor initial position angle detector |
Non-Patent Citations (1)
| Title |
|---|
| 丰胜成.试验法双馈电机转子初始位置角检测方法综述.煤.2008, * |
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