CN101726655B - Measuring method and detecting device for winding voltage of switched reluctance motor - Google Patents
Measuring method and detecting device for winding voltage of switched reluctance motor Download PDFInfo
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- CN101726655B CN101726655B CN2009102645700A CN200910264570A CN101726655B CN 101726655 B CN101726655 B CN 101726655B CN 2009102645700 A CN2009102645700 A CN 2009102645700A CN 200910264570 A CN200910264570 A CN 200910264570A CN 101726655 B CN101726655 B CN 101726655B
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Abstract
The invention discloses a measuring method and a detecting device for winding voltage of a switched reluctance motor. The method comprises the following steps of: measuring the virtual value of bus voltage through a proportional partial pressure sampling circuit to obtain the virtual value of the winding voltage when the switched reluctance motor is in a dual-pipe conduction working state and a CCC cut dual-pipe working state, and utilizing a forward and inverse voltage polarity detecting circuit of a winding to detect the direction of the winding voltage after the winding voltage passes through a single-pipe current-storing return circuit. The detecting device consists of a proportional partial pressure sampling circuit sequentially connected in series with the forward and inverse voltage polarity detecting circuit of the winding, a single-chip machine CPU and the single-pipe current-storing return circuit, wherein the proportional partial pressure sampling circuit is sequentially connected in series with the power supply end of the forward and inverse voltage polarity detecting circuit of the winding and then is connected with an external direct-current power supply. The detecting device has the advantages of simple structure and strong practicality.
Description
Technical field
The present invention relates to a kind of measuring method and pick-up unit of winding voltage of switched reluctance motor, solved existing measuring method and cost an arm and a leg and problem of unstable, belong to the field of Electric Machine Control motor windings voltage detecting.
Background technology
Switched reluctance motor (SR motor) is simple in structure firm; Reliable operation, efficient is high, is compared with traditional AC-DC speed-regulating system by its Switch reluctance motor driving system that constitutes (SRD); Have many advantages; As: starting moment is big, and low-speed performance is good, the dash current phenomenon that the influence electricity motivation is occurred when starting; Speed-regulating range width, control flexibly can conveniently realize four quadrant running, has stronger regenerative braking ability, in the rotating speed of broadness and power bracket, all has high-level efficiency, helps saving energy and reduce the cost; Can work in high rotating speed; But phase-deficient operation, fault-tolerant ability is strong etc.At present, the application of SRD in military and civilian industry obtained some effects, but also exists some problems to remain further to be researched and solved, and mainly contains the realization technology of rotor position detection, control method etc.
The speed-adjusting and control system of SR motor needs the size and the direction of winding voltage accurately.The detection of traditional winding voltage all utilizes voltage sensor to realize usually.
At present, most popular voltage is Hall element.And Hall element is processed by semiconductor material, is very sensitive to variation of temperature, and its input resistance, output resistance, product sensitivity also will receive influence of temperature variation, measures great errors thereby give.In addition because the error of zero and the parasitic dc potential error that cause of equipotential electromotive force not; The existence of self-excitation magnetic field zero-bit potential error equal error makes the service precision of Hall element receive very big influence, causes the work of Hall element unreliable; Address these problems and then need design and realize complicated compensating circuit; And Hall element costs an arm and a leg, the reduction that this is all very big the practicality of Hall element, limited the use of Hall element.
Summary of the invention
Technical matters: it is unreliable and cost an arm and a leg the problem that practicality is not high to the objective of the invention is in order to solve work that existing working voltage Hall element carries out running in the voltage measurement.A kind of circuit of method of winding voltage of switched reluctance motor measurement is provided, can have realized the preparation to winding voltage of switched reluctance motor, real-time measurement.Circuit theory and simple in structure, practical is easy to realize.
Technical scheme:
The present invention adopts following technical scheme for realizing above-mentioned purpose:
The measuring method of a kind of winding voltage of switched reluctance motor of the present invention; It is characterized in that: cut under the two-tube duty in two-tube conducting duty and CCC at switched reluctance machines; The effective value that the passing ratio pressure sampling circuit is measured busbar voltage obtains winding voltage effective value size, utilizes the forward and reverse polarity of voltage testing circuit of winding to detect the winding voltage direction after winding voltage is held circuit through single tube.
A kind of pick-up unit of winding voltage of switched reluctance motor; It is characterized in that: this device is connected in series the forward and reverse polarity of voltage testing circuit of winding, singlechip CPU and single tube successively by the ratio pressure sampling circuit and holds circuit and constitute, and wherein the ratio pressure sampling circuit power end that is connected in series the winding voltage polarity detection circuit successively is connected with external dc power respectively.
Beneficial effect: the present invention analyzes through driving circuit and duty to reluctance motor, has proposed a kind of useful feasible scheme of measuring the size and the direction of winding voltage.Utilize the dividing potential drop ratio circuit, and the polarity of voltage test circuit, analog-digital chip ADC and processor controls chip CPU can prepare real-time measurement to the winding voltage of position-sensor-free.The present invention has utilized the existing hardware of switched Reluctance Motor Control System, subsidiary circuit, the size and Orientation that obtains winding voltage that can prepare.Simple in structure, practical.
Description of drawings
Fig. 1 is current return and the optocoupler Continuity signal under the two-tube conducting duty of switched reluctance machines.
Fig. 2 is that switched reluctance machines CCC cuts current return and the optocoupler Continuity signal under the two-tube duty.
Fig. 3 is that the single tube that switched reluctance machines CCC cuts under the two-tube duty holds circuit.
Fig. 4 is the drive system of the switched reluctance machines of position-sensor-free.
Fig. 5 method of the present invention and circuit.
Embodiment
The inventive method comprises the method principle of the size and Orientation that obtains winding voltage:
The present invention describes in conjunction with accompanying drawing, is example with A phase winding voltage, and direction shown in the arrow is the positive dirction of A phase winding voltage:
As shown in Figure 1, as triode T1, during the equal conducting of T2, reluctance motor is in two-tube conducting duty, this moment power supply Udc, triode T1, the A phase inductance, triode T2 constitutes a current return.This moment, the winding voltage UA at A phase inductance two ends was approximately equal to the value of the voltage swing Udc at bus two ends, and direction is for just, and optocoupler 21 conductings this moment are exported a Continuity signal to single-chip microcomputer 3.
As shown in Figure 2, as triode T1, when T2 all turn-offed, reluctance motor was in CCC and cuts two-tube duty, this moment power supply Udc, diode D2, the A phase inductance, diode D1 constitutes a return curcuit.The winding voltage UA at A phase inductance two ends is approximately equal to the value of the voltage swing Udc at bus two ends at this moment, and direction is for negative, and optocoupler 22 conductings this moment are exported a Continuity signal and given single-chip microcomputer 3.
As shown in Figure 3, as triode T1, T2 one of them when turn-offing, reluctance motor is in CCC and cuts the single tube duty, is example with T1, this moment diode D2, A phase inductance, triode T2 constitute one and hold circuit.At this moment, the winding voltage UA at A phase inductance two ends can be approximately equal to 0, and this moment, optocoupler 21 all ended with optocoupler 22.
Be illustrated in figure 4 as the drive system of the switched reluctance machines of position-sensor-free.
As shown in Figure 5, apparatus of the present invention comprise following ingredient: processor, ratio pressure sampling circuit, forward and reverse polarity of voltage metering circuit.Processor is 32 high-performance singlechip chip CPU, receives from the signal of ratio pressure sampling circuit and the output of forward and reverse polarity of voltage metering circuit; The AD sampling A is 12 high-precision AD conversion chips, links to each other with single-chip microcomputer through internal communication bus; Ratio pressure sampling circuit 1 comprises first resistance R 1, second resistance R 2; First resistance R 1,2 series connection of second resistance R; One end of first resistance R 1 is received the positive pole of direct supply Udc through the first connection terminal a; One end of second resistance R 2 is received the negative pole of direct supply Udc through the 3rd connection terminal c, and the tie point b of first resistance R 1, second resistance R 2 is connected on the analog-digital chip AD 11 simultaneously, as the analog input signal of AD11; Forward and reverse polarity of voltage testing circuit 2 comprises the 3rd resistance R 3 and optocoupler 21; The 4th resistance R 4 and optocoupler 22; The 3rd resistance R 3 one ends are received on the end of inductance L 1 through the 4th connection terminal d; The other end with receive on inductance L 1 other end through the 5th connection terminal e again after optocoupler 21 input ends are connected, the output terminal of optocoupler 21 is received respectively on internal reference power supply and the singlechip CPU 3, the 4th resistance R 4 one ends are received on the end of inductance L 1 through the 5th connection terminal e; The other end with receive on inductance L 1 other end through the 4th connection terminal d again after optocoupler 22 input ends are connected, the output terminal of optocoupler 22 is received respectively on internal reference power supply and the singlechip CPU 3.
Claims (1)
1. the pick-up unit of a winding voltage of switched reluctance motor; This device is connected in series single tube successively by ratio pressure sampling circuit (1) and holds circuit (4), the forward and reverse polarity of voltage testing circuit of winding (2), singlechip CPU (3) formation, and wherein the power end of ratio pressure sampling circuit (1) the serial connection forward and reverse polarity of voltage testing circuit of winding (2) is connected with external dc power respectively; It is characterized in that: the forward and reverse polarity of voltage testing circuit of said winding (2) comprises the 3rd resistance (R3), first optocoupler (21), the 4th resistance (R4) and second optocoupler (22); Wherein an end of the 3rd resistance (R3) holds the output terminal of circuit (4) through the 4th connection terminal (d) order pipe; The other end holds the input end of circuit (4) through the 5th connection terminal (e) order pipe after being connected in series first optocoupler (21) again; One termination the 5th connection terminal (e) of the 4th resistance (R4); The other end of the 4th resistance (R4) connects the 4th connection terminal (d) after being connected in series second optocoupler (22) again, and the output terminal of first optocoupler (21) and second optocoupler (22) connects the input end of singlechip CPU (3) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102645700A CN101726655B (en) | 2009-12-28 | 2009-12-28 | Measuring method and detecting device for winding voltage of switched reluctance motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102645700A CN101726655B (en) | 2009-12-28 | 2009-12-28 | Measuring method and detecting device for winding voltage of switched reluctance motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101726655A CN101726655A (en) | 2010-06-09 |
| CN101726655B true CN101726655B (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102645700A Expired - Fee Related CN101726655B (en) | 2009-12-28 | 2009-12-28 | Measuring method and detecting device for winding voltage of switched reluctance motor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520231B (en) * | 2011-12-15 | 2014-06-11 | 大连理工大学 | Detection circuit of switch magnetic resistance motor winding voltage and detection method thereof |
| CN113311248B (en) * | 2021-06-25 | 2022-05-10 | 安徽大学 | Stator coil inductance measuring method for reluctance type spherical motor |
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Owner name: NANTONG CHUNGUANG AUTOMATIC CONTROL EQUIPMENT ENGI Free format text: FORMER OWNER: SOWTHEAST UNIV. Effective date: 20140624 Owner name: SOWTHEAST UNIV. Effective date: 20140624 |
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Free format text: CORRECT: ADDRESS; FROM: 214135 WUXI, JIANGSU PROVINCE TO: 226600 NANTONG, JIANGSU PROVINCE |
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Effective date of registration: 20140624 Address after: 226600 Nantong, Haian Qu Qu Qu Town, the second floor Road, No. 98 Patentee after: Nantong Chunguang Automatic Control Equipment Engineering Co., Ltd. Patentee after: Southeast University Address before: 99 No. 214135 Jiangsu New District of Wuxi City Linghu Avenue Patentee before: Southeast University |
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Granted publication date: 20120411 Termination date: 20191228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |