CN102545743B - Smooth control method for torque of switched reluctance motor - Google Patents
Smooth control method for torque of switched reluctance motor Download PDFInfo
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- CN102545743B CN102545743B CN201010607099.3A CN201010607099A CN102545743B CN 102545743 B CN102545743 B CN 102545743B CN 201010607099 A CN201010607099 A CN 201010607099A CN 102545743 B CN102545743 B CN 102545743B
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Abstract
The invention relates to a smooth control method for the torque of a switched reluctance motor. The control mode of the switched reluctance motor is a current chopping control mode. When two phases are simultaneously conducted, the currents of two-phase conducting regions in the current chopping control mode are respectively reduced to preset current amplitude values, and the torque amplitude when the two phases are simultaneously conducted approaches to the torque amplitude when one phase is conducted. According to the smooth control method, the torque amplitude when the two phases are simultaneously conducted approaches to the torque amplitude when one phase is conducted, so that the torque fluctuation is effectively inhibited, the torque pulsation is reduced, and the torque is smoothly controlled.
Description
Technical field
The present invention relates to the driving field of switched reluctance machines, especially relate to the smooth control method for torque of switched reluctance machines.
Background technology
Switched reluctance machines (Switched Reluctance Motor, be called for short SRM) is because of simple in structure, firm, low cost of manufacture, and speed-regulating range width and efficiency advantages of higher, become the newcomer who has potentiality in variable speed drive system.Yet SRM, due to biconvex plate structure and switch form power supply, has caused its inevitable torque ripple shortcoming, and the noise problem causing has thus produced inhibition to the further expansion of its application.Reducing SRM torque ripple is outstanding problem and the Research Challenges of current power transmission and Electric Machine Control circle.
Torque ripple phenomenon when high-speed cruising because pulse frequency is higher, general manufacturing machine be there is no to impact, also be difficult to perceive, but at SRM in starting or during low cruise, torque ripple frequency reduces, its fluctuation amplitude is large, and impact also may strengthen thereupon, and when serious, even motor has a kind of " stepping " sensation.SRM is when starting or low cruise, the pressure drop that revolving electro-motive force causes is little, the time of inductance rising stage is long, and electric current rate is quite large over time, for avoiding excessive Peak of current pulse, the existing current chopping control models that adopt as shown in Figure 1 more, in one of SRM is conducted the cycle, the waveshape monitor of electric current is at steady state value, the effective value of electric current is limited in unique amplitude Im, conducting 180 degree electrical degrees, the torque amplitude as shown in Figure 2 that there will be simultaneously conducting and of two-phase to be conducted to produce is different, essential reason is because nonlinear torque characteristics.
Summary of the invention
For above-mentioned defect of the prior art, the invention provides a kind of smooth control method for torque of switched reluctance machines, to solve a larger problem of torque ripple amplitude that is conducted and causes with simultaneously conducting of two-phase.
The smooth control method for torque of switched reluctance machines provided by the invention, the control model of switched reluctance machines is current chopping control model, wherein when two-phase conducting simultaneously, in described current chopping control model the two interval electric current that is conducted is dropped to respectively to predetermined current amplitude, and the torque amplitude while making two-phase conducting simultaneously approaches a torque amplitude while being conducted.
The degree of closeness of the torque amplitude when torque amplitude and of described predetermined current amplitude during according to simultaneously conducting of two-phase is conducted is determined.
When the lower-speed state of switched reluctance machines, when simultaneously conducting of two-phase, the interval electric current that is conducted of two in described current chopping control model is dropped to respectively to predetermined current amplitude.
The lower-speed state of switched reluctance machines comprises starting state and low cruise state.
Described low cruise state comprises low cruise state in electronic situation and the low cruise state under brake condition.
The smooth control method for torque of a kind of switched reluctance machines of the present invention, when two-phase conducting simultaneously, by the two interval current amplitudes that are conducted are dropped to predetermined current amplitude, torque amplitude while making simultaneously conducting of two-phase approaches a torque amplitude while being conducted, effectively suppress the fluctuation of torque, reduce torque pulsation, realized the level and smooth control of torque.
Accompanying drawing explanation
Fig. 1 is each phase current waveform of the existing current chopping control model of switched reluctance machines;
Fig. 2 is the torque waveform during corresponding to the current chopping control model adopting shown in Fig. 1;
Fig. 3 is each phase current waveform of the current chopping control model that adopts in the smooth control method for torque of switched reluctance machines of the present invention;
Fig. 4 is the torque waveform during corresponding to the current chopping control model adopting shown in Fig. 3.
Embodiment
The smooth control method for torque of switched reluctance machines provided by the invention, the control model of switched reluctance machines is current chopping control model, wherein when two-phase conducting simultaneously, in described current chopping control model the two interval electric current that is conducted is dropped to respectively to predetermined current amplitude, and the torque amplitude while making two-phase conducting simultaneously approaches a torque amplitude while being conducted.
As shown in Figure 3, Figure 4, adopt current chopping control model to control the rotating speed of switched reluctance machines, when one is conducted, the current amplitude in conducting interval is Im, when two-phase conducting simultaneously, the two interval electric currents that are conducted are dropped to respectively to predetermined current amplitude Id, and the torque amplitude while making two-phase conducting simultaneously approaches a torque amplitude while being conducted.Particularly, as interval in the conducting of 0-60 degree, conducting when A phase is identical with C, A phase and C are down to respectively predetermined current amplitude Id at the electric current in 0-60 degree conducting interval, when A phase is identical with C during conducting corresponding torque waveform as shown in the CA section in Fig. 4; Interval in the conducting of 60-120 degree, only have A to be conducted, A remains unchanged at the current amplitude Im in 60-120 degree conducting interval, and torque waveform corresponding when A is conducted is as shown in the A section in Fig. 4; Interval in the conducting of 120-180 degree, conducting when A phase is identical with B, A phase and B are down to respectively predetermined current amplitude Id at the electric current in 120-180 degree conducting interval, when A phase is identical with B during conducting corresponding torque waveform as shown in the AB section in Fig. 4; Interval in the conducting of 180-240 degree, only have B to be conducted, B remains unchanged at the current amplitude Im in 60-120 degree conducting interval, and torque waveform corresponding when B is conducted is as shown in the B section in Fig. 4; Interval in the conducting of 240-300 degree, conducting when B phase is identical with C, B phase and C are down to respectively predetermined current amplitude Id at the electric current in 240-300 degree conducting interval, when B phase is identical with C during conducting corresponding torque waveform as shown in the BC section in Fig. 4; Interval in the conducting of 300-360 degree, only have C to be conducted, C remains unchanged at the current amplitude Im in 300-360 degree conducting interval, and torque waveform corresponding when C is conducted is as shown in the C section in Fig. 4; So far 0-360 degree one week circulation is complete, follow-uply enters a new cycle period.
During simultaneously conducting of two-phase, the degree of closeness of the torque amplitude when torque amplitude and a when predetermined current amplitude that interval electric current is down to that two are conducted can be according to two-phase conducting is simultaneously conducted is determined.Can be by experiment, the method such as calculating, emulation obtains.Preferably, the current amplitude in conducting interval during by the conducting simultaneously of suitable reduction two-phase, can realize one be conducted and during two-phase while conducting the amplitude of torque consistent.
The smooth control method for torque of switched reluctance machines provided by the invention is applicable to require under lower-speed state the more level and smooth driving occasion of torque.When the lower-speed state of switched reluctance machines, when simultaneously conducting of two-phase, the interval electric current that is conducted of two in described current chopping control model is dropped to respectively to predetermined current amplitude.
The lower-speed state of switched reluctance machines can be starting state or low cruise state.
During starting state, adopt the present invention can solve one and be conducted and the larger problem of torque ripple amplitude that two-phase conducting simultaneously causes, can suppress significantly the fluctuation of torque under starting state, realize the smooth start of switched reluctance machines.
Low cruise state can be the low cruise state in electronic situation, or the low cruise state under brake condition.During low cruise state in electronic situation, adopting the present invention can solve one is conducted and the larger problem of torque ripple amplitude that two-phase conducting simultaneously causes, can suppress significantly the fluctuation of torque under low speed running status in electronic situation, realize the even running of switched reluctance machines under low cruise state.Low cruise state under brake condition, adopting the present invention can solve one is conducted and the larger problem of torque ripple amplitude that two-phase conducting simultaneously causes, can suppress significantly the fluctuation of torque under low speed running status under brake condition, realize the gradual braking of switched reluctance machines.
To sum up, the smooth control method for torque of switched reluctance machines provided by the invention, when two-phase conducting simultaneously, by the two interval current amplitudes that are conducted are dropped to predetermined current amplitude, torque amplitude while making simultaneously conducting of two-phase approaches a torque amplitude while being conducted, effectively suppress the fluctuation of torque, reduced torque pulsation, realize the level and smooth control of torque.
Finally it should be noted that: the above is optimum implementation of the present invention, but protection scope of the present invention is not limited to this, and under shown in the present, anyone any product identical or approximate with the present invention and way, all drop in protection scope of the present invention.
Claims (5)
1. the smooth control method for torque of a switched reluctance machines, the control model of switched reluctance machines is current chopping control model, it is characterized in that, when two-phase conducting simultaneously, in described current chopping control model two each the interval conducting phase current magnitude that is conducted is dropped to respectively to predetermined current amplitude, and the torque amplitude while making two-phase conducting simultaneously approaches a torque amplitude while being conducted.
2. the smooth control method for torque of switched reluctance machines according to claim 1, is characterized in that, the degree of closeness of the torque amplitude when torque amplitude and of described predetermined current amplitude during according to simultaneously conducting of two-phase is conducted is determined.
3. the smooth control method for torque of switched reluctance machines according to claim 1, it is characterized in that, when the lower-speed state of switched reluctance machines, when simultaneously conducting of two-phase, each the interval conducting phase current magnitude that is conducted of two in described current chopping control model is dropped to respectively to predetermined current amplitude.
4. the smooth control method for torque of switched reluctance machines according to claim 1, is characterized in that, the lower-speed state of switched reluctance machines comprises starting state and low cruise state.
5. the smooth control method for torque of switched reluctance machines according to claim 4, is characterized in that, described low cruise state comprises low cruise state in electronic situation and the low cruise state under brake condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010607099.3A CN102545743B (en) | 2010-12-27 | 2010-12-27 | Smooth control method for torque of switched reluctance motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010607099.3A CN102545743B (en) | 2010-12-27 | 2010-12-27 | Smooth control method for torque of switched reluctance motor |
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| Publication Number | Publication Date |
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| CN102545743A CN102545743A (en) | 2012-07-04 |
| CN102545743B true CN102545743B (en) | 2014-08-06 |
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| CN201010607099.3A Expired - Fee Related CN102545743B (en) | 2010-12-27 | 2010-12-27 | Smooth control method for torque of switched reluctance motor |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201303417D0 (en) * | 2013-02-26 | 2013-04-10 | Nidec Sr Drives Ltd | Control of a brushless electrical machine |
| CN103607160B (en) * | 2013-12-03 | 2016-04-06 | 山东省科学院自动化研究所 | A kind of Current cut control device and implementation method |
| CN104333276B (en) * | 2014-08-27 | 2017-02-15 | 中国矿业大学 | Torque ripple two-level inhibition method of three-phase switched reluctance motor |
| CN104242745B (en) * | 2014-08-27 | 2016-10-26 | 中国矿业大学 | A kind of four phase switch reluctance motor torque ripple three level suppressing method |
| CN113922709A (en) * | 2020-07-10 | 2022-01-11 | 丁金龙 | Control method and device for switched reluctance motor |
Citations (3)
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|---|---|---|---|---|
| CN1195921A (en) * | 1997-03-20 | 1998-10-14 | 三星电子株式会社 | Current control apparatus in switched reluctance motor |
| CN1389978A (en) * | 2001-06-06 | 2003-01-08 | 开关磁阻驱动有限公司 | Excitation of switch magnetic resistance motor |
| CN1758528A (en) * | 2005-10-11 | 2006-04-12 | 中国矿业大学 | Output torque depulsation control method for switch reluctance servo motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02206389A (en) * | 1989-01-31 | 1990-08-16 | Daikin Ind Ltd | Torque pulsation reducing method for reluctance motor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195921A (en) * | 1997-03-20 | 1998-10-14 | 三星电子株式会社 | Current control apparatus in switched reluctance motor |
| CN1389978A (en) * | 2001-06-06 | 2003-01-08 | 开关磁阻驱动有限公司 | Excitation of switch magnetic resistance motor |
| CN1758528A (en) * | 2005-10-11 | 2006-04-12 | 中国矿业大学 | Output torque depulsation control method for switch reluctance servo motor |
Non-Patent Citations (5)
| Title |
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| JP平H2-206389A 1990.08.16 |
| 开关磁阻电机互感及转矩脉动抑制技术的研究;曲兵妮;《中国博士论文全文数据库》;20100831;第85页第2段、第97页第3段 * |
| 开关磁阻电机高性能转矩控制策略研究;郑洪涛等;《电工技术学报》;20050926;第20卷(第9期);全文 * |
| 曲兵妮.开关磁阻电机互感及转矩脉动抑制技术的研究.《中国博士论文全文数据库》.2010, |
| 郑洪涛等.开关磁阻电机高性能转矩控制策略研究.《电工技术学报》.2005,第20卷(第9期),第24-28页. |
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Owner name: NIDEC (BEIJING) DRIVE SYSTEM TECHNIQUE CO., LTD. Free format text: FORMER OWNER: BEIJING CHINA TEX MECHANICAL + ELECTRICAL ENGINEERING LTD. Effective date: 20150803 |
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