CN204794777U - Brushless motor rotor position error calibrating device - Google Patents
Brushless motor rotor position error calibrating device Download PDFInfo
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- CN204794777U CN204794777U CN201520515740.9U CN201520515740U CN204794777U CN 204794777 U CN204794777 U CN 204794777U CN 201520515740 U CN201520515740 U CN 201520515740U CN 204794777 U CN204794777 U CN 204794777U
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Abstract
The utility model discloses a brushless motor rotor position error calibrating device belongs to the technical field of electric machine control, and the device includes: detection circuitry for acquire electric motor rotor position sigual, the measuring circuit links to each other with detection circuitry, is used for the basis electric motor rotor position sigual divides into the electricity cycle a plurality of intervals and measures each interval width, control circuit links to each other with the measuring circuit for calculate the difference between each interval width, and output control signal, compensating circuit links to each other with control circuit, is used for the basis difference between each interval width of control signal compensation makes difference be less than the precision numerical value that sets up. The utility model discloses make the difference between each interval width satisfy the required precision that sets up, and then improve motor moving stationarity. The utility model discloses but the wide application is in the calibration of brushless motor's control, especially electric motor rotor position.
Description
Technical field
The utility model relates to a kind of position of rotor of brushless motor and to calibrate for error device, belongs to the technical field of Electric Machine Control.
Background technology
Have benefited from materialogy, the develop rapidly of control theory and integrated circuit technique, brushless electric machine is applied in industrial and agricultural production, communications and transportation, national defense and military and daily life more and more widely.The application of control theory on brushless electric machine makes Electric Machine Control day by day superior, also day by day complicated.Motor control algorithms depends on motor rotor position, and motor rotor position can be obtained by position-sensor-free algorithm or position transducer.Consider the complexity of position-sensor-free algorithm and the shortcoming to aspects such as the sensitiveness of the parameter of electric machine thereof, current brushless electric machine more use location transducer obtains motor rotor position.
Usually, needing the motor rotor position according to obtaining, obtaining meticulousr motor rotor position by methods such as interpolation.Now, site error can produce considerable influence to Electric Machine Control.Consider in Electric Machine Control and suitable advance angle generally can be adopted to adjust the overall phase place of each phase driving voltage, the absolute error of motor rotor position can be calibrated together while advance angle adjustment; But the difference of each interval width, the relative error namely between each position transducer, then cannot calibrate together with the adjustment of advance angle.Difference between interval width can affect the phase voltage after modulation and phase current waveform, and then affects the stationarity of output torque and motor rotation.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of position of rotor of brushless motor is provided to calibrate for error device, solve the phase voltage after the differentia influence modulation between existing brushless electric machine interval width and phase current waveform, and then affect the problem of stationarity of output torque and motor rotation.
The utility model specifically solves the problems of the technologies described above by the following technical solutions:
A kind of position of rotor of brushless motor calibrates for error device, and described device comprises:
Testing circuit, for obtaining motor rotor position signal;
Measuring circuit, is connected with testing circuit, for the electricity cycle being divided into some intervals and measuring the width in each interval according to described motor rotor position signal;
Control circuit, is connected with measuring circuit, for calculating the difference between each interval width, and exports control signal;
Compensating circuit, is connected with control circuit, for compensating the difference between each interval width according to described control signal, makes difference be less than set accurate values.
Further, as a kind of optimal technical scheme of the present utility model: described testing circuit comprises position transducer, and the signal be connected with position transducer amplifies and comparison circuit.
Further, as a kind of optimal technical scheme of the present utility model: described measuring circuit adopts the width in each interval of counter measures.
Further, as a kind of optimal technical scheme of the present utility model: described compensating circuit comprises imbalance Circuit tuning, described imbalance Circuit tuning amplifies with signal and is connected with comparison circuit.
Further, as a kind of optimal technical scheme of the present utility model: described compensating circuit also comprises interval calibration control circuit and digital compensation circuit, described interval calibration control circuit is connected with digital compensation circuit, and described digital compensation circuit is connected with counter.
The utility model adopts technique scheme, can produce following technique effect:
Position of rotor of brushless motor provided by the utility model calibrates for error device and method, by measuring the width in each interval of motor rotor position and compensating its difference, finally make the difference between each interval width meet set required precision, and then improve the stationarity of motor rotation.The utility model can be widely used in the control of brushless electric machine, in the calibration of especially motor rotor position.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram in a kind of three-phase brushless motor rotor-position signal that Fig. 1 provides for the utility model embodiment and interval.
Fig. 2 to calibrate for error the system block diagram of device for a kind of position of rotor of brushless motor that the utility model embodiment provides.
Fig. 3 to calibrate for error the system block diagram of device for a kind of position of rotor of brushless motor that the utility model embodiment provides.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.Should be clear and definite, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Brushless electric machine often adopts the Hall element of some to detect motor rotor position, according to each Hall element signal, 360 ° of electric cycles is divided into corresponding interval.For three-phase brushless motor, the Hall element perception rotor-position equidistantly installed by 3 is also divided the electricity cycle.As shown in Figure 1, the differential output signal of 3 Hall elements through amplification and relatively after, obtain corresponding digital signal, and accordingly 360 ° of electric cycles be divided into 6 intervals.The width in each interval amplified by the relative error of Hall element mechanical erection, signal and the imbalance etc. of comparison circuit affects, and therefore may show difference more or less.This species diversity can cause the difference of each interval Motor torque, and then affects the stationarity of motor rotation.
The utility model example one provides a kind of position of rotor of brushless motor and to calibrate for error the schematic diagram of device, as shown in Figure 2, comprises signal and amplifies and comparison circuit 110, interval width measuring circuit 120 and Circuit tuning 130 of lacking of proper care.Wherein, the differential output signal of Hall element amplifies with signal and is connected with the output of comparison circuit 110, and described signal amplifies and is connected with interval width measuring circuit 120 with the output of comparison circuit 110; And described imbalance Circuit tuning 130 amplifies with interval width measuring circuit 120, signal respectively and is connected with comparison circuit 110.
In Fig. 2, V1P and V1M, V2P and V2M, VnP and VnM are the differential signal of the 1st, 2 and n Hall element output respectively.After signal amplifies and to amplify the differential signal inputted with comparison circuit 110 and compare, acquisition digital signal H1, H2 and Hn; According to described digital signal, interval width measuring circuit 120 obtains the width in each interval by counter measures; Imbalance Circuit tuning 130 is according to the difference between each interval width, and adjustment signal amplifies the imbalance with comparison circuit 110, and then reduces this species diversity.Above-mentioned interval width is measured and is continued to carry out with imbalance adjustment, until the difference between each interval width meets set accurate values, or reaches the limit of imbalance adjustment.After calibration terminates, output motor rotor-position signal and interval width.
Further, signal is amplified the adjustment of lacking of proper care with comparison circuit 110 and can be inputted to manage or the size of output loading adjusts by differential amplifier circuit.
The utility model example two provides a kind of position of rotor of brushless motor and to calibrate for error the schematic diagram of device, as shown in Figure 3, comprise signal amplification and calibrate control circuit 230 and interval width digital compensation circuit 240 with comparison circuit 110, interval width measuring circuit 120, interval.Wherein, described interval width measuring circuit 120 calibrates control circuit 230 with interval respectively, interval width digital compensation circuit 240 is connected, and described interval calibration control circuit 230 is also connected with interval width digital compensation circuit 240.
In Fig. 3, V1P and V1M, V2P and V2M, VnP and VnM are the differential signal of the 1st, 2 and n Hall element output respectively.After signal amplifies and to amplify the differential signal inputted with comparison circuit 110 and compare, acquisition digital signal H1, H2 and Hn; According to described digital signal, interval width measuring circuit 120 obtains the width in each interval by counter measures; Interval calibration control circuit 230 calculates the difference between each interval width, and output interval width calibration control coding; Interval width digital compensation circuit 240 compensates each interval width according to described calibration control coding.After compensation, output motor rotor-position signal and interval width.
Further, interval width digital compensation circuit 240 can add values of disparity, to complete the compensation of interval width by adder on the basis of original each interval width measurement numerical value; Certain coefficient can also be multiplied by complete the compensation of interval width on the basis of original each interval width measurement numerical value by multiplication unit.
Above-mentioned interval width is measured and is continued to carry out with imbalance adjustment, until the difference between each interval width meets set accurate values, or reaches the limit of imbalance adjustment.
Professional should recognize further, in conjunction with the circuit unit of each example that embodiment disclosed herein describes, can realize with electronic hardware module, generally describe composition and the annexation of each example in the above description according to function.Particularly, the computing of described electronic hardware module and control section can dredging collateral logic hardware realize, and it can be use the produced logical integrated circuit of existing integrated circuit technology, and the present embodiment is not construed as limiting this.
Further, in the utility model, all adopt electronic hardware module, utilize technology for detection commonly known in the art, transmission, calculating and compensation.Electronic hardware module is not made improvements itself, also do not also have specific method flow.The correlation module related in the utility model and the function of realization thereof be hardware after improvement and formation thereof device on carry computer software programs conventional in prior art or pertinent protocols just can realize, be not that computer software programs of the prior art or pertinent protocols are improved.Innovation of the present utility model is the improvement of hardware module in prior art and connects syntagmatic, but not be in hardware module for realizing the improvement of software or the agreement of carrying about function.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only embodiment of the present utility model; and be not used in restriction protection range of the present utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. position of rotor of brushless motor calibrates for error a device, and it is characterized in that, described device comprises:
Testing circuit, for obtaining motor rotor position signal;
Measuring circuit, is connected with testing circuit, for the electricity cycle being divided into some intervals and measuring the width in each interval according to described motor rotor position signal;
Control circuit, is connected with measuring circuit, for calculating the difference between each interval width, and exports control signal;
Compensating circuit, is connected with control circuit, for compensating the difference between each interval width according to described control signal, makes difference be less than set accurate values.
2. position of rotor of brushless motor calibrates for error device according to claim 1, and it is characterized in that, described testing circuit comprises position transducer, and the signal be connected with position transducer amplifies and comparison circuit.
3. position of rotor of brushless motor calibrates for error device according to claim 1, it is characterized in that, described measuring circuit adopts the width in each interval of counter measures.
4. position of rotor of brushless motor calibrates for error device according to claim 2, and it is characterized in that, described compensating circuit comprises imbalance Circuit tuning, and described imbalance Circuit tuning amplifies with signal and is connected with comparison circuit.
5. position of rotor of brushless motor calibrates for error device according to claim 3, it is characterized in that, described compensating circuit also comprises interval calibration control circuit and digital compensation circuit, and described interval calibration control circuit is connected with digital compensation circuit, and described digital compensation circuit is connected with counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515740.9U CN204794777U (en) | 2015-07-16 | 2015-07-16 | Brushless motor rotor position error calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515740.9U CN204794777U (en) | 2015-07-16 | 2015-07-16 | Brushless motor rotor position error calibrating device |
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| Publication Number | Publication Date |
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| CN204794777U true CN204794777U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520515740.9U Expired - Fee Related CN204794777U (en) | 2015-07-16 | 2015-07-16 | Brushless motor rotor position error calibrating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071718A (en) * | 2015-07-16 | 2015-11-18 | 周海波 | Rotor position error calibration apparatus and method for brushless motor |
| CN109560743A (en) * | 2018-12-26 | 2019-04-02 | 歌尔股份有限公司 | Motor compensating method, apparatus, driver and system |
-
2015
- 2015-07-16 CN CN201520515740.9U patent/CN204794777U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071718A (en) * | 2015-07-16 | 2015-11-18 | 周海波 | Rotor position error calibration apparatus and method for brushless motor |
| CN109560743A (en) * | 2018-12-26 | 2019-04-02 | 歌尔股份有限公司 | Motor compensating method, apparatus, driver and system |
| WO2020135389A1 (en) * | 2018-12-26 | 2020-07-02 | 歌尔股份有限公司 | Motor compensation method and device, driver, and system |
| CN109560743B (en) * | 2018-12-26 | 2020-10-02 | 歌尔股份有限公司 | Motor compensation method, device, driver and system |
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Effective date of registration: 20160215 Address after: 214500, No. 68-10, Third Ring Road, Chengbei Park, Jingjiang Economic Development Zone, Taizhou, Jiangsu, Jingjiang Patentee after: JIANGSU JIXIANG AIR CONDITIONING EQUIPMENT Co.,Ltd. Address before: 702, room 210011, block A, No. 611, Gulou, Nanjing, Zhongshan North Road, Jiangsu Patentee before: Zhou Haibo |
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Granted publication date: 20151118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |