CN112865620A - Starting method of direct-current brushless motor - Google Patents
Starting method of direct-current brushless motor Download PDFInfo
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- CN112865620A CN112865620A CN202110056802.4A CN202110056802A CN112865620A CN 112865620 A CN112865620 A CN 112865620A CN 202110056802 A CN202110056802 A CN 202110056802A CN 112865620 A CN112865620 A CN 112865620A
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- brushless motor
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- starting
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000001939 inductive effect Effects 0.000 claims description 52
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
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- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a starting method of a direct current brushless motor, which carries out self-checking on the states of three Hall sensors in the direct current brushless motor, and when all three Hall sensors fail or only one Hall sensor fails, an MCU control device can control the direct current brushless motor to carry out induction mode starting; when two or three arbitrary hall sensors all became invalid, the MCU controlling means steerable direct current brushless motor carries out the noninductive mode and starts, can realize having of direct current brushless motor and noninductive start and control simultaneously, has solved the problem that hall sensor damages and can not start to extension direct current brushless motor's life.
Description
[ technical field ]
The invention relates to a motor, in particular to a starting method of a direct current brushless motor.
[ background art ]
The existing direct current brushless motor can only be started with or without a sense, particularly the direct current brushless motor applied to household appliances such as fan lamps and the like is started with a sense, and the direct current brushless motor started with a sense needs to be provided with a Hall sensor to detect information of a rotor, so that the product cost is improved; meanwhile, the Hall sensor is a component with high sensitivity and is easy to damage. When the Hall sensor is damaged, the direct current brushless motor cannot be normally started to use, so that the product is scrapped; the direct current brushless motor with part of non-inductive starting has the defects of shaking and noise due to low-speed rotation in the non-inductive starting process, unsmooth speed changing and gear shifting process, large abrasion and the like, so that the using effect of people is influenced.
The present invention has been made in view of the above-mentioned disadvantages.
[ summary of the invention ]
The invention overcomes the defects of the technology and provides the starting method of the direct current brushless motor, which can self-check and judge the states of three Hall sensors on the direct current brushless motor so as to realize the inductive starting or the non-inductive starting.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a starting method of a direct current brushless motor, which is characterized by comprising the following steps: the method comprises the following steps that the states of three Hall sensors in the direct-current brushless motor are self-checked, and when none of the three Hall sensors fail or only one of the three Hall sensors fails, the MCU control device controls the direct-current brushless motor to start in a sensing mode; when any two or three Hall sensors fail, the MCU control device controls the DC brushless motor to start in a non-inductive mode.
The starting method of the brushless dc motor includes the following specific steps:
step S1, after the DC brushless motor is electrified, the MCU control device starts according to the starting mode of the state of the Hall sensors memorized in Flash before the DC brushless motor loses power last time, and after the motor rotor rotates, the MCU control device detects and judges whether the failure states of the three Hall sensors at present are the same as those recorded in Flash or not; if the two are the same, the step S3 is skipped to, and if the two are not the same, the step S2 is skipped to;
step S2, the MCU control device reselects an alternative starting mode according to the failure states detected by the three Hall sensors again so as to restart the rotor of the DC brushless motor, updates and stores the failure state values of the Hall sensors into Flash, and jumps to step 3;
and step S3, the MCU control device continues to output power driving signals to the DC brushless motor according to the selected starting mode, so that the DC brushless motor is started in a sensing mode or a non-sensing mode.
The starting method of the brushless dc motor is characterized in that: step S3 further includes:
step S301, when all three Hall sensors fail or only one Hall sensor fails, the MCU control device controls the DC brushless motor to start in a sensing mode according to the selected sensing starting mode;
and step S302, when any two or three Hall sensors fail, the MCU control device controls the DC brushless motor to start in a non-inductive mode according to the selected non-inductive starting mode.
The starting method of the brushless dc motor is characterized in that: the sensing mode in step S301 is started, and the MCU control device outputs a power driving signal to control the rotation of the dc brushless motor according to the position, speed and direction information of the rotor detected by the three hall sensors or any two hall sensors.
The starting method of the brushless dc motor is characterized in that: the three Hall sensors are respectively a Hall sensor A, a Hall sensor B and a Hall sensor C; the inductive starting mode in the step S301 comprises a first inductive starting mode in which the Hall sensor A, the Hall sensor B and the Hall sensor C are not invalid; a second inductive starting mode in which the Hall sensor A fails and the Hall sensor B and the Hall sensor C do not fail; a third inductive starting mode in which the Hall sensor B fails and neither the Hall sensor A nor the Hall sensor C fails; and a fourth inductive starting mode in which the Hall sensor C fails and the Hall sensor A and the Hall sensor B do not fail.
The starting method of the brushless dc motor is characterized in that: the non-inductive starting mode in step S302 is that the MCU control device outputs a power driving signal to the dc brushless motor and collects a back electromotive force signal generated by the rotation of the dc brushless motor, and the MCU control device calculates the rotor displacement according to the back electromotive force signal and correspondingly outputs a power driving signal to the dc brushless motor according to the rotor displacement information, so as to perform non-inductive starting of the dc brushless motor.
The starting method of the brushless dc motor is characterized in that: the MCU control device is internally provided with a program for calculating rotor displacement information according to the back electromotive force signal.
The starting method of the brushless dc motor is characterized in that: the Flash is arranged in the MCU control device.
The starting method of the brushless dc motor is characterized in that: the MCU control device is provided with a speed regulation input end for inputting a speed regulation instruction of the DC brushless motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can self-check and judge the states of three Hall sensors in the DC brushless motor, thereby executing the inductive starting or the non-inductive starting and realizing the simultaneous control of the inductive starting and the non-inductive starting of the DC brushless motor.
2. When the device is started, the corresponding starting can be carried out according to the starting mode of the failure states of the three Hall sensors recorded in the Flash before the last power failure, so that the use experience of a user is improved, and the longer service life of the product is ensured.
3. According to the invention, after the motor rotor rotates, the three Hall sensors are self-checked and compared with the failure states of the three Hall sensors recorded in Flash before the last power failure, when the two failure states are different, the starting mode is automatically updated, and the state of the newly failed Hall sensor is stored in Flash, so that the automatic updating of the starting mode of the direct current brushless motor is realized.
4. The inductive starting mode of the direct current brushless motor comprises a first inductive starting mode in which a Hall sensor A, a Hall sensor B and a Hall sensor C are not invalid; a second inductive starting mode in which the Hall sensor A fails and the Hall sensor B and the Hall sensor C do not fail; a third inductive starting mode in which the Hall sensor B fails and neither the Hall sensor A nor the Hall sensor C fails; and the MCU control device selects the corresponding inductive starting mode according to the failure states of the three Hall sensors to realize inductive starting, so that the direct current brushless motor is stably started, quietly rotates at a low speed and smoothly shifts gears at a variable speed.
5. The non-inductive starting mode of the direct current brushless motor comprises the steps that when any two Hall sensors fail or all three Hall sensors fail, the MCU control device collects a counter electromotive force signal generated by the rotation of the direct current brushless motor and calculates a rotor position signal according to the counter electromotive force signal, so that the non-inductive starting is carried out, the problem that the existing direct current brushless motor cannot be started after the Hall sensors fail is solved, and the service life of the direct current brushless motor is prolonged.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a sensible start mode of the present invention;
FIG. 2 is a diagram illustrating a non-inductive startup mode according to the present invention.
[ detailed description of the invention ]
The following is a more detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings of which:
as shown in fig. 1-2, the starting method of a dc brushless motor according to the present invention is to perform self-checking on the states of three hall sensors in the dc brushless motor, and when none of the three hall sensors fails or only one of the hall sensors fails, the MCU control device controls the dc brushless motor to start in a sensing mode; when any two or three Hall sensors fail, the MCU control device controls the DC brushless motor to start in a non-inductive mode, so that the inductive start and the non-inductive start of the DC brushless motor are combined and controlled, the inductive start of the DC brushless motor is preferentially selected, and the DC brushless motor is stably started, quietly rotates at a low speed and realizes smooth speed change and gear shifting.
The invention discloses a starting method of a direct current brushless motor, which comprises the following specific steps:
step S1, after the DC brushless motor is electrified, the MCU control device starts according to the starting mode of the failure state of the Hall sensor memorized in Flash before the last power loss, and the motor rotor detects and judges whether the current three Hall failure states are the same as those recorded in Flash after rotating; if the current values are the same, the step S3 is skipped, and the direct current brushless motor can be started smoothly, so that the use experience of a user is improved; if not, jumping to step S2 to ensure that the DC brushless motor can be started normally;
step S2, the MCU control device reselects an alternative starting mode according to the failure states detected by the three Hall sensors again so as to restart the rotor of the DC brushless motor, updates and stores the failure state values of the Hall sensors into Flash, and jumps to step 3;
and step S3, the MCU control device continues to output power driving signals to the DC brushless motor according to the selected starting mode, so that the DC brushless motor is started in a sensing mode or a non-sensing mode.
Step S3 further includes:
step S301, when all three Hall sensors fail or only one Hall sensor fails, the MCU control device controls the DC brushless motor to start in a sensing mode according to the selected sensing starting mode, as shown in FIG. 1;
in step S302, when any two or three hall sensors fail, the MCU control device controls the dc brushless motor to start in the non-inductive mode according to the selected non-inductive start mode, as shown in fig. 2.
In step S301, the MCU control device outputs a power driving signal according to the position, speed and direction information of the rotor detected by the three hall sensors or any two hall sensors, and accordingly controls the dc brushless motor to rotate, as shown in fig. 1.
Meanwhile, the three Hall sensors are respectively a Hall sensor A, a Hall sensor B and a Hall sensor C; the inductive starting mode in the step S301 comprises a first inductive starting mode in which the Hall sensor A, the Hall sensor B and the Hall sensor C are not invalid; a second inductive starting mode in which the Hall sensor A fails and the Hall sensor B and the Hall sensor C do not fail; a third inductive starting mode in which the Hall sensor B fails and neither the Hall sensor A nor the Hall sensor C fails; and a fourth inductive starting mode in which the Hall sensor C fails and the Hall sensor A and the Hall sensor B do not fail. The MCU control device selects a corresponding inductive starting mode according to the failure states of the three Hall sensors to realize inductive starting, so that the direct current brushless motor is started stably and shifts gears smoothly at variable speed.
The MCU control device is internally provided with a program for calculating rotor displacement information according to the back electromotive force signal. The non-inductive starting mode described in step S302 is that the MCU control device outputs a power driving signal to the dc brushless motor and collects a back electromotive force signal generated by the rotation of the dc brushless motor, and the MCU control device calculates the rotor displacement according to the back electromotive force signal and correspondingly outputs the power driving signal to the dc brushless motor according to the rotor displacement information, so as to perform non-inductive starting of the dc brushless motor, as shown in fig. 2, thereby solving the problem that the existing dc brushless motor cannot be started after the hall sensor fails, and thus prolonging the service life of the dc brushless motor.
As shown in fig. 1-2, Flash is arranged in the MCU control device, so that the MCU control device can quickly read the recorded information in Flash and compare and interpret the information; the MCU control device is provided with a speed regulation input end for inputting a speed regulation instruction of the DC brushless motor so as to be accessed to the extended control.
Claims (9)
1. A starting method of a brushless DC motor is characterized in that: the method comprises the following steps that the states of three Hall sensors in the direct-current brushless motor are self-checked, and when none of the three Hall sensors fail or only one of the three Hall sensors fails, the MCU control device controls the direct-current brushless motor to start in a sensing mode; when any two or three Hall sensors fail, the MCU control device controls the DC brushless motor to start in a non-inductive mode.
2. The method according to claim 1, comprising the steps of:
step S1, after the DC brushless motor is electrified, the MCU control device starts according to the starting mode of the state of the Hall sensors memorized in Flash before the DC brushless motor loses power last time, and after the motor rotor rotates, the MCU control device detects and judges whether the failure states of the three Hall sensors at present are the same as those recorded in Flash or not; if the two are the same, the step S3 is skipped to, and if the two are not the same, the step S2 is skipped to;
step S2, the MCU control device reselects an alternative starting mode according to the failure states detected by the three Hall sensors again so as to restart the rotor of the DC brushless motor, updates and stores the failure state values of the Hall sensors into Flash, and jumps to step 3;
and step S3, the MCU control device continues to output power driving signals to the DC brushless motor according to the selected starting mode, so that the DC brushless motor is started in a sensing mode or a non-sensing mode.
3. A starting method of a brushless dc motor according to claim 2, wherein: step S3 further includes:
step S301, when all three Hall sensors fail or only one Hall sensor fails, the MCU control device controls the DC brushless motor to start in a sensing mode according to the selected sensing starting mode;
and step S302, when any two or three Hall sensors fail, the MCU control device controls the DC brushless motor to start in a non-inductive mode according to the selected non-inductive starting mode.
4. A starting method of a dc brushless motor according to claim 3, characterized in that: the sensing mode in step S301 is started, and the MCU control device outputs a power driving signal to control the rotation of the dc brushless motor according to the position, speed and direction information of the rotor detected by the three hall sensors or any two hall sensors.
5. A starting method of a dc brushless motor according to claim 3, characterized in that: the three Hall sensors are respectively a Hall sensor A, a Hall sensor B and a Hall sensor C; the inductive starting mode in the step S301 comprises a first inductive starting mode in which the Hall sensor A, the Hall sensor B and the Hall sensor C are not invalid; a second inductive starting mode in which the Hall sensor A fails and the Hall sensor B and the Hall sensor C do not fail; a third inductive starting mode in which the Hall sensor B fails and neither the Hall sensor A nor the Hall sensor C fails; and a fourth inductive starting mode in which the Hall sensor C fails and the Hall sensor A and the Hall sensor B do not fail.
6. A starting method of a dc brushless motor according to claim 3, characterized in that: the non-inductive starting mode in step S302 is that the MCU control device outputs a power driving signal to the dc brushless motor and collects a back electromotive force signal generated by the rotation of the dc brushless motor, and the MCU control device calculates the rotor displacement according to the back electromotive force signal and correspondingly outputs a power driving signal to the dc brushless motor according to the rotor displacement information, so as to perform non-inductive starting of the dc brushless motor.
7. A starting method of a brushless dc motor according to claim 1, wherein: the MCU control device is internally provided with a program for calculating rotor displacement information according to the back electromotive force signal.
8. A starting method of a brushless dc motor according to claim 2, wherein: the Flash is arranged in the MCU control device.
9. A starting method of a brushless dc motor according to claim 1, wherein: the MCU control device is provided with a speed regulation input end for inputting a speed regulation instruction of the DC brushless motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110056802.4A CN112865620B (en) | 2021-01-15 | 2021-01-15 | Starting method of direct-current brushless motor |
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| CN202110056802.4A CN112865620B (en) | 2021-01-15 | 2021-01-15 | Starting method of direct-current brushless motor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101807879A (en) * | 2010-04-12 | 2010-08-18 | 中国科学院长春光学精密机械与物理研究所 | Miniature multifunctional motor driving controller |
| US20100327788A1 (en) * | 2009-06-30 | 2010-12-30 | Francois Laulanet | Method for starting a brushless sensorless dc motor |
| CN107947648A (en) * | 2017-12-19 | 2018-04-20 | 深圳市创科维信电子有限公司 | A kind of three-phase brushless motor drive circuit and its control method |
| CN110445428A (en) * | 2019-06-19 | 2019-11-12 | 南京信息职业技术学院 | A kind of phase change control method of brshless DC motor |
| US20200083824A1 (en) * | 2018-09-10 | 2020-03-12 | Tritan Technology Inc. | Fixed rotation direction start-up method for single-phase sensorless dc brushless motor |
-
2021
- 2021-01-15 CN CN202110056802.4A patent/CN112865620B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100327788A1 (en) * | 2009-06-30 | 2010-12-30 | Francois Laulanet | Method for starting a brushless sensorless dc motor |
| CN101807879A (en) * | 2010-04-12 | 2010-08-18 | 中国科学院长春光学精密机械与物理研究所 | Miniature multifunctional motor driving controller |
| CN107947648A (en) * | 2017-12-19 | 2018-04-20 | 深圳市创科维信电子有限公司 | A kind of three-phase brushless motor drive circuit and its control method |
| US20200083824A1 (en) * | 2018-09-10 | 2020-03-12 | Tritan Technology Inc. | Fixed rotation direction start-up method for single-phase sensorless dc brushless motor |
| CN110445428A (en) * | 2019-06-19 | 2019-11-12 | 南京信息职业技术学院 | A kind of phase change control method of brshless DC motor |
Non-Patent Citations (1)
| Title |
|---|
| 耿永 等: "一种基于BLDC电机的矢量控制电路设计", 《电子与封装》 * |
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Denomination of invention: A Starting Method for DC Brushless Motor Effective date of registration: 20230616 Granted publication date: 20230110 Pledgee: Science and Technology Branch of Torch Development Zone of Zhongshan Rural Commercial Bank Co.,Ltd. Pledgor: GUANGDONG HUILIPU INTELLIGENT TECHNOLOGY CO.,LTD. Registration number: Y2023980044273 |
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