CN105743399B - A kind of D-C brushless electric machine no-position control system and its control method - Google Patents
A kind of D-C brushless electric machine no-position control system and its control method Download PDFInfo
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- CN105743399B CN105743399B CN201610322297.2A CN201610322297A CN105743399B CN 105743399 B CN105743399 B CN 105743399B CN 201610322297 A CN201610322297 A CN 201610322297A CN 105743399 B CN105743399 B CN 105743399B
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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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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to motor control technology fields, and in particular to a kind of D-C brushless electric machine no-position control system and its control method, the present invention include：With the sequentially connected controller of current signal, driving circuit, power circuitry module, current detection module, motor and counter electromotive force detection module, the counter electromotive force detection module is connect with controller, and device provides back-emf signal in order to control；The current detection module is connect with controller, and device provides current signal in order to control, and controller controls driving circuit to control motor speed according to current signal；And by back-emf signal it can be seen that the rotor-position of motor, motor speed is obtained by current signal；It is monitored and controls to the operating status of motor during the present invention solves the problem of the position-sensorless control of single-phase DC brushless motor, and its circuit structure and the process of control are relatively simple, conducive to being promoted on the market.
Description
Technical field
The present invention relates to motor control technology fields, and in particular to a kind of D-C brushless electric machine no-position control system and one
Control method of the kind for D-C brushless electric machine no-position control system.
Background technology
In existing driving control system for electric machine, single-phase DC brushless motor is controlled by position sensor
Whole system, and have position sensing control mode increase cost, it is high to the sensitivity requirement of Hall sensor, to Hall pass
The position installation requirement of sensor is also higher, whole system structure is sufficiently complex；Monitoring for high rotating speed and invariable power, tool
Have and increases great difficulty.Therefore, in Motor Control Field, the control mode of position-sensor-free is existing mainstream research side
Method, and since position sensor control can detect the rotating speed of motor operation by Hall sensor, and position-sensorless control side
Formula is not no Hall sensor, therefore it is problem in the urgent need to address to the monitoring running state of motor and control.
Invention content
To overcome drawbacks described above, the purpose of the present invention be to provide a kind of D-C brushless electric machine no-position control system and
Its control method.
The purpose of the present invention is achieved through the following technical solutions：
The present invention is a kind of D-C brushless electric machine no-position control system and its control method, including：Controller, the control
It is connected to driving circuit on device processed；
Power circuitry module is connected on the driving circuit, the driving circuit is for the control transmitted by controller
Order, generates corresponding drive signal, and the drive signal is sent in power circuitry module；
Bridge portion and lower bridge portion, the upper bridge portion and motor phase line are respectively equipped in the power circuitry module
First, second end is separately connected, and the lower bridge portion and the first, second end of motor phase line are separately connected, make bridge portion with
Motor phase line first end joint constitutes the first access between lower bridge portion and motor phase line second end joint；And upper bridge portion
Divide and motor phase line second end joint constitutes alternate path between lower bridge portion and motor phase line first end joint；It is described
Power circuitry module controls motor by upper bridge portion and lower bridge portion according to drive signal；
Counter electromotive force detection module and current detection module are connected separately on the motor, the counter electromotive force detects mould
Block is connected with controller, and the counter electromotive force detection module is for adopting generated back-emf signal on motor
Collection, and its back-emf signal is sent to the controller；
The current detection module is set between the motor and the power circuitry module, is used for for passing through electricity
Electric current on machine is acquired, and obtains current signal, and the current signal is sent in controller；
The controller determines the rotor position information of motor according to back-emf signal is received, and according to received
Current signal, after modifying to control command to driving circuit send.
Further, the upper bridge portion is attached with battery module, and the battery module is that the upper bridge is powered,
Power conversion module is further connected on the battery module, the power conversion module is described to being adjusted by its voltage
Power conversion module is connect with the lower bridge portion, is used to be powered for lower bridge portion.
Further, temperature detecting module, the temperature detecting module are equipped between the controller and power circuitry module
Temperature for monitoring power circuitry module obtains temperature data, and the temperature data is sent in controller.
Further, voltage detection module, the voltage detection module are equipped between the controller and power conversion module
For monitoring the voltage value in power supply conversion module, voltage data is obtained, and the voltage data is sent in controller.
Further, display module and key circuit detection module are connected on the controller；
The display module is for showing the information on controller；
The key circuit detection module is used for controller input control information.
A kind of control method for D-C brushless electric machine no-position control system as described above of the invention, including：
Controller sends instantaneous control command to driving circuit, and driving circuit controls power circuit mould according to control command
First access in the block judges motor instantaneously by drive signal, and while the first access instantaneously passes through drive signal
Whether rotor rotates；
When the rotor of motor does not rotate, controller sends continuous control command, driving electricity to driving circuit
Road controls the first, second access in power circuitry module according to control command and passes sequentially through drive signal, logical first, second
While road passes sequentially through drive signal, the rotor of motor is rotated according to drive signal, counter electromotive force detection module to because
The rotation of rotor and the back-emf signal that generates is acquired, whether controller to receiving back-emf signal and carrying out
Judge；
After controller receives back-emf signal, control command is adjusted so that motor with maximum power into
Row Accelerating running, after motor Accelerating running is to scheduled duration, control the upper and lower bridge portion of power circuitry module respectively with electricity
Machine phase line disconnects；
After the upper and lower bridge portion of control power circuitry module is disconnected with motor phase line respectively, controller is according to this
When back-emf signal identify the position of rotor；
After identifying the position of rotor, controller adjusts control command so that the upper bridge portion of the first access
The duty ratio of input drive signal is adjusted to maximum value, and after scheduled duration, accounting for for input drive signal is reduced with fixed step size
Empty ratio, until the duty ratio of its input drive signal is minimum；
While driving circuit controls the upper bridge portion of the first access with maximum duty cycle input drive signal, by second
The duty ratio of the input drive signal of the lower bridge portion of access is adjusted to minimum, after scheduled duration, is improved with fixed step size
The duty ratio of input drive signal, until the duty ratio of its input drive signal is maximum value；
The duty ratio of bridge portion input drive signal is that bridge portion inputs under minimum and alternate path on the first access
The duty ratio of drive signal be maximum value after, again control power circuitry module upper and lower bridge portion respectively with motor phase line
It disconnects.
Further, include after whether the rotor for judging motor rotates：
When the rotor of motor rotates, controller sends instantaneous control command to driving circuit again.
Further, it is described make motor with maximum power carry out Accelerating running further include：
Current detection module will detect that current signal is converted to voltage letter to being detected by the electric current of motor
Number, controller is adjusted control command according to voltage signal.
During the present invention solves the position-sensorless control of single-phase DC brushless motor, the operating status of motor is supervised
The problem of surveying with control, and its circuit structure and control process are relatively simple, conducive to being promoted on the market.
Description of the drawings
The present invention is described in detail by following preferred embodiments and attached drawing for ease of explanation,.
Fig. 1 is the circuit logic structural schematic diagram of control system of the present invention；
Fig. 2 is the workflow schematic diagram of control method of the present invention；
Fig. 3 is the current signal and drive signal waveform figure of control method of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Referring to Fig. 1, the present invention is a kind of D-C brushless electric machine no-position control system comprising：
Controller 1 is connected to driving circuit 2 on the controller 1；
Power circuitry module 3 is connected on the driving circuit 2, the driving circuit 2 is used for according to transmitted by controller 1
Control command generates corresponding drive signal, and the drive signal is sent in power circuitry module 3；
Bridge portion and lower bridge portion, the upper bridge portion and motor phase line are respectively equipped in the power circuitry module 3
The first, second end be separately connected, the lower bridge portion and the first, second end of motor phase line are separately connected, and make bridge portion
The first access is constituted between motor phase line first end joint to lower bridge portion and motor phase line second end joint；And upper bridge
Part and motor phase line second end joint constitute alternate path between lower bridge portion and motor phase line first end joint；Institute
Power circuitry module 3 is stated according to drive signal, motor is controlled by upper bridge portion and lower bridge portion；Power circuitry module
Mode is drivingly connected using H bridges between 3 and motor, bridge portion is connected with motor U phases, V respectively thereon, lower bridge portion difference
It is connected with motor U phases, V；Bridge constitutes the first access with bridge under V phases in U phases, and bridge constitutes alternate path with bridge under U phases in V phases；
Counter electromotive force detection module 7 and current detection module 6, the counter electromotive force inspection are connected separately on the motor 12
It surveys module 7 with controller 1 to be connected, the counter electromotive force detection module 7 is used to believe generated counter electromotive force on motor 12
It number is acquired, and its back-emf signal is sent to the controller 1；Counter electromotive force detection module 7 refer to U phase voltages and
V phase voltages obtain the number of analog quantity by subtracter, obtain the numerical value for being less than supply voltage using electric resistance partial pressure, so
Afterwards by two channel analog switches, finally the numerical value is made comparisons with the DA values that controller 1 is set, it is read by controller 1
Level state detects counter electromotive force zero passage.
The current detection module 6 is set between the motor 12 and the power circuitry module 3, is used for for logical
The electric current crossed on motor 12 is acquired, and obtains current signal, and the current signal is sent in controller 1；
The controller 1 determines the rotor position information of motor 12 according to back-emf signal is received, and according to being connect
The current signal received is sent after modifying to control command to driving circuit 2.Counter electromotive force received by controller 1
The signal reaction rotor position information of motor 12, current signal have reacted the rotary speed information of motor 12, when current signal mistake
Height illustrates that 12 rotating speed of motor is too fast, and controller 1 controls driving circuit 2, makes the reduction of its rotating speed；When current signal is too low, illustrate electricity
12 rotating speed of machine is excessively slow, and controller 1 controls driving circuit 2, makes its faster rotational speed.
Further, the upper bridge portion is attached with battery module 4, and the battery module 4 is that the upper bridge is supplied
Electricity is further connected with power conversion module 5 on the battery module 4, and the power conversion module 5 by its voltage to being adjusted
Whole, the power conversion module 5 is connect with the lower bridge portion, is used to be powered for lower bridge portion.Wherein, the battery
Module 4 is lithium battery.
Further, temperature detecting module 8, the temperature detection mould are equipped between the controller 1 and power circuitry module 3
Block 8 is used to monitor the temperature of power circuitry module 3, obtains temperature data, and the temperature data is sent in controller 1.Such as
Fruit temperature is higher than preset value, and all signals are switched off by the controller 1；
Further, voltage detection module 11, the voltage detecting are equipped between the controller 1 and power conversion module 5
Module 11 is used to monitor the voltage value in power supply conversion module 5, obtains voltage data, and the voltage data is sent to control
In device 1 processed, when voltage data exceeds preset range, then 1 control circuit of controller disconnects, and avoids excessively high voltage to circuit devcie
It damages.
Further, display module 9 and key circuit detection module 10 are connected on the controller 1；
The display module 9 is for showing the information on controller 1；
The key circuit detection module 10 is used to, to 1 input control information of controller, pass through key circuit detection module
10 can carry out control adjustment to controller 1.
Please refer to Fig. 2 and Fig. 3, a kind of control for D-C brushless electric machine no-position control system as described above of the invention
Method processed, including：
201. pre-determined bit
Controller sends instantaneous control command to driving circuit, and driving circuit controls power circuit mould according to control command
First access in the block judges motor instantaneously by drive signal, and while the first access instantaneously passes through drive signal
Whether rotor rotates；
In order to determine the position of rotor, the initial position of the rotor needed is determined, therefore needs to turn electronics
Son is pre-positioned, i.e., electronics rotor is attracted into scheduled position, by repeatedly inputting instantaneous drive in the first access
Dynamic signal is pre-positioned to realize, while the first access instantaneously passes through drive signal, if the rotor of electronics rotates, and card
Bright rotor, which is not yet attracted, arrives precalculated position, and controller sends instantaneous control command to driving circuit again, and again to the
One access inputs instantaneous drive signal；If the rotor of electronics does not rotate, prove that rotor has arrived at precalculated position.
202. position detection
When the rotor of motor does not rotate, controller sends continuous control command, driving electricity to driving circuit
Road controls the first, second access in power circuitry module according to control command and passes sequentially through drive signal, logical first, second
While road passes sequentially through drive signal, the rotor of motor is rotated according to drive signal, counter electromotive force detection module to because
The rotation of rotor and the back-emf signal that generates is acquired, whether controller to receiving back-emf signal and carrying out
Judge；The operation of motor will produce back-emf signal, can be risen by back-emf signal and rotor-position is accurately positioned,
So that motor each run can be accurately detected rotor-position.
203. speed are drawn high
After controller receives back-emf signal, control command is adjusted so that drive signal is accounted for maximum
The form of empty ratio is input in power circuitry module so that motor carries out Accelerating running with maximum power, in motor with maximum work
Rate carries out Accelerating running simultaneously, and current detection module will detect that current signal turns to being detected by the electric current of motor
It is changed to voltage signal, controller is adjusted control command according to voltage signal；When motor Accelerating running to scheduled duration
Afterwards, the upper and lower bridge portion for controlling power circuitry module is disconnected with motor phase line respectively；
204. steady-state operation
After the upper and lower bridge portion of control power circuitry module is disconnected with motor phase line respectively, controller is according to this
When back-emf signal identify the position of rotor；
After identifying the position of rotor, controller adjusts control command so that the upper bridge portion of the first access
The duty ratio of input drive signal is adjusted to maximum value, and after scheduled duration, accounting for for input drive signal is reduced with fixed step size
Empty ratio, until the duty ratio of its input drive signal is minimum；
While driving circuit controls the upper bridge portion of the first access with maximum duty cycle input drive signal, by second
The duty ratio of the input drive signal of the lower bridge portion of access is adjusted to minimum, after scheduled duration, is improved with fixed step size
The duty ratio of input drive signal, until the duty ratio of its input drive signal is maximum value；
The duty ratio of bridge portion input drive signal is that bridge portion inputs under minimum and alternate path on the first access
The duty ratio of drive signal be maximum value after, again control power circuitry module upper and lower bridge portion respectively with motor phase line
It disconnects；
The control method of steady-state operation is described with a specific example below, first by all upper and lower bridge portions
It is all off, bridge in U phases is then opened with 100% duty ratio again, over time, then with 5% duty ratio reduction, until
Bridge turns off in U phases；Meanwhile bridge is first turned off a period of time under U phases, is then increased again with 5% duty ratio, until reaching 100%
Until duty ratio；At the same time, bridge is also always on leading under V phases；Bridge duty ratio reaches maximum under bridge shutdown or U phases in U phases
Afterwards, again that all upper and lower bridge portions are all off, above-mentioned flow is repeated again.
Under the normal operating condition of motor, it can be run with the pattern of steady-state operation, in steady state operation, electricity
Current signal and back-emf signal that detection module and counter electromotive force detection module detect always motor respectively are flowed, electric current is passed through
Signal and back-emf signal can respectively obtain the rotating speed and rotor-position of motor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (3)
1. a kind of control method for D-C brushless electric machine no-position control system, which is characterized in that including：Brush DC electricity
Machine position-sensorless control system；
The D-C brushless electric machine no-position control system includes：
Controller is connected to driving circuit on the controller；
Power circuitry module is connected on the driving circuit, the driving circuit is for the control life transmitted by controller
It enables, generates corresponding drive signal, and the drive signal is sent in power circuitry module；
It is respectively equipped with bridge portion and lower bridge portion in the power circuitry module, the of the upper bridge portion and motor phase line
One, second end is separately connected, and the lower bridge portion and the first, second end of motor phase line are separately connected, and makes bridge portion and electricity
Machine phase line first end joint constitutes the first access between lower bridge portion and motor phase line second end joint；And upper bridge portion
Alternate path is constituted between motor phase line second end joint to lower bridge portion and motor phase line first end joint；The work(
Rate circuit module controls motor by upper bridge portion and lower bridge portion according to drive signal；
Be connected separately with counter electromotive force detection module and current detection module on the motor, the counter electromotive force detection module with
Controller is connected, and the counter electromotive force detection module is used to be acquired generated back-emf signal on motor, and
Its back-emf signal is sent to the controller；
The current detection module is set between the motor and the power circuitry module, is used for for by motor
Electric current be acquired, obtain current signal, and the current signal is sent in controller；
The controller determines the rotor position information of motor according to back-emf signal is received, and according to received electricity
Signal is flowed, is sent to driving circuit after modifying to control command；
The control method of the D-C brushless electric machine no-position control system includes：
Controller sends instantaneous control command to driving circuit, and driving circuit is controlled according to control command in power circuitry module
The first access instantaneously by drive signal, and while the first access instantaneously passes through drive signal, judge the rotor of motor
Whether rotate；
When the rotor of motor does not rotate, controller sends continuous control command, driving circuit root to driving circuit
According to control command control power circuitry module in the first, second access pass sequentially through drive signal, the first, second access according to
Secondary while pass through drive signal, the rotor of motor is rotated according to drive signal, and counter electromotive force detection module is to because of motor
The rotation of rotor and the back-emf signal that generates are acquired, and whether controller is to receiving back-emf signal and sentencing
It is disconnected；
After controller receives back-emf signal, control command is adjusted so that motor is added with maximum power
Speed operation, after motor Accelerating running is to scheduled duration, control the upper and lower bridge portion of power circuitry module respectively with motor phase
Line disconnects；
After the upper and lower bridge portion of control power circuitry module is respectively disconnected with motor phase line, controller is according at this time
Back-emf signal identifies the position of rotor；
After identifying the position of rotor, controller adjusts control command so that the input of the upper bridge portion of the first access
The duty ratio of drive signal is adjusted to maximum value, and after scheduled duration, the duty ratio of input drive signal is reduced with fixed step size,
Until the duty ratio of its input drive signal is minimum；
While driving circuit controls the upper bridge portion of the first access with maximum duty cycle input drive signal, by alternate path
The duty ratio of input drive signal of lower bridge portion be adjusted to minimum, after scheduled duration, improved and inputted with fixed step size
The duty ratio of drive signal, until the duty ratio of its input drive signal is maximum value；
The duty ratio of bridge portion input drive signal is bridge portion input driving under minimum and alternate path on the first access
The duty ratio of signal is disconnected with motor phase line respectively after maximum value, to control the upper and lower bridge portion of power circuitry module again
Connection.
2. control method according to claim 1, which is characterized in that whether the rotor for judging motor rotates it
After include：
When the rotor of motor rotates, controller sends instantaneous control command to driving circuit again.
3. control method according to claim 2, which is characterized in that described that motor is made to carry out Accelerating running with maximum power
Further include：
Current detection module will detect that current signal is converted to voltage signal to being detected by the electric current of motor, control
Device processed is adjusted control command according to voltage signal.
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| CN201610322297.2A CN105743399B (en) | 2016-05-13 | 2016-05-13 | A kind of D-C brushless electric machine no-position control system and its control method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026805A (en) * | 2016-07-14 | 2016-10-12 | 深圳市高科润电子有限公司 | Single-phase sensorless brushless DC motor control system |
| CN106160596A (en) * | 2016-07-14 | 2016-11-23 | 深圳市高科润电子有限公司 | A kind of startup method of the single-phase DC brushless motor of position-sensor-free |
| CN106026802A (en) * | 2016-07-14 | 2016-10-12 | 深圳市高科润电子有限公司 | Rotor position detection system for single-phase DC brushless motor |
| CN106208840A (en) * | 2016-08-29 | 2016-12-07 | 杭州士腾科技有限公司 | Control system and control method |
| CN106411194A (en) * | 2016-10-19 | 2017-02-15 | 深圳市高科润电子有限公司 | No-position permanent magnet brushless direct current motor control device and control method thereof |
| CN108964558B (en) * | 2017-05-24 | 2021-04-06 | 浙江三花智能控制股份有限公司 | Motor control method and motor control system |
| CN107414196A (en) * | 2017-08-25 | 2017-12-01 | 太仓贝斯特机械设备有限公司 | A kind of intelligent peeling machine control system |
| CN111075738B (en) * | 2019-12-05 | 2021-06-01 | 上海英恒电子有限公司 | Brushless motor-based fan starting control method and control device |
| CN111541406A (en) * | 2020-04-01 | 2020-08-14 | 华帝股份有限公司 | Control method of brushless direct current motor control system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3832257B2 (en) * | 2001-02-26 | 2006-10-11 | 株式会社日立製作所 | Synchronous motor start control method and control device |
| CN201022185Y (en) * | 2006-12-15 | 2008-02-13 | 比亚迪股份有限公司 | Electromotor controller |
| CN101242154B (en) * | 2008-03-14 | 2010-04-14 | 重庆大学 | A built-in permanent magnetic brushless DC motor control system for no position sensor |
| CN101534087A (en) * | 2009-04-13 | 2009-09-16 | 浙江大学 | Method for detecting position of rotor in lower-speed state of brushless dc motor without position sensing device |
| CN101860310A (en) * | 2010-06-07 | 2010-10-13 | 苏州能健电气有限公司 | Drive control circuit and method of series DC machine for pitch control system |
| CN104467551B (en) * | 2014-11-10 | 2017-11-07 | 常州格力博有限公司 | One kind is without hall electric machine smooth starting method |
| CN205123636U (en) * | 2015-08-06 | 2016-03-30 | 英特格灵芯片(天津)有限公司 | Brushless motor does not have position sensor controlling means |
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