CN106330019A - Starting method of brushless direct current motor - Google Patents
Starting method of brushless direct current motor Download PDFInfo
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- CN106330019A CN106330019A CN201510342038.1A CN201510342038A CN106330019A CN 106330019 A CN106330019 A CN 106330019A CN 201510342038 A CN201510342038 A CN 201510342038A CN 106330019 A CN106330019 A CN 106330019A
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Abstract
The invention provides a starting method of a brushless direct current motor. The starting method comprises the steps of (a) increasing starting voltage of the brushless direct current motor to first VSP starting voltage within a first time period; (b) increasing the starting voltage to second VSP starting voltage by taking the first VSP starting voltage as a starting point; (c) monitoring the rotating speed of the brushless direct current motor under the second VSP starting voltage, if the rotating speed is greater than or equal to a start threshold rotating speed, ending the method, and if the rotating speed is smaller than the start threshold rotating speed and the condition lasts for a second time period, entering the step (d); and (d) making the shutdown state of the brushless direct current motor last for a third time period, and then returning to the step (a). According to the starting method, the motor starting failure rate can be reduced and the starting efficiency is improved under the condition of shortening the motor starting time.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to a kind of brushless direct-current being used in air-conditioning
(BLDC) improvement of electric motor starting method.
Background technology
Along with the worsening shortages of current energy source, energy-saving and emission-reduction are the most increasingly paid attention to by the whole society.
The energy-conservation of air conditioning system occupies an important position in building energy conservation, air conditioning electricity in building electricity consumption
Account for significant proportion, particularly in some large public buildings, the power consumption of air conditioning system accounts for
The 40%～60% of total electricity consumption.In order to reach higher power conservation requirement, increasing air-conditioning system
System begins with and is easier to control, brshless DC motor more stable, in hgher efficiency comes for air-conditioning system
System provides power.Use the air conditioning system (including compressor, blower fan, water pump) of brshless DC motor
Speed governing is more steady, speed adjustable range is bigger, in hgher efficiency.Brshless DC motor can realize smooth tune
Speed, in speed regulation process, does not change the character of load in motor circuit, impacts electrical network
Little, more energy efficient.And, Speed Regulation Systems of BLDCM reliability is high, and dynamic property is good, is
Unite more stable.
But, in the application of brshless DC motor, motor because of in production process magnetizing equipment aging
Or it is bigger than normal that the reasons such as equipment replacement are easily caused rotor phase declinate degree, when adding startup
VSP (Voltage Speed) voltage increase rate is improper, is easy for starting unsuccessfully.And motor is originally
Body there is also the defect that phase contrast (one pole) angle is bigger than normal.
For drawbacks described above, the Starting mode that prior art typically uses such as the startup voltage in Fig. 1
Shown in the relation curve of VSP and time T: as shown in curve A, VSP voltage starts to open from 0V
Dynamic, use PID to control, when VSP voltage rises to electric motor starting region (near voltage Va),
Quickly through, voltage is quickly cross over Vc from Va.Finding from experimental observation, motor is in this case
Easily occur that shake always does not runs, then report electric motor starting failure fault.In prior art,
Motor is in the case of starting region the most normally starts, and VSP voltage can persistently rise, and goes up always
Rising peak, and also persistently to maintain a period of time just to report to the police, it departs from electric motor starting region really
After, the probability that motor gets up is the lowest, and namely this part-time is waste.Prior art
In, if motor cannot start for the first time, then complete machine meeting hard stop, needs to continue waiting for 3 minutes
Rear startup, and it is the highest to be again started up mortality.
Accordingly, it would be desirable to a kind of effective brshless DC motor starts method improves lacking of prior art
Fall into.
Summary of the invention
It is an object of the invention to provide a kind of method that brshless DC motor starts, it is possible to reducing
Starting efficiency is improved in the case of electric motor starting mortality, shortening motor starting time.
A kind of brshless DC motor according to the present invention starts method, comprises the steps:
A) brshless DC motor starts the VSP that voltage is increased within the cycle very first time open
Galvanic electricity pressure；
B) with a VSP startup voltage as starting point, described VSP startup voltage is increased to second
VSP starts voltage；
C) monitor described brshless DC motor and start the rotating speed under voltage at described 2nd VSP, if turning
Speed is more than or equal to starting threshold rotation rate, then this method terminates；If rotating speed is less than starting threshold value in real time
Rotating speed after the second time cycle, real-time rotating speed equal to or more than starting threshold rotation rate, then this
Method terminates, if after continuing for the second time cycle, real-time rotating speed is still less than starting threshold rotation rate, then
Enter step d；
D), after described brshless DC motor being shut down lasting 3rd time cycle, step a) is returned.
Preferably, the voltage in described step a raises and starts with first rate.
Preferably, first rate is 0.1V/S-5V/S.
Preferably, the voltage in described step b raises and starts with the second speed.
Preferably, described second speed is 0.1V/S-2V/S.
Preferably, the described cycle very first time is 0.1S-3.0S.
Preferably, described second time cycle is 0.1S-5.0S.
Preferably, described 3rd time cycle is 1s-10s.
Preferably, the voltage in described step a and step b is raised and is regulated by PID.
Preferably, described first magnitude of voltage is P=Vaa-Δ p, and wherein Vaa is that motor is recommended by the manufacturer
Start voltage minimum, Δ p=0.1-2V.
Should be appreciated that aforementioned description substantially is exemplary illustration with follow-up detailed description and conciliates
Release, the restriction of content claimed to the present invention should not be used as.
Accompanying drawing explanation
With reference to the accompanying drawing enclosed, the more purpose of the present invention, function and advantage will be real by the present invention
Execute the described below of mode to be illustrated, wherein:
Fig. 1 shows the operation principle schematic diagram that in prior art, brshless DC motor starts.
Fig. 2 a shows that the brshless DC motor of the present invention starts the flow chart of steps of method.
Fig. 2 b shows that the brshless DC motor of the present invention starts the graph of a relation of voltage and time.
Fig. 3 shows the schematic diagram of the PID regulation of the present invention.
Detailed description of the invention
By with reference to one exemplary embodiment, the purpose of the present invention and function and be used for realizing these mesh
And the method for function will be illustrated.But, the present invention is not limited to disclosed below showing
Exemplary embodiment；By multi-form, it can be realized.The essence of description is only
Help the detail of the various equivalent modifications Integrated Understanding present invention.
Hereinafter, embodiments of the invention will be described with reference to the drawings.In the accompanying drawings, identical attached
Figure labelling represents same or similar parts, or same or similar step.
Fig. 2 a shows that the brshless DC motor of the present invention starts the flow chart of steps of method.Fig. 2 b
Show that the brshless DC motor corresponding to Fig. 2 a method starts the graph of a relation of voltage and time.
As shown in Figure 2 a, start method according to the brshless DC motor of the present invention, comprise the steps:
In step 205, brshless DC motor is started voltage within the cycle very first time, is increased to first
VSP starts voltage.Specifically, as shown in Figure 2 b, from voltage VSP from 0V through the very first time
The VSP that cycle T 1 is increased to P point corresponding starts voltage.
After unit receives electric motor starting instruction, export rotating speed of target, simultaneously controller according to logic
Quickly imparting VSP the oneth VSP startup voltage P is to motor, and the actual speed of Real-time Feedback motor.
According to one embodiment of present invention, described voltage raises is to be increased to first with first rate
VSP starts voltage.Preferably, first rate is 1V/S, first rate can choose in the range of
0.1-5.0V/S。
Preferably, the above-mentioned cycle very first time is 1.8S.
Preferably, the determination method of a VSP startup voltage is as follows: a VSP starts magnitude of voltage
P is:
P=Vaa-Δ p (1)
Wherein Vaa is the startup voltage minimum that motor is recommended by the manufacturer, starts voltage during this magnitude of voltage
Minima, Δ p=0.1-2V.
In step 210, with a VSP startup voltage P as starting point, described startup voltage is raised
Voltage is started to the 2nd VSP.Preferably, as shown in Figure 2 b, after starting voltage arrival P point,
Start slowly to boost with the second certain speed K, start voltage to arrive.
Preferably, the value of the second speed is 0.1V/S-2V/S.
Preferably, from the oneth VSP start voltage be increased to the 2nd VSP start voltage need second time
Between time in cycle.Preferably, described second time cycle is 3 seconds.
Optionally, in addition to starting with constant rate of speed, it would however also be possible to employ the speed persistently changed reaches
2nd VSP starts voltage.
In step 215, monitor described brshless DC motor and start under voltage at described 2nd VSP
Rotating speed.
In a step 220, the startup threshold value of the real-time rotating speed monitored with brshless DC motor is turned
Speed compares, if rotating speed is more than or equal to starting threshold rotation rate, such as N=25-300r/min, then
Entering step 225, start successfully, this method terminates；If rotating speed is less than starting threshold rotation rate in real time,
And after the second time cycle, real-time rotating speed equals to or more than N=25-300r/min, then this method
Terminate, if after continuing for the second time cycle, real-time rotating speed still less than N=25-300r/min, is then said
Bright startup voltage now not up to be enough to the threshold value enabling motor to start, and starts unsuccessfully, then sentences
Power machine starts unsuccessful, then enter step 230；
Wherein, N=25-300r/min, is a span, for a BLDC motor, its
Threshold rotation rate N is fixed value.
In step 230, described brshless DC motor is shut down after continuing for the 3rd time cycle, return step
Rapid 205, re-start startup.Preferably, the 3rd time cycle was 1s-10s.
Concrete, according to the electric motor starting method of the present invention, there is intelligent starting detection function, work as intelligence
Can start detection judge motor first time start unsuccessfully after (i.e. step 215 is judged as NO), stop immediately
In one period of cycle of machine, again start according to above-mentioned steps.Repeated priming method according to the invention described above,
If if last time, motor cannot start, it may appear that motor vibrating phenomenon, by shutting down week a period of time
Phase starts shooting again, utilizes the inertia force pushing motor that last time, motor vibrating produced to operate, the most again
Again substantially increase the success rate of electric motor starting, it is thus possible to preferably reduce electric motor starting mortality.
Preferably, according to the electric motor starting method of the present invention, voltage is increased to a VSP and starts electricity
It is passing ratio-Integrated Derivative method (PID) regulation that pressure and the 2nd VSP start the process of voltage
's.
As it is shown on figure 3, the publicity of the PID that voltage raises is as follows in regulation above-described embodiment:
Wherein, KPRepresent proportionality coefficient, TIRepresent the time of integration, TDRepresent derivative time, e (t)
Represent error amount.
The advantage of the voltage starting method according to the present invention is:
1. using K-P to start to control, VSP rate of voltage rise is the slowest and smooth,
And in prior art, the rate of climb of VSP voltage is too fast, observe from result of the test, according to this
Bright K-P starts control can be greatly improved startup success rate.
2. the startup method according to the present invention can more clearly know the operating feelings in electric motor starting stage
Condition, the failure of feedback electric motor starting, saves motor starting time in time, improves starting efficiency.
3. the present invention uses repeated priming, can preferably reduce electric motor starting mortality.
In conjunction with explanation and the practice of the present invention disclosed here, other embodiments of the present invention are for this
Skilled person is easy to expect and understand.Illustrate and embodiment is to be considered only as exemplary
, true scope and the purport of the present invention are all defined in the claims.
Claims (10)
1. brshless DC motor starts a method, comprises the steps:
A) first that brshless DC motor VSP startup voltage was increased within the cycle very first time
VSP starts voltage；
B) with a VSP startup voltage as starting point, described VSP startup voltage is increased to second
VSP starts voltage；
C) monitor described brshless DC motor and start the real-time rotating speed under voltage at described 2nd VSP,
If rotating speed is more than or equal to starting threshold rotation rate in real time, then this method terminates；
If rotating speed is less than starting threshold rotation rate and after the second time cycle in real time, real-time rotating speed etc.
In or more than starting threshold rotation rate, then this method terminates, if continuing after the second time cycle, in real time
Rotating speed still less than starting threshold rotation rate, then enters step d；
D) described brshless DC motor is shut down, after continuing for the 3rd time cycle, return step a).
Method the most according to claim 1, the VSP in wherein said step a starts voltage
Rising starts with first rate.
Method the most according to claim 2, wherein first rate is 0.1V/S-5V/S.
Method the most according to claim 1, the VSP in wherein said step b starts voltage
Rising starts with the second speed.
Method the most according to claim 4, wherein said second speed is 0.1V/S-2V/S.
Method the most according to claim 1, the wherein said cycle very first time is 0.1S-3.0S.
Method the most according to claim 1, wherein said second time cycle is 0.1S-5.0S.
Method the most according to claim 1, wherein said 3rd time cycle is 1s-10s.
Method the most according to claim 1, the VSP in wherein said step a and step b
Start voltage rising to be regulated by PID.
Method the most according to claim 1, a wherein said VSP starts magnitude of voltage and is
P=Vaa-Δ p, wherein Vaa is the startup voltage minimum that motor is recommended by the manufacturer, Δ p=0.1-2V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342038.1A CN106330019A (en) | 2015-06-18 | 2015-06-18 | Starting method of brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510342038.1A CN106330019A (en) | 2015-06-18 | 2015-06-18 | Starting method of brushless direct current motor |
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| CN106330019A true CN106330019A (en) | 2017-01-11 |
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ID=57733366
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| CN201510342038.1A Pending CN106330019A (en) | 2015-06-18 | 2015-06-18 | Starting method of brushless direct current motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108900115A (en) * | 2018-08-24 | 2018-11-27 | 国家电网有限公司 | Water-storage static frequency changer self-adaptive current control method |
| CN109708265A (en) * | 2018-12-20 | 2019-05-03 | 海信（山东）空调有限公司 | The starting method and outdoor unit of blower in a kind of outdoor unit |
| WO2021129212A1 (en) * | 2019-12-24 | 2021-07-01 | 追觅科技(上海)有限公司 | Motor starting method, motor brake control method, device and electrical equipment |
| CN117498723A (en) * | 2023-12-29 | 2024-02-02 | 成都维客昕微电子有限公司 | Motor vibration start-stop control method based on voltage sequence |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900115A (en) * | 2018-08-24 | 2018-11-27 | 国家电网有限公司 | Water-storage static frequency changer self-adaptive current control method |
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| CN109708265A (en) * | 2018-12-20 | 2019-05-03 | 海信（山东）空调有限公司 | The starting method and outdoor unit of blower in a kind of outdoor unit |
| WO2021129212A1 (en) * | 2019-12-24 | 2021-07-01 | 追觅科技(上海)有限公司 | Motor starting method, motor brake control method, device and electrical equipment |
| CN117498723A (en) * | 2023-12-29 | 2024-02-02 | 成都维客昕微电子有限公司 | Motor vibration start-stop control method based on voltage sequence |
| CN117498723B (en) * | 2023-12-29 | 2024-03-12 | 成都维客昕微电子有限公司 | Motor vibration start-stop control method based on voltage sequence |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Tokyo, Japan Applicant after: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, Inc. Address before: Tokyo, Japan Applicant before: Hitachi Johnson Automatic Air Conditioning Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181218 Address after: Tokyo, Japan Applicant after: Hitachi Johnson Automatic Air Conditioning Co.,Ltd. Address before: 511685 Xuetian Management Zone, Longshan Town, Fogang County, Qingyuan City, Guangdong Province Applicant before: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. Effective date of registration: 20181218 Address after: Longtian Town, Fogang County, Qingyuan, Guangdong Applicant after: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. Address before: 511685 Xuetian Management Zone, Longshan Town, Fogang County, Qingyuan City, Guangdong Province Applicant before: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. Applicant before: JOHNSON CONTROLS TECHNOLOGY Co. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
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| RJ01 | Rejection of invention patent application after publication |