CN109245654A - The starting control method and device of DC fan, outdoor unit, air conditioner - Google Patents

The starting control method and device of DC fan, outdoor unit, air conditioner Download PDF

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Publication number
CN109245654A
CN109245654A CN201811115566.3A CN201811115566A CN109245654A CN 109245654 A CN109245654 A CN 109245654A CN 201811115566 A CN201811115566 A CN 201811115566A CN 109245654 A CN109245654 A CN 109245654A
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China
Prior art keywords
fan
threshold value
current
speed threshold
initial velocity
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Granted
Application number
CN201811115566.3A
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Chinese (zh)
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CN109245654B (en
Inventor
黄招彬
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201811115566.3A priority Critical patent/CN109245654B/en
Publication of CN109245654A publication Critical patent/CN109245654A/en
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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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/34—Arrangements for starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • H02P21/0021—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control using different modes of control depending on a parameter, e.g. the speed
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
    • 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The invention discloses starting control method and device, outdoor unit and the air conditioners of a kind of DC fan.Starting control method includes: to be injected based on no-voltage, obtains the three-phase current of DC fan and determines initial velocity and the direction of rotation of DC fan；Determine the initial velocity of DC fan and the relationship of pre-set velocity threshold value；According to the relationship of the initial velocity of DC fan and pre-set velocity threshold value, controls DC fan and enter different start-up modes.The starting control method of the DC fan of above embodiment is injected the initial velocity of estimation DC fan based on no-voltage, initial velocity and direction of rotation can be calculated according to the three-phase current of DC fan, above-mentioned control method is fairly simple, easy to accomplish.Further, and according to different initial velocity control DC fans enter different start-up modes, starting success rate of the DC fan at weather anomaly (blowing and raining) can be improved, reduce failure exception, improve user experience.

Description

The starting control method and device of DC fan, outdoor unit, air conditioner
Technical field
The present invention relates to motor control technology field, in particular to the starting control method and device of a kind of DC fan, Outdoor unit, air conditioner.
Background technique
In the related art, DC fan is used widely because of its high efficiency in many electric equipment products, such as frequency conversion Outdoor unit blower in air-conditioning.In the application of air conditioner, due to wind and rain weather and typhoon weather etc., outdoor unit DC fan is normal Often work the situation being not zero in initial velocity, that is, requires DC fan that can have certain initial velocity (rotate forward or invert with the wind against the wind) In the case where carry out starting operation.But under air conditioner position Sensorless Control application, when DC fan has centainly DC fan starting failure is easily lead in the case where initial velocity, influences air-conditioning system work.
Summary of the invention
Embodiments of the present invention provide a kind of starting control method and device of DC fan, outdoor unit, air conditioner.
The starting control method of the DC fan of embodiment of the present invention, comprising:
It is injected based on no-voltage, obtains the three-phase current of the DC fan and according to the three-phase current of the DC fan Determine initial velocity and the direction of rotation of the DC fan；
Determine the initial velocity of the DC fan and the relationship of pre-set velocity threshold value；
According to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value, control the DC fan into Enter different start-up modes.
The starting control method of the DC fan of above embodiment injects the first of estimation DC fan based on no-voltage Speed can calculate initial velocity and direction of rotation according to the three-phase current of DC fan, and above-mentioned control method is fairly simple, holds Easily realize.Further, and according to different initial velocity control DC fans enter different start-up modes, direct current can be improved Starting success rate of the blower at weather anomaly (blowing and raining) reduces failure exception, improves user experience.
In some embodiments, the pre-set velocity threshold value includes First Speed threshold value, according to the DC fan The relationship of initial velocity and the pre-set velocity threshold value controls the DC fan and enters different start-up modes, comprising: works as institute When stating initial velocity greater than the First Speed threshold value, the DC fan is controlled into direct closed-loop start-up mode；Wherein, institute Stating First Speed threshold value is positive number.
In some embodiments, the pre-set velocity threshold value includes second speed threshold value, according to the DC fan The relationship of initial velocity and the pre-set velocity threshold value controls the DC fan and enters different start-up modes, comprising: works as institute Initial velocity is stated greater than the second speed threshold value and when being not more than the First Speed threshold value, the DC fan is controlled and enters Dynamic braking start-up mode；Wherein, the First Speed threshold value > second speed threshold value, the second speed threshold value are positive Number.
In some embodiments, the pre-set velocity threshold value includes third speed threshold value, according to the DC fan The relationship of initial velocity and the pre-set velocity threshold value controls the DC fan and enters different start-up modes, comprising: works as institute Initial velocity is stated greater than the third speed threshold value and when being not more than the second speed threshold value, the DC fan is controlled and enters Normal positioning starting mode；Wherein, the second speed threshold value > third speed threshold value, the third speed threshold value are negative Number.
In some embodiments, the pre-set velocity threshold value includes fourth speed threshold value, according to the DC fan The relationship of initial velocity and the pre-set velocity threshold value controls the DC fan and enters different start-up modes, comprising: works as institute Initial velocity is stated greater than the fourth speed threshold value and when being not more than the third speed threshold value, the DC fan is controlled and enters The dynamic braking start-up mode；When the initial velocity is not more than the fourth speed threshold value, the direct current is detected again The initial velocity of blower, and control the DC fan and be waited for；Wherein, the third speed threshold value > described 4th Threshold speed；The fourth speed threshold value is negative.
In some embodiments, the starting control method includes: when the DC fan is opened in the normal positioning When dynamic model formula, the position fixing process that the DC fan is injected through overcurrent is first controlled, then controls the DC fan and enters open loop Operation, in open loop operation, after the current rotating speed of the DC fan reaches switch speed threshold value, controls the DC fan Into operation with closed ring；When the DC fan is in the dynamic braking start-up mode, the DC fan is first controlled by energy The process for consuming braking, then controls the DC fan and enters open loop operation, current when the DC fan in open loop operation After revolving speed reaches the switch speed threshold value, controls the DC fan and enter operation with closed ring；When the DC fan is described When direct closed-loop start-up mode, controls the DC fan and enter operation with closed ring.
In some embodiments, it is injected based on no-voltage, obtains the three-phase current of the DC fan and according to described The three-phase current of DC fan determines initial velocity and the direction of rotation of the DC fan, comprising: is injected, is obtained based on no-voltage Take the three-phase current of the DC fan, and according to the three-phase current of the DC fan under two-phase stationary coordinate system electric current mistake At the time of zero point and current signal symbol determines initial velocity and the direction of rotation of the DC fan.
In some embodiments, it is injected based on no-voltage, obtains the three-phase current of the DC fan, and according to described The three-phase current of DC fan under two-phase stationary coordinate system at the time of current zero-crossing point and current signal symbol determine it is described straight The initial velocity of flow fan and direction of rotation, comprising: obtain the three-phase current of DC fan when no-voltage injection；By institute It states three-phase current and transforms to and obtain the first electric current and the second electric current under the two-phase stationary coordinate system；According to first electric current and Second electric current calculates initial velocity and the direction of rotation of the DC fan.
In some embodiments, the initial of the DC fan is calculated according to first electric current and second electric current Speed and direction of rotation, comprising: according to difference at the time of the adjacent zero crossing twice of first electric current and second electric current Calculate the initial velocity of the DC fan, and the symbol according to first electric current and second electric current in zero-acrross ing moment Determine the direction of rotation of the DC fan.
In some embodiments, the starting control method includes: when the adjacent difference of zero-acrross ing moment twice is greater than When preset value, determine that the initial velocity of the DC fan is zero.
In some embodiments, the DC fan is connected with drive module, and the drive module includes the three of connection A upper bridge arm and three lower bridge arms, each bridge arm includes power switch tube, and the power switch tube inverse parallel has diode, No-voltage injection includes: that described three upper bridge arms of control are simultaneously turned on and simultaneously turned off with three lower bridge arms, or described in control Three upper bridge arms are simultaneously turned off and are simultaneously turned on three lower bridge arms, so that the DC fan is in three-phase windings short circuit Working condition is to realize the no-voltage injection.
In some embodiments, the three-phase current of the DC fan, including following one of which are obtained: described in detection The bus current of DC fan, and calculate according to the bus current of the DC fan three-phase current of the DC fan；Inspection The biphase current of the DC fan is surveyed, and calculates the three-phase electricity of the DC fan according to the biphase current of the DC fan Stream；Detection obtains the three-phase current of the DC fan.
The starting control device of the DC fan of embodiment of the present invention, comprising:
Detection module, the detection module are used to inject based on no-voltage, obtain the three-phase current of the DC fan simultaneously Initial velocity and the direction of rotation of the DC fan are determined according to the three-phase current of the DC fan；
Comparison module, the comparison module are used to determine the initial velocity of the DC fan and the pass of pre-set velocity threshold value System；
Control module, the control module are used for initial velocity and the pre-set velocity threshold value according to the DC fan Relationship, control the DC fan and enter different start-up modes.
In the starting control device of the DC fan of above embodiment, the first of estimation DC fan is injected based on no-voltage Speed can calculate initial velocity and direction of rotation according to the three-phase current of DC fan, and above-mentioned control method is fairly simple, holds Easily realize.Further, and according to different initial velocity control DC fans enter different start-up modes, direct current can be improved Starting success rate of the blower at weather anomaly (blowing and raining) reduces failure exception, improves user experience.
In some embodiments, the pre-set velocity threshold value includes First Speed threshold value, and the control module is used for: when When the initial velocity is greater than the First Speed threshold value, the DC fan is controlled into direct closed-loop start-up mode；Wherein, The First Speed threshold value is positive number.
In some embodiments, the pre-set velocity threshold value includes second speed threshold value, and the control module is used for: when The initial velocity be greater than the second speed threshold value and be not more than the First Speed threshold value when, control the DC fan into Enter dynamic braking start-up mode；Wherein, the First Speed threshold value > second speed threshold value, the second speed threshold value are Positive number.
In some embodiments, the pre-set velocity threshold value includes third speed threshold value, and the control module is used for: when The initial velocity be greater than the third speed threshold value and be not more than the second speed threshold value when, control the DC fan into Enter normal positioning starting mode；Wherein, the second speed threshold value > third speed threshold value, the third speed threshold value are Negative.
In some embodiments, the pre-set velocity threshold value includes fourth speed threshold value, and the control module is used for: when The initial velocity be greater than the fourth speed threshold value and be not more than the third speed threshold value when, control the DC fan into Enter the dynamic braking start-up mode；When the initial velocity is not more than the fourth speed threshold value, detect again described straight The initial velocity of flow fan, and control the DC fan and be waited for；Wherein, the third speed threshold value > described Four threshold speeds；The fourth speed threshold value is negative.
In some embodiments, the control module is used for: when the DC fan is in the normal positioning starting mould When formula, the position fixing process that the DC fan is injected through overcurrent is first controlled, then controls the DC fan and enters open loop operation, In open loop operation, after the current rotating speed of the DC fan reaches switch speed threshold value, controls the DC fan and enter Operation with closed ring；When the DC fan is in the dynamic braking start-up mode, the DC fan is first controlled by energy consumption system Dynamic process, then control the DC fan and enter open loop operation, in open loop operation, when the current rotating speed of the DC fan After reaching the switch speed threshold value, controls the DC fan and enter operation with closed ring；When the DC fan is described direct When closed-loop start-up mode, controls the DC fan and enter operation with closed ring.
In some embodiments, the detection module is used to inject based on no-voltage, obtains the three of the DC fan Phase current, and believed at the time of current zero-crossing point with electric current under two-phase stationary coordinate system according to the three-phase current of the DC fan Number symbol determines initial velocity and the direction of rotation of the DC fan.
In some embodiments, the detection module is used for: obtaining three of DC fan when no-voltage injection Phase current；The three-phase current is transformed to and obtains the first electric current and the second electric current under the two-phase stationary coordinate system；According to institute It states the first electric current and second electric current calculates initial velocity and the direction of rotation of the DC fan.
In some embodiments, the detection module is used for according to the adjacent of first electric current and second electric current Difference calculates the initial velocity of the DC fan at the time of zero crossing twice, and according to first electric current and second electricity Flow the direction of rotation of DC fan described in the sign determination in zero-acrross ing moment.
In some embodiments, the detection module is used to be greater than preset value when the adjacent difference of zero-acrross ing moment twice When, determine that the initial velocity of the DC fan is zero.
In some embodiments, the DC fan is connected with drive module, and the drive module includes the three of connection A upper bridge arm and three lower bridge arms, each bridge arm includes power switch tube, and the power switch tube inverse parallel has diode, The control module is simultaneously turned on for controlling described three upper bridge arms and is simultaneously turned off with three lower bridge arms, or described in control Three upper bridge arms are simultaneously turned off and are simultaneously turned on three lower bridge arms, so that the DC fan is in three-phase windings short circuit Working condition is to realize the no-voltage injection.
In some embodiments, the detection module connects current sensor, and the current sensor is for detecting institute The bus current of DC fan is stated, the detection module is for obtaining the bus current of the DC fan and according to the direct current The bus current of blower calculates the three-phase current of the DC fan；Or the current sensor is for detecting the direct current wind The biphase current of machine, the detection module is for obtaining the biphase current of the DC fan and according to the two of the DC fan Phase current calculates the three-phase current of the DC fan；Or the current sensor is used to detect the three-phase of the DC fan Electric current, the detection module are used to obtain the three-phase current of the DC fan.
The outdoor unit of embodiment of the present invention, including DC fan described in DC fan and any of the above-described embodiment Start control device.
In the outdoor unit of above embodiment, the initial velocity of estimation DC fan is injected based on no-voltage, it can be according to direct current The three-phase current of blower calculates initial velocity and direction of rotation, and above-mentioned control method is fairly simple, easy to accomplish.Further Ground, and different start-up modes are entered according to different initial velocity control DC fans, it is different in weather that DC fan can be improved The often starting success rate in the case of (blowing and raining) reduces failure exception, improves user experience.
The air conditioner of embodiment of the present invention, including DC fan described in DC fan and any of the above-described embodiment Start control device.
In the air conditioner of above embodiment, the initial velocity of estimation DC fan is injected based on no-voltage, it can be according to direct current The three-phase current of blower calculates initial velocity and direction of rotation, and above-mentioned control method is fairly simple, easy to accomplish.Further Ground, and different start-up modes are entered according to different initial velocity control DC fans, it is different in weather that DC fan can be improved The often starting success rate in the case of (blowing and raining) reduces failure exception, improves user experience.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the control circuit topological diagram of the DC fan of embodiment of the present invention；
Fig. 2 is the vector controlled block diagram of the DC fan of embodiment of the present invention；
Fig. 3 is the flow diagram of the starting control method of the DC fan of embodiment of the present invention；
Fig. 4 is another flow diagram of the starting control method of the DC fan of embodiment of the present invention；
Fig. 5 is the schematic diagram of the no-voltage injection of the DC fan of embodiment of the present invention；
Fig. 6 is the schematic diagram of the initial velocity estimation of the DC fan of embodiment of the present invention；
Fig. 7 is the schematic diagram of the normal positioning starting mode of the DC fan of embodiment of the present invention；
Fig. 8 is the control block diagram of the position fixing process of the DC fan of embodiment of the present invention；
Fig. 9 is the control block diagram of the open loop operation of the DC fan of embodiment of the present invention；
Figure 10 is the schematic diagram of the dynamic braking start-up mode of the DC fan of embodiment of the present invention；
Figure 11 is the control block diagram of the no-voltage braking of the DC fan of embodiment of the present invention；
Figure 12 is the control block diagram of the forced brake of the DC fan of embodiment of the present invention；
Figure 13 is the schematic diagram of the direct closed-loop start-up mode of the DC fan of embodiment of the present invention；
Figure 14 is the module diagram of the starting control device of the DC fan of embodiment of the present invention；
Figure 15 is the structural schematic diagram of the air conditioner of embodiment of the present invention.
Main element symbol description:
DC fan 10, drive module 20, control chip 30, electrolytic capacitor 40, current sensor 50, starting control device 100, detection module 110, comparison module 120, control module 130, air conditioner 1000, outdoor unit 1100, indoor unit 1200.
Specific embodiment
Embodiments of the present invention are described below in detail, the embodiment of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, for explaining only the invention, and should not be understood as to limit of the invention System.
Referring to Fig. 1, in embodiments of the present invention, the control circuit topology of DC fan 10 include DC fan 10, Drive module 20, control chip 30 and electrolytic capacitor 40.DC fan 10 connects drive module 20.Drive module 20 is by power The three-phase bridge driving circuit of switching tube composition.Drive module 20 includes the three upper bridge arms and three lower bridge arms of connection.Three Upper bridge arm and three lower bridge arms, which are separately connected, constitutes three-phase bridge arm.Bridge arm and the connection of the first lower bridge arm have first node on first A1, bridge arm and the connection of the second lower bridge arm have second node A2 on second, and bridge arm connect with third lower bridge arm with the in third Three node A3.First node, second node and third node are respectively corresponded to be connected with the three-phase windings of DC fan 10.Control core Piece 30 can export the driving signal of DC fan 10 to drive module 20 to control six power switch tubes in drive module 20 Turn-on and turn-off, to control the operation of DC fan 10.
Bridge arm includes power switch tube, and power switch tube inverse parallel has diode.Power switch tube can be IGBT (insulation Grid bipolar junction transistor, Insulated Gate Bipolar Transistor) or MOSFET (metal-oxide half Conductor field effect transistor, Metal-Oxide-Semiconductor Field-Effect Transistor).Certainly, it drives The intelligent power module (IPM, Intelligent Power Module) of six IGBT of enclosed inside can also be used in module 20, In each IGBT inverse parallel have diode.The wind that DC fan 10 can drive for permanent-magnet brushless DC electric machine or permanent magnet synchronous motor Machine.
Referring to Fig. 2, in the present embodiment, DC fan 10 is position-sensor-free.In the nothing of DC fan 10 In the vector controlled of position sensor, given rotating speedWith estimation revolving speedTurn by pi controller (PI) output is given SquareFor example, in DC fan 10 (durface mounted permanent magnet synchronous motor), according to given torqueWith torque current COEFFICIENT KtMeter Calculation obtains given torque current(q shaft current) gives direct-axis current(d shaft current) is by weak magnetoelectricity stream ifwcIt determines.According to giving Determine d shaft currentGiven q shaft currentWith feedback current id/iqBy vector controlled output voltage ud/uq, then pass through Parker (Park) inverse transformation obtains control output voltage uα/uβ, using space vector modulation (Space VetorModulation, SVM PWM (pulse width modulation, Pulse Width Modulation) waveform) is exported, drives direct current wind by drive module 20 Machine 10 (durface mounted permanent magnet synchronous motor).Therefore, the three-phase current of DC fan 10 can be detected by current sensor 50, and Feedback current i is obtained by Clarke (Clarke) transformationα/iβ, feedback current i is obtained using Parker (Park) variationd/iq。 It then can be according to output voltage uα/uβWith feedback current iα/iβAnd the parameter of electric machine (electric motor resistance Rs, d-axis inductance LdAnd friendship Axle inductance Lq), the estimation revolving speed of DC fan 10 is calculated by position-sensor-free algorithm for estimatingWith estimation electrical angle
It should be noted that id/iqIndicate idAnd iqTwo amounts, ud/uqIndicate udAnd uqTwo amounts, uα/uβIndicate uαAnd uβ Two amounts, iα/iβIndicate iαAnd iβTwo amounts.
Please refer to Fig. 3 and Fig. 4, the starting control method of the DC fan 10 of embodiment of the present invention, comprising:
Step S10: being injected based on no-voltage, obtains the three-phase current (i of DC fan 10A、iBAnd iC) and according to direct current wind The three-phase current of machine 10 determines the initial velocity ω of DC fan 100The direction of rotation and.
Referring to Fig. 5, in step slo, no-voltage injection injects no-voltage to DC fan 10.In an embodiment party In formula, controllable three upper bridge arms are simultaneously turned on to be simultaneously turned off with three lower bridge arms, so that DC fan 10 is in three-phase windings The working condition of short circuit is to realize that no-voltage is injected.At this point, power of the three-phase windings of DC fan 10 by three upper bridge arms Switching tube and its anti-paralleled diode, which are formed, to be shorted.In other embodiment, can control three upper bridge arms simultaneously turn off and Three lower bridge arms simultaneously turn on, so that DC fan 10 is in the working condition of three-phase windings short circuit to realize that no-voltage is injected. At this point, power switch tube and its anti-paralleled diode formation short circuit of the three-phase windings of DC fan 10 by three lower bridge arms. In this way, can produce generation current and achieve the effect that dynamic braking.No-voltage is equal to zero vector voltage.
Specifically, step S10 includes: to be injected based on no-voltage, obtains the three-phase current of DC fan 10, and according to direct current The three-phase current of blower 10 is under two-phase stationary coordinate system at the time of current zero-crossing point and current signal symbol determines DC fan 10 initial velocity ω0The direction of rotation and.
It is appreciated that the three-phase current of the DC fan 10 when being injected by obtaining no-voltage；Then by three-phase electricity rheology It changes under two-phase stationary coordinate system and obtains the first electric current iαWith the second electric current iβ.In this way, can be according to the first electric current iαWith the second electricity Flow iβCalculate the initial velocity ω of DC fan 100The direction of rotation and.Three-phase current (the i of direct current generatorA、iBAnd iC) can pass through Clarke (Clarke), which transforms to, obtains the first electric current i under two-phase stationary coordinate systemαWith the second electric current iβ.The three of DC fan 10 Phase current can detect the bus current of DC fan 10 by a current sensor 50, then be obtained according to bus current calculating It takes.The three-phase current of DC fan 10 can also detect the two-phase electricity of DC fan 10 respectively by two current sensors 50 Then stream is calculated according to biphase current and is obtained.The three-phase current of DC fan 10 can also be divided by three current sensors 50 It Jian Ce not obtain.In the example of fig. 1, three current sensors 50 are connect with the three-phase windings of DC fan 10 respectively, and three Current sensor 50 detect respectively obtain three-phase current after by current signal be sent to control chip 30.
In one example, the first electric current iαWith the second electric current iβIt can be sinusoidal waveform.In other examples, the first electric current iαWith the second electric current iβIt can also be other wave modes.
Further, according to the first electric current iαWith the second electric current iβCalculate the initial velocity ω of DC fan 100With rotation side To including: according to the first electric current iαWith the second electric current iβAdjacent zero crossing twice at the time of difference calculate DC fan 10 just Beginning speed omega0, and according to the first electric current iαWith the second electric current iβThe rotation side of sign determination DC fan 10 in zero-acrross ing moment To.
In one example, referring to Fig. 6, as the second electric current iβFor when zero crossing, being recorded as the T1 moment, and recording One electric current iαSymbol.As time goes by, as the first electric current iαWhen zero crossing, it is recorded as the T2 moment, and records the second electric current iβSymbol.
At this point, initial speed=60/ (number of pole-pairs * 4* (T2-T1)) of DC fan 10, unit is revolutions per minute (revolutionsper minute, RPM).As the first electric current iαSymbol and the second electric current iβSymbol it is identical when, direct current wind The direction of rotation of machine 10 is (to indicate that DC fan 10 rotates forward) clockwise；As the first electric current iαSymbol and the second electric current iβ Symbol it is opposite when, the direction of rotation of DC fan 10 is counterclockwise (to indicate that DC fan 10 inverts).Initial velocity ω0 Including initial speed and direction.Initial velocity ω0Direction according to the direction of rotation of DC fan 10 determine.In an example In, when the direction of rotation of DC fan 10 is clockwise direction, initial velocity ω0Direction be positive；When DC fan 10 When direction of rotation is counter clockwise direction, initial velocity ω0Direction be negative, the initial velocity ω of DC fan 100The direction of rotation and It is as shown in the table:
In another example, as the first electric current iαThe the second electric current i for when zero crossing, being recorded as the T1 moment, and recordingβ Symbol.As time goes by, as the second electric current iβWhen zero crossing, it is recorded as the T2 moment, and records the first electric current iαSymbol Number.
At this point, initial speed=60/ (number of pole-pairs * 4* (T2-T1)) of DC fan 10, unit is revolutions per minute (revolutionsper minute, RPM).As the first electric current iαSymbol and the second electric current iβSymbol it is identical when, direct current wind The direction of rotation of machine 10 is counterclockwise (to indicate that DC fan 10 inverts)；As the first electric current iαSymbol and the second electric current iβ Symbol it is opposite when, the direction of rotation of DC fan 10 is the DC fan 10 that (indicates that DC fan 10 rotates forward) clockwise Initial velocity ω0It is as shown in the table with direction of rotation:
Further, as the first electric current iαWith the second electric current iβThe adjacent difference of zero-acrross ing moment twice (T2-T1) is greater than preset value When, it is believed that the initial velocity approximation zero of DC fan 10, in this case, it may be determined that the initial velocity of DC fan 10 ω0It is zero.At this point, not needing to judge the direction of rotation of DC fan 10.Preset value is, for example, 1 second, when (T2-T1) was more than 1 second, Then revolving speed is less than (15/ number of pole-pairs) RPM.
The starting control method of the DC fan 10 of embodiment of the present invention, comprising:
Step S20: the initial velocity ω of DC fan 10 is determined0With the relationship of pre-set velocity threshold value.
Specifically, in the initial velocity ω for determining DC fan 100Later, the initial velocity ω of DC fan 10 is determined0With The relationship of pre-set velocity threshold value.Pre-set velocity threshold value includes First Speed threshold value ω1, second speed threshold value ω2, third speed threshold Value ω3With fourth speed threshold value ω4.Wherein, First Speed threshold value ω1> second speed threshold value ω2> third speed threshold value ω3> the Four threshold speed ω4.First Speed threshold value ω1With second speed threshold value ω2For positive number, third speed threshold value ω3And fourth speed Threshold value ω4For negative.In some embodiments, First Speed threshold value ω1With second speed threshold value ω2For positive number it is understood that For forward rotational speed, third speed threshold value ω3With fourth speed threshold value ω4It can be understood as reverse speed for negative.
In some instances, First Speed threshold value ω1It can be between 300RPM or 400RPM or 300RPM~400RPM A numerical value.Second speed threshold value ω2It can a numerical value between 40RPM or 50RPM or 40RPM~50RPM.The Three threshold speed ω3It can a numerical value between -40RPM or -50RPM or -50RPM~-40RPM.Fourth speed threshold value ω4It can a numerical value between -300RPM or -400RPM or -400RPM~-300RPM.Preferably, First Speed threshold Value ω1With fourth speed threshold value ω4Absolute value it is identical, second speed threshold value ω2With third speed threshold value ω3Absolute value phase Together.
Specifically, step S20 includes:
Step S22: judge initial velocity ω0Whether First Speed threshold value ω is greater than1.When initial speed omega0No more than first Threshold speed ω1When, it enters step S24: judging initial velocity ω0Whether second speed threshold value ω is greater than2.When initial speed omega0 No more than second speed threshold value ω2When, it enters step S26: judging initial velocity ω0Whether third speed threshold value ω is greater than3.When Initial velocity ω0No more than third speed threshold value ω3When, it enters step S28: judging initial velocity ω0Whether fourth speed is greater than Threshold value ω4。
The starting control method of the DC fan 10 of embodiment of the present invention, comprising:
Step S30: according to the initial velocity ω of DC fan 100With the relationship of pre-set velocity threshold value, DC fan is controlled 10 enter different start-up modes.
Specifically, when initial speed omega0Greater than First Speed threshold value ω1When, enter step S32: control DC fan 10 into Enter direct closed-loop start-up mode.When initial speed omega0Greater than second speed threshold value ω2And it is not more than First Speed threshold value ω1When, Enter step S34: control DC fan 10 enters dynamic braking start-up mode.When initial speed omega0Greater than third speed threshold value ω3And it is not more than second speed threshold value ω2When, enter step S36: control DC fan 10 enters normal positioning starting mode.When Initial velocity ω0Greater than fourth speed threshold value ω4And it is not more than third speed threshold value ω3When, enter step S34: control direct current wind Machine 10 enters dynamic braking start-up mode.When initial speed omega0No more than fourth speed threshold value ω4When, redefine DC fan 10 initial velocity ω0, that is, step S10 is returned to, and control DC fan 10 and be waited for.
Referring to Fig. 7, first controlling DC fan 10 when DC fan 10 is in normal positioning starting mode and being infused through overcurrent The position fixing process entered, then DC fan 10 is controlled into open loop operation, in open loop operation, when the current rotating speed of DC fan 10 After reaching switch speed threshold value, control DC fan 10 enters operation with closed ring.
Referring to Fig. 8, given d shaft current and given q shaft current is arranged in position fixing process, and fixed decoupling angle is set Degree is run with determining the position of the rotor of DC fan 10 to control DC fan 10.Wherein, be arranged given d shaft current and Given q shaft current refers to that given d shaft current and given q shaft current are given according to certain rule, such as d shaft current and q axis electricity Stream is started from scratch respectively gradually rises up to setting value, then remains unchanged.The setting value of d shaft current and q shaft current can be identical, It can also be different.In other embodiments, it is zero that given q shaft current, which can be set, in position fixing process, and given d shaft current is started from scratch Gradually rise up to setting value；Or it is zero that given d shaft current, which can be set, given q shaft current, which is started from scratch, to be gradually risen up to set Value.Decoupling angle is not zero.In the example of fig. 8, position-sensor-free algorithm for estimating can be used to estimate DC fan 10 Magnetic linkage angle and speed.
Referring to Fig. 9, given d shaft current and given q shaft current is arranged during open loop operation, and decoupling angle is set Degree, so that the revolving speed of DC fan 10 increases.Wherein, given d shaft current is set and given q shaft current refers to given d axis electricity Stream and given q shaft current are given according to certain rule, and e.g. it is constant to be maintained at setting value for d shaft current and q shaft current；In another example It is d shaft current and q shaft current starts from scratch gradually rise up to setting value respectively, then remains unchanged.D shaft current and q shaft current Setting value may be the same or different.In other embodiments, open loop operation process can be set given q shaft current and be Zero, given d shaft current, which is started from scratch, gradually rises up to setting value；Or it is zero that given d shaft current, which can be set, gives q shaft current Start from scratch and gradually rises up to setting value.Speed (decoupling angle at the time of the rate of change of decoupling angle terminates from position fixing process The initial value of the rate of change of degree) start to be gradually lowered to zero.In the example of figure 9, position-sensor-free estimation can be used to calculate Method estimates magnetic linkage angle and the speed of DC fan 10.
Referring to Fig. 2, operation with closed ring includes current loop control and der Geschwindigkeitkreis control, using straight during operation with closed ring The estimation electrical angle of flow fan 10It is decoupled, according to given rotating speedWith the estimation revolving speed of DC fan 10It carries out Closed-loop control, DC fan 10 is with the operation of certain revolving speed when operation with closed ring.For example, DC fan 10 is with given rotating speedOperation.
Referring to Fig. 10, first controlling DC fan 10 when DC fan 10 is in dynamic braking start-up mode and passing through energy consumption The process of braking, then DC fan 10 is controlled into open loop operation, in open loop operation, when the current rotating speed of DC fan 10 reaches To after switch speed threshold value, control DC fan 10 enters operation with closed ring.In dynamic braking start-up mode, i.e. DC fan 10 There are when certain positive or reversed initial velocity, dynamic braking need to be first passed through.Dynamic braking process includes no-voltage braking and forces Brake two processes.
In one embodiment, when control DC fan 10 enters dynamic braking start-up mode, DC fan is first controlled 10, which enter no-voltage, brakes；When no-voltage is braked so that the speed of DC fan 10 is greater than the 6th threshold speed ω6And it is not more than When the 5th threshold speed ω 5, control DC fan 10 enters forced brake.
Wherein, First Speed threshold value ω1> the five threshold speed ω5> the six threshold speed ω6> fourth speed threshold value ω4。 5th threshold speed ω5For positive number, the 6th threshold speed ω6For negative.5th threshold speed ω5It can be understood as just for positive number To revolving speed, the 6th threshold speed ω6It can be understood as reverse speed for negative.In some instances, the 5th threshold speed ω5It can Think a numerical value between 25RPM or 30RPM or 25RPM~30RPM.6th threshold speed ω6Can for -25RPM or - A numerical value between 30RPM or -30RPM~-25RPM.Preferably, the 5th threshold speed ω5With the 6th threshold speed ω6's Absolute value is identical.
In another embodiment, when control DC fan 10 enters dynamic braking start-up mode, direct current wind is first controlled Machine 10 enters no-voltage and brakes；When no-voltage braking reaches a time threshold, control DC fan 10 enters forced brake. In some instances, time threshold can a numerical value between 1s or 10s or 1s~10s.
Figure 11 is please referred to, no-voltage braking includes: the fixed decoupling angle of setting and setting output d shaft voltage and q shaft voltage It is zero；The upper bridge arms of control three are simultaneously turned on to be simultaneously turned off with three lower bridge arms, or control three upper bridge arms simultaneously turn off and Three lower bridge arms simultaneously turn on, so that DC fan 10 is in the working condition of three-phase windings short circuit.
In this way, can be generated electricity by the revolving speed of DC fan 10 itself, so that being generated on the three-phase windings of DC fan 10 Generation current is to realize dynamic braking.No-voltage braking braking moment is big, and faster, than zero current braking, (zero current is braked for braking It is the rotor mechanical friction by DC fan, does not generate braking moment) effect is good.In one example, fixed decoupling angle is set It is set to zero.In the example of fig. 11, position-sensor-free algorithm for estimating can be used to estimate magnetic linkage angle and the speed of DC fan 10 Degree.
Figure 12 is please referred to, forced brake includes: that given d shaft current and q shaft current is arranged and forces setting decoupling angle；It will The rate of change of decoupling angle is gradually lowered to zero since the speed for the DC fan 10 that the no-voltage end of braking moment obtains.
It is appreciated that the given d shaft current of setting and given q shaft current refer to given d shaft current and given q shaft current It is given according to certain rule, such as d shaft current and q shaft current start from scratch gradually rise up to setting value respectively, then keeps not Become.The setting value of d shaft current and q shaft current may be the same or different.In other embodiments, forced brake process can It is zero so that given q shaft current is arranged, given d shaft current, which is started from scratch, gradually rises up to setting value；Or given d axis electricity can be set Stream is zero, and given q shaft current, which is started from scratch, gradually rises up to setting value.The rate of change for decoupling angle indicates angular speed.Zero When voltage end of braking, the speed of DC fan 10 can be obtained by estimation.Setting decoupling angle is forced, no-voltage is being terminated When braking enters forced brake, the speed for the DC fan 10 that the no-voltage end of braking moment is obtained is as the change of decoupling angle Change the initial value of rate, the rate of change for decoupling angle is gradually lowered to zero since initial value.In the illustration in fig 12, it can adopt Magnetic linkage angle and the speed of DC fan 10 are estimated with position-sensor-free algorithm for estimating.
It should be noted that decoupling angle is the angle for being used to decouple in the vector controlled of DC fan.
Figure 13 is please referred to, when DC fan 10 is in direct closed-loop start-up mode, control DC fan 10 enters closed loop and transports Row.Specifically, in direct closed-loop start-up mode, i.e., closed loop fortune is cut directly into when the forward rotational speed of DC fan 10 is higher Row, needs not move through position fixing process and open loop operation.
In some instances, switch speed threshold value can be between 100RPM or 600RPM or 100RPM~600RPM One numerical value.
The starting control method of the DC fan 10 of above embodiment injects estimation DC fan 10 based on no-voltage Initial velocity, can calculate initial velocity ω 0 and direction of rotation according to the three-phase current of DC fan 10, and above-mentioned control method compares Simply, easy to accomplish.Further, and according to different initial velocity ω0It controls DC fan 10 and enters different start-up modes, Starting success rate of the DC fan 10 at weather anomaly (blowing and raining) can be improved, reduce failure exception, improve and use Family experience.
Figure 14 is please referred to, the starting control device 100 of the DC fan 10 of embodiment of the present invention includes detection module 110, comparison module 120 and control module 130.Detection module 110 is used to inject based on no-voltage, obtains the three of DC fan 10 Phase current and the initial velocity ω that DC fan 10 is determined according to the three-phase current of DC fan 100The direction of rotation and.Compare mould Block 120 is used to determine the initial velocity ω of DC fan 100With the relationship of pre-set velocity threshold value.Control module 130 is used for basis The initial velocity ω of DC fan 100With the relationship of pre-set velocity threshold value, controls DC fan 10 and enter different start-up modes.
In other words, the starting control method of the DC fan 10 of above embodiment can be by the direct current of present embodiment The starting control device 100 of blower 10 is realized.Wherein, step S10 can be realized by detection module 110, step S20 can by than It is realized compared with module 120, step S30 can be realized by control module 130.
In the starting control device 100 of the DC fan 10 of above embodiment, based on no-voltage injection estimation direct current wind The initial velocity of machine 10 can calculate initial velocity ω according to the three-phase current of DC fan 100And direction of rotation, above-mentioned controlling party Method is fairly simple, easy to accomplish.Further, and DC fan 10 is controlled according to different initial velocity ω 0 to open into difference Starting success rate of the DC fan 10 at weather anomaly (blowing and raining) can be improved in dynamic model formula, reduces failure exception, Improve user experience.
Fig. 1 and Figure 14 are please referred to, in one embodiment, control shown in Fig. 1 can be set in starting control device 100 In coremaking piece 30, it can be understood as starting control device 100 is integrated in control chip 30.In other words, detection module 110, Comparison module 120 and control module 130 can be fully integrated into control chip 30.In other embodiments, starting control dress Setting 100 a part can be integrated in control chip, another part of starting control device 100 may be provided at other chip or In device.In other embodiments, starting control device 100 can also be fabricated to individual chip or device, straight for controlling The starting of flow fan 10.
It should be noted that the explanation of the starting control method of the DC fan 10 of above embodiment and beneficial effect Fruit is also applied for the starting control device 100 of the DC fan 10 of present embodiment, to avoid redundancy, no longer exhibition in detail herein It opens.
In some embodiments, pre-set velocity threshold value includes First Speed threshold value ω1, second speed threshold value ω2, third Threshold speed ω3With fourth speed threshold value ω4.Control module 130 is used to work as initial speed omega0Greater than First Speed threshold value ω1 When, control DC fan 10 enters direct closed-loop start-up mode；Or work as initial speed omega0Greater than second speed threshold value ω2And not Greater than First Speed threshold value ω1When, control DC fan 10 enters dynamic braking start-up mode；Or work as initial speed omega0It is greater than Third speed threshold value ω3And it is not more than second speed threshold value ω2When, control DC fan 10 enters normal positioning starting mode；Or Person works as initial speed omega0Greater than fourth speed threshold value ω4And it is not more than third speed threshold value ω3When, control DC fan 10 enters Dynamic braking start-up mode；Or work as initial speed omega0No more than fourth speed threshold value ω4When, redefine DC fan 10 Initial velocity ω0, and control DC fan 10 and be waited for.Wherein, First Speed threshold value ω1> second speed threshold value ω2> Third speed threshold value ω3> fourth speed threshold value ω4；First Speed threshold value ω1With second speed threshold value ω2For positive number, third speed Spend threshold value ω3With fourth speed threshold value ω4For negative.
In some embodiments, control module 130 is used to first control when DC fan 10 is in normal positioning starting mode The position fixing process that DC fan 10 processed is injected through overcurrent, then control DC fan 10 and enter open loop operation, in open loop operation, After the current rotating speed of DC fan 10 reaches switch speed threshold value, control DC fan 10 enters operation with closed ring.Or control Module 130 is used for when DC fan 10 is in dynamic braking start-up mode, first controls mistake of the DC fan 10 Jing Guo dynamic braking Journey, then DC fan 10 is controlled into open loop operation, in open loop operation, when the current rotating speed of DC fan 10 reaches switching speed After spending threshold value, control DC fan 10 enters operation with closed ring.Or control module 130 is used for when DC fan 10 is in direct closed loop When start-up mode, control DC fan 10 enters operation with closed ring.
In some embodiments, detection module 110 is used to inject based on no-voltage, obtains the three-phase electricity of DC fan 10 Stream, and according to the three-phase current of DC fan 10 under two-phase stationary coordinate system at the time of current zero-crossing point and current signal symbol Determine the initial velocity ω of DC fan 100The direction of rotation and.
In some embodiments, detection module 110 is used to obtain the three-phase electricity of the DC fan 10 when no-voltage is injected Stream；Three-phase current is transformed to and obtains the first electric current and the second electric current under two-phase stationary coordinate system；And according to the first electric current and The initial velocity ω of two electric currents calculating DC fan 100The direction of rotation and.
In some embodiments, detection module 110 is used for the adjacent zero passage twice according to the first electric current and the second electric current Difference calculates the initial velocity ω of DC fan 10 at the time of point0, and according to the first electric current and the second electric current in zero-acrross ing moment Sign determination DC fan 10 direction of rotation.
In some embodiments, detection module 110 is used for when the adjacent difference of zero-acrross ing moment twice is greater than preset value, really Determine the initial velocity ω of DC fan 100It is zero.
In some embodiments, DC fan 10 is connected with drive module 20, and drive module 20 includes three of connection Upper bridge arm and three lower bridge arms.Each bridge arm includes power switch tube, and power switch tube inverse parallel has diode.Control module 130 simultaneously turn on for controlling three upper bridge arms and simultaneously turn off with three lower bridge arms, or control three upper bridge arms simultaneously turn off and Three lower bridge arms simultaneously turn on, so that DC fan 10 is in the working condition of three-phase windings short circuit to realize that no-voltage is injected.
In some embodiments, detection module 110 connects current sensor 50.Current sensor 50 is for detecting direct current The bus current of blower 10, detection module 110 is for obtaining the bus current of DC fan 10 and according to the mother of DC fan 10 The three-phase current of line current calculating DC fan 10.Or current sensor 50 is used to detect the biphase current of DC fan 10, Detection module 110 is used to obtain the biphase current of DC fan 10 and calculates DC fan according to the biphase current of DC fan 10 10 three-phase current.Or current sensor 50 is used to detect the three-phase current of DC fan 10, detection module 110 is for obtaining The three-phase current of DC fan 10.
It please join Figure 15, the outdoor unit 1100 of embodiment of the present invention, including DC fan 10 and any of the above-described embodiment DC fan 10 starting control device 100.
In the outdoor unit 1100 of above embodiment, the initial velocity of estimation DC fan 10, Ke Yigen are injected based on no-voltage Initial velocity ω is calculated according to the three-phase current of DC fan 100And direction of rotation, above-mentioned control method is fairly simple, it is real to be easy It is existing.Further, and according to different initial velocity ω0It controls DC fan 10 and enters different start-up modes, can be improved straight Starting success rate of the flow fan 10 at weather anomaly (blowing and raining) reduces failure exception, improves user experience.
It should be noted that the starting control method and starting control device 100 of the DC fan 10 of above embodiment Explanation and beneficial effect be also applied for the outdoor unit 1100 of present embodiment, to avoid redundancy, no longer exhibition in detail herein It opens.
Please refer to Figure 15, the air conditioner 1000 of embodiment of the present invention, including above-mentioned DC fan 10 and any of the above-described reality Apply the starting control device 100 of the DC fan 10 of mode.In other words, air conditioner 1000 includes the outdoor of above embodiment Machine 1100, outdoor unit 1100 include the starting control device 100 of DC fan 10 and DC fan 10.
In the air conditioner 1000 of above embodiment, the initial velocity of estimation DC fan 10, Ke Yigen are injected based on no-voltage Initial velocity ω is calculated according to the three-phase current of DC fan 100And direction of rotation, above-mentioned control method is fairly simple, it is real to be easy It is existing.Further, and according to different initial velocity ω0It controls DC fan 10 and enters different start-up modes, can be improved straight Starting success rate of the flow fan 10 at weather anomaly (blowing and raining) reduces failure exception, improves user experience.
It should be noted that the starting control method and starting control device 100 of the DC fan 10 of above embodiment Explanation and beneficial effect be also applied for the air conditioner 1000 of present embodiment, to avoid redundancy, no longer exhibition in detail herein It opens.
Specifically, air conditioner 1000 further includes indoor unit 1200, and outdoor unit 1100 connects indoor unit 1200.In an example In, air conditioner 1000 can be transducer air conditioning.
It is appreciated that in some embodiments, indoor unit 1200 may also set up DC fan 10 and any of the above-described reality Apply the starting control device 100 of the DC fan 10 of mode.
In some embodiments, when outdoor unit 1100 has DC fan 10, the starting of DC fan 10 controls dress It is mountable on outdoor unit 1100 to set 100, or is mounted on indoor unit 1200, or a part installation of starting control device 100 In outdoor unit 1100, the another part for starting control device 100 is mounted on indoor unit 1200, start control device 100 this two Part can it is wired or wireless or it is wired and wireless combine by way of communicated.
In some embodiments, when indoor unit 1200 has DC fan 10, the starting of DC fan 10 controls dress It sets on 100 mountable machines indoors 1200, or is mounted on outdoor unit 1100, or a part installation of starting control device 100 In outdoor unit 1100, the another part for starting control device 100 is mounted on indoor unit 1200, start control device 100 this two Part can it is wired or wireless or it is wired and wireless combine by way of communicated.
In addition, starting control device 100 can be by wired or wireless or wired and wireless combine with DC fan 10 Mode carries out communication control.
In the description of embodiments of the present invention, term " first ", " second " are used for description purposes only, and cannot understand For indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ", The feature of " second " can explicitly or implicitly include one or more feature.In embodiments of the present invention In description, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, can also lead to It crosses intermediary to be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For ability For the those of ordinary skill in domain, can understand as the case may be above-mentioned term in embodiments of the present invention specifically contain Justice.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification, Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can be from instruction Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or their combination come real It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used Any one of following technology or their combination well known to domain is realized: being had for realizing logic function to data-signal The discrete logic of logic gates, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can integrate in a processing module, it can also To be that each unit physically exists alone, can also be integrated in two or more units in a module.It is above-mentioned integrated Module both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module If in the form of software function module realize and when sold or used as an independent product, also can store one calculating In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (26)

1. a kind of starting control method of DC fan characterized by comprising
It is injected based on no-voltage, obtain the three-phase current of the DC fan and is determined according to the three-phase current of the DC fan The initial velocity of the DC fan and direction of rotation；
Determine the initial velocity of the DC fan and the relationship of pre-set velocity threshold value；
According to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value, controls the DC fan and enter not Same start-up mode.
2. starting control method as described in claim 1, which is characterized in that the pre-set velocity threshold value includes First Speed threshold Value controls the DC fan and enters not according to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value Same start-up mode, comprising:
When the initial velocity is greater than the First Speed threshold value, the DC fan is controlled into direct closed-loop start-up mould Formula；
Wherein, the First Speed threshold value is positive number.
3. starting control method as claimed in claim 2, which is characterized in that the pre-set velocity threshold value includes second speed threshold Value controls the DC fan and enters not according to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value Same start-up mode, comprising:
When the initial velocity is greater than the second speed threshold value and is not more than the First Speed threshold value, the direct current is controlled Blower enters dynamic braking start-up mode；
Wherein, the First Speed threshold value > second speed threshold value, the second speed threshold value are positive number.
4. starting control method as claimed in claim 3, which is characterized in that the pre-set velocity threshold value includes third speed threshold Value controls the DC fan and enters not according to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value Same start-up mode, comprising:
When the initial velocity is greater than the third speed threshold value and is not more than the second speed threshold value, the direct current is controlled Blower enters normal positioning starting mode；
Wherein, the second speed threshold value > third speed threshold value, the third speed threshold value are negative.
5. starting control method as claimed in claim 4, which is characterized in that the pre-set velocity threshold value includes fourth speed threshold Value controls the DC fan and enters not according to the relationship of the initial velocity of the DC fan and the pre-set velocity threshold value Same start-up mode, comprising:
When the initial velocity is greater than the fourth speed threshold value and is not more than the third speed threshold value, the direct current is controlled Blower enters the dynamic braking start-up mode；
When the initial velocity is not more than the fourth speed threshold value, the initial velocity of the DC fan is detected again, and The DC fan is controlled to be waited for；
Wherein, the third speed threshold value > fourth speed threshold value；The fourth speed threshold value is negative.
6. starting control method as claimed in claim 5, which is characterized in that the starting control method includes:
When the DC fan is in the normal positioning starting mode, first controls the DC fan and determine through what overcurrent was injected Position process, then control the DC fan and enter open loop operation, in open loop operation, when the current rotating speed of the DC fan reaches To after switch speed threshold value, controls the DC fan and enter operation with closed ring；
When the DC fan is in the dynamic braking start-up mode, mistake of the DC fan Jing Guo dynamic braking is first controlled Journey, then control the DC fan and enter open loop operation, in open loop operation, when the current rotating speed of the DC fan reaches institute After stating switch speed threshold value, controls the DC fan and enter operation with closed ring；
When the DC fan is in the direct closed-loop start-up mode, controls the DC fan and enter operation with closed ring.
7. starting control method as described in claim 1, which is characterized in that injected based on no-voltage, obtain the direct current wind The three-phase current of machine and initial velocity and the direction of rotation that the DC fan is determined according to the three-phase current of the DC fan, Include:
It is injected based on no-voltage, obtains the three-phase current of the DC fan, and exist according to the three-phase current of the DC fan Under two-phase stationary coordinate system at the time of current zero-crossing point and current signal symbol determines initial velocity and the rotation of the DC fan Turn direction.
8. starting control method as claimed in claim 7, which is characterized in that injected based on no-voltage, obtain the direct current wind The three-phase current of machine, and according to the three-phase current of the DC fan under two-phase stationary coordinate system at the time of current zero-crossing point and Current signal symbol determines initial velocity and the direction of rotation of the DC fan, comprising:
Obtain the three-phase current of DC fan when no-voltage injection；
The three-phase current is transformed to and obtains the first electric current and the second electric current under the two-phase stationary coordinate system；
Initial velocity and the direction of rotation of the DC fan are calculated according to first electric current and second electric current.
9. starting control method as claimed in claim 8, which is characterized in that according to first electric current and second electric current Calculate initial velocity and the direction of rotation of the DC fan, comprising:
The DC fan is calculated according to difference at the time of the adjacent zero crossing twice of first electric current and second electric current Initial velocity, and the DC fan according to the sign determination of first electric current and second electric current in zero-acrross ing moment Direction of rotation.
10. starting control method as claimed in claim 9, which is characterized in that the starting control method includes:
When the adjacent difference of zero-acrross ing moment twice is greater than preset value, determine that the initial velocity of the DC fan is zero.
11. starting control method as described in claim 1, which is characterized in that the DC fan is connected with drive module, institute The three upper bridge arms and three lower bridge arms that drive module includes connection are stated, each bridge arm includes power switch tube, the function Rate switching tube inverse parallel has diode, and no-voltage injection includes:
It controls described three upper bridge arms and simultaneously turns on and simultaneously turned off with three lower bridge arms, or control described three upper bridge arms are same When shutdown and three lower bridge arms simultaneously turn on so that the DC fan be in three-phase windings be shorted working condition with reality The existing no-voltage injection.
12. starting control method as described in claim 1, which is characterized in that obtain the three-phase current of the DC fan, wrap Include following one of which:
The bus current of the DC fan is detected, and the DC fan is calculated according to the bus current of the DC fan Three-phase current；
The biphase current of the DC fan is detected, and the DC fan is calculated according to the biphase current of the DC fan Three-phase current；
Detect the three-phase current of the DC fan.
13. a kind of starting control device of DC fan characterized by comprising
Detection module, the detection module are used to inject based on no-voltage, obtain the three-phase current and basis of the DC fan The three-phase current of the DC fan determines initial velocity and the direction of rotation of the DC fan；
Comparison module, the comparison module are used to determine the initial velocity of the DC fan and the relationship of pre-set velocity threshold value；
Control module, the control module are used for the pass of initial velocity and the pre-set velocity threshold value according to the DC fan System, controls the DC fan and enters different start-up modes.
14. starting control device as claimed in claim 13, which is characterized in that the pre-set velocity threshold value includes First Speed Threshold value, the control module are used for:
When the initial velocity is greater than the First Speed threshold value, the DC fan is controlled into direct closed-loop start-up mould Formula；
Wherein, the First Speed threshold value is positive number.
15. starting control device as claimed in claim 14, which is characterized in that the pre-set velocity threshold value includes second speed Threshold value, the control module are used for:
When the initial velocity is greater than the second speed threshold value and is not more than the First Speed threshold value, the direct current is controlled Blower enters dynamic braking start-up mode；
Wherein, the First Speed threshold value > second speed threshold value, the second speed threshold value are positive number.
16. starting control device as claimed in claim 15, which is characterized in that the pre-set velocity threshold value includes third speed Threshold value, the control module are used for:
When the initial velocity is greater than the third speed threshold value and is not more than the second speed threshold value, the direct current is controlled Blower enters normal positioning starting mode；
Wherein, the second speed threshold value > third speed threshold value, the third speed threshold value are negative.
17. starting control device as claimed in claim 16, which is characterized in that the pre-set velocity threshold value includes fourth speed Threshold value, the control module are used for:
When the initial velocity is greater than the fourth speed threshold value and is not more than the third speed threshold value, the direct current is controlled Blower enters the dynamic braking start-up mode；
When the initial velocity is not more than the fourth speed threshold value, the initial velocity of the DC fan is detected again, and The DC fan is controlled to be waited for；
Wherein, the third speed threshold value > fourth speed threshold value；The fourth speed threshold value is negative.
18. starting control device as claimed in claim 17, which is characterized in that the control module is used for:
When the DC fan is in the normal positioning starting mode, first controls the DC fan and determine through what overcurrent was injected Position process, then control the DC fan and enter open loop operation, in open loop operation, when the current rotating speed of the DC fan reaches To after switch speed threshold value, controls the DC fan and enter operation with closed ring；
When the DC fan is in the dynamic braking start-up mode, mistake of the DC fan Jing Guo dynamic braking is first controlled Journey, then control the DC fan and enter open loop operation, in open loop operation, when the current rotating speed of the DC fan reaches institute After stating switch speed threshold value, controls the DC fan and enter operation with closed ring；
When the DC fan is in the direct closed-loop start-up mode, controls the DC fan and enter operation with closed ring.
19. starting control device as claimed in claim 13, which is characterized in that the detection module is used to infuse based on no-voltage Enter, obtains the three-phase current of the DC fan, and according to the three-phase current of the DC fan under two-phase stationary coordinate system At the time of current zero-crossing point and current signal symbol determines initial velocity and the direction of rotation of the DC fan.
20. starting control device as claimed in claim 19, which is characterized in that the detection module is used for:
Obtain the three-phase current of DC fan when no-voltage injection；
The three-phase current is transformed to and obtains the first electric current and the second electric current under the two-phase stationary coordinate system；
Initial velocity and the direction of rotation of the DC fan are calculated according to first electric current and second electric current.
21. starting control device as claimed in claim 20, which is characterized in that the detection module is used for according to described first Difference calculates the initial velocity of the DC fan at the time of the adjacent zero crossing twice of electric current and second electric current, and according to The direction of rotation of DC fan described in the sign determination of first electric current and second electric current in zero-acrross ing moment.
22. starting control device as claimed in claim 21, which is characterized in that the detection module is used to work as described adjacent two When secondary zero-acrross ing moment difference is greater than preset value, determine that the initial velocity of the DC fan is zero.
23. starting control device as claimed in claim 13, which is characterized in that the DC fan is connected with drive module, The drive module includes the three upper bridge arms and three lower bridge arms of connection, and each bridge arm includes power switch tube, described Power switch tube inverse parallel has diode, and the control module simultaneously turns on and described three for controlling described three upper bridge arms Lower bridge arm simultaneously turns off, or control described three upper bridge arms are simultaneously turned off and simultaneously turned on three lower bridge arms, so that described DC fan is in the working condition of three-phase windings short circuit to realize the no-voltage injection.
24. starting control device as claimed in claim 13, which is characterized in that the detection module connects current sensor, The current sensor is used to detect the bus current of the DC fan, and the detection module is for obtaining the DC fan Bus current and the three-phase current of the DC fan is calculated according to the bus current of the DC fan；Or
The current sensor is used to detect the biphase current of the DC fan, and the detection module is for obtaining the direct current The biphase current of blower and the three-phase current that the DC fan is calculated according to the biphase current of the DC fan；Or
The current sensor is used to detect the three-phase current of the DC fan, and the detection module is for obtaining the direct current The three-phase current of blower.
25. a kind of outdoor unit, which is characterized in that including DC fan and the described in any item DC fans of claim 13-24 Starting control device.
26. a kind of air conditioner, which is characterized in that including DC fan and the described in any item DC fans of claim 13-24 Starting control device.
CN201811115566.3A 2018-09-25 2018-09-25 Starting control method and device of direct current fan, outdoor unit and air conditioner Active CN109245654B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115276499A (en) * 2022-08-26 2022-11-01 珠海市伟高变频科技有限公司 Method and system for estimating natural rotation speed of permanent magnet synchronous fan motor
WO2023138357A1 (en) * 2022-01-18 2023-07-27 合肥美的暖通设备有限公司 Control method, control apparatus and control system for eletric motor, and readable storage medium and air conditioner

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424622A (en) * 1993-11-29 1995-06-13 Baldor Electric Company, Inc. Dynamic brake assembly
MX9504611A (en) * 1994-11-02 1997-04-30 Gen Electric Electrically propelled golf car.
JP2010193648A (en) * 2009-02-19 2010-09-02 Canon Inc Controller for driving dc brushless motor and image forming device
CN104113242A (en) * 2013-06-18 2014-10-22 广东美的制冷设备有限公司 Starting method for DC blower of unposition sensor and DC blower controller
CN104481907A (en) * 2014-12-05 2015-04-01 广东美的制冷设备有限公司 Starting and controlling method and device for direct-current fan
WO2016059779A1 (en) * 2014-10-17 2016-04-21 株式会社デンソー Motor control device
CN106208882A (en) * 2016-07-27 2016-12-07 广东威灵电机制造有限公司 Electric motor starting control method and device
CN107702294A (en) * 2017-11-03 2018-02-16 珠海格力电器股份有限公司 Upwind starting control method and circuit of external fan of variable frequency air conditioner and air conditioner thereof
CN108105139A (en) * 2017-12-19 2018-06-01 海信（山东）空调有限公司 Permanent magnet synchronous direct flow fan starts control method, device and air-conditioner outdoor unit
CN108258950A (en) * 2017-08-29 2018-07-06 苏州博牛电气有限公司 The control method that permanent-magnet brushless DC electric machine driving starts
CN108418480A (en) * 2018-03-27 2018-08-17 苏州半唐电子有限公司 A kind of startup method without sensing permanent magnet synchronous motor

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5424622A (en) * 1993-11-29 1995-06-13 Baldor Electric Company, Inc. Dynamic brake assembly
MX9504611A (en) * 1994-11-02 1997-04-30 Gen Electric Electrically propelled golf car.
JP2010193648A (en) * 2009-02-19 2010-09-02 Canon Inc Controller for driving dc brushless motor and image forming device
CN104113242A (en) * 2013-06-18 2014-10-22 广东美的制冷设备有限公司 Starting method for DC blower of unposition sensor and DC blower controller
WO2016059779A1 (en) * 2014-10-17 2016-04-21 株式会社デンソー Motor control device
CN104481907A (en) * 2014-12-05 2015-04-01 广东美的制冷设备有限公司 Starting and controlling method and device for direct-current fan
CN106208882A (en) * 2016-07-27 2016-12-07 广东威灵电机制造有限公司 Electric motor starting control method and device
CN108258950A (en) * 2017-08-29 2018-07-06 苏州博牛电气有限公司 The control method that permanent-magnet brushless DC electric machine driving starts
CN107702294A (en) * 2017-11-03 2018-02-16 珠海格力电器股份有限公司 Upwind starting control method and circuit of external fan of variable frequency air conditioner and air conditioner thereof
CN108105139A (en) * 2017-12-19 2018-06-01 海信（山东）空调有限公司 Permanent magnet synchronous direct flow fan starts control method, device and air-conditioner outdoor unit
CN108418480A (en) * 2018-03-27 2018-08-17 苏州半唐电子有限公司 A kind of startup method without sensing permanent magnet synchronous motor

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
姚绪梁: "《现代交流调速技术》", 30 September 2009, 哈尔滨工程大学出版社 *
廖晓钟: "《自动控制系统 第2版》", 30 April 2011, 北京理工大学出版社 *
张细政: "《电动汽车新型电机驱动与能量管理控制技术》", 30 November 2017, 电子科技大学出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023138357A1 (en) * 2022-01-18 2023-07-27 合肥美的暖通设备有限公司 Control method, control apparatus and control system for eletric motor, and readable storage medium and air conditioner
CN115276499A (en) * 2022-08-26 2022-11-01 珠海市伟高变频科技有限公司 Method and system for estimating natural rotation speed of permanent magnet synchronous fan motor

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