CN106130419A - Direct current motor control device, direct current motor control method, direct current motor and air purifier - Google Patents
Direct current motor control device, direct current motor control method, direct current motor and air purifier Download PDFInfo
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- CN106130419A CN106130419A CN201610520718.2A CN201610520718A CN106130419A CN 106130419 A CN106130419 A CN 106130419A CN 201610520718 A CN201610520718 A CN 201610520718A CN 106130419 A CN106130419 A CN 106130419A
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- motor drive
- direct current
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
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- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000000827 velocimetry Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention relates to the field of control, in particular to a direct current motor control device, a direct current motor control method, a direct current motor and an air purifier. The control device comprises a storage unit, a judgment unit and a control unit; the storage unit is used for storing the corresponding relation between the operation stage of the direct current motor and the duty ratio adjustment of the motor driving signal; the judging unit is used for determining the operation stage of the direct current motor; and the control unit is used for controlling the adjustment of the duty ratio of the motor driving signal according to the operation stage determined by the judging unit and the corresponding relation. According to the scheme provided by the invention, the rotating speed of the direct current motor is regulated by regulating the duty ratio PWM, and in the regulation process, corresponding regulation modes are provided aiming at different stages of the direct current motor so as to gradually reach the target rotating speed and reduce the possibility of locked rotor.
Description
Technical field
The present invention relates to control field, particularly relate to DC machine control device, control method, direct current generator and air clean
Change device.
Background technology
In engineering, if within the starting time of design, motor speed does not reaches rated speed, then it is assumed that occur stifled
Turn.If motor generation stall, not only electrical network and motor itself are had undesirable effect, and to the equipment dragged and building ring
Border also can produce adverse consequences, even can have serious consequences.
Summary of the invention
Present invention is primarily targeted at the defect overcoming above-mentioned prior art, it is provided that a kind of DC MOTOR CONTROL dress
Put, control method, direct current generator and air purifier, effectively regulate, effectively to reach target solving the rotating speed of direct current generator
Rotating speed, it is to avoid stall occurs.
One aspect of the present invention provides the control device of a kind of direct current generator, and it includes memory element, it is judged that unit, with control
Unit processed；
Described memory element, is used for storing between described direct current generator operation phase and the adjustment of motor drive signal dutycycle
Corresponding relation；
Described judging unit, for determining the operation phase of described direct current generator；
Described control unit, controls electricity for the operation phase determined according to described judging unit and described corresponding relation
Machine drives the adjustment of signal dutyfactor.
Alternatively, the startup stage that the described operation phase including, start after-stage, close down in the stage at least one.
Alternatively, time the startup stage that the described operation phase including, with startup stage corresponding motor drive signal dutycycle
Adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed, and when described dutycycle is less than the first duty cycle threshold, account for described
Empty ratio adjusts to the first duty cycle threshold.
Alternatively, when the described operation phase includes starting after-stage, the motor corresponding with described startup after-stage drives letter
Number dutycycle adjust particularly as follows:
When actual speed is more than setting speed, reduce the dutycycle of motor drive signal, when actual speed is less than setting
During rotating speed, and when the difference of setting speed and actual speed is more than the first difference, improve the dutycycle of motor drive signal.
Alternatively, described setting speed is the biggest with the difference of actual speed, the dutycycle of described raising motor drive signal
Adjustment amplitude the biggest.
Alternatively, described memory element, also include that the dutycycle of motor drive signal adjusts amplitude and described setting speed
With the second corresponding relation of the difference of actual speed, determine described raising motor drive signal according to described second corresponding relation
The adjustment amplitude of dutycycle.
Alternatively, after entering startup after-stage, first determine whether whether the dutycycle of motor drive signal accounts for less than second
Empty ratio threshold value, if less than, machine drive the dutycycle of signal adjust to the second duty cycle threshold；Described second duty cycle threshold
Equal to direct current generator dutycycle lower limit.
Alternatively, the described operation phase includes the stage of closing down, and the motor drive signal dutycycle corresponding with the stage of closing down is adjusted
Whole particularly as follows:
If dutycycle is more than or equal to the 3rd duty cycle threshold, then during dutycycle is down to the 1/8 to 1/5 of former dutycycle
Value, then it is down to zero with first rate；If dutycycle is less than the 3rd duty cycle threshold, then dutycycle is adjusted to zero.
Alternatively, described device also includes that stall determines unit, after when the time more than or equal to very first time threshold value, and electricity
The actual speed of machine does not reaches setting speed, it is determined that motor rotation blockage.
Alternatively, described device also includes rotation-clogging protection unit, is used for after stall determines that unit determines motor rotation blockage, will
The dutycycle of motor drive signal adjusts to the direct current generator dutycycle upper limit and keeps the second time threshold, if motor speed reaches not
To the second rotating speed, then enter electric motor protecting state；Or after stall determines that unit determines motor rotation blockage, by motor drive signal
Dutycycle adjust to the upper limit and keep the second time threshold, if motor speed does not reaches the second rotating speed, stall the 3rd time threshold
After value, then the dutycycle of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed does not still reach
Second rotating speed, then enter electric motor protecting state.
Present invention also offers a kind of direct current generator, it is characterised in that include the control of any of the above-described described direct current generator
Device processed.
Present invention also offers a kind of air purifier, it includes that above-mentioned direct current generator includes above-mentioned control device.
Present invention also offers the control method of a kind of direct current generator, comprising:
Store the corresponding relation between described direct current generator operation phase and the adjustment of motor drive signal dutycycle；
Determine the operation phase of described direct current generator；
The adjustment of motor drive signal dutycycle is controlled according to the operation phase determined and described corresponding relation.
Alternatively, the startup stage that the described operation phase including, start after-stage, close down in the stage at least one.
Alternatively, time the startup stage that the described operation phase including, with startup stage corresponding motor drive signal dutycycle
Adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed, and when described dutycycle is less than the first duty cycle threshold, account for described
Empty ratio adjusts to the first duty cycle threshold.
Alternatively, when the described operation phase includes starting after-stage, the motor corresponding with described startup after-stage drives letter
Number dutycycle adjust particularly as follows:
When actual speed is more than setting speed, reduce the dutycycle of motor drive signal, when actual speed is less than setting
During rotating speed, and when the difference of setting speed and actual speed is more than the first difference, improve the dutycycle of motor drive signal.
Alternatively, described setting speed is the biggest with the difference of actual speed, the dutycycle of described raising motor drive signal
Adjustment amplitude the biggest.
Alternatively, described method also include storing the dutycycle of motor drive signal adjust amplitude and described setting speed with
Second corresponding relation of the difference of actual speed, determines accounting for of described raising motor drive signal according to described second corresponding relation
The adjustment amplitude of empty ratio.
Alternatively, after entering startup after-stage, first determine whether whether the dutycycle of motor drive signal accounts for less than second
Empty ratio threshold value, if less than, machine drive the dutycycle of signal adjust to the second duty cycle threshold；Described second duty cycle threshold
Equal to direct current generator dutycycle lower limit.
Alternatively, the described operation phase includes the stage of closing down, and the motor drive signal dutycycle corresponding with the stage of closing down is adjusted
Whole particularly as follows:
If dutycycle is more than or equal to the 3rd duty cycle threshold, then during dutycycle is down to the 1/8 to 1/5 of former dutycycle
Value, then it is down to zero with first rate；If dutycycle is less than the 3rd duty cycle threshold, then dutycycle is adjusted to zero.
Alternatively, described method also includes that stall determines step, after when the time more than or equal to very first time threshold value, and electricity
The actual speed of machine does not reaches setting speed, it is determined that motor rotation blockage.
Alternatively, described method also includes rotation-clogging protection step, for after determining motor rotation blockage, by motor drive signal
Dutycycle adjust to the direct current generator dutycycle upper limit and keep the second time threshold, if motor speed does not reaches the second rotating speed,
Then enter electric motor protecting state；Or after determining motor rotation blockage, the dutycycle of motor drive signal is adjusted to the upper limit and protects
Hold the second time threshold, if motor speed does not reaches the second rotating speed, after stall the 3rd time threshold, then by motor drive signal
Dutycycle adjusts to the upper limit and keeps the 4th time threshold, if motor speed does not still reach the second rotating speed, then enters electric motor protecting
State.
The scheme that the present invention provides regulates the rotating speed of direct current generator by adjusting dutycycle PWM, is in course of adjustment, pin
Direct current generator different phase is given the adjustment mode of correspondence, to progressively reach rotating speed of target, decreases the probability of stall.
Present invention also offers the progressively processing mode after the stall of direct current generator, and carry out rotation-clogging protection to prevent because of stifled
Turn and electrical network and motor itself are had undesirable effect.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation controlling device of direct current generator in the embodiment that the present invention provides；
Fig. 2 is the schematic diagram of direct current generator in the embodiment that the present invention provides；
Fig. 3 is the schematic diagram of air purifier in the embodiment that the present invention provides；
Fig. 4 is the step schematic diagram of DC motor control method in the embodiment that the present invention provides；
Fig. 5 is to comprise stall detection and the control device of protection in another embodiment that the present invention provides.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described by corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that so use
Data can exchange in the appropriate case, in order to embodiments of the invention described herein can with except here diagram or
Order beyond those described is implemented.Additionally, term " includes " and " having " and their any deformation, it is intended that cover
Cover non-exclusive comprising, such as, contain series of steps or the process of unit, method, system, product or equipment are not necessarily limited to
Those steps clearly listed or unit, but can include the most clearly listing or for these processes, method, product
Or intrinsic other step of equipment or unit.
The problem being susceptible to stall based on current direct current generator, the invention provides the control dress of a kind of direct current generator
Putting, direct current generator is controlled by this control device from open state, until it reaches rotating speed of target.This control device, specifically wraps
Include: include memory element, it is judged that unit, with control unit；Fig. 1 illustrates the annexation of each unit, wherein,
Memory element, for storing the corresponding pass between direct current generator operation phase with the adjustment of motor drive signal dutycycle
System, calls for control unit.Owing to direct current generator is in stages such as starting shooting, start, operate, close down, the running speed of motor is all
Difference, sets up suitable corresponding relation, and then progressively regulates rotating speed by this corresponding relation motor just can be promoted normally to work.?
This technology use regulation PWM (pulse width modulation) dutycycle regulate the rotating speed of direct current generator.Pwm dutycycle is exactly one
The ratio in the shared whole cycle of high level in pulse period.1 second low level PWM ripple dutycycle of such as 1 second high level is
50%.Pwm is exactly pulse width modulation.
Judging unit, for determining the operation phase of direct current generator；The operation phase determined is shared to control by judging unit
Unit processed, control unit, the operation phase determined according to judging unit, call the corresponding relation of memory element storage, and then adjust
Whole control motor drive signal dutycycle.
For the different stages, provide following Adjusted Option (i.e. corresponding relation):
After start startup stage, with startup stage corresponding motor drive signal dutycycle adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed, and when dutycycle is less than the first duty cycle threshold, dutycycle is adjusted
To the first duty cycle threshold, this first duty cycle threshold need according to direct current generator model, power, duty cycle range etc. concrete and
Fixed.
The principle that this stage adjusts for first to avoid dutycycle PWM too small, make PWM be maintained at the lower limit of normal range with
On, PWM to keep basically identical with rotating speed simultaneously, and this rotating speed is set to the basic rotating speed of startup.
When starting after-stage, with start motor drive signal dutycycle corresponding to after-stage adjust particularly as follows:
Alternatively, it is judged that whether the dutycycle of motor drive signal, less than the second duty cycle threshold, if being less than, drives machine
The dutycycle of dynamic signal adjusts to the second duty cycle threshold, and to avoid dutycycle too small, the second duty cycle threshold is equal to unidirectional current
Machine dutycycle lower limit；After this adjustment, enter the progressively metamorphosis stage of rotating speed.
In the progressively adjustment of rotating speed, when actual speed is more than setting speed, reduce the dutycycle of motor drive signal,
By reducing dutycycle and then reducing actual speed；When actual speed is less than setting speed, and setting speed and actual speed
Difference more than the first difference time, improve motor drive signal dutycycle.It is in course of adjustment and follows setting speed with actual
The difference of rotating speed is the biggest, and the adjustment amplitude of the dutycycle improving motor drive signal is the biggest.
Cause stall in order to avoid anxious tune, slow tune simultaneously, note controlling adjustment amplitude and the time of adjustment, to reach in adjustment
To the purpose progressively adjusted.The dutycycle that specifically can follow motor drive signal adjusts amplitude and setting speed and actual speed
The second corresponding relation of difference, determine the adjustment amplitude of the dutycycle improving motor drive signal according to the second corresponding relation.
This second corresponding relation can also be put in the memory unit, calls for control unit.
When direct current generator is after above-mentioned adjustment progressively reaches rotating speed of target, direct current generator enters normal phase run.
In the stage of closing down, the motor drive signal dutycycle corresponding with the stage of closing down adjust particularly as follows:
If dutycycle is more than or equal to the 3rd duty cycle threshold, then during dutycycle is down to the 1/8 to 1/5 of former dutycycle
Value, then it is down to zero with first rate；If dutycycle is less than the 3rd duty cycle threshold, then dutycycle is adjusted to zero.
Above length describe be progressively adjust DC motor speed to rotating speed of target, to avoid stall phenomenon, actually
The prevention of stall.Detection and the protection of stall are described below, as it is shown in figure 5:
For detection and the protection of stall, said apparatus also includes that stall determines unit, is used for determining stall, and determine is former
It is then: stall determines that unit obtains the direct current generator operation time after start, is compared with very first time threshold value this time
Relatively, after the time is more than or equal to very first time threshold value, the actual speed of motor does not reaches setting speed, it is determined that motor rotation blockage.
Said apparatus also includes rotation-clogging protection unit, for after stall determines that unit determines motor rotation blockage, is driven by motor
The dutycycle of dynamic signal adjusts to the direct current generator dutycycle upper limit and keeps the second time threshold, if motor speed does not reaches second
Rotating speed, then enter electric motor protecting state.
It should be noted that in other examples, repeatedly can confirm whether entering electric motor protecting state,
Such as: carry out twice confirmation, its executive mode is: after stall determines that unit determines motor rotation blockage, by motor drive signal
Dutycycle adjusts to the upper limit and keeps the second time threshold, if motor speed does not reaches the second rotating speed, stall the 3rd time threshold
After, then the dutycycle of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed does not still reach
Two rotating speeds, then enter electric motor protecting state.
Embodiment 1
For the above embodiments principle, provide the concrete of a kind of direct current generator below by the present embodiment 1 and control:
In the present embodiment, the rotating speed of direct current generator is by controlling the realization of the size of dutycycle PWM, this direct current generator
Dutycycle PWM scope is 5%-75%.
The rotating speed of direct current generator uses M velocimetry (measured frequency method), in certain sampling period Tm, is produced with encoder
Umber of pulse determine that the method for speed is referred to as M velocimetry.If encoder rotates a circle, (P is for selecting coding for P pulse of generation
The important evidence of device, is constant), and in sampling period Tm set in advance, obtain m1 pulse, then can obtain motor
Revolutions per minute i.e. rotating speed nM be:
It is first powered on, at open state, it is judged that DC motor speed, locates if rotating speed does not do less than 180R/min, PWM accounting
Reason；If rotating speed is more than or equal to 180R/min, and PWM accounting is less than 7.5%, then PWM is set to 7.5% accounting, otherwise maintains current
PWM accounting.Then the entrance next stage is determined.
After electric motor starting, adjust dutycycle according to the difference of actual speed and setting speed, work as actual speed setting speed
Time, dutycycle reduces；When actual speed < during setting speed (△ R=setting speed-actual speed), improves dutycycle PWM and increases
Add.
As a example by PWM cycle is 1 millisecond, when adjusting PWM, the cycle is constant, changes dutycycle by adjusting high level time,
High level is adjusted 1us to be equivalent to dutycycle and be have adjusted 1/1000.Specifically adjust parameter (the i.e. second corresponding relation) and be specifically shown in Table 1 institute
Showing, setting speed is the biggest with the difference of actual speed, and the adjustment amplitude of the dutycycle of described raising motor drive signal is the biggest.
| Rotating speed difference (r/min) | Dutycycle high level adjusts the time (us) |
| △ R >=100 | 5 |
| 100 > △ R >=80 | 3 |
| 80 > △ R >=60 | 2 |
| 60 > △ R >=40 | 1.5 |
| 40 > △ R >=20 | 1 |
| 20 > △ R >=10 | 0.5 |
| △R<10 | Do not adjust |
Direct current generator is adjusted into the normal operation stage through above-mentioned.
Close down the stage at direct current generator, disconnect motor 310V power supply, judge PWM accounting now simultaneously, if dutycycle PWM
More than or equal to 22.5%, subtracting 15% by accounting (in the 1/8-1/5 of former dutycycle), if accounting is less than 22.5%, accounting is direct
Reduce to 0, hereafter PWM duty cycle is progressively reduced to 0.
During whole above-mentioned adjustment, control device and also carrying out stall detection and rotation-clogging protection:
After being more than or equal to the very first time threshold value duration of runs after start, the actual speed of motor does not reaches setting and turns
Speed, it is determined that motor rotation blockage.
Once it is determined that stall, blow in machine, by PWM higher limit (75%), operates 15 seconds, if the rotating speed of direct current generator
It is not more than 300rpm, then by 5 seconds out of service for blower fan, again by PWM higher limit (75%) after 5 seconds, operates 15 seconds, if also
It is not reach 300rpm, is then directly entered rotation-clogging protection.
After entering rotation-clogging protection, closing all loads, point out fault, button is effective, and shutdown does not show fault, turns back on
Remove fault.
The present invention also protects a kind of direct current generator, as in figure 2 it is shown, this direct current generator comprises above-mentioned DC MOTOR CONTROL dress
Put.
The present invention also protects a kind of air purifier, as it is shown on figure 3, this air purifier uses above-mentioned direct current generator.
In order to the control flow of above-mentioned direct current generator is carried out clearer and more definite, apparent arrangement, direct current generator is described below
Control method, as shown in Figure 4, including:
Step 110, the corresponding relation between storage direct current generator operation phase and the adjustment of motor drive signal dutycycle；
Step 120, determines the operation phase of direct current generator；
Step 130, controls the adjustment of motor drive signal dutycycle according to the operation phase determined and corresponding relation.
Wherein, the startup stage that the operation phase including, start after-stage, close down in the stage at least one.
Time the startup stage that operation phase being, with startup stage corresponding motor drive signal dutycycle adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed (180R/min as in embodiment 1), and dutycycle accounts for less than first
Empty than threshold value (such as 7.5% in embodiment 1) time, dutycycle is adjusted to the first duty cycle threshold (in embodiment 1
7.5%).
Motor enters and starts after-stage, with start motor drive signal dutycycle corresponding to after-stage adjust particularly as follows:
Judge whether the dutycycle of motor drive signal is less than the second duty cycle threshold (such as 5% in embodiment 1), if little
Adjust to the second duty cycle threshold (such as 5% in embodiment 1) in then machine being driven the dutycycle of signal；Second duty cycle threshold
Lower limit equal to direct current generator duty cycle range (such as embodiment 15%-75%)；
When actual speed is more than setting speed, reduce the dutycycle of motor drive signal, when actual speed is less than setting
During rotating speed, and when the difference of setting speed and actual speed is more than the first difference (10R/min as in embodiment 1), improve electricity
Machine drives the dutycycle of signal, and setting speed is the biggest with the difference of actual speed, improves the tune of the dutycycle of motor drive signal
View picture degree is the biggest.The second corresponding relation of amplitude and setting speed with the difference of actual speed is adjusted according to dutycycle；Improve
The adjustment amplitude of the dutycycle of motor drive signal.
Therefore, before step 130, also include step 140:
Step 140, adjusts the second corresponding relation of amplitude and setting speed with the difference of actual speed by dutycycle；Second
Corresponding relation sees the above table 1.
In the stage of closing down, the motor drive signal dutycycle corresponding with the stage of closing down adjust particularly as follows:
If dutycycle is more than or equal to the 3rd duty cycle threshold (such as 22.5% in embodiment 1), then dutycycle is down to former accounting for
A value (such as 15% in embodiment 1) in the 1/8 to 1/5 of empty ratio, then it is down to zero with first rate；If dutycycle is less than the
Three duty cycle threshold (such as 22.5% in embodiment 1), then dutycycle is adjusted to zero.
During the adjustment of step 130, also include step 150,
Step 150, stall determines step, after when the time more than or equal to very first time threshold value, the actual speed of motor
Do not reach setting speed, it is determined that motor rotation blockage.
Step 160, rotation-clogging protection step,
This step at least two kinds of executive modes:
Mode one, after determining motor rotation blockage, adjusts the dutycycle of motor drive signal to direct current generator dutycycle
Limit (such as 75% in embodiment 1) also keeps the second time threshold (such as in embodiment 1 15 seconds), if motor speed does not reaches second
Rotating speed (such as embodiment 1300r/min), then enter electric motor protecting state.
After entering rotation-clogging protection, closing all loads, point out fault, button is effective, and shutdown does not show fault, turns back on
Remove fault.
Mode two, after determining motor rotation blockage, adjusts the dutycycle of motor drive signal to the upper limit (in embodiment 1
75%) and keep the second time threshold (such as in embodiment 1 15 seconds), if motor speed does not reaches the second rotating speed (such as embodiment
1300r/min), after stall the 3rd time threshold (such as in embodiment 15 seconds), then the dutycycle of motor drive signal is adjusted to
The upper limit (such as 75% in embodiment 1) also keeps the 4th time threshold (such as in embodiment 1 15 seconds), if motor speed does not still reach
Second rotating speed (such as embodiment 1300r/min), then enter electric motor protecting state.
After entering rotation-clogging protection, closing all loads, point out fault, button is effective, and shutdown does not show fault, turns back on
Remove fault.
Function described herein can be implemented in hardware, the processor software, firmware or its any combination that perform.
If implemented in the software performed by processor, then function can be stored in computer as one or more instruction or code
Transmitted on readable media or via computer-readable media.Other example and embodiment are wanted in the present invention and appended right
In seeking scope and the spirit of book.For example, owing to the character of software, function described above can use by processor,
The software that hardware, firmware, hardwired or the combination appointing whichever in these perform is implemented.Additionally, each functional unit can be integrated
In a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be passed through other
Mode realizes.Wherein, device embodiment described above is only schematically, the division of the most described unit, Ke Yiwei
A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual
Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, unit or module or communication link
Connect, can be being electrical or other form.
The described unit illustrated as separating component can be or may not be physically separate, as controlling dress
The parts put can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be for personal computer, server or the network equipment etc.) perform the whole of method described in each embodiment of the present invention or
Part steps.And aforesaid storage medium includes: USB flash disk, read only memory (ROM, Read-Only Memory), random access memory are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can store program code
Medium.
Described only embodiments of the invention, are not limited to the present invention, come for those skilled in the art
Saying, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, equivalent
Replacement, improvement etc., within should be included in scope of the presently claimed invention.
Claims (22)
1. the control device of a direct current generator, it is characterised in that include memory element, it is judged that unit, with control unit；
Described memory element, for store described direct current generator operation phase and motor drive signal dutycycle adjust between right
Should be related to；
Described judging unit, for determining the operation phase of described direct current generator；
Described control unit, controls motor for the operation phase determined according to described judging unit and described corresponding relation and drives
The adjustment of dynamic signal dutyfactor.
Device the most according to claim 1, it is characterised in that the startup stage that the described operation phase including, start after-stage,
Close down at least one in the stage.
Device the most according to claim 1 and 2, it is characterised in that time the startup stage that the described operation phase including, with startup
Motor drive signal dutycycle corresponding to stage adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed, and when described dutycycle is less than the first duty cycle threshold, by described dutycycle
Adjust to the first duty cycle threshold.
4. according to the arbitrary described device of claim 1-3, it is characterised in that when the described operation phase includes starting after-stage,
The motor drive signal dutycycle corresponding with described startup after-stage adjust particularly as follows:
When actual speed is more than setting speed, reduce the dutycycle of motor drive signal, when actual speed is less than setting speed
Time, and when the difference of setting speed and actual speed is more than the first difference, improve the dutycycle of motor drive signal.
Device the most according to claim 4, it is characterised in that described setting speed is the biggest with the difference of actual speed, institute
The adjustment amplitude stating the dutycycle improving motor drive signal is the biggest.
Device the most according to claim 4, it is characterised in that described memory element, also includes accounting for of motor drive signal
Empty the second corresponding relation than adjustment amplitude with described setting speed with the difference of actual speed, according to described second corresponding relation
Determine the adjustment amplitude of the dutycycle of described raising motor drive signal.
7. according to the arbitrary described device of claim 4-6, it is characterised in that
After entering startup after-stage, first determine whether whether the dutycycle of motor drive signal is less than the second duty cycle threshold, if
Less than then machine driving the dutycycle of signal adjust to the second duty cycle threshold；Described second duty cycle threshold is equal to direct current generator
Dutycycle lower limit.
8. according to the arbitrary described device of claim 1-6, it is characterised in that the described operation phase includes the stage of closing down, with pass
Stop motor drive signal dutycycle corresponding to stage adjust particularly as follows:
If dutycycle be more than or equal to the 3rd duty cycle threshold, then a value during dutycycle is down to the 1/8 to 1/5 of former dutycycle,
It is down to zero again with first rate；If dutycycle is less than the 3rd duty cycle threshold, then dutycycle is adjusted to zero.
9. according to the arbitrary described device of claim 1-8, it is characterised in that also include that stall determines unit, for working as the time
After very first time threshold value, the actual speed of motor does not reaches setting speed, it is determined that motor rotation blockage.
Device the most according to claim 9, it is characterised in that also include rotation-clogging protection unit, for determining list when stall
After unit determines motor rotation blockage, the dutycycle of motor drive signal is adjusted to the direct current generator dutycycle upper limit and kept for the second time
Threshold value, if motor speed does not reaches the second rotating speed, then enters electric motor protecting state；Or when stall determines that unit determines that motor blocks up
After Zhuaning, the dutycycle of motor drive signal is adjusted to the upper limit and keeps the second time threshold, if motor speed does not reaches second
Rotating speed, after stall the 3rd time threshold, then adjusts the dutycycle of motor drive signal to the upper limit and keeps the 4th time threshold,
If motor speed does not still reach the second rotating speed, then enter electric motor protecting state.
11. 1 kinds of direct current generators, it is characterised in that include the control device of the arbitrary described direct current generator of claim 1-10.
12. 1 kinds of air purifiers, it is characterised in that described direct current generator includes the arbitrary described unidirectional current of claim 1-10
The control device of machine.
The control method of 13. 1 kinds of direct current generators, it is characterised in that including:
Store the corresponding relation between described direct current generator operation phase and the adjustment of motor drive signal dutycycle；
Determine the operation phase of described direct current generator；
The adjustment of motor drive signal dutycycle is controlled according to the operation phase determined and described corresponding relation.
14. methods according to claim 13, it is characterised in that the rank startup stage that the described operation phase including, after startup
Section, at least one closed down in the stage.
15. according to the method described in claim 13 or 14, it is characterised in that time the startup stage that the described operation phase including, with
Startup stage corresponding motor drive signal dutycycle adjust particularly as follows:
When motor speed is more than or equal to the first rotating speed, and when described dutycycle is less than the first duty cycle threshold, by described dutycycle
Adjust to the first duty cycle threshold.
16. according to the arbitrary described method of claim 13-15, it is characterised in that the described operation phase includes starting after-stage
Time, the motor drive signal dutycycle corresponding with described startup after-stage adjust particularly as follows:
When actual speed is more than setting speed, reduce the dutycycle of motor drive signal, when actual speed is less than setting speed
Time, and when the difference of setting speed and actual speed is more than the first difference, improve the dutycycle of motor drive signal.
17. methods according to claim 16, it is characterised in that described setting speed is the biggest with the difference of actual speed,
The adjustment amplitude of the dutycycle of described raising motor drive signal is the biggest.
18. methods according to claim 16, it is characterised in that also include that the dutycycle storing motor drive signal adjusts
Amplitude and the second corresponding relation of described setting speed with the difference of actual speed, determine raising according to described second corresponding relation
The adjustment amplitude of the dutycycle of motor drive signal.
19. according to the arbitrary described method of claim 16-18, it is characterised in that
After entering startup after-stage, first determine whether whether the dutycycle of motor drive signal is less than the second duty cycle threshold, if
Less than then machine driving the dutycycle of signal adjust to the second duty cycle threshold；Described second duty cycle threshold is equal to direct current generator
Dutycycle lower limit.
20. according to the arbitrary described method of claim 13-19, it is characterised in that the described operation phase includes the stage of closing down, with
Motor drive signal dutycycle corresponding to stage of closing down adjust particularly as follows:
If dutycycle be more than or equal to the 3rd duty cycle threshold, then a value during dutycycle is down to the 1/8 to 1/5 of former dutycycle,
It is down to zero again with first rate；If dutycycle is less than the 3rd duty cycle threshold, then dutycycle is adjusted to zero.
21. according to the arbitrary described method of claim 13-20, it is characterised in that also include that stall determines step, at that time
Between more than or equal to after very first time threshold value, the actual speed of motor does not reaches setting speed, it is determined that motor rotation blockage.
22. methods according to claim 21, it is characterised in that also include rotation-clogging protection step, for when determining motor
After stall, the dutycycle of motor drive signal is adjusted to the direct current generator dutycycle upper limit and keeps the second time threshold, if electric
Machine turn up less than the second rotating speed, then enters electric motor protecting state；Or after determining motor rotation blockage, by motor drive signal
Dutycycle adjusts to the upper limit and keeps the second time threshold, if motor speed does not reaches the second rotating speed, stall the 3rd time threshold
After, then the dutycycle of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed does not still reach
Two rotating speeds, then enter electric motor protecting state.
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| CN201610520718.2A CN106130419B (en) | 2016-07-01 | 2016-07-01 | Direct current motor control device, direct current motor control method, direct current motor and air purifier |
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| CN201610520718.2A CN106130419B (en) | 2016-07-01 | 2016-07-01 | Direct current motor control device, direct current motor control method, direct current motor and air purifier |
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| CN112803839A (en) * | 2020-12-31 | 2021-05-14 | 珠海格力电器股份有限公司 | Method and device for controlling rotating speed of air conditioner motor, storage medium and processor |
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| CN115954830A (en) * | 2023-03-13 | 2023-04-11 | 四川职业技术学院 | Motor overheating protection method and device for air purification and air purifier |
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