CN109236624A - The control method and frequency-changeable compressor of frequency-changeable compressor - Google Patents
The control method and frequency-changeable compressor of frequency-changeable compressor Download PDFInfo
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- CN109236624A CN109236624A CN201811181902.4A CN201811181902A CN109236624A CN 109236624 A CN109236624 A CN 109236624A CN 201811181902 A CN201811181902 A CN 201811181902A CN 109236624 A CN109236624 A CN 109236624A
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- Prior art keywords
- frequency
- phase
- changeable compressor
- wave
- duration
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
The invention belongs to frequency-changeable compressor technical fields, it is intended to solve the problems, such as the normal use that frequency-changeable compressor is influenced when wiring error or equipment fault occurs in existing frequency-changeable compressor.For this purpose, the frequency-changeable compressor includes three-phase motor the present invention provides a kind of control method of frequency-changeable compressor and frequency-changeable compressor, which includes: the timing at the time of the electric current of the first phase is since the first half-wave to the second half-wave zero crossing；Terminate timing at the time of the electric current of the second phase is from the first half-wave to the second half-wave zero crossing；It calculates and starts timing to the duration for terminating timing；According to the duration, the state of frequency-changeable compressor is judged.The present invention can judge the state of frequency-changeable compressor, can frequency-changeable compressor be adjusted or be repaired in time when wiring error or failure occurs in frequency-changeable compressor, compressor is avoided to generate great noise at runtime, the normal use that will not influence frequency-changeable compressor improves the service life of frequency-changeable compressor.
Description
Technical field
The invention belongs to frequency-changeable compressor technical fields, specifically provide the control method and frequency conversion pressure of a kind of frequency-changeable compressor
Contracting machine.
Background technique
Permanent magnet synchronous motor has many advantages, such as that high-efficient, small in size, noise is small and speed-regulating range width and is widely used
In U, V, W three-phase on U, V, W three-phase connecting line and electric-controlled plate on frequency-changeable compressor (such as compressor of air conditioner), frequency-changeable compressor
Connecting line corresponds, if this three-phase wiring error, can make compressor current increased dramatically, noise becomes larger, and transports for a long time
Guild causes frequency-changeable compressor to damage, to influence the normal use of frequency-changeable compressor.
Therefore, this field needs a kind of control method of new frequency-changeable compressor and corresponding frequency-changeable compressor to solve
State problem.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve existing frequency-changeable compressor occur wiring error or
The problem of normal use of frequency-changeable compressor is influenced when equipment fault, the present invention provides a kind of controlling parties of frequency-changeable compressor
Method, the frequency-changeable compressor include three-phase motor, which includes: the electric current in the first phase from the first half-wave to the second half-wave
Start timing at the time of zero crossing；Terminate timing at the time of the electric current of the second phase is from the first half-wave to the second half-wave zero crossing；
It calculates and starts timing to the duration for terminating timing；According to the duration, the state of frequency-changeable compressor is judged, wherein first
Half-wave and the second half-wave are two adjacent different half-waves, and at the time of start timing be the same electricity at the time of terminating timing
Flow two moment in the period.
In the optimal technical scheme of above-mentioned control method, " according to the duration, judging the state of frequency-changeable compressor "
Step specifically includes: if the duration be equal to the first preset value or the second preset value, frequency-changeable compressor be in rotate forward or
Person's reversion.
In the optimal technical scheme of above-mentioned control method, " according to the duration, judging the state of frequency-changeable compressor "
Step further include: if the duration had both been not equal to the first preset value or had been not equal to the second preset value, frequency-changeable compressor is connect
Line mistake breaks down.
In the optimal technical scheme of above-mentioned control method, the first preset value is 1/3T, and the second preset value is 2/3T,
In, T is current cycle.
In the optimal technical scheme of above-mentioned control method, " according to the duration, judging the state of frequency-changeable compressor "
Step specifically includes: if the duration, in the first preset range or in the second preset range, frequency-changeable compressor is in
It rotates forward or inverts.
In the optimal technical scheme of above-mentioned control method, " according to the duration, judging the state of frequency-changeable compressor "
Step further include: if the duration neither in the first preset range nor in the second preset range, frequency-changeable compressor
Wiring error or break down.
In the optimal technical scheme of above-mentioned control method, the first preset range is [1/3T-C, 1/3T+C], and second is default
Range is [2/3T-C, 2/3T+C], wherein T is current cycle, and C is the constant margin value being not zero.
In the optimal technical scheme of above-mentioned control method, the first phase is U phase, and the second phase is V phase；Alternatively, the first phase is V
Phase, the second phase are W phase；Alternatively, the first phase is W phase, the second phase is U phase.
In the optimal technical scheme of above-mentioned control method, the first half-wave is positive half-wave, and the second half-wave is negative half-wave；Or
Person, the first half-wave are negative half-wave, and the second half-wave is positive half-wave.
On the other hand, the present invention also provides a kind of frequency-changeable compressor, which includes controller, the control
Device is configured to execute above-mentioned control method.
It will be appreciated to those of skill in the art that passing through the electricity in the first phase in the preferred technical solution of the present invention
Flowing at the time of the first half-wave to the second half-wave zero crossing timing and the second phase electric current from the first half-wave to second
Terminate timing at the time of half-wave zero crossing, then calculates and start timing to the duration for terminating timing, pass through the duration
The phase that may determine that the first phase with the second difference, to judge the current state of frequency-changeable compressor, i.e. frequency-changeable compressor
Whether occur wiring error perhaps equipment fault consequently facilitating maintenance personal is adjusted or ties up to frequency-changeable compressor in time
It repairs, compressor is avoided to generate great noise at runtime, frequency-changeable compressor premature breakdown will not be caused, to will not influence
The normal use of frequency-changeable compressor, and improve the service life of frequency-changeable compressor.
Further, by judging whether the duration is equal to the first preset value or the second preset value, it can be determined that go out
Compressor be rotate forward in normal or reversion or wiring error or equipment fault occur, thus make staff or
Person maintenance personal understands the current state of frequency-changeable compressor in time, guarantees the normal operation of frequency-changeable compressor, is breaking down
Or it can also be repaired in time when wiring error.
Further, by judging whether the duration is in the first preset range or the second preset range, can sentence
Disconnected compressor out is that in normal rotating forward or reversion or wiring error or equipment fault occur, and can eliminate
There is the influence of detection error in frequency-changeable compressor, guarantees the normal operation of frequency-changeable compressor, in failure or wiring error
When can also repair in time.
In addition, the present invention also provides a kind of frequency-changeable compressor, since the frequency-changeable compressor can use above-mentioned control
Method, and then can judge the current state of frequency-changeable compressor at any time, i.e., whether frequency-changeable compressor there is wiring error or sets
Standby failure avoids compressor at runtime consequently facilitating maintenance personal is adjusted or repairs to frequency-changeable compressor in time
Great noise is generated, frequency-changeable compressor premature breakdown will not be caused, thus will not influence the normal use of frequency-changeable compressor,
And improve the service life of frequency-changeable compressor.
Detailed description of the invention
Fig. 1 is the flow chart of control method of the invention；
Fig. 2 is the flow chart of control method embodiment one of the invention；
Fig. 3 is the flow chart of control method embodiment two of the invention.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.
It should be noted that in the description of the present invention, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance.
In addition it is also necessary to explanation, in the description of the present invention unless specifically defined or limited otherwise, term is " even
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.To those skilled in the art, the tool of above-mentioned term in the present invention can be understood as the case may be
Body meaning.
Frequency conversion pressure is influenced when wiring error or equipment fault occurs in the existing frequency-changeable compressor pointed out based on background technique
The problem of normal use of contracting machine, the present invention provides a kind of control method of frequency-changeable compressor and frequency-changeable compressors, it is intended to energy
Enough current states for judging frequency-changeable compressor at any time, can be timely when wiring error or equipment fault occurs in frequency-changeable compressor
Ground is adjusted or repairs to frequency-changeable compressor, and compressor is avoided to generate great noise at runtime, will not cause to become
Frequency compressor premature breakdown to will not influence the normal use of frequency-changeable compressor, and improves the use longevity of frequency-changeable compressor
Life.
Specifically, frequency-changeable compressor of the invention includes three-phase motor and controller, and controller includes electric-controlled plate, the present invention
In be illustrated so that three-phase is U phase, V phase and W phase as an example, can detecte the electric current of U phase, V phase and W phase by electric-controlled plate, specifically
For, in practical applications, current sensor can be set in frequency-changeable compressor, which connect with electric-controlled plate,
Current sensor is used to detect the electric current of U phase, V phase and W phase.
As shown in Figure 1, control method of the invention includes: the electric current in the first phase from the first half-wave to the second half-wave zero passage
Start timing at the time of point；Terminate timing at the time of the electric current of the second phase is from the first half-wave to the second half-wave zero crossing；It calculates
Start timing to the duration for terminating timing；According to the duration, the state of frequency-changeable compressor is judged, wherein the first half-wave
Be two adjacent different half-waves with the second half-wave, and at the time of start timing be the same electric current week at the time of terminating timing
Two moment in phase.It should be noted that the first phase and the second phase can be any two phase in U phase, V phase and W phase, lead to
Spending the duration may determine that the current conditions of the first phase after the current hysteresis of the second phase, to judge the current shape of frequency-changeable compressor
State.For example, the first phase is U phase, the second phase is V phase；Alternatively, the first phase is V phase, the second phase is W phase；Again alternatively, the first phase is W
Phase, the second phase are that U is equal, and those skilled in the art can flexibly set the specific of the first phase and the second phase in practical applications
Phase, as long as can judge the current state of frequency-changeable compressor by the duration of the specific timing node of two phases.Also
It should be noted that the different half-wave in the present invention refers to the positive and negative difference of the first half-wave and the second half-wave, such as the first half-wave
For positive half-wave, the second half-wave is negative half-wave；The half-wave alternatively, the first half-wave is negative, the second half-wave are positive half-wave.That is, opening
Beginning timing and at the time of terminate timing can for positive half-wave to negative half-wave zero crossing at the time of, or negative half-wave to positive half-wave
At the time of zero crossing, since the electric current of U phase, V phase and W phase may fluctuate, but no matter how it is fluctuated, U phase, V phase and W
At the time of the electric current of phase necessarily has zero crossing, therefore carry out starting timing and terminate Clocked operation to protect at this moment
The accuracy of current detecting is demonstrate,proved, so as to accurately judge the current state of frequency-changeable compressor.
Technical solution of the present invention is set forth below with reference to two specific embodiments.
Embodiment one
As shown in Fig. 2, the step of " according to the duration, judging the state of frequency-changeable compressor " among the above specifically includes: such as
The fruit duration is equal to the first preset value, and perhaps then frequency-changeable compressor is in rotating forward or reversion to the second preset value.Wherein, first
Preset value is 1/3T, and the second preset value is 2/3T, wherein T is current cycle.Specifically, being U phase, the second phase with the first phase
It is to be equal to 1/3T for V phase when the above-mentioned duration, then illustrate that V phase current lags 120 ° of U phase current, illustrate frequency conversion at this time
Compressor rotates forward, and is equal to 2/3T when the above-mentioned duration, then illustrates that V phase current lags 240 ° of U phase current, illustrate frequency conversion at this time
Compressor reverse rotation.
The step of " according to the duration, judging the state of frequency-changeable compressor " among the above further include: if the duration was both
Also it is not equal to the second preset value not equal to the first preset value, then the wiring error of frequency-changeable compressor or breaks down.That is,
If the duration had both been not equal to 1/3T or had been not equal to 2/3T, wiring error or equipment event occur for frequency-changeable compressor at this time
Hinder (such as current sensor faults), the personnel of needing repairing check and repair.
Embodiment two
As shown in figure 3, on the basis of example 1, due to that can occur when detecting the electric current of the first phase and the second phase
Error, therefore two range intervals can be set, so that the influence of error generation is eliminated, specifically, among the above " according to lasting
Time judges the state of frequency-changeable compressor " the step of specifically include: if the duration is in the first preset range or second
In preset range, then frequency-changeable compressor, which is in, rotates forward or inverts.Wherein, the first preset range is [1/3T-C, 1/3T+C], the
Two preset ranges are [2/3T-C, 2/3T+C], wherein T is current cycle, and C is the constant margin value being not zero.Art technology
Personnel can flexibly set the specific value of C in practical applications, if by numerical value C can delimit the first preset range and
C can be set as reserving 10% to 20% design in practical applications by the specific range intervals of the second preset range
Surplus, for 20%, the occurrence of C can be 1/3T × 20%=1/15T, at this time the first preset range be [4/15T, 6/
15T], it is still U phase with the first phase that the second preset range, which is [9/15T, 11/15T], for the second phase is V phase, if above-mentioned
Duration in the first preset range (i.e. [4/15T, 6/15T]), then illustrates that frequency-changeable compressor rotates forward, if above-mentioned continues
Time in the second preset range (i.e. [9/15T, 11/15T]), then illustrates that frequency-changeable compressor inverts.
The step of " according to the duration, judging the state of frequency-changeable compressor " among the above further include: if the duration was both
Not in the first preset range also not in the second preset range, then the wiring error of frequency-changeable compressor or break down.Also
Be say, if the duration neither in the first preset range (i.e. [4/15T, 6/15T]) also not the second preset range (i.e.
[9/15T, 11/15T]) in, then at this time frequency-changeable compressor occur wiring error or equipment fault (such as current sensor therefore
Barrier), the personnel of needing repairing check and repair.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of control method of frequency-changeable compressor, the frequency-changeable compressor include three-phase motor, which is characterized in that the control
Method includes:
The timing at the time of the electric current of the first phase is since the first half-wave to the second half-wave zero crossing；
Terminate timing at the time of the electric current of the second phase is from the first half-wave to the second half-wave zero crossing；
It calculates and starts timing to the duration for terminating timing；
According to the duration, the state of the frequency-changeable compressor is judged, wherein
First half-wave and the second half-wave are two adjacent different half-waves, and at the time of start timing with end timing at the time of is
Two moment in the same current cycle.
2. control method according to claim 1, which is characterized in that " according to the duration, judge the frequency conversion pressure
The step of state of contracting machine ", specifically includes:
If the duration be equal to the first preset value or the second preset value, the frequency-changeable compressor be in rotate forward or
Reversion.
3. control method according to claim 2, which is characterized in that " according to the duration, judge the frequency conversion pressure
The step of state of contracting machine " further include:
If the duration had both been not equal to first preset value or had been not equal to second preset value, the frequency conversion pressure
The wiring error of contracting machine breaks down.
4. control method according to claim 2, which is characterized in that first preset value is 1/3T, and described second is pre-
If value is 2/3T, wherein
T is the current cycle.
5. control method according to claim 1, which is characterized in that " according to the duration, judge the frequency conversion pressure
The step of state of contracting machine ", specifically includes:
If the duration, in the first preset range or in the second preset range, the frequency-changeable compressor is in just
Turn or inverts.
6. control method according to claim 5, which is characterized in that " according to the duration, judge the frequency conversion pressure
The step of state of contracting machine " further include:
If the duration neither in first preset range nor in second preset range, the change
The wiring error of frequency compressor breaks down.
7. control method according to claim 5, which is characterized in that first preset range is [1/3T-C, 1/3T+
C], second preset range is [2/3T-C, 2/3T+C], wherein
T is the current cycle, and C is the constant margin value being not zero.
8. control method according to claim 1, which is characterized in that first phase is U phase, and the second phase is V phase；Or
Person,
First phase is V phase, and second phase is W phase；Alternatively,
First phase is W phase, and second phase is U phase.
9. control method according to any one of claim 1 to 8, which is characterized in that the first half-wave be positive half-wave, second
Half-wave is negative half-wave；Alternatively,
First half-wave is negative half-wave, and the second half-wave is positive half-wave.
10. a kind of frequency-changeable compressor, the frequency-changeable compressor includes controller, which is characterized in that the controller is configured to
Control method described in any one of enough perform claim requirements 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811181902.4A CN109236624A (en) | 2018-10-11 | 2018-10-11 | The control method and frequency-changeable compressor of frequency-changeable compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811181902.4A CN109236624A (en) | 2018-10-11 | 2018-10-11 | The control method and frequency-changeable compressor of frequency-changeable compressor |
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| Publication Number | Publication Date |
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| CN109236624A true CN109236624A (en) | 2019-01-18 |
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ID=65052136
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| CN201811181902.4A Pending CN109236624A (en) | 2018-10-11 | 2018-10-11 | The control method and frequency-changeable compressor of frequency-changeable compressor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2920883A1 (en) * | 2007-09-11 | 2009-03-13 | Peugeot Citroen Automobiles Sa | METHOD FOR DETECTING A FAILURE ON A POWER SUPPLY SYSTEM OF AN ELECTRIC LOAD |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
| CN105453208A (en) * | 2013-08-06 | 2016-03-30 | 三菱电机株式会社 | Phase control device |
| CN106645951A (en) * | 2017-02-24 | 2017-05-10 | 珠海格力电器股份有限公司 | Three-phase circuit detection apparatus and method |
| US20170256932A1 (en) * | 2016-03-07 | 2017-09-07 | Whirlpool Corporation | Method and system for detecting miswiring of a power supply for a domestic appliance |
-
2018
- 2018-10-11 CN CN201811181902.4A patent/CN109236624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2920883A1 (en) * | 2007-09-11 | 2009-03-13 | Peugeot Citroen Automobiles Sa | METHOD FOR DETECTING A FAILURE ON A POWER SUPPLY SYSTEM OF AN ELECTRIC LOAD |
| CN105453208A (en) * | 2013-08-06 | 2016-03-30 | 三菱电机株式会社 | Phase control device |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
| US20170256932A1 (en) * | 2016-03-07 | 2017-09-07 | Whirlpool Corporation | Method and system for detecting miswiring of a power supply for a domestic appliance |
| CN106645951A (en) * | 2017-02-24 | 2017-05-10 | 珠海格力电器股份有限公司 | Three-phase circuit detection apparatus and method |
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Application publication date: 20190118 |
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