CN108005890A - A kind of permanent magnet synchronous motor carrier frequency control method and system - Google Patents
A kind of permanent magnet synchronous motor carrier frequency control method and system Download PDFInfo
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- CN108005890A CN108005890A CN201711172834.0A CN201711172834A CN108005890A CN 108005890 A CN108005890 A CN 108005890A CN 201711172834 A CN201711172834 A CN 201711172834A CN 108005890 A CN108005890 A CN 108005890A
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- Prior art keywords
- frequency
- carrier frequency
- compressor
- operating frequency
- compressor operating
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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
-
- 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
- F04B49/20—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 by changing the driving speed
Abstract
The invention discloses a kind of permanent magnet synchronous motor carrier frequency control method and system, on the compressor after electricity operation, run using setting fixed frequency as driven compressor carrier frequency, and judge whether compressor operating frequency is consistent with target operating frequency, if so, driven compressor carrier frequency is adjusted to adjust carrier frequency F=2Nf；Wherein, f is the target operating frequency, and n is positive integer, if it is not, then keeping to set fixed frequency as driven compressor carrier frequency.After the control to compressor enters driven compressor carrier frequency self-regulation pattern, when compressor operating frequency reaches target operating frequency, it is in even multiples relation that driven compressor carrier frequency, which is adjusted, with compressor operating frequency, so that driven compressor carrier frequency is synchronous with compressor operating frequency, so as to improve compressor operating noise, EMC performances and noiseproof feature are improved, helps to improve product quality.
Description
Technical field
The invention belongs to motor control technology field, is to be related to a kind of permanent magnet synchronous motor carrier frequency controlling party specifically
Method and system.
Background technology
In the control fields such as compressor of air conditioner, freezer compressor, motor for washer, fan electromotor, permanent-magnet synchronous
Compressor control is most important drive control, constitutes about the action of control chip 70%.
In general, the running frequency of compressor operationally（Namely compressor rotary speed）Between the driving carrier frequency of compressor
It is that there is no association and random, compressor operating frequency f as shown in Figure 3 and the compressor drive of driven compressor control
The schematic diagram of dynamic load frequency f1, on the starting point a and end point b of a cycle of compressor operating frequency, driven compressor carries
Synchronized relation is not present in frequency therewith, and this asynchronous relation industry personnel can't pay close attention to, because will not be made to compressor control
Into obvious negative effect, product design index disclosure satisfy that national standard.
But it has been investigated that this asynchronous relation can cause easily to produce periodic noise spectrum, influence equipment
EMC（Electro Magnetic Compatibility, Electro Magnetic Compatibility）Performance and noiseproof feature, and because in current over-zero
Near point, corresponding carrier cycle is possible to sample the current signal on the zero crossing left side, it is also possible to samples on the right of zero crossing
Signal, and the sampled signal on the right is actually the signal of next current cycle, this belongs to garbage signal to this cycle, this
The accuracy of FREQUENCY CONTROL can be influenced, is unfavorable for the lifting of product quality.
The content of the invention
This application provides a kind of permanent magnet synchronous motor carrier frequency control method and system, by building compressor operating frequency
With the proportionate relationship between driven compressor carrier frequency, the two is realized to adjust driven compressor carrier frequency according to compressor operating frequency
It is synchronous, the two asynchronous noise problem occurred is solved, meets product more Precise control, more low noise requirement and smaller
EMC harmonic effects, enhance product performance.
To realize above-mentioned technique effect, the application is achieved using following technical scheme：
It is proposed a kind of permanent magnet synchronous motor carrier frequency control method, including：Judge compressor operating frequency whether with object run frequency
Rate is consistent；If so, driven compressor carrier frequency is adjusted to adjust carrier frequency F=2Nf；Wherein, f is the target operating frequency, and n is just
Integer；If it is not, keep to set fixed frequency as driven compressor carrier frequency.
It is proposed a kind of permanent magnet synchronous motor carrier frequency control system, including carrier frequency self-regulation judgment module, carrier frequency self-regulation mould
Block and carrier frequency control module；The carrier frequency is self-regulated judgment module, for judge compressor operating frequency whether with object run
Frequency is consistent；If so, then carrier frequency self-regulation module, for adjusting driven compressor carrier frequency to adjust carrier frequency F=2nf；Its
In, f is the object run carrier frequency, and n is positive integer；If it is not, the then carrier frequency control module, for keeping to set fixed frequency
Rate is as driven compressor carrier frequency.
Compared with prior art, the advantages of the application and good effect is：The permanent magnet synchronous motor carrier frequency that the application proposes
In control method and system, on the compressor after electricity work, when compressor operating frequency is not reaching to target frequency, with setting
Fixed frequency is run as driven compressor carrier frequency, after judging that compressor operating frequency reaches target frequency, then adjusts compression
It is in even multiples relation that machine, which drives carrier frequency and compressor operating frequency, so that driven compressor carrier frequency and compressor operating frequency are same
Step, that is, at the cycle starting point of one and end point of compressor operating frequency curve, driven compressor carrier frequency curve with
Compressor operating frequency curve is to overlap in zero crossing, and the effect so brought is each driven compressor radio-cycle
It is interior, periodic noise spectrum will not be produced, and then the EMC performances and noiseproof feature of equipment can be improved, current sampling signal,
Control signal etc. is all useful signal, realizes being precisely controlled for FREQUENCY CONTROL, is conducive to be lifted the quality of product.
After the detailed description of the application embodiment is read in conjunction with the figure, other features and advantage of the application will become more
Add clear.
Brief description of the drawings
Fig. 1 is the method flow diagram for the permanent magnet synchronous motor carrier frequency control method that the application proposes；
Fig. 2 is the system block diagram for the permanent magnet synchronous motor carrier frequency control system that the application proposes；
Fig. 3 is compressor operating frequency in the prior art and driven compressor carrier frequency curve synoptic diagram；
Fig. 4 is the compressor operating frequency and tune after the permanent magnet synchronous motor carrier frequency control method control proposed by the application
Save carrier frequency curve synoptic diagram；
Fig. 5 is that carrier frequency setting range exemplary plot is adjusted in the application.
Embodiment
The embodiment of the application is described in more detail below in conjunction with the accompanying drawings.
The permanent magnet synchronous motor carrier frequency control method that the application proposes, as shown in Figure 1, including the following steps：
Step S11：Judge whether compressor operating frequency is consistent with target operating frequency.
In the product after the power is turned on, compressor operating frequency gradually rises up to target operating frequency, in compressor compressor
When running frequency is not reaching to target operating frequency, driven compressor carrier frequency is judging to reach mesh using setting fixed frequency F0
After marking running frequency,
Step S12：Driven compressor carrier frequency is adjusted to adjust carrier frequency F=2nf；Wherein, f is the target operating frequency, and n is just
Integer.
After compressor operating frequency rises to target operating frequency, adjust driven compressor carrier frequency and adjust load for one
Frequently, adjusting carrier frequency F=2nf, f are current compressor running frequency, namely target operating frequency, and it is the target to adjust carrier frequency
The even multiples relation of running frequency so that driven compressor carrier frequency is synchronous with compressor operating frequency, that is, being transported in compressor
At the cycle starting point of one and end point of line frequency curve, driven compressor carrier frequency curve and compressor operating frequency curve
It is to overlap in zero crossing, as shown in figure 4, the effect so brought is in each driven compressor radio-cycle, electric current is adopted
Sample signal, control signal etc. are all the useful signals in this cycle, will not sample the signal of adjacent periods, will not produce
Periodic noise spectrum, and then the EMC performances and noiseproof feature of equipment can be improved, realize being precisely controlled for FREQUENCY CONTROL,
Be conducive to be lifted the quality of product.
In the embodiment of the present application, step S11 and step S12 are defined as driven compressor carrier frequency self-regulation mode phases, and
Whether compressor enters mode phases execution, and then there are following judgment step S10：Judge whether compressor operating frequency reaches
To threshold frequency；Namely a threshold frequency is defined, and on the compressor after electricity, in compressor operating frequency uphill process,
When compressor operating frequency does not rise to threshold frequency, to set fixed frequency as driven compressor carrier frequency, rising to
After threshold frequency, just into driven compressor carrier frequency self-regulation mode phases.
When considering switching power loss when factor, setting adjusts carrier frequency and meets following relation with compressor operating frequency：
When compressor operating frequency is less than first frequency, adjusting carrier frequency is the first secured adjusted carrier frequency；Compressor operating frequency is more than the
One frequency and when being less than second frequency, adjusts carrier frequency and meets F=af with compressor operating frequency；A is setting slope；Compressor is transported
When line frequency is more than second frequency, adjusting carrier frequency is the second secured adjusted carrier frequency；Wherein, the second secured adjusted carrier frequency is more than first
Secured adjusted carrier frequency.As shown in figure 5, when compressor operating frequency is less than 20HZ, adjusting carrier frequency is 3000HZ；When compressor is transported
When line frequency is less than 60HZ more than 20HZ, adjusts carrier frequency and take and 50 times of proportionate relationships of compressor operating frequency, namely a=50；Work as pressure
When contracting machine running frequency is more than 60HZ, adjusting carrier frequency is 5000HZ；Certainly it is above-mentioned to first have to be limited to adjusting frequency and compressor
Running frequency is under conditions of even multiples relation.
Based on permanent magnet synchronous motor carrier frequency control method set forth above, the application also proposes that a kind of permanent magnet synchronous electric is airborne
Frequency control system, as shown in Fig. 2, including carrier frequency self-regulation judgment module 21, carrier frequency self-regulation module 22 and carrier frequency control module
23。
Carrier frequency self-regulation judgment module 21 is used to judge whether compressor operating frequency is consistent with target operating frequency；If
It is that then carrier frequency self-regulation module 22 is used to adjust driven compressor carrier frequency to adjust carrier frequency F=2nf；Wherein, f carries for object run
Frequently, n is positive integer；If it is not, then carrier frequency control module 23 is used to keep to set fixed frequency as driven compressor carrier frequency.
The system further includes compressor operating frequency judgment module 24, for judging pressure in carrier frequency self-regulation judgment module 21
Before whether contracting machine running frequency is consistent with target operating frequency, judge whether compressor operating frequency reaches threshold frequency；If
It is that then carrier frequency self-regulation judgment module 21 judges whether compressor operating frequency is consistent with target operating frequency；If it is not, then carrier frequency
Control module 23 is to set fixed frequency as driving carrier frequency in one's power.
The system, which further includes, adjusts carrier frequency setting module 25, for set adjust carrier frequency and compressor operating frequency meet with
Lower relation：When compressor operating frequency is less than first frequency, adjusting carrier frequency is the first secured adjusted carrier frequency；Compressor operating frequency
When more than first frequency and being less than second frequency, adjust carrier frequency and meet F=af with compressor operating frequency；A is setting slope；Pressure
When contracting machine running frequency is more than second frequency, adjusting carrier frequency is the second secured adjusted carrier frequency；Wherein, the second secured adjusted carrier frequency is big
In the first secured adjusted carrier frequency.
Specific system is to the control mode of driven compressor carrier frequency in permanent magnet synchronous motor carrier frequency set forth above
It is described in detail in control method, it will not go into details herein.
In permanent magnet synchronous motor carrier frequency control method and system that above-mentioned the application proposes, rise in compressor operating frequency
To threshold frequency, the control to compressor enters driven compressor carrier frequency self-regulation pattern, when compressor operating frequency reaches
After target operating frequency, it is in even multiples relation to adjust driven compressor carrier frequency with compressor operating frequency so that compressor drives
Dynamic load frequency is synchronous with compressor operating frequency, so as to improve compressor operating noise, improves EMC performances and noiseproof feature,
Help to improve product quality.
It should be noted that it is limitation of the present invention that described above, which is not, the present invention is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the present invention, also should
Belong to protection scope of the present invention.
Claims (6)
- A kind of 1. permanent magnet synchronous motor carrier frequency control method, it is characterised in that including：Judge whether compressor operating frequency is consistent with target operating frequency；If so,Driven compressor carrier frequency is adjusted to adjust carrier frequency F=2Nf；Wherein, f is the target operating frequency, and n is positive integer；If It is no,Keep to set fixed frequency as driven compressor carrier frequency.
- 2. permanent magnet synchronous motor carrier frequency control method according to claim 1, it is characterised in that judging compressor operating Before whether frequency is consistent with target operating frequency, the method further includes：Judge whether the compressor operating frequency reaches threshold frequency, if so, then judge compressor operating frequency whether with mesh It is consistent to mark running frequency；If it is not, the driven compressor carrier frequency is then used as using the setting fixed frequency.
- 3. permanent magnet synchronous motor carrier frequency control method according to claim 1, it is characterised in that the adjusting carrier frequency and institute State compressor operating frequency and meet following relation：When the compressor operating frequency is less than first frequency, the adjusting carrier frequency is the first secured adjusted carrier frequency；When the compressor operating frequency is more than the first frequency and is less than second frequency, the adjusting carrier frequency and the compression Machine running frequency meets F=af；The a is setting slope；When the compressor operating frequency is more than the second frequency, the adjusting carrier frequency is the second secured adjusted carrier frequency；Wherein, The second secured adjusted carrier frequency is more than the first secured adjusted carrier frequency.
- 4. a kind of permanent magnet synchronous motor carrier frequency control system, it is characterised in that including carrier frequency self-regulation judgment module, carrier frequency self-regulated Save module and carrier frequency control module；The carrier frequency self-regulation judgment module, for judging whether compressor operating frequency is consistent with target operating frequency；If so, ThenThe carrier frequency self-regulation module, for adjusting driven compressor carrier frequency as adjusting carrier frequency F=2nf；Wherein, f is the target Carrier frequency is run, n is positive integer；If it is not, thenThe carrier frequency control module, for keeping to set fixed frequency as driven compressor carrier frequency.
- 5. permanent magnet synchronous motor carrier frequency control system according to claim 4, it is characterised in that the system also includes pressure Contracting machine running frequency judgment module；The compressor operating frequency judgment module, for judging compressor operating frequency in carrier frequency self-regulation judgment module Whether it is consistent with target operating frequency before, judge whether the compressor operating frequency reaches threshold frequency；It is if so, then described Carrier frequency self-regulation judgment module judges whether compressor operating frequency is consistent with target operating frequency；If it is not, the then carrier frequency control Molding block is using the setting fixed frequency as driving carrier frequency in one's power.
- 6. permanent magnet synchronous motor carrier frequency control system according to claim 4, it is characterised in that the system also includes tune Save carrier frequency setting module；The adjusting carrier frequency setting module, meets with ShiShimonoseki for setting the adjusting carrier frequency with the compressor operating frequency System：When the compressor operating frequency is less than first frequency, the adjusting carrier frequency is the first secured adjusted carrier frequency；When the compressor operating frequency is more than the first frequency and is less than second frequency, the adjusting carrier frequency and the compression Machine running frequency meets F=af；The a is setting slope；When the compressor operating frequency is more than the second frequency, the adjusting carrier frequency is the second secured adjusted carrier frequency；Wherein, The second secured adjusted carrier frequency is more than the first secured adjusted carrier frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711172834.0A CN108005890B (en) | 2017-11-22 | 2017-11-22 | A kind of permanent magnet synchronous motor carrier frequency control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711172834.0A CN108005890B (en) | 2017-11-22 | 2017-11-22 | A kind of permanent magnet synchronous motor carrier frequency control method and system |
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| CN108005890A true CN108005890A (en) | 2018-05-08 |
| CN108005890B CN108005890B (en) | 2019-09-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307141A (en) * | 2019-06-05 | 2019-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of frequency-changeable compressor and its control method |
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| JPH0274168A (en) * | 1988-09-09 | 1990-03-14 | Komatsu Ltd | Pwm inverter apparatus |
| JP2007110837A (en) * | 2005-10-13 | 2007-04-26 | Denso Corp | Method for estimating magnetic pole position and motor controller |
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| CN110307141A (en) * | 2019-06-05 | 2019-10-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of frequency-changeable compressor and its control method |
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| CN108005890B (en) | 2019-09-27 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151 Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd. Address before: 266700 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: Hisense (Shandong) Air-conditioning Co., Ltd. |
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