CN206180917U - Motor control system , compressor - Google Patents
Motor control system , compressor Download PDFInfo
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- CN206180917U CN206180917U CN201620838976.0U CN201620838976U CN206180917U CN 206180917 U CN206180917 U CN 206180917U CN 201620838976 U CN201620838976 U CN 201620838976U CN 206180917 U CN206180917 U CN 206180917U
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- phase windings
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Abstract
The utility model discloses a motor control system, compressor, motor control system include stator winding and rotor, stator winding includes A phase winding, B phase winding and C phase winding, the rotor includes the permanent magnet, still including being used for control the drive controller of stator winding's circular telegram electric current, drive controller can control the direct current of direction and variation in size lets in in A phase winding, B phase winding and the C phase winding respectively, so that the rotor produces the laggard line location of the rotation heating of predetermineeing the angle, location heating back, drive controller can control direct current redirecting that A phase winding, B phase winding and C phase winding let in and size so that the rotor continues to rotate along same direction predetermine the angle and later advance the line location heating. According to the configuration, the utility model provides a motor control system, its problem that can solve the easy demagnetization of permanent magnet of motor.
Description
Technical field
This utility model is related to technical field of motors, more particularly, it relates to a kind of electric machine control system, compressor.
Background technology
The motor of compressor is easily caused at low ambient temperatures the anti-demagnetization capability of motor and declines, particularly compressor
When starting failure at low ambient temperatures, there is very big demagnetization risk in the permanent magnet of motor.In order to reduce compressor low temperature
Permanent magnet demagnetization risk during startup, prior art by applying certain electric current to machine winding before compressor start,
Rotor permanent magnet is preheated to improve permanent magnetism temperature, the anti-demagnetization capability of compressor electric motor is lifted.
But, because the electric current that each phase winding change of motor applies can cause rotor to rotate, it is impossible to rotor
Each permanent magnet uniformly heat so that machine winding and each permanent magnet non-uniform temperature, the operating point of each permanent magnet and anti-
Demagnetization capability is also inconsistent so that motor magnetic circuit is asymmetric, and the resistance of motor three-phase windings is also differed, and occurs to start failure
Risk is bigger, causes single permanent magnet to demagnetize, and compressor cannot run well.
Therefore, how to solve in prior art because machine winding and each permanent magnet heating-up temperature are uneven, cause motor
The problem that permanent magnet easily demagnetizes, becomes those skilled in the art's important technological problems to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of electric machine control system, and it can solve the problem that motor forever
The problem that magnet easily demagnetizes.The purpose of this utility model also resides in a kind of compression including above-mentioned electric machine control system of offer
Machine.
A kind of electric machine control system that this utility model is provided, including stator winding and rotor, the stator winding includes A
Phase winding, B phase windings and C phase windings, the rotor includes permanent magnet, also includes the energization electricity for controlling the stator winding
The drive control device of stream, the drive control device can control the side of each leading in the A phase windings, B phase windings and C phase windings
To with unidirectional current of different sizes so that the rotor is produced carry out positioning heating after the rotation of predetermined angle, after positioning heating,
The drive control device can control the unidirectional current that the A phase windings, B phase windings and C phase windings be passed through change direction and size,
So that the rotor is rotated further in same direction after the predetermined angle carries out positioning heating.
Preferably, the predetermined angle is 60 °.
Preferably, in six heating cycles that the rotor often rotates one week, the A phase windings, B phase windings and C phases around
The unidirectional current that group is passed through is：
In table, I represents the forward current of default size, and 0.5*I represents the forward current of 0.5 times of described default size ,-
I represents the reverse current of the default size, and -0.5*I represents the reverse current of 0.5 times of described default size.
Preferably, in six heating cycles that the rotor often rotates one week, the A phase windings, B phase windings and C phases around
The unidirectional current that group is passed through is：
In table, I represents the forward current of default size, and-I represents the reverse current of the default size, and 0 representative is not passed through
Electric current.
Preferably, the drive control device controls the rotor at least carries out two weeks rotating heating.
This utility model additionally provides a kind of compressor, including electric machine control system, and the electric machine control system is for as above
Electric machine control system described in any one.
In the technical scheme that this utility model is provided, before electric motor starting, by A of the drive control device to stator winding
Phase winding, B phase windings and C phase windings apply respectively unidirectional current so that stator winding produces the magnetic field of specific direction, the magnetic of rotor
The magnetic field that field produces with stator winding attracts each other, after the magnetic direction of stator determines, then the magnetic direction of the rotor being attracted
It is determined that.In addition, the sense of current and size for changing stator winding can be passed through, change the magnetic direction that stator winding is produced, so as to
Rotor magnetic pole direction is set to be positioned after changing under the sucking action of stator winding, and identical turn of each rotation direction of rotor
Dynamic angle is equal, by this kind of current electrifying mode, can uniformly preheat the permanent magnet of each winding and rotor, and then can avoid
The problem of permanent magnet demagnetization.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is that the resultant magnetic field direction of A phase windings, B phase windings and C phase windings in this utility model the first embodiment shows
It is intended to；
Fig. 2 is the current diagram of A phase windings, B phase windings and C phase windings in this utility model the first embodiment；
Fig. 3 is that the resultant magnetic field direction of A phase windings, B phase windings and C phase windings in second embodiment of this utility model shows
It is intended to；
Fig. 4 is drive control device schematic diagram in this utility model embodiment.
Specific embodiment
The core of this specific embodiment is to provide a kind of electric machine control system, and it can solve the problem that the permanent magnet of motor holds
The problem easily demagnetized.The core of this specific embodiment also resides in a kind of compressor including above-mentioned electric machine control system of offer.
Hereinafter, embodiment is illustrated referring to the drawings.Additionally, embodiments illustrated below is not to described in claim
Utility model content rise any restriction effect.In addition, the full content of the composition represented by example below is not limited to conduct
Necessary to the solution of the utility model described in claim.
The electric machine control system that the present embodiment is provided, including stator winding, rotor and drive control device, wherein stator around
Group includes A phase windings 11, B phase windings 12 and C phase windings 13, and rotor includes permanent magnet.Drive control device can control the A phases
Direction and unidirectional current of different sizes are each led in winding 11, B phase windings 12 and C phase windings 13, specifically can be such as institute in Fig. 4
Show, by controlling switch a, a ', b, b ', c, c ' current control that is capable of achieving to each winding.
In the present embodiment before electric motor starting, by drive control device to A phase windings 11, B phase windings 12 and C phase windings
13 apply DC current, and the DC current will be heated to stator winding, while carrying out positioning heating to the permanent magnet of rotor.
Unidirectional current is applied respectively to the A phase windings 11 of stator winding, B phase windings 12 and C phase windings 13 additionally by drive control device, is made
The magnetic field that stator winding produces specific direction is obtained, the magnetic field that the magnetic field of rotor produces with stator winding attracts each other, the magnetic of stator
After field direction determines, then the magnetic direction of the rotor being attracted determines.Every time after heating, the electric current for changing stator winding can be passed through
Direction and size, change the magnetic direction that stator winding is produced, so as to make rotor magnetic pole side under the sucking action of stator winding
Positioned to after change, and the identical rotational angle of each rotation direction of rotor is equal, by this kind of current electrifying mode, can
The permanent magnet of uniform preheating rotor, and then the problem of permanent magnet demagnetization can be avoided.
In the present embodiment, because rotor was rotated in one 360 degree electric cycles, the method that three-phase windings are powered is 6, rotor
The position of positioning only has 6, therefore, in the present embodiment, it is heated to rotor from starting positioning in rotor and is rotated by 360 ° angle, altogether
Be divided into 6 different positions carries out positioning heating to rotor.
In the first embodiment of the present utility model, in six heating cycles that the rotor often rotates one week, A phases around
The unidirectional current that group 11, B phase windings 12 and C phase windings 13 is passed through is such as table 1 below：
Table 1
In table 1, I represents the forward current of default size, and 0.5*I represents the forward direction electricity of 0.5 times of described default size
Stream,-I represents the reverse current of the default size, and -0.5*I represents the reverse current of 0.5 times of described default size.
Wherein, first time stator winding and permanent magnet are preheated：A phase windings 11, B phase windings 12 and the three-phase of C phase windings 13 around
The step mode of the group such as heating cycle 1 in Fig. 1, the magnetomotive direction of synthesis of three-phase windings with A phase windings magnetomotive force side
To so magnetomotive force direction of the direction of the magnetic pole N of rotor with A phase windings 11, three-phase windings and rotor of the electric current to stator
Permanent magnet heated.
Second stator winding and permanent magnet are preheated：Heating cycle 2 in the step mode of three-phase windings such as Fig. 1, rotor
Magnetic pole N direction with three-phase stator winding the magnetomotive direction of synthesis, the electric current to three-phase stator winding and rotor forever
Magnet is heated.
Third time stator winding and permanent magnet are preheated：Heating cycle 3 in the step mode of three-phase windings such as Fig. 1, rotor
Magnetic pole N direction with three-phase stator winding the magnetomotive direction of synthesis, the electric current to three-phase stator winding and rotor forever
Magnet is heated.
4th stator winding and permanent magnet are preheated：Heating cycle 4 in the step mode of three-phase windings such as Fig. 1, rotor
Magnetic pole N direction with three-phase stator winding the magnetomotive direction of synthesis, the electric current to three-phase stator winding and rotor forever
Magnet is heated.
5th stator winding and permanent magnet are preheated：Heating cycle 5 in the step mode of three-phase windings such as Fig. 1, rotor
Magnetic pole N direction with three-phase stator winding the magnetomotive direction of synthesis, the electric current to three-phase stator winding and rotor forever
Magnet is heated.
6th stator winding and permanent magnet are preheated：Heating cycle 6 in the step mode of three-phase windings such as Fig. 1, rotor
Magnetic pole N direction with three-phase stator winding the magnetomotive direction of synthesis, the electric current is to three-phase stator winding and rotor magnetic pole
Heated.
Rotor is heated to rotor and is rotated by 360 ° electrical angle from starting positioning.Often leading to tertiary current can cause the three of stator
Phase winding preheating is uniform, and often leading to two primary currents can cause the permanent magnet different magnetic poles of rotor to preheat uniformly, can by 6 heating
So that the temperature of the permanent magnet different magnetic poles of the temperature of three-phase stator winding and rotor is uniform.
It should be noted that unidirectional current will be passed through in three-phase windings in the present embodiment, rotor fixed position on the one hand can be played
Effect, on the other hand can reduce the switching loss of drive control device.
In the present embodiment, it is heated to rotor from starting positioning in rotor and is rotated by 360 ° electrical angle, 6 different positioning adds
The angle of hot location interval is equal, so the angle for preheating rotor rotation twice in front and back is 60 degree of electrical angles, because rotor turns
Dynamic 60 degree, twice the different magnetic poles of rotor and the locus of stator winding are identical before and after can causing, it is ensured that rotor
The temperature of permanent magnet different magnetic poles is uniform.
In the preferred version of the present embodiment, it is heated to rotor from starting positioning in rotor and is rotated by 360 ° electrical angle, 6 is not
The time span that same positioning heating location passes through electric current is identical, because the electric current in winding is bigger with conduction time more
Long, the temperature of winding is higher, so making the current time of 6 energizations identical, can cause the temperature of three-phase stator winding and turn
The more uniform temperature of sub- different magnetic poles.
It is passed through such as the electric current in table 1 to each winding according to the scheme in the first embodiment, after heating to rotor,
Winding temperature rise effect is as shown in table 2 below：
Table 2
By table 2, after six winding preheatings are completed in this way, the uniform preheating of three-phase windings is realized.
Through the scheme of the first embodiment, it is passed through as after the electric current in table 1 to each winding, the permanent magnetism body temperature of rotor
Ascending effect is as shown in table 3 below：
Table 3
As can be seen that completing in this way after six winding preheatings, the uniform preheating of rotor different magnetic poles is realized.
In second embodiment of the present utility model, can be with six heating cycles that rotor often rotates one week, A
Phase winding 11, B phase windings 12 and C phase windings 13 are passed through the unidirectional current in table 4 below such as：
Table 4
In table 4, I represents the forward current of default size, and-I represents the reverse current of the default size, 0 represent it is obstructed
Enter electric current.
The electric current being passed through in table 4 is heated to rotor, equally ensure that the permanent magnet to three-phase windings and rotor
Two-stage is uniformly heated.
In addition, in this specific embodiment, can by according to table 1 or table 4 be passed through electric current in the way of, according to first to the 6th
Individual circulating-heating heating cycle, till three-phase windings and permanent magnet are heated to into preset temperature.
This specific embodiment additionally provides a kind of compressor including above-mentioned electric machine control system, is arranged such, this reality
The compressor of example offer is provided, the problem that the permanent magnet of motor easily demagnetizes is can solve the problem that.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.Various modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case of without departing from spirit or scope of the present utility model.Cause
This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (6)
1. a kind of electric machine control system, including stator winding and rotor, the stator winding includes A phase windings (11), B phase windings
(12) and C phase windings (13), the rotor includes permanent magnet, it is characterised in that also include for controlling the stator winding
The drive control device of electrical current, the drive control device can control the A phase windings (11), B phase windings (12) and C phases around
Direction and unidirectional current of different sizes are each led in group (13), so as to carry out determining after the rotation of rotor generation predetermined angle
Position heating, after positioning heating, the drive control device can control the A phase windings (11), B phase windings (12) and C phase windings
(13) unidirectional current that is passed through changes direction and size, so that the rotor is rotated further in same direction after the predetermined angle
Carry out positioning heating.
2. electric machine control system as claimed in claim 1, it is characterised in that the predetermined angle is 60 °.
3. electric machine control system as claimed in claim 2, it is characterised in that the rotor often rotates six heating weeks of one week
Interim, the unidirectional current that the A phase windings (11), B phase windings (12) and C phase windings (13) are passed through is：
In table, I represents the forward current of default size, and 0.5*I represents the forward current of 0.5 times of described default size ,-I generations
The reverse current of size is preset described in table, -0.5*I represents the reverse current of 0.5 times of described default size.
4. electric machine control system as claimed in claim 2, it is characterised in that the rotor often rotates six heating weeks of one week
Interim, the unidirectional current that the A phase windings (11), B phase windings (12) and C phase windings (13) are passed through is：
In table, I represents the forward current of default size, and-I represents the reverse current of the default size, and 0 representative is not passed through electricity
Stream.
5. the electric machine control system as described in claim 3 or 4, it is characterised in that the drive control device controls the rotor
At least carry out two weeks rotating heating.
6. a kind of compressor, including electric machine control system, it is characterised in that the electric machine control system is such as claim 1-5
Electric machine control system described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620838976.0U CN206180917U (en) | 2016-08-03 | 2016-08-03 | Motor control system , compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620838976.0U CN206180917U (en) | 2016-08-03 | 2016-08-03 | Motor control system , compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206180917U true CN206180917U (en) | 2017-05-17 |
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ID=58674307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620838976.0U Active CN206180917U (en) | 2016-08-03 | 2016-08-03 | Motor control system , compressor |
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| Country | Link |
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| CN (1) | CN206180917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160615A (en) * | 2016-08-03 | 2016-11-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Electric machine control system, compressor and motor heating starting method |
| CN107246392A (en) * | 2017-05-31 | 2017-10-13 | 青岛海尔空调器有限总公司 | It is a kind of to reduce the control method of compressor preheating noise |
-
2016
- 2016-08-03 CN CN201620838976.0U patent/CN206180917U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160615A (en) * | 2016-08-03 | 2016-11-23 | 珠海格力节能环保制冷技术研究中心有限公司 | Electric machine control system, compressor and motor heating starting method |
| CN107246392A (en) * | 2017-05-31 | 2017-10-13 | 青岛海尔空调器有限总公司 | It is a kind of to reduce the control method of compressor preheating noise |
| CN107246392B (en) * | 2017-05-31 | 2019-03-01 | 青岛海尔空调器有限总公司 | A kind of control method reducing compressor preheating noise |
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