CN108288939A - Compressor and refrigeration equipment - Google Patents
Compressor and refrigeration equipment Download PDFInfo
- Publication number
- CN108288939A CN108288939A CN201810308110.2A CN201810308110A CN108288939A CN 108288939 A CN108288939 A CN 108288939A CN 201810308110 A CN201810308110 A CN 201810308110A CN 108288939 A CN108288939 A CN 108288939A
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- magneto
- compressor
- rotating speed
- frequency converter
- permanent magnet
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 58
- 230000005389 magnetism Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical group 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 8
- 230000007704 transition Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
- H02P25/184—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor speed is changed by switching from a delta to a star, e.g. wye, connection of its windings, or vice versa
-
- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Ac Motors In General (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention provides a kind of compressor and refrigeration equipments.Wherein, compressor is used for refrigeration equipment, and refrigeration equipment includes connection component and the frequency converter compressor being connected with one end of connection component includes：First shell；Magneto is arranged in first shell, connects the other end of connection component；The critical speed of magneto is n0；The preset rotation speed of magneto is n '；When the rotating speed a of magneto is located in the range of n0 n '≤a ＜ n0, the line voltage virtual value of frequency converter output is U1；When the rotating speed a of magneto is located in the range of n0 ＜ a≤n0+n ', the line voltage virtual value of frequency converter output is U2；The relationship of U1 and U2 meets：1.1U2≤U1≤1.6U2；Wherein, the value range of n ' is 0r/s ＜ n '≤1r/s.The compressor of the present invention ensure that product has higher performance in full frequency band.
Description
Technical field
The present invention relates to compressor manufacturing technical fields, in particular to a kind of compressor and refrigeration equipment.
Background technology
Compressor is important and core the component of refrigeration equipment, and the relevant technologies propose the technical solution of winding switching,
I.e.：For the motor of compressor in low-speed running, the stator winding of compressor is in star-like connection, and the motor of compressor is running at high speed
When, the stator winding connection triangular in shape of compressor.In the related technology, it is not directed to the technical solution of switching critical speed, if
Critical speed design is improper, and being likely to result in the impact when converting the connection type of winding, greatly, energy consumption is big, and clamping stagnation easily occurs,
Seriously affect the working efficiency of product, poor user experience.
Invention content
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the first aspect of the present invention proposes a kind of compressor.
The second aspect of the present invention proposes a kind of refrigeration equipment.
In view of this, the first aspect of the present invention proposes a kind of compressor, it is used for refrigeration equipment, refrigeration equipment to include connecting
Connected components and the frequency converter compressor being connected with one end of connection component include：First shell；Magneto is arranged first
In shell, the other end of connection component is connected；The critical speed of magneto is n0；The preset rotation speed of magneto is n '；When
When the rotating speed a of magneto is located in the range of n0-n '≤a ＜ n0, the line voltage virtual value of frequency converter output is U1；Work as permanent magnetism
When the rotating speed a of motor is located in the range of n0 ＜ a≤n0+n ', the line voltage virtual value of frequency converter output is U2；The pass of U1 and U2
System meets：1.1U2≤U1≤1.6U2；Wherein, the value range of n ' is 0r/s ＜ n '≤1r/s.
A kind of critical speed of the magneto of compressor provided by the invention is n0, when the winding of magneto is in star
When connection, the rotating speed of magneto is less than n0, and when the winding of magneto is in Angle connection, the rotating speed of magneto is more than
N0 so that when the rotating speed of magneto is less than critical speed n0, and when the rotating speed of very close critical speed n0, that is, Permanent Magnet and Electric
When the rotating speed a of machine is located in the range of n0-n '≤a ＜ n0, the line voltage virtual value of frequency converter output at this time is U1, meanwhile, make
The rotating speed of proper magneto is more than critical speed n0, and when the rotating speed of very close critical speed n0, that is, magneto turns
When fast a is located in the range of n0 ＜ a≤n0+n ', the line voltage virtual value of frequency converter output at this time is U2, is made by rationally controlling
The relationship for obtaining U1 and U2 meets：1.1U2≤U1≤1.6U2, that is to say, that so that U1 and U2 meets above-mentioned relation, and then ensures
For the rotating speed of magneto when very close to critical speed, winding has certain weak magnetic depth in the magneto of star connection,
Winding does not enter in the magneto of angular connection in the weak magnetic region, to ensure that product has higher property in full frequency band
Energy；Further, by the way that preset rotation speed is rationally arranged, it is 0r/s ＜ n '≤1r/s to be allowed to value range, and then is defined close
The range of the critical speed of magneto：N0-n '≤a ＜ n0 and n0 ＜ a≤n0+n ' so that the connection of the winding of magneto
If mode switches in this region, switching is more smooth, can greatly reduce impact, transition is more stable, improves
The operational energy efficiency of product improves the performance and the market competitiveness of product.
According to the above-mentioned compressor of the present invention, there can also be following additional technical feature：
In the above-mentioned technical solutions, it is preferable that when compressor is under identical Suck and exhaust pressure, when the rotating speed of magneto
When a is located in the range of n0-n '≤a ＜ n0, the line current of frequency converter output is I1；When the rotating speed a of magneto is located at n0 ＜ a
When in the range of≤n0+n ', the line current of frequency converter output is I2；The relationship of I1 and I2 meets：I2≤1.7I1.
In the technical scheme, when the rotating speed of magneto is less than critical speed n0, and very close critical speed n0
When rotating speed, that is, when the rotating speed a of magneto is located in the range of n0-n '≤a ＜ n0, the line current of frequency converter output is I1, when
The rotating speed of magneto is more than critical speed n0, and when the rotating speed of very close critical speed n0, that is, the rotating speed a of magneto
When in the range of n0 ＜ a≤n0+n ', the line current of frequency converter output is I2 to be made by the way that the relationship of I1 and I2 is rationally arranged
Satisfaction：I2≤1.7I1, and then the rotating speed of guarantee magneto, when close to critical speed, winding is in the permanent magnetism of star connection
Motor has certain weak magnetic depth, and winding does not enter in the magneto of angular connection in the weak magnetic region, to ensure to produce
Product have higher performance in full frequency band, and ensure that the winding of magneto connection type switching without clamping stagnation, switching ground
It is more smooth, it ensure that the stationarity of transition.
In any of the above-described technical solution, it is preferable that when compressor is under identical Suck and exhaust pressure, when magneto
When rotating speed a is located in the range of n0-n '≤a ＜ n0, the input power of compressor is P1；When the rotating speed a of magneto is located at n0
When in the range of ＜ a≤n0+n ', the input power of compressor is P2；The relationship of P1 and P2 meets：0.95P2≤P1≤
1.05P2。
In the technical scheme, when the rotating speed of magneto is less than critical speed n0, and very close critical speed n0
When rotating speed, that is, when the rotating speed a of magneto is located in the range of n0-n '≤a ＜ n0, the input power of compressor is P1, when forever
The rotating speed of magneto is more than critical speed n0, and when the rotating speed of very close critical speed n0, that is, the rotating speed of magneto a
When in the range of n0 ＜ a≤n0+n ', the input power of compressor is P2, by the way that the relationship of P1 and P2 is rationally arranged, is allowed to full
Sufficient 0.95P2≤P1≤1.05P2, that is, reduce and switch over front and back difference power to the winding connection of magneto, protect
The steady of properties of product transition of the rotating speed a of magneto in the range of n0-n '≤a ＜ n0 and n0 ＜ a≤n0+n ' is demonstrate,proved
Property, it ensure that the stability and reliability that product uses.
In any of the above-described technical solution, it is preferable that magneto includes：Stator is provided with stator core and is wrapped in
Winding on stator core；Rotor is provided with rotor core and the permanent magnet on rotor core.
In the technical scheme, stator includes stator core and winding, by the way that winding is wrapped on stator core, stator
It is stationary in compressor operating, when electric current is after winding, stator will produce magnetic field；Rotor include rotor core and
The magnetic pole of permanent magnet, permanent magnet will not change, by being arranged permanent magnet on rotor core so that in compressor operating,
Stator generates rotating excitation field, and rotor by magnetic force line cutting and then generates output current in rotating excitation field, is the operating of compressor
Provide power.
In any of the above-described technical solution, it is preferable that permanent magnet is rare-earth permanent magnet；Or permanent magnet is iron oxygen permanent magnet.
In any of the above-described technical solution, it is preferable that rotor core includes slot, the quantity of slot be it is at least one, entirely
Portion's slot is along the circumferentially-spaced distribution of rotor core, and permanent magnet setting is in slot.
In the technical scheme, a kind of permanent magnet plan of establishment of rotor is specifically defined.By adding on rotor core
Work slot can provide installation site for permanent magnet, be convenient for the positioning and assembly of permanent magnet.Meanwhile the structure setting processes work
Sequence is few, and processing technology is simple, and production cost is low, is convenient for volume production.
In any of the above-described technical solution, it is preferable that permanent magnet is cylindrical in shape, and permanent magnet is set in the outer wall of rotor core
On.
In the technical scheme, a kind of permanent magnet plan of establishment of rotor is specifically defined.It is set in and is turned by permanent magnet
On the outer wall of sub- iron core, rotor core plays the role of support, is convenient for the positioning and assembly of permanent magnet.Meanwhile the structure setting
Manufacturing procedure is few, and processing technology is simple, and production cost is low, is convenient for volume production.
The second aspect of the present invention proposes a kind of refrigeration equipment, including：Second shell；Frequency converter is arranged in second shell
In vivo；Compressor as described in any technical solution in first aspect, compressor are arranged in second shell；Connection component, if
It sets in second shell, is separately connected frequency converter and compressor；Controller is arranged in second shell, and connection connection component becomes
Frequency device and compressor, for controlling frequency converter so that the relationship of U1 and U2 meets：1.1U2≤U1≤1.6U2.
Refrigeration equipment provided by the invention includes：Second shell, frequency converter, compressor, connection component and controller.Pass through
Controller is set so that the mode of connection of the winding of magneto switches within the scope of n0 ＜ a≤n0+n ' and n0-n '≤a ＜ n0
When, controller controls frequency converter so that line voltage the virtual value U1 and U2 of frequency converter output meet 1.1U2≤U1≤1.6U2's
Relationship, and then the rotating speed of guarantee magneto, when very close to critical speed, winding has one in the magneto of star connection
Fixed weak magnetic depth, winding does not enter in the magneto of angular connection in the weak magnetic region, to ensure product in full frequency band
With higher performance, and ensure that the winding of magneto connection type switching without clamping stagnation, switch more smooth, ensure
The stationarity of transition.
In the above-mentioned technical solutions, it is preferable that refrigeration equipment further includes：Detection device is arranged in second shell, connection
Controller and compressor, the rotating speed for detecting magneto.
In the technical scheme, by the way that detection device is arranged in second shell, permanent magnetism is detected in real time using detection device
The rotating speed of motor, judges whether the rotating speed of magneto enters or leave n0 ＜ a≤n0+n ' and n0-n '≤a ＜ n0 models in order to control
It encloses, provides real time data, accurately and timely control other component acts convenient for controller, to ensure that product used
Reliability and accuracy.
In any of the above-described technical solution, it is preferable that connection component includes：Switching switch, for realizing magneto
Winding is in star-like connection and in the switching of Angle connection.
In the technical scheme, it by the way that switching switch is arranged, is switched on or is closed using switching to realize Permanent Magnet and Electric
The winding of machine and the connection status of frequency converter, and then realize that the winding of magneto is in the winding of star-like connection and magneto
Angle connection.Meanwhile the structure setting is easy to process, installation and subsequent dismounting, replacement, interchangeability are strong.
The additional aspect and advantage of the present invention will become apparent in following description section, or practice through the invention
Recognize.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram of the frequency converter of first embodiment of the invention, magneto and switching switch；
Fig. 2 is the structural schematic diagram of the frequency converter of second embodiment of the invention, magneto and switching switch；
Fig. 3 is the structural schematic diagram of the frequency converter of third embodiment of the invention, magneto and switching switch；
Fig. 4 is the magneto efficiency of one embodiment of the invention with the schematic diagram of rotation speed change；
Fig. 5 is the sectional view of the magneto of one embodiment of the invention；
Fig. 6 is the sectional view of the compressor of one embodiment of the invention.
Wherein, the correspondence in Fig. 1 to Fig. 6 between reference numeral and component names is：
1 compressor, 10 frequency converters, 20 magnetoes, 202 stators, 204 stator cores, 206 windings, 208 rotors, 210 turns
Sub- iron core, 212 permanent magnets, 214 first connectors, 216 tail connectors, 30 second shells, 40 switching switches.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The compressor 1 described according to some embodiments of the invention and refrigeration equipment are described referring to Fig. 1 to Fig. 6.
As shown in Figure 1 to Figure 3, the embodiment of first aspect present invention proposes a kind of compressor 1, is used for refrigeration equipment,
Refrigeration equipment includes connection component and 10 compressor 1 of the frequency converter being connected with one end of connection component includes：First shell；Forever
Magneto 20 is arranged in first shell, connects the other end of connection component；The critical speed of magneto 20 is n0；Permanent magnetism
The preset rotation speed of motor 20 is n '；When the rotating speed a of magneto 20 is located in the range of n0-n '≤a ＜ n0, frequency converter 10 is defeated
The line voltage virtual value gone out is U1；When the rotating speed a of magneto 20 is located in the range of n0 ＜ a≤n0+n ', frequency converter 10 is defeated
The line voltage virtual value gone out is U2；The relationship of U1 and U2 meets：1.1U2≤U1≤1.6U2；Wherein, the value range of n ' is 0r/
S ＜ n '≤1r/s.
A kind of critical speed of the magneto 20 of compressor 1 provided by the invention is n0, when the winding of magneto 20
206 when being in star-like connection, and the rotating speed of magneto 20 is less than n0, when the winding 206 of magneto 20 is in Angle connection, permanent magnetism
The rotating speed of motor 20 is more than n0 so that when the rotating speed of magneto 20 is less than critical speed n0, and very close critical speed n0
Rotating speed when, that is, when the rotating speed a of magneto 20 is located in the range of n0-n '≤a ＜ n0, frequency converter 10 exports at this time line
Voltage effective value is U1, simultaneously so that when the rotating speed of magneto 20 is more than critical speed n0, and very close critical speed n0
Rotating speed when, that is, when the rotating speed a of magneto 20 is located in the range of n0 ＜ a≤n0+n ', frequency converter 10 exports at this time line
Voltage effective value is U2, by rationally controlling so that the relationship of U1 and U2 meets：1.1U2≤U1≤1.6U2, that is to say, that make
It obtains U1 and U2 and meets above-mentioned relation, and then the rotating speed of guarantee magneto 20, when very close to critical speed, winding 206 is in star
There is the magneto 20 of connection certain weak magnetic depth, winding 206 not to enter the weak magnetic in the magneto 20 of angular connection
In region, to ensure that product has higher performance in full frequency band；Further, it by the way that preset rotation speed is rationally arranged, is allowed to
Value range is 0r/s ＜ n '≤1r/s, and then defines the range of the critical speed close to magneto 20：N0-n '≤a ＜
N0 and n0 ＜ a≤n0+n ' so that if the connection type of the winding 206 of magneto 20 switches in this region, cut
It changes more smooth, can greatly reduce impact, transition is more stable, improves the operational energy efficiency of product, improves the use of product
Performance and the market competitiveness.Specifically, the electric current of power supply output flows into frequency converter 10 by conducting wire, so that 10, frequency converter
Electric energy is conveyed to compressor 1 by connection component by way of changing supply frequency according to specific actual use demand.
In specific embodiment, as shown in Figure 1, switching switch 40 quantity be 6, respectively S1, S2, S3, S4, S5 and
S6.Magneto 20 is powered by frequency converter 10, and 6 switching switches 40 are arranged in connection component.As shown in Fig. 2, when S1,
S2 and S3 conductings, when S4, S5 and S6 are disconnected, the winding 206 of magneto 20 is in star-like connection.As shown in figure 3, as S1, S2 and
S3 is disconnected, and when S4, S5 and S6 are connected, the winding 206 of magneto 20 is in Angle connection.Wherein, as shown in Figure 1 to Figure 3, it marks
Line voltage virtual value U, U1 and U2 that the flow direction and frequency converter 10 of portion of electrical current I, I1 and I2 for being exported by frequency converter 10 export.
In specific embodiment, as shown in figure 4, arrow indicates, 20 shaft of magneto gradually increases and magneto 20 is imitated
The critical speed in the gradual increased direction of rate, magneto 20 is n0, when the winding 206 of magneto 20 is in star-like connection,
The rotating speed of magneto 20 is less than n0, and when the winding 206 of magneto 20 is in Angle connection, the rotating speed of magneto 20 is more than
n0.As seen from the figure, the efficiency curve of the magneto 20 of star-like connection winding 206 is in drop mode when critical speed n0, faces
The efficiency curve of the magneto 20 of Angle connection winding 206 is in ascending fashion when boundary rotating speed n0.When star-like connection, it is assumed that forever
When the rotating speed of magneto 20 is more than or equal to n1, the efficiency of magneto 20 declines with the rising of rotating speed, and magneto 20
Rotating speed be critical speed n0 when being 1.1n1 lower limiting value.When Angle connection, it is assumed that the rotating speed of magneto 20 is more than or equal to n2
When, the efficiency of magneto 20 declines with the rising of rotating speed, and when rotating speed of magneto 20 is 0.9n2 is critical speed
The upper limit value of n0.To ensure near critical speed n0, with certain weak magnetic depth when star-like connection, and in Angle connection
The range that rotating speed with certain magneto 20 rises without weak magnetic.Therefore comprehensive selection 1.1n1≤n0≤0.9n2.
In specific embodiment, as shown in Figure 1 to Figure 3, it is assumed that model of the rotating speed in n0-n '≤a ＜ n0 and n0 ＜ a≤n0+n '
Enclose permanent magnet motor 20 not weak magnetic when, U1 ≈ 1.732U2；Assuming that model of the rotating speed in n0-n '≤a ＜ n0 and n0 ＜ a≤n0+n '
When enclosing 20 equal weak magnetic of permanent magnet motor, U1 ≈ U2.For take into account product full frequency band comprehensive performance, according to above-mentioned comprehensive selection：
1.1n1≤n0≤0.9n2, to obtain the optimal control range of 1.1U2≤U1≤1.6U2.
In one embodiment of the invention, it is preferable that when compressor 1 is under identical Suck and exhaust pressure, work as Permanent Magnet and Electric
When the rotating speed a of machine 20 is located in the range of n0-n '≤a ＜ n0, the line current that frequency converter 10 exports is I1；When magneto 20
When rotating speed a is located in the range of n0 ＜ a≤n0+n ', the line current that frequency converter 10 exports is I2；The relationship of I1 and I2 meets：I2
≤1.7I1。
In this embodiment, when the rotating speed of magneto 20 is less than critical speed n0, and very close critical speed n0
When rotating speed, that is, when the rotating speed a of magneto 20 is located in the range of n0-n '≤a ＜ n0, the line current that frequency converter 10 exports is
I1, when the rotating speed of magneto 20 is more than critical speed n0, and when the rotating speed of very close critical speed n0, that is, magneto
When 20 rotating speed a is located in the range of n0 ＜ a≤n0+n ', the line current that frequency converter 10 exports is I2, by be rationally arranged I1 and
The relationship of I2 is allowed to meet：I2≤1.7I1, so ensure magneto 20 rotating speed when close to critical speed, winding 206
In the magneto 20 of star connection there is certain weak magnetic depth, winding 206 not to enter in the magneto 20 of angular connection
In the weak magnetic region, to ensure that product has higher performance in full frequency band, and ensure that the winding 206 of magneto 20
The switching of connection type switches more smooth without clamping stagnation, ensure that the stationarity of transition.
In specific embodiment, when 20 weak magnetic of magneto controls, electric current is divided into Iq and Id.The angle that Id and Iq is arranged is α,
Then Iq=I × cos α.When the rotating speed a of magneto 20 is located in the range of n0-n '≤a ＜ n0, α >=10 °；Magneto 20
When rotating speed a is located in the range of n0 ＜ a≤n0+n ', 10 ° of α ≈.Compressor 1 is under identical Suck and exhaust pressure, n0-n '≤a ＜
In the range of n0 and n0 ＜ a≤n0+n ' not weak magnetic when, I2=1.732I1.Under the conditions of meeting above-mentioned weak magnetic, I2 can be obtained
≤1.7I1。
In one embodiment of the invention, it is preferable that when compressor 1 is under identical Suck and exhaust pressure, work as Permanent Magnet and Electric
When the rotating speed a of machine 20 is located in the range of n0-n '≤a ＜ n0, the input power of compressor 1 is P1；When turning for magneto 20
When fast a is located in the range of n0 ＜ a≤n0+n ', the input power of compressor 1 is P2；The relationship of P1 and P2 meets：0.95P2≤
P1≤1.05P2。
In this embodiment, when the rotating speed of magneto 20 is less than critical speed n0, and very close critical speed n0
When rotating speed, that is, when the rotating speed a of magneto 20 is located in the range of n0-n '≤a ＜ n0, the input power of compressor 1 is P1,
When the rotating speed of magneto 20 is more than critical speed n0, and when the rotating speed of very close critical speed n0, that is, magneto 20
When rotating speed a is located in the range of n0 ＜ a≤n0+n ', the input power of compressor 1 is P2, by the pass that P1 and P2 is rationally arranged
System, is allowed to meet 0.95P2≤P1≤1.05P2, that is, reduce and switch over 206 connection type of winding of magneto 20
Front and back difference power ensure that productions of the rotating speed a of magneto 20 in the range of n0-n '≤a ＜ n0 and n0 ＜ a≤n0+n '
The stationarity of moral character energy transition ensure that stability and reliability that product uses.
In specific embodiment, the comprehensive performance of the full frequency band of product is considered, the input power of compressor 1 is at rotating speed
In the difference within the scope of n0-n '≤a ＜ n0 and n0 ＜ a≤n0+n ' two within 5%, especially closer to more excellent.
In specific embodiment, the relationship of U1 and U2 meet：1.1U2≤U1≤1.6U2, and the relationship of I1 and I2 meets：I2
≤ 1.7I1, and the relationship of P1 and P2 meets：0.95P2≤P1≤1.05P2.
In one embodiment of the invention, it is preferable that as shown in figure 5, magneto 20 includes：Stator 202, is provided with
Stator core 204 and the winding 206 being wrapped on stator core 204；Rotor 208 is provided with rotor core 210 and is located at rotor
Permanent magnet 212 on iron core 210.
In this embodiment, stator 202 includes stator core 204 and winding 206, by the way that winding 206 is wrapped in stator
On iron core 204, stator 202 is stationary when compressor 1 is run, and when electric current is after winding 206, stator 202 can produce
Magnetisation field；Rotor 208 includes rotor core 210 and permanent magnet 212, and the magnetic pole of permanent magnet 212 will not change, by by permanent magnet
212 are arranged on rotor core 210 so that when compressor 1 works, stator 202 generates rotating excitation field, and rotor 208 is rotating
Output current is generated by magnetic force line cutting in turn in magnetic field, the operating for compressor 1 provides power.
In specific embodiment, as shown in figure 5, magneto 20 is 9 slot, 6 pole structure.By taking the series connection of every phase winding 206 as an example,
Per phase winding 206, there are one first connectors 214 and a tail connector 216, first connector 214 and tail connector 216 to be separately connected extraction for tool
Line.According to practical application, the connector per phase winding 206 can be 2k (k=1,2 ...).
In one embodiment of the invention, it is preferable that permanent magnet 212 is rare-earth permanent magnet；Or permanent magnet 212 is iron oxygen
Permanent magnet.
In one embodiment of the invention, it is preferable that rotor core 210 includes slot, and the quantity of slot is at least one
A, whole slots are along the circumferentially-spaced distribution of rotor core 210, and the setting of permanent magnet 212 is in slot.
In this embodiment, a kind of 212 plan of establishment of permanent magnet of rotor 208 is specifically defined.By in rotor core
Slot is processed on 210, can is that permanent magnet 212 provides installation site, is convenient for the positioning and assembly of permanent magnet 212.Meanwhile the knot
Structure setting manufacturing procedure is few, and processing technology is simple, and production cost is low, is convenient for volume production.
In one embodiment of the invention, it is preferable that permanent magnet 212 is cylindrical in shape, and permanent magnet 212 is set in rotor core
On 210 outer wall.
In this embodiment, a kind of 212 plan of establishment of permanent magnet of rotor 208 is specifically defined.By 212 sets of permanent magnet
It is located on the outer wall of rotor core 210, rotor core 210 plays the role of support, is convenient for the positioning and assembly of permanent magnet 212.
Meanwhile the structure setting manufacturing procedure is few, processing technology is simple, and production cost is low, is convenient for volume production.
As shown in fig. 6, embodiment according to the second aspect of the invention, it is also proposed that a kind of refrigeration equipment, including：Second shell
Body 30；Frequency converter 10 is arranged in second shell 30；Compressor 1 as described in first aspect embodiment, the setting of compressor 1 exist
In second shell 30；Connection component is arranged in second shell 30, is separately connected frequency converter 10 and compressor 1；Controller, if
It sets in second shell 30, connection connection component, frequency converter 10 and compressor 1 make the pass of U1 and U2 for controlling frequency converter
System meets：1.1U2≤U1≤1.6U2.
Refrigeration equipment provided by the invention includes：Second shell 30, frequency converter 10, compressor 1, connection component and control
Device.By the way that controller is arranged so that the mode of connection of the winding 206 of magneto 20 is in n0 ＜ a≤n0+n ' and n0-n '≤a ＜
When switching within the scope of n0, controller controls frequency converter 10 so that line voltage the virtual value U1 and U2 that frequency converter 10 exports meet
The relationship of 1.1U2≤U1≤1.6U2, and then the rotating speed of guarantee magneto 20, when very close to critical speed, winding 206 is in star
The magneto 20 of shape connection has certain weak magnetic depth, and not enter this weak in the magneto 20 of angular connection for winding 206
In magnetic area, to ensure that product has higher performance in full frequency band, and the connection of the winding 206 of magneto 20 ensure that
The switching of mode switches more smooth without clamping stagnation, ensure that the stationarity of transition.
In one embodiment of the invention, it is preferable that refrigeration equipment further includes：Detection device is arranged in second shell
In 30, controller and compressor 1, the rotating speed for detecting magneto 20 are connected.
In this embodiment, by the way that detection device is arranged in second shell 30, permanent magnetism is detected in real time using detection device
The rotating speed of motor 20, judges whether the rotating speed of magneto 20 enters or leave n0 ＜ a≤n0+n ' and n0-n '≤a ＜ in order to control
N0 ranges, provide real time data, and convenient for controller, accurately and timely control other component acts, to ensure that product makes
Reliability and accuracy.
In one embodiment of the invention, it is preferable that as shown in Figure 1, connection component includes：Switch switch 40, is used for
Realize the winding 206 of magneto 20 in star-like connection and in the switching of Angle connection.
In this embodiment, switch 40 is switched by setting, permanent magnetism is realized using being turned on and off for switch 40 is switched
The connection status of the winding 206 and frequency converter 10 of motor 20, and then the winding 206 of realization magneto 20 is in star-like connection and forever
The winding 206 of magneto 20 is in Angle connection.Meanwhile the structure setting it is easy to process, installation and subsequent dismounting, replacement, mutually
It is transsexual strong.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
The terms such as dress ", " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, it can also
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the present invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of compressor is used for refrigeration equipment, the refrigeration equipment includes connection component and one end with the connection component
The frequency converter being connected, which is characterized in that the compressor includes：
First shell；
Magneto is arranged in the first shell, connects the other end of the connection component；
The critical speed of the magneto is n0；
The preset rotation speed of the magneto is n '；
When the rotating speed a of the magneto is located in the range of n0-n '≤a ＜ n0, the line voltage of the frequency converter output has
Valid value is U1；
When the rotating speed a of the magneto is located in the range of n0 ＜ a≤n0+n ', the line voltage of the frequency converter output has
Valid value is U2；
The relationship of the U1 and the U2 meet：1.1U2≤U1≤1.6U2；
Wherein, the value range of the n ' is 0r/s ＜ n '≤1r/s.
2. compressor according to claim 1, which is characterized in that
When the compressor is under identical Suck and exhaust pressure,
When the rotating speed a of the magneto is located in the range of n0-n '≤a ＜ n0, the line current of the frequency converter output is
I1；
When the rotating speed a of the magneto is located in the range of n0 ＜ a≤n0+n ', the line current of the frequency converter output is
I2；
The relationship of the I1 and the I2 meet：I2≤1.7I1.
3. compressor according to claim 1, which is characterized in that
When the compressor is under identical Suck and exhaust pressure,
When the rotating speed a of the magneto is located in the range of n0-n '≤a ＜ n0, the input power of the compressor is P1；
When the rotating speed a of the magneto is located in the range of n0 ＜ a≤n0+n ', the input power of the compressor is P2；
The relationship of the P1 and the P2 meet：0.95P2≤P1≤1.05P2.
4. compressor according to any one of claim 1 to 3, which is characterized in that
The magneto includes：
Stator, the winding for being provided with stator core and being wrapped on the stator core；
Rotor is provided with rotor core and the permanent magnet on the rotor core.
5. compressor according to claim 4, which is characterized in that
The permanent magnet is rare-earth permanent magnet；Or
The permanent magnet is iron oxygen permanent magnet.
6. compressor according to claim 4, which is characterized in that
The rotor core includes slot, and the quantity of the slot is at least one, and all the slot is along the rotor core
Circumferentially-spaced distribution, the permanent magnet is arranged in the slot.
7. compressor according to claim 4, which is characterized in that
The permanent magnet is cylindrical in shape, and the permanent magnet is set on the outer wall of the rotor core.
8. a kind of refrigeration equipment, which is characterized in that including：
Second shell；
Frequency converter is arranged in the second shell；
Compressor as described in any one of claim 1 to 7, the compressor are arranged in the second shell；
Connection component is arranged in the second shell, is separately connected the frequency converter and the compressor；
Controller is arranged in the second shell, connects the connection component, the frequency converter and the compressor, be used for
Control the frequency converter so that the relationship of the U1 and the U2 meet：1.1U2≤U1≤1.6U2.
9. refrigeration equipment according to claim 8, which is characterized in that further include：
Detection device is arranged in the second shell, the controller and the compressor is connected, for detecting the permanent magnetism
The rotating speed of motor.
10. refrigeration equipment according to claim 8, which is characterized in that
The connection component includes：
Switching switch, for realizing the magneto winding in star-like connection in Angle connection switching.
Priority Applications (1)
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| PCT/CN2018/102031 WO2019134375A1 (en) | 2018-01-03 | 2018-08-23 | Compressor and refrigeration equipment |
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| CN201810005049 | 2018-01-03 | ||
| CN2018100050494 | 2018-01-03 |
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| CN108288939B (en) | 2024-06-28 |
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