CN103595263A - Compressor system and method and power supply device of three-phase self-starting permanent magnet synchronous motor - Google Patents
Compressor system and method and power supply device of three-phase self-starting permanent magnet synchronous motor Download PDFInfo
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Abstract
The invention discloses a power supply device of a three-phase self-starting permanent magnet synchronous motor. The power supply device comprises a phase commutation current transformer and a transformer, wherein the phase commutation current transformer is connected with the output end of a first single-phase alternating current, the phase commutation current transformer obtains a second single-phase alternating current according to the first single-phase alternating current, the phase position of the second single-phase alternating current and the phase position of the first single-phase alternating current are orthogonal, and the difference between the amplitude of the second single-phase alternating current and the amplitude of the first single-phase alternating current is less than a preset value; the transformer comprises a first input end and a second input end, the first input end is connected with the phase commutation current transformer, the second input end is connected with the output end of the first single-phase alternating current, the transformer generates a three-phase symmetrical alternating current according to the first single-phase alternating current and the second single-phase alternating current, and the three-phase symmetrical alternating current is provided for the three-phase self-starting permanent magnet synchronous motor. The power supply device can output the high-quality three-phase symmetrical alternating current and is simple in structure and low in cost. The invention further discloses a compressor system and a control method of the compressor system.
Description
Technical field
The present invention relates to Compressor Technology field, particularly a kind of electric supply installation of three-phase self-starting permanent magnet synchronous motor and a kind of compressor assembly of electric supply installation and control method of compressor assembly with this three-phase self-starting permanent magnet synchronous motor.
Background technology
The drive motor for compressor major part of using in the refrigeration plants such as the air-conditioning with fixed rotating speed of existing employing single phase alternating current power supply power supply and refrigerator is monopole asynchronous motor, and the rotating magnetic field generating due to the stator of monopole asynchronous motor is that ellipse magnetic field and the cause that has the loss of mouse cage winding resistance make the efficiency of monopole asynchronous motor lower.
In correlation technique, when the three-phase permanent magnet synchronous motor that use possesses asynchronous starting ability substitutes monopole asynchronous motor as motive drive source in above-mentioned refrigeration plant, due to three-phase permanent magnet synchronous motor when running well without rotor winding loss, the rotating magnetic field that stator generates is simultaneously circular magnetic field, therefore the efficiency of three-phase self-starting permanent magnet synchronous motor is higher than monopole asynchronous motor, is conducive to realize the high efficiency of above-mentioned refrigeration plant.
But the power supply of supplying with three-phase self-starting permanent magnet synchronous motor need to be three-phase symmetrical alternating current, and for above-mentioned single phase alternating current power supply power supply, single-phase alternating current need to be converted to three-phase symmetrical alternating current.The conventional electric supply installation that single phase alternating current power supply can be converted to three-phase symmetrical AC power has two kinds: a kind of is interchange-AC/DC current transformer modulating device; Another kind is the phase shifting equipment that utilizes capacity reactance phase-shift theory to realize.It is good that the first device has dynamic property, the advantage that the quality of power supply is high, but there is the problem that cost is high; The second installation cost is cheap, reliability is high, but has bad dynamic performance, and three-phase output voltage, electric current change shortcoming greatly with the fluctuation of load.Therefore, existingly to the electric supply installation of three-phase permanent magnet synchronous motor, need to improve.
Summary of the invention
Object of the present invention is intended at least solve above-mentioned technological deficiency.
For this reason, first object of the present invention is to propose a kind of electric supply installation of three-phase self-starting permanent magnet synchronous motor, the three-phase symmetrical alternating current that this electric supply installation can outputting high quality, and simple in structure, with low cost.
Second object of the present invention is to propose a kind of compressor assembly.The 3rd object of the present invention is to propose a kind of control method of compressor assembly.
For achieving the above object, the electric supply installation of a kind of three-phase self-starting permanent magnet synchronous motor that first aspect present invention embodiment proposes, comprise: commutation current transformer, described commutation current transformer is connected with the output of the first single-phase alternating current, described commutation current transformer obtains the second single-phase alternating current according to described the first single-phase alternating current, wherein, the quadrature in phase of the phase place of described the second single-phase alternating current and described the first single-phase alternating current, the difference of the amplitude of the amplitude of described the second single-phase alternating current and described the first single-phase alternating current is less than preset value; Transformer, described transformer comprises first input end and the second input, described first input end is connected with described commutation current transformer, described the second input is connected with the output of described the first single-phase alternating current, and described transformer generates three-phase symmetrical alternating current to supply with described three-phase self-starting permanent magnet synchronous motor according to described the first single-phase alternating current and described the second single-phase alternating current.
According to the electric supply installation of the three-phase self-starting permanent magnet synchronous motor of the embodiment of the present invention, only there is the just three-phase symmetrical alternating current of energy outputting high quality of commutation current transformer and transformer, therefore, this electric supply installation is simple in structure, and adopt less switching device, have advantages of with low cost, the quality of power supply good.
According to one embodiment of present invention, described transformer comprises the first voltage transformation unit and the second voltage transformation unit, wherein, described the first voltage transformation unit comprises: the first armature winding, and described the first armature winding is connected with described commutation current transformer by described first input end; The first secondary winding, one end of described the first secondary winding is connected with the first binding post of described three-phase self-starting permanent magnet synchronous motor; Described the second voltage transformation unit comprises: the second armature winding, and described the second armature winding is connected with the output of described the first single-phase alternating current by described the second input; Second subprime winding and for the third time level winding, one end of described second subprime winding is connected with the second binding post of described three-phase self-starting permanent magnet synchronous motor, the other end of described second subprime winding is connected with one end of the described winding of level for the third time, described the level for the third time other end of winding and the 3rd binding post of described three-phase self-starting permanent magnet synchronous motor are connected, and the node between one end of the other end of described second subprime winding and described grade winding for the third time is connected with the other end of described the first secondary winding.
Wherein, the equal turn numbers of the number of turn of described second subprime winding and the described winding of level for the third time, and the number of turn of described the first secondary winding is the number of turn of described second subprime winding or the number of turn of the described winding of level for the third time
doubly, the ratio of the number of turn of the number of turn of described the first armature winding and described the second armature winding is 0.8～0.92:1.
According to one embodiment of present invention, described commutation current transformer comprises: rectifier bridge, and the input of described rectifier bridge is connected with the output of described the first single-phase alternating current, for described the first single-phase alternating current is converted to direct current; Direct current suppresses and voltage regulation unit, and described direct current inhibition and voltage regulation unit are connected with the output of described rectifier bridge, for suppressing described galvanic current break, and described direct current are carried out to voltage stabilizing decoupling zero processing; Inversion unit, described inversion unit suppresses with described direct current and voltage regulation unit is connected; Detection control unit, described detection control unit is connected with described inversion unit with the output of described the first single-phase alternating current, for described the first single-phase alternating current is sampled with formation voltage sampled signal, and to control described inversion unit, export described the second single-phase alternating current according to described voltage sampling signal generation pulse-width modulation PWM signal.
According to one embodiment of present invention, described commutation current transformer also comprises the filter unit being connected between described inversion unit and described first input end.
A kind of compressor assembly that second aspect present invention embodiment proposes, comprising: three-phase self-starting permanent magnet synchronous motor, and described three-phase self-starting permanent magnet synchronous motor comprises rotor and stator, and described stator comprises three-phase winding, and described rotor comprises: rotor core; Mouse cage winding, described mouse cage winding is along the circumferential arrangement of described rotor core; M organizes 2 pairs of utmost point permanent magnets, 2 pairs of utmost point permanent magnets of described M group are arranged on the inner side of described mouse cage winding, and the circumferential arrangement along described rotor core, every group of 2 pairs of utmost point permanent magnets in 2 pairs of utmost point permanent magnets of described M group comprise N magnetic pole permanent magnet positioned opposite to each other and S magnetic pole permanent magnet, and between two adjacent N magnetic pole permanent magnets, auxiliary magnet isolation tank is set between adjacent two S magnetic pole permanent magnets and between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet, wherein, M is more than or equal to 1 integer; The electric supply installation of above-mentioned three-phase self-starting permanent magnet synchronous motor, described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply.
According to the compressor assembly of the embodiment of the present invention, the rotor of three-phase self-starting permanent magnet synchronous motor has mouse cage winding and 2 pairs of utmost point permanent magnets of M group, and, 2 pairs of utmost point permanent magnets of M group are arranged on the inner side of mouse cage winding, and the circumferential arrangement along rotor core, every group of 2 pairs of utmost point permanent magnets in 2 pairs of utmost point permanent magnets of M group comprise N magnetic pole permanent magnet positioned opposite to each other and S magnetic pole permanent magnet, and between two adjacent N magnetic pole permanent magnets, between two adjacent S magnetic pole permanent magnets and between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet, auxiliary magnet isolation tank is set, wherein mouse cage winding makes to be pulled into run-in synchronism after three-phase self-starting permanent magnet synchronous motor asynchronous starting, auxiliary magnet isolation tank is for reducing leakage field, thereby obtain the uniform magnetic line of force, be conducive to subtract trochantinian torque pulsation, improved the efficiency of three-phase self-starting permanent magnet synchronous motor, and then improved the efficiency of compressor assembly.Meanwhile, the three-phase symmetrical alternating current that electric supply installation can outputting high quality is to give the power supply of three-phase self-starting permanent magnet synchronous motor, and this electric supply installation is simple in structure, with low cost.
According to one embodiment of present invention, described three phase windings adopt distribution winding modes or adopt and on stator tooth, concentrate the mode of coiling to be wound on described stator.
According to one embodiment of present invention, after described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply, described stator produces rotating magnetic field, described mouse cage winding is by cutting described rotating magnetic field to generate induced electromotive force, described induced electromotive force produces induced current in described mouse cage winding, have that described faradic described mouse cage winding produces electromagnetic force under the effect of described rotating magnetic field so that described rotor rotates, and when the magnetic field of 2 pairs of utmost point permanent magnets of described M group and described rotating magnetic field reach synchronous speed, described three-phase self-starting permanent magnet synchronous motor enters run-in synchronism state.
According to one embodiment of present invention, when the load variations of described three-phase self-starting permanent magnet synchronous motor, the electromagnetic force producing according to described mouse cage winding drives described three-phase self-starting permanent magnet synchronous motor to reenter described run-in synchronism state.
Third aspect present invention embodiment has also proposed a kind of control method of compressor assembly, wherein, described compressor assembly comprises three-phase self-starting permanent magnet synchronous motor and electric supply installation, described three-phase self-starting permanent magnet synchronous motor comprises stator and has mouse cage winding and the rotor of 2 pairs of utmost point permanent magnets of M group, described control method comprises the following steps: after described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply, described stator produces rotating magnetic field, and described mouse cage winding is by cutting described rotating magnetic field to generate induced electromotive force; Described induced electromotive force produces induced current in described mouse cage winding, has that described faradic described mouse cage winding produces electromagnetic force under the effect of described rotating magnetic field so that described rotor rotates; When the magnetic field of 2 pairs of utmost point permanent magnets of described M group and described rotating magnetic field reach synchronous speed, described three-phase self-starting permanent magnet synchronous motor enters run-in synchronism state.
According to the control method of the compressor assembly of the embodiment of the present invention, can make to be pulled into run-in synchronism state after three-phase self-starting permanent magnet synchronous motor asynchronous starting, by improving the efficiency of three-phase self-starting permanent magnet synchronous motor, improve the efficiency of compressor assembly, and this control method step is simple, be easy to realize.
According to one embodiment of present invention, also comprise: when the load variations of described three-phase self-starting permanent magnet synchronous motor, the electromagnetic force producing according to described mouse cage winding drives described three-phase self-starting permanent magnet synchronous motor to reenter described run-in synchronism state.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is according to the circuit diagram of the electric supply installation of the three-phase self-starting permanent magnet synchronous motor of the embodiment of the present invention;
Fig. 2 is the fundamental diagram of detection control unit according to an embodiment of the invention;
Fig. 3 is according to the block diagram of the compressor assembly of the embodiment of the present invention;
Fig. 4 is the sectional view of the rotor of the synchronous electronics of three-phase permanent in compressor assembly according to an embodiment of the invention;
Fig. 5 is according to the flow chart of the control method of the compressor assembly of the embodiment of the present invention.
Reference numeral:
In electric supply installation 200: commutation current transformer 10 and transformer 20; Rectifier bridge 101, direct current suppress and voltage regulation unit 102, inversion unit 103 and detection control unit 104, filter unit 105; The first voltage transformation unit 201 and the second voltage transformation unit 202;
In three-phase self-starting permanent magnet synchronous motor 100: rotor 1001, rotor core 1, mouse cage winding 2, auxiliary magnet isolation tank 3 and 6, permanent magnet 4 and 5.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The electric supply installation of the three-phase self-starting permanent magnet synchronous motor proposing according to the embodiment of the present invention and the compressor assembly of electric supply installation and the control method of compressor assembly with this three-phase self-starting permanent magnet synchronous motor are described with reference to the accompanying drawings.
As shown in Figure 1, the electric supply installation of the three-phase self-starting permanent magnet synchronous motor of the embodiment of the present invention comprises commutation current transformer 10 and transformer 20.Wherein, commutation current transformer 10 is connected with the output of the first single-phase alternating current Uaa, commutation current transformer 10 obtains the second single-phase alternating current Ubb according to the first single-phase alternating current Uaa, wherein, the quadrature in phase of the phase place of the second single-phase alternating current Ubb and the first single-phase alternating current Uaa, the difference of the amplitude of the amplitude of the second single-phase alternating current Ubb and the first single-phase alternating current Uaa is less than preset value, says, the amplitude of the amplitude of the second single-phase alternating current Ubb and the first single-phase alternating current Uaa about equally.Transformer 20 comprises first input end IN1 and the second input IN2, first input end IN1 is connected with commutation current transformer 10, the second input IN2 is connected with the output of the first single-phase alternating current Uaa, and transformer 20 generates three-phase symmetrical alternating current to supply with three-phase self-starting permanent magnet synchronous motor 100 according to the first single-phase alternating current Uaa and the second single-phase alternating current Ubb.
Particularly, according to one embodiment of present invention, as shown in Figure 1, commutation current transformer 10 comprises: rectifier bridge 101, direct current suppress and voltage regulation unit 102, inversion unit 103 and detection control unit 104.Wherein, the input of rectifier bridge 101 is connected with the output of the first single-phase alternating current Uaa, for the first single-phase alternating current Uaa is converted to direct current, direct current suppresses and voltage regulation unit 102 is connected with the output of rectifier bridge 101, be used for suppressing galvanic current break, and direct current is carried out to voltage stabilizing decoupling zero processing, inversion unit 103 suppresses with direct current and voltage regulation unit 102 is connected, detection control unit 104 is connected with inversion unit 103 with the output of the first single-phase alternating current Uaa, for the first single-phase alternating current Uaa is sampled with formation voltage sampled signal, and generate pulse-width modulation PWM signal to control inversion unit 103 output the second single-phase alternating current Ubb according to voltage sampling signal.
Wherein, commutation current transformer 10 also comprises the filter unit 105 being connected between inversion unit 103 and first input end IN1.
That is to say, in an embodiment of the present invention, commutation current transformer 10 comprises rectifier bridge 101, direct current inhibition and voltage regulation unit 102, inversion unit 103, detection control unit 104 and output filtering unit 105 totally five parts.Wherein, commutation current transformer 10 can make the first single-phase alternating current Uaa in phase place, depart from 90 degree, transformer 20 can by the suitable two-phase alternating current of quadrature in phase, amplitude the first single-phase alternating current Uaa and the second single-phase alternating current Ubb be transformed to three-phase symmetrical alternating current, this three-phase symmetrical alternating current exports three binding post a, b, the c of three-phase permanent-magnetic synchronous motors 100 to.
Further, single phase alternating current (A.C.) voltage α (voltage of the first single-phase alternating current Uaa in corresponding diagram 1, below all consistent), by full-bridge rectification bridge 101, becomes direct voltage through rectification; This direct voltage through direct current, suppress and voltage regulation unit 102 in inductance L 1 to suppress current break and to improve the power factor of power supply, by direct current, suppress simultaneously and voltage regulation unit 102 in and the capacitor C 1 that connects with burning voltage and decoupling zero; Detection control unit 104 calculates the waveform of required modulation signal according to voltage sampling signal, and control inversion unit 103 by PWM mode, 105 elimination HFSs through output filtering unit again after inversion conversion by 103 pairs of direct voltages of inversion unit, obtain and α quadrature in phase, voltage β that amplitude is suitable (voltage of the second single-phase alternating current Ubb in corresponding diagram 1, below all consistent); Above-mentioned quadrature in phase, two-phase alternating current α and β that amplitude is suitable are transformed to three-phase symmetrical alternating current by transformer 20.
According to one embodiment of present invention, as shown in Figure 2, the operation principle of detection control unit 104 is: the voltage α to the first single-phase alternating current Uaa samples, through PLL(Phase-Locked Loop, phase-locked loop) process the unit's of obtaining sinusoidal signal and cosine signal, wherein, ignore the harmonic wave of voltage, α phase voltage can be expressed as:
u
α(t)=U
αsinωt （1）
Formula (1) and the unit sinusoidal signal obtaining from PLL are multiplied each other, obtain:
Wherein, in formula (2), voltage comprises two parts: a part is DC component, half of the amplitude that its size is α phase voltage, another part is alternating current component, through LPF(Low Pass Filter, low pass filter) its alternating current component of elimination, be multiplied by 2 times, obtain the amplitude of α phase voltage.This amplitude and the cosine signal obtaining by PLL are multiplied each other, be the sinusoidal modulation signal of required β phase voltage.This sinusoidal modulation signal is controlled to the β phase voltage of inversion unit 103 output desired phases, amplitude by PWM mode.
Particularly, in one embodiment of the invention, as shown in Figure 1, transformer 20 comprises the first voltage transformation unit 201 and the second voltage transformation unit 202.Wherein, the first voltage transformation unit 201 comprises the first armature winding BB and the first secondary winding oa, the first armature winding BB is connected with commutation current transformer 10 by first input end IN1, and one end of the first secondary winding oa is connected with the first binding post a of three-phase self-starting permanent magnet synchronous motor 100.The second voltage transformation unit 202 comprises the second armature winding AA, second subprime winding ob and for the third time level winding oc, the second armature winding AA is connected with the output of the first single-phase alternating current Uaa by the second input IN2, one end of second subprime winding ob is connected with the second binding post b of three-phase self-starting permanent magnet synchronous motor 100, the other end of second subprime winding ob is connected with one end of level winding oc for the third time, the other end of level winding oc is connected with the 3rd binding post c of three-phase self-starting permanent magnet synchronous motor 100 for the third time, node o between one end of the other end of second subprime winding ob and level winding oc is for the third time connected with the other end of the first secondary winding oa.
Wherein, the number of turn of second subprime winding ob and for the third time equal turn numbers of level winding oc, and the number of turn of the first secondary winding oa is the number of turn of second subprime winding ob or the number of turn of level winding oc for the third time
doubly, the ratio of the number of turn of the number of turn of the first armature winding BB and the second armature winding AA is 0.8～0.92:1.
That is to say, in an embodiment of the present invention, transformer 20 comprises the first voltage transformation unit 201 and the second voltage transformation unit 202, wherein the armature winding two ends BB of the first voltage transformation unit 201 accesses voltage β, the mid-point tap o of the secondary winding of the second voltage transformation unit 202 is accessed in one end of secondary winding oa (o end), and the other end (a end) exports the binding post a of three-phase self-starting permanent magnet synchronous motor 100 to; The armature winding ends A A access voltage α of the second voltage transformation unit 202, secondary winding bc has mid-point tap o, above-mentioned mid-point tap o is divided into the second subprime winding ob of equal turn numbers and level winding oc for the third time by the secondary winding bc of the second voltage transformation unit 202, and the two ends of the secondary winding bc of the second voltage transformation unit 202 connect respectively binding post b, the c of three-phase self-starting permanent magnet synchronous motor.For meeting the secondary winding of the second voltage transformation unit 202 and the first voltage transformation unit 201, jointly export three-phase symmetrical alternating current, the number of turn of the secondary winding oa of the first voltage transformation unit 201 need be configured to 0.866 times of secondary winding bc of the second voltage transformation unit 202 (
doubly).In addition, because the rear loss of commutation current transformer 10 of flowing through of β phase voltage makes it lower than the voltage magnitude of α phase, the ratio of the amplitude of two phase voltages is about 0.8～0.92:1, for the part of compensation β phase voltage loss is suitable with α phase voltage amplitude with assurance β phase, the number of turn of the armature winding BB of the first voltage transformation unit 201 is configured to 0.8～0.92:1 with the ratio of the number of turn of the armature winding AA of the second voltage transformation unit 202.
In an example of the present invention, electric supply installation to above-mentioned three-phase self-starting permanent magnet synchronous motor is tested, test parameters is: input voltage α is single-phase alternating current 220V, 50Hz, in commutation current transformer, the inductance of output filtering unit is 120uH, in commutation current transformer, the electric capacity of output filtering unit is 45uF, and the switching frequency of inversion unit is 2kHz.So, output voltage β is 198V, phase place and voltage α quadrature, phase voltage Ua, Ub, the amplitude of Uc of three-phase symmetric voltage that exports three-phase terminal of three-phase self-starting permanent magnet synchronous motor to is respectively: 218V, 220V, 203V, in phase place, respectively differ 120 degree, therefore the three-phase voltage of output is three-phase symmetrical alternating current substantially.
According to the electric supply installation of the three-phase self-starting permanent magnet synchronous motor of the embodiment of the present invention, only there is the just three-phase symmetrical alternating current of energy outputting high quality of commutation current transformer and transformer, therefore, this electric supply installation is simple in structure, and adopt less switching device, have advantages of with low cost, the quality of power supply good.
Fig. 3 is according to the block diagram of the compressor assembly of the embodiment of the present invention.As shown in Figure 3, this compressor assembly comprises the electric supply installation 200 of three-phase self-starting permanent magnet synchronous motor 100 and three-phase self-starting permanent magnet synchronous motor, and wherein electric supply installation 200 is 100 power supplies of three-phase self-starting permanent magnet synchronous motor.
Three-phase self-starting permanent magnet synchronous motor 100 comprises rotor 1001 and stator, and stator comprises three-phase winding, and as shown in Figure 4, rotor 1001 comprises rotor core 1, mouse cage winding 2 and 2 pairs of utmost point permanent magnets of M group.Wherein, mouse cage winding 2 is along the circumferential arrangement of rotor core 1; 2 pairs of utmost point permanent magnets of M group are arranged on the inner side of mouse cage winding 2, and the circumferential arrangement along rotor core 1, every group of 2 pairs of utmost point permanent magnets in 2 pairs of utmost point permanent magnets of M group comprise N magnetic pole permanent magnet positioned opposite to each other and S magnetic pole permanent magnet, and between two adjacent N magnetic pole permanent magnets, auxiliary magnet isolation tank is set between adjacent two S magnetic pole permanent magnets and between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet, wherein, M is more than or equal to 1 integer.
Particularly, in one embodiment of the invention, as shown in Figure 4, rotor 1001 can be the motor rotor with the 2 pairs of utmost points of M group that consist of 2M permanent magnet.M=2 wherein, the rotor 1001 of the three-phase self-starting permanent magnet synchronous motor 100 in Fig. 4 is motor rotor structures of 2 groups of 2 pairs of utmost points forming of 4 permanent magnets.Wherein, two N magnetic poles that are positioned at the permanent magnet 4 formation rotors of outside diameter, two S magnetic poles that are positioned at the permanent magnet 5 formation rotors of outside diameter, thereby two groups of common rotor structures that form the motor of 2 groups of 2 pairs of utmost points of 4 permanent magnets.The permanent magnet of 2 groups of 2 pairs of utmost points extremely outside for example mouse cage winding 2 of aluminum is set, and auxiliary magnet isolation tank 3 is set between two adjacent N magnetic pole permanent magnets, auxiliary magnet isolation tank 6 is set between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet.
In an embodiment of the present invention, the effect that mouse cage winding is set in rotor periphery is to induce the starting of three-phase self-starting permanent magnet synchronous motor, and can in the process that three-phase self-starting permanent magnet synchronous motor is pulled in, play a role.
Particularly, after electric supply installation 200 is 100 power supplies of three-phase self-starting permanent magnet synchronous motor, after on the stator of three-phase self-starting permanent magnet synchronous motor 100, three phase windings are switched on, stator produces rotating magnetic field, mouse cage winding 2 is by cutting rotating magnetic field to generate induced electromotive force, this induced electromotive force produces induced current in mouse cage winding 2, have that faradic mouse cage winding produces electromagnetic force under the effect of rotating magnetic field so that rotor 1001 rotates, even if the rotor 1001 of three-phase self-starting permanent magnet synchronous motor 100 rotates with rotating magnetic field, when taking certain certain rotating speed to, when the magnetic field of 2 pairs of utmost point permanent magnets of M group and rotating magnetic field reach synchronous speed, three-phase self-starting permanent magnet synchronous motor 100 enters run-in synchronism state.Wherein, when the magnetic field of 2 pairs of utmost point permanent magnets of M group and rotating magnetic field reach synchronous speed, because rotor and rotating magnetic field do not have relative motion, the mouse cage winding 2 of rotor 1001 does not cut rotating magnetic field, mouse cage winding 2 does not produce heating loss, and the mouse cage winding 2 of rotor 1001 no longer produces electromagnetic force owing to not cutting rotating magnetic field, thereby three-phase self-starting permanent magnet synchronous motor is synchronously rotated as synchronous motor, therefore the effect of the mouse cage winding of rotor is just to promote the asynchronous starting of three-phase self-starting permanent magnet synchronous motor, and three-phase self-starting permanent magnet synchronous motor is finally pulled into synchronously.
In an embodiment of the present invention, assist the effect of magnet isolation tank 3 and 6 to be to reduce leakage field, thereby obtain the uniform magnetic line of force, reduce the size deviation of rotor torque.In auxiliary magnet isolation tank 3 and 6, be generally air or the aluminium that permeability is lower is set, therefore strengthened the magnetic resistance every magnetic auxiliary tank 3 and 6 positions, reduce leakage field, thereby be also conducive to reduce the torque pulsation of rotor, improved the efficiency of three-phase self-starting permanent magnet synchronous motor.
According to one embodiment of present invention, when the load variations of three-phase self-starting permanent magnet synchronous motor, the electromagnetic force producing according to mouse cage winding drives three-phase self-starting permanent magnet synchronous motor to reenter run-in synchronism state.I.e. speech, if there is the change of load in the limit of power of three-phase self-starting permanent magnet synchronous motor, makes three-phase self-starting permanent magnet synchronous motor reach rapidly new poised state because the existence of mouse cage winding can produce detent torque.
According to one embodiment of present invention, three phase windings can adopt distribution winding mode or adopt and on stator tooth, concentrate the mode of coiling to be wound on stator.
According to the compressor assembly of the embodiment of the present invention, the rotor of three-phase self-starting permanent magnet synchronous motor has mouse cage winding and 2 pairs of utmost point permanent magnets of M group, and, 2 pairs of utmost point permanent magnets of M group are arranged on the inner side of mouse cage winding, and the circumferential arrangement along rotor core, every group of 2 pairs of utmost point permanent magnets in 2 pairs of utmost point permanent magnets of M group comprise N magnetic pole permanent magnet positioned opposite to each other and S magnetic pole permanent magnet, and between two adjacent N magnetic pole permanent magnets, between two adjacent S magnetic pole permanent magnets and between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet, auxiliary magnet isolation tank is set, wherein mouse cage winding makes to be pulled into run-in synchronism after three-phase self-starting permanent magnet synchronous motor asynchronous starting, auxiliary magnet isolation tank is for reducing self-starting leakage field, thereby obtain the uniform magnetic line of force, be conducive to subtract trochantinian torque pulsation, improved the efficiency of three-phase self-starting permanent magnet synchronous motor, and then improved the efficiency of compressor assembly.Meanwhile, the three-phase symmetrical alternating current that electric supply installation can outputting high quality is to give the power supply of three-phase self-starting permanent magnet synchronous motor, and this electric supply installation is simple in structure, with low cost.
Fig. 5 is according to the flow chart of the control method of the compressor assembly of the embodiment of the present invention.Wherein, this compressor assembly comprises three-phase self-starting permanent magnet synchronous motor and electric supply installation, and three-phase self-starting permanent magnet synchronous motor comprises stator and have mouse cage winding and the rotor of 2 pairs of utmost point permanent magnets of M group, and this control method comprises the following steps:
S1, after electric supply installation is the power supply of three-phase self-starting permanent magnet synchronous motor, stator produces rotating magnetic field, and mouse cage winding is by cutting rotating magnetic field to generate induced electromotive force.Say, after on the stator of three-phase self-starting permanent magnet synchronous motor, three phase windings are switched on, three-phase self-starting permanent magnet synchronous motor starts starting, and stator produces rotating magnetic field, and the rotating magnetic field that mouse cage winding produces by cutting stator is to generate induced electromotive force.
S2, induced electromotive force produces induced current in mouse cage winding, has that faradic mouse cage winding produces electromagnetic force under the effect of rotating magnetic field so that rotor rotates, and the rotor of three-phase self-starting permanent magnet synchronous motor rotates with rotating magnetic field.
S3, when the magnetic field of 2 pairs of utmost point permanent magnets of M group and rotating magnetic field reach synchronous speed, three-phase self-starting permanent magnet synchronous motor enters run-in synchronism state.
When the magnetic field of 2 pairs of utmost point permanent magnets of M group and rotating magnetic field reach synchronous speed, because rotor and rotating magnetic field do not have relative motion, the mouse cage winding of rotor does not cut rotating magnetic field, mouse cage winding does not produce heating loss, and the mouse cage winding of rotor no longer produces electromagnetic force owing to not cutting rotating magnetic field, thereby three-phase self-starting permanent magnet synchronous motor is synchronously rotated as synchronous motor, therefore the effect of the mouse cage winding of rotor is just to promote the asynchronous starting of three-phase self-starting permanent magnet synchronous motor, and three-phase self-starting permanent magnet synchronous motor is finally pulled into synchronously.
According to one embodiment of present invention, the control method of above-mentioned compressor assembly, also comprise: when the load variations of three-phase self-starting magnetic-synchro forever motor, the electromagnetic force producing according to mouse cage winding drives three-phase self-starting permanent magnet synchronous motor to reenter run-in synchronism state.I.e. speech, if there is the change of load in the limit of power of three-phase self-starting permanent magnet synchronous motor, makes three-phase self-starting permanent magnet synchronous motor reach rapidly new poised state because the existence of mouse cage winding can produce detent torque.
According to the control method of the compressor assembly of the embodiment of the present invention, can make to be pulled into run-in synchronism state after three-phase self-starting permanent magnet synchronous motor asynchronous starting, by improving the efficiency of three-phase self-starting permanent magnet synchronous motor, improve the efficiency of compressor assembly, and this control method step is simple, be easy to realize.
In flow chart or any process of otherwise describing at this or method describe and can be understood to, represent to comprise that one or more is for realizing module, fragment or the part of code of executable instruction of the step of specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by embodiments of the invention person of ordinary skill in the field.
The logic and/or the step that in flow chart, represent or otherwise describe at this, for example, can be considered to for realizing the sequencing list of the executable instruction of logic function, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise that the system of processor or other can and carry out the system of instruction from instruction execution system, device or equipment instruction fetch), use, or use in conjunction with these instruction execution systems, device or equipment.With regard to this specification, " computer-readable medium " can be anyly can comprise, storage, communication, propagation or transmission procedure be for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically of computer-readable medium (non-exhaustive list) comprises following: the electrical connection section (electronic installation) with one or more wirings, portable computer diskette box (magnetic device), random-access memory (ram), read-only memory (ROM), the erasable read-only memory (EPROM or flash memory) of editing, fiber device, and portable optic disk read-only memory (CDROM).In addition, computer-readable medium can be even paper or other the suitable medium that can print described program thereon, because can be for example by paper or other media be carried out to optical scanner, then edit, decipher or process in electronics mode and obtain described program with other suitable methods if desired, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in memory and by software or the firmware of suitable instruction execution system execution.For example, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, the application-specific integrated circuit (ASIC) with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (11)
1. an electric supply installation for three-phase self-starting permanent magnet synchronous motor, is characterized in that, comprising:
Commutation current transformer, described commutation current transformer is connected with the output of the first single-phase alternating current, described commutation current transformer obtains the second single-phase alternating current according to described the first single-phase alternating current, wherein, the quadrature in phase of the phase place of described the second single-phase alternating current and described the first single-phase alternating current, the difference of the amplitude of the amplitude of described the second single-phase alternating current and described the first single-phase alternating current is less than preset value;
Transformer, described transformer comprises first input end and the second input, described first input end is connected with described commutation current transformer, described the second input is connected with the output of described the first single-phase alternating current, and described transformer generates three-phase symmetrical alternating current to supply with described three-phase self-starting permanent magnet synchronous motor according to described the first single-phase alternating current and described the second single-phase alternating current.
2. the electric supply installation of three-phase self-starting permanent magnet synchronous motor as claimed in claim 1, is characterized in that, described transformer comprises the first voltage transformation unit and the second voltage transformation unit, wherein,
Described the first voltage transformation unit comprises:
The first armature winding, described the first armature winding is connected with described commutation current transformer by described first input end;
The first secondary winding, one end of described the first secondary winding is connected with the first binding post of described three-phase self-starting permanent magnet synchronous motor;
Described the second voltage transformation unit comprises:
The second armature winding, described the second armature winding is connected with the output of described the first single-phase alternating current by described the second input;
Second subprime winding and for the third time level winding, one end of described second subprime winding is connected with the second binding post of described three-phase self-starting permanent magnet synchronous motor, the other end of described second subprime winding is connected with one end of the described winding of level for the third time, described the level for the third time other end of winding and the 3rd binding post of described three-phase self-starting permanent magnet synchronous motor are connected, and the node between one end of the other end of described second subprime winding and described grade winding for the third time is connected with the other end of described the first secondary winding.
3. the electric supply installation of three-phase self-starting permanent magnet synchronous motor as claimed in claim 2, it is characterized in that, the equal turn numbers of the number of turn of described second subprime winding and the described winding of level for the third time, and the number of turn of described the first secondary winding is the number of turn of described second subprime winding or the number of turn of the described winding of level for the third time
doubly, the ratio of the number of turn of the number of turn of described the first armature winding and described the second armature winding is 0.8～0.92:1.
4. the electric supply installation of three-phase self-starting permanent magnet synchronous motor as claimed in claim 1, is characterized in that, described commutation current transformer comprises:
Rectifier bridge, the input of described rectifier bridge is connected with the output of described the first single-phase alternating current, for described the first single-phase alternating current is converted to direct current;
Direct current suppresses and voltage regulation unit, and described direct current inhibition and voltage regulation unit are connected with the output of described rectifier bridge, for suppressing described galvanic current break, and described direct current are carried out to voltage stabilizing decoupling zero processing;
Inversion unit, described inversion unit suppresses with described direct current and voltage regulation unit is connected;
Detection control unit, described detection control unit is connected with described inversion unit with the output of described the first single-phase alternating current, for described the first single-phase alternating current is sampled with formation voltage sampled signal, and to control described inversion unit, export described the second single-phase alternating current according to described voltage sampling signal generation pulse-width modulation PWM signal.
5. the electric supply installation of three-phase self-starting permanent magnet synchronous motor as claimed in claim 4, is characterized in that, described commutation current transformer also comprises the filter unit being connected between described inversion unit and described first input end.
6. a compressor assembly, is characterized in that, comprising:
Three-phase self-starting permanent magnet synchronous motor, described three-phase self-starting permanent magnet synchronous motor comprises rotor and stator, and described stator comprises three-phase winding, and described rotor comprises:
Rotor core;
Mouse cage winding, described mouse cage winding is along the circumferential arrangement of described rotor core;
M organizes 2 pairs of utmost point permanent magnets, 2 pairs of utmost point permanent magnets of described M group are arranged on the inner side of described mouse cage winding, and the circumferential arrangement along described rotor core, every group of 2 pairs of utmost point permanent magnets in 2 pairs of utmost point permanent magnets of described M group comprise N magnetic pole permanent magnet positioned opposite to each other and S magnetic pole permanent magnet, and between two adjacent N magnetic pole permanent magnets, auxiliary magnet isolation tank is set between adjacent two S magnetic pole permanent magnets and between adjacent N magnetic pole permanent magnet and S magnetic pole permanent magnet, wherein, M is more than or equal to 1 integer;
The electric supply installation of the three-phase self-starting permanent magnet synchronous motor as described in any one in claim 1-5, described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply.
7. compressor assembly as claimed in claim 6, is characterized in that, described three phase windings adopt distribution winding mode or adopt concentrates the mode of coiling to be wound on described stator on stator tooth.
8. compressor assembly as claimed in claim 6, it is characterized in that, after described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply, described stator produces rotating magnetic field, described mouse cage winding is by cutting described rotating magnetic field to generate induced electromotive force, described induced electromotive force produces induced current in described mouse cage winding, have that described faradic described mouse cage winding produces electromagnetic force under the effect of described rotating magnetic field so that described rotor rotates, and when the magnetic field of 2 pairs of utmost point permanent magnets of described M group and described rotating magnetic field reach synchronous speed, described three-phase self-starting permanent magnet synchronous motor enters run-in synchronism state.
9. compressor assembly as claimed in claim 7, it is characterized in that, when the load variations of described three-phase self-starting permanent magnet synchronous motor, the electromagnetic force producing according to described mouse cage winding drives described three-phase self-starting permanent magnet synchronous motor to reenter described run-in synchronism state.
10. the control method of a compressor assembly, it is characterized in that, described compressor assembly comprises three-phase self-starting permanent magnet synchronous motor and electric supply installation, described three-phase self-starting permanent magnet synchronous motor comprises stator and has mouse cage winding and the rotor of 2 pairs of utmost point permanent magnets of M group, and described control method comprises the following steps:
After described electric supply installation is described three-phase self-starting permanent magnet synchronous motor power supply, described stator produces rotating magnetic field, and described mouse cage winding is by cutting described rotating magnetic field to generate induced electromotive force;
Described induced electromotive force produces induced current in described mouse cage winding, has that described faradic described mouse cage winding produces electromagnetic force under the effect of described rotating magnetic field so that described rotor rotates;
When the magnetic field of 2 pairs of utmost point permanent magnets of described M group and described rotating magnetic field reach synchronous speed, described three-phase self-starting permanent magnet synchronous motor enters run-in synchronism state.
The control method of 11. compressor assemblies as claimed in claim 10, is characterized in that, also comprises:
When the load variations of described three-phase self-starting permanent magnet synchronous motor, the electromagnetic force producing according to described mouse cage winding drives described three-phase self-starting permanent magnet synchronous motor to reenter described run-in synchronism state.
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| CN201310577424.XA CN103595263A (en) | 2013-11-18 | 2013-11-18 | Compressor system and method and power supply device of three-phase self-starting permanent magnet synchronous motor |
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| CN201310577424.XA CN103595263A (en) | 2013-11-18 | 2013-11-18 | Compressor system and method and power supply device of three-phase self-starting permanent magnet synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106921297A (en) * | 2017-04-21 | 2017-07-04 | 哈尔滨工业大学 | A kind of transmitting non-contact electric energy resonance type power converter |
| CN108458457A (en) * | 2018-04-28 | 2018-08-28 | 广东美的制冷设备有限公司 | Transducer air conditioning circuit board, transducer air conditioning |
| CN111669000A (en) * | 2019-03-08 | 2020-09-15 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
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| JP2004032907A (en) * | 2002-06-26 | 2004-01-29 | Hitachi Ltd | Controller for permanent magnet type synchronous motor |
| CN101110543A (en) * | 2006-07-17 | 2008-01-23 | 上海日立电器有限公司 | Compressor and its control method |
| CN202435296U (en) * | 2011-12-28 | 2012-09-12 | 上海交通大学 | Single-phase rectification booster circuit in wind power generation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004032907A (en) * | 2002-06-26 | 2004-01-29 | Hitachi Ltd | Controller for permanent magnet type synchronous motor |
| CN101110543A (en) * | 2006-07-17 | 2008-01-23 | 上海日立电器有限公司 | Compressor and its control method |
| CN202435296U (en) * | 2011-12-28 | 2012-09-12 | 上海交通大学 | Single-phase rectification booster circuit in wind power generation |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106921297A (en) * | 2017-04-21 | 2017-07-04 | 哈尔滨工业大学 | A kind of transmitting non-contact electric energy resonance type power converter |
| CN106921297B (en) * | 2017-04-21 | 2019-02-19 | 哈尔滨工业大学 | A kind of transmitting non-contact electric energy resonance type power converter |
| CN108458457A (en) * | 2018-04-28 | 2018-08-28 | 广东美的制冷设备有限公司 | Transducer air conditioning circuit board, transducer air conditioning |
| CN111669000A (en) * | 2019-03-08 | 2020-09-15 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
| CN111669000B (en) * | 2019-03-08 | 2021-09-21 | 美的威灵电机技术（上海）有限公司 | Control circuit of rotor, rotor assembly, motor and compressor |
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