CN106817065B - Two-phase induction motor, the air conditioner for having two-phase induction motor - Google Patents
Two-phase induction motor, the air conditioner for having two-phase induction motor Download PDFInfo
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- CN106817065B CN106817065B CN201610596077.9A CN201610596077A CN106817065B CN 106817065 B CN106817065 B CN 106817065B CN 201610596077 A CN201610596077 A CN 201610596077A CN 106817065 B CN106817065 B CN 106817065B
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- 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
- H02P27/08—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 with pulse width modulation
- H02P27/085—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 with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
-
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
Abstract
The air conditioner that the present invention provides a kind of two-phase induction motor, has two-phase induction motor, realizes efficient two-phase induction motor.When output torque when by maximum speed occur is set as rated output torque, the impedance value of main coil (12) and ancillary coil (14) is set, thus being applied with the alternating voltage of commercial ac power source (30) output to main coil (12) and ancillary coil (14)Maximum speed and rated output torque are obtained in the state of voltage below again.
Description
Technical field
The present invention relates to a kind of two-phase induction motor, have the air conditioner and program of two-phase induction motor.
Background technique
As the background technique of the art, following content is described in the abstract of following patent documents 1: " being mentioned
For a kind of speed without using the monocyclic-start induction motor that can easy start up monocyclic-start induction motor into phase electricity container
Control device " " provides variable frequency, variable voltage to monocyclic-start induction motor 5 using three phase converter 4.Control three phase transformation
Switch element Q11~Q32 of frequency device 4 is to make the phase shifting to each coil 5a, 5b of motor 5 voltage applied, thus
Monocyclic-start induction motor 5 " can be started.
In addition, describing following content in the abstract of following patent documents 2: " converter plant 1 is by converter circuit 3
Each phase output terminals be connected respectively with the main coil 4b of induction conductivity 4, ancillary coil 4a, the neutral conductor, will be from direct current
The DC voltage conversion that source 2 provides is the substantially sinusoidal wave PWM voltage of 2 phases, when from the direct current detected by current detecting part 5
When source current detects the electric current of main coil 4b and ancillary coil 4a, inductance value to main coil 4b, ancillary coil 4a and
Being balanced of resistance value, vector majorization operational part 6 determine 2 phase voltages to induction conductivity 4 by vector majorization operation.So
Afterwards, pwm signal forming portion 5 forms the pwm signal for controlling converter circuit 3 according to above-mentioned 2 phase voltage ".
But when by common transducer drive on the two-phase induced electricity premised on being used together into phase electricity container
When motivation, when by being driven into phase electricity container compared with, the output torque of two-phase induction motor is lower, therefore can not
Same maximum speed, output torque when obtaining with using phase advance capacitor.Further, since fever caused by loss, generates sense
A problem that induction motor damages.
Patent document 1: Japanese Unexamined Patent Publication 7-46872 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2010-57216 bulletin
Summary of the invention
Present invention has been made in view of the above problems, and the purpose is to provide a kind of two-phase induction for capableing of high-efficiency operation
Motor, the air conditioner and program for having two-phase induction motor.
In order to solve the above problems, two-phase induction motor of the invention is characterized in that,
With main coil and ancillary coil,
The two-phase induction motor is used for air conditioner, which has: rectification circuit, the friendship to commercial ac power source
Galvanic electricity pressure is rectified；Induction motor drive circuit switchs the DC voltage exported from above-mentioned rectification circuit, point
Other output phase different the 1st voltage, the 2nd voltage and the 3rd voltage；And the blowing fan as driven object,
When output torque when by maximum speed occur is set as rated output torque, above-mentioned main coil and above-mentioned auxiliary is set
The impedance value of index contour circle, thus being applied with the upper of above-mentioned commercial ac power source output to above-mentioned main coil and above-mentioned ancillary coil
State alternating voltageAbove-mentioned maximum speed and above-mentioned rated output torque are obtained in the state of voltage below again.
By means of the invention it is possible to the sky realized the two-phase induction motor of high-efficiency operation, have two-phase induction motor
Tune machine and program.
Detailed description of the invention
Fig. 1 is the block diagram of the major part of the air conditioner of the 1st embodiment of the invention.
(a) of Fig. 2~(f) is the waveform diagram in each portion in the major part of the air conditioner of the 1st embodiment.
(a), (b) of Fig. 3 is the figure indicated in the sense of current of moment t1, t2.
(a), (b) of Fig. 4 is the figure indicated in the sense of current of moment t3, t4.
Fig. 5 is the torque characteristic figure of motor.
Fig. 6 is other torque characteristic figures of motor.
Fig. 7 is the flow chart of the control program of the 1st embodiment.
The torque characteristic figure of motor when (a), (b) of Fig. 8 is starting.
(a) of Fig. 9~(c) is the torque characteristic figure of the motor after starting.
Figure 10 is the waveform diagram of electric current of the motor of comparative example etc..
Figure 11 is other waveform diagrams of electric current of the motor of comparative example etc..
Figure 12 is the waveform diagram of electric current of motor of the 1st embodiment etc..
Figure 13 is other waveform diagrams of electric current of motor of the 1st embodiment etc..
Figure 14 is the block diagram of the major part of the air conditioner of the 2nd embodiment of the invention.
(a) of Figure 15~(e) is the waveform diagram in each portion in the major part of the air conditioner of the 2nd embodiment.
Figure 16 is the front elevation of the air conditioner of the 3rd embodiment of the invention.
Figure 17 is the side cross-sectional view of the indoor unit of the air conditioner of the 3rd embodiment.
Figure 18 is the block diagram of the major part of the 3rd embodiment.
Symbol description
10 two-phase induction motors (motor, induction conductivity)
12 main coils
14 ancillary coils
16 speed probes
20,21 frequency converter
24 control circuits (computer)
26 rectification circuits
54 revolutional slip calculation parts
56 synchronizing speed configuration parts
58 target velocity configuration parts
A air conditioner
A1, A2 motor drive
Edc DC voltage
N、N1、N2、N3Actual speed
NSSynchronizing speed
NXObject synchronization speed
NpTorque peak revolving speed
S revolutional slip
smaxPredetermined value
TL、TL1、TL2Load torque
TM、TM1、TM2、TM3Motor torque
VU-VVoltage between lines (main coil application voltage)
VW-VVoltage between lines (ancillary coil application voltage)
VUVoltage (the 1st voltage)
VVVoltage (the 2nd voltage)
VWVoltage (the 3rd voltage)
Specific embodiment
[the 1st embodiment]
The structure > of < embodiment
Hereinafter, major part, that is, motor of the block diagram shown in referring to Fig.1 to the air conditioner of the 1st embodiment of the invention
The structure of driving device A1 is illustrated.
In Fig. 1, two-phase induction motor (hereinafter referred to as motor) 10 has main coil 12 and ancillary coil 14, with
The connection of load device 40 is to carry out rotation driving to load device 40.Main coil 12 and ancillary coil 14 are configured to work as and mentioned
It has supplied to rotate magnetic field when two-phase alternating current electric current.Speed probe 16 has Hall sensor etc., and detection motor 10 turns
The revolving speed (hereinafter referred to as actual speed N [rpm]) of son.
In the present embodiment, the impedance of main coil 12 and ancillary coil 14 is roughly the same.In addition, in the following description,
For example refer to that high value is 1.05 times or less of low value about two values " roughly the same ".In addition, " substantially about a value X
X " for example refers to the range of " X ± 5% ".The impedance of main coil 12 and ancillary coil 14 not necessarily must be roughly the same, but uncommon
1.25 times or less for hoping the impedance for keeping high impedance low.This is because consider motor coil impedance fluctuation be up to ±
10% or so.For example, in the case where being -10% because of the impedance that the impedance in main coil is+10% ancillary coil, main coil
Impedance become 1.22 times or so of ancillary coil.
Rectification circuit 26 rectifies the alternating voltage provided from source power supply 30, and smoothing capacity device 28 makes rectification circuit
26 output voltage smoothing, exports DC voltage Edc.As the virtual value E for the alternating voltage for making source power supply 30, direct current
Voltage Edc is aboutDC voltage Edc is inputed into frequency converter 20.But it is also possible in the rear class of rectification circuit 26,
It is inserted into the booster circuit etc. generally used, is higher than DC voltage EdcThereby, it is possible to improve revolving speed, obtain bigger defeated
Torque out.Frequency converter (induction motor drive circuit) 20 has switch element 22a~22f (for example, IGBT or MOS-FET etc.
Thyristor), the reflux diode that is connected in parallel with these.In addition, switch element 22a~22f is referred to as " opening
Close element 22 ".
These switch elements 22 constitute the upper lower arm of each phase by the way that 2 groups of switch elements 22 are connected in series.In the example of Fig. 1
In, the upper lower arm of U phase is made up of switch element 22a, 22b, and the upper lower arm of V phase is made up of switch element 22c, 22d, is passed through
The upper lower arm of switch element 22e, 22f composition W phase.The tie point of the upper lower arm of each phase is connect with motor 10.By from control
The driving signal that circuit 24 provides carries out ON/OFF control to switch element 22a~22f.Frequency converter 20 is according to this as a result,
Driving signal carries out PWM (modulation of Pulse Width Modulation pulse width) modulation to DC voltage Edc.Power circuit
25, which generate control circuit 24 from DC voltage Edc, uses supply voltage.Additionally, it is desirable that making to carry out PWM modulation for switch element 22
When modulating frequency be higher than audible frequency frequency (for example, 15kHz or more).
Control circuit 24 has CPU (Central Processing Unit, central processing unit), RAM (Random
Access Memory, random access memory), ROM (Read Only Memory, read-only memory) etc. be used as general meter
The hardware of calculation machine, storage is by CPU control program, various data executed etc. in ROM.In Fig. 1, about control circuit 24
Inside will be expressed as module by the function of the realizations such as control program.
In the inside of control circuit 24, the synchronizing speed N of 58 output motor 10 of target velocity configuration partSTarget value be
Object synchronization speed NX.Synchronizing speed configuration part 56 sets synchronizing speed NSSo that synchronizing speed NSWith object synchronization speed NXIt connects
It is close or consistent.Revolutional slip calculation part 54 is according to synchronizing speed NSRevolutional slip s (=(the N of motor 10 is calculated with actual speed NS?
N)/NS).The synchronizing speed N that driving portion 52 is exported according to synchronizing speed configuration part 56SAbove-mentioned driving signal is generated, and is supplied to
Switch element 22.
It is substantially sine wave from the voltage of the U phase of the output of frequency converter 20, V phase, W phase, these is known as VU、VV、VW.In addition,
Sometimes these are referred to as " voltage V ".In addition, the frequency of voltage V is known as " driving frequency f ".If by the number of poles of motor 10
It is set as p, then synchronizing speed NSThere is " N between driving frequency fSThe relationship of=120f/p ".Therefore, driving portion 52 will be realized and will be somebody's turn to do
The pwm signal of driving frequency f is exported as driving signal.
In the present embodiment, driving signal is set, so that V phase voltage VVPhase relative to U phase voltage VUAdvance 90 °,
W phase voltage VWPhase relative to V phase voltage VVIt is advanced further 90 °.Apply the alternate voltage between lines of U phase, V to main coil 12
VU-V, apply the alternate voltage between lines V of W phase, V to ancillary coil 14W-V.(a) of Fig. 2~(c) indicates voltage VU、VV、VWWave
Shape.The virtual value E of alternating voltage relative to source power supply 30, voltage VU、VV、VWMaximum be Minimum is
Zero.Therefore, voltage VU、VV、VWAmplitude beTheir virtual value is (1/2) E.
In two-phase induction motor, it is known that when flowing through the phase difference of electric current of main coil and ancillary coil is 90 °, i.e.,
Efficiency is best when periodic inequality with 1/4 period.This is obtained in the configuration aspects of motor, at 2 poles, 4 poles, 8 pole
It is identical.
However, the impedance of the coil of induction conductivity is determined by the inductance of coil and the conductor resistance of coil, in main line
In the case that circle is different with the impedance of ancillary coil, relative to the voltage applied, the phase delay of the electric current flowed through is in main line
It is different in circle and ancillary coil.Therefore, the phase difference for flowing through the electric current of each coil does not differ 90 °, i.e., did not differed for 1/4 period, because
This efficiency reduces.Therefore, in this case, it is also contemplated that the phase of the retardation adjusts the phase difference of the voltage of application.
In the two-phase induction motor of present embodiment, the advantage is that having carried out setting to make main coil and auxiliary
When the impedance of index contour circle is identical, making input voltage was respectively 1/4 period, and the electric current for thus flowing through each coil is also staggered 90 °, i.e., wrong
It opened for 1/4 period, therefore does not need to adjust the phase difference of the voltage applied to each induction conductivity used.
In addition, showing voltage between lines V in Fig. 2 (d)~(f)U-V、VW-V、VU-WWaveform.Respectively to 12 He of main coil
Ancillary coil 14 applies voltage between lines VU-VAnd VW-V.As voltage VU、VV、VWWhen for sine wave, voltage between lines VU-VAnd VW-VAmplitude
ForTheir virtual value is
In other words, when the output torque of the maximum speed of motor 10 is set as rated output torque, 12 He of main coil
The impedance of ancillary coil 14 is to be by inputting virtual valueAlternating voltage below and obtain rated output torque
Value.
Here, " maximum speed " refer to main coil 12 input virtual value beAlternating voltage, to auxiliary
The input of index contour circle 14 makes a reservation for the alternating voltage into phase relative to the alternating voltage inputted to main coil 12, to carry out and motor 10
In the case where the driving (for example, from blowing fan blow) of the load device 40 of connection, make to main coil 12 and ancillary coil 14
The highest revolving speed in revolving speed obtained when the input changeable frequency of alternating voltage.
Example when above-mentioned example is without ovennodulation, but by voltage VU、VV、VWIt is mixed into the high frequency of odd-times
Ingredient can be such that their amplitude rises toIn addition, ovennodulation is the skill for Frequency Converter Control
An example of art, can carry out ovennodulation and also without.
The voltage between lines V applied to main coil 12U-VWith the voltage between lines V applied to ancillary coil 14W-VAlthough phase is not
Together, but voltage value is roughly the same.Therefore, the electric current for flowing through main coil 12 is roughly the same with the electric current for flowing through ancillary coil 14.This
Outside, indicated by the heavy line of (a) of (a) of Fig. 3, (b) and Fig. 4, (b) (a)~(f) of Fig. 2 in moment t1, t2, t3, t4
Electric current flowing.
Then, it is illustrated referring to torque characteristics of the Fig. 5 to motor 10.In Fig. 5, horizontal axis indicates turning for motor 10
The actual speed N [rpm] of son, the longitudinal axis indicate torque [Nm].In induction conductivity, that is, motor 10, solid line indicates electronic
Machine torque TMWith the shape for illustrating such general triangular.In addition, the T that dotted line indicatesL1、TL2For the load of load device 40
The characteristic example of torque.With load torque TL1Or TL2Opposite actual speed N is load torque TL1Or TL2Characteristic and motor turn
Square TMThe speed of point reported to the leadship after accomplishing a task of characteristic.
By motor torque TMIt is known as torque peak revolving speed N for maximum actual speed Np.According to the structure of motor 10,
Operating status and different, but torque peak revolving speed NpIt is the speed of " 0.2 " nearby as revolutional slip s.It is more than to turn by actual speed N
Square peak speed NpRegion be known as " stability region ", by actual speed N be torque peak revolving speed NpRegion below is known as " no
Stability region ".In unstable region, due to load torque TL2Small variations, actual speed N is widely varied.In addition, turning
Rate s becomes larger, therefore the rising of the power loss of motor 10, temperature also becomes larger.Therefore, the control circuit 24 of present embodiment is controlled
Synchronizing speed N processedSTo avoid the movement of unstable region.In addition, will be illustrated later to its details.
Then, Fig. 6 indicates that when driving frequency be f1、f2、f3When (wherein, f1< f2< f3) motor torque TM1、TM2、
TM3Characteristic example and actual speed N1、N2、N3.Control circuit 24 sets voltage V so that the ratio of voltage V and driving frequency f is substantially permanent
It is fixed.The setting method of such voltage V is known as " V/F constant control ".As shown, load torque bigger in actual speed N
TLIn the case where bigger, as the increase revolutional slip s of actual speed N becomes larger.
The movement > of < embodiment
Then, the movement of present embodiment is illustrated referring to Fig. 7.In addition, Fig. 7 is the control executed by control circuit 24
The flow chart of processing procedure sequence executes the control program when starting motor 10.
In Fig. 7, when processing proceeds to step S2, whether motor 10 is determined by synchronizing speed configuration part 56
Reversion.Here, whether judgement revolving speed is predetermined speed or more if it is determined that then handling and advancing to step S3 for "Yes".Here, if
It is determined as "Yes", then processing returns to arrive step S2.After, as long as motor 10 is to repeat in predetermined speed or more and reversion
Carry out the circulation of step S2, S3.For example, in the case where load device 40 is fan, it is possible to because of the flowing of outside air, wind
Fan is inverted with the speed more than predetermined speed.In this case, if make frequency converter 20 act, frequency converter 20 at
For overload state, therefore in the present embodiment act frequency converter 20.But when motor 10 is used for indoor equipment
Deng also can be omitted the processing of step S2, S3 in the case that a possibility that motor 10 is inverted is small.
If being determined as "No" in any one step in step S2, S3, handles and advance to step S4, pass through synchronization
Speed configuration part 56 executes starting processing.Hereinafter, the content that handles the starting of (a), (b) referring to Fig. 8 is illustrated.Fig. 8
(a) the motor torque T inMCharacteristic indicate started step S4 time point characteristic.As shown, starting in step S4
When, by synchronizing speed NSIt is set to be lower than object synchronization speed NXValue.
More particularly, it is preferable that making the synchronizing speed N for having started the time point of step S4SFor object synchronization speed NX's
0.01 times~0.3 times or so.Later, in step s 4, synchronizing speed NSIt is gradually increasing.Then, as synchronizing speed NSReach target
Synchronizing speed NXPredetermined value times (for example, 0.3 times~0.8 times) when, step S4 terminates.At the end of Fig. 8 (b) indicates step S4
Motor torque TMCharacteristic an example.
Therefore, illustrate the reason of executing starting processing (step S4) in the present embodiment.Generally, even if in halted state
It is lower by object synchronization speed NXIt is set as synchronizing speed NS, the equal induction conductivities of motor 10 obtain the feelings of sufficient detent torque
Condition is more.But become larger in initial start stage revolutional slip s, loss, the fever of motor 10 become larger.Therefore, in present embodiment
In, make synchronizing speed NSFrom lower than object synchronization speed NXSpeed start.
Then, in Fig. 7, when processing proceeds to step S6, whether revolutional slip s is determined by synchronizing speed configuration part 56
Insufficient predetermined value smax.Here, as shown in figure 5, can enter the range of unstable region from actual speed N, (actual speed N is not
Sufficient torque peak revolving speed NpRange) in select predetermined value smax.Here, predetermined value smaxIt both can be with synchronizing speed NSAccordingly
Setting, can also be regardless of synchronizing speed NSGround is set as identical value.When with synchronizing speed NSAccordingly set predetermined value smaxWhen, energy
It enough plays and synchronizing speed NSAccordingly apply optimal predetermined value smaxEffect.On the other hand, when regardless of synchronizing speed NSGround
By predetermined value smaxWhen being set as steady state value, the effect for the number of steps of reducing control program can be played.
When being determined as "Yes" in step s 6, processing proceeds to step S8, makes to synchronize by synchronizing speed configuration part 56
Speed NSClose to object synchronization speed NX.For example, by synchronizing speed NSIncrease and decrease predetermined step delta N.But in current synchronous speed
Spend NSObject synchronization speed N is had reachedXIn the case where, maintain current synchronizing speed NS。
On the other hand, when being determined as "No" in step s 6, processing proceeds to step S10, is set by synchronizing speed
Portion 56 makes synchronizing speed NSDecline.For example, by synchronizing speed NSReduce above-mentioned step delta N.By making synchronizing speed NSIt reduces, takes off
Movement from unstable region (referring to Fig. 5), a possibility that being transferred to the movement of stability region raising.After, repeat
The circulation of step S6~S10.
Here, being illustrated referring to concrete example to the movement of step S6~S10.In the timing (step for initially executing step S6
The timing that rapid S4 terminates), when making motor torque TMWith load torque TLWhen becoming shown in Fig. 8 (b), revolutional slip s deficiency is predetermined
Value smax(referring to Fig. 5), therefore it is determined as "Yes" in step s 6, increase synchronizing speed N in step s 8SIt is close to target
Synchronizing speed NX。
Step S8 is repeated in this way, as synchronizing speed NSWith object synchronization speed NXWhen consistent, motor torque TMWith it is negative
Set torque TLAs shown in Fig. 9 (a).After, as long as in load torque TLIn do not occur particularly changing, by synchronizing speed NSIt protects
It holds constant.
Here, ought load torque T for some reasonLWhen increasing, actual speed N becomes insufficient torque peak turn sometimes
Fast Np.Fig. 9 (b) indicates wherein an example.Load torque T shown in Fig. 9 (b)L1Characteristic and Fig. 9 (a) shown in load torque TL
Characteristic it is identical, load torque TL2Characteristic be for some reason increase after characteristic.Load torque TL2Revolutional slip s be
Predetermined value smaxMore than, therefore when then executing step S6, it is determined as "No", lowers synchronizing speed N in step sloS。
When repeating step S10, synchronizing speed NSIt is gradually reduced.Then, as load torque TL2Revolutional slip s not yet
Sufficient predetermined value smaxWhen, it is determined as "Yes" in step S6 again.Fig. 9 (c) indicates motor torque T at this timeMCharacteristic example.It
Afterwards, the reason of increasing load torque is eliminated, when the characteristic of load torque again returns to TL1When, step S8 is repeated, is returned
Return to synchronizing speed NSEqual to object synchronization speed NXState (Fig. 9 (a)).
The meaning > of < application motor 10
As described above, in the present embodiment, two-phase induction motor is applied as motor 10, makes main coil 12 and auxiliary
The impedance of index contour circle 14 is roughly the same, is illustrated to its meaning.
In air conditioner, it is desirable to be able to carry out air conditioning to entire room with small-sized machine box, it is more that therefore, it is desirable to air quantity, also
Wish that the maximum speed for the motor for rotating fan is also high.On the other hand, it from quietness, various function aspects, also deposits
The case where being rotated with low speed, therefore demand can arbitrarily change the motor of revolving speed.
Main coil and ancillary coil are wound on the magnetic pole of the stator of two-phase induction motor, apply identical difference to the two
Input voltage, thus rotor rotate.Generally, two-phase induction motor is designed under the premise of below: defeated to ancillary coil
Enter through the alternating voltage after changing phase to the alternating voltage for inputing to main coil into phase electricity container.As a result, as original
This power supply can be driven using only single phase alternating current power supply, therefore will pass through the induced electricity driven into phase electricity container
Motivation is known as " monocyclic-start induction motor ".
The above method used into phase electricity container as monocyclic-start induction motor is being added to two-phase induction motor
In, many times source power supply etc. is used as power supply.In the feelings of the power drives monocyclic-start induction motor by single-frequency
Under condition, using tap hair style motor winding, revolving speed can be changed by switching over to it.But in this approach, it needs
Has the tap of the quantity for the revolving speed for wanting to be driven, therefore, it is difficult to the multistage speed-changing.
In addition it is also possible to revolving speed be changed by phase control method, but since supply frequency itself does not change, so not
Only there is limitation in the amplitude of fluctuation of revolving speed, and there is also generate vibration caused by cogging torque (Cogging torque) or thus produce
Raw sound, or the problem of be easy to appear higher hamonic wave, restricted when changing revolving speed every time big.
There are also following methods: to two-phase induction motor application change pole motor, changing revolving speed by switching number of poles.
In the case where supply frequency is 50Hz, if 2 poles, then synchronizing speed can be changed to 3000rpm, and if 4 poles, then synchronizing speed is variable
For 1500rpm, if 6 poles, then synchronizing speed can be changed to 1000rpm, and if 8 poles, then synchronizing speed can be changed to 750rpm, but in original
Synchronizing speed is these speed fixed in reason, can not meticulously be set.In addition, there is also motor, structure is complicated, and valence
The high problem of lattice.
Two-phase induction motor is compared with other 3 phase motor etc., although being wanting in efficiency, and in practical specification side
Face wishes to consider fever, but haves the advantages that structure is simple and cheap.
Therefore, it has studied mode below: changing the frequency itself of input by frequency converter, be staggered to the input of each coil
The voltage of phase, thus drives two-phase induction motor.As long as frequency converter can arbitrarily be set to two-phase induction motor
The frequency of input, therefore can be realized the revolving speed for meeting the product demands such as air conditioner.
Using into phase electricity container to drive two-phase induction motor, it is desirable to according to the auxiliary line of motor
The impedance (inductor L, resistance R) of circle determines the capacity into phase electricity container.Appropriate condenser capacity is set, thus under becoming
Formula is such.
(main coil voltage)2+ (ancillary coil voltage)2=(capacitor voltage at both ends)2
On the other hand, in the case where being driven by frequency converter, there is the excellent of the phase that can arbitrarily adjust input
Point.Using two-phase induction motor while becoming cheap structure, becoming multistage speed-changing as DC motor
Structure, therefore by the way of through transducer drive two-phase induction motor.For converter circuit, use can be taken
Frequency converter IC available on the market also can be used in the elements such as IGBT, MOS-FET, GaN, the structure driven by SIC etc.
Deng.
For on the two-phase induction motor premised on being used together into phase electricity container, having studied from frequency converter to master
Coil, ancillary coil apply the case where alternating voltage of same amplitude.In this two-phase induction motor, the resistance of ancillary coil
It is anti-to be higher than main coil, therefore input current becomes smaller compared with main coil.The output decline of motor as a result, it is desirable to be used for
Improve the change of torque.As the method for improving torque, the method for considering that the input of main coil, ancillary coil is made to match.?
There are two types of methods for this, consider following two method: considering that the fluctuation of the impedance of main coil, ancillary coil, adjustment come from frequency converter
Output method, using main coil, ancillary coil the identical motor of impedance method.
The former the advantages of is the two-phase induction motor that can directly use finished product, but the disadvantage is that having the following problems:
Need each impedance coordination of the main coil for the two-phase induction motor that uses, ancillary coil from the output of frequency converter,
Keep each input current identical, and rectify as described above to source power supply, the voltage between lines obtained when exporting from frequency converter
Virtual value become source power supplyTimes, thus with by being driven into phase electricity container the case where compared with, obtain
Output it is small.Adjustment to main coil, ancillary coil output when, need to carry out by current detection circuit export electric current prison
The drive software of frequency converter is generated depending on or for each specification of product for using, each motor.Also, due to become with it is defeated
Enter the adjustment that the ancillary coil being lower matchingly limits the input of main coil, therefore in the case where wanting to increase torque, instead
And being possible to torque reduces.
About the latter, the roughly the same two-phase induction motor of impedance if it is main coil and ancillary coil can
It is driven, therefore is haveed the advantages that following with all identical circuits: do not needed for each product, each machine and use
Two-phase induction motor coordinated.In addition, as described later, the output torque bigger relative to the former can be obtained.About
Which is selected, can be selected according to the specification of the product group of application, but the mode of the latter can obtain more output torques,
And the specified of motor is also required minimum limit, therefore generally can inexpensively be constituted, therefore in the above-described embodiment,
Keep main coil 12, the impedance of ancillary coil 14 roughly the same.
Also, because increasing input current to improve torque, it is possible to improve torque by reducing coil impedance.This
When, in order to be enjoyed and the two-phase induction electric by phase advance capacitor driving from the induction conductivity driven by 3 phase inverter devices
The identical torque of the output torque of machine, it is known that need to make the impedance of the main coil and ancillary coil of induction conductivity to be at least and pass through
70% or less impedance when being driven into phase electricity container.
About motor, as long as the difficulty for keeping the specification of main coil, ancillary coil identical, therefore producing as a trial
It is low.In addition, the inductor of motor winding obtains inductance L by the way that conducting wire is wound in web-like on iron core.Therefore, inductance L with
The number of turns of coil is related.The resistance components R of motor winding is related to the resistance of wire rod, therefore can be by the change that keeps line footpath thicker
It is more adjusted, but the enlargement by making the outer diameter of the thicker coil of line footpath become larger, therefore occasionally result in motor itself.?
In the case where indoor unit for general home-use wall air conditioner, installation site, which exists, to be restricted, therefore is determining product
Outer dimension, in the case that the shape of motor becomes larger, it is desirable to the other components such as heat exchanger be made to become smaller.But make hot friendship
In the case that parallel operation becomes smaller, there are the drawbacks such as heat exchanger effectiveness decline.
The magnetic field generated and being powered to motor winding, is determined by the magnetic conductivity of the number of turns of motor winding, core material
It is fixed, therefore even if the folded thickness of increase core material can also be passed through in the case where the number of turns for reducing motor winding reduces inductance
To inhibit output torque to decline.However, in the case where making folded thickness become larger, it is electronic compared with the case where coil line footpath becomes larger
The shape of machine extremely becomes larger, and it is therefore possible to generate above-mentioned drawback.Therefore, the structure that can be minimized as far as possible is advantageous, because
It is advantageous to improve torque by changing folded thickness that this improves torque ratio by change coil.
Here, current waveform figure shown in 0~Figure 13 referring to Fig.1, illustrates to carry out two kinds of motor (sample 1, sample 2)
Result after verifying.The two-phase induction motor of sample 1 is comparative example, is the side by being driven into phase electricity container
Formula is the two-phase induction motor that can reach rotating speed of target by the input of single-phase AC230V.In addition, the two-phase sense of sample 2
Induction motor is the motor 10 for present embodiment, is in such a way that 3 phase inverter devices 20 drive, is single-phase by power supply
The input of AC230V can reach the two-phase induction motor of rotating speed of target.In the verification, target is in the state for being packed into real machine
Under, it is steadily acted under the load of 2.2Nm with 1200rpm.
When Figure 10 is indicated using two-phase induction motor (into phase electricity container use) for driving sample 1 into phase electricity container
The current waveform of each coil.
Synchronizing speed at this time is 1500rpm, actual speed 1295.4rpm, revolutional slip 0.136, main coil current
Amplitude is 0.8A, and ancillary coil current amplitude is 0.62A, and it is 62.7 DEG C that motor temperature, which rises (housing parts),.In the example
In, actual speed reaches target value (1200rpm).Temperature rises also within the allowable range.
In addition, Figure 11 indicates to drive the two-phase induction motor of sample 1 (into phase electricity container using the frequency converter 20 of 3 phases
With) when each coil current waveform.
Synchronizing speed at this time is 1364rpm, actual speed 1095rpm, revolutional slip 0.197, main coil current vibration
Width is 0.8A, and ancillary coil current amplitude is 0.55A, and it is 26 DEG C that motor temperature, which rises (housing parts),.In the example of Figure 11
In, motor output is insufficient, and actual speed (1095rpm) does not reach target value (1200rpm).
In addition, when Figure 12 indicates to drive two-phase induction motor (the frequency converter use) of sample 2 using the frequency converter 20 of 3 phases
The current waveform of each coil.
Synchronizing speed at this time is 1395rpm, actual speed 1234.56rpm, revolutional slip 0.115, main coil current
Amplitude is 0.8A, and ancillary coil current amplitude is 0.8A, and it is 47 DEG C that motor temperature, which rises (housing parts),.In the example of Figure 12
In, actual speed reaches target value (1200rpm), and temperature rises also within the allowable range.
In addition, when Figure 13 is indicated using two-phase induction motor (the frequency converter use) for driving sample 2 into phase electricity container
The current waveform of each coil.
Synchronizing speed at this time is 1500rpm, actual speed 1371rpm, revolutional slip 0.086, main coil current vibration
Width is 1.2A, and ancillary coil current amplitude is 1.2A.But motor temperature rises to 100 DEG C or more, temperature protection movement.
In the example of Figure 13, the target value (1200rpm) of revolving speed is reached, but generate heat sharply, it is difficult to say it is steadily to be acted.
According to above result of study it is found that being use into phase electricity consumption in the mode for general driving two-phase induction motor
It is the case where container and by the case where transducer drive two-phase induction motor, main required for identical output in order to obtain
Coil is different with the specification of ancillary coil.This is because applying voltage compared with the case where directly inputting source power supply as described later
Virtual value be lower.
In addition, demonstrating following situations according to above result of study: the master of two-phase induction motor used in adjusting
The impedance of coil and ancillary coil, thus become by into phase electricity container drive when two-phase induction motor it is following
Value, this by the transducer drive used under same power supply for being enjoyed by driving two-phase induced electricity into phase electricity container
It is effective for the output torque that can be enjoyed when motivation.
Inductance L: about 70% hereinafter, about 50% or less in ancillary coil in main coil
Resistance value R: about 85% hereinafter, about 60% or less in ancillary coil in main coil
Impedance Z: about 50% hereinafter, about 35% or less in ancillary coil in main coil
As described above, the specification of ancillary coil and main coil matches, therefore investigated according to the result of main coil.Sense
The impedance of the coil of induction motor is determined by the line footpath and the number of turns of coil of coil, folded thickness, therefore inductance same resistance value
Different induction conductivity etc. can arbitrarily adjust impedance.However, in fact, folding the shape of thick change and induction conductivity
There is very big relationship, therefore extreme change can not be carried out.This is because this electrodynamic induction machine is used for wall air conditioner.
Currently, the shape limited size of air conditioner is in the installation space of the wall of general family, therefore can not extremely become larger.
The in shortage to make transducer drive mode and capacitor into phase of torque is only coped with by changing folded thickness therefore, it is impossible to realize
Mode is identical.In addition, folding thick and solid existing torque by change rises to 20% or so.When consideration is by changing folded thick realization
It when the raising of torque 20%, can be exported according to above result of study: in order to by the frequency converter used under same power supply
Driving is come output torque enjoyable when enjoying by driving two-phase induction motor into phase electricity container, even if logical considering
Cross the folded thick of motor and in the case where the raising of the torque 20% of realization, it is also desirable to make 70% or less the impedance of coil.
In addition, similarly demonstrating following situations: the main coil and auxiliary line of two-phase induction motor used in adjusting
The impedance of circle, to become the following value of two-phase induction motor when passing through transducer drive, this is for by same
The driving into phase electricity container used under power supply can be enjoyed when carrying out transducer drive to two-phase induction motor to enjoy
Output torque for be effective.
Inductance L: about 150% or more in main coil, about 200% or more in ancillary coil
Resistance value R: about 120% or more in main coil, about 180% or more in ancillary coil
Impedance Z: about 210% or more in main coil, about 300% or more in ancillary coil
The case where exporting sine wave from frequency converter is described above, but if not having in real machine, temperature rises, high frequency is made an uproar
In the case where the problems such as sound, can add increases the peak value of input voltage by ovennodulation as generally known technology
Control.
< application examples >
(application examples 1)
Then, illustrate the example that the motor drive A1 of present embodiment is applied to various equipment.
The two-phase induction motor of present embodiment is applied to use at supply voltage AC200V firstly, illustrating
The case where air-supply fan of the indoor unit of air conditioner.
According to the maximum quantity of wind of the indoor unit of air conditioner required in product specification, it is set as two-phase induction motor
Needing revolving speed is 1500rpm, and the output torque of the two-phase induction motor needed at this time is 2.2Nm.
If it is it is common driven into phase electricity container by way of, by changing pole in the known manner
Number, can periodically change synchronizing speed.For example, synchronizing speed can be interim in the case where supply frequency is 50Hz
Ground is changed to 3000rpm, 1500rpm, 750rpm.This rotating speed of target is 1500rpm, but induction conductivity is produced because of load
Raw revolutional slip, therefore even if being driven with synchronizing speed 1500rpm, since revolutional slip is not up to 1500rpm.In addition, research
The case where using 2 pole induction conductivity that synchronizing speed is 3000rpm.At this point, had adjusted in real machine operating point to
In the case that 1500rpm is acted, revolutional slip 0.5, therefore generation efficiency deteriorates caused the problems such as generating heat.Also,
Supply frequency be 60Hz in the environment of in use, there are problems that the design of revolving speed changes.According to above result of study,
Stable output in order to obtain can be realized high efficiency by the way of through transducer drive two-phase induction motor.
At this point, the output voltage of the coil to two-phase induction motor based on frequency converter output isIn addition, being when setting the loss in rectification circuit and converter circuit as 10%
It supplements the loss and subtracts 141.42 [V] × 0.1=14.142 [v], using the input for passing through AC127.278V or more, Neng Goujin
The motor of the output of row load torque 2.2Nm, revolving speed 1500rpm, the frequency converter of Xiang Yingyong present embodiment are attached.
At this point, the maximum output of load torque 2.2Nm and revolving speed 1500rpm and the frequency converter assembled in this air conditioner
When the exportable maximum output of two-phase induction motor it is roughly equal.Therefore, cheap two-phase induction electric can not only be used
Machine realizes the structure that can arbitrarily change revolving speed, additionally it is possible to inhibit to exceed the required induction conductivity exported greatly or super due to application
Rising of price caused by required efficient frequency converter etc. etc. out.
(application examples 2)
Then, it illustrates institute in the blowing fan of the outdoor unit of the air conditioner used at supply voltage AC200V, 50Hz
What is used is replaced into frequency converter by the two-phase induction motor driven into phase electricity container mode and passes through transducer drive
Two-phase induction motor when example.
If the revolving speed for passing through the two-phase induction motor driven into phase electricity container mode is 900rpm, load at this time is
3.5N·m.Accordingly, with respect to the required output of the two-phase induction motor by transducer drive, if required maximum (top) speed is
900rpm, max. output torque 3.5Nm.
At this point, as described above, in the two-phase induction motor by being used into phase electricity container mode, ancillary coil
Impedance is higher than main coil, therefore in the two-phase induction motor for transducer drive, is set so that main coil and auxiliary
The impedance of index contour circle is roughly the same.
Thick situation is folded in addition, illustrating do not change motor in the present example.In addition, setting smooth circuit and frequency converter electricity
Loss in road is sufficiently small.As described above, inputing to two-phase sense in the case where passing through transducer drive two-phase induction motor
The voltage of induction motor is when being driven by phase advance capacitorInput impedance phase simultaneously, it is fixed according to ohm
Rule, coil current are alsoTimes.
As described above, the magnetomotive force of motor poles is related to current value in the case where inductance L and R constant.Therefore,
In order to obtain identical output in the case where transducer drive, it is defeated to obtain identical electric current to need to adjust coil impedance
Enter.Therefore, according to Ohm's law, it is known that by the main coil and auxiliary line that make the two-phase induction motor by transducer drive
The impedance of circle isTimes, identical input current can be obtained.Therefore, make the two-phase induction electric by transducer drive
The coil of machine it is linear it is thicker reduce conducting resistance, be thus by the impedance adjustment of main coil and ancillary coilCome again
It uses.Even if as a result, for transducer drive, also can be realized have with by being used into phase electricity container mode
The air conditioner of the two-phase induction motor of the identical transducer drive mode of maximum output when two-phase induction motor.
(application examples 3)
Then, research will be converter circuit and two-phase into the structure replacing of phase electricity container and two-phase induction motor
When induction conductivity, the situation of the folded thickness of induction conductivity is changed together.Therefore, research is in item identical with above application examples 2
Under part, example when the folded thickness of induction conductivity is changed together.
If the revolving speed for passing through the two-phase induction motor driven into phase electricity container mode is 900rpm, load at this time is
3.5N·m.Accordingly, with respect to the required output of the two-phase induction motor by transducer drive, make required maximum (top) speed
900rpm, max. output torque 3.5Nm.
Relative to the induction conductivity by using into phase electricity container, increase the two-phase sense driven by converter circuit
The folded thickness of induction motor.Consider through the change output torque estimated the case where increasing by 15%.
Because being driven by frequency converter, the two-phase induction motor for transducer drive, which is carried out similarly, to be set
Determine so that the impedance of main coil and ancillary coil is roughly the same.Similarly, passing through transducer drive two-phase induction motor
In the case of, the voltage inputted to two-phase induction motor is when being driven by phase advance capacitorIt is identical in input impedance
When, according to Ohm's law, coil current is alsoTimes.
As described above, the magnetomotive force of motor poles is related to current value in the case where inductance L and R constant.Therefore upper
It states in example 2 for transducer drive in order to obtain with output identical when being driven by phase advance capacitor mode, adjusts
Whole coil impedance increases 15% due to folding thick change output torque to obtain identical electric current input, but in this example, because
This considers the increase of the torque, is according to the following formula 0.601 times about the adjustment of current value.
That is, the coil about the two-phase induction motor used in the case where transducer drive, according to ohm
Law, the 0.601 of the impedance of two-phase induction motor when can carry out setting to become into phase electricity container driving method
Times.
(application examples 4)
Also, it studies in the structure shown in above application examples 1, example when its movement is made using revolutional slip limiter.
As application examples 1, for target value, act two-phase induction motor by transducer drive mode
When, synchronizing speed and reality that the frequency converter and two-phase induction motor of application are inputted according to the frequency converter under above-mentioned rated condition
Revolving speed determines revolutional slip.
It is passed as described above, the two-phase induction motor of present embodiment is built-in with according to such as Hall that revolving speed is exported
Sensor etc. can confirm actual speed by control microcomputer.At this point, when being chased after on software of the control with microcomputer
In the case where the limiter for having added revolutional slip, the revolutional slip value and movement in the state of being acted with nominal load are confirmed
When load change, set limits value.
In actual movement, apply the driving current of the synchronizing speed lower than rotating speed of target to motor as described above.
Induction conductivity stops, therefore is 1 in electric current application time point revolutional slip, but do not apply the limiter of revolutional slip on startup.
Control when about induction conductivity starting has various methods, therefore any setting.While confirming actual speed, until
Actual speed reaches rotating speed of target or improves synchronizing speed until revolutional slip reaches limits value.When the acceleration in induction conductivity
In the case that revolutional slip has reached limits value in journey, or because of revolving speeds such as the variations of load after actual speed reaches rotating speed of target
Decline, in the case that revolutional slip reaches limits value, the synchronizing speed of input is matchingly reduced with revolutional slip so that revolutional slip not
More than limits value, thus steadily acted in the state that revolutional slip is no more than limits value.
The rated output of the clear induction conductivity used in air conditioner, i.e. maximum speed and output torque at this time
The considerations of method.In the induction conductivity for being connected to load, as it is known, corresponding to the weight of load relative to input
Synchronizing speed generate revolutional slip, therefore maximum speed is determined according to load.The two-phase induction motor of present embodiment is used
The load torque of blowing fan in the blowing fan of indoor machine of air conditioner, therefore when being rotated with scheduled revolving speed and two-phase incude
The output torque of motor is identical.The circulating fan used in air conditioner becomes the T of Fig. 6LShown in load torque.In addition,
In the present embodiment, propose and illustrate the case where using circulating fan as blowing fan, but the two-phase of present embodiment
Induction conductivity corresponds only to the load of connection, obtains maximum speed and output torque, therefore as two-phase induction motor
Load can cope with the so-called loads such as propeller fan, driven compressor induction conductivity.
The two-phase induced electricity that is connect with the reflux fan of the indoor unit of air conditioner shown in actual measurement in the present embodiment
When the maximum speed of motivation, which is equipped on the air conditioner of application, is actually carrying out air conditioning
The condition that condition, the i.e. position of wind direction board, the load of air suction inlet, the load of blow-off outlet etc. use on actual product
Under, induction conductivity is acted by arbitrary driving method.Thereby, it is possible to drive explicitly by arbitrary driving method
Maximum speed and output torque when induction conductivity.
In addition, arbitrary driving method said here is either use the voltage that can arbitrarily set voltage, frequency
Source, current source method, be also possible to using monitor output while can carry out the controls such as phase controlling frequency converter side
Method can also use and meet the method that measurement is intended to.
For example, in the present embodiment, being considered as the case where power supply uses the air conditioner of AC200V of source power supply.This
When, prepare to the main coil of motor141.4V AC power source.At this point, the power supply use of 141.4V comes from
The various power supplys such as output, the converter power supply of slide transformer.The power supply of the AC141.4V is connected, to main coil in order to by phase
90 DEG C of position change, rotates induction conductivity to ancillary coil connection via capacitor from the power supply of the AC141.4V.In addition,
About direction of rotation at this time, it is set as the direction that air conditioner is blown in usual operation.In this state, wind direction board is set
Become the operating status of air conditioner, and load torque according to induction conductivity maximum speed and at this time with setting place
Measure the output torque of induction conductivity.In addition, the AC power source of the AC141.4V arbitrarily changes frequency, induction electric is searched for
The revolving speed of machine becomes highest point.By at this time revolving speed and output torque be set as maximum speed and rated output torque.
The effect > of < embodiment
As described above, the two-phase induction motor (10) of present embodiment is characterized in that,
With main coil (12) and ancillary coil (14),
The two-phase induction motor is used for air conditioner, which has: rectification circuit (26), to commercial ac power source
(30) alternating voltage is rectified；Induction motor drive circuit (20) is straight to exporting from above-mentioned rectification circuit (26)
Galvanic electricity pressure (Edc) is switched, respectively the 1st different voltage (V of output phaseU), the 2nd voltage (VV) and the 3rd voltage (VW)；With
And the blowing fan (40,103) as driven object,
When output torque when by maximum speed occur is set as rated output torque, set above-mentioned main coil (12) and
The impedance value of above-mentioned ancillary coil (14), thus being applied with above-mentioned quotient to above-mentioned main coil (12) and above-mentioned ancillary coil (14)
The above-mentioned alternating voltage exported with AC power source (30)Obtained in the state of voltage below again above-mentioned maximum speed with
And above-mentioned rated output torque.
In addition, being characterized in that, above-mentioned maximum speed is following revolving speed:
Apply the virtual value with above-mentioned commercial ac power source (30) to above-mentioned main coilThe master of virtual value again
Coil applies voltage (VU-V), Xiang Shangshu ancillary coil, which applies, applies voltage (V relative to above-mentioned main coilU-V) make a reservation for into the auxiliary of phase
Index contour circle applies voltage (VW-V), it blows from the said fan (40,103) being connect with above-mentioned two-phase induction motor
In the case where, so that above-mentioned main coil is applied voltage (VU-V) and above-mentioned ancillary coil application voltage (VW-V) changeable frequency when obtain
Revolving speed in highest revolving speed.
In addition, two-phase induction motor (10) is characterized in that, in the impedance and above-mentioned auxiliary line of above-mentioned main coil (12)
Enclose in the impedance of (14), high impedance be 1.25 times of low impedance hereinafter,
It is preferred that the impedance of above-mentioned main coil (12) and the impedance of above-mentioned ancillary coil (14) are roughly the same.
Thereby, it is possible to realize the two-phase induction motor for being suitable for the driving of frequency converter (20).
In addition, the air conditioner of present embodiment is characterized in that, have two-phase induction motor (10),
Above-mentioned induction motor drive circuit (20) has the frequency converter for being able to carry out three-phase output,
Apply above-mentioned 1st voltage (V to one end of above-mentioned main coil (12)U),
Apply above-mentioned 3rd voltage (V to one end of above-mentioned ancillary coil (14)W),
The other end of the other end and above-mentioned ancillary coil (14) to above-mentioned main coil (12) applies above-mentioned 2nd voltage
(VV),
Above-mentioned 2nd voltage (VV) than above-mentioned 1st voltage (VU) the 1st period of delay, above-mentioned 3rd voltage (VW) than above-mentioned 2nd electricity
Press (VV) the 2nd period of delay.
In addition, the air conditioner of present embodiment is characterized in that having:
Rectification circuit (26) rectifies the alternating voltage of commercial ac power source (30), exports DC voltage
(Edc)；
Frequency converter (20) switchs above-mentioned DC voltage (Edc), exports the 1st voltage (VU), the 2nd voltage (VV)、
3rd voltage (VW)；
Two-phase induction motor (10), with main coil (12) and ancillary coil (14)；And
Blowing fan (40,103), connect with above-mentioned two-phase induction motor (10),
Apply above-mentioned 1st voltage (V to one end of above-mentioned main coil (12)U),
Apply above-mentioned 3rd voltage (V to one end of above-mentioned ancillary coil (14)W),
The other end of the other end and above-mentioned ancillary coil (14) to above-mentioned main coil (12) applies above-mentioned 2nd voltage
(VV),
Above-mentioned 2nd voltage (VV) than above-mentioned 1st voltage (VU) the 1st period of delay, above-mentioned 3rd voltage (VW) than above-mentioned 2nd electricity
Press (VV) the 2nd period of delay,
Flow through the virtual value of the virtual value and the electric current for flowing through above-mentioned main coil (12) of the electric current of above-mentioned ancillary coil (14)
It is roughly the same.
Thereby, it is possible to high-efficiency operation air conditioner.
In addition, the air conditioner of present embodiment is characterized in that having:
Control circuit (24) controls above-mentioned frequency converter (20)；And
Speed probe (16) measures the actual speed (N) of above-mentioned two-phase induction motor (10),
Above-mentioned control circuit (24) makes the synchronous speed of above-mentioned two-phase induction motor (10) corresponding to above-mentioned actual speed (N)
Spend (NS) increase and decrease.
Thereby, it is possible to realize control corresponding with actual speed (N).
In addition, above-mentioned frequency converter (20) is characterized in that, controlled by ovennodulation, exports above-mentioned commercial ac power source (30)
The peak value of the above-mentioned alternating voltage of outputTimes or more crest voltage.
Thereby, it is possible to make two-phase induction motor (10) high-speed cruising as needed.
In addition, being characterized in that, above-mentioned 1st period and substantially " 1/4 " period in above-mentioned 2nd period.
Thereby, it is possible to run air conditioner with higher efficiency.
In addition, being characterized in that, above-mentioned frequency converter (20) carries out the switch of 15kHz or more.
Thereby, it is possible to reduce ear-piercing noise.
In addition, above-mentioned control circuit (24) is characterized in that, comprising:
Revolutional slip calculation part (54), according to above-mentioned actual speed (N) and above-mentioned synchronizing speed (NS) calculate above-mentioned two-phase
The revolutional slip (s) of induction conductivity (10)；And
Synchronizing speed configuration part (56) is predetermined value (s in above-mentioned revolutional slip (s)max) more than in the case where, make above-mentioned
Synchronizing speed (NS) reduce.
As a result, when revolutional slip s becomes larger, synchronizing speed N can be madeSIt reduces, inhibits loss and fever.
In addition, above-mentioned control circuit (24) is characterized in that, comprising:
Target velocity configuration part (58) sets the object synchronization speed (N of above-mentioned two-phase induction motor (10)X),
Above-mentioned synchronizing speed configuration part (56), which includes, sets above-mentioned synchronization when starting above-mentioned two-phase induction motor (10)
Speed (NS) make it below above-mentioned object synchronization speed (NX) function and until above-mentioned synchronizing speed (NS) reach above-mentioned mesh
Mark synchronizing speed (NX) or above-mentioned revolutional slip (s) become above-mentioned predetermined value (smax) more than until, make above-mentioned synchronizing speed (NS) increase
The function of adding.
Thereby, it is possible to reduce loss and fever when starting.
In addition, above-mentioned two-phase induction motor (10) is characterized in that, there is torque characteristics below: turning in above-mentioned reality
Fast (N) reaches above-mentioned synchronizing speed (N from zeroS) during torque peak revolving speed (Np) in motor torque (TM) in occur
Peak value, above-mentioned predetermined value (smax) it is in above-mentioned torque peak revolving speed (Np) revolutional slip (s) more than value.
Thereby, it is possible to act motor 10 in stability region, in the loss and fever for inhibiting motor 10
Meanwhile, it is capable to continue drive motor 10.
[the 2nd embodiment]
Then, referring to Fig.1 block diagram shown in 4 to the major part of the air conditioner of the 2nd embodiment of the invention, that is, electronic
The structure of machine actuating device A2 is illustrated.
Compared with the motor drive A1 (referring to Fig.1) of the 1st embodiment, the motor drive of present embodiment is filled
2 smoothing capacity devices 28a, 28b that A2 is connected with series connection on the output terminal of rectification circuit 26 are set, to replace 1 to put down
Sliding capacitor 28.By the voltage of the tie point of smoothing capacity device 28a, 28b directly as V phase voltage VVTo be applied to motor
10。
In addition, in the present embodiment, the frequency converter 20 of the 1st embodiment is replaced using frequency converter 21.Frequency converter 21 is
The voltage V of output U phase, W phaseU、VW, there is switch element 22a, 22b, 22e, 22f, but switch member not corresponding with V
Part.The structure of motor drive A2 other than the above is identical as the structure of motor drive A1 of the 1st embodiment.
The voltage V of (a) of Figure 15~(e) expression present embodimentU、VV、VWAnd voltage between lines VU-V、VW-VWaveform.As shown,
In the present embodiment, W phase voltage VWPhase relative to U phase voltage VUAdvance 90 °.
Pass through the motor drive A2 of present embodiment, voltage between lines VU-V、VW-VAmplitude less than the 1st embodiment
Motor drive A1.But have quantity (4) of the switch element 22 that can make to be arranged in frequency converter 21 less than the
The effect of quantity (6) in the frequency converter 20 of 1 embodiment, it is especially advantageous in the case where required motor torque is small.
[the 3rd embodiment]
Then, the structure of the air conditioner A of 6 pairs of the 3rd embodiments of the invention is illustrated referring to Fig.1.In addition, Figure 16 is
The main view of the air conditioner A of present embodiment.
Present embodiment is that motor drive A1, A2 in above-mentioned the first and second embodiments are used for air conditioner A
Example.
As shown in figure 16, air conditioner A has indoor unit 100, outdoor unit 200, remote controler Re.Indoor unit 100 and outdoor unit
200 by refrigerant piping connection (not shown), the indoor progress by well known refrigerant circulation to indoor unit 100 is provided with
Air conditioning.In addition, indoor unit 100 and outdoor unit 200 are mutually received and sent messages via communication cable (not shown).
Remote controler Re sends infrared signal by user's operation, to the remote controler receiving and transmitting part Q of indoor unit 100.The signal
Content is to run the instructions such as request, the change of set temperature, timer, the change of operational mode, stopping request.Air conditioner A root
According to these signals, the operation of air conditioner such as refrigeration mode, heating mode, dehumidification mode are carried out.In addition, from the remote controler of indoor unit 100
Receiving and transmitting part Q sends the data such as room temperature information, humidity information, electricity charge information to remote controler Re.
Figure 17 is the side cross-sectional view of indoor unit 100.Housing base 101 is accommodated with heat exchanger 102, blowing fan 103, filtering
The internal structures bodies such as device 108.
Heat exchanger 102 has more heat-transfer pipe 102a, makes the air being taken into indoor unit 100 by blowing fan 103
Heat exchange is carried out with the refrigerant flowed in heat-transfer pipe 102a, above-mentioned air is heated or cooled.In addition, heat-transfer pipe
102a is connected to above-mentioned refrigerant piping (not shown), constitutes a part of well known refrigerant circulation (not shown).
Left and right wind direction plate 104 is according to the instruction for coming from indoor unit microcomputer (not shown), to be set to the rotation of lower part
Shaft (not shown) is fulcrum, is rotated by left and right wind direction plate with motor (not shown).
Up-down wind direction board 105 is according to the instruction for coming from indoor unit microcomputer (not shown), to be set to both ends
Rotation axis (not shown) is fulcrum, is rotated by up-down wind direction board with motor (not shown).
Front panel 106 is configured to before covering indoor unit 100, and becoming can be by front panel with electronic by axis of lower end
The structure that machine (not shown) is rotated.By the way, front panel 106 can also be fixed on lower end.
It is rotated by blowing fan 103 shown in Figure 17, is taken into interior via air suction inlet 107 and filter 108
Air will be carried out the air after heat exchange by heat exchanger 102 and be guided to blowout wind path 109a.Also, it is directed to blowout
The air of wind path 109a adjusts wind direction by left and right wind direction plate 104 and up-down wind direction board 105, passes out to from air blow-off outlet 109b
Outside is come to indoor carry out air conditioning.
In addition, an example of the only present embodiment of the structure of air conditioner A shown in Figure 16, Figure 17, naturally it is also possible to
Form for all air conditioners.
Figure 18 is the block diagram for indicating the structure of major part of the air conditioner A comprising control unit 140.
For example, control unit 140 includes ROM (Read Only Memory, read-only memory), RAM (Random Access
Memory, random access memory) etc..Storage unit 150 stores various information.Also, by the arithmetic processing section of control unit 140
CPU (Central Processing Unit, central processing unit) in 145 reads program stored in ROM, in RAM
It is unfolded and executes.Temperature etc. inside and outside 170 measuring cell of sensor.
For example, load 160 has including indoor blowing fan motor 161, outdoor unit 200 that indoor unit 100 has
Air compressor motor 162, being set to the wind direction board of up-down wind direction board 105, (above-mentioned up-down wind direction board is with electronic with motor 163
Machine and left and right wind direction plate motor).This is driven according to the driving signal inputted from the drive control part 146 of control unit 130
A little loads 160.
The drive control part 146 and load 160 correspond to the motor drive in above-mentioned the first and second embodiments
A1,A2.It therefore, according to the present embodiment, can be whiles inhibiting fever etc., with high efficiency driving load 160.
[variation]
The present invention is not limited to above-mentioned embodiments, can carry out various modifications.Above-mentioned embodiment example be in order to
The detailed description for being easy to understand the present invention and carrying out is not necessarily required to all structures for having illustrated.In addition it is also possible to will
A part of the structure of certain embodiment is replaced as the structure of other embodiments, also, can also be to the structure of certain embodiment
Increase the structure of other embodiments.Furthermore, it is possible to delete a part of the structure of each embodiment, or carry out other
Addition, the displacement of structure.For example, the deformation that can be carried out to above embodiment is as shown below.
(1) in above-mentioned the first and second embodiments, control circuit 24 includes target velocity configuration part 58.But it is also possible to
Keep other epigyny device (not shown) comprising target velocity configuration part 58.Control circuit 24 becomes as a result, receives according to from outside
The object synchronization speed N arrivedXThe device of drive motor 10 is easy to realize by universal integrated circuit.
(2) in the respective embodiments described above, it illustrates the example as the application two-phase induction motor of motor 10, but makees
Other induction conductivities such as three phase induction motor also can be used for motor 10.In addition, motor drive A1, A2
Circuit structure is example, rectification circuit 26, frequency converter 20,21 can also be replaced as other structures.
(3) in the respective embodiments described above, in order to calculate revolutional slip s, the speed probes such as Hall sensor 16 are used
Detect the actual speed N of motor 10.However, it is known that the method for the revolving speed of various detection induction conductivities, it can also be by appointing
Where method detects actual speed N.Furthermore, however it is not limited in speed probes such as the inside built-in Hall sensors of motor 10
16, speed probe 16 can also be arranged in the outside of motor 10.
(4) hardware of the control circuit 24 in above-mentioned the first and second embodiments can be realized by general computer,
Therefore the program etc. of flow chart shown in Fig. 7 can also be stored in a storage medium, or is issued via transmission lines.
(5) it about processing shown in Fig. 7, is said in the above-described embodiment as the software processing using program
It is bright, but can also be replaced by part of it or all using ASIC (Application Specific Integrated
Circuit, specific integrated circuit) or FPGA (field-programmable gate array, field programmable gate array) etc.
Hardware processing.
(6) in addition, motor drive A1, A2 of the first and second embodiments can be applied not only to the 3rd embodiment
Air conditioner A, also can be applied to ventilation fan, refrigeration machine, washing machine, sweeper, industrial machinery, electric car, rail truck,
Ship, elevator, the various electronic equipments such as escalator.It can be played as a result, according to its purposes in these electronic equipments superior
Performance.
Claims (14)
1. a kind of two-phase induction motor, which is characterized in that
With main coil and ancillary coil,
The two-phase induction motor is used for air conditioner, which has: rectification circuit, to the alternating current of commercial ac power source
Pressure is rectified；Induction motor drive circuit switchs the DC voltage exported from above-mentioned rectification circuit, defeated respectively
Phase different the 1st voltage, the 2nd voltage and the 3rd voltage out；And the blowing fan as driven object,
When output torque when by maximum speed occur is set as rated output torque, above-mentioned main coil and above-mentioned auxiliary line are set
The impedance value of circle, thus in the above-mentioned friendship for being applied with above-mentioned commercial ac power source output to above-mentioned main coil and above-mentioned ancillary coil
Galvanic electricity pressureAbove-mentioned maximum speed and above-mentioned rated output torque are obtained in the state of voltage below again.
2. two-phase induction motor according to claim 1, which is characterized in that
Above-mentioned maximum speed is following revolving speed:
Apply the virtual value with above-mentioned commercial ac power source to above-mentioned main coilThe main coil of virtual value again applies
Voltage, Xiang Shangshu ancillary coil applies to be made a reservation for apply voltage into the ancillary coil of phase relative to above-mentioned main coil application voltage,
In the case where being blown from the said fan being connect with above-mentioned two-phase induction motor, make above-mentioned main coil apply voltage and
Above-mentioned ancillary coil applies the highest revolving speed in the revolving speed obtained when alive changeable frequency.
3. two-phase induction motor according to claim 1 or 2, which is characterized in that
In the impedance of above-mentioned main coil and the impedance of above-mentioned ancillary coil, high impedance is 1.25 times or less of low impedance.
4. two-phase induction motor according to claim 3, which is characterized in that
In the impedance of above-mentioned main coil and the impedance of above-mentioned ancillary coil, high impedance is 1.05 times or less of low impedance.
5. a kind of air conditioner, which is characterized in that
With two-phase induction motor described in any one in Claims 1-4,
Above-mentioned induction motor drive circuit has the frequency converter for being able to carry out three-phase output,
Apply above-mentioned 1st voltage to one end of above-mentioned main coil,
Apply above-mentioned 3rd voltage to one end of above-mentioned ancillary coil,
The other end of the other end and above-mentioned ancillary coil to above-mentioned main coil applies above-mentioned 2nd voltage,
Above-mentioned 2nd voltage is than above-mentioned the 1st period of 1st voltage delay, and above-mentioned 3rd voltage is than above-mentioned the 2nd period of 2nd voltage delay.
6. a kind of air conditioner, which is characterized in that have:
Rectification circuit rectifies the alternating voltage of commercial ac power source, exports DC voltage；
Frequency converter switchs above-mentioned DC voltage, the 1st voltage of output, the 2nd voltage and the 3rd voltage；
Two-phase induction motor, with main coil and ancillary coil；And
Blowing fan is connect with above-mentioned two-phase induction motor,
Apply above-mentioned 1st voltage to one end of above-mentioned main coil,
Apply above-mentioned 3rd voltage to one end of above-mentioned ancillary coil,
The other end of the other end and above-mentioned ancillary coil to above-mentioned main coil applies above-mentioned 2nd voltage,
Above-mentioned 2nd voltage than above-mentioned the 1st period of 1st voltage delay, above-mentioned 3rd voltage than above-mentioned the 2nd period of 2nd voltage delay,
By setting the impedance value of above-mentioned main coil and above-mentioned ancillary coil, make the virtual value for flowing through the electric current of above-mentioned ancillary coil
In the virtual value for the electric current for flowing through above-mentioned main coil, high current effective value is 1.05 times or less of low current effective value.
7. air conditioner according to claim 5 or 6, which is characterized in that
Have:
Control circuit controls above-mentioned frequency converter；And
Speed probe measures the actual speed of above-mentioned two-phase induction motor,
Above-mentioned control circuit, which corresponds to above-mentioned actual speed, increases and decreases the synchronizing speed of above-mentioned two-phase induction motor.
8. air conditioner according to claim 7, which is characterized in that
Above-mentioned control circuit has:
Revolutional slip calculation part calculates the slip of above-mentioned two-phase induction motor according to above-mentioned actual speed and above-mentioned synchronizing speed
Rate；And
Synchronizing speed configuration part reduces above-mentioned synchronizing speed in the case where above-mentioned revolutional slip is predetermined value or more.
9. air conditioner according to claim 8, which is characterized in that
Above-mentioned control circuit has target velocity configuration part, which sets the mesh of above-mentioned two-phase induction motor
Synchronizing speed is marked,
Above-mentioned synchronizing speed configuration part is included to be set above-mentioned synchronizing speed and makes it below in the starting of above-mentioned two-phase induction motor
The function of above-mentioned object synchronization speed and until above-mentioned synchronizing speed reach above-mentioned object synchronization speed or above-mentioned revolutional slip at
Until more than above-mentioned predetermined value, make the increased function of above-mentioned synchronizing speed.
10. air conditioner according to claim 9, which is characterized in that
Above-mentioned two-phase induction motor has torque characteristics below: reaching above-mentioned synchronizing speed from zero in above-mentioned actual speed
During torque peak revolving speed, occur peak value in motor torque,
Above-mentioned predetermined value is the value more than the revolutional slip of above-mentioned torque peak revolving speed.
11. air conditioner according to claim 5, which is characterized in that
It includes
Determine induction conductivity revolutional slip whether be predetermined value or more function, wherein induction conductivity have below turn
Square characteristic: torque peak revolving speed during actual speed reaches synchronizing speed from zero occurs in motor torque
Peak value；
In the case where above-mentioned revolutional slip insufficient above-mentioned predetermined value, make above-mentioned synchronizing speed close to specified object synchronization speed
Function；And
In the case where above-mentioned revolutional slip is above-mentioned predetermined value or more, the function of reducing above-mentioned synchronizing speed,
Above-mentioned predetermined value is the value more than the revolutional slip of above-mentioned torque peak revolving speed.
12. air conditioner according to claim 5, which is characterized in that
Above-mentioned frequency converter is controlled by ovennodulation, exports the peak value of the above-mentioned alternating voltage of above-mentioned commercial ac power source outputTimes or more peak value voltage.
13. air conditioner according to claim 5, which is characterized in that
Above-mentioned 1st period and above-mentioned 2nd period are 1/4 period ± 5%.
14. air conditioner according to claim 5, which is characterized in that
Above-mentioned frequency converter carries out the switch of 15kHz or more.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-231679 | 2015-11-27 | ||
| JP2015231679A JP6530306B2 (en) | 2015-11-27 | 2015-11-27 | Two-phase induction motor, air conditioner having two-phase induction motor and program |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106817065A CN106817065A (en) | 2017-06-09 |
| CN106817065B true CN106817065B (en) | 2019-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610596077.9A Active CN106817065B (en) | 2015-11-27 | 2016-07-27 | Two-phase induction motor, the air conditioner for having two-phase induction motor |
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| Country | Link |
|---|---|
| JP (1) | JP6530306B2 (en) |
| CN (1) | CN106817065B (en) |
| MY (1) | MY178174A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6822430B2 (en) * | 2018-02-19 | 2021-01-27 | 株式会社デンソー | Control device for pole switching motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112588A (en) * | 2000-10-02 | 2002-04-12 | Matsushita Refrig Co Ltd | Freezing system controller |
| CN1450716A (en) * | 2002-03-14 | 2003-10-22 | 三垦电气株式会社 | Converter and control method |
| JP2005184885A (en) * | 2003-12-16 | 2005-07-07 | Matsushita Electric Ind Co Ltd | Drive controller of motor |
| JP2009261212A (en) * | 2008-03-17 | 2009-11-05 | Toshiba Corp | Inverter apparatus and inverter system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR9100477A (en) * | 1991-01-30 | 1992-09-22 | Brasil Compressores Sa | STARTING DEVICE FOR A SINGLE PHASE INDUCTION MOTOR |
| JP5259303B2 (en) * | 2008-08-26 | 2013-08-07 | 株式会社東芝 | Inverter device |
| WO2014115498A1 (en) * | 2013-01-25 | 2014-07-31 | パナソニック株式会社 | Power conversion device, power conversion method, motor system |
-
2015
- 2015-11-27 JP JP2015231679A patent/JP6530306B2/en active Active
-
2016
- 2016-07-18 MY MYPI2016702598A patent/MY178174A/en unknown
- 2016-07-27 CN CN201610596077.9A patent/CN106817065B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112588A (en) * | 2000-10-02 | 2002-04-12 | Matsushita Refrig Co Ltd | Freezing system controller |
| CN1450716A (en) * | 2002-03-14 | 2003-10-22 | 三垦电气株式会社 | Converter and control method |
| JP2005184885A (en) * | 2003-12-16 | 2005-07-07 | Matsushita Electric Ind Co Ltd | Drive controller of motor |
| JP2009261212A (en) * | 2008-03-17 | 2009-11-05 | Toshiba Corp | Inverter apparatus and inverter system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106817065A (en) | 2017-06-09 |
| JP6530306B2 (en) | 2019-06-12 |
| JP2017099212A (en) | 2017-06-01 |
| MY178174A (en) | 2020-10-06 |
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