CN1306693C - Drive device for motor and air conditioner using same - Google Patents
Drive device for motor and air conditioner using same Download PDFInfo
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- CN1306693C CN1306693C CNB2005100080172A CN200510008017A CN1306693C CN 1306693 C CN1306693 C CN 1306693C CN B2005100080172 A CNB2005100080172 A CN B2005100080172A CN 200510008017 A CN200510008017 A CN 200510008017A CN 1306693 C CN1306693 C CN 1306693C
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
Abstract
To accurately detect phase current using a simple system constitution, to achieve high-quality driving from a low-speed rotation zone to a high-speed rotation zone, and to enable a motor to be driven at high efficiency. This motor drive unit comprises an induction voltage estimating means 17 that estimates the induction voltage of the motor from the input voltage, the output voltage, and the output current of an inverter; a rotator position and speed estimation means 18 that estimates the magnetic pole position and a rotational speed of the motor, on the basis of the estimated induction voltage; a PWM signal generation means 9 that generates a PWM signal for controlling the inverter, on the basis of the information of the estimated rotator magnetic pole position; a duty correction means 19 that corrects the duty of the generated PWM signal; and a boosting and step-down means 21 that calculates the voltage saturation rate, that is the degree of voltage saturation from the input voltage and a voltage command value applied to the motor, and varies the input voltage of the inverter according to the voltage saturation rate.
Description
Technical field
The present invention relates to a kind of motor driver that is used for compressor, this device can be with employed motor in the compressors such as the brshless DC motor of rotating speed driving arbitrarily; Also relate to the air conditioner that uses this device in addition.
Background technology
In recent years, in the motor driver of the motor of the compressor that is used for driving air conditioner etc.,, reduce the power that is consumed and seem extremely important from the viewpoint of the environment of preserving our planet.Wherein, can be widely used as a kind of power-saving technology with the technology such as frequency converter of the such high efficiency compressor electric motor of frequency drives brshless DC motor arbitrarily.In addition, in various Driving technique, compare with the rectangular wave drive technology that drives by the wavy electric current of rectangle, the sine wave drive technology is extremely gazed at because its efficient is higher, noise is also low.
Under the situation that the motor in the compressor in the air conditioner is driven, install the comparison difficulty owing to detect the transducer of the copper plate position of compressor electric motor, while therefore have the people to propose by the position of coming to infer rotor someway, the position-sensor-free sine wave drive technology that drives.The presuming method of relevant rotor-position, now known have a method (opening 2003-189670 number with reference to TOHKEMY 2000-350489 number and spy) of carrying out rotor position presuming by the induced voltage of inferring compressor electric motor.
The system configuration that is used to carry out this position-sensor-free sine wave drive has been shown among Fig. 9.Wherein, 1 is DC power supply, and 2 is frequency converter, and 3 is brushless electric machine, and 4 is stator, and 5 is rotor, and 6 is control section, and 7v and 7w are current sensor.Be provided with stator 4 and rotor 5 in the brushless electric machine 3, being equipped with 3 on the stator 4 is that winding 4u, 4v and the 4w that the Y type connects carried out at the center with the neutral point, on the rotor 5 magnet is installed.U phase terminal 8u links to each other with the front of motor of U phase winding 4u, and V phase terminal 8v links to each other with the front of motor of V phase winding 4v, and W phase terminal 8w is connected with the front of motor of W phase winding 4w.
In addition, the interlinkage of the interlinkage of the interlinkage of switch element 12u, the 13u in the frequency converter 2, switch element 12v, 13v and switch element 12w, 13w is connected with 8w with terminal 8u, the 8v of brushless electric machine 3 respectively.
In addition, cause the estimation error of rotor-position to increase in order to prevent to be applied to the sine voltage generation distortion in the brushless electric machine 3, determine each voltage of going up mutually that be added to brushless electric machine 3 by pulse-width signal generating apparatus 9, the peak value that calculates these voltages again exceeds and is applied by frequency converter that voltage check device is 16 detected, the degree of the direct voltage of DC power supply 1 output is the voltage saturation rate, and the voltage saturation rate set point with this voltage saturation rate and predefined regulation compares again.Only be in voltage saturation rate set point when above, take to reduce the safeguard measures of sending into from the outside such as rotary speed desired value, become less than voltage saturation rate set point until the voltage saturation rate by voltage saturation control device 20 in the voltage saturation rate.By such circuit structure brushless electric machine 3 is carried out drive controlling.
Infer in the position-sensor-free sine wave drive mode that induced voltage carries out in above-mentioned passing through, in order to enlarge the high speed rotating zone, need increase DC power supply voltage in advance, thereby performed protections such as the reduction rotary speed desired value control of voltage saturation control device is not operated; But in low speed rotation zone that protection control is not operated etc., DC power supply voltage can produce problems such as the increase of motor iron loss, decrease in efficiency when increasing.
Summary of the invention
The present invention is intended to solve the aforementioned problems in the prior, its purpose is to provide a kind of can realize excellent driving (no step-out, stall from the low speed rotation zone to the high speed rotating zone, drive stable, low noise, low vibration) and motor can realize the motor driver of high efficiency manipulation.
In order to solve above-mentioned existing problem, motor driver of the present invention detects by frequency converter bus current each phase current to 3 phase motors, all realizes the driving of excellence to the high speed rotary area in the low speed rotation zone by the duty ratio compensating device is set.In addition, the voltage raising and reducing device is the voltage saturation degree of voltage instruction value that voltage saturation rate and voltage saturation rate set point compare, and then improves the voltage of described variable DC power supply when the voltage saturation rate is on booster voltage saturation factor set point; Step-down voltage saturation factor set point is set at than on the little value of described booster voltage saturation factor set point, when described voltage saturation rate is under described step-down voltage saturation factor set point, then reduces the voltage of described variable DC power supply.Like this, under the little occasion of voltage saturation rate, can reduce the voltage of DC power supply, thereby improve the operating efficiency of motor.
The technique effect that the present invention produces is as follows.Motor driver of the present invention is owing to possess the voltage raising and reducing device, is the voltage saturation degree of voltage instruction value that voltage saturation rate and voltage saturation rate set point compare, and then improves the voltage of described variable DC power supply when the voltage saturation rate is on booster voltage saturation factor set point; Step-down voltage saturation factor set point is set at than on the little value of described booster voltage saturation factor set point, when described voltage saturation rate is under described step-down voltage saturation factor set point, then reduces the voltage of described variable DC power supply.Like this, under the little occasion of voltage saturation rate, can reduce the voltage of DC power supply, thereby improve the operating efficiency of motor.
Below embodiment of the present invention are summarized as follows.The duty ratio compensating device that the 1st scheme of the present invention is carried out revisal by the duty ratio of the pulse-width signal that is provided with the current sensing means that is used to detect the frequency converter bus current and the pulse-width signal generating apparatus is generated also can detect each phase current of frequency converter bus current that is three phase electric machine reliably in very narrow duty ratio.Simultaneously, motor driver of the present invention also possesses the voltage raising and reducing device, is the voltage saturation degree of voltage instruction value that voltage saturation rate and voltage saturation rate set point compare, and then improves the voltage of described variable DC power supply when the voltage saturation rate is on booster voltage saturation factor set point; Step-down voltage saturation factor set point is set at than on the little value of described booster voltage saturation factor set point, when described voltage saturation rate is under described step-down voltage saturation factor set point, then reduces the voltage of described variable DC power supply.Like this, under the little occasion of voltage saturation rate, can reduce the voltage of DC power supply, thereby improve the operating efficiency of motor.
The 2nd scheme is specially, and booster voltage saturation factor set point in the 1st scheme and step-down voltage saturation factor set point switch according to the rotary speed of motor.Like this, the efficiency operation scope of motor can obtain enlarging.
The 3rd scheme is specially, and booster voltage saturation factor set point in the 1st scheme and step-down voltage saturation factor set point switch according to the frequency converter bus current.Like this, the efficiency operation scope of motor can obtain enlarging.
The 3rd scheme is specially, and booster voltage saturation factor set point in the 1st scheme and step-down voltage saturation factor set point switch according to the rotary speed desired value of motor.Like this, the efficiency operation scope of motor can obtain enlarging.
The 5th scheme is specially the air conditioner that has used the motor driver of any scheme in the 1st～4 scheme, thereby can fully go out speciality separately, realizes very high operating efficiency in the very wide range of speeds.
Description of drawings
Fig. 1 is the structured flowchart of an embodiment of compressor electric motor drive unit of the present invention,
Fig. 2 is the illustration intention that the phase current state of compressor electric motor changes in time,
The example that Fig. 3 changes for pulse-width signal,
The schematic diagram of the current status when Fig. 4 is the variation of representing among pulse-width signal generation Fig. 3 in compressor electric motor, the frequency converter,
Another example that Fig. 5 changes for pulse-width signal,
The schematic diagram of the current status when Fig. 6 is the variation of representing among pulse-width signal generation Fig. 5 in compressor electric motor, the frequency converter,
Another example that Fig. 7 changes for pulse-width signal,
Fig. 8 is an exemplary plot of the relation between the voltage of representing electric efficiency and being applied,
Fig. 9 is the block diagram of existing apparatus.
In the above-mentioned accompanying drawing, 2 is frequency converter, 3 are brushless electric machine (the 3 phase motors that are used for compressor), 9 is the pulse-width signal generating apparatus, and 11 is current sensor (current sensing means), and 16 apply voltage check device for frequency converter, 17 is the induced voltage estimating device, 18 is rotor-position speed estimating device, and 19 is the duty ratio compensating device, and 21 is the voltage raising and reducing device.
Embodiment
A description will be given of an embodiment in accordance with the present invention with reference to the accompanying drawings.
(embodiment 1)
Fig. 1 is the structured flowchart of the motor driver in the embodiments of the invention 1.Wherein, the direct voltage of supplying with from variable DC power supply 1 is transformed into the alternating voltage with desirable frequency and voltage by frequency converter 2 earlier, supplies to then in the brushless electric machine 3.Described frequency converter 2 carries out switch control by control section 6.
Be provided with stator 4 and rotor 5 in the brushless electric machine 3, being installed with on the stator 4 with the neutral point is that 3 phase winding 4u, 4v and the 4w that Y shape connects carried out at the center, on the rotor 5 magnet is housed.U phase terminal 8u is connected with the front of motor of U phase winding 4u, and V phase terminal 8v links to each other with the front of motor of V phase winding 4v, and W phase terminal 8w is connected with the front of motor of W phase winding 4w.
In frequency converter 2, the interlinkage of the interlinkage of switch element 12u, 13u, switch element 12v, 13v and the interlinkage of switch element 12w, 13w are connected with terminal 8u, 8v, the 8w of brushless electric machine 3 respectively.
The direct voltage that is applied on the frequency converter 2 is transformed into 3 cross streams voltages by the circuit that the switch element in the above-mentioned frequency converter 2 etc. constitutes, and by 3 such cross streams voltages brushless electric machine 3 is driven again.
For the output voltage that the target velocity that realizes providing from the outside, output go out from the Error Calculation with present speed, pulse-width signal generating apparatus 9 generates the pulse-width signal of the switch element that is used for driving frequency converter 2.After pulse-width signal carries out revisal by duty ratio compensating device 19, be used for drive signal that switch element is driven, each switch element 12u, 12v, 12w, 13u, 13v, 13w are operated by base drive circuit 10 conversion.
Operational circumstances in the control section 6 below makes a brief explanation.The direct voltage that output voltage that calculates the phase current of the current sensing means 11 detected brushless electric machines 3 of induced voltage estimating device 17 on being arranged on the frequency converter bus, the pulse-width signal generating apparatus 9 and frequency converter apply detected DC power supply 1 output of voltage check device 16 is inferred out the induced voltage of brushless electric machine 3.Then, rotor-position speed estimating device 18 is inferred out the rotor magnetic pole position and the speed of brushless electric machine 3 according to the induced voltage of inferring.According to the rotor magnetic pole position information of inferring out, pulse-width signal generating apparatus 9 is determined should be added to the voltage that each is gone up mutually in the process that drives brushless electric machine 3, generates pulse-width signal according to determined voltage again.Like this, according to the speed of the rotor 5 of inferring out and and the target velocity sent into from the outside between information such as deviation, spinner velocity just can be controlled so as to target velocity.
Next, the operation to induced voltage estimating device 17 is elaborated.At first, can detect the phase current (iu, iv, iw) that in each phase winding, flows by current sensing means 11.In addition, output voltage that calculates from pulse-width signal generating apparatus 9 and frequency converter apply voltage check device 16 detected frequency converters and apply information of voltage, can obtain the phase voltage (vu, vv, vw) that is applied on each phase winding.In principle, can obtain inductive voltage value eu, ev, the ew that each phase winding, induces from these magnitudes of voltage by following formula (1), (2), (3).Here, R is a resistance, and L is an inductance.In addition, d (iu)/dt, d (iv)/dt, d (iw)/dt is respectively the time diffusion of iu, iv, iw.
eu＝vu-R·iu-L·d(iu)/dt ...(1)
ev＝vv-R·iv-L·d(iv)/dt ...(2)
ew＝vw-R·iw-L·d(iw)/dt ...(3)
Formula (1), (2), (3) are further launched in detail, will become following formula (4), (5), (6).
eu＝vu-R·iu-((la+La)·d(iu)/dt
-Las·cos(2θm)·d(iu)/dt
-Las·iu·d{cos(2θm)}/dt
+0.5·La·d(iv)/dt
-Las·cos(2θm-120°)·d(iv)/dt
-Las·iv·d{cos(2θm-120°)}/dt
+0.5·La·d(iw)/dt
-Las·cos(2θm+120°)·d(iw)/dt
-Las·iw·d{cos(2θm+120°)}/dt ...(4)
ev＝vv-R·iv-(la+La)·d(iv)/dt
-Las·cos(2θm+120°)·d(iv)/dt
-Las·iv·d{cos(2θm+120°)}/dt
+0.5·La·d(iw)/dt
-Las·cos(2θm)·d(iw)/dt
-Las·iw·d{cos(2θm)}/dt
+0.5·La·d(iu)/dt
-Las·cos(2θm-120°)·d(iu)/dt
-Las·iu·d{cos(2θm-120°)}/dt ...(5)
ew＝vw-R·iw-(la+La)·d(iw)/dt
-Las·eos(2θm-120°)·d(iw)/dt
-Las·iw·d{cos(2θm-120°)}/dt
+0.5·La·d(iu)/dt
-Las·cos(2θm+120°)·d(iu)/dt
-Las·iu·d{{cos(2θm+120°)}/dt
+0.5·La·d(iv)/dt
-Las·cos(2θm)·d(iv)/dt
-Las·iv·d{cos(2θm)}/dt ...(6)
Here, d/dt express time differential, the differentiate middle d θ/dt that occur relevant with trigonometric function is used for being transformed into phase angle speed with inferring speed omega m.In addition, d (iu)/dt, d (iv)/dt, d (iw)/dt is similar to by 1 Euler and obtains.In addition, w phase current values iw shown in following formula (14) like that, be the inverse value of u phase current values iu and v phase current values iv sum.The R here is the resistance of each phase winding, and la is the leakage inductance of each phase winding, and La is the mean value of the effective inductance of each phase winding, and Las is the amplitude of the effective inductance of each phase winding.
What use in the induced voltage estimating device 17 is following formula (7), (8), (9) after formula (4), (5), (6) are simplified.Above-mentioned simplification is meant, supposes that phase current values iu, iv, iw for sinusoidal wave, form phase current iu, iv, iw from current-order amplitude ia and current-order phase beta t, thereby calculating is oversimplified.
eu＝vu+R·ia·sin(θm+βT)
+1.5·(la+La)·cos(θm+βT)
-1.5·Las·cos(θm-βT) ...(7)
ev＝vv+R·ia·sin(θm+βT-120°)
+1.5·(la+La)·cos(θm+βT-120°)
-1.5·Las·cos(θm-βT-120°) ...(8)
ew＝vw+R·ia·sin(θm+βT-240°)
+1.5·(la+La)·cos(θm+βT-240°)
-1.5·Las·cos(θm-βT-240°) ...(9)
Next, the operational circumstances to rotor-position speed estimating device 18 describes.Rotor-position speed estimating device 18 is used for from what induced voltage estimating device 17 was inferred inferring position and the speed that inductive voltage value eu, ev and ew infer out rotor 5.Here, the angle θ m that infers that rotor-position speed estimating device 18 identifies is carried out revisal, converge to its actual value gradually, and speed omega m is inferred in formation thus by the error of using induced voltage.
At first, obtain the induced voltage fiducial value (eum, evm and ewm) of each phase by following formula.
eum＝em·sin(θm+βT)
evm＝em·sin(θm+βT-120°)
ewm＝em·sin(θm+βT-240°) ...(10)
The em here is the induced voltage amplitude, obtains with the amplitude of inferring induced voltage eu, ev, ew is consistent by making it.
Then, obtain the induced voltage fiducial value obtained above and the deviation ε between the induced voltage presumed value.As getting as shown in the following formula (11), deviation ε is for to deduct induced voltage fiducial value esm from induced voltage presumed value es.
ε＝es-esm ...(11)
(the s here represents phase, and s can be u/v/w)
If this deviation is 0, then inferring angle θ m will become its actual value, therefore, be 0 in order to make deviation ε, carry out the direct ratio integral operation to inferring angle θ m, then compensating value be delivered to pulse-width signal generating apparatus 9.In addition, by in rotor-position speed estimating device 18, calculating the changing value of inferring angle θ m, form and infer speed omega m; In order to realize target velocity ω
*, by target velocity ω
*And infer poor Δ ω between the speed omega m, will
KPΔω+K1Δω ...(12)
(KP: proportional gain, KI: compensating value storage gain) is delivered in the pulse-width signal generating apparatus 9.
In pulse-width signal generating apparatus 9, calculate the voltage V that export according to described compensating value
*, from magnitude of voltage V
*Obtain by following mode and to output to each voltage Vs in mutually
*(s is phase, i.e. u/v/w).····
Vu
*＝V
*·sin(θm+βT)
Vv
*＝V
*·sin(θm+βT-120°)
Vw
*＝V
*·sin(θm+βT-240°) ...(13)
Then, in order to export the voltage Vs that obtains above
*(s is a phase, be u/v/w), after the pulse-width signal of each switch element 12u, 12v, 12w, 13u, 13v, 13w carries out revisal by duty ratio compensating device 19, output to again in the base drive circuit 10, drive each switch element 12u, 12v, 12w, 13u, 13v, 13w, generate sinuous interchange.
As mentioned above, use the deviation ε that infers between inductive voltage value and the induced voltage fiducial value to form in the present embodiment and infer angle θ m, make brushless electric machine 3 realize sine wave drive by flowing through sinuous phase current.
Next, before 19 kinds of operations of carrying out of duty ratio compensating device were described, the appearance situation of phase current in the frequency converter bus current by Fig. 2～6 pair brushless electric machine 3 described earlier.Fig. 2 shows the state of the phase current that flows in each phase winding of the brushless electric machine 3 when the phase angle switches.
In 0～60 ° the interval, the electric current among U phase winding 4u and the W phase winding 4w is to flow to neutral point from front of motor at the phase angle, and the electric current among the V phase winding 4v is to flow to front of motor from neutral point.In 60～120 ° the interval, the electric current among the U phase winding 4u is to flow to neutral point from front of motor at the phase angle, and the electric current among V phase winding 4v and the W phase winding 4w is to flow to front of motor from neutral point.After this, when 60 ° of phase angle variations, the state of the phase current that flows through in each phase winding all will take place once to change.
In Fig. 2, when the phase angle for for example 30 ° the time, (U is the signal that makes switch element 12u work under the situation that the pulse-width signal that pulse-width signal generating apparatus 9 generates changes as shown in Figure 3, V is the signal that makes switch element 12v work, W is the signal that makes switch element 12w work, X is the signal that makes switch element 13u work, Y is the signal that makes switch element 13v work, Z is the signal that makes switch element 13w work, the state of its driving switch element conducting is represented with high potential), as shown in Figure 4, electric current in the frequency converter bus is 0 at time point 1, on time point 2, will the electric current of W phase winding 4w occur flowing through, the electric current that flows through among the V phase winding 4v on time point 3, will occur.
In addition, under the situation that the pulse-width signal that pulse-width signal generating apparatus 9 generated when the phase angle in Fig. 2 was 30 ° changes as shown in Figure 5, electric current in the frequency converter bus as shown in Figure 6 like that, at time point 1 is 0, at the electric current of time point 2, be the electric current that flows through among the V phase winding 4v at time point 3 for flowing through among the U phase winding 4u.
Like this, the state of switch element 12u, the 12v by frequency converter 2,12w, 13u, 13v, 13w can be recognized the appearance situation of phase current on the frequency converter bus in the brushless electric machine 3.If judge two electric currents in mutually at more approaching time point above can resembling, by
Iu+iv+iw=0 ... relation (14) just can obtain 3 mutually in separately electric current, this is conspicuous.
But, under what kind of situation about changing that the pulse-width signal that pulse-width signal generating apparatus 9 generates when the phase angle among Fig. 2 is 30 ° goes out as shown in Figure 7, electric current on the frequency converter bus is 0 on time point 1, has only the electric current among the V phase winding 4v on time point 3.Such pulse-width signal constantly repeats, just can not ask 3 mutually in separately electric current, just can not infer induced voltage in the induced voltage estimating device 17, just can not carry out the driving of brushless electric machine 3.
For fear of above-mentioned problem, during the necessity of the phase current that in having produced each phase winding that needs detection brushless electric machine 3 in the duty ratio compensating device 19, has flowed, then the pulse-width signal that produces in the pulse-width signal generating apparatus 9 is checked; Just in case the situation that the signal shown in Fig. 7 changes occurs, then in revisal after the pulse-width signal shown in Fig. 3 for example, be re-supplied in the drive circuit 10.
Like this, be imported into the current sensing means 11 from the duty cycle information of the pulse-width signal of duty ratio compensating device 19 output, one side is judged by the electric current of which phase that 11 pairs of frequency converter bus currents of current sensing means are brushless electric machine 3, be transformed into 3 phases electric current separately on one side, the induced voltage that is undertaken by induced voltage estimating device 17 is inferred in the calculating and is used effectively afterwards.
In addition, in order to prevent the situation appearance that sinusoidal wave distortion causes the estimation error increase of rotor-position to take place because of the voltage that is applied in the brushless electric machine 3, the voltage of each that should be added to brushless electric machine 3 by pulse-width signal generating apparatus 9 decision in mutually, the peak value that calculates these voltages again is detected above applying voltage check device 16 by frequency converter, the degree of the direct voltage of variable DC power supply 1 output is the voltage saturation rate, voltage saturation rate and the booster voltage saturation factor set point and the step-down voltage saturation factor set point that are set in the voltage raising and reducing device 21 is compared again.Under the voltage saturation rate is situation more than the booster voltage saturation factor set point, operate by for example making boost chopper, improve the voltage of described variable DC power supply 1; Step-down voltage saturation factor set point is set in than on the little value of described booster voltage saturation factor set point, when described voltage saturation rate is under described step-down voltage saturation factor set point, by for example making buck circuit that operation takes place or making the boost chopper shut-down operation wait the voltage that reduces described variable DC power supply 1.
Like this, when the voltage saturation rate can not boosted under the situation under the booster voltage saturation factor set point, situation under step-down voltage saturation factor set point then can step-down, and therefore under the little situation of voltage saturation rate, it is very low that the voltage of variable DC power supply 1 will be held.Therefore, as shown in Figure 8, the brushless electric machine 3 that is carried out pulse width modulation controlled has the characteristic that iron loss reduces, electric efficiency uprises when the voltage of variable DC power supply 1 reduces, so the operating efficiency of motor can be improved.
(embodiment 2)
In the present embodiment, storage has booster voltage saturation factor set point and step-down voltage saturation factor set point in the voltage raising and reducing device 21 in Fig. 1, and they switch by the rotary speed of the brushless electric machine 3 that rotor-position speed estimating device 18 is inferred.This switching of carrying out according to rotary speed specifically is, under the rotary speed of the brushless electric machine 3 that rotor-position speed estimating device 18 is inferred out the situation bigger than preset value, the load that then is judged as brushless electric machine 3 is lighter, even step-out does not easily take place greatly the estimation error of rotor-position at all, therefore booster voltage saturation factor set point and step-down voltage saturation factor set point are strengthened.Because variable DC power supply 1 is not prone to and boosts, so the efficiency operation scope of motor can enlarge.
(embodiment 3)
When the phase current (iu, iv, iw) that flows in 11 detected each phase winding of the current sensing means among Fig. 1 is very little, can conclude that the load of brushless electric machine 3 is very light, even the estimation error of rotor-position more step-out can not occur more yet.Therefore, in the present embodiment, come booster voltage saturation factor set point and step-down voltage saturation factor set point are switched according to the phase current (iu, iv, iw) that flows in current sensing means 11 detected each phase winding.Like this, also can obtain same effect.
(embodiment 4)
In Fig. 1, when target velocity is very big, can judge that the load of brushless electric machine 3 is very light, even the estimation error of rotor-position more step-out can not take place more yet.Therefore, in the present embodiment, booster voltage saturation factor set point and step-down voltage saturation factor set point are switched by target velocity.Like this, also can obtain same effect.
In sum, the present invention by detecting the frequency converter bus current current sensing means 11 and duty ratio compensating device 19 can detect brushless electric machine 3 each phase winding in the phase current that flows, and can switch the voltage saturation rate set point of each voltage in mutually of being added to brushless electric machine 3, therefore can enlarge the efficiency operation scope of motor.
Be provided with the voltage raising and reducing device in the motor driver of the present invention, this voltage raising and reducing device is that the voltage saturation rate compares with the voltage saturation rate set point that can switch with the voltage saturation degree of voltage instruction value, when the voltage saturation rate under the situation more than the booster voltage saturation factor set point, then strengthen the voltage of described variable DC power supply; Step-down voltage saturation factor set point is set than on the little value of described booster voltage saturation factor set point, when described voltage saturation rate is under step-down voltage saturation factor set point, then reduces the voltage of described variable DC power supply.Like this, under the less situation of voltage saturation rate, the voltage of DC power supply is reduced, thereby make motor realize high efficiency operation.
Motor driver among the present invention can use in the compressor of air conditioner, after voltage saturation rate and voltage saturation rate set point are compared described variable DC power supply is boosted or step-down, can make motor realize high efficiency operation.The present invention can be used for rotating speed arbitrarily compressor electric motors such as brshless DC motor being carried out in compressor driven motor driver etc.
Claims (5)
1. motor driver is characterized in that comprising:
Drive the frequency converter of 3 phase motors;
Detect the current sensing means of frequency converter bus current;
Detect the dc voltage detecting device of the voltage of the variable DC power supply that is connected with described frequency converter;
Output voltage values by described frequency converter and infer out the induced voltage estimating device of the induced voltage of described motor by the detected current value of described current sensing means;
Infer out the rotor magnetic pole position of described motor and the rotor-position speed estimating device of rotary speed according to the induced voltage presumed value of inferring;
Be formed for controlling the pulse-width signal generating apparatus of the pulse-width signal of described frequency converter according to the rotor magnetic pole position information of inferring;
The duty ratio compensating device that the duty ratio of the pulse-width signal that forms in the described pulse-width signal generating apparatus is carried out revisal; And
The voltage raising and reducing device, described voltage raising and reducing device is from the output of described dc voltage detecting device and be applied to voltage instruction value on the described motor to calculate the voltage saturation degree be the voltage saturation rate, compare with predefined booster voltage saturation factor set point, be in the voltage that booster voltage saturation factor set point improves described variable DC power supply when above in the voltage saturation rate; Step-down voltage saturation factor set point is set in than on the little value of described booster voltage saturation factor set point, in the time of under described voltage saturation rate is in described step-down voltage saturation factor set point, then reduces the voltage of described variable DC power supply.
2. motor driver as claimed in claim 1 is characterized in that: described booster voltage saturation factor set point and step-down voltage saturation factor set point switch according to the rotary speed of motor.
3. motor driver as claimed in claim 1 is characterized in that: described booster voltage saturation factor set point and step-down voltage saturation factor set point switch according to the frequency converter bus current.
4. motor driver as claimed in claim 1 is characterized in that: described booster voltage saturation factor set point and step-down voltage saturation factor set point switch according to the rotary speed desired value of motor.
5. an air conditioner is characterized in that: wherein used as each the described motor driver in the claim 1～4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004036357 | 2004-02-13 | ||
| JP2004036357A JP3985792B2 (en) | 2004-02-13 | 2004-02-13 | Electric motor drive device and air conditioner using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1655439A CN1655439A (en) | 2005-08-17 |
| CN1306693C true CN1306693C (en) | 2007-03-21 |
Family
ID=34908360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100080172A Expired - Fee Related CN1306693C (en) | 2004-02-13 | 2005-02-07 | Drive device for motor and air conditioner using same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3985792B2 (en) |
| CN (1) | CN1306693C (en) |
| ES (1) | ES2264631B2 (en) |
| IT (1) | ITMI20050204A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10830481B2 (en) | 2018-10-24 | 2020-11-10 | Haie US Appliance Solutions, Inc. | Detecting blockage of air conditioner unit based on fan speed |
| US11193684B2 (en) | 2018-10-24 | 2021-12-07 | Haier Us Appliance Solutions, Inc. | Detecting blockage of air conditioner unit based on control signal |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4682869B2 (en) * | 2006-02-23 | 2011-05-11 | パナソニック株式会社 | Refrigeration cycle equipment |
| CN104393801B (en) * | 2014-11-24 | 2017-07-14 | 苏州科爱佳自动化科技有限公司 | A kind of brshless DC motor arrangements for speed regulation and speed regulating method |
| CN106329901B (en) * | 2016-11-21 | 2018-10-16 | 广东美的制冷设备有限公司 | Overcurrent protection peripheral circuit and electrical equipment |
| CN108613324A (en) * | 2017-01-25 | 2018-10-02 | 珠海格力电器股份有限公司 | Motor load mated condition detecting system, method and air conditioner |
| CN108194338B (en) * | 2018-01-15 | 2022-03-25 | 杭州先途电子有限公司 | Compressor driving voltage saturation control method and device |
| CN109489207B (en) * | 2018-11-19 | 2019-10-11 | 奥克斯空调股份有限公司 | A kind of electric motor starting control method, device and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250244A (en) * | 1998-10-01 | 2000-04-12 | 三星电子株式会社 | Driver for switching reluctance motor |
| JP2000350489A (en) * | 1999-01-27 | 2000-12-15 | Matsushita Electric Ind Co Ltd | Position sensorless motor controller |
| CN1332516A (en) * | 2000-07-07 | 2002-01-23 | 精工爱普生株式会社 | Driving device for electric machine |
| CN1334642A (en) * | 2000-07-19 | 2002-02-06 | 精工爱普生株式会社 | Device for driving electric machine without sensor |
| CN2507186Y (en) * | 2001-08-27 | 2002-08-21 | 珠海市祥宝电机厂有限公司 | Driving device for single phase brushless dc motor |
| CN1426163A (en) * | 2001-12-14 | 2003-06-25 | 松下电器产业株式会社 | Electric motor driving device and freezing device using said motor driving device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0667257B2 (en) * | 1984-04-16 | 1994-08-24 | ファナック株式会社 | Synchronous motor control method |
| US5936378A (en) * | 1997-03-27 | 1999-08-10 | Matsushita Electric Industrial Co., Ltd. | Motor controller |
| JP3353781B2 (en) * | 2000-09-28 | 2002-12-03 | 松下電器産業株式会社 | Motor control device |
| JP2002291284A (en) * | 2001-03-26 | 2002-10-04 | Toshiba Kyaria Kk | Method for detecting current of motor and its controller |
| JP3980005B2 (en) * | 2003-03-28 | 2007-09-19 | 松下電器産業株式会社 | Inverter control device for motor drive and air conditioner |
| JP2005033957A (en) * | 2003-07-10 | 2005-02-03 | Matsushita Electric Ind Co Ltd | Motor driver for compressor of air conditioner |
-
2004
- 2004-02-13 JP JP2004036357A patent/JP3985792B2/en not_active Expired - Lifetime
-
2005
- 2005-02-07 CN CNB2005100080172A patent/CN1306693C/en not_active Expired - Fee Related
- 2005-02-11 IT IT000204A patent/ITMI20050204A1/en unknown
- 2005-02-14 ES ES200500361A patent/ES2264631B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250244A (en) * | 1998-10-01 | 2000-04-12 | 三星电子株式会社 | Driver for switching reluctance motor |
| JP2000350489A (en) * | 1999-01-27 | 2000-12-15 | Matsushita Electric Ind Co Ltd | Position sensorless motor controller |
| CN1332516A (en) * | 2000-07-07 | 2002-01-23 | 精工爱普生株式会社 | Driving device for electric machine |
| CN1334642A (en) * | 2000-07-19 | 2002-02-06 | 精工爱普生株式会社 | Device for driving electric machine without sensor |
| CN2507186Y (en) * | 2001-08-27 | 2002-08-21 | 珠海市祥宝电机厂有限公司 | Driving device for single phase brushless dc motor |
| CN1426163A (en) * | 2001-12-14 | 2003-06-25 | 松下电器产业株式会社 | Electric motor driving device and freezing device using said motor driving device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10830481B2 (en) | 2018-10-24 | 2020-11-10 | Haie US Appliance Solutions, Inc. | Detecting blockage of air conditioner unit based on fan speed |
| US11193684B2 (en) | 2018-10-24 | 2021-12-07 | Haier Us Appliance Solutions, Inc. | Detecting blockage of air conditioner unit based on control signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005229736A (en) | 2005-08-25 |
| CN1655439A (en) | 2005-08-17 |
| ES2264631A1 (en) | 2007-01-01 |
| JP3985792B2 (en) | 2007-10-03 |
| ES2264631B2 (en) | 2008-01-01 |
| ITMI20050204A1 (en) | 2005-08-14 |
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