CN103460596B - Motor drive and the electric equipment using it - Google Patents
Motor drive and the electric equipment using it Download PDFInfo
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- CN103460596B CN103460596B CN201280016932.4A CN201280016932A CN103460596B CN 103460596 B CN103460596 B CN 103460596B CN 201280016932 A CN201280016932 A CN 201280016932A CN 103460596 B CN103460596 B CN 103460596B
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- arm
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- brushless
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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
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
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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
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
-
- 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
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
-
- 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
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention provides a kind of and has the smoothing capacity device of small capacitances independently, it is possible to busbar voltage does not carries out the cheap and small-sized motor drive (22) of more stable smooth driving with not steeply rising.Motor drive (22) including: rectifier smoothing circuit (2)；The direct current power obtained by rectifier smoothing circuit (2) is converted to alternating electromotive force and is supplied to the inverter (3) of brushless DC motor (4)；With the control portion (30) that signal will be driven to export inverter (3), described driving signal controls inverter (3), the switch element making an arm in multiple arms carries out the period of PWM output, the switch element of an arm in multiple arms of opposition side upper and lower with this arm carries out conducting output, control portion (30) output drive signal, make, when switching the energized phase of brushless DC motor (4), to begin to turn on output with the switch element of the arm of the arm opposition side turning on end of output.
Description
Technical field
The present invention relates to drive brushless DC(direct current) motor drive of motor and use its electric equipment.
Background technology
First existing motor drive, according to actuating speed, carries out velocity feedback driving, carries out square wave and drives
Dynamic.Fig. 7 is by the block diagram of the first existing motor drive that square wave drives.Fig. 8 is to represent the first existing electricity
The figure of the waveform driving signal of motivation driving means.
In Fig. 7, from the alternating electromotive force of alternating current power supply 201, by by four commutation diode 202a～202d and smooth
The rectification partes glabra 202 that capacitor 202e is constituted becomes direct current power, and this direct current power is input to inverter 203.Inverter
203 is six by being made up of six switch element 203a～203f and six back flow current diode 203g～203l
Arm carries out three phase bridge and constitutes.The direct current power of input is converted to the alternating electromotive force of assigned frequency by inverter 203, output
To brushless DC motor 204.
The voltage of position detection part 205 lead-out terminal based on inverter 203, obtains by the rotation of brushless DC motor 204
Then the information of the induced voltage produced.Based on this information, position detection part 205 detects the rotor of brushless DC motor 204
The relative position of 204a.Speed estimating portion 206 calculates brushless DC motor 204 based on the signal from position detection part 205
Rotary speed.Waveform generating unit 207 is according to the speed calculation PWM(Pulse Width calculated by speed estimating portion 206
Modulation: pulsewidth modulation) dutycycle connect width, based on the signal deciding inverter 203 from position detection part 205
The arm of middle energising, generates the waveshape signal representing its result.Drive division 208 is based on the waveshape signal from waveform generating unit 207
Carry out the driving of switch element 203a～203f of inverter 203.Now, from the driving signal of drive division 208 output, figure is become
Switching waveform shown in 8.Fig. 8 represents the waveform driving signal of the grid being input to six switch element 203a～203f.As
Shown in Fig. 8, the switch element carrying out a upper arm in 3 upper arm is repeated the PWM that conducting based on pulsewidth modulation disconnects
Output, and the conducting output that the switch element carrying out a underarm in 3 underarms always turns on.Thus, on by constituting
Side switch element 203a, 203c of arm connect width adjustment with the PWM duty cycle of 203e and flow through the electricity of brushless DC motor 204
Stream, it is possible to the change of the rotary speed of reply brushless DC motor 204 and the change of load.
According to above-mentioned first existing structure, using the teaching of the invention it is possible to provide arbitrarily change the speed of brushless DC motor while driving
Dynamic motor drive.
It addition, as the second existing motor drive, such as, as disclosed in patent documentation 1, have first
The feature of existing motor drive, and make the existing motor drive of capacity ratio first of smoothing capacitor
Little, containing big pulsation in busbar voltage (output voltage of rectification partes glabra, i.e. the DC voltage being applied on inverter)
It is driven composition.Fig. 9 is the second existing motor-driven dress representing the smoothing capacity device using such small capacitances
The block diagram put.
In Fig. 9, the alternating electromotive force from alternating current power supply 301 is rectified commutation diode 302a～302d of partes glabra 302
Rectification, is smoothed capacitor 302e afterwards and smooths.Here, owing to the electric capacity of smoothing capacity device 302e is little, put down so carrying out self-rectifying
The voltage (busbar voltage) in cunning portion 302 is imported into inverter 303 with the state containing big ripple component.Inverter 303 is
By six arms three being made up of six switch element 303a～303f and six back flow current diode 303g～303l
Bridge mutually and constitute.The direct current power containing pulsation of input is converted to the alternating electromotive force of assigned frequency by inverter 303, defeated
Go out to brushless DC motor 304(be stator 304b strictly speaking).
The voltage of position detection part 305 lead-out terminal based on inverter 303, obtains by the rotation of brushless DC motor 304
Then the information of the induced voltage produced.Based on this information, position detection part 305 detects the rotor of brushless DC motor 304
The relative position of 304a.It addition, rectification partes glabra 302 output containing in the voltage of big pulsation, position detection when voltage is low
Portion 305 is difficult to detect above-mentioned relative position exactly, so position deduction portion 306 positional information based on position detection part 305
The relative position of presumption rotor 304a.That is, the output voltage at the rectification partes glabra 302 detected by voltage detection department 307 is
In the case of below setting, switching part 308 uses the signal from position deduction portion 306 as position detection signal, waveform
Generating unit 309 determines arm and the PWM duty cycle width of energising in inverter 303, generates the waveshape signal representing its result.Based on
The waveshape signal generated by waveform generating unit 309, drive division 310 drives switch element 303a～303f of inverter 303.
According to above-mentioned second existing structure, even if the busbar voltage from rectification partes glabra 302 output is containing big pulsation
Voltage, it is also possible to arbitrarily change the speed of brushless DC motor and drive on one side and load, i.e. smoothing capacity device can be made
The existing motor drive of capacity ratio first of 302e is little, it is possible to provide ratio the first existing motor drive
More cheap and small-sized motor drive.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2005-198376 publication
Summary of the invention
The problem that invention is to be solved
But, in above-mentioned second existing motor drive, there is the switching of the energized phase of brushless DC motor
Time busbar voltage steeply rise, the problem that the smooth driving of brushless DC motor becomes difficulty.Particularly in high-speed driving or
Under the state that the electric currents such as high capacity driving are big, worst in the case of there is circuit because overvoltage and the destroyed problem waited.To this
Concrete example Fig. 9, Figure 10 and Figure 11 of the problem of sample illustrate.Figure 10 represents driving of the second existing motor drive
Dynamic signal and the waveform of electric current, Figure 11 represents the current path of the second existing motor drive.
Here, the brushless DC motor being connected with the switch element 303c and switch element 303d of the inverter 303 of Fig. 9
The stator 304b of 304 illustrates as V phase.In Figure 10, time (1)～(5) are the energized phase of brushless DC motor 304
Identical period, during this period, switch element 303a carries out switching (that is, PWM output), and switch element 303d becomes 100% energising
(that is, conducting output) (strictly speaking, exports for conducting in time (1)～(4) switch element 303d).Time (1) at Figure 10
(3) in, becoming identical switching mode, current path is the path shown in Figure 11 (a).Time (2) and (4) at Figure 10
In, becoming identical switching mode, current path is Figure 11 (b).
In the time (5) of Figure 10, the switch element 303d being positioned at underarm is switched to disconnect from conducting, switch element 303f
It is switched to conducting from disconnection, but now, the switch element 303a of upper arm is for disconnecting, so passing through back flow current diode 303h
Electric current flow to brushless DC motor 304, on the other hand, the electric current from brushless DC motor 304 flow through back flow current use
Diode 303i, as a result of which it is, flow into smoothing capacity device 302e by the path current shown in Figure 11 (c).Now, due to smooth
Capacitor 302e is small capacitances, so the voltage at two ends of smoothing capacity device 302e, i.e. busbar voltage steeply rise.Like this,
In above-mentioned second existing motor drive, there is the busbar voltage when the switching of the energized phase of brushless DC motor anxious
Acute rising, the problem that the smooth driving of brushless DC motor becomes difficulty.
Then, the present invention solves above-mentioned existing problem and researches and develops, it is therefore intended that provides a kind of and has small capacitances
Smoothing capacity device independently, it is possible to busbar voltage does not carries out the cheap and small-sized of more stable smooth driving with not steeply rising
Motor drive.
For the method solving problem
The motor drive of one mode of the present invention, is connected with alternating current power supply, has multiple winding by switching
The energized phase of brushless DC motor make above-mentioned brushless DC motor rotate to drive, described motor drive includes: rectification
Circuit, its alternating electromotive force to inputting from above-mentioned alternating current power supply carries out rectification；Partes glabra, it includes capacitor and reactor, right
Output from above-mentioned rectification circuit smooths, and the resonant frequency of described capacitor and reactor is than the frequency of above-mentioned alternating electromotive force
40 times of rate high；Inverter, its using include switch element and back flow current diode circuit as an arm time, have many
The branch road (leg) that individual upper arm and underarm are connected in series, will utilize above-mentioned partes glabra and the direct current power that obtains is converted to hand over
Stream electric power, is supplied to above-mentioned brushless DC motor；With control portion, above-mentioned for instruction inverter is supplied power to above-mentioned brushless DC by it
The driving signal in the supply moment of motor exports above-mentioned inverter, and wherein, above-mentioned driving signal controls above-mentioned inverter, makes
The switch element obtaining an arm in the plurality of arm carries out making this switch element that conducting of based on pulsewidth modulation is repeated
The period exported with the PWM disconnected, the switch element of an arm in multiple arms of opposite side upper and lower with this arm turns on
Output is so that this switch element always turns on, and above-mentioned control portion exports above-mentioned driving signal, so that above-mentioned brushless have switched
During the energized phase of DC motor, the switch element of the arm of the arm opposition side with conducting end of output begins to turn on output.
According to described structure, though the energized phase of switching brushless DC motor, owing to flowing through the electric current of the energized phase of disconnection
The path returning brushless DC motor is constantly present, so the current path returning to small capacitances smoothing capacity device disappears, and bus electricity
Steeply rising of pressure is suppressed.
The effect of invention
The motor drive of the present invention, using the teaching of the invention it is possible to provide a kind of suppress energized phase switching time drastically the going up of busbar voltage
Rise, it is possible to realize the cheap and small-sized motor drive of more stable smooth motor-driven.
Accompanying drawing explanation
Fig. 1 is the block diagram of the motor drive of embodiments of the present invention.
Fig. 2 is the sequential chart of the waveform driving signal representing this embodiment.
Fig. 3 is the figure of the waveform driving signal and electric current representing this embodiment.
Fig. 4 is the figure of the current path representing this embodiment.
Fig. 5 (a) is the figure of the waveform of the busbar voltage representing existing motor drive, and Fig. 5 (b) is to represent this reality
Execute the figure of the waveform of the busbar voltage of mode.
Fig. 6 is the main portion sectional view of the brushless DC motor of this embodiment.
Fig. 7 is the block diagram of the first existing motor drive.
Fig. 8 is the sequential chart of the waveform driving signal representing the first existing motor drive.
Fig. 9 is the block diagram of the second existing motor drive.
Figure 10 is the figure of the waveform driving signal and electric current representing the second existing motor drive.
Figure 11 is to represent the second existing motor drive and the figure of current path.
Detailed description of the invention
The motor drive of one mode of the present invention, is connected with alternating current power supply, has multiple winding by switching
The energized phase of brushless DC motor make above-mentioned brushless DC motor rotate to drive, described motor drive includes: rectification
Circuit, its alternating electromotive force to inputting from above-mentioned alternating current power supply carries out rectification；Partes glabra, it includes capacitor and reactor, right
Output from above-mentioned rectification circuit smooths, and the resonant frequency of described capacitor and reactor is than the frequency of above-mentioned alternating electromotive force
40 times of rate high；Inverter, it is when the circuit that will include switch element and back flow current diode composition is as an arm,
There is multiple upper arm and branch road that underarm is connected in series, will utilize above-mentioned partes glabra and the direct current power that obtains is converted to hand over
Stream electric power, is supplied to above-mentioned brushless DC motor；With control portion, above-mentioned for instruction inverter is supplied power to above-mentioned brushless DC by it
The driving signal in the supply moment of motor exports above-mentioned inverter, and wherein, above-mentioned driving signal controls above-mentioned inverter, makes
The switch element obtaining an arm in the plurality of arm carries out making this switch element that conducting of based on pulsewidth modulation is repeated
The period exported with the PWM disconnected, the switch element of an arm in multiple arms of opposite side upper and lower with this arm turns on
Output is so that this switch element always turns on, and above-mentioned control portion exports above-mentioned driving signal, so that above-mentioned brushless have switched
During the energized phase of DC motor, the switch element of the arm of the arm opposition side with conducting end of output begins to turn on output.
Thus, even if the energized phase of switching brushless DC motor, in the energized phase of disconnection, the energy of accumulation returns brushless DC
The path of motor also always exists in inverter, and thus energy does not returns to the smoothing capacity device of small capacitances, busbar voltage
Steeply rise and be suppressed, using the teaching of the invention it is possible to provide stable smooth driving small-sized and honest and clean of above-mentioned brushless DC motor can be carried out
The motor drive of valency.
Here, above-mentioned control portion can also be when have switched the energized phase of above-mentioned brushless DC motor, as from above-mentioned
Before the busbar voltage of voltage of partes glabra output rises to assigned voltage, make arm opposition side with above-mentioned conducting end of output
The conducting output of the switch element of arm starts.By using such structure, it is possible to by busbar voltage suppression in busbar voltage
Rise and become the bad influence impossible voltage rising value such as the overvoltage of problem and the instability of driving, using the teaching of the invention it is possible to provide be stable
Motor drive.
It addition, the period of the switch element constant conduction output of the arm of arm opposition side with above-mentioned conducting end of output,
Can also be at least until the electric current of the arm flowing through above-mentioned conducting end of output becomes below setting.Thus, even if
Busbar voltage rises the electric current inflow capacitor that also will not become below the current value of problem, it is possible to carry out more stable driving.
It addition, the period of the switch element constant conduction output of the arm of arm opposition side with above-mentioned conducting end of output,
Can also be until the energized phase of above-mentioned brushless DC motor switches next time.Thus, the setting of powered-on mode becomes easy,
Software and system for driving can simplify, it is possible to improve maintainability and quality.
It addition, the rotor of above-mentioned brushless DC motor can also be consisted of embedment permanent magnet in the core, and have
Saliency.Thus, in the driving of brushless DC motor, together with the Magnet torque of permanent magnet, it is also possible to effectively utilize salient pole
The reluctance torque of property, so the reduction exporting torque by obtaining big advance angle when busbar voltage declines is relaxed,
It is possible to carry out more stable driving.
It addition, above-mentioned brushless DC motor can also drive compressor.In the driving of above-mentioned compressor controls, it is not necessary to
As industrial servomotor control etc., high-precision rotating speed controls and accelerates to control, above-mentioned compressor be inertia ratio relatively
Big load, so being the considerably less load of variation of the speed in the short time.Therefore, even if speed becomes when busbar voltage declines
Dynamic also few, it is possible to carry out more stable driving.
It addition, above-mentioned compressor can also be reciprocating compressor.Thus, move back and forth is reciprocating, due to
Connecting on rotor in structure and have metallicity and the big bent axle of weight, piston, so inertia is very big, voltage can be more when reducing
Stably action.
It addition, the cold-producing medium used in above-mentioned compressor can be R600a.Thus, cylinder is made in order to obtain refrigerating capacity
Volume and inertia are relatively big, and then can carry out being not easy to be applied in the stable driving of the influence of change of torque.
Another mode of the present invention can also be a kind of electricity equipment, and it includes above-mentioned motor drive and by above-mentioned
The brushless DC motor that motor drive drives.Thus, in the case of being used for refrigerator as electricity equipment, due to above-mentioned electricity
Motivation driving means can miniaturization, it is possible to motor drive to be accommodated in the refrigerator carrying out certain speed driving
In little space, using the teaching of the invention it is possible to provide the cheap more preferable refrigerator of efficiency that can carry out speed change.It addition, be used for sending as electricity equipment
In the case of blower fan, owing to the inertia of pressure fan is very big, it is possible to realize carrying easy small-sized pressure fan.
Accompanying drawing used below describes embodiments of the present invention in detail.It addition, embodiments described below, all represent this
A preferred concrete example of invention.Numerical value shown in implementation below, shape, material, element, the joining of element
Seated position and connected mode, signal waveform, the moment etc. of signal, be an example, is not the purport limiting the present invention.This
Bright limited by the scope of claims.Thus, in the element of implementation below, about the upper representing the present invention
The element that the independent claims of concept are not recorded, is not configured to reach necessary to the problem solving the present invention, but
Illustrate as the element constituting preferred mode.
Fig. 1 is the block diagram of the motor drive 22 of embodiments of the present invention.In Fig. 1, alternating current power supply 1 is general
Power frequency supply, at 50 that Japan is virtual value 100V or the power supply of 60Hz.Motor drive 22 is connected with alternating current power supply 1,
Drive brushless DC motor 4.Hereinafter motor drive 22 is illustrated.
This motor drive 22, is the PWM control using the rotary speed that can arbitrarily change brushless DC motor 4
System, and with the smoothing capacity device with small capacitances independently can stablize smoothly driving brushless DC motor 4 motor drive
Dynamic device, has rectifier smoothing circuit 2, inverter 3 and control portion 30.
Rectifier smoothing circuit 2 is that the alternating electromotive force rectification from alternating current power supply 1 is smoothed the circuit into direct current power, including
Four commutation diode 2a～2d, the smoothing capacity device 2e and reactor 2f of bridge joint.Defeated from the output of rectifier smoothing circuit 2
Enter to inverter 3.Here, in rectifier smoothing circuit 2, four commutation diode 2a～2d are constituted the friendship from alternating current power supply 1
Stream electric power carries out the rectification part of rectification.
It addition, smoothing capacity device 2e and reactor 2f, it is set to that resonant frequency is than the alternating electromotive force from alternating current power supply 1
40 times of high frequencies of frequency, constitute partes glabra 2g.Thus, the electric current of resonant frequency becomes the scope that power high-order harmonic generation limits
Outward, it is possible to reduce higher harmonic current.It addition, be such value (small capacitances, details are aftermentioned) by making smoothing capacity device 2e, female
Line voltage contains big ripple component, and the electric current flowing to smoothing capacity device 2e from alternating current power supply 1 also becomes close to alternating current power supply 1
The electric current of frequency content, it is possible to reduce higher harmonic current.
It addition, reactor 2f is inserted between alternating current power supply 1 and smoothing capacity device 2e, so at commutation diode 2a～2d
Front or rear all right.And, reactor 2f, smooth the common-mode filter constituting higher hamonic wave removing unit is arranged at rectification
In the case of circuit 2, be equivalent to the synthetic ingredient of reactive component with this higher hamonic wave removing unit.
Inverter 3, will contain 2 doubling times of the power cycle of alternating current power supply 1 in the voltage from rectifier smoothing circuit 2
The direct current power of big ripple component be converted to alternating electromotive force.Inverter 3 is by by six switch element 3a～3f three-phase bridge
Connect and constitute.It addition, six back flow current diode 3g～3l are inversely connected in parallel with each switch element 3a～3f.That is, inverse
Become device 3, during using the circuit that connected and composed by a switch element and back flow current diodes in parallel as an arm, tool
There are three branch roads (leg) being connected in series by a upper arm and a underarm.
Brushless DC motor 4 includes having the rotor 4a of permanent magnet and have the stator of three-phase (U phase, V phase, W phase) winding
4b.Brushless DC motor 4, flows to the three-phase windings of stator 4b by the three-phase alternating current made by inverter 3, makes rotor 4a
Rotate.
Control portion 30, is that the driving signal in the supply moment that instruction inverter 3 is supplied power to brushless DC motor 4 is defeated
Go out the circuit to inverter 3, including position detection part 5, voltage detection department 6, speed estimating portion 7, switching part 8, position deduction portion
9, switch arm determination section 10, waveform generating unit 11 and drive division 12.
Here, the driving signal from control portion 30 output controls inverter 3, so that at the multiple arms constituting inverter 3
In the switch element of an arm carry out making this switch element that conducting of based on pulsewidth modulation (PWM) and disconnection are repeated
PWM output period, the switch element of an arm in multiple arms of opposite side upper and lower with this arm carry out conducting output so that
This switch element always turns on.Thus, by changing PWM duty cycle connection width, it is possible at random change brushless DC motor 4
Speed.
Now, control portion 30 output drive signal, so that when have switched the energized phase of brushless DC motor 4, and lead
The switch element of the arm leading to the arm opposition side of end of output begins to turn on output.That is, so that conducting exports seamlessly continuous print
Mode, switches the arm (i.e. switch element) of the object exported as conducting.Thus, when have switched energized phase, do not produce electric current
Flow through current path as the smoothing capacity device 2e of small capacitances, so steeply rising of busbar voltage is suppressed.The most right
The each element constituting control portion 30 is described in detail.
Position detection part 5 obtains the terminal voltage of brushless DC motor 4 in the present embodiment.That is, brushless DC electricity is detected
The magnetic pole of the rotor 4a of motivation 4 is relative to position.Specifically, position detection part 5 produces based on the three-phase windings at stator 4b
Induced voltage, the relative position of rotation of detection rotor 4a.It addition, as other method for detecting position, it is possible to enumerate electronic
The testing result of dynamo-electric stream (phase current or bus current) carries out vector calculus to the method carrying out the presumption of position of magnetic pole.
Voltage detection department 6 detect as dc bus between voltage (busbar voltage) smoothing capacity device 2e two ends electricity
Pressure.
Speed estimating portion 7 is according to the speed estimating brushless DC motor 4 of the change of the position detected by position detection part 5
Actuating speed.But, this speed estimating portion 7, is below the threshold value predetermined at the voltage detected by voltage detection department 6
Time stop speed estimating, the initial position detection carried out from position detection part 5 after busbar voltage becomes more than threshold value again
After start again at speed estimating.Stop the threshold value of speed estimating, be that the position detection in position detection part 5 becomes unstable mother
The value of line voltage, is predetermined by system.
Owing to becoming unstable when busbar voltage is below assigned voltage from the positional information of position detection part 5, institute
With switching part 8 the detected value of the busbar voltage detected by voltage detection department 6 as threshold value below in the case of, do not select position
The positional information of test section 5 and select the positional information in position deduction portion 9 to export.Detected by voltage detection department 6
In the case of magnitude of voltage is more than threshold value, switching part 8 selects the positional information of position detection part 5 to export again.
Position deduction portion 9 is according to the positional information exported from switching part 8 and the speed estimated by speed estimating portion 7, presumption
The relative position of the rotor 4a of brushless DC motor 4 also exports.Such as, in the case of the control cycle was 100 μ seconds, autotomy
Changing the relative position shown in the positional information in portion 8 is electric angle 60deg, speed estimating portion 7 speed estimated is the situation of 50r/s
Under, brushless DC motor 4 has the structure of 4 poles in the present embodiment, and power frequency becomes the 100Hz of 2 times of speed, so
Position deduction portion 9 exports the signal of phase place (3.6deg) advanced between 100 μ seconds plus the signal of 100Hz on 60deg,
The positional information of i.e. 63.6deg.
Switch arm determination section 10, based on the positional information exported by switching part 8, decide whether to make to include switch element 3a,
The upper arm of 3c and 3e and which in including the underarm of switch element 3b, 3d and 3f carry out switching and carrying out PWM output.
These can realize for the table of positional information simply by having in advance.In present embodiment, switch arm determination section 10,
About the change (that is, carry out PWM output at upper arm, or carry out PWM output at underarm) of the arm of the side carrying out PWM output,
Switching with the energized phase of brushless DC motor 4 determines simultaneously.
In present embodiment, upper and lower arm continues PWM output and the period of conducting output respectively, takes brushless DC motor 4
Phase angle be 60deg.In the case of on the basis of the zero crossing of induced voltage, (base) carries out position detection, can drive
The current value of the energized phase that dynamic scope exports stopping during 60deg is 0.That is, at least up to becoming 0 this rated current value
Constant conduction output till below.
Waveform generating unit 11, according to the positional information from switching part 8, determines the energized phase of brushless DC motor 4, output
Arm to the side determined by switch arm determination section 10 carries out the waveshape signal of PWM control.It addition, waveform generating unit 11, about
PWM duty cycle width, determines according to the difference of the target velocity managed by speed estimating portion 7 and waveform generating unit 11.It addition,
In present embodiment, by waveform generating unit 11 management objectives speed, even if from outside input target velocity also entirely without asking
Topic.Thereby, it is possible to according to the rotary speed from outside instruction change brushless DC motor 4.
It addition, waveform generating unit 11, utilize the busbar voltage that voltage detection department 6 detects, to carry when the decline of voltage
Anterior angle becomes big mode and is controlled.
Drive division 12, based on the waveshape signal exported from waveform generating unit 11, output instruction inverter 3 supplies power to nothing
The driving signal in the supply moment of the three-phase windings of brush DC motor 4.Specifically, signal is driven to make the switch unit of inverter 3
Part 3a～3f is turned on or off (being denoted as ON/OFF below).Thus, stator 4b is applied optimal alternating electromotive force, rotor 4a
Rotating, brushless DC motor 4 is driven.
Then, the electric equipment of the motor drive 22 using present embodiment is illustrated.As electricity equipment
One example, illustrates refrigerator 21.
Compressor 17 it is mounted with in refrigerator 21, but the rotary motion of the rotor 4a of brushless DC motor 4, pass through bent axle
(not shown) is converted to move back and forth.The piston (not shown) being connected with bent axle, by moving back and forth, by cylinder in cylinder
Refrigerant compression.That is, compressor 17 includes brushless DC motor 4, bent axle, piston, cylinder.
The compress mode (linkage) of compressor 17, it is possible to use the arbitrary modes such as rotary-type, Scrawl.In this reality
Execute mode, the situation of Reciprocatory is illustrated.The compressor 17 of Reciprocatory, the cylinder caused by the reciprocating motion of piston
Volume change compresses cold-producing medium, so inertia is big.Therefore, even if declining in busbar voltage, when torque reduces, brushless DC electric
The variation of the rotary speed of machine 4 is the least, so the driving of compressor 17 is stable.
Cold-producing medium used in compressor 17, generally R134a(HFC:Hydro Fluoro Carbon) etc., but this reality
Executing in mode, cold-producing medium uses R600a(iso-butane).Compared with R600a with R134a, global warming coefficient is less, and refrigerating capacity is low.
In the present embodiment, compressor 17 is made up of reciprocating-type compressor, and in order to ensure refrigerating capacity, increases volume of cylinder.
The compressor 17 that volume of cylinder is big, owing to inertia is big, even if so in the case of busbar voltage declines, brushless DC motor 4
Also rotate because of inertia.Thus, the variation of rotary speed tails off, it is possible to carries out more stable synchronization and drives.
Cold-producing medium after being compressed by compressor 17, passes sequentially through condenser 18, decompressor 19, vaporizer 20, again returns to
Compressor 17.Constitute such kind of refrigeration cycle.Now, owing to condenser 18 carries out heat release, vaporizer 20 absorbs heat, so energy
Enough cool down and heat.Load this kind of refrigeration cycle and constitute refrigerator 21.Herein, as the example of other electricity equipment, there is pressure fan,
Specifically, have and possess the pressure fan of the fan that brushless DC motor 4 is driven.
Then, the action to motor drive 22 configured as described above illustrates.First, about driving signal
Decision with the phase (arm) carrying out PWM output illustrates.Fig. 2 be represent electric angle 1 cycle present embodiment to inverter 3
The sequential chart of waveform driving signal.
In Fig. 2, each waveform is the driving signal for making switch element 3a, 3c, 3e, 3b, 3d, 3f ON/OFF.Open
Close the unit that element 3a～3f is the high level effectively (active high) making switching elements conductive when driving signal is high level
Part.Switch arm determination section 10 is as in figure 2 it is shown, have table in advance, so that on the basis of 30deg, carrying out by every 60deg switching
The arm of the side of PWM output.It is 30～90deg, 150～210deg, 270～330deg that upper arm carries out the phase place of PWM output,
In addition phase place underarm carries out PWM output.The arm of the side not carrying out PWM output is set to during this period for conducting output.
Represent that the waveform in the moment of energising is determined by waveform generating unit 11.I.e., in the present embodiment, waveform generating unit 11 uses
120deg square wave, makes switch element 3a, 3c, 3e of side arm 120deg that staggers respectively be energized.Lower side arm is the most wrong
Switch element 3b, 3d, 3f are energized with opening 120deg.About switch element 3a and 3b, 3c and 3d, 3e and 3f, respectively each other
Energising during between respectively there is 60deg disconnection during.Arm be by PWM output still become conducting output defer to switch arm
The decision of determination section 10, is set to that the switching of the arm of energising and the switching making the arm of which side up and down carry out PWM output are entered simultaneously
OK.
It addition, present embodiment illustrates in 120deg energising but it also may be driven with Radix Rumiciss such as 150deg.
Now, as in the control of 120deg, only passing through to make to become conducting state with the arm of the arm opposition side disconnected just can be easy
Ground realizes.Decline by becoming Radix Rumicis current peak, and teeth groove (cogging) constituent reduction of electric current, so by driving speed
The power high-order harmonic generation of the frequency content spending the long-pending performance with number of poles is relaxed.
Then, the waveform driving signal and the flowing of electric current when the energized phase to brushless DC motor 4 switches are said
Bright.Fig. 3 is the figure of the waveform driving signal and electric current of the present embodiment representing moment amplification energized phase switched.Fig. 4
It it is the figure of the current path representing present embodiment.
The V phase current of Fig. 3 is the electric current of the winding (V phase) flowing through the stator 4b being connected with switch element 3c and 3d.Fig. 3's
Bus current represents the electric current flowing to inverter 3 from smoothing capacity device 2e.
Phase place when time (4)～time (5) powered-on mode (energized phase) switching of Fig. 3 becomes the 90deg of Fig. 2.?
The time (1) of Fig. 3 and time (3), V phase current is by identical current path.Specifically, by following current path:
Smoothing capacity is again returned to by the switch element 3a and switch element 3d of inverter 3 as shown in Figure 4 (a) from smoothing capacity device 2e
Device 2e.
It addition, in time (2) of Fig. 3 and time (4), V phase current is by identical current path.Specifically, such as Fig. 4
B, shown in (), not from the current path of smoothing capacity device 2e, the electric current flowing through switch element 3a uses two poles by back flow current
Pipe 3h, becomes back flow current.
In this condition, move to the time (5), during energized phase switching, become shown in Fig. 4 (c) from the time (4) of Fig. 3
Current path.Owing to phase place is 90deg, so switching simultaneously with energized phase, the arm of PWM output is from upper arm (switch element 3a)
It is switched to underarm (switch element 3f).Thus, switch element 3a begins to turn on output, and switch element 3f starts PWM output.That is,
Switching with energized phase simultaneously, makes and turns on the arm (upper arm of arm (underarm (switch element the 3d)) opposition side of end of output
(switch element 3a)) become conducting output (having started conducting output).It addition, the arm of side at conducting end of output (under
Arm) start when exporting, to become PWM output next time, the control of this PWM output can continue to.But, in the time (5) of Fig. 3,
PWM is for disconnecting the moment, so conducting will not be immediately become.
Like this, while the conducting end of output as the switch element 3d of underarm, initially as the switch of upper arm
The conducting output of element 3a, so forming following loop (loop): V phase current passes through by after back flow current diode 3i
Switch element 3a, electric current flows (Fig. 4 (c)) to brushless DC motor 4.In switch element 3a, conducting is maintained at the 60deg phase
Between, so until V phase current becomes 0 switch element 3a constant conduction, not producing the current path to smoothing capacity device 2e,
Busbar voltage will not rise.That is, while the conducting end of output of an arm, the conducting output of the arm of opposition side starts, its phase
The period of the switch element constant conduction output of the arm tossed about, at least until the electric current flowing through the arm of conducting end of output becomes
Till below setting.
Also flow through V phase current (Fig. 3) in the time (6) of Fig. 3, but owing to switch element 3a is conducting, thus with Fig. 3 time
Between (5) same, do not produce V phase current and return to the path of smoothing capacity device 2e.Now switch element 3f is carrying out energized phase switching
Becoming conducting the most for the first time, so electric current begins to flow through the current path shown in Fig. 4 (d), bus current starts flowing.Due at figure
Time (7) the V phase current of 3 becomes 0(Fig. 3), so as the current path of current path, only Fig. 4 (d).Time at Fig. 3
(8), become the current path when PWM as prior art shown in Fig. 4 (e) disconnects, the most do not produce to smooth electricity
The current path of container 2e, does not cause the rising of busbar voltage.
Existing busbar voltage waveform Fig. 5 (a) during switching energized phase represents, during the switching energized phase of present embodiment
Busbar voltage with Fig. 5 (b) represent.In existing mode, there is energy during switching energized phase and fill in smoothing capacity device 2e
The current path of electricity, so as shown in the waveform 35 of Fig. 5 (a), busbar voltage steeply rises.On the other hand, in present embodiment
In, there is not, during switching energized phase, the current path that energy charges in smoothing capacity device 2e, so such as the bus electricity of Fig. 5 (b)
Shown in corrugating, there is not the rising of busbar voltage, it is possible to carry out stable smooth driving.
Then, the structure of the brushless DC motor 4 of present embodiment is illustrated.Fig. 6 represents present embodiment
The sectional view in the cross section vertical with rotary shaft of the rotor 4a of brushless DC motor 4.
Rotor 4a includes iron core 4g and four Magnet (permanent magnet) 4c～4f.Iron core 4g is by will be to 0.35～0.5mm
The thin silicon steel plate of degree carries out material stacking that stamping-out obtains and constitutes.Magnet 4c～4f, uses the ferrum element of circular shape
Body class permanent magnet, as it can be seen, to make the recess of circular shape be configured to centrosymmetry in the way of foreign side.It addition, conduct
Magnet 4c～4f, in the case of using the permanent magnet of the terres rares such as neodymium, can be writing board shape.
In the rotor 4a of such structure, now by from the center of rotor 4a in a Magnet (such as Magnet 4f)
The axle that goes of centre is referred to as d axle, by from the center of rotor 4a to a Magnet (such as Magnet 4f) and Magnet (such as magnetic adjacent thereto
Ferrum 4c) between the axle that goes be referred to as q axle.Here, d axial inductance Ld and q axial inductance Lq has inverse saliency, it is not
Identical.I.e., it means that, as motor, in addition to the torque (Magnet torque) that the magnetic flux of Magnet brings, effectively make
With utilizing inverse saliency torque (reluctance torque).Accordingly, as motor, it is possible to more effectively utilize torque.As a result of which it is,
As present embodiment, it is possible to obtain high efficiency motor.
It addition, in the present embodiment, owing to reducing the electric capacity of smoothing capacity device 2e, so producing arteries and veins in busbar voltage
Dynamic, the interval output torque declined in busbar voltage reduces.But, it is controlled such that by waveform generating unit 11 and examines with voltage
The decline of the busbar voltage of survey portion 6 detection makes angular amount in advance increase ordinatedly, it is possible to the minimizing of suppression output torque, it is possible to carry out
Stable driving.
It addition, the brushless DC motor 4 of present embodiment has the rotor 4a at iron core 4g embedment Magnet 4c～4f,
And have saliency.It addition, in addition to the Magnet torque of Magnet 4c～4f, also use the saliency reluctance torque brought.By
This, can not only improve efficiency during low speed, and can improve high-speed driving performance further.It addition, Magnet 4c～4f adopts
Improve the ratio of Magnet torque with rare earth element magnets such as neodymiums, or increase the difference of inductance Ld, Lq and improve the ratio of reluctance torque
During example, it is possible to improve efficiency by changing optimal ohmic heatingp.
Then, to the motor drive 22 of present embodiment being used for refrigerator 21 and air conditioner, compression is driven
The situation of machine 17 illustrates.In existing motor drive, smoothing capacity device, reactor are relatively big, are assembled into system
Need big space.But, smoothing capacity device 2e needs 400 μ about F in the prior art, can be by it in present embodiment
Reducing to number μ F, volume can be reduced to less than 1/3.It addition, as refrigerator 21 during the driving under low-load, reactor 2f
In the prior art for number milli H, it is possible to compensate with the inductance composition of wave filter (generally common-mode filter), it is possible to realize electronic
The significantly size of machine actuating device 22 declines and cost degradation.
It addition, only with certain speed drive compressor control system in, prior art can carry out variable-ratio
In the motor drive that degree drives, the narrow space of system, it is impossible to easily motor drive is assembled into system
In.But, in the present embodiment, due to can be by motor drive very miniaturization, so the restriction of installation space
Relaxed, it is possible to easily the motor drive that can carry out variable velocity driving is assembled into and only drives with certain speed
In dynamic compressor assembly.If speed variable, then can improve the system effectiveness of refrigerator, using the teaching of the invention it is possible to provide more save the ice of the energy
Case.
Like this, the motor drive 22 of present embodiment, it is connected with alternating current power supply 1, is had by switching multiple
The energized phase of the brushless DC motor 4 of winding makes brushless DC motor 4 rotate driving, and described motor drive includes: whole
Current circuit (commutation diode 2a～2d), it carries out rectification to the alternating electromotive force inputted from alternating current power supply 1；Partes glabra 2g, its by
Smoothing capacity device 2e and the reactor of value is determined in the way of becoming than the 40 of the frequency of alternating electromotive force times of high resonant frequencies
2f is constituted, and the output to carrying out self-rectifying circuit smooths；Inverter 3, it will used two poles by switch element and back flow current
When the circuit that pipe is constituted is as an arm, there is multiple upper arm and branch road that underarm is connected in series, will be obtained by partes glabra 2g
To direct current power be converted to alternating electromotive force, be supplied to brushless DC motor 4；With control portion 30, instruction inverter 3 is supplied by it
Electric power exports inverter 3 to the driving signal in the supply moment of brushless DC motor 4.Here, drive signal to control inverter
3 so that the switch element of an arm in multiple arms carries out making this switch element that conducting of based on pulsewidth modulation is repeated
With the period of the PWM output disconnected, the switch element of an arm in multiple arms of opposition side upper and lower with this arm carries out turning on defeated
Go out so that this switch element always turns on.And, control portion 30 output drive signal, so that at switching brushless DC motor 4
Energized phase time, begin to turn on output with the switch element of the arm of the arm opposition side of conducting end of output.Thus, even if switching
The energized phase of brushless DC motor 4, the path of the energy return brushless DC motor 4 of accumulation in the energized phase of disconnection is the most always deposited
In being inverter 3, energy does not returns to the smoothing capacity device 2e of small capacitances, and steeply rising of busbar voltage is suppressed, institute
So that the small-sized and cheap motor drive of the stable smooth driving that can carry out brushless DC motor 4 can be provided.
It addition, as rectifier smoothing circuit 2, including to become than the 40 of the frequency of alternating current power supply 1 times of high resonant frequencies
Mode determine value smoothing capacity device 2e and reactor 2f constitute, the electric current thus flowed because of resonance higher hamonic wave electricity
Outside the scope that source limits, it is possible to reduce higher harmonic current.
It addition, as rectifier smoothing circuit 2, including to become than the 40 of the frequency of alternating current power supply 1 times of high resonant frequencies
Mode determine value smoothing capacity device 2e and reactor 2f constitute, thus smoothing capacity device becomes small capacitances, dash current
Peak-fall, it is possible to reduce higher harmonic current.
It addition, in the present embodiment, control portion 30 and then when switching the energized phase of brushless DC motor 4, in conduct
Before the busbar voltage of the voltage of partes glabra 2g output rises to assigned voltage, make and turn on the arm opposition side of end of output
Arm switch element conducting output start.Thereby, it is possible to busbar voltage suppression is become problem for busbar voltage rises
Overvoltage and the instability etc. of driving affect impossible voltage rising value, using the teaching of the invention it is possible to provide stable motor-driven dress
Put.
It addition, in the present embodiment, with the switch element constant conduction of the arm of the arm opposition side turning on end of output
The period of output, at least until the electric current flowing through the arm of conducting end of output becomes below setting.Thus, bus
Voltage rises the electric current inflow smoothing capacity device 2e that also will not become below the current value of problem, it is possible to carry out more stable driving
Dynamic.
It addition, in the present embodiment, with the switch element constant conduction of the arm of the arm opposition side turning on end of output
The period of output, for until the energized phase of brushless DC motor 4 switches next time.Thus, the setting of powered-on mode becomes
Easily, can simplify for software and the system driven, it is possible to improve maintainability and quality.
It addition, in present embodiment, the rotor 4a of brushless DC motor 4 is by imbedding Magnet (permanent magnet) 4c at iron core 4g
～4f and constitute, and have saliency.Thus, in the driving of brushless DC motor 4, together with the Magnet torque of permanent magnet, also
Can effectively utilize saliency reluctance torque, thus waveform generating unit 11 more to decline advance angle for busbar voltage the biggest, output
The reduction of torque is relaxed, and it is possible to carry out more stable driving.
It addition, in the present embodiment, brushless DC motor 4 drives compressor 17.In the driving of compressor 17 controls,
Need not as industrial servomotor control etc., high-precision rotating speed controls and accelerates to control, and compressor 17 is inertia
Bigger load, so being the considerably less load of variation of the speed in the short time.Therefore, even if busbar voltage declines, speed
Degree variation is also few, it is possible to carry out more stable driving.
It addition, in the present embodiment, compressor 17 is reciprocating compressor.Thus, move back and forth is reciprocating,
Structurally connecting at rotor and have metallicity and the big crankshaft and piston of weight, so inertia is very big, voltage can when reducing
More stably action.
It addition, in present embodiment, the cold-producing medium used in compressor 17 is R600a.Thus, in order to obtain the energy that freezes
Power, volume of cylinder and inertia become big, and then can carry out being not easy the stable driving of the variation that impact applies torque.
It addition, as the electric equipment of the motor drive 22 using present embodiment, in the case of refrigerator 21,
Due to motor drive can miniaturization, it is possible to be accommodated in the little space of the refrigerator carrying out certain speed driving,
The more preferable refrigerator of efficiency 21 that can provide cheap.
Additionally as electricity equipment in the case of pressure fan, the inertia of pressure fan is very big, it is possible to realization can
Carry out stable driving, and carry easy small-sized pressure fan.
Above, to the motor drive of the present invention and its electric equipment is used to be illustrated based on embodiment,
But the invention is not restricted to such embodiment.Without departing from the spirit and scope of the invention, each embodiment is implemented this
Mode obtained by the various deformation that skilled person expects, by mode obtained by the element combination in any of embodiment,
It is also contained in the present invention.
Industrial utilizability
The motor drive of the present invention, by smoothing capacity device small capacitances, small-sized and can stably smooth
Drive.Thus, the motor drive of the present invention is applicable not only to refrigerator and pressure fan, it is also possible to be applicable to automatic vending
Machine, showcase, the compressor of Teat pump boiler.Additionally, washing machine, vacuum cleaner, pump etc. use the electric equipment of brushless DC motor
Miniaturization also be able to use the present invention motor drive.
Symbol description
1 alternating current power supply
2 rectifier smoothing circuits
2a, 2b, 2c, 2d commutation diode
2e smoothing capacity device
2g partes glabra 2g
2f reactor
3 inverters
3a, 3b, 3c, 3d, 3e, 3f switch element
3g, 3h, 3i, 3j, 3k, 3l back flow current diode
4 brushless DC motors
4a rotor
4b stator
4c, 4d, 4e, 4f Magnet (permanent magnet)
4g iron core
5 position detection parts
6 voltage detection departments
7 speed estimating portions
8 switching parts
9 position deduction portions
10 switch arm determination sections
11 waveform generating units
12 drive divisions
17 compressors
18 condensers
19 decompressors
20 vaporizers
21 refrigerators (electricity equipment)
22 motor drives
30 control portions
Claims (9)
1. a motor drive, it is characterised in that:
Described motor drive is connected with alternating current power supply, is had the energising of the brushless DC motor of multiple winding by switching
Carry out described brushless DC motor mutually rotating driving,
Described motor drive includes:
Rectification circuit, its alternating electromotive force to inputting from described alternating current power supply carries out rectification；
Partes glabra, it includes capacitor and reactor, smooths the output from described rectification circuit, described capacitor and
The resonant frequency of reactor is higher than the 40 of the frequency of described alternating electromotive force times；
Inverter, its using include switch element and back flow current diode circuit as an arm time, there is multiple upper arm
The branch road being connected in series with underarm, is converted to alternating electromotive force by the direct current power obtained by described partes glabra, and is supplied
It is given to described brushless DC motor；With
Control portion, it is by defeated for the driving signal in the supply moment indicating described inverter to supply power to described brushless DC motor
Go out to described inverter,
Described driving signal controls described inverter so that the switch element of an arm in the plurality of arm carries out making this open
Closing the period that element is repeated the PWM output of conducting based on pulsewidth modulation and disconnection, opposite side upper and lower with this arm is many
The switch element of an arm in individual arm carries out conducting and exports so that this switch element always turns on,
Described control portion exports described driving signal so that when switching the energized phase of described brushless DC motor, defeated with conducting
The switch element of the arm going out the arm opposition side finished begins to turn on output, does not the most produce electric current and flows through in described partes glabra
The current path of described capacitor, described partes glabra includes so that resonant frequency is higher than the 40 of the frequency of described alternating electromotive force times
Mode sets the described capacitor of value and described reactor.
2. motor drive as claimed in claim 1, it is characterised in that:
Control portion is also when have switched the energized phase of described brushless DC motor, as the voltage exported from described partes glabra
Before busbar voltage rises to assigned voltage, leading of the switch element of the arm of the arm opposition side made with described conducting end of output
Logical output starts.
3. motor drive as claimed in claim 1, it is characterised in that:
The period of the switch element constant conduction output of the arm of the arm opposition side with described conducting end of output, at least until
Till the electric current of the arm flowing through described conducting end of output becomes below setting.
4. motor drive as claimed in claim 1, it is characterised in that:
The period of the switch element constant conduction output of the arm of the arm opposition side with described conducting end of output, for until described
Till the energized phase of brushless DC motor switches next time.
5. motor drive as claimed in claim 1, it is characterised in that:
The rotor of described brushless DC motor is consisted of embedment permanent magnet in the core, and has saliency.
6. the motor drive as according to any one of Claims 1 to 5, it is characterised in that:
Described brushless DC motor drives compressor.
7. motor drive as claimed in claim 6, it is characterised in that:
Described compressor is reciprocating compressor.
8. motor drive as claimed in claim 7, it is characterised in that:
The cold-producing medium used in described compressor is R600a.
9. an electric equipment, it is characterised in that including:
Motor drive according to any one of Claims 1 to 5；With
The brushless DC motor driven by described motor drive.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011082483A JP2012222842A (en) | 2011-04-04 | 2011-04-04 | Motor drive device and electric appliance using the same |
| JP2011-082483 | 2011-04-04 | ||
| PCT/JP2012/001050 WO2012137399A1 (en) | 2011-04-04 | 2012-02-17 | Motor drive device and electric appliance using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103460596A CN103460596A (en) | 2013-12-18 |
| CN103460596B true CN103460596B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280016932.4A Expired - Fee Related CN103460596B (en) | 2011-04-04 | 2012-02-17 | Motor drive and the electric equipment using it |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2012222842A (en) |
| CN (1) | CN103460596B (en) |
| BR (1) | BR112013024711A2 (en) |
| WO (1) | WO2012137399A1 (en) |
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|---|---|---|---|---|
| JP6134905B2 (en) * | 2013-03-15 | 2017-05-31 | パナソニックＩｐマネジメント株式会社 | MOTOR DRIVE DEVICE AND ELECTRIC DEVICE USING THE SAME |
| JP6383940B2 (en) * | 2014-03-06 | 2018-09-05 | パナソニックＩｐマネジメント株式会社 | Motor drive device |
| JP6499752B2 (en) * | 2015-04-07 | 2019-04-10 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN107749725B (en) * | 2017-10-20 | 2020-04-07 | 哈尔滨工程大学 | Commutation correction method of position-sensorless direct-current brushless motor |
| JP7308389B2 (en) * | 2018-06-19 | 2023-07-14 | パナソニックＩｐマネジメント株式会社 | Motor drive device and refrigerator using the same |
| CN109660183B (en) * | 2018-12-24 | 2021-03-12 | 哈尔滨工业大学 | Capacitor miniaturization motor driving device |
| JP6776432B2 (en) * | 2019-11-06 | 2020-10-28 | 株式会社ミツバ | Rotating electric machine control system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399402A (en) * | 2001-07-19 | 2003-02-26 | 松下电器产业株式会社 | Motor driver for washing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259281A (en) * | 2000-03-17 | 2001-09-25 | Matsushita Electric Ind Co Ltd | Electric washing machine |
| JP4467520B2 (en) * | 2003-09-05 | 2010-05-26 | パナソニック株式会社 | Permanent magnet synchronous motor driving apparatus and driving method for expanding weakening magnetic flux region |
| JP2011010432A (en) * | 2009-06-25 | 2011-01-13 | Panasonic Corp | Motor drive device |
| JP5402311B2 (en) * | 2009-06-26 | 2014-01-29 | パナソニック株式会社 | Motor drive device and electric apparatus using the same |
-
2011
- 2011-04-04 JP JP2011082483A patent/JP2012222842A/en active Pending
-
2012
- 2012-02-17 CN CN201280016932.4A patent/CN103460596B/en not_active Expired - Fee Related
- 2012-02-17 WO PCT/JP2012/001050 patent/WO2012137399A1/en active Application Filing
- 2012-02-17 BR BR112013024711A patent/BR112013024711A2/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399402A (en) * | 2001-07-19 | 2003-02-26 | 松下电器产业株式会社 | Motor driver for washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112013024711A2 (en) | 2016-12-20 |
| WO2012137399A1 (en) | 2012-10-11 |
| CN103460596A (en) | 2013-12-18 |
| JP2012222842A (en) | 2012-11-12 |
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