CN104009692A - Motor control device and air conditioner using same - Google Patents

Abstract

The subject of the invention provides an efficient motor control device capable of reducing noise caused by resonance of fans and rotators. The motor control device is provided with an inverter connected to a DC power source and used for converting DC power into variable voltage variable frequency AC power and performing driving control on a three-phase motor; a vector control part for applying voltage on the three-phase motor performing load rotary driving; a high-order component generation part used for calculating high-order components of fundamental waves of applied voltage of the vector control part; a voltage adding part for adding the high-order components calculated by the high-order component generation part to the applied voltage calculated by the vector control part; and a PWM pulse generation part for performing pulse width control on the inverter according to the signals of the voltage adding part, the voltage adding part adding the high-order components to the applied voltage so as to reduce resonant voice.

Description

Controller for motor and the air conditioner that has used this controller for motor

Technical field

The air conditioner that the present invention relates to a kind of control method of controller for motor and used the control method of this controller for motor.Particularly relate to a kind of technology that reduces the sound that motor that fan uses causes.

Background technology

In the past, for the small-sized fans motor of air conditioner, the noise producing under the specific rotation speeds that the resonance of rotor and fan of take is reason became problem.In order to solve the problem of the noise that this resonance causes, in rotor portions, vibration-proof rubber is set, or vibration-proof rubber is set and has reduced sound at the bearing portion of fan.

As one of its reason, can enumerate the distortion of the current waveform that distortion and the difference that applies voltage of the induced voltage of motor cause, proposed for eliminating the whole bag of tricks of this current waveform distortion.

For example, following technology being disclosed in patent documentation 1: by offsetting, take the distortion of induced voltage for rising thereby the voltage of the torque pulsation of generation is made as induced voltage pulsation table in advance, and to be added to command voltage.

In addition, following control method being disclosed in patent documentation 2: in order to realize high-efficiency operation, according to the two-dimensional coordinate of the mapping graph of torque and rotational speed or id electric current (d axle), iq electric current (q axle), carrys out switch modulation mode.

Patent documentation 1: TOHKEMY 2008-219966 communique

Patent documentation 2: TOHKEMY 2005-229676 communique

Summary of the invention

Yet the method for vibration-proof rubber is set in order to reduce the resonance sound of fan and rotor, and there are the following problems: become complicated, cost of the structure of motor, fan uprises.

In addition, the inventor has confirmed can not eliminate the resonance sound of fan and rotor by experiment in the technology of the disclosed current sinusoidal ripple of patent documentation 1.

In addition, the inventor confirmed by experiment in the method for the disclosed switch modulation mode of patent documentation 2, existence can eliminate fan and rotor resonance sound situation and can not eliminate the situation of the resonance sound of fan and rotor.

Therefore, problem of the present invention is, the high efficiency controller for motor of the sound that a kind of resonance that has reduced fan and rotor causes is provided.

Controller for motor of the present invention, possesses: inverter, be connected in DC power supply, and the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, drive and control 3 phase motors; Vector control portion, the voltage that computing applies to the 3 phase motors that load are rotated to driving; High-order component generating unit, the high-order component of executing alive first-harmonic of vectors control part; Voltage addition portion, the voltage that applies calculating to vector control portion is added the high-order component that high-order component generating unit calculates; And pwm pulse generating unit, according to the signal of this voltage addition portion, inverter is carried out to pulse width control, wherein, the resonance sound producing for the resonance by 3 phase motors and its load, the high-order component of the number of times that the computing of high-order component generating unit represents with the resonance frequency of resonance sound and the ratio of motor frequency, voltage addition portion is added to high-order component to apply voltage, reduces thus resonance sound.

According to the present invention, can provide the high efficiency controller for motor of the sound that a kind of resonance that has reduced fan and rotor causes.

Accompanying drawing explanation

Fig. 1 means the internal structure of controller for motor of the 1st execution mode of the present invention and the associated figure between this d.c. motor control device, power supply, 3 cross streams synchronous motors and load.

Fig. 2 means the figure that uses rotating coordinate system is added method from the high-order component of high-order component generating unit to the first-harmonic of vector control portion in the 1st execution mode of the present invention in voltage addition portion.

Fig. 3 means the figure that uses fixed coordinate system is added method from the high-order component of high-order component generating unit to the first-harmonic of vector control portion in the 1st execution mode of the present invention in voltage addition portion.

Fig. 4 means the figure to the characteristic of the fan noise of rotating speed and sound frequency.

Fig. 5 means and is applying 130min ^-1the situation of the high-order component of 36 times under the figure of noise variation.

Fig. 6 means the figure of an example of control that rotating speed has been applied to the high-order component of a plurality of number of times.

Fig. 7 means the internal structure of controller for motor of the 2nd execution mode of the present invention and the associated figure between this d.c. motor control device, power supply, 3 cross streams synchronous motors and load.

Fig. 8 means the figure that uses rotating coordinate system is added method from the high-order component of high-order component generating unit to the first-harmonic of vector control portion in the 2nd execution mode of the present invention in current summation portion.

Fig. 9 means the figure that uses fixed coordinate system is added method from the high-order component of high-order component generating unit to the first-harmonic of vector control portion in the 2nd execution mode of the present invention in current summation portion.

Figure 10 means general 3 figure of the voltage waveform of the U phase in modulation, V phase, W phase mutually.

Figure 11 means the figure as the voltage waveform of the U phase in the fixedly phase 60 degree switching modes of 2 phase modulation systems, V phase, W phase.

Figure 12 means the figure as the voltage waveform of the U phase in the upper fixedly phase 120 degree switching modes of 2 phase modulation systems, V phase, W phase.

Figure 13 means the figure as the voltage waveform of the U phase in the lower fixedly phase 120 degree switching modes of 2 phase modulation systems, V phase, W phase.

Figure 14 means the internal structure of controller for motor of the 3rd execution mode of the present invention and the associated figure between this d.c. motor control device, power supply, 3 cross streams synchronous motors and load.

Figure 15 means the figure of structure of the air conditioner of the 4th execution mode of the present invention.

Description of reference numerals

11,108: controller for motor; 12: DC power supply; 13: motor, 3 phase motors, 3 cross streams synchronous motors; 14: load, fan; 15: inverter, power transformation circuit; 16: DC bus current testing circuit; 17,18,20: control device; 21: vector control portion; 22: high-order component generating unit; 23: voltage addition portion; 24:PWM pulse generate portion; 25: instruction current generating unit; 26: current summation portion; 27: voltage instruction operational part; 28: high-order component correction unit; 29: modulation system selection portion; 51: power converter main circuit; 52: gate drivers; 100: air conditioner; 101: off-premises station; 102: indoor set; 103: pipe arrangement; 104: compressor; 105: heat exchanger (outdoor heat exchanger); 106: outdoor fan; 107: outdoor fan motor; 109: heat exchanger (indoor heat exchanger); 110: forced draft fan.

Embodiment

The controller for motor of the present embodiment, possesses: inverter, be connected in DC power supply, and the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, motor is driven to control; Vector control portion, the voltage that computing applies to the described motor that load is rotated to driving; High-order component generating unit, the high-order component of executing alive first-harmonic of vector control portion described in computing; Voltage addition portion, the voltage that applies that described vector control portion is calculated is added the high-order component that described high-order component generating unit calculates; And pwm pulse generating unit, according to the signal of this voltage addition portion, described inverter is carried out to pulse width control, wherein, the resonance sound producing for the resonance by described motor and this load, the computing of described high-order component generating unit is with the high-order component of the represented number of times of the resonance frequency of described resonance sound and the ratio of motor frequency (the resonance frequency cycle/motor frequency of described resonance sound), and described voltage addition portion is added to described high-order component to apply voltage.

In addition, the controller for motor of the present embodiment, possesses: inverter, be connected in DC power supply, and the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, motor is driven to control; Instruction current operational part, the electric current of described motor is flow through in computing; High-order component generating unit, computing is as the high-order component of the first-harmonic of the instruction current of the output of described instruction current operational part; Current summation portion, is added to described instruction current the described high-order component that described high-order component generating unit calculates; Vector control portion, is applied to the voltage of described motor according to the output computing of described current summation portion; And pwm pulse generating unit, according to the signal of described vector control portion, described inverter is carried out to pulse width control, wherein, the resonance sound producing for the resonance by described motor and this load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency (the resonance frequency cycle/motor frequency of described resonance sound), described current summation portion is added to instruction current by described high-order component.

In addition, the controller for motor of the present embodiment, possesses: inverter, be connected in DC power supply, and the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, motor is driven to control, vector control portion, the voltage that computing applies to the described motor that load is rotated to driving, high-order component generating unit, the high-order component of executing alive first-harmonic of vector control portion described in computing, pwm pulse generating unit, has and comprises a plurality of modulation systems of fixing 2 phase modulation systems, according to the signal of described voltage addition portion, described inverter is carried out to pulse width control, and voltage addition portion, there is high-order component correction unit corresponding with a plurality of modulation systems and that proofread and correct described high-order component, the voltage that applies calculating to described vector control portion is added the high-order component that described high-order component correction unit calculates, wherein, the resonance sound producing for the resonance by described motor and this load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency (the resonance frequency cycle/motor frequency of described resonance sound), the described high-order component of described high-order component having been proofreaied and correct by described voltage addition portion is added to and applies voltage.

In addition, the controller for motor of the present embodiment, possesses: inverter, be connected in DC power supply, and the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, motor is driven to control, instruction current operational part, the electric current of described motor is flow through in computing, high-order component generating unit, computing is as the high-order component of the first-harmonic of the instruction current of the output of described instruction current operational part, current summation portion, have high-order component correction unit corresponding with a plurality of modulation systems and that proofread and correct described high-order component, to described instruction current, is added the described high-order component that described high-order component correction unit has been proofreaied and correct, vector control portion, is applied to the voltage of described 3 phase motors according to the output computing of described current summation portion, and pwm pulse generating unit, have and comprise a plurality of modulation systems of fixing 2 phase modulation systems, according to the signal of described vector control portion, described inverter is carried out to pulse width control, wherein, the resonance sound producing for the resonance by described motor and this load, the computing of described high-order component generating unit is with the high-order component of the represented number of times of the resonance frequency of described resonance sound and the ratio of motor frequency (the resonance frequency cycle/motor frequency of described resonance sound), according to modulation system, the described high-order component of described high-order component correction unit having been proofreaied and correct by described current summation portion is added to described instruction current.

Explanation is for implementing the mode (being called " execution mode " below) of the application's invention with reference to the accompanying drawings.The controller for motor of the 1st execution mode of the present invention is described with reference to Fig. 1～Fig. 3.Fig. 1 means the internal structure of controller for motor 11 of the 1st execution mode of the present invention and the associated figure between this controller for motor 11, DC power supply 12,3 cross streams synchronous motors (suitably referred to as " motor " or " 3 phase motor ") 13 and load (fan) 14.

In Fig. 1, controller for motor 11 is configured to be possessed as the inverter 15 of DC-AC power converter and the control device 17 of control inverter 15.

In addition, control device 17 possesses PWM(Pulse Width Modulation: pulse-width modulation) pulse generate portion 24, vector control portion 21, high-order component generating unit 22 and voltage addition portion 23 and form.

The controller for motor 11 of the 1st execution mode is characterised in that, control device 17 possesses high-order component generating unit 22, carries out PWM while controlling, from high-order component generating unit 22 to voltage addition portion 23 mutually alive high-order components at 17 pairs of inverters of control device 15.By the method, eliminate the noise that the resonance of motor 13 and fan 14 as load causes.

Before describing in detail and take and eliminate the controller for motor 11 of the 1st execution mode that the method for the noise that this resonance causes is feature, the noise that the resonance of motor and fan causes is first described, explains again afterwards the controller for motor 11 of the 1st execution mode of Fig. 1.

Explanation is by motor 13(Fig. 1) carry out drive fan 14(Fig. 1) time fan 3 noise that produces.

The figure of the noise that Fig. 4 means fan 14 to the characteristic of rotating speed example.In addition in the back Fig. 2, Fig. 3 are described.

In Fig. 4, transverse axis is rotating speed [min ^-1], the longitudinal axis is sound frequency, the concentration of color represents noise [dB].In addition rotating speed [min, ^-1] be rotating speed/minute.In addition, with rpm(rotation per minute: rotating speed per minute) suitable.In addition, below for example by 520 rotating speeds/minute as 520min ^-1simplify like that statement.Data are with every 10min ^-1assign rotating speed and obtain data.It is near 280Hz, 310Hz that dark position appears at sound frequency, but known have rotating speed that sound is large and a little rotating speed.Here the rotating speed that sound is large is at 780min ^-1, 520min ^-1, 390min ^-1, 270min ^-1, 130min ^-1near.This be because with high rotating photo than low when rotation the sound that produces of fan total little, even if therefore the absolute value of the noise of the frequency of 310Hz is little, also have the such feature of sense of hearing variation.

If by rotating speed 780min ^-1be made as benchmark, motor is 3 cross streams synchronous motors, if therefore the number of poles of motor is 8 utmost points, the electric frequency of motor is 52Hz[780/{60 * (2/8) }].Knownly take this 52Hz and by near the torque of shaking of the adding 312Hz of 6 component of degree n ns, produced sound as fundamental frequency.If launch this idea, 520,390,310,260,190,160,130,110min ^-1become successively 9 times, 12 times, 15 times, 18 times, 24 times, 30 times, 36 times, 42 times.In curve, the relation of the frequency of each number of times and rotation speed of the fan is represented with straight dashed line, the point that the resonance frequency (solid line in curve) of this straight line and sound intersects represents to produce the rotating speed of resonance sound and frequency now.

Thereby, in order to eliminate the resonance sound of fan 14 and motor (rotor of motor) 13, take the countermeasure to these high-order components.

(structure of controller for motor: they are two years old)

Again explain the structure of controller for motor 11 of the 1st execution mode of the present invention of Fig. 1.

As mentioned above, Fig. 1 means the structure of controller for motor 11 of the 1st execution mode of the present invention and the associated figure between DC power supply 12, motor 13 and fan (load) 14.

In Fig. 1, controller for motor 11 is accepted direct current power and is transformed to 3 cross streams electric power from DC power supply 12.In addition, motor (3 cross streams synchronous motor) 13 is provided 3 cross streams electric power from controller for motor 11, thereby driven control and rotating makes fan 14 be rotated driving thus.

Then, describe controller for motor 11 in detail.

In Fig. 1, controller for motor 11 is configured to and possesses the inverter 15(power converter that direct current power is transformed to 3 cross streams electric power of variable voltage variable frequency as described above) and the control device 17 of control inverter 15.In addition, DC bus current testing circuit 16 is arranged in the DC power supply of inverter 15.

In addition, inverter 15 be configured to possess by with IGBT(Insulated Gate Bipolar Transistor: insulated gate bipolar transistor) etc. the power converter main circuit 51 that the diode element that thyristor reverse parallel connection is connected forms and according to the pwm pulse signal 17A from pwm pulse generating unit 24 described later, produce IGBT(Sup, Sun, Svp, Svn, Swp, the Swn to power converter main circuit 51) the gate drivers 52 of signal.

IGBT is connected in series and forms IGBT(Sup, the Sun of a phase) be connected between DC power supply 12, upper arm separately (Sup) and the tie point of underarm (Sup) become ac output end of U phase.

Similarly be connected in series and form IGBT(Svp, the Svn of a phase) be connected between DC power supply 12, upper arm separately (Svp) and the tie point of underarm (Svn) become ac output end of V phase.

In addition, be connected in series and form IGBT(Swp, the Swn of a phase) be connected between DC power supply 12, upper arm separately (Swp) and the tie point of underarm (Swn) become ac output end of W phase.

Control device 17 is via 52 couples of above IGBT(Sup, Sun, Svp, Svn, Swp, Swn of gate drivers) control rightly, the direct current power of DC power supply 12 is from 3 cross streams electric power of the ac output end output variable voltage variable frequency of described U phase, V phase, W phase thus.

In addition, control device 17 be configured to possess pwm pulse generating unit 24, vector control portion 21, high-order component generating unit 22 and voltage addition portion 23.

Vector control portion 21 take and goes out the motor rotary speed/phase information 21A that applies voltage instruction 21B and permanent magnet synchronous motor 13 to the first-harmonic of permanent magnet synchronous motor 13 by the detected DC bus current information of DC bus current testing circuit 16 (being suitably expressed as " information of phase current ") 16A as basic calculation.

In addition, high-order component generating unit 22 be take motor rotary speed/phase information 21A as the basic high-order component 22A that exports the voltage of permanent magnet synchronous motors 13 to voltage addition portion 23.

In addition, 23 pairs of first-harmonics of voltage addition portion apply the mutually alive high-order component 22A of voltage instruction 21B and export and apply voltage instruction 23A.

In addition, pwm pulse generating unit 24 be take and applied voltage instruction 23A and the inner carrier signal having converts to pwm pulse signal 17A as basis.

In addition, the vector control of vector control portion 21 for example can be by being used " " examining (using at a high speed the discussion of the new vector control mode of permanent magnet synchronous motor) by the imperial mode of the new ベ Network of permanet magnet モ same period ー タ ト Le system at a high speed " electricity opinion D, Vol.129(2009) No.1pp.36-45 ", " " Jia Electricity Machine device is to the easy ベ Network of け position セ Application サ レ ス permanet magnet モ same period ー タ Jane ト Le system imperial (the simple vector control of the position-sensor-free permanent magnet synchronous motor of object appliance equipment) " electricity opinion D, Vol.124(2004) No.11pp.1133-1140 " shown in mode realize.

DC bus current testing circuit 16 is connected in the DC bus of the minus side of DC power supply 12, obtains the mixed phase current information of carrying of pulsating current of U phase, V phase, W phase.The phase current information getting is as DC bus current information (information of phase current) 16A and to 21 outputs of vector control portion.

In addition the method for, obtaining phase current information is such as realizing by No. 2004-48886 disclosed mode of TOHKEMY etc.

In the 1st execution mode, take following structure: in order to reduce noise, high-order component generating unit 22 and voltage addition portion 23 by the voltage shown in below apply high-order component.

Below, with reference to Fig. 2, Fig. 3, illustrate formation voltage high-order component 22A high-order component generating unit 22 and high-order component 22A is applied to the action of the voltage addition portion 23 that voltage instruction 21B is added to first-harmonic.

In high-order component generating unit 22, use the value of G in predefined (numerical expression 2) described later, (numerical expression 4) and φ and take motor rotary speed/phase information 21A and as basis, generate high-order component, by high-order component 22A to 23 outputs of voltage addition portion.

In voltage addition portion 23, the high-order component 22A phase adduction that the first-harmonic of vector control portion 21 outputs is applied to the voltage of voltage instruction 21B and 22 outputs of high-order component generating unit is exported to pwm pulse generating unit 24.

As concrete structure, there are addition in rotating coordinate system and the addition in fixed coordinate system.Then, these methods are described in order.

The mode of the addition in rotating coordinate system is described with reference to Fig. 2.

Fig. 2 means in the 1st execution mode of the present invention the figure that uses rotating coordinate systems are added method from the high-order component of high-order component generating unit 22 (the high-order component 22A of voltage) to the first-harmonic (first-harmonic applies voltage instruction 21B) of vector control portion 21 by voltage addition portion 23.

In Fig. 2, it is benchmark that the magnet flow direction (d axle) of motor rotor be take according to the information 16A of phase current in vector control portion 21, exports first-harmonic and apply voltage instruction 21B(Vd in the dq reference axis of the rotating coordinate system as based on this d axle and right angle orientation (q axle) ^*, Vq ^*) and motor rotary speed/phase information 21A.In addition Vd, ^*about d axle, Vq ^*that first-harmonic about q axle applies voltage instruction 21B(Fig. 1).

High-order component generating unit 22 generates the high-order component 22A-d(d axle in dq reference axis according to the motor rotary speed/phase information 21A from vector control portion 21), 22A-q(q axle).In addition, high-order component 22A-d, 22A-q are suitable with high-order component 22A in Fig. 1.

Voltage addition portion 23 applies voltage instruction (Vd at d axle by first-harmonic ^*) and high-order component 22A-d be added and output d axle apply voltage instruction 23A-d.

In addition, voltage addition portion 23 applies voltage instruction (Vq at q axle by first-harmonic ^*) and high-order component 22A-q be added and output q axle apply voltage instruction 23A-q.

In addition, apply voltage instruction 23A-d, 23A-q by not having illustrated transformation component to be transformed to the component of U phase, V phase, W phase and being input to pwm pulse generating unit 24(Fig. 1).

The mode of the addition in fixed coordinate system is described with reference to Fig. 3 in addition.

Fig. 3 means in the 1st execution mode of the present invention the figure that uses fixed coordinate systems are added method from the high-order component of high-order component generating unit 22 (the high-order component 22A of voltage) to the first-harmonic (first-harmonic applies voltage instruction 21B) of vector control portion 21 by voltage addition portion 23.

In Fig. 3, the first-harmonic that vector control portion 21 exports the three-phase alternating current of fixed coordinate system according to the information 16A of phase current applies voltage instruction 21B(Vu ^*, Vv ^*, Vw ^*) and motor rotary speed/phase information 21A.

High-order component generating unit 22 is according to generate high-order component 22A-U, 22A-V, the 22A-W of each phase from the motor rotary speed/phase information 21A of vector control portion 21.

Voltage addition portion 23 applies voltage instruction 21B(Vu for the first-harmonic of the three-phase alternating current of each addition fixed coordinate system of each phase (U, V, W) ^*, Vv ^*, Vw ^*) and high-order component 22A-U, 22A-V, 22A-W, output applies voltage instruction 23A-U, 23A-V, 23A-W respectively.

Then the n that, motor rotary speed is described doubly descends the fan 14 of generation and the reduction method of the resonance sound of rotor (rotor of motor 13).

It is cause that the vibration of direction of rotation is take in fan 14 and the resonance of rotor (13), and the voltage of each phase of motor or electric current are different with reference axis.The resonance of fan and rotor has relation with the component of reference axis of rotating magnetic field of spending the synthetic generation of 3 phases that (2 π/3) phase places are different by every 120 of motor.Thereby, not the voltage of each phase of 3 phase motors (motor), but the dq coordinate system of taking to be transformed to rotating coordinate system reduces the countermeasure of resonance sound, be appropriate.

Generally, in vector control, as (numerical expression 1), provide the voltage instruction under dq coordinate.

[numerical expression 1]

$\left[\begin{array}{c}{V}_d^{*}\\ V_q^{*}\end{array}\right]=\left[\begin{array}{c}r\·I_d^{*}-{\mathrm{\ω}}_1^{*}\·L_q\·I_q^{*}\\ r\·I_q^{*}+{\mathrm{\ω}}_1^{*}\·L_d\·I_d^{*}+{\mathrm{\ω}}_1^{*}\·K_E\end{array}\right]$

Here, r is motor phase resistance, ω ₁ ^*for instruction angular speed, L _d, L _qinductance, I for d axle and q axle _d ^*, I _q ^*instruction current, K for d axle and q axle _efor induced voltage constant.

On the other hand, computing high-order component as (numerical expression 2) is added and is made as new voltage instruction V as (numerical expression 3) _d ^*, V _q ^*.

[numerical expression 2]

$\left[\begin{array}{c}{V}_{\mathrm{dn}}^{*}\\ V_{\mathrm{qn}}^{*}\end{array}\right]={\mathrm{\ω}}_1^{*}\·K_E\left[\begin{array}{c}-G_n\sin (n{\mathrm{\θ}}_d+{\mathrm{\φ}}_n)\\ -G_n\cos (n{\mathrm{\θ}}_d+{\mathrm{\φ}}_n)\end{array}\right]$

[numerical expression 3]

$\left[\begin{array}{c}{V}_d^{**}\\ V_q^{**}\end{array}\right]=\left[\begin{array}{c}{V}_d^{*}\\ V_q^{*}\end{array}\right]+\left[\begin{array}{c}{V}_{\mathrm{dn}}^{*}\\ V_{\mathrm{qn}}^{*}\end{array}\right]$

Here V _dn ^*, V _qn ^*voltage high-order component, G for d axle and q axle _nfor peak factor, the n of n high-order component is high order number of times, θ _dfor d axle phase place, φ _ninitial phase for n high-order component.

The inventor has confirmed optimally to select G by (numerical expression 2) by experiment _nand φ _nand the situation of the n of reduction motor frequency sound doubly.By applying n component of degree n n voltage, can suppress to become the cogging in the generation source of sound, reduce sound.

As shown in Figure 3, the formula of executing the high-order component in alive situation in fixed coordinate system becomes (numerical expression 4).

[numerical expression 4]

$\left[\begin{array}{c}{V}_{\mathrm{Un}}^{*}\\ V_{\mathrm{Vn}}^{*}\\ V_{\mathrm{Wn}}^{*}\end{array}\right]={\mathrm{\ω}}_1^{*}\·K_E\left[\begin{array}{c}-G_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n)\\ -G_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n-\frac{2}{3}\mathrm{\π})\\ -G_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n+\frac{2}{3}\mathrm{\π})\end{array}\right]$

Here V _un ^*, V _vn ^*, V _wn ^*n the voltage high-order component for U, V, W phase.

In addition, (numerical expression 2) is with the ratio G of the amplitude for voltage _nwith the phase difference for component of voltage _nshow, but by change G _nand φ _ncan freely apply high-order component.

130min is then shown ^-1time the reduction example of noise.In the situation that not applying high order voltage, at 312Hz, produced the noise of 35dB.In Fig. 5, be expressed as follows: transverse axis is made as to the initial phase φ of 36 times ₃₆, the longitudinal axis is made as to noise variation value, as the peak factor G of the high-order components of 36 times ₃₆=0.5% makes φ ₃₆from-180[deg] change to 180[deg] situation noise variation value and φ ₃₆=-134[deg] time changed G ₃₆situation under noise variation value.Like this, by being made as φ ₃₆=-134deg, G ₃₆=0.4%, can be by reducing noise 19dB.

The method applying when initial (startup) and last (end) in the situation that applies high-order component is described.

In high-order component generating unit 22, when becoming the rotating speed that applies high-order component by the amplitude of high-order component from 0 amplitude (soft start) that is increased to gradually regulation.For example, in applying 6 component of degree n ns (numerical expression 2), and little by little increase G ₆the coefficient of (for the ratio of voltage fundamental amplitude) is suitable.

In addition, when the amplitude of high-order component being reduced to 0(soft junction bundle gradually from the amplitude of regulation when applying the state of high-order component and become the rotating speed that does not apply high-order component).

Soft start while applying this high-order component by employing, soft junction bundle, the impact while not starting to apply high-order component and while finishing, becomes stable control.

The situation of using Fig. 6 explanation that a plurality of high-order components are combined.Size, the transverse axis of coefficient that the longitudinal axis of Fig. 6 is made as the amplitude of each number of times is made as rotation speed of the fan.If implement as shown in Figure 6 the coefficient of the amplitude of each number of times according to rotation speed of the fan, can be at whole rotating speeds low sound that declines to certain resonance sound.In addition, in the example of Fig. 6, certain number of times in the situation that occurring near certain rotating speed, although under other rotating speed, do not occur, in the situation that having a plurality of resonance point, even also can set with a plurality of rotating speeds under same number.

The inventor has confirmed following situation: about the adequate value of the amplitude of high-order component, take the amplitude (square root sum square of Vd and Vq) of 1 component of degree n n in the situation of benchmark as below 5%, when large, cause sound change greatly when above to it.

According to the 1st execution mode shown in Fig. 1, phase place, amplitude by the high-order component of n time with regulation apply, and can reduce thus the fan of frequency and the resonance sound of rotor of n times of motor frequency.

With Fig. 7～Fig. 9, the 2nd execution mode is described.Illustrated so far and can reduce by executing alive high-order component the situation of sound, the high-order component that still applies electric current also can be realized.

Fig. 7 means the internal structure of controller for motor 11 of the 2nd execution mode of the present invention and the associated figure between this controller for motor 11, DC power supply 12,3 cross streams synchronous motors (suitably slightly " motor " or " 3 phase motor ") 13 and load (fan) 14.

In Fig. 7, the structure of the control device 18 of controller for motor 11 has the feature as the 2nd execution mode.

In addition, DC power supply 12, motor 13, fan 14, inverter 15, DC bus current testing circuit 16 are identical with the 1st execution mode of Fig. 1, and therefore the repetitive description thereof will be omitted.

Control device 18 possesses vector control portion 21, high-order component generating unit 22 and pwm pulse generating unit 24, and vector control portion 21 possesses current-order generating unit 25, current summation portion 26 and voltage instruction operational part and forms.

Current-order generating unit 25 is obtained the information 16A of phase current from DC bus current testing circuit 16, computing motor rotary speed/phase information 25A also exports to high-order component generating unit 22.In addition, instruction current generating unit 25 is also exported to current summation portion 26 by fundamental current instruction 25B.

High-order component generating unit 22 take motor rotary speed/phase information 25A as basis the high-order component 22A of the electric current of permanent magnet synchronous motor 13 is exported to current summation portion 26.

26 pairs of first-harmonics of current summation portion apply high-order component 22A the output current instruction 26A that current-order 25B is added electric current.

Voltage instruction operational part 27 be take current-order 26A and as basis, is carried out computing voltage instruction 27A and export to pwm pulse generating unit 24.

In addition, the explanation of omission and 1 execution mode same structure.

In the 2nd execution mode, in order to reduce noise, take following structure: high-order component generating unit 22 and current summation portion 26 by the electric current shown in below apply high-order component.

Below, with reference to Fig. 8, Fig. 9, the high-order component generating unit 22 of the high-order component 22A that generates electric current and the action to the current summation portion 26 of fundamental current instruction 25B addition by high-order component 22A are described.

In high-order component generating unit 22, use G in predefined (numerical expression 5) described later, (numerical expression 6) and the value of φ, the motor rotary speed/phase information 21A of take generates high-order component as basis, by high-order component 22A to 23 outputs of voltage addition portion.

In voltage addition portion 23, by the first-harmonic of vector control portion 21 output apply voltage instruction 21B, with the high-order component 22A of the voltage of high-order component generating unit 22 outputs, and phase adduction is to 24 outputs of pwm pulse generating unit.

As concrete structure, there are addition in rotating coordinate system and the addition in fixed coordinate system.Then, these methods are described in order.

With reference to Fig. 8, the phase add mode in rotating coordinate system is described.

Fig. 8 means in the 2nd execution mode of the present invention the figure that uses rotating coordinate systems are added method from the high-order component of high-order component generating unit 22 (the high-order component 22A of electric current) to the first-harmonic (fundamental current instruction 25B) of current-order generating unit 25 by current summation portion 26.

In Fig. 8, current-order generating unit 25 is according to the information 16A of phase current, the magnet flow direction (d axle) of motor rotor of take is benchmark, in the dq reference axis of the rotating coordinate system as based on this d axle and right angle orientation (q axle), and output fundamental current instruction 25B(Id ^*, Iq ^*) and motor rotary speed/phase information 25A.In addition Id, ^*be and d axle, Iq ^*fundamental current instruction 25B(Fig. 7 relevant with q axle).

High-order component generating unit 22 generates the high-order component 22A-d(d axle in dq reference axis according to the motor rotary speed/phase information 25A from current-order generating unit 25), 22A-q(q axle).In addition, high-order component 22A-d, 22A-q are suitable with high-order component 22A in Fig. 7.

Current summation portion 26 at d axle by fundamental current instruction (Id ^*) with the current-order 23A-d of high-order component 22A-d phase adduction output d axle.

In addition, current summation portion 23 at q axle by fundamental current instruction (Iq ^*) with high-order component 22A-q phase adduction output q axle apply current-order 23A-q.

In addition, apply current-order 23A-d, 23A-q and by not shown transformation component, be transformed to the component of U phase, V phase, W phase, and be input to pwm pulse generating unit 24(Fig. 7).

In addition, with reference to Fig. 9, the phase add mode in fixed coordinate system is described.

Fig. 9 means in the 2nd execution mode of the present invention the figure that uses fixed coordinate systems are added method from the high-order component of high-order component generating unit 22 (the high-order component 22A of electric current) to the first-harmonic (fundamental current instruction 25B) of current-order generating unit 25 by current summation portion 26.

In Fig. 9, current-order generating unit 25 is exported the fundamental current instruction 25B(Iu of the three-phase alternating current of fixed coordinate system according to the information 16A of phase current ^*, Iv ^*, Iw ^*) and motor rotary speed/phase information 25A.

High-order component generating unit 22 is according to generate high-order component 22A-U, 22A-V, the 22A-W of each phase from the motor rotary speed/phase information 25A of current-order generating unit 25.

The first-harmonic that current summation portion 26 is added the three-phase alternating current of fixed coordinate system for each phase (U, V, W) applies voltage instruction 25B(Iu ^*, Iv ^*, Iw ^*) and high-order component 22A-U, 22A-V, 22A-W, and output applies voltage instruction 23A-U, 23A-V, 23A-W respectively.

Then the n that, motor rotary speed is described doubly descends the fan 14 of generation and the reduction method of the resonance sound of rotor (rotor of motor 13).

Based on fan 14 and the resonance of rotor (13), take the vibration of direction of rotation is cause, and the voltage of each phase of motor or electric current are different with reference axis.Resonance based on fan and rotor with according to every 120 degree (2 π/3) of motor and the component of the reference axis of the synthetic rotating magnetic field producing of different 3 phases of phase place is relevant.Thereby, take not to be with the voltage of each phase of 3 phase motors (motor) but the dq coordinate system that is transformed to rotating coordinate system reduces the countermeasure of resonance sound is appropriate.

Generally, in vector control, the voltage instruction of dq coordinate provides as (numerical expression 1).

For the reduction of resonance sound, can and be added to the I of the dq axle of (numerical expression 1) by the high-order component with (numerical expression 5) definition electric current _d ^*, I _q ^*realize.

[numerical expression 5]

$\left[\begin{array}{c}{I}_{\mathrm{dn}}^{*}\\ I_{\mathrm{dn}}^{*}\end{array}\right]=I_M\left[\begin{array}{c}{G}_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n)\\ G_n\cos ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n)\end{array}\right]$

In addition, also can be with Iu ^*, Iv ^*, Iw ^*be added.High primary current is in this case as shown in (numerical expression 6).

[numerical expression 6]

$\left[\begin{array}{c}{I}_{\mathrm{Un}}^{*}\\ I_{\mathrm{Vn}}^{*}\\ I_{\mathrm{Wn}}^{*}\end{array}\right]=I_M\left[\begin{array}{c}{G}_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n)\\ G_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n-\frac{2}{3}\mathrm{\π})\\ G_n\sin ({\mathrm{n\θ}}_d+{\mathrm{\φ}}_n+\frac{2}{3}\mathrm{\π})\end{array}\right]$

According to the 1st execution mode shown in Fig. 7, by the phase place with regulation, the high-order component that amplitude applies n time, can reduce the fan of frequency and the resonance sound of rotor of n times of motor frequency.

The controller for motor of the 3rd execution mode of the present invention is described with reference to Figure 10～Figure 14.The 3rd execution mode possess high-order component generating unit 22 and the voltage addition portion 23 of the 1st execution mode and switch the modulation system that the PWM of 3 cross streams motors described later controls control the two.

Known generally for high efficiency, reduce sound, reduce electrical noise and switch modulation mode.

In addition, comprise fixedly phase described later 60 degree switching modes and fixing 120 degree switching modes mutually, by the electrical degree in regulation, fix the current potential of 1 phase and the mode of modulating other 2 phases is called and fixes 2 modulation mutually.

Fixedly phase 60 degree switching modes and fixing 120 degree switching modes mutually as the control method of controller for motor first, are first described.And, the impact of this control mode on sound is described afterwards, illustrate with high order voltage and apply and control the control of combining.

The modulation system that PWM in controller for motor controls is described here.

It is 3 modulation (3 phase modulation system) mutually that the PWM of 3 general cross streams motors controls, but has following method: in the situation that 3 cross streams motors are Y wiring, utilize phase voltage different from voltage between phases and with 2, modulate mutually (2 phase modulation system) and carry out.

; the method is as follows: utilizing motor current is not by phase voltage but situation about being determined by voltage between phases; guarantee voltage between phases; and each phase voltage is connected all the time to the switch element of inverter for each specified time limit, thus for every 1 with electrical degree π/3(60 degree, 60 °) be fixed as successively the switching loss that high-order power level or low level power level reduce inverter.

In addition, in the method, as described above regulation interval in 1 by current potential fix, only have other 2 mutually modulated (PWM controls).And, this by current potential the phase of fixing repeat in order.Thereby, though which time modulated all only have 2 phases, be therefore called 2 modulation mutually.

Below, 2 described phase modulation systems are called to fixing 60 degree switching modes mutually.

Then, Figure 11 is shown in the fixing voltage waveform (voltage instruction) of 60 degree switching modes mutually, and which is described.

Figure 11 means the figure as the voltage waveform (voltage instruction) of the U phase in the fixedly phase 60 degree switching modes of 2 phase modulation systems, V phase, W phase.

In addition, Figure 10 is the figure that the voltage waveform (voltage instruction) of U phase in 3 general phase modulation systems, V phase, W phase is shown as a reference.

In Figure 11 and Figure 10, transverse axis represent electrical degree angle [°], the longitudinal axis represent the voltage of each electrical degree to the ratio of maximum voltage, be duty ratio [%].

In Figure 11, W electrical degree be 0 degree (with [and °] quite) be fixed as the voltage of the lower limit of duty ratio 0% in～60 degree.

In 0 degree～60 degree of voltage range that as this W are mutually duty ratio 0%, U phase forms following voltage waveform mutually with V: by the identical relation of situation of 3 phase modulation systems shown in the voltage difference with W phase, phase preserving and Figure 10.That is, in 0 degree～60 degree, W be duty ratio 0% mutually, so U phase and V layer position are than the original magnitude of voltage value of reduction slightly.

In addition, in 60 degree～120 degree, U fixes the voltage into the upper limit of duty ratio 100%.In this interval, V phase forms following voltage waveform mutually with W,, with the relation that the situations of modulation are identical mutually of 3 shown in voltage difference, phase preserving and Figure 10 of U phase, therefore becomes the value slightly raising than original magnitude of voltage.In addition, become mutually 60 degree of duty ratio 100% at U, V phase and W phase voltage sharply rise quickly.

In addition, in 120 degree～180 degree, V fixes the voltage into the lower limit of duty ratio 0%.In this interval, W phase forms following voltage waveform mutually with U: the relation identical with the situation of 3 phase modulation systems shown in voltage difference, phase preserving and Figure 10 of V phase, therefore becomes the value slightly reducing than original magnitude of voltage.In addition, become mutually 120 degree of duty ratio 0% at V, the voltage of W phase and U phase sharply declines quickly.

Repeat to control the action waveforms of the U phase make to become as described above, V phase, W phase.

As shown in figure 11, the voltage between phases of U phase, V phase, W phase is the waveform different from sine wave, but the voltage between lines of the voltage between lines of the voltage between lines of U phase-V phase, V phase-W phase, W phase-U phase becomes respectively sinusoidal waveform, motor 13(Figure 14 therefore being driven by the voltage between lines of 3 phases) and fan 14(Figure 14) move and make the situation with 3 phase modulation systems shown in Figure 10 identical.

Yet W spends in 0 degree～60, U spends in 60 degree～120, W is respectively fixing at 120 degree～180 degree, therefore can reduce the action frequency of the PWM control of inverter 15.Thereby, the low power consumption of inverter 15 is produced effect.

In addition, in whole intervals that repeat 0 degree～360 degree and its, fixed U phase, V phase, the W a certain phase in mutually, modulation be remaining 2 phases.Thereby, be 2 modulation mutually as described above.

In addition, in the 110th, 111,125 pages of the distribution of electric association of civic organization's " half Guide body Electricity power become Change loop (semiconductor power translation circuit) " in March, 1987 etc., disclose and above identical or similar technology.

Then the fixed interval that, every 1 phase is described is than 120 degree switching modes mutually described fixedly phase 60 degree switching modes length, fixing.

In addition, in fixing 120 degree switching modes mutually, have and spend these two kinds of switching modes by fixedly fixing for the upper fixedly phase 120 degree switching modes of the high potential of direct voltage with by the lower fixedly phase 120 fixedly fixing as the electronegative potential of direct voltage.Then, the upper fixing phase 120 of explanation is spent switching modes and lower fixedly phase 120 degree switching modes in order.

Figure 12 means the figure as the voltage waveform (voltage instruction) of the U phase in the upper fixedly phase 120 degree switching modes of 2 phase modulation systems, V phase, W phase.In addition, transverse axis represent electrical degree angle [°], the longitudinal axis represents the duty ratio [%] of voltage.

In Figure 12, U 30 degree (with [and °] quite)～150 degree are fixed as the voltage of the upper limit of duty ratio 100%.

In addition, W is fixed as the voltage of the upper limit of duty ratio 100% at 150 degree～270 degree.

In addition, V is fixed as the voltage of the upper limit of duty ratio 100% at 270 degree～(390) degree.

As described above, U phase, V phase, W mutually all respectively for every 1 at electrical degree 2 π/3(120 degree) between be fixed as high-order power level.

In addition, 1 interval being fixed mutually separately of U phase, V phase, W phase is controlled as forming following voltage waveform: the relation that other is identical with the situation of 3 phase modulation systems shown in voltage difference, phase preserving and Figure 10 of described phase.

Thereby, U phase, V phase, W can be made as to Y wiring mutually and drive 3 cross streams motors with voltage between lines separately.

Figure 13 means the figure as the voltage waveform (voltage instruction) of the U phase in the lower fixedly phase 120 degree switching modes of 2 phase modulation systems, V phase, W phase.In addition, transverse axis represent electrical degree angle [°], the longitudinal axis represents the duty ratio [%] of voltage.

In Figure 13, V 90 degree (with [and °] quite)～210 degree are fixed as the voltage of the lower limit of duty ratio 0%.

In addition, U is fixed as the voltage of the lower limit of duty ratio 0% at 210 degree～330 degree.

In addition, W, at 330 degree～(450) degree, is fixed as the voltage of the lower limit of duty ratio 0% in addition at (30) degree～90 degree.

As described above, U phase, V phase, W mutually all respectively for every 1 at electrical degree 2 π/3(120 degree) between be fixed as low potential power source level.

In addition, 1 interval being fixed mutually separately of U phase, V phase, W phase becomes following voltage waveform: the relation that other is identical with the situation of 3 phase modulation systems shown in voltage difference, phase preserving and Figure 10 of described phase.

Thereby, U phase, V phase, W can be made as to Y wiring mutually, with voltage between lines separately, drive 3 phase motors.

As described above, upper fixing 120 degree switching modes mutually and lower fixedly phase 120 degree switching modes all for every 1 with electrical degree 2 π/3(120 degree, 120 °) be fixed as successively high-order power level or low level power level, so can reduce the switching loss of inverter.

In addition, when the amplitude of phase voltage becomes lower than the magnitude of voltage of regulation, produce in the situation of the inappropriate situation of control shown in Figure 12, Figure 13, stop in addition 2 phase modulation systems and to motor, apply the method for 3 phase voltages by 3 phase modulation systems.

In addition, in patent documentation 2, disclose and above identical or similar technology.

Variation in voltage is because the change of modulation system changes.For example in 60 ° of switching modes of fixedly phase of 2 phase modulation systems, the discontinuity point of voltage occurs 6 times in 1 rotation, so 6 doubly several is had to impact.For example in the situation that being made as 120 ° of switching modes of lower fixedly phase discontinuity point in Figure 13, occur 90,210,330 ° these 3 times, therefore on 3 doubly have for several times an impact.These explanations seem contradiction with the above-mentioned explanation that the change of modulation system can not have influence on voltage between lines, but the error of modulation system is that relatively to apply 1 amplitude of voltage be the error below several %, therefore may measure hardly, causes that sound is had to impact.

Thereby in the situation that modulation system changes, by phase n and amplitude Gn additive correction value, even if changing, modulation system also can obtain identical sound reduction effect.

Then, the structure that reduces the controller for motor of sound in modulation system switching controls is described.

Figure 14 means the internal structure of controller for motor 11 of the 3rd execution mode of the present invention and the associated figure between this controller for motor 11, DC power supply 12, motor (3 phase motor) 13 and fan 14.

In Figure 14, the structure of the control device 20 of controller for motor 11 has the feature as the 3rd execution mode.

In addition, identical with the 1st execution mode of Fig. 1 about DC power supply 12, motor 13, fan 14, inverter 15, DC bus current testing circuit 16, therefore the repetitive description thereof will be omitted.

Control device 20 be configured to possess vector control portion 21, pwm pulse generating unit 24, high-order component generating unit 22, voltage addition portion 23, high-order component correction unit 28 and modulation system selection portion 29.

Vector control portion 21 obtains the information 16A of phase current from DC bus current testing circuit 16, computing motor rotary speed/phase information 21A also exports to high-order component generating unit 22 and modulation system selection portion 29.In addition, vector control portion 21 also applies voltage instruction 21B to voltage addition portion 23 output first-harmonics.

High-order component generating unit 22 generates high-order component 22A according to motor rotary speed/phase information 21A, and exports to high order voltage correction portion 28.

Fixedly phase 60 degree (or 120 degree) switching mode, or 3 phase modulation systems that modulation system selection portion 29 is selected 2 phase modulation systems according to motor rotary speed/phase information 21A, select signal 25A to export to pwm pulse generating unit 24 and high-order component correction unit 28 modulation system.

High order voltage correction portion 28 proofreaies and correct high-order component and exports to voltage addition portion 23 as high-order component 26A after proofreading and correct according to modulation system information 25A and high-order component 22A.

Voltage addition portion 23 applies by first-harmonic that voltage instruction 21B and high-order component 22A are added and output applies voltage instruction 23A.Pwm pulse generating unit 24 selects signal 25A to generate pwm pulse information 20A according to applying voltage instruction 23A and modulation system.

By above structure, in the fixedly phase 60 degree switching modes of 2 phase modulation systems, fixing 120 degree switching modes mutually, by applying voltage high-order component, reduce the resonance sound of fan and rotor.

Thereby the 3rd execution mode has high efficiency, the reduction of sound, the effect of the reduction of electrical noise that the change by modulation system brings, and there is the effect of the resonance sound that reduces fan and rotor.

Above the 3rd execution mode has illustrated the situation of phase making alive high-order component, but also can expect the effect same with the mode of phase making alive high-order component in the mode that is added electric current high-order component.

The controller for motor of the 4th execution mode of the present invention is described.The 4th execution mode possesses high-order component correction unit 28 and the modulation system selection portion 29 of the high-order component generating unit 22 of the 2nd execution mode and current summation portion 26, the 3rd execution mode.Implementation method is that the high order voltage of the 3rd execution mode is replaced into high primary current.

Then, the 5th execution mode is described.In the present embodiment, the controller for motor 11 illustrating in the 1st execution mode～3rd execution mode is applied to the controller for motor 108 of fan of the off-premises station 101 of air conditioner 100.

Figure 15 means the figure of structure example of the air conditioner 100 of the 5th execution mode of the present invention.In Figure 15, air conditioner 100 be configured to possess with open-air carry out heat exchange off-premises station 101, with the indoor indoor set 102 of heat exchange and the pipe arrangement 103 that both are coupled together of carrying out.

Off-premises station 101 be configured to possess compressed refrigerant compressor 104, carry out the heat exchanger 105 of heat exchange with open-air, to the outdoor fan 106 of this heat exchanger 105 air-supplies, make the outdoor fan motor 107 that this outdoor fan 106 is rotated and the controller for motor 108 that drives this outdoor fan motor 107.In addition, the controller for motor 11 of the 1st execution mode～4th execution mode in controller for motor 108 described in application, outdoor fan motor 107 is suitable with 3 phase motors 13, and outdoor fan 106 is suitable with load 14.

In addition, indoor set 102 is configured to and possesses with the indoor heat exchanger 109 that carries out heat exchange and to the forced draft fan 110 of indoor air-supply.

In the 5th execution mode, as described above the controller for motor 11 of the 1st execution mode～4th execution mode is applied to air conditioner 100.That is,, in the control device (17,18,20) of control inverter 15, by applying high-order component or selecting modulation mode, reduce the fan 14 of high secondary frequencies and the resonance sound of rotor (motor 13) of motor rotary speed.

According to the 4th execution mode, do not use the vibration-proof rubber of the rotor portions of outdoor fan motor 107, the vibration-proof rubber of fan portion also can reduce sound, therefore can make at an easy rate quiet air conditioner 100.

With reference to accompanying drawing in detail embodiments of the present invention have been described in detail above, but have the invention is not restricted to these execution modes and distortion thereof, also can in the scope that does not exceed spirit of the present invention, carry out design alteration etc., enumerated its example below.

Each structure of described present embodiment, function, handling part, processing unit etc. also can be by they part or all by such as designing with integrated circuit etc. and realized by hardware.In addition, also can realize by software that can programing change.In addition, also hardware and software can be loaded in mixture.

In addition, control line, information wire represent to think and on product, not necessarily whole control lines, information wire must be shown by needs in explanation.Also can think that in fact most structure is connected to each other.

A part for the structure of an execution mode can be replaced with to the structure of other execution mode, also can in the structure of an execution mode, add the structure of other execution mode in addition.In addition, can carry out the appending/delete of other structure/replace to a part for the structure of each execution mode.

In addition, in order to describe clearly, mainly illustrated as load and the situation of drive fan, but the present invention is effective to take the reduction of the sound that structural resonance frequency is cause, as load, is not limited to fan.

Phase current information based on DC bus current testing circuit 16 obtain general modes such as can using No. 2004-48886 disclosed mode of TOHKEMY non-limiting detection mode.

Vector control portion 21 can be used described " examining (using at a high speed the discussion of the new vector control mode of permanent magnet synchronous motor) by the imperial mode of the new ベ Network of permanet magnet モ same period ー タ ト Le system at a high speed " electricity opinion D, Vol.129(2009) No.1pp.36-45 ", " " Jia Electricity Machine device is to the easy ベ Network of け position セ Application サ レ ス permanet magnet モ same period ー タ Jane ト Le system imperial (the simple vector control of the position-sensor-free permanent magnet synchronous motor of object appliance equipment) " electricity opinion D, Vol.124(2004) No.11pp.1133-1140 " in the general vector control such as mode that propose realize, and non-limiting control mode.

In addition, as the switch element of power converter main circuit 51 and used IGBT, but both can use the switch element of other semiconductor element, for example, can be also MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor: mos field effect transistor).In addition, as the composition of element, can be also to have used SiC(Silicon Carbide, carborundum), GaN(Gallium Nitride, gallium nitride) semiconductor element.

Illustrated high-order component applied to G(in formula for the ratio of the higher-order wave amplitude of voltage fundamental amplitude) and φ (phase difference of fundametal compoment and high-order component) use the situation of the value of setting originally, but also has following method: with the Information base of DC bus current testing circuit 16, in vector control portion 21, according to situation, suitably change G and φ carries out optimum control.

The major function of the gate drivers 52 in Fig. 1 is to improve the driving force of the signal of pwm pulse generating unit 24, if therefore the efferent of pwm pulse generating unit 24 has the function of sufficient driving force or gate drivers 52 to be built in pwm pulse generating unit 24, inverter 15 also can not possess gate drivers 52.

Claims (8)

1. a controller for motor, is characterized in that, possesses:

Inverter, is connected in DC power supply, the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, and motor is driven to control;

Vector control portion, the voltage that computing applies to the described motor that load is rotated to driving;

High-order component generating unit, the high-order component of executing alive first-harmonic of vector control portion described in computing;

Voltage addition portion, the voltage that applies calculating to described vector control portion is added the high-order component that described high-order component generating unit calculates; And

Pwm pulse generating unit, carries out pulse width control according to the signal of this voltage addition portion to described inverter,

The resonance sound producing for the resonance by described motor and its load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency, described voltage addition portion is added to described high-order component to apply voltage.

2. a controller for motor, is characterized in that, possesses:

Inverter, is connected in DC power supply, the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, and motor is driven to control;

Instruction current operational part, the electric current of described motor is flow through in computing;

High-order component generating unit, computing is as the high-order component of the first-harmonic of the instruction current of the output of described instruction current operational part;

Current summation portion, is added to described instruction current the described high-order component that described high-order component generating unit calculates;

Vector control portion, is applied to the voltage of described motor according to the output computing of described current summation portion; And

Pwm pulse generating unit, carries out pulse width control according to the signal of described vector control portion to described inverter,

The resonance sound producing for the resonance by described motor and its load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency, described current summation portion is added to instruction current by described high-order component.

3. a controller for motor, is characterized in that, possesses:

Inverter, is connected in DC power supply, the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, and motor is driven to control;

Vector control portion, the voltage that computing applies to the described motor that load is rotated to driving;

High-order component generating unit, the high-order component of executing alive first-harmonic of vector control portion described in computing;

Pwm pulse generating unit, has and comprises a plurality of modulation systems of fixing 2 phase modulation systems, according to the signal of described voltage addition portion, described inverter is carried out to pulse width control;

High-order component correction unit, corresponding with a plurality of modulation systems and proofread and correct described high-order component; And

Voltage addition portion, the voltage that applies calculating to described vector control portion is added the high-order component that described high-order component correction unit calculates,

The resonance sound producing for the resonance by described motor and its load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency, described voltage addition portion is added to the described high-order component that described high-order component has been carried out to proofread and correct to apply voltage.

4. a controller for motor, is characterized in that, possesses:

Inverter, is connected in DC power supply, the direct current power of this DC power supply is transformed to the alternating electromotive force of variable voltage variable frequency, and motor is driven to control;

Instruction current operational part, the electric current of described motor is flow through in computing;

High-order component generating unit, computing is as the high-order component of the first-harmonic of the instruction current of the output of described instruction current operational part;

High-order component correction unit, corresponding with a plurality of modulation systems and proofread and correct described high-order component;

Current summation portion, is added described high-order component correction unit to described instruction current and has carried out the described high-order component of proofreading and correct;

Vector control portion, is applied to the voltage of described motor according to the output computing of described current summation portion; And

Pwm pulse generating unit, has and comprises a plurality of modulation systems of fixing 2 phase modulation systems, according to the signal of described vector control portion, described inverter is carried out to pulse width control,

The resonance sound producing for the resonance by described motor and its load, the high-order component of the number of times that the computing of described high-order component generating unit represents with the resonance frequency of described resonance sound and the ratio of motor frequency,

The described high-order component that described current summation portion has carried out described high-order component correction unit to proofread and correct according to modulation system is added to described instruction current.

5. controller for motor according to claim 1, is characterized in that,

The amplitude of described high-order component is below 5% of described base wave amplitude.

6. according to the controller for motor described in any one in claim 1～5, it is characterized in that,

Described high-order component is 3m time of first-harmonic, m=1 wherein, and 2,3 ...

7. controller for motor according to claim 1, is characterized in that,

The load of described motor is fan.

8. an air conditioner, is characterized in that,

Loaded controller for motor claimed in claim 1.