CN102255588B - Variable-frequency speed regulating device - Google Patents
Variable-frequency speed regulating device Download PDFInfo
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- CN102255588B CN102255588B CN2011101937925A CN201110193792A CN102255588B CN 102255588 B CN102255588 B CN 102255588B CN 2011101937925 A CN2011101937925 A CN 2011101937925A CN 201110193792 A CN201110193792 A CN 201110193792A CN 102255588 B CN102255588 B CN 102255588B
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Abstract
The invention relates to a variable-frequency speed regulating device, which is applied to a brushless double-fed motor and comprises a rectifying unit, an inverting unit, a first current detection unit, a second current detection unit and a controller, wherein the input end of the rectifying unit is connected with a low-voltage alternating-current power supply; at least one input end of the inverting unit is connected with the output end of the rectifying unit, and the output end of the inverting unit is connected with a control winding; the first current detection unit is used for detectingthree-phase current of a power winding; the second current detection unit is used for detecting three-phase current of a control winding; one of the input ends of the controller is connected with thefirst current detection unit, and the other input end of the controller is connected with the second current detection unit; and one of the output ends of the controller is connected with at least the other input end of the inverting unit. By adopting the variable-frequency speed regulating device, variable-frequency speed regulating of the brushless double-fed motor can be realized.
Description
Technical field
The present invention relates to motor technology, particularly relate to a kind of RHVC.
Background technology
At present, the frequency control of high-voltage motor is controlled high-tension motor with high voltage converter usually.For the security reliability of whole governing system, the capacity of common employed high voltage converter is greater than the rated capacity of high-voltage motor.So just caused the high voltage converter cost high, volume is large, and control system is complicated, the Operation and Maintenance difficulty, and this has seriously hindered applying of it.
Summary of the invention
Consider the problems referred to above, one object of the present invention is to provide a kind of RHVC, and this RHVC can realize the frequency control to brushless dual-feed motor.
The embodiment of the invention provides a kind of RHVC, is used for brushless dual-feed motor, and the stator winding of described brushless dual-feed motor comprises control winding and power winding, it is characterized in that, described RHVC comprises:
Rectification unit, its input is connected with low-voltage alternating current power supply;
Inversion unit, at least one in its input is connected with the output of rectification unit, and its output is connected with described control winding;
The first current detecting unit is used for the three-phase current of described power winding is detected;
The second current detecting unit is used for the three-phase current of described control winding is detected;
Controller, in its input one is connected with described the first current detecting unit, in its input another is connected with described the second current detecting unit, in in its output one input with described inversion unit another is connected at least, be used for according to set-point, fundametal compoment and harmonic component that the three-phase current of the three-phase current of the described power winding that detects and described control winding is separated into are separately controlled respectively, to obtain to the control signal of described inversion unit output.
Utilize the frequency conversion debugging apparatus of the embodiment of the invention, by fundametal compoment and the harmonic component of power winding current and control winding current are controlled respectively, can overcome the defective of the fluctuation of service that brushless dual-feed motor causes by harmonic wave in when operation, realize the stable operation of brushless dual-feed motor under different loads and rotating speed.
Description of drawings
Further feature of the present invention, characteristics, advantage and benefit will become more apparent by the detailed description below in conjunction with accompanying drawing.Wherein:
Fig. 1 shows according to an embodiment of the invention motor variable-frequency speed-regulating system;
Fig. 2 shows at the schematic flow sheet of method for controlling frequency conversion according to an embodiment of the invention;
Fig. 3 shows the separation schematic diagram of control winding three-phase electric current of an instantiation of method for controlling frequency conversion of the present invention;
Fig. 4 shows the separation schematic diagram of power winding three-phase electric current of an instantiation of method for controlling frequency conversion of the present invention;
Fig. 5 shows the vector control block diagram in the instantiation of method for controlling frequency conversion of the present invention;
Fig. 6 shows the controller of one embodiment of the invention.
Embodiment
Below, describe each embodiment of the present invention in detail in connection with accompanying drawing.
Fig. 1 shows according to an embodiment of the invention motor variable-frequency speed-regulating system.As shown in Figure 1, the motor variable-frequency speed-regulating system of this embodiment comprises: motor and RHVC.Wherein, in the governing system of this embodiment, motor comprises the first stator winding and the second stator winding, wherein the first stator winding (being power winding or high pressure winding) has the first winding number of pole-pairs G, be used for connecing high-voltage ac power such as high-voltage fence, wherein the second stator winding (namely controlling winding or low pressure winding) has the second winding number of pole-pairs D, is used for connecing low-voltage variable-frequency speed-regulating.Motor also comprises rotor, and its rotor winding adopts heterogeneous winding-type winding.In one example, the number of phases m of rotor winding satisfies following relational expression;
m＝(G+D)/m
k，
In the formula, when G+D is odd number, m
k=1, when G+D is even number, m
k=2.
According in the alternating current machine about the theory of winding " slot ripples " magnetomotive force aspect, for said motor, at high pressure winding access high pressure power frequency AC, during low pressure winding access variable frequency power supply, the rotor winding can produce G and two kinds of number of pole-pairs rotating mmfs of D simultaneously, and high pressure winding magnetomotive force rotating speed is:
N=60 * f
g/ G, wherein, f
gBe the high-voltage alternating power frequency;
The magnetomotive force rotating speed of low pressure winding is:
N=60 * f
d/ D, wherein f
dFundamental frequency for variable frequency power supply;
And these two kinds of magnetomotive direction of rotation are opposite, and under two kinds of rotating mmf effects, rotor speed is:
n＝60×(f
g±f
d)/(G+D)，
Thereby, can realize frequency control to motor by the variable frequency control to the low pressure winding.
Exemplarily, said motor is brushless dual-feed motor.
The RHVC that among this embodiment, is connected with motor, motor is carried out frequency control comprises: rectification unit 110, and its input is connected with low-voltage alternating current power supply such as low voltage electric network by input contactor 120; Inversion unit 130, comprise a plurality of inputs, in its input at least one is connected with the output of rectification unit, and its output is connected with the second stator winding (control winding), and it receives the DC power supply of rectification unit output and the control signal of controller 160 outputs; The first current detecting unit 140, be used for the three-phase current of the first stator winding (power winding) is detected, its input is namely controlled winding with the second stator winding and is connected, as shown in Figure 1, second stator winding that can be connected in realization electrical network and motor is namely controlled between the winding, and its output is connected with controller 160; The second current detecting unit 150, be used for the three-phase current of the second stator winding is detected, its input is connected with the second stator winding, as shown in Figure 1, second stator winding that can be connected in realization inversion unit and motor is namely controlled between the winding, and its output is connected with controller 160; Controller 160, have a plurality of inputs and a plurality of output, in its input one is connected with described the first current detecting unit, the three-phase current that is used for first stator winding that detects of reception the first current detecting unit output, in its input another is connected with described the second current detecting unit, the three-phase current that is used for second stator winding that detects of reception the second current detecting unit output, in in the output of controller 160 one input with described inversion unit another is connected at least, so that frequency change control signal is inputted inversion unit, in order to motor is carried out frequency control; The first contactor 170, different inputs in its a plurality of inputs are connected with in the output of high-voltage ac power and described controller another respectively, its output is connected with described the first stator winding, is used for according to the signal of controller output the power on/off of power winding being controlled.
Such as Fig. 1, the motor variable-frequency speed-regulating system of this embodiment can also comprise: encoder 180, directly link to each other with the axle of described brushless dual-feed motor, and be used for to the controller output information relevant with the position of the rotor of described brushless dual-feed motor.The information of utilizing encoder to export can be determined the rotating speed of rotor, and rotor magnetomotive force phase angle.Particularly, encoder can be installed on the axle of motor.
Such as Fig. 1, exemplarily, the motor variable-frequency speed-regulating system of this embodiment can also comprise: control panel 190, this control panel 190 is connected with controller 160, is used for receiving operational order and showing current state.Exemplarily, the operator can input corresponding control signal to controller by control panel, as inputs corresponding given signal.
Such as Fig. 1, exemplarily, the motor variable-frequency speed-regulating system of this embodiment also comprises: electric capacity of voltage regulation 181, it is connected in parallel on the output of rectification unit, is used for the output voltage of rectification unit is carried out voltage stabilizing.
For above-mentioned motor such as brushless dual-feed motor with two stator winding, theory according to winding " slot ripples " magnetomotive force aspect, the present inventor finds the harmonic wave of winding in realizing process of the present invention so that there is unsettled defective in motor when operation, in the system of embodiments of the invention, controller 160 is by behind the three-phase current of the three-phase current that receives the first stator winding that detects and the second stator winding, according to set-point, fundametal compoment and harmonic component that the three-phase current of the three-phase current of the first stator winding of detecting and the second stator winding is separated into are separately controlled respectively to obtain can overcome at such motor in the process of operation to the control signal of described inversion unit output, because power winding, the interaction of control winding and rotor winding magnetic field, may exist because the defective of the motor fluctuation of service that the existence of harmonic wave causes has strengthened the stability that motor moves.So that being carried out the frequency conversion debugging, the said motor with two stator winding in the embodiments of the invention becomes possibility.
Among this embodiment, input contactor, rectification unit, electric capacity of voltage regulation, inversion unit absorb energy from low voltage electric network, and for the control winding of motor provides energy, the power winding of motor absorbs energy by the first contactor from high-voltage fence.
Among this embodiment, an example course of work of RHVC comprises: after the input contactor closure, line voltage is converted into direct current by the rectification unit rectification with alternating current; After the voltage stabilizing of direct current process electric capacity of voltage regulation, obtain galvanic current and press; Inversion unit is not in the situation that motor also moves output DC; After guidance panel obtained initiating signal, controller output control signal made the first contactor closed, and then this moment, high-voltage fence voltage directly was added on the power winding of motor, and motor brings into operation; Then, according to the rotational speed setup signal on the guidance panel, change the output voltage of inversion unit by controller, thereby realize the speed governing of motor.
Encoder of the present invention is installed on the brushless double-fed arbor, and is direct-connected with motor shaft, and its output signal is sent into controller, can detect the rotating speed of motor.The first current detecting unit and the second current detecting unit can detect respectively the three-phase current of control winding and power winding by the current Hall transducer, its output signal is sent into controller.
Inversion unit of the present invention is the dc inverter of rectification unit output that three-phase alternating current is supplied with brushless dual-feed motor control winding, the three-phase alternating voltage of output, can be sinusoidal wave, also can be the stack of several sine waves, the amplitude of several voltage to frequencies, frequency can be according to the control command signal intensities of controller.
The RHVC of the embodiment of the invention utilizes its controller according to the three-phase current of the power winding that detects and control winding, fundametal compoment and harmonic component to power winding and control winding current are controlled respectively, can control waveform, amplitude, the frequency of the output voltage of inversion unit, thereby realize the stable operation of brushless dual-feed motor under different loads and rotating speed.
Such as Fig. 2, the method that the controller in the RHVC of the embodiment of the invention carries out variable frequency control comprises the steps:
Step S210 is separated into respectively corresponding fundametal compoment and harmonic component with the electric current of the control winding that detects and the electric current of power winding;
Step S220 according to set-point, controls the fundametal compoment corresponding to electric current of control winding and corresponding fundametal compoment and the harmonic component of electric current of harmonic component and power winding respectively;
Step S230 synthesizes the control output of each fundametal compoment and harmonic component, obtains output control voltage.
In specific implementation, above-mentioned control can be closed-loop control, such as the closed-loop control of proportion of utilization integral controller realization.Those skilled in the art should be understood that the control algolithm that can also use other, such as proportion integration differentiation etc.Exemplarily, can realize above-mentioned control with the control device of realizing corresponding control algolithm.
Particularly, the method for controlling frequency conversion of the embodiment of the invention can be divided into the three-phase current that detects corresponding fundametal compoment and harmonic component as follows:
The amplitude of the fundametal compoment that definite three-phase current that detects is corresponding;
The amplitude of described fundametal compoment be multiply by respectively Sin θ, Sin (θ-120 °), Sin (θ+120 °), the fundametal compoment of the three-phase current that obtains detecting, wherein θ is the number of degrees of the phase angle of a phase three-phase current first-harmonic;
The three-phase current that detects is deducted its fundametal compoment, the harmonic component of the three-phase current that obtains detecting.
Particularly, in the method for controlling frequency conversion of the embodiment of the invention, fundametal compoment corresponding to the three-phase current of fundametal compoment corresponding to the three-phase current of described control winding and harmonic component and described power winding and harmonic component are controlled comprised respectively:
According to coordinate transform angle θ
1Fundametal compoment to the electric current of the first stator winding of detecting is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of the second stator winding of detecting is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of the first stator winding of detecting with according to coordinate transform angle θ
S2The harmonic component of the electric current of the second stator winding that detects is carried out DQ coordinate transform, wherein θ
1Be the phase angle of described the first dynamically potential energy produced in magnetic field of stator winding, described θ
2Be the phase angle of described the second dynamically potential energy produced in magnetic field of stator winding, described θ
S1Be the angle of the phase angle of rotor magnetomotive force phase angle and described the first dynamically potential energy produced in magnetic field of stator winding, described θ
S2Angle for the phase angle of rotor magnetomotive force phase angle and described the second dynamically potential energy produced in magnetic field of stator winding; Wherein, the magnetomotive phase angle of said stator winding is the phase angle of a phase current of corresponding stator winding; Rotor magnetomotive force phase angle can be determined according to the information relevant with rotor-position of encoder output;
According to each fundametal compoment and set-point corresponding to harmonic component, respectively each the D axle component and the Q axle component that carry out exporting after the DQ coordinate transform are controlled.
Particularly, the method for controlling frequency conversion of the embodiment of the invention also comprises:
For each fundametal compoment and harmonic component, Q axle component and the D axle component of controlling rear output carried out the DQ inverse transformation; And
With each mutually respectively addition of each fundametal compoment and the voltage of exporting after harmonic component is carried out the DQ inverse transformation, obtain the corresponding phase of output control voltage.
Below in conjunction with Fig. 3-Fig. 5 an instantiation of the method for controlling frequency conversion of the embodiment of the invention is described.
The control winding current that detects is separated into fundametal compoment and harmonic component, does respectively coordinate transform, with the conversion gained respectively with given comparison, after passing ratio integration (PI) is regulated, again inverse transformation output, the Output rusults addition is the output of controller.
The control winding current at first will be separated into fundametal compoment and harmonic component, with the i that detects
Ca, i
Cb, i
CcBe separated into fundametal compoment i
C1a, i
C1b, i
C1cWith harmonic component i
C2a, i
C2b, i
C2cWith the i that detects
Ca, i
Cb, i
CcTake absolute value respectively, three value summations, then recurrence average is averaged, and this mean value is the mean value of each phase current divided by 3, and mean value multiply by 1.1*1.414 and is amplitude.Use this amplitude to multiply by respectively Sin θ, Sin (θ-120 °), Sin (θ+120 °), just obtained the fundametal compoment i of three-phase current
C1a, i
C1b, i
C1c, with the current i that detects
Ca, i
Cb, i
CcDeduct respectively i
C1a, i
C1b, i
C1c, just obtained three phase harmonic component i
C2a, i
C2b, i
C2cThen make the power winding current i that uses the same method detecting
Pa, i
Pb, i
PcBe separated into fundametal compoment i
P1a, i
P1b, i
P1cWith harmonic component i
P2a, i
P2b, i
P2cWhen determining the amplitude of fundametal compoment, can not use recurrence average yet and just use other average algorithm such as the average algorithm of routine.
Determine that each fundametal compoment and harmonic component carry out the coordinate transform angle that the DQ coordinate transform is used.The coordinate transform angle θ of the fundametal compoment of power winding wherein
1(θ
p) be the magnetomotive phase angle of power winding, the coordinate transform angle θ of the fundametal compoment of control winding
2(θ
c) for controlling the magnetomotive phase angle of winding, the coordinate transform angle θ of the harmonic component of power winding
S1Be the angle of rotor magnetomotive force phase angle and the magnetomotive phase angle of described power winding, the coordinate transform angle θ of the harmonic component of control winding
S2Angle for rotor magnetomotive force phase angle and the magnetomotive phase angle of control winding.
At the fundametal compoment that will control winding and power winding current and harmonic component after separating, and ask for the required angle of coordinate transform, just can carry out vector control.With angle θ
cTo control winding current fundametal compoment i
C1a, i
C1b, i
C1cDo coordinate transform, transform to the DQ axle, obtain i
C1d, i
C1q, these two values are poor with set-point respectively, and behind pi regulator, again inverse transformation output obtains v
C1a, v
C1b, v
C1cIn like manner, with angle θ
S2To control winding current harmonic component i
C2a, i
C2b, i
C2cDo same operation, obtain v
C2a, v
C2b, v
C2cWith angle θ
pTo power winding current fundametal compoment i
P1a, i
P1b, i
P1cDo same operation, obtain v
P1a, v
P1b, v
P1cWith angle θ
S1To power winding current harmonic component i
P2a, i
P2b, i
P2cDo same operation, obtain v
P2a, v
P2b, v
P2cDriving governor a phase output voltage v then
CaBe v
C1a, v
C2a, v
P1a, v
P2aSum; B phase output voltage v
CbBe v
C1b, v
C2b, v
P1b, v
P2bSum; C phase output voltage v
CcBe v
C1c, v
C2c, v
P1c, v
P2cSum.In this example, carry out closed-loop control with pi regulator.
Among Fig. 5, i
* C1q, i
* C1d, i
* C2q, i
* C2d, i
* P1q, i
* P1d, i
* P2q, i
* P2dIt is respectively the given electric current of D axle component corresponding to each fundametal compoment and harmonic component and Q axle component.The set-point of fundametal compoment and harmonic component can preset.
Among Fig. 5,3/2 conversion represents the three-phase of motor coordinate to the DQ conversion of two-phase; 2/3 conversion represents the two-phase of motor coordinate to the DQ inverse transformation of three-phase.
Fig. 6 shows the controller of one embodiment of the invention.This controller 160 comprises: current separation module 610, and the three-phase current that is used for the three-phase current of the first stator winding of will described the first current detecting unit detecting and the second stator winding that described the second current detecting unit detects is separated into respectively fundametal compoment and the harmonic component of correspondence; Control module 620 is used for according to set-point, and fundametal compoment and the harmonic component of the three-phase current of fundametal compoment corresponding to the three-phase current of the first stator winding of detecting and harmonic component and the second stator winding of detecting are controlled respectively; Synthesis module 630 is used for the control output of each fundametal compoment and harmonic component is synthesized, to obtain to the control signal of described inversion unit output.
Better, above-mentioned control module is closed loop control module, is used for carrying out closed-loop control.
Further, in the controller of this embodiment, described current separation module comprises:
The amplitude determination module be used for to be determined the amplitude of the fundametal compoment that the three-phase current that detects is corresponding, and wherein, the electric current that detects is the three-phase current of the three-phase current of the first stator winding of detecting or the second stator winding of detecting;
The first-harmonic determination module, be used for amplitude with determined fundametal compoment and multiply by respectively Sin θ, Sin (θ-120 °), Sin (θ+120 °), the fundametal compoment of the electric current that obtains detecting, wherein θ is the phase angle number of the first-harmonic of a phase current in the three-phase current that detects;
The harmonic wave determination module is used for the three-phase current that detects being deducted its fundametal compoment, the harmonic component of the three-phase current that obtains detecting.
Further, in the controller of this embodiment, described control module comprises: coordinate transformation module is used for according to coordinate transform angle θ
1Fundametal compoment to the electric current of the first stator winding of detecting is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of the second stator winding of detecting is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of the first stator winding of detecting with according to coordinate transform angle θ
S2The harmonic component of the electric current of the second stator winding that detects is carried out DQ coordinate transform, wherein θ
1Be the phase angle of described the first dynamically potential energy produced in magnetic field of stator winding, described θ
2Be the phase angle of described the second dynamically potential energy produced in magnetic field of stator winding, described θ
S1Be the angle of the phase angle of rotor magnetomotive force phase angle and described the first dynamically potential energy produced in magnetic field of stator winding, described θ
S2Angle for the phase angle of rotor magnetomotive force phase angle and described the second dynamically potential energy produced in magnetic field of stator winding; The DQ control module is used for according to each fundametal compoment and set-point corresponding to harmonic component, respectively each the D axle component and the Q axle component that carry out exporting after the DQ coordinate transform is controlled.
Further, in the controller of this embodiment, also comprise: the coordinate inverse transform block, be used for for each fundametal compoment and harmonic component, D axle component and the Q axle component of controlling rear output carried out the DQ inverse transformation; Described synthesis module is further used for each the mutually respectively addition with each fundametal compoment and the control signal of exporting after harmonic component is carried out the DQ inverse transformation, obtains to the corresponding phase of the control signal of described inversion unit output.
Further, the controller of this embodiment is control voltage to the control signal of described inversion unit output.
Further, in the controller of this embodiment, described control module is the proportional integral adjustment module.Certainly, it can also be other control module, such as modules such as proportion integration differentiation (PID).
It will be appreciated by those skilled in the art that controller 160 can utilize the mode of software, hardware or software and hardware combining to realize.
It will be appreciated by those skilled in the art that each embodiment described above can in the situation that partially invention essence make various changes and distortion, and these changes and distortion all should fall within protection scope of the present invention.Protection scope of the present invention should be limited by appending claims.
Claims (8)
1. a RHVC is used for brushless dual-feed motor, and the stator winding of described brushless dual-feed motor comprises control winding and power winding, it is characterized in that, described RHVC comprises:
Rectification unit, its input is connected with low-voltage alternating current power supply;
Inversion unit, at least one in its input is connected with the output of rectification unit, and its output is connected with described control winding;
The first current detecting unit is used for the three-phase current of described power winding is detected;
The second current detecting unit is used for the three-phase current of described control winding is detected;
Controller, in its input one is connected with described the first current detecting unit, in its input another is connected with described the second current detecting unit, in in its output one input with described inversion unit another is connected at least, be used for according to set-point, fundametal compoment and harmonic component that the three-phase current of the three-phase current of the described power winding that detects and described control winding is separated into are separately controlled respectively, to obtain to the control signal of described inversion unit output;
Wherein, described controller comprises:
The current separation module, the three-phase current that is used for the three-phase current of the power winding that will described the first current detecting unit detects and the control winding that described the second current detecting unit detects is separated into respectively fundametal compoment and the harmonic component of correspondence;
Control module is used for according to set-point, and fundametal compoment and the harmonic component of the three-phase current of fundametal compoment corresponding to the three-phase current of the power winding that detects and harmonic component and the control winding that detects are controlled respectively;
Synthesis module is used for the control output of each fundametal compoment and harmonic component is synthesized, to obtain to the control signal of described inversion unit output;
Wherein, described control module comprises:
Coordinate transformation module is used for according to coordinate transform angle θ
1Fundametal compoment to the electric current of the power winding that detects is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of the control winding that detects is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of the power winding that detects with according to coordinate transform angle θ
S2The harmonic component of the electric current of the control winding that detects is carried out DQ coordinate transform, wherein θ
1Be the magnetomotive phase angle of described power winding, described θ
2Be the magnetomotive phase angle of described control winding, described θ
S1Be the angle of rotor magnetomotive force phase angle and the magnetomotive phase angle of described power winding, described θ
S2Angle for rotor magnetomotive force phase angle and the magnetomotive phase angle of described control winding;
The DQ control module is used for according to each fundametal compoment and set-point corresponding to harmonic component, respectively each the D axle component and the Q axle component that carry out exporting after the DQ coordinate transform is controlled.
2. RHVC according to claim 1 is characterized in that, described motor also comprises rotor, and its rotor winding is heterogeneous winding-type, and the number of phases is m, wherein, and m=(G+D)/m
k, wherein, when G+D is odd number, m
k=1; When G+D is even number, m
k=2;
Wherein, G is the first winding number of pole-pairs that described power winding has; D is the second winding number of pole-pairs that described control winding has.
3. RHVC according to claim 1 is characterized in that, also comprises:
Encoder directly links to each other with the axle of described brushless dual-feed motor, is used for to the controller output information relevant with the position of the rotor of described brushless dual-feed motor.
4. RHVC according to claim 1 is characterized in that, also comprises:
The first contactor, another in the output of its input and high-voltage ac power and described controller is connected, and its output is connected with described power winding.
5. RHVC according to claim 1 is characterized in that, described current separation module comprises:
The amplitude determination module be used for to be determined the amplitude of the fundametal compoment that the three-phase current that detects is corresponding, and wherein, the electric current that detects is the three-phase current of the three-phase current of the power winding that detects or the control winding that detects;
The first-harmonic determination module, be used for amplitude with determined fundametal compoment and multiply by respectively Sin θ, Sin (θ-120 °), Sin (θ+120 °), the fundametal compoment of the electric current that obtains detecting, wherein θ is the phase angle number of the first-harmonic of a phase current in the three-phase current that detects;
The harmonic wave determination module is used for the three-phase current that detects being deducted its fundametal compoment, the harmonic component of the three-phase current that obtains detecting.
6. RHVC according to claim 1 is characterized in that, also comprises:
The coordinate inverse transform block is used for for each fundametal compoment and harmonic component, and D axle component and the Q axle component of controlling rear output carried out the DQ inverse transformation;
Described synthesis module is further used for each the mutually respectively addition with each fundametal compoment and the control signal of exporting after harmonic component is carried out the DQ inverse transformation, obtains to the corresponding phase of the control signal of described inversion unit output.
7. each described RHVC is characterized in that according to claim 1-6, and described controller is control voltage to the control signal of described inversion unit output.
8. each described RHVC is characterized in that according to claim 1-6, and described control module is the proportional integral adjustment module.
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| CN2011101937925A CN102255588B (en) | 2011-07-08 | 2011-07-08 | Variable-frequency speed regulating device |
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|---|---|---|---|
| CN2011101937925A CN102255588B (en) | 2011-07-08 | 2011-07-08 | Variable-frequency speed regulating device |
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| CN102255588B true CN102255588B (en) | 2013-10-16 |
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| CN102244496B (en) * | 2011-07-08 | 2013-09-04 | 大禹电气科技股份有限公司 | Variable frequency speed-adjusting system for motor |
| DE102012212766A1 (en) * | 2012-07-20 | 2014-01-23 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Method for determining the rotor position of an electronically commutated multiphase DC motor |
| CN102868346A (en) * | 2012-08-16 | 2013-01-09 | 北京索德电气工业有限公司 | Brushless doubly-fed motor excitation control system and control method using same |
| CN103138674B (en) * | 2013-03-28 | 2015-11-11 | 北京索德电气工业有限公司 | High-power brushless double-fed motor variable frequency speed control system and control method |
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| CN101510747A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Excitation control system architecture and control method for marine diesel brushless double fed shaft generator |
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| CN202374208U (en) * | 2011-07-08 | 2012-08-08 | 大禹电气科技股份有限公司 | Frequency conversion speed-adjusting device |
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| JP2001119979A (en) * | 1999-10-15 | 2001-04-27 | Yamaha Motor Co Ltd | Current-control device of ac electric motor |
| JP3928575B2 (en) * | 2003-04-07 | 2007-06-13 | 日産自動車株式会社 | Motor control device |
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| CN101510747A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Excitation control system architecture and control method for marine diesel brushless double fed shaft generator |
| CN101764566A (en) * | 2010-01-13 | 2010-06-30 | 南京航空航天大学 | Stator duplex winding asynchronous wind generating system and control method thereof |
| CN101944747A (en) * | 2010-09-15 | 2011-01-12 | 邵诗逸 | Low-voltage failure crossing method of brushless cascading double-fed wind power generator set |
| CN202374208U (en) * | 2011-07-08 | 2012-08-08 | 大禹电气科技股份有限公司 | Frequency conversion speed-adjusting device |
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