CN202111662U - Motor variable-frequency speed governing system - Google Patents
Motor variable-frequency speed governing system Download PDFInfo
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- CN202111662U CN202111662U CN2011202439960U CN201120243996U CN202111662U CN 202111662 U CN202111662 U CN 202111662U CN 2011202439960 U CN2011202439960 U CN 2011202439960U CN 201120243996 U CN201120243996 U CN 201120243996U CN 202111662 U CN202111662 U CN 202111662U
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Abstract
The utility model relates to a motor variable-frequency speed governing system comprising: a motor which comprises: a first stator winding having a first winding pole pair number G and used for connection with a high-voltage alternating-current power source; a second stator winding having a second winding pole pair number G; and a rotor winding; and a variable-frequency speed governing device which comprises: a rectifier unit with an input end connected to a low-voltage alternating-current power source; an inverter unit with an input end connected to the output end of the rectifier unit and an output end connected to the second stator winding; a first current detection unit for detecting the three-phase current of the first stator winding; a second current detection unit for detecting the three-phase current of the second stator winding; and a controller with an input end connected to the first current detection unit and the second current detection unit and an output end connected to the input end of the inverter unit. With the technical scheme, a high-voltage high-power motor can be controlled by using a low-voltage low-power variable-frequency speed governing device.
Description
Technical field
The utility model relates to motor technology, particularly relates to a kind of motor variable-frequency speed-regulating system.
Background technology
At present, the frequency control of high-voltage motor uses high voltage converter to control high-tension motor 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 big, and control system is complicated, the Operation and Maintenance difficulty, and this has seriously hindered applying of it.
The utility model content
Consider the problems referred to above, a purpose of the utility model is to provide a kind of motor variable-frequency speed-regulating system, and it can control high-voltage high-power motor by enough low pressure low power frequency conversion speed regulating device.
The utility model embodiment provides a kind of motor variable-frequency speed-regulating system, it is characterized in that, comprising:
Motor comprises:
First stator winding has the first winding number of pole-pairs G, is used for being connected with high-voltage ac power;
Second stator winding has the second winding number of pole-pairs D;
The rotor winding;
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 said second stator winding;
First current detecting unit is used for the three-phase current of said first stator winding is detected;
Second current detecting unit is used for the three-phase current of said second stator winding is detected;
Controller; In its input one is connected with said first current detecting unit; In its input another is connected with said second current detecting unit; In in its output one input with said inversion unit another is connected at least; Be used for according to set-point, the fundametal compoment harmonic component that the three-phase current of the three-phase current of said first stator winding that detected and said second stator winding is separated into separately controlled respectively, to obtain control signal to said inversion unit output.
Utilize the motor variable-frequency speed-regulating system of the utility model embodiment; First stator winding of motor can directly be supplied power by high-voltage ac power such as high-voltage fence; And second stator winding can be supplied power by RHVC; Can control high-voltage high-power motor by the low power RHVC of enough low pressure like this, practice thrift the energy, the whole efficiency of simultaneity factor will be much higher than traditional frequency converter and electric system thereof.
Description of drawings
The further feature of the utility model, characteristics, advantage and benefit will become more obvious through the detailed description below in conjunction with accompanying drawing.Wherein:
Fig. 1 shows the motor variable-frequency speed-regulating system according to the utility model one embodiment;
Fig. 2 shows the schematic flow sheet according to the method for controlling frequency conversion of the utility model one embodiment;
Fig. 3 shows in an instantiation according to the method for controlling frequency conversion of the utility model embodiment, the separation sketch map of control winding three-phase electric current;
Fig. 4 shows in an instantiation according to the method for controlling frequency conversion of the utility model embodiment, the separation sketch map of power winding three-phase electric current;
Fig. 5 shows in an instantiation according to the method for controlling frequency conversion of the utility model embodiment, the sketch map of vector control;
Fig. 6 shows the controller according to the utility model one embodiment.
Embodiment
Below, with combining accompanying drawing to describe each embodiment of the utility model in detail.
Fig. 1 shows the motor variable-frequency speed-regulating system according to the utility model one embodiment.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 first stator winding and second stator winding, and wherein first stator winding (being power winding or high pressure winding) has the first winding number of pole-pairs G, is used to connect high-voltage ac power such as high-voltage fence; Wherein second stator winding (promptly controlling winding or low pressure winding) has the second winding number of pole-pairs D, is used to connect the low-voltage variable frequency speed regulating device.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 above-mentioned motor; On the high pressure winding, insert the high pressure power frequency AC; When the low pressure winding inserted variable frequency power supply, the rotor winding can produce G and two kinds of number of pole-pairs rotations of D magnetomotive force simultaneously, and high pressure winding magnetomotive force revolution 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 the effect of two kinds of rotation magnetomotive force, rotor speed is:
n＝60×(f
g±f
d)/(G+D)，
Thereby, can realize frequency control to motor through VFC to the low pressure winding.
Exemplarily, above-mentioned motor is a 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 through 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 second stator winding (control winding), and it receives the DC power supply of rectification unit output and the control signal of controller 160 outputs; First current detecting unit 140; Be used for the three-phase current of first stator winding (power winding) is detected; Its input is promptly controlled winding with second stator winding and is connected; As shown in Figure 1, second stator winding that can be connected on electrical network and motor is in realization promptly controlled between the winding, and its output is connected with controller 160; Second current detecting unit 150; Be used for the three-phase current of second stator winding is detected; Its input is connected with second stator winding; As shown in Figure 1, second stator winding that can be connected on inversion unit and motor is in realization promptly 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 said first current detecting unit, is used to receive the three-phase current of first stator winding that is detected of first current detecting unit output, and another in its input is connected with said second current detecting unit; Be used to receive the three-phase current of second stator winding that is detected of second current detecting unit output; In in the output of controller 160 one input with said inversion unit another is connected at least, so that frequency change control signal is imported inversion unit, in order to motor is carried out frequency control; First contactor 170; Different inputs in its a plurality of inputs respectively with the output of high-voltage ac power and said controller in another be connected; Its output is connected with said first stator winding, is used for according to the signal of controller output the break-make electricity of power winding being controlled.
Like 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 said brushless dual-feed motor, and be used for to the position relevant information of controller output with the rotor of said brushless dual-feed motor.The information of utilizing encoder to export can be confirmed the rotating speed of rotor, and rotor magnetomotive force phase angle.Particularly, encoder can be installed on the axle of motor.
Like 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 to receive operational order and shows current state.Exemplarily, the operator can import control signal corresponding to controller through control panel, as imports corresponding given signal.
Like Fig. 1, exemplarily, the motor variable-frequency speed-regulating system of this embodiment also comprises: electric capacity of voltage regulation 181, the output that it is connected in parallel on rectification unit is used for the output voltage of rectification unit is carried out voltage stabilizing.
To above-mentioned motor such as brushless dual-feed motor with two stator winding; Theory according to winding " slot ripples " magnetomotive force aspect; The inventor of the utility model finds that in the process that realizes the utility model the harmonic wave of winding makes motor when operation, have unsettled defective; In the system of the embodiment of the utility model; Behind the three-phase current of three-phase current and second stator winding of controller 160 through first stator winding that detects receiving; According to set-point, the fundametal compoment harmonic component that the three-phase current of the three-phase current of first stator winding that detected and second stator winding is separated into is separately controlled the control signal that obtains to said inversion unit output respectively and can be overcome at such motor in the process of operation, because the interaction in power winding, control winding and rotor winding magnetic field; Possibly exist because the defective of the motor fluctuation of service that the existence of harmonic wave causes has strengthened the stability that motor moves.Make that the above-mentioned motor with two stator winding among the embodiment of the utility model is carried out the frequency conversion debugging 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 through first contactor from high-voltage fence.
Among this embodiment, an example course of work of RHVC comprises: after the input contactor closure, low voltage electric network voltage is converted into direct current through 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 under motor does not also have situation that operation gets up, output DC; After obtaining initiating signal on the guidance panel, controller output control signal makes 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,, change the output voltage of inversion unit, thereby realize the speed governing of motor through controller according to the rotational speed setup signal on the guidance panel.
The utility model encoder 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 rotating speed of motor.First current detecting unit and second current detecting unit can detect the three-phase current of control winding and power winding respectively through the current Hall transducer, its output signal is sent into controller.
The said inversion unit of the utility model 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 change according to the control command signal of controller.
The RHVC of the utility model embodiment utilizes its controller according to the three-phase current of the power winding that is detected with the control winding; The power winding and the fundametal compoment harmonic component of 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.
Like Fig. 2, the method that the controller in the RHVC of the utility model embodiment carries out VFC comprises the steps:
Step S201 separates into corresponding fundametal compoment harmonic component respectively with the electric current of the control winding that is detected and the electric current of power winding;
Step S202 according to set-point, controls the corresponding fundametal compoment harmonic component of the electric current of control winding and the corresponding fundametal compoment harmonic component of electric current of power winding respectively;
Step S203 synthesizes the control output of each fundametal compoment harmonic component, obtains output control voltage.
In concrete the realization, above-mentioned control can be closed-loop control, like 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, like PID etc.Exemplarily, can use the control device of realizing corresponding control algolithm to realize above-mentioned control.
Particularly, the method for controlling frequency conversion of the utility model embodiment can be divided into corresponding fundametal compoment harmonic component with the three-phase current that is detected through following steps:
The amplitude of the fundametal compoment that definite three-phase current that is detected is corresponding;
The amplitude of said fundametal compoment multiply by Sin θ, Sin (θ-120 °), Sin (θ+120 °) respectively, the fundametal compoment of the three-phase current that obtains being detected, wherein θ is the number of degrees of the phase angle of a phase three-phase current first-harmonic;
The three-phase current that is detected is deducted its fundametal compoment, the harmonic component of the three-phase current that obtains being detected.
Particularly, in the method for controlling frequency conversion of the utility model embodiment, the corresponding fundametal compoment harmonic component of three-phase current of corresponding fundametal compoment harmonic component of the three-phase current of said control winding and said power winding is controlled comprised respectively:
According to coordinate transform angle θ
1Fundametal compoment to the electric current of first stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of second stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of first stator winding that detected with according to coordinate transform angle θ
S2The harmonic component of the electric current of second stator winding that is detected is carried out the DQ coordinate transform, wherein θ
1Be the magnetomotive phase angle of said first stator winding, said θ
2Be the magnetomotive phase angle of said second stator winding, said θ
S1Be the angle of rotor magnetomotive force phase angle and the magnetomotive phase angle of said first stator winding, said θ
S2Angle for rotor magnetomotive force phase angle and the magnetomotive phase angle of said second 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 confirmed according to the information relevant with rotor-position of encoder output;
The set-point corresponding according to each fundametal compoment harmonic component controlled each the D axle component and the Q axle component that carry out exporting after the DQ coordinate transform respectively.
Particularly, the method for controlling frequency conversion of the utility model embodiment also comprises:
To each fundametal compoment harmonic component, Q axle component and the P axle component of controlling back output carried out the DQ inverse transformation; And
Each addition respectively mutually of the voltage that each fundametal compoment harmonic component is carried out export after the DQ inverse transformation obtains 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 utility model embodiment is described.
Detected control winding current is separated into fundametal compoment harmonic component, does coordinate transform respectively, with the conversion gained respectively with given comparison, after passing ratio integration (PI) is regulated, inverse transformation output again, the output results added is the output of controller.
The control winding current at first will separate into fundametal compoment harmonic component, with detected i
Ca, i
Cb, i
CcSeparate into fundametal compoment i
C1a, i
C1b, i
C1cHarmonic component i
C2a, i
C2b, i
C2cWith detected i
Ca, i
Cb, i
CcTake absolute value respectively, three value summations, recurrence average is averaged then, 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 Sin θ, Sin (θ-120 °), Sin (θ+120 °) respectively, just obtained the fundametal compoment i of three-phase current
C1a, i
C1b, i
C1c, use detected current i
Ca, i
Cb, i
CcDeduct i respectively
C1a, i
C1b, i
C1c, just obtained three phase harmonic component i
C2a, i
C2b, i
C2C.Make then and use the same method detected power winding current i
Pa, i
Pb, i
PcSeparate into fundametal compoment i
P1a, i
P1b, i
P1cHarmonic component i
P2a, i
P2b, i
P2cWhen confirming the amplitude of fundametal compoment, can not use recurrence average yet and only be to use other the average algorithm such as the average algorithm of routine.
Confirm that each fundametal compoment harmonic component carries 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 said power winding, the coordinate transform angle θ of the harmonic component of control winding
S2Be the angle of rotor magnetomotive force phase angle with the magnetomotive phase angle of control winding.
To control the fundametal compoment harmonic component after separating of winding and power winding current, 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, inverse transformation output again 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, use pi regulator to carry out closed-loop control.
Among Fig. 5, i
* C1q, i
* C1d, i
* C2q, i
* C2d, i
* P1q, i
* P1d, i
* P2q, i
* P2dBe respectively the corresponding D axle component of each fundametal compoment harmonic component and the given electric current of Q axle component.The set-point of fundametal compoment harmonic component can preestablish.
Among Fig. 5, the DQ conversion of the three-phase of motor coordinate to two phases represented in 3/2 conversion; On behalf of two of motor coordinate, 2/3 conversion arrive the DQ inverse transformation of three-phase mutually.
Fig. 6 shows the controller of the utility model one embodiment.This controller 160 comprises: current separation module 610, and the three-phase current of first stator winding that is used for said first current detecting unit is detected and the three-phase current of second stator winding that said second current detecting unit is detected separate into corresponding fundametal compoment harmonic component respectively; Control module 620 is used for according to set-point, and the fundametal compoment harmonic component of the three-phase current of the corresponding fundametal compoment harmonic component of the three-phase current of first stator winding that detected and second stator winding that detected is controlled respectively; Synthesis module 630 is used for the control output of each fundametal compoment harmonic component is synthesized, to obtain the control signal to said inversion unit output.
Preferable, above-mentioned control module is the closed-loop control module, is used to carry out closed-loop control.
Further, in the controller of this embodiment, said current separation module comprises:
The amplitude determination module is used to confirm the amplitude of the fundametal compoment that the three-phase current that detected is corresponding, and wherein, the electric current that is detected is the three-phase current of the three-phase current of first stator winding that detected or second stator winding that detected;
The first-harmonic determination module; Be used for amplitude with determined fundametal compoment and multiply by Sin θ, Sin (θ-120 °), Sin (θ+120 °) respectively; The fundametal compoment of the electric current that obtains being detected, wherein θ is the phase angle number of degrees of the first-harmonic of a phase current in the three-phase current that is detected;
The harmonic wave determination module is used for the three-phase current that is detected is deducted its fundametal compoment, the harmonic component of the three-phase current that obtains being detected.
Further, in the controller of this embodiment, said control module comprises: coordinate transformation module is used for according to coordinate transform angle θ
1Fundametal compoment to the electric current of first stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of second stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of first stator winding that detected with according to coordinate transform angle θ
S2The harmonic component of the electric current of second stator winding that is detected is carried out the DQ coordinate transform, wherein θ
1Be the magnetomotive phase angle of said first stator winding, said θ
2Be the magnetomotive phase angle of said second stator winding, said θ
S1Be the angle of rotor magnetomotive force phase angle and the magnetomotive phase angle of said first stator winding, said θ
S2Angle for rotor magnetomotive force phase angle and the magnetomotive phase angle of said second stator winding; The DQ control module is used for the set-point corresponding according to each fundametal compoment 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 to each fundametal compoment harmonic component, D axle component and the Q axle component of controlling back output carried out the DQ inverse transformation; Each addition respectively mutually of the control signal that said synthesis module is further used for each fundametal compoment harmonic component is carried out exporting after the DQ inverse transformation obtains to the corresponding phase of the control signal of said inversion unit output.
Further, the controller of this embodiment is control voltage to the control signal of said inversion unit output.
Further, in the controller of this embodiment, said control module is the proportional integral adjustment module.Certainly, it can also be other control module, like PID modules such as (PID).
It will be appreciated by those skilled in the art that controller 160 can utilize hardware mode to realize.
It will be appreciated by those skilled in the art that top described each embodiment can partially not make various changes and distortion under the situation of utility model essence, and these changes and distortion should fall within the protection range of the utility model all.The protection range of the utility model should be limited appending claims.
Claims (10)
1. a motor variable-frequency speed-regulating system is characterized in that, comprising:
Motor comprises:
First stator winding has the first winding number of pole-pairs G, is used for being connected with high-voltage ac power;
Second stator winding has the second winding number of pole-pairs D;
The rotor winding;
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 said second stator winding;
First current detecting unit is used for the three-phase current of said first stator winding is detected;
Second current detecting unit is used for the three-phase current of said second stator winding is detected;
Controller; In its input one is connected with said first current detecting unit; In its input another is connected with said second current detecting unit; In in its output one input with said inversion unit another is connected at least; Be used for according to set-point, the fundametal compoment harmonic component that the three-phase current of the three-phase current of said first stator winding that detected and said second stator winding is separated into separately controlled respectively, to obtain control signal to said inversion unit output.
2. motor variable-frequency speed-regulating system according to claim 1 is characterized in that, said 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.
3. motor variable-frequency speed-regulating system according to claim 1 is characterized in that, also comprises:
Encoder directly links to each other with the axle of said brushless dual-feed motor, is used for to the position relevant information of controller output with the rotor of said brushless dual-feed motor.
4. motor variable-frequency speed-regulating system according to claim 1 is characterized in that, also comprises:
First contactor, another in the output of its input and high-voltage ac power and said controller is connected, and its output is connected with said first stator winding.
5. motor variable-frequency speed-regulating system according to claim 1 is characterized in that, said controller comprises:
The current separation module, the three-phase current of first stator winding that is used for said first current detecting unit is detected and the three-phase current of second stator winding that said second current detecting unit is detected separate into corresponding fundametal compoment harmonic component respectively;
Control module is used for according to set-point, and the fundametal compoment harmonic component of the three-phase current of the corresponding fundametal compoment harmonic component of the three-phase current of first stator winding that detected and second stator winding that detected is controlled respectively;
Synthesis module is used for the control output of each fundametal compoment harmonic component is synthesized, to obtain the control signal to said inversion unit output.
6. motor variable-frequency speed-regulating system according to claim 5 is characterized in that, said current separation module comprises:
The amplitude determination module is used to confirm the amplitude of the fundametal compoment that the three-phase current that detected is corresponding, and wherein, the electric current that is detected is the three-phase current of the three-phase current of first stator winding that detected or second stator winding that detected;
The first-harmonic determination module; Be used for amplitude with determined fundametal compoment and multiply by Sin θ, Sin (θ-120 °), Sin (θ+120 °) respectively; The fundametal compoment of the electric current that obtains being detected, wherein θ is the phase angle number of degrees of the first-harmonic of a phase current in the three-phase current that is detected;
The harmonic wave determination module is used for the three-phase current that is detected is deducted its fundametal compoment, the harmonic component of the three-phase current that obtains being detected.
7. motor variable-frequency speed-regulating system according to claim 6 is characterized in that, said control module comprises:
Coordinate transformation module is used for according to coordinate transform angle θ
1Fundametal compoment to the electric current of first stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
2Fundametal compoment to the electric current of second stator winding that detected is carried out the DQ coordinate transform, according to coordinate transform angle θ
S1To the harmonic component of the electric current of first stator winding that detected with according to coordinate transform angle θ
S2The harmonic component of the electric current of second stator winding that is detected is carried out the DQ coordinate transform, wherein θ
1Be the magnetomotive phase angle of said first stator winding, said θ
2Be the magnetomotive phase angle of said second stator winding, said θ
S1Be the angle of rotor magnetomotive force phase angle and the magnetomotive phase angle of said first stator winding, said θ
S2Angle for rotor magnetomotive force phase angle and the magnetomotive phase angle of said second stator winding;
The DQ control module is used for the set-point corresponding according to each fundametal compoment harmonic component, respectively each the D axle component and the Q axle component that carry out exporting after the DQ coordinate transform is controlled.
8. motor variable-frequency speed-regulating system according to claim 7 is characterized in that, said controller also comprises:
The coordinate inverse transform block is used for to each fundametal compoment harmonic component, and D axle component and the Q axle component of controlling back output carried out the DQ inverse transformation;
Each addition respectively mutually of the control signal that said synthesis module is further used for each fundametal compoment harmonic component is carried out exporting after the DQ inverse transformation obtains to the corresponding phase of the control signal of said inversion unit output.
9. according to each described motor variable-frequency speed-regulating system among the claim 1-8, it is characterized in that said controller is control voltage to the control signal of said inversion unit output.
10. according to each described motor variable-frequency speed-regulating system among the claim 5-8, it is characterized in that said control module is the proportional integral adjustment module.
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| CN2011202439960U CN202111662U (en) | 2011-07-08 | 2011-07-08 | Motor variable-frequency speed governing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244496A (en) * | 2011-07-08 | 2011-11-16 | 大禹电气科技股份有限公司 | Variable frequency speed-adjusting system for motor |
| CN103216452A (en) * | 2013-04-25 | 2013-07-24 | 常州雷利电机科技有限公司 | Draining pump |
| CN106980087A (en) * | 2017-05-10 | 2017-07-25 | 中冶京诚工程技术有限公司 | The test system and method for a kind of VFC machine, variable-frequency motor |
| CN107140197A (en) * | 2017-07-02 | 2017-09-08 | 天津飞眼无人机科技有限公司 | Rotor magnetomotive unmanned plane |
| CN114400798A (en) * | 2022-01-04 | 2022-04-26 | 华中科技大学 | Single-winding direct-current excitation brushless double-fed motor and control circuit thereof |
-
2011
- 2011-07-08 CN CN2011202439960U patent/CN202111662U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244496A (en) * | 2011-07-08 | 2011-11-16 | 大禹电气科技股份有限公司 | Variable frequency speed-adjusting system for motor |
| WO2013007107A1 (en) * | 2011-07-08 | 2013-01-17 | 大禹电气科技股份有限公司 | Variable frequency speed control system for motor |
| 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 |
| CN103216452A (en) * | 2013-04-25 | 2013-07-24 | 常州雷利电机科技有限公司 | Draining pump |
| CN103216452B (en) * | 2013-04-25 | 2016-05-11 | 常州雷利电机科技有限公司 | Draining pump |
| CN106980087A (en) * | 2017-05-10 | 2017-07-25 | 中冶京诚工程技术有限公司 | The test system and method for a kind of VFC machine, variable-frequency motor |
| CN106980087B (en) * | 2017-05-10 | 2019-08-02 | 中冶京诚工程技术有限公司 | The test macro and method of a kind of frequency control machine, variable-frequency motor |
| CN107140197A (en) * | 2017-07-02 | 2017-09-08 | 天津飞眼无人机科技有限公司 | Rotor magnetomotive unmanned plane |
| CN107140197B (en) * | 2017-07-02 | 2023-06-06 | 天津飞眼无人机科技有限公司 | Rotor magnetomotive unmanned aerial vehicle |
| CN114400798A (en) * | 2022-01-04 | 2022-04-26 | 华中科技大学 | Single-winding direct-current excitation brushless double-fed motor and control circuit thereof |
| CN114400798B (en) * | 2022-01-04 | 2023-08-04 | 华中科技大学 | Single-winding direct-current excitation brushless double-fed motor and control circuit thereof |
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