CN102624318B - Online space vector state display device for monopole asynchronous motor - Google Patents
Online space vector state display device for monopole asynchronous motor Download PDFInfo
- Publication number
- CN102624318B CN102624318B CN201210120977.8A CN201210120977A CN102624318B CN 102624318 B CN102624318 B CN 102624318B CN 201210120977 A CN201210120977 A CN 201210120977A CN 102624318 B CN102624318 B CN 102624318B
- Authority
- CN
- China
- Prior art keywords
- signal output
- microprocessor
- positive
- negative amplitude
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses an online space vector state display device for a monopole asynchronous motor, belonging to the technical field of motor control. The online space vector state display device solves the problem of incapability of displaying a space vector state in real time when a space vector driving method of a three-phase motor main loop is adopted for controlling the monopole asynchronous motor. The online space vector state display device for the monopole asynchronous motor comprises an A phase voltage switching circuit, a B phase voltage switching circuit, a microprocessor and a display, wherein common ground unipolar signal output ends of a positive amplitude signal and a negative amplitude signal of the two phase voltage switching circuits are respectively connected with a first analog quantity signal input end, a second analog quantity signal input end, a third analog quantity signal input end and a fourth analog quantity signal input end of the microprocessor, the first positive and negative amplitude composite signal output end of the microprocessor is connected with the vertical coordinate signal input end of the display, and the second positive and negative amplitude composite signal output end of the microprocessor is connected with the horizontal ordinate input end of the display. The invention is suitable for online space vector state displaying of the monopole asynchronous motor.
Description
Technical field
The present invention relates to a kind of online space vector for monopole asynchronous motor, belong to electric machines control technology field.
Background technology
In threephase motor control procedure, the space vector of major loop drives the technology that has become a kind of maturation.While the space vector driving method of threephase motor major loop being applied in the control of monopole asynchronous motor, in the running of controlling, because its space vector state can not, by real-time showing, therefore, cannot directly obtain concrete ruuning situation and control effect.
Summary of the invention
The present invention is in order to solve when the space vector driving method that adopts threephase motor major loop is controlled monopole asynchronous motor, the problem that its space vector state can not be shown in real time, provides a kind of online space vector for monopole asynchronous motor.
Online space vector for monopole asynchronous motor of the present invention, it comprises A phase voltage change-over circuit, B phase voltage change-over circuit, microprocessor and display,
A phase voltage change-over circuit is for gathering the voltage signal of A phase winding, and B phase voltage change-over circuit is used for gathering the voltage signal of B phase winding,
The common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit connects the first analog signals input of microprocessor, the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit connects the second analog signals input of microprocessor
The common ground unipolar signal output of the true amplitude signal of B phase voltage change-over circuit connects the 3rd analog signals input of microprocessor, the common ground unipolar signal output of the negative amplitude signal of B phase voltage change-over circuit connects the 4th analog signals input of microprocessor
The first positive and negative amplitude composite signal output of microprocessor connects the ordinate signal input part of display, and the second positive and negative amplitude composite signal output of microprocessor connects the abscissa signal input part of display.
A phase voltage change-over circuit is identical with the structure of B phase voltage change-over circuit, the structure that the A phase voltage change-over circuit of take is example account for voltage change-over circuit,
Described A phase voltage change-over circuit is comprised of bleeder circuit, forward rectification circuit, reverse rectification circuit, the first transformer and the second transformer,
Bleeder circuit is for drawing the voltage signal dividing potential drop of A phase winding, the forward voltage signal output part of bleeder circuit connects the input of forward rectification circuit, the signal output part of forward rectification circuit connects the voltage signal input of the first transformer, the reverse voltage signal output of bleeder circuit connects the input of reverse rectification circuit, oppositely the signal output part of rectification circuit connects the voltage signal input of the second transformer
The voltage signal output end of the first transformer is the common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit, and the voltage signal output end of the second transformer is the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit.
Described microprocessor by four altogether A/D converting unit and two positive and negative amplitude synthesis units form,
Four altogether the analog signals input of A/D converting unit be respectively four analog signals inputs of microprocessor, wherein two altogether A/D converting unit be respectively used to convert the positive and negative amplitude signal of A phase winding to digital signal and export to a positive and negative amplitude synthesis unit, the first positive and negative amplitude composite signal output that the composite signal output of this positive and negative amplitude synthesis unit is microprocessor
Two other altogether A/D converting unit be respectively used to convert the positive and negative amplitude signal of B phase winding to digital signal and export to another positive and negative amplitude synthesis unit, the second positive and negative amplitude composite signal output that the composite signal output of this another positive and negative amplitude synthesis unit is microprocessor.
Described bleeder circuit is composed in series by two resistance; Forward rectification circuit adopts diode forward rectification to realize, and oppositely rectification circuit adopts diode reverse rectification to realize.
Described microprocessor is that model is the single-chip microcomputer of C8051F020.
Described display is that specification is 12864 liquid crystal display.
Described positive and negative amplitude synthesis unit is pressed the synthetic track amount of quadrature for the two-way of input being exchanged to amplitude signal.
Advantage of the present invention is: the present invention realizes the collection to the two-phase coil windings voltage signal of single-phase asynchronous motor by voltage conversion circuit, at microprocessor internal, respectively two phase voltage signals are vertically synthesized again, and then show in real time by display, realized the online demonstration of space vector state in monopole asynchronous motor control procedure.
The present invention has realized the on-line monitoring to monopole asynchronous motor space vector state, simple in structure, and signal processing mode is direct, and concrete ruuning situation and the control effect of the control procedure of monopole asynchronous motor can be controlled constantly.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 be the present invention in use with the principle schematic being connected by measured motor;
Fig. 4 is the schematic flow sheet that microprocessor is processed data;
Fig. 5 is the model schematic diagram of existing single phase induction motor;
Fig. 6 is the structural representation of the inverter that adopts of existing single phase induction motor;
Fig. 7 is space vector of voltage and voltage-source type inverter circuit schematic diagram;
Fig. 8 is the operating state trajectory diagram that inverter is exported within a complete output cycle.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 8, described in present embodiment for online space vector of monopole asynchronous motor, it comprises A phase voltage change-over circuit 1, B phase voltage change-over circuit 2, microprocessor 3 and display 4
A phase voltage change-over circuit 1 is for gathering the voltage signal of A phase winding, and B phase voltage change-over circuit 2 is for gathering the voltage signal of B phase winding,
The common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit 1 connects the first analog signals input of microprocessor 3, the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit 1 connects the second analog signals input of microprocessor 3
The common ground unipolar signal output of the true amplitude signal of B phase voltage change-over circuit 2 connects the 3rd analog signals input of microprocessor 3, the common ground unipolar signal output of the negative amplitude signal of B phase voltage change-over circuit 2 connects the 4th analog signals input of microprocessor 3
The first positive and negative amplitude composite signal output of microprocessor 3 connects the ordinate signal input part of display 4, and the second positive and negative amplitude composite signal output of microprocessor 3 connects the abscissa signal input part of display 4.
Monopole asynchronous motor of the present invention be a class Applicative time the earliest, the motor of the widest, the Winding Single Phase Capacitance of range of application and low-power applications.Its two groups of stator coils, main coil L
qwith ancillary coil L
dconventionally in the mode of quadrature, place, the stator power that is added to two coils should have the phase difference of 90 degree, to guarantee that forming stator rotating magnetic field rotates rotor.As shown in Figure 5, its rotor winding represents with α and β, and ω is rotor velocity.The axis of α phase winding and ancillary coil L
dthe angle theta angle of axis be space displacement variable.
The method that produces two coil quadratures control voltages has two kinds: first method is ancillary coil L
dconnect some electric component again with main coil L
qparallel connection, only needs a stator to control voltage, therefore can use single phase alternating current power supply; Second method is that two coils add respectively the stator of quadrature to control voltage, and this namely controls respectively in two-phase alternating current source.
In prior art, monopole asynchronous motor is carried out to two-phase control mode respectively, its control circuit is shown in Figure 6.Due to the development of power electronic technology and microprocessor technology, from single phase alternating current power supply commutation inversion, be that the technology of polyphase ac electric energy is ripe, for the two-phase of monopole asynchronous motor respectively control technology technical foundation is provided.And the two-phase of load motor respectively control technology can save capacitor, be convenient to speed governing, the easy to use and similar control technology of three phase alternating current motor, be therefore widely used in the control of individual event induction machine.
In the two-phase of individual event asynchronous machine is controlled respectively, be mainly to adopt space vector to control.In three phase inverter bridge as shown in Figure 7, six switching tubes can form the switch combination situation of eight kinds of permissions, be VT1, VT4, VT6 conducting, VT1, VT3, VT6 conducting, VT2, VT3, VT6 conducting, VT2, VT3, VT5 conducting, VT2, VT4, VT5 conducting, VT1, VT4, VT5 conducting, VT1, VT3, VT5 conducting and VT2, VT4, eight kinds of conducting situations of VT6 conducting.As upper arm break-over of device is represented by numeral 1, lower brachium pontis break-over of device represents by numeral 0, can be expressed as shown in Fig. 8 V when above-mentioned eight kinds of operating states are arranged in order according to ABC phase sequence
3: 100, V
2: 110, V
1: 010, V
6: 011, V
5: 001, V
4: 101 and V
7: 000 and V
8: 111.From the normal operation of inverter, analyze, the first six plants operating state is effectively, and latter two state is invalid, because inverter is at this very moment at all without any output voltage, inverter does not play any effect completely.
Inverter has respectively six kinds of effective operating states in each complete cycle of output, and each appearance of these six kinds of operating states once.So inverter, every moment of 2 π/6 conversion operating state effectively once just, is referred to as " commutation ", and within the moment of 2 π/6 time, its phase place remains unchanged.If the work period is from V
3: 100 states start, at this moment VT1, VT4, VT6 conducting, motor stator A point current potential is for just, and B and C point are for negative, they are all that amplitude is the direct voltage of VDC/2 to the voltage of DC power supply mid point, and the phase place of three-phase voltage space vector lays respectively on A, B, tri-axis of C.Follow the conversion of the effective operating state of inverter, the amplitude of space vector of voltage does not change, and 2 π/6 of the each rotation of phase place, until a complete change-over period finishes, as shown in Figure 8, six space vectors can just accomplish that head and the tail are connected in turn, so, in the complete transformation period, six space vector of voltage value corotations turn a 2 π radian value, have formed the circulation hexagonal pattern of a sealing.As for V
8: 111 and V
7: 000 is all respectively invalid operating state, and their value can give null vector value, and their amplitude is also zero, more there is no phase place, can think that they are present in hexagonal pattern center position.
Embodiment two: present embodiment is described below in conjunction with Fig. 1, present embodiment is further illustrating execution mode one, A phase voltage change-over circuit 1 is identical with the structure of B phase voltage change-over circuit 2, take A phase voltage change-over circuit 1 structure as example account for voltage change-over circuit
Described A phase voltage change-over circuit 1 is comprised of bleeder circuit 1-1, forward rectification circuit 1-2, reverse rectification circuit 1-3, the first transformer 1-4 and the second transformer 1-5,
Bleeder circuit 1-1 is for drawing the voltage signal dividing potential drop of A phase winding, the forward voltage signal output part of bleeder circuit 1-1 connects the input of forward rectification circuit 1-2, the signal output part of forward rectification circuit 1-2 connects the voltage signal input of the first transformer 1-4, the reverse voltage signal output of bleeder circuit 1-1 connects the input of reverse rectification circuit 1-3, oppositely the signal output part of rectification circuit 1-3 connects the voltage signal input of the second transformer 1-5
The voltage signal output end of the first transformer 1-4 is the common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit 1, and the voltage signal output end of the second transformer 1-5 is the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit 1.
Embodiment three: below in conjunction with Fig. 1, present embodiment is described, present embodiment is for to the further illustrating of execution mode one or two, described microprocessor 3 by four altogether A/D converting unit 3-1 and two positive and negative amplitude synthesis unit 3-2 form,
Four altogether the analog signals input of A/D converting unit 3-1 be respectively four analog signals inputs of microprocessor 3, wherein two altogether A/D converting unit 3-1 be respectively used to convert the positive and negative amplitude signal of A phase winding to digital signal and export to a positive and negative amplitude synthesis unit 3-2, the composite signal output of this positive and negative amplitude synthesis unit 3-2 is the first positive and negative amplitude composite signal output of microprocessor 3
Two other altogether A/D converting unit 3-1 be respectively used to convert the positive and negative amplitude signal of B phase winding to digital signal and export to another positive and negative amplitude synthesis unit 3-2, the composite signal output of this another positive and negative amplitude synthesis unit 3-2 is the second positive and negative amplitude composite signal output of microprocessor 3.
First the voltage signal of motor stator winding draws through bleeder circuit 1-1.Although two added voltages of winding of monopole asynchronous motor are quadratures, each amount of taking out through bleeder circuit is scalar.For ease of this two-way ac input signal is added in microprocessor 3, every road signal all resolves into unipolar component of voltage by forward and reverse rectification, then becomes four input variables altogether through transformer.Like this, can use the A/D converter on the common ground of microprocessor 3 inside that the analog quantity of input is converted to digital quantity.Again four railway digital signals are synthesized to corresponding two-way measurement data.This two-way measurement data is shown as abscissa data and the ordinate data of liquid crystal display respectively.In this case, the demonstration relation of this two-way measurement data is quadrature.
As shown in Figure 2, first, the voltage signal of every phase winding of monopole asynchronous motor two phase windings is through bleeder circuit R
1, R
2with bleeder circuit R
3, R
4draw.The AC signal of first winding is passed through D
1forward rectification and D
2reverse rectification resolve into unipolar component of voltage, then after two transformers are converted to common ground positive signal, be input to AI0.0, AI0.1, AI0.2 and the AI0.3 terminal of single-chip microcomputer.The input of the A/D converter of the inside that these four terminals are single-chip microcomputer C8051F020 is also common ground.Enter shown in the following flow process 4 of signal processing after single-chip microcomputer.Single-chip microcomputer is defining variable used and is stating after function used, and Jiang Si road analog input signal deposits corresponding unit in after being converted to digital signal.Zai Ba tetra-tunnel input digital quantities synthesize corresponding two-way measurement data by original paired mode.Finally this two-way measurement data is shown as abscissa data and the ordinate data of liquid crystal display respectively.If do not stop at line monitoring, turn back to this operation of system and each parts initialization and continue to loop afterwards above-mentioned same signal processing.
Embodiment four: below in conjunction with Fig. 1 and Fig. 2, present embodiment is described, present embodiment is for to the further illustrating of execution mode one, two or three, and described bleeder circuit 1-1 is composed in series by two resistance; Forward rectification circuit 1-2 adopts diode forward rectification to realize, and oppositely rectification circuit 1-3 adopts diode reverse rectification to realize.
Embodiment five: below in conjunction with Fig. 2, present embodiment is described, present embodiment is for to the further illustrating of execution mode one, two, three or four, the single-chip microcomputer that described microprocessor 3 is C8051F020 for model.
Embodiment six: below in conjunction with Fig. 2, present embodiment is described, present embodiment is for to the further illustrating of execution mode one, two, three, four or five, the liquid crystal display that described display 4 is 12864 for specification.
Embodiment seven: present embodiment is described below in conjunction with Fig. 4, present embodiment is for to the further illustrating of execution mode one, two, three, four, five or six, and described positive and negative amplitude synthesis unit 3-2 press quadrature and synthesizes a track amount for the two-way of input being exchanged to amplitude signal.
12864 liquid crystal display are a kind of have 4/8 parallel-by-bits, 2 line 3 line serial multiple interfaces modes, dot-matrix lcd modules that international one-level, secondary simplified form of Chinese Character character library are contained in inside; Its display resolution is 128*64, built-in 8912 16*16 point Chinese characters, and 128 16*8 point ascii character-sets.Utilize this module interface mode and operational order simply and easily flexibly, can form complete Chinese man-machine interaction graphical interfaces.Can show the capable 16*16 dot matrix Chinese character of 8*4.Also can complete figure shows.Low-voltage Low-power is the another distinguishing feature of this display.This liquid crystal display scheme is compared with dot matrix LCD module of the same type, much succinct no matter hardware circuit or display routine are all wanted.And the price of this module is also a little less than the graphic LCD module of identical dot matrix.
12864 liquid crystal display pins are as shown in the table:
The explanation of table 12864 liquid crystal display pin
Claims (5)
1. for online space vector for monopole asynchronous motor, it is characterized in that: it comprises A phase voltage change-over circuit (1), B phase voltage change-over circuit (2), microprocessor (3) and display (4),
A phase voltage change-over circuit (1) is for gathering the voltage signal of A phase winding, and B phase voltage change-over circuit (2) is for gathering the voltage signal of B phase winding,
The common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit (1) connects the first analog signals input of microprocessor (3), the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit (1) connects the second analog signals input of microprocessor (3)
The common ground unipolar signal output of the true amplitude signal of B phase voltage change-over circuit (2) connects the 3rd analog signals input of microprocessor (3), the common ground unipolar signal output of the negative amplitude signal of B phase voltage change-over circuit (2) connects the 4th analog signals input of microprocessor (3)
The first positive and negative amplitude composite signal output of microprocessor (3) connects the ordinate signal input part of display (4), and the second positive and negative amplitude composite signal output of microprocessor (3) connects the abscissa signal input part of display (4);
Wherein said A phase voltage change-over circuit (1) is identical with the structure of B phase voltage change-over circuit (2), the structure that the A phase voltage change-over circuit (1) of take is example account for voltage change-over circuit,
Described A phase voltage change-over circuit (1) is comprised of bleeder circuit (1-1), forward rectification circuit (1-2), reverse rectification circuit (1-3), the first transformer (1-4) and the second transformer (1-5),
Bleeder circuit (1-1) is for drawing the voltage signal dividing potential drop of A phase winding, the forward voltage signal output part of bleeder circuit (1-1) connects the input of forward rectification circuit (1-2), the signal output part of forward rectification circuit (1-2) connects the voltage signal input of the first transformer (1-4), the reverse voltage signal output of bleeder circuit (1-1) connects the input of reverse rectification circuit (1-3), oppositely the signal output part of rectification circuit (1-3) connects the voltage signal input of the second transformer (1-5)
The voltage signal output end of the first transformer (1-4) is the common ground unipolar signal output of the true amplitude signal of A phase voltage change-over circuit (1), and the voltage signal output end of the second transformer (1-5) is the common ground unipolar signal output of the negative amplitude signal of A phase voltage change-over circuit (1);
Described microprocessor (3) by four altogether A/D converting unit (3-1) and two positive and negative amplitude synthesis units (3-2) form,
Four altogether the analog signals input of A/D converting unit (3-1) be respectively four analog signals inputs of microprocessor (3), wherein two altogether A/D converting unit (3-1) be respectively used to the positive and negative amplitude signal of A phase winding to convert digital signal to and export to a positive and negative amplitude synthesis unit (3-2), the composite signal output of this positive and negative amplitude synthesis unit (3-2) is the first positive and negative amplitude composite signal output of microprocessor (3)
Two other altogether A/D converting unit (3-1) be respectively used to convert the positive and negative amplitude signal of B phase winding to digital signal and export to another positive and negative amplitude synthesis unit (3-2), the composite signal output of this another positive and negative amplitude synthesis unit (3-2) is the second positive and negative amplitude composite signal output of microprocessor (3).
2. online space vector for monopole asynchronous motor according to claim 1, is characterized in that: described bleeder circuit (1-1) is composed in series by two resistance; Forward rectification circuit (1-2) adopts diode forward rectification to realize, and oppositely rectification circuit (1-3) adopts diode reverse rectification to realize.
3. online space vector for monopole asynchronous motor according to claim 1 and 2, is characterized in that: the single-chip microcomputer that described microprocessor (3) is C8051F020 for model.
4. online space vector for monopole asynchronous motor according to claim 1 and 2, is characterized in that: the liquid crystal display that described display (4) is 12864 for specification.
5. online space vector for monopole asynchronous motor according to claim 1 and 2, is characterized in that: described each positive and negative amplitude synthesis unit (3-2) synthesizes a track amount for the two ways of digital signals that A/D converting unit (3-1) converts to altogether by two by quadrature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120977.8A CN102624318B (en) | 2012-04-23 | 2012-04-23 | Online space vector state display device for monopole asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120977.8A CN102624318B (en) | 2012-04-23 | 2012-04-23 | Online space vector state display device for monopole asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102624318A CN102624318A (en) | 2012-08-01 |
| CN102624318B true CN102624318B (en) | 2014-03-26 |
Family
ID=46564032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210120977.8A Expired - Fee Related CN102624318B (en) | 2012-04-23 | 2012-04-23 | Online space vector state display device for monopole asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102624318B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023287B (en) * | 2013-01-14 | 2014-10-29 | 黑龙江大学 | Method for modulating single-phase induction motor by aid of space-vector inverter circuit with independent power sources |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2606229A1 (en) * | 1986-10-29 | 1988-05-06 | Sari Ingenierie | System for controlling a single-phase asynchronous motor intended for driving an object such as a blind of the type with orientable slats |
| CN101194413A (en) * | 2005-06-09 | 2008-06-04 | 国际整流器公司 | Sensorless field oriented controller for two-phase motor |
| CN101635552A (en) * | 2008-07-25 | 2010-01-27 | 北京兴大豪科技开发有限公司 | Driver of two-phase stepping motor and drive control method |
| CN102064726A (en) * | 2010-12-30 | 2011-05-18 | 黑龙江大学 | Controllable double-power supply series connection asymmetric inverter for single-phase induction motor |
-
2012
- 2012-04-23 CN CN201210120977.8A patent/CN102624318B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2606229A1 (en) * | 1986-10-29 | 1988-05-06 | Sari Ingenierie | System for controlling a single-phase asynchronous motor intended for driving an object such as a blind of the type with orientable slats |
| CN101194413A (en) * | 2005-06-09 | 2008-06-04 | 国际整流器公司 | Sensorless field oriented controller for two-phase motor |
| CN101635552A (en) * | 2008-07-25 | 2010-01-27 | 北京兴大豪科技开发有限公司 | Driver of two-phase stepping motor and drive control method |
| CN102064726A (en) * | 2010-12-30 | 2011-05-18 | 黑龙江大学 | Controllable double-power supply series connection asymmetric inverter for single-phase induction motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102624318A (en) | 2012-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107222146B (en) | The Direct Torque Control of double three-phase permanent-magnetic synchronous motor high load capability | |
| CN103248304A (en) | Tri-level inversion indirect vector control system based on simplified SVPWM (space vector pulse width modulation) | |
| CN103986356B (en) | The control system of a kind of cascade multilevel inverter and method | |
| CN103973191A (en) | Default phase fault-tolerant control method of nine-phase flux-switching permanent magnetic motor | |
| CN109839830A (en) | A kind of the power stage analog control method and device of three phase alternating current motor | |
| CN103346583A (en) | Fixed-frequency direct-power PWM converter controlling method having rapid power response capability | |
| CN102355175B (en) | Brake control method for induction motor | |
| CN106787814A (en) | Nine level current transformers of magneto alternator | |
| CN104868761A (en) | Novel triangular wave comparison control method for three-phase PWM rectifier | |
| CN203119834U (en) | Inversion apparatus | |
| CN102624318B (en) | Online space vector state display device for monopole asynchronous motor | |
| CN209460370U (en) | A kind of squirrel cage asynchronous motor mechanical back to back test platform based on double PWM converter four quadrant runnings | |
| CN202143028U (en) | Frequency conversion speed regulating control device of three-phase alternating current asynchronous motor | |
| CN204190402U (en) | Building photovoltaic generation supply intelligent system | |
| CN207117518U (en) | Double feedback electric engine frequency conversion speed-adjusting system based on current source converter | |
| CN202513832U (en) | Space vector pulse width modulation (SVPWM) frequency conversion device based on digital signal processor (DSP) | |
| CN102255541B (en) | Single-phase inverter capable of performing instantaneous control under dq coordinate system and control method | |
| CN104635759A (en) | Position tracking and controlling system of azimuth axis of giant telescope | |
| CN109444745A (en) | A kind of squirrel cage asynchronous motor mechanical back to back test platform based on double PWM converter four quadrant runnings | |
| CN203149325U (en) | Variable-frequency constant-voltage water supply system | |
| CN103066874A (en) | Control device and control method of PWM (Pulse-Width Modulation) rectifier | |
| CN103001512A (en) | Control system based on inverter power source | |
| CN106652694A (en) | Sine-wave permanent magnet synchronous motor simulation system | |
| CN100568707C (en) | The domestic electric washer that a kind of economical speed governing drives | |
| CN206575336U (en) | A kind of speed-changing constant frequency constant voltage TRT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20180423 |