CN205509913U - Frequency conversion controlling device for open winding asynchronous machine - Google Patents
Frequency conversion controlling device for open winding asynchronous machine Download PDFInfo
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- CN205509913U CN205509913U CN201620176731.6U CN201620176731U CN205509913U CN 205509913 U CN205509913 U CN 205509913U CN 201620176731 U CN201620176731 U CN 201620176731U CN 205509913 U CN205509913 U CN 205509913U
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- converter
- fuse
- asynchronous motor
- winding asynchronous
- phase
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Abstract
The utility model discloses a frequency conversion controlling device for open winding asynchronous machine is applicable to the high -pressure large capacity occasion that reliabilities such as driving mine winder was had relatively high expectations. The device comprises isolation transformer, fuse, three -phase reactor, converter, division winding asynchronous machine, controller, contactor, three -phase AC power supply and speedtransmitter. The both sides of opening winding asynchronous machine stator winding are connected to converter 1 and converter 2 respectively to be connected to three -phase AC power supply through aforementioned intermediate equipment. Converter 1 is the same with the structure of converter 2, and the rectifier is not controlled for diode three -phase bridge type to the rectification side, and the contravariant side is three inverter on the diode -clamped type. On the one hand, this device accessible utilizes lower power grade's switching element to realize the big power conversion of high pressure, on the other hand, this device have better fault -tolerance can, when arbitrary converter breaks down when the device in, can realize single converter mode, the assurance motor do not shut down the operation in succession.
Description
Technical field
This utility model relates to out the frequency-converting control device of winding asynchronous motor, is particularly suited for the high-voltage large-capacity occasion driving the reliability requirements such as mine hoist higher.
Background technology
Multilevel technology in frequency-converting control device has the features such as the output quality of power supply is high, power device voltage stress is low, switching loss is little, the problem overcoming the pressure deficiency of high-power switch device to a certain extent.Through development for many years, multi-level inverse conversion technology defines the topological structure of several maturation: clamper type multi-electrical level inverter, cascade multilevel inverter and stacked multi-electrical level inverter and Multiple Superposition formula inverter etc., wherein, being most widely used with three-level NPC inverter especially.But it is constrained to the technical parameter of current power device, generally uses the mode of multiple power devices series connection to improve changer output voltage grade.Which needs to ensure that the born voltage of each switching device of series connection is equal, and this is necessary for adding special gate drive circuit, while causing power device control circuit to complicate, too increases the fault rate of changer.
In order to improve the output voltage grade of frequency-converting control device further, avoiding many power devices to connect, the output level number increasing the changer in frequency-converting control device is a kind of well selection simultaneously.In multi-level converter topological structure, diode clamp bit-type topology, when expanding to more than five level, is difficult to the balance of holding capacitor voltage under high modulation, and striding capacitance type topology there is also similar problem；H bridge cascade multi-level topology preferably solves voltage-sharing in the way of multiple-unit superposition, it is successfully applied to industrial circle, but due to its special structure, has needed to configure zigzag transformer, it is greatly increased equipment volume and cost, and four quadrant running relatively difficult to achieve.
Summary of the invention
For the weak point in existing converter plant, the purpose of this utility model is to provide a kind of simple, operation and easy to control, the frequency-converting control device driving winding asynchronous motor of dependable performance, compact conformation.
This utility model opens the frequency-converting control device of winding asynchronous motor, mainly by isolating transformer 1, fuse 1, three-phase reactor 1, converter 1, drive winding asynchronous motor, controller, catalyst 1, catalyst 2, converter 2, three-phase reactor 2, fuse 2, isolating transformer 2, three-phase alternating-current supply and velocity sensor and constitute.The side opening winding asynchronous motor stator winding is connected to converter 1, and converter 1 connects three-phase reactor 1, and three-phase reactor 1 is connected to fuse 1, and fuse 1 is connected to isolating transformer 1, and isolating transformer 1 is connected to three-phase alternating-current supply；The opposite side opening winding asynchronous motor stator winding is connected to converter 2, and converter 2 connects three-phase reactor 2, and three-phase reactor 2 is connected to fuse 2, and fuse 2 is connected to isolating transformer 2, and isolating transformer 2 is connected to three-phase alternating-current supply.It is provided with air switch 1 between fuse 1 and isolating transformer 1, between fuse 2 and isolating transformer 2, is provided with air switch 2；Converter 1 and open and be provided with current sensing means between winding asynchronous motor, in order to detect the three-phase current signal of motor；It is provided with pre-charging device 1 between converter 1 and three-phase reactor 1, in order to limit power on moment to the charging current of condenser in converter 1, thus ensures that the element of the commutator in converter 1 will not damage because of the short circuit current of capacitor moment；Converter 2 and open and be provided with catalyst 1 and catalyst 2 between winding asynchronous motor, pre-charging device 2 it is provided with between converter 2 and three-phase reactor 2, in order to limit the charging current of capacitor in power on moment converter 2, thus ensure that the rectifier element in converter 2 will not damage because of the short circuit current of capacitor moment；Speed probe is contained in out on the armature spindle of winding asynchronous motor, in order to detect the tach signal of motor.Detect the motor three-phase current signal obtained the most at last and motor speed signal is given controller and carried out computing, and then drive the inverter unit in converter 1 and converter 2.Described converter 1 is identical with the structure of converter 2, and rectification side is diode three-phase bridge uncontrollable rectifier device, and inverter side is diode-clamped three-level inverter.
This utility model opens the frequency-converting control device of winding asynchronous motor, use the Vector Control System of Induction Motor strategy pressing rotor flux linkage orientation, on the one hand it is adjusted by given rotating speed and actual speed and given magnetic linkage and the magnetic linkage recorded, it is achieved whole frequency-converting control device system double-closed-loop control；On the other hand introduce feedforward compensation method, it is achieved excitation current component and the uneoupled control of torque current component, improve the dynamic property of overall frequency-converting control device system.
This utility model opens the frequency-converting control device of winding asynchronous motor, use the modulation strategy of space voltage vector decoupling, the independence that can realize the converter 1 in whole frequency-converting control device and converter 2 controls, this method is advantageous in that the fault freedom that can improve whole frequency-converting control device, when the converter 2 in frequency-converting control device breaks down, catalyst 2 is utilized to be disconnected by faulty component, catalyst 1 is closed, the side making out the stator winding of winding asynchronous motor becomes Y-connection mode, ensure motor does not shut down operation continuously, this will have the biggest utilization prospect in coal mine lifting airport is closed.
Accompanying drawing explanation
Accompanying drawing is the frequency-converting control device system diagram that this utility model drives winding asynchronous motor.
In figure: 1 three-phase alternating-current supply；2 isolating transformers 1；3 air switches 1；4 fuses 1；5 three-phase reactors 1；6 pre-charging devices 1；7 converters 1；8 current sensing means；9 drive winding asynchronous motor；10 velocity sensors；11 controllers；12 catalysts 1；13 catalysts 2；14 converters 2；15 pre-charging devices 2；16 three-phase reactors 2；17 fuses 2；18 air switches 2；19 isolating transformers 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, an embodiment in this utility model is further described:
Shown in accompanying drawing, this utility model opens the frequency-converting control device of winding asynchronous motor, mainly by isolating transformer 1 (2), fuse 1 (4), three-phase reactor 1 (5), converter 1 (7), drive winding asynchronous motor (9), controller (11), catalyst 1 (12), catalyst 2 (13), converter 2 (14), three-phase reactor 2 (16), fuse 2 (17), isolating transformer 2 (19), three-phase alternating-current supply (1) and velocity sensor (10) and constitute.The side of the stator winding driving winding asynchronous motor (9) is connected to converter 1 (7), converter 1 (7) is connected to three-phase reactor 1 (5), three-phase reactor 1 (5) is connected to fuse 1 (4), fuse 1 (4) is connected to isolating transformer 1 (2), and isolating transformer 1 (2) is connected to three-phase alternating-current supply (1)；The opposite side of the stator winding driving winding asynchronous motor (9) is connected to converter 2 (14), converter 2 (14) is connected to three-phase reactor 2 (16), three-phase reactor 2 (16) is connected to fuse 2 (17), fuse 2 (17) is connected to isolating transformer 2 (19), and isolating transformer 2 (19) is connected to three-phase alternating-current supply (1).nullAir switch 1 (3) it is provided with between fuse 1 (4) and isolating transformer 1 (2)，Air switch 2 (18) it is provided with between fuse 2 (17) and isolating transformer 2 (19)，Converter 1 (7) and open and be provided with current sensing means (8) between winding asynchronous motor (9)，Pre-charging device 1 (6) it is provided with between converter 1 (7) and three-phase reactor 1 (5)，Converter 2 (14) and open and be provided with catalyst 1 (12) and catalyst 2 (13) between winding asynchronous motor (9)，Pre-charging device 2 (15) it is provided with between converter 2 (14) and three-phase reactor 2 (16)，Velocity sensor (10) is contained in out on the armature spindle of winding asynchronous motor (9)，Motor three-phase current signal detection obtained and motor speed signal give controller (11).In controller (11), on the one hand the motor three-phase current signal detected is obtained the current signal under biphase rotating coordinate system through conversion, then the motor speed signal composition flux observation detected with velocity sensor (10), obtain rotor flux, by carrying out deviation computing with given rotor flux, using the deviation value of computing gained as the input of actuator, given as excitation current component of the output valve of actuator；On the other hand, the motor speed signal detected by given tach signal and velocity sensor (10) carries out deviation computing, using the deviation value of computing gained as the input of actuator, the output valve of actuator giving as torque current component, whole controller (11) is made to constitute the control unit of two close cycles, the method introducing feedforward compensation again in this control unit, improves the dynamic property of whole frequency-converting control device system.
Claims (3)
1. the frequency-converting control device driving winding asynchronous motor, it is characterised in that: mainly by isolating transformer 1 (2), fuse 1 (4), three-phase reactor 1 (5), converter 1 (7), drive winding asynchronous motor (9), controller (11), catalyst 1 (12), catalyst 2 (13), converter 2 (14), three-phase reactor 2 (16), fuse 2 (17), isolating transformer 2 (19), three-phase alternating-current supply (1) and velocity sensor (10) and constitute；The side opening winding asynchronous motor (9) stator winding is connected to converter 1 (7), converter 1 (7) is connected to three-phase reactor 1 (5), three-phase reactor 1 (5) is connected to fuse 1 (4), fuse 1 (4) is connected to isolating transformer 1 (2), and isolating transformer 1 (2) is connected to three-phase alternating-current supply (1)；The opposite side opening winding asynchronous motor (9) stator winding is connected to converter 2 (14), converter 2 (14) is connected to three-phase reactor 2 (16), three-phase reactor 2 (16) is connected to fuse 2 (17), fuse 2 (17) is connected to isolating transformer 2 (19), and isolating transformer 2 (19) is connected to three-phase alternating-current supply (1)；nullAir switch 1 (3) it is provided with between fuse 1 (4) and isolating transformer 1 (2)，Air switch 2 (18) it is provided with between fuse 2 (17) and isolating transformer 2 (19)，Converter 1 (7) and open and be provided with current sensing means (8) between winding asynchronous motor (9)，Pre-charging device 1 (6) it is provided with between converter 1 (7) and three-phase reactor 1 (5)，Converter 2 (14) and open and be provided with catalyst 1 (12) and catalyst 2 (13) between winding asynchronous motor (9)，Pre-charging device 2 (15) it is provided with between converter 2 (14) and three-phase reactor 2 (16)，Speed probe (10) is contained in out on the armature spindle of winding asynchronous motor (9)，Detect the motor three-phase current signal obtained the most at last and motor speed signal is given controller (11) and carried out computing.
A kind of frequency-converting control device driving winding asynchronous motor, it is characterized in that: described converter 1 (7) is identical with the structure of converter 2 (14), rectification side is diode three-phase bridge uncontrollable rectifier device structure, and inverter side is diode-clamped three-level inverter structure.
A kind of frequency-converting control device driving winding asynchronous motor; it is characterized in that: described frequency-converting control device has good fault freedom; when the converter 2 (14) in frequency-converting control device breaks down; catalyst 2 (13) is utilized to be disconnected by faulty component; catalyst 1 (12) is closed; the side making out the stator winding of winding asynchronous motor (9) becomes Y-connection mode, thus ensures that the continuous of motor does not shut down operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620176731.6U CN205509913U (en) | 2016-03-08 | 2016-03-08 | Frequency conversion controlling device for open winding asynchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620176731.6U CN205509913U (en) | 2016-03-08 | 2016-03-08 | Frequency conversion controlling device for open winding asynchronous machine |
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| Publication Number | Publication Date |
|---|---|
| CN205509913U true CN205509913U (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620176731.6U Expired - Fee Related CN205509913U (en) | 2016-03-08 | 2016-03-08 | Frequency conversion controlling device for open winding asynchronous machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092594A (en) * | 2018-01-19 | 2018-05-29 | 长安大学 | One kind opens winding three-phase motor fault-tolerant system and its control method |
| CN109560744A (en) * | 2017-09-26 | 2019-04-02 | 株式会社东芝 | The wiring switching method of motor-driven system and open circuit winding construction motor |
| CN111216575A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Electric automobile and open winding electric automobile drive and charging system |
-
2016
- 2016-03-08 CN CN201620176731.6U patent/CN205509913U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560744A (en) * | 2017-09-26 | 2019-04-02 | 株式会社东芝 | The wiring switching method of motor-driven system and open circuit winding construction motor |
| CN109560744B (en) * | 2017-09-26 | 2022-04-12 | 株式会社东芝 | Motor driving system and wiring switching method of open winding structure motor |
| CN108092594A (en) * | 2018-01-19 | 2018-05-29 | 长安大学 | One kind opens winding three-phase motor fault-tolerant system and its control method |
| CN111216575A (en) * | 2018-11-26 | 2020-06-02 | 河南森源重工有限公司 | Electric automobile and open winding electric automobile drive and charging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160824 Termination date: 20170308 |