CN2765390Y - Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection - Google Patents

Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection Download PDF

Info

Publication number
CN2765390Y
CN2765390Y CN 200520000930 CN200520000930U CN2765390Y CN 2765390 Y CN2765390 Y CN 2765390Y CN 200520000930 CN200520000930 CN 200520000930 CN 200520000930 U CN200520000930 U CN 200520000930U CN 2765390 Y CN2765390 Y CN 2765390Y
Authority
CN
China
Prior art keywords
inversion
asynchronous motor
middle pressure
signal
comparator
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
Application number
CN 200520000930
Other languages
Chinese (zh)
Inventor
马小亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Honor East Power Co., Ltd.
Original Assignee
HUANA DONGFANG ENERGY TECH Co Ltd BEIJING
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HUANA DONGFANG ENERGY TECH Co Ltd BEIJING filed Critical HUANA DONGFANG ENERGY TECH Co Ltd BEIJING
Priority to CN 200520000930 priority Critical patent/CN2765390Y/en
Application granted granted Critical
Publication of CN2765390Y publication Critical patent/CN2765390Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

The utility model relates to a chopper type tandem speed regulating device with inversion overturning protection for a medium voltage asynchronous motor, which comprises a control circuit, an uncontrollable rectifier, a voltage boosting chopper, a thyristor inverter which are in a main circuit, an inversion overturning protector connected between the voltage boosting chopper and the thyristor inverter and a voltage boosting chopper current peak value two-point controller composed of a difference amplifier, a D/A converter, a down counter, a comparator and an output triggering device. The device is suitable for ordinary winding asynchronous motors, internal feedback winding asynchronous motors and winding cage type brushless double-fed motors, and all the advantages of existing chopper type tandem speed regulating devices are reserved; an insulating door base transistor is used for cutting off a direct current main circuit at the time of inversion overturning, the protection of inversion overturning is realized, and the problem that the device is damaged because of trouble in an electric network is solved; the current peak value two-point control is free from non-linear influences, errors are small, and dynamic parameters do not need to be adjusted; the operation is simple and convenient, and the utility model can also work when light current is interrupted.

Description

Middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection
Technical field
The utility model relates to the ac motor speed control control technology, particularly a kind of middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection.
Background technology
In the ac motor speed control control system, existing high-power (＞press that (3～10KV) AC asynchronous motor governing systems mainly are divided into stator side frequency control and rotor-side tandem control two big classes in 200KW).The stator side frequency control is regulated rotating speed at motor stator side joint medium voltage frequency converter by changing stator voltage and frequency.The medium voltage frequency converter capacity is big, is motor rated power P NAbout 1.2, the voltage of transformation height needs many power electronic device series connection, install huge, complicated, valency is high, reliability is influenced.The rotor-side tandem control is in traditional cascade adjustable-speed system, and uncontrollable rectifier of rotor side joint and thyristor inverter change rotor voltage by changing inverter triggering phase shifting angle, realize speed governing.Rotor voltage is low, and (generally＜1000V), blower fan and load of the pumps require speed adjustable range little (general 40～50%), the speed regulating device low pressure (little (0.4～0.5P of＜500V) converting electric power, and capacity in addition N), avoided the difficulty of middle pressure speed governing.Its major defect is, the phase shifting control of inverter causes the operate power factor low, and harmonic wave is big.
Develop the chopped mode cascade adjustable-speed system in recent years, the rotor side also connects uncontrollable rectifier and thyristor inverter, but it is constant to be fixed on minimum value (about 30 °) at the triggering phase shift advance angle β that adds first class boost chopper Gong Zuo Time thyristor inverter between rectifier and inverter, dc inversion voltage is fixed, recently change rotor voltage by the duty that changes chopper, realize speed governing.Compare with traditional tandem control, the chopped mode tandem control is regulated piezoelectricity machine rotating speed in the total power with the low voltage control equipment of smaller power, and power factor improves, and harmonic wave reduces.If motor load is the quadratic form load of blower fan and pump class, the inverter capacity also can reduce to (0.2～0.3P in a nearly step N) still, find that by using still there are two problems in existing chopped mode cascade speed regulator:
● at electric network fault, supply power voltage reduces suddenly or Xiao Shi Time significantly, and thyristor inverter is overturned inversion, damage equipment;
● in speed closed loop control, the control of boost chopper is made of speed outer shroud and current inner loop two parts, because the boost chopper control characteristic is non-linear, makes that the response of current inner loop is different under different rotating speeds, and the current regulator parameter adjustment is very difficult.
This makes existing chopped mode cascade speed regulator because still the problem that exists has influenced chopped mode tandem control broad application greatly.
The utility model content
The purpose of this utility model is to overcome the above-mentioned defective of tandem control, provides a kind of and protects equipment not to be damaged and all in the ranges of speeds good current response, the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection easy to adjust are being arranged all.
For achieving the above object, the utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, comprise and be connected in the main circuit control circuit of forming by contactor that links to each other successively, uncontrollable rectifier, boost chopper and thyristor inverter, also comprise the inversion stalling protection device that is connected between boost chopper and the thyristor inverter, inversion stalling protection device is by the insulated door based transistor, fly-wheel diode and the overcurrent comparator composition that is used to control the insulated door based transistor, the sampled signal of thyristor inverter output current is connected to "-" input of overcurrent comparator, the overcurrent set point is connected to "+" input of overcurrent comparator, the output signal of overcurrent comparator is connected to the control end of insulated door based transistor, insulated door based transistor control thyristor inverter Bing Tong Time overturns the contactor that signal is connected to control circuit with inversion; Insulated door based transistor control thyristor inverter Bing Tong Time overturns the contactor that signal is connected to control circuit with inversion;
Wherein, boost chopper is provided with Dian Liu Mine value two point form controller, this controller comprises differential amplifier, the D/A converter, down counter, comparator and output trigger, the dc inversion voltage of main circuit and commutating voltage through the voltage differential signal of differential amplifier output with the counting of Time clock signal in down counter is connected to the D/A converter respectively, control signal behind the given signal plus of the output of D/A converter and electric current is connected to "-" input of comparator, the rectified current signal is connected to "+" input of comparator, the reseting input signal of comparator output is connected to " R " input of output trigger, the carry signal that down counter produces is connected to " S " input of output comparator, and the triggering signal of output trigger output " Q " is connected to the control end of boost chopper.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein the D/A converter is the count value and the voltage differential signal (U of described down counter (MC) D-U DR) multiplier.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein D/A converter and described comparator (CP 1) between be connected to the voltage divider that constitutes by potentiometer, its dividing potential drop coefficient is T/2L DR
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein asynchronous motor is middle pressure conventional wound asynchronous motor.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein asynchronous motor is middle pressure internal feedback wire wound asynchronous motor.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein asynchronous motor is that middle pressure is around the cage brushless double-fed motor.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein Dian Liu Mine value two point form controller is replaced and is made of microprocessor.
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, wherein the power of asynchronous motor is greater than 200KW, and middle pressure is 3～10KV.
The middle pressure asynchronous motor chopped mode cascade speed regulator that the utility model provides with inversion stalling protection; its beneficial technical effects is: when keeping the existing whole advantages of chopped mode cascade speed regulator; utilize the turn-off capacity of insulated door based transistor; cut off its direct current main circuit at thyristor inverter inversion Dian Fu Time; realized the inversion stalling protection, solved the problem of the thyristor inverter of existing apparatus existence at electrical network Gu Zhang Time damage equipment.Simultaneously, owing to adopt Dian Liu Mine value relatively to realize two point form control in the circular current control, replace current regulator and duty ratio D generator in chopper, be not subjected to the boost chopper non-linear effects, error is little, need not to adjust dynamic parameter, and is easy to use.In the underloading electric current I DRDuan Xu Time, the controller endure.
Description of drawings
The utility model is elaborated with reference to accompanying drawing below in conjunction with embodiment.
Fig. 1 is the circuit diagram one (being used for pressing the conventional wound asynchronous motor) that the utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection;
Fig. 2 is the middle pressure asynchronous motor chopped mode cascade speed regulator circuit diagram two (being used for pressing the internal feedback wire wound asynchronous motor) that the utlity model has the inversion stalling protection;
Fig. 3 is the middle pressure asynchronous motor chopped mode cascade speed regulator circuit diagram three (being used for pressing around the cage brushless double-fed motor) that the utlity model has the inversion stalling protection;
Fig. 4 is the circuit diagram of the utility model cascade speed regulator Zhong Dian Liu Mine value two point form controller;
Fig. 5 is the oscillogram of the k switch periods of the utility model cascade speed regulator Zhong Dian Liu Mine value two point form control.
Embodiment
The utlity model has the middle pressure asynchronous motor chopped mode cascade speed regulator of inversion stalling protection, with reference to Fig. 1, comprise be connected in the main circuit link to each other successively by contactor K 1And K 2The control circuit, uncontrollable rectifier DR, boost chopper BC, inversion stalling protection device IFP and the thyristor inverter TI that form.Inversion stalling protection device IFP is by insulated door based transistor V 2, sustained diode 2Be used to control described insulated door based transistor V 2Overcurrent comparator C P 2Form, the sampled signal of thyristor inverter TI output current is connected to overcurrent comparator C P 2"-" input, overcurrent set point I *Be connected to overcurrent comparator C P 2"+" input, overcurrent comparator C P 2Output signal be connected to insulated door based transistor V 2Control end, insulated door based transistor V 2Control thyristor inverter TI Bing Tong Time overturns the contactor that signal is connected to described control circuit with inversion.
Wherein, boost chopper BC is provided with Dian Liu Mine value two point form controller, and with reference to Fig. 4, this controller comprises differential amplifier DA, D/A converter, down counter MC, comparator C P 1With output trigger FF, the dc inversion voltage U of main circuit DWith commutating voltage U DRWarp WarpThe voltage differential signal U of differential amplifier DA output D-U DRThe counting 1-τ/T of He Time clock signal in down counter MC is connected to the D/A converter respectively, the output Δ U of D/A converter cWith the given signal I of electric current *Control signal U after the addition cBe connected to comparator C P 1"-" input, rectified current signal I DRBe connected to comparator C P 1"+" input, comparator C P 1The reseting input signal rst of output is connected to " R " input of trigger FF, and the carry signal st that down counter MC produces is connected to comparator C P 1" S " input, the triggering signal of output trigger FF output " Q " is connected to the control end of boost chopper BC.
Embodiment to the middle pressure asynchronous motor chopped mode cascade speed regulator that the utlity model has the inversion stalling protection elaborates below.
Embodiment 1:
With reference to Fig. 1, in the present embodiment, motor M is middle pressure conventional wound asynchronous motor.
Uncontrollable rectifier DR in the speed regulating device switches through sub-winding (the normal Gong Zuo of Zheng Time K by the brush and the slip ring of motor 1Disconnected liter, K 2Closed), the thyristor inverter TI in the device gets access to grid by transformer TF.BC in the speed regulating device is a boost chopper, and IFP is an inversion stalling protection device, and FR is starting frequency sensitive trheostat, K 1And K 2Be three-phase contactor.
Cascade speed regulator is connected on rotor side, rotor voltage
U R＝sU R0
In the formula: s=(n 0-n)/n 0----slippage; U R0For motor does not change, the rotor voltage of s=1 Time.
Piezoelectricity machine U in existing R0＜1000V is when speed adjustable range is restricted to 50% (s≤0.5) Time, U R.max≤ 500V is so speed regulating device are low pressure.
The cascade speed regulator main circuit is in the circuit of cover uncontrollable rectifier DR, a boost chopper BC, inversion stalling protection device IFP and thyristor inverter TI composition, as the normal Gong Zuo of the Zheng of system Time insulated door based transistor V 2Conducting does not always influence inverter TI work.Work as electric network fault, U AwReduce too much or Xiao Shi Time, inversion takes place overturn thyristor inverter TI output current I AwGreater than the overcurrent set point, insulated door based transistor V 2Turn-off, thyristor inverter TI quits work, and originally the electric current in the inversion circuit inductance is through diode D 2Afterflow reduces to zero gradually, and the high voltage of avoiding inducting damages the insulated door based transistor.Inversion is overturned Xin Tong Time and is delivered to contactor K 1And K 2Control circuit, make K 1Closure, short circuit rectifier DR input, motor changes constant speed work automatically over to.
The normal Gong Zuo of Zheng Time, the utility model speed regulating device are the same with existing chopped mode cascade speed regulator, and it is constant that the triggering phase shift advance angle β of thyristor inverter TI is fixed on minimum value (about 30 °), and dc inversion voltage is fixed (U DThe ≈ constant), change rotor voltage U after uncontrollable rectifier DR rectification by the duty ratio D that changes boost chopper BC DR
U DR＝(1-D)U D
Realize speed governing.Thyristor inverter TI and transformer TF capacity P TIAnd P TFBy the maximum rotor power output
P R max = 3 ( U R I R ) max
Choose, for blower fan and the load of pump class quadratic form, I R∝ n 2, rotation speed n Gao Time, I RGreatly, U RLittle, P RNot quite; Rotation speed n Di Time, I RLittle, U RGreatly, P RAlso little; Maximum P RAppear at n=(2/3) n 0() Time s=1/3, P R.max=0.15P N, consider that load is not strict quadratic form relation, stay certain abundant putting, get P TI=P TF=(0.2～0.3) P N, with (0.2～0.3) P NThe low pressure inverter of power and transformer control 100%P NThe middle piezoelectricity machine speed governing of power.Because thyristor inverter power is little, and the β angle is fixed on 30 °, and it is idle little that inverter produces, and the governing system total power factor improves many than traditional cascade adjustable-speed system, and the harmonic wave that brings to electrical network is also little.
In realizing speed closed loop control, the control of boost chopper is by speed outer shroud and electric current I DRInterior ring two parts constitute.Because at different rotating speeds (different U DR) under, the duty ratio D of boost chopper and dc inversion voltage U DBetween relation be non-linear, usually, adopt current regulator to realize current inner loop control, the current response difference that causes different rotating speeds to stand erect, regulator parameter is adjusted difficulty.If adopt the current hysteresis ring bang-bang controller realizes current inner loop control, can overcome non-linear effects, but the chopper switches frequency will change with rotation speed change, and when the underloading discontinuous current bang-bang controller cisco unity malfunction.In embodiment of the present utility model, then adopt a kind of new Dian Liu Mine value two point form controller to realize electric current I DRInterior ring control, it both can overcome the non-linear effects of boost chopper, need not to adjust dynamic parameter, and switching frequency is fixed, and also can work during discontinuous current.
With reference to Fig. 4 and Fig. 5, to control in the oscillogram of k switch periods at Dian Liu Mine value two point form, each switch periods zero hour, the triggering input S of R-S trigger FF receives a pulse signal, R-S trigger FF output O exports high level, copped wave pipe V 1Conducting, rectified current I DRIncrease it and control voltage U cAt comparator C P 1In compare,
U c = I * + Δ U c
ΔU c = T 2 L DR ( U D - U DR ) ( 1 - τ T )
In the formula: U DRAnd U DBe respectively commutating voltage and dc inversion voltage
L DRIt is rectifying and wave-filtering inductance value (containing the motor leakage inductance)
I *It is the electric current set-point
T is a switch periods
τ is the time in the k switch periods, when t=kT, and τ=0: when t=(k+1) T, τ=T.Work as I DRIncrease to I DR=U cThe time, comparator C P 1Export high level, deliver to the RESET input R of R-S trigger FF, R-S trigger FF resets, copped wave pipe V 1Turn-off, finish until this switch periods.By this method control, electric current I in a switch periods DRMean value equal electric current set-point I *
With reference to Fig. 4, voltage differential signal U D-U DRFrom differential amplifier DA.Clock signal clock delivers to down counter MC, and then the number in counter is 1-τ/T.After the number among the MC reduced to zero, its carry end sent a carry signal, and with its triggering input signal st as R-S trigger FF, MC is back to full position simultaneously, prepares the counting of the next switch periods of beginning.Number among the down counter MC and voltage difference analog signal U D-U DRMultiply each other in the D/A converter, D/A exports through the potentiometer dividing potential drop, if the dividing potential drop coefficient is T/2L DR, then potentiometer is output as signal delta U cΔ U cWith the given signal I of electric current *Addition gets control signal U c, with U cDeliver to comparator C P 1With current signal I DRRelatively, comparator C P 1Output reseting input signal rst to R-S trigger FF.
Embodiment 2:
With reference to Fig. 2, in the present embodiment, motor M is middle pressure internal feedback wire wound asynchronous motor.Its speed regulating device are identical with Fig. 1, and uncontrollable rectifier DR switches through sub-winding by the brush and the slip ring of motor, but thyristor inverter TI meets the auxiliary winding in the motor stator, transless TF.
Embodiment 3:
With reference to Fig. 3, in the present embodiment, motor M is that middle pressure is around the cage brushless double-fed motor.The rotor winding of this motor is not drawn, brushless and slip ring, and two cover stator winding, a cover gets access to grid, and another set of function is equivalent to coiling electric motor rotor winding, meets the uncontrollable rectifier DR of speed regulating device.Speed regulating device are identical with Fig. 1, and thyristor inverter TI gets access to grid by transformer TF.
Embodiment 4:
In the present embodiment, Dian Liu Mine value two point form controller is made of the microprocessor with corresponding processing program.
The advantage of the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection that the utility model provides is:
A. the whole advantages that kept existing chopped mode cascade speed regulator:
● with piezoelectricity machine rotating speed in the control of low pressure speed regulating device.
● inverter TI and transformer TF capacity are little, and for the quadratic form load of blower fan and pump class, they only are 20%～30% of motor power (output).
● because brilliant lock inverter power is little, and the β angle is fixed on 30 °, and it is idle little that inverter produces, and the governing system total power factor improves many than traditional cascade adjustable-speed system, and the harmonic wave that brings to electrical network is also little.
B. set up inversion stalling protection device, the thyristor inverter that solves the existing apparatus existence is overturned the damage equipment problem in electrical network Gu Zhang Time inversion.
C. new Dian Liu Mine value two point form controller is adopted in circular current control in the chopper, is characterized in:
● relatively realize two point form control with electric current Mine value, replace current regulator and duty ratio D generator, be not subjected to the boost chopper non-linear effects, need not to adjust dynamic parameter, easy to use.
● electric current I in a switch periods DRMean value equal electric current set-point I *
● in the underloading electric current I DRDuan Xu Time, the controller endure.

Claims (8)

1. the middle pressure asynchronous motor chopped mode cascade speed regulator that has the inversion stalling protection, comprise be connected in the main circuit link to each other successively by contactor (K 1) and (K 2) control circuit, uncontrollable rectifier (DR), boost chopper (BC) and the thyristor inverter (TI) formed, it is characterized in that:
Also comprise the inversion stalling protection device (IFP) that is connected between described boost chopper (BC) and the described thyristor inverter (TI), described inversion stalling protection device (IFP) is by insulated door based transistor (V 2), fly-wheel diode (D 2) and be used to control described insulated door based transistor (V 2) overcurrent comparator (CP 2) form, the sampled signal of described thyristor inverter (TI) output current is connected to described overcurrent comparator (CP 2) "-" input, overcurrent set point (I *) be connected to described overcurrent comparator (CP 2) "+" input, described overcurrent comparator (CP 2) output signal be connected to described insulated door based transistor (V 2) control end, described insulated door based transistor (V 2) (TI) Bing Tong Time overturns the contactor (K that signal is connected to described control circuit with inversion to the control thyristor inverter 1And K 2);
Wherein, described boost chopper (BC) is provided with Dian Liu Mine value two point form controller, and this controller comprises differential amplifier (DA), D/A converter, down counter (MC), comparator (CP 1) and output trigger (FF), the dc inversion voltage (UD) of main circuit and commutating voltage (UDR) are through the voltage differential signal (U of described differential amplifier (DA) output D-U DR) (1-τ/T) is connected to described D/A converter, the output of described D/A converter (Δ U respectively to the counting of He Time clock signal in described down counter (MC) c) and the given signal (I of electric current *) control signal (U after the addition c) be connected to described comparator (CP 1) "-" input, rectified current signal (I DR) be connected to described comparator (CP 1) "+" input, described comparator (CP 1) reseting input signal (rst) of output is connected to " R " input of described output trigger (FF), the carry signal (st) that described down counter (MC) produces is connected to " S " input of described output trigger (FF), and the triggering signal of described output trigger (FF) output " Q " is connected to the control end of described boost chopper (BC).
2. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 1, wherein said D/A converter is the count value and the voltage differential signal (U of described down counter (MC) D-U DR) multiplier.
3. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 1 and 2, wherein said D/A converter and described comparator (CP 1) between be connected to the voltage divider that constitutes by potentiometer, its dividing potential drop coefficient is T/2L DR
4. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 3, wherein said asynchronous motor is middle pressure conventional wound asynchronous motor.
5. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 3, wherein said asynchronous motor is middle pressure internal feedback wire wound asynchronous motor.
6. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 3, wherein said asynchronous motor is that middle pressure is around the cage brushless double-fed motor.
7. according to claim 4,5,6 described middle pressure asynchronous motor chopped mode cascade speed regulators with inversion stalling protection, the power of wherein said asynchronous motor is greater than 200KW, and middle pressure is 3～10KV.
8. the middle pressure asynchronous motor chopped mode cascade speed regulator with inversion stalling protection according to claim 7, wherein said Dian Liu Mine value two point form controller are replaced and are made of microprocessor.
CN 200520000930 2005-01-17 2005-01-17 Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection Expired - Fee Related CN2765390Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520000930 CN2765390Y (en) 2005-01-17 2005-01-17 Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520000930 CN2765390Y (en) 2005-01-17 2005-01-17 Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection

Publications (1)

Publication Number Publication Date
CN2765390Y true CN2765390Y (en) 2006-03-15

Family

ID=36168304

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200520000930 Expired - Fee Related CN2765390Y (en) 2005-01-17 2005-01-17 Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection

Country Status (1)

Country Link
CN (1) CN2765390Y (en)

Similar Documents

Publication Publication Date Title
EP3292625B1 (en) Wind turbine power generation system
US6954004B2 (en) Doubly fed induction machine
EP1610456B1 (en) Dual mode rectifier, system and method
US6984897B2 (en) Electro-mechanical energy conversion system having a permanent magnet machine with stator, resonant transfer link and energy converter controls
US20070052244A1 (en) Control system for doubly fed induction generator
CN111628660B (en) Compressor variable frequency speed regulating system and control method of direct current bus voltage
CN202889279U (en) Brushless doubly fed motor excitation control device
Chen et al. Current source thyristor inverter and its active compensation system
US6924991B2 (en) Energy transfer multiplexer
CN201656905U (en) Speed regulating system of a slip power feedback type asynchronous motor with large power and medium-high voltage
CN108712093B (en) Power converter of high-speed permanent magnet starter generator and control method thereof
CN110311578B (en) Segmented rectification method for output voltage of motorcycle magneto and voltage regulator
JP2011514798A (en) Power feedback device
Zhang et al. New digital control method for power factor correction
CN2765390Y (en) Chopped mode tandem speed control device for medium voltage asynchronous motor with inversion failure protection
US20140126255A1 (en) System and method of over-voltage protection
CN202841050U (en) Cascaded high-voltage inverter speed regulating system with energy feedback function
CN112769366B (en) Method, device and system for controlling excitation current transformer of electric excitation synchronous motor
CN201869080U (en) Flywheel energy storage motor device with changeable power supply structure
CN108667038A (en) A kind of high pressure SVG of low dash current and the startup method of deicing device
JPS61240829A (en) Operation of pump-up generator motor
CN2805216Y (en) Soft starter for electric motor
Lipo A supersynchronous doubly fed induction generator option for wind turbine applications
CN102142733A (en) Flywheel energy storage motor device with variable power supply structure
CN218897179U (en) Control circuit of single-phase motor

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: GUANGDONG HONOR EAST ENERGY CO., LTD.

Free format text: FORMER OWNER: BEIJING HUANA ORIENTAL ENERGY TECHNOLOGY CO., LTD.

Effective date: 20081017

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20081017

Address after: D101 unit, 11 color road, Guangzhou Science City, Guangdong Province, China: 510663

Patentee after: Guangdong Honor East Power Co., Ltd.

Address before: Beijing, Haidian District Qinghe Yongtai District, East China Beijing Oriental Energy Technology Co., Ltd., zip code: 100000

Patentee before: Huana Dongfang Energy Tech Co., Ltd., Beijing

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20060315

Termination date: 20140117