CN117856683A - Method for controlling galloping start of asynchronous motor - Google Patents
Method for controlling galloping start of asynchronous motor Download PDFInfo
- Publication number
- CN117856683A CN117856683A CN202410239187.4A CN202410239187A CN117856683A CN 117856683 A CN117856683 A CN 117856683A CN 202410239187 A CN202410239187 A CN 202410239187A CN 117856683 A CN117856683 A CN 117856683A
- Authority
- CN
- China
- Prior art keywords
- frequency
- current
- motor
- galloping
- search
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000004907 flux Effects 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000013598 vector Substances 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Control Of Ac Motors In General (AREA)
- Motor And Converter Starters (AREA)
Abstract
The disclosure relates to an asynchronous motor galloping start control method, comprising the following steps: the preparation stage: starting a frequency converter, increasing the rotor current amplitude from 0 until the rotor current amplitude is stabilized at the galloping search current amplitude, and setting the stator current frequency as the galloping starting highest search frequency; constant current frequency conversion quick search stage: keeping the current amplitude of the galloping search unchanged, reducing the stator current frequency from the highest searching frequency of the galloping start, judging whether the slip estimated value of the asynchronous motor is smaller than a slip threshold value, wherein the slip estimated value or the current stator current frequency meets a preset condition, and ending the stage; flux linkage observation stage: keeping the rotor current amplitude and the stator current frequency unchanged, waiting for convergence of the flux linkage/rotating speed observer, and further determining the motor rotor frequency and the motor air gap magnetic flux; and a galloping switching stage: the control mode is switched according to the motor rotor frequency and the motor air gap flux. The method and the device can improve the starting performance of the asynchronous motor and realize the control of the asynchronous motor in different initial states.
Description
Technical Field
The disclosure relates to the field of power electronics and motor control, in particular to a galloping start control method for an asynchronous motor.
Background
The traditional method comprises the following steps: 1) The V/F curve comparison method for constant electric current input by the stator winding comprises the following steps: the implementation method is that the stator is always kept constant command current when the frequency is searched, the output voltage of the frequency converter is compared with the voltage value on the V/F curve calibrated by the motor, and the voltage frequency of the electronic winding is consistent with the frequency of the rotor when the output voltage of the frequency converter is equal to the voltage value on the V/F curve calibrated by the motor. The method needs to calibrate the V/F curve of the motor under specific current in advance, has large workload, and has large influence on the result by the measurement accuracy of the stator voltage vector. 2) Direct current bus minimum current method: according to the realization method, the motor slip is 0 when the speed of a stator rotating magnetic field is the same as the speed of a motor rotor, and the output power of the motor is 0 at the moment, so that the DC bus current of the frequency converter is minimum, and the rotor frequency is indirectly detected by detecting the DC bus current. This method is affected by ripple current on the bus, and the search accuracy is limited. 3) Torque current minimization method: and adding a constant-voltage variable-frequency voltage vector to the stator winding to search the frequency of the motor rotor, and when the speed of the stator rotating magnetic field is the same as the rotating speed of the motor, enabling the torque current component to be about zero, thereby obtaining the frequency of the rotor. The output current is uncontrollable in the searching process of the method, and the problem of overcurrent exists and segmentation is needed. (patent number: CN 109302102A) 4) motor reactance estimation method: and searching the rotor frequency of the motor by using a constant-current frequency conversion method, wherein the reactance of the motor is maximum when the rotor frequency is consistent with the stator voltage frequency. This approach requires additional motor line voltage sampling circuitry. (patent number: CN 213879680U) 5) motor back electromotive force frequency calculation method: the motor rotor frequency is obtained by detecting the remanence in the motor rotor or the counter potential frequency generated by the magnetic field generated by the externally input exciting voltage. This method can only be operated normally in the case of a large residual magnetism of the motor rotor or with an additional excitation circuit, and requires an additional motor line voltage acquisition circuit.
Under the condition of different initial rotating speeds of the motor rotor, the low-frequency voltage of the frequency converter can generate impact current to cause overcurrent faults of the frequency converter; under the condition of overlarge slip, the convergence of an asynchronous motor rotor position estimation algorithm is reduced, the starting time is obviously increased, the starting capability of the motor is reduced, an additional hardware circuit is possibly required, and the safe and reliable operation of the system cannot be ensured.
Disclosure of Invention
The disclosure provides an asynchronous motor galloping start control method, which solves at least one of the following technical problems: (1) Under the condition of different initial rotating speeds of the motor rotor, the low-frequency voltage of the frequency converter can generate impact current to cause overcurrent faults of the frequency converter; (2) Under the condition of overlarge slip, the convergence of an asynchronous motor rotor position estimation algorithm is reduced, the starting time is obviously increased, the starting capability of the motor is reduced, an additional hardware circuit is possibly required, and the safe and reliable operation of the system cannot be ensured.
The embodiment of the disclosure provides a galloping start control method of an asynchronous motor, comprising the following steps:
the preparation stage: starting a frequency converter, increasing the current amplitude of a rotor from 0 according to a preset slope rate until the current amplitude is stabilized in the galloping search current, wherein the stator current frequency is set to be the highest galloping start search frequency;
constant current frequency conversion quick search stage: keeping the current amplitude of the galloping search unchanged, descending the stator current frequency from the highest search frequency of the galloping start according to the search frequency, judging whether the slip estimated value of the asynchronous motor is smaller than a slip threshold value or not, and ending the constant current variable frequency quick search stage until the slip estimated value is smaller than the slip threshold value or the current stator current frequency is lower than the preset lowest search frequency;
flux linkage observation stage: keeping the rotor current amplitude and the stator current frequency unchanged at the end of the constant-current variable-frequency quick search stage, waiting for convergence of the flux linkage/rotating speed observer, and further determining the motor rotor frequency and the motor air gap magnetic flux;
and a galloping switching stage: switching a control mode according to the motor rotor frequency and the motor air gap magnetic flux;
when the frequency of the motor rotor is not higher than the lowest switching frequency of the constant-current variable-frequency control mode to the magnetic field vector closed-loop control mode, switching to the constant-current variable-frequency control mode for operation; when the frequency of the motor rotor is higher than the lowest switching frequency of the constant-current variable-frequency control mode to the magnetic field vector closed-loop control mode, detecting whether the motor air gap magnetic flux is greater than a rotor magnetic flux threshold value, switching to the magnetic field vector closed-loop control mode if the motor air gap magnetic flux is greater than the threshold value, otherwise, increasing exciting current until the motor air gap magnetic flux is greater than the threshold value, and switching to the magnetic field vector closed-loop control mode to operate.
Optionally, the determining whether the slip estimation value of the asynchronous motor is smaller than the slip threshold value includes: and calculating the active power and the power factor of the asynchronous motor through the stator voltage vector and the stator current vector, and further judging whether the slip estimated value in the process of reducing the stator current frequency is smaller than a slip threshold value.
Compared with the prior art, the beneficial effects of the present disclosure are:
according to the method for controlling the galloping start of the asynchronous motor, under the working conditions of different initial motor speeds, the impact current of the frequency converter can be reduced, the motor starting capacity under the working conditions is improved, the system reliability is improved, meanwhile, the implementation of software is easy, any hardware circuit is not added, and the method has high engineering application value.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the technical aspects of the disclosure.
FIG. 1 illustrates a simplified flow chart of an asynchronous motor galloping start control method according to an embodiment of the present disclosure;
fig. 2 shows a flowchart of step S10 in an asynchronous motor galloping start control method according to an embodiment of the present disclosure;
fig. 3 shows a flowchart of steps S20 and S30 in an asynchronous motor galloping start control method according to an embodiment of the present disclosure;
fig. 4 shows a flowchart of step S40 in an asynchronous motor galloping start control method according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.
Furthermore, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order not to obscure the present disclosure.
It can be understood that the above embodiments of the method for controlling the start of the galloping of the asynchronous motor according to the present disclosure may be combined with each other to form a combined embodiment without violating the principle logic, which is limited in space and not repeated in this disclosure.
The normal starting method of the conventional asynchronous motor starting method is to adopt zero frequency to start outputting alternating voltage with variable frequency, so as to realize variable voltage variable frequency control (VVF) of the motor. In the starting mode, under the condition that the motor rotor has an initial rotating speed, the low-frequency voltage of the frequency converter can generate impact current to cause overcurrent faults of the frequency converter; the voltage frequency output by the inverter is lower than the frequency of a motor rotor, so that the motor enters a power generation mode, and the long-time power generation mode operation can cause overvoltage faults of the two-quadrant frequency converter; under the condition of overlarge slip, the convergence of an asynchronous motor rotor position estimation algorithm is reduced, and the starting time is obviously increased. Based on the technical problem of the disclosure, a special galloping starting algorithm of the asynchronous motor needs to be designed to cope with the starting working condition that the rotor of the asynchronous motor has an initial rotating speed.
Based on the thought, the disclosure provides a galloping start control method of an asynchronous motor. The method is divided into four stages: the method comprises a preparation stage, a constant-current variable-frequency quick search stage, a flux linkage observation stage and a galloping switching stage. In the constant-current variable-frequency quick search stage, variable-frequency search current with constant amplitude is input into the stator, and the rotor frequency range is quickly positioned by detecting parameters such as input voltage, power factors, apparent power and the like of the motor. And further acquiring accurate motor rotor frequency according to the flux linkage observer result in the flux linkage observation stage. And in the galloping switching stage, a follow-up control strategy is flexibly selected according to the working condition of the motor, when the frequency converter detects that the air gap magnetic flux of the motor is larger than the rotor magnetic flux threshold value, a magnetic field vector closed-loop control mode (FOC mode) is switched in, and if the condition cannot be met, the frequency converter enters a constant current frequency conversion control mode (CCVF mode) according to the current working condition to perform open-loop operation.
Fig. 1 shows a flowchart of an asynchronous motor galloping start control method according to an embodiment of the present disclosure. As shown in fig. 1, the method for controlling the galloping start of the asynchronous motor comprises the following steps: step S10: the preparation stage: starting a frequency converter, increasing the current amplitude of a rotor from 0 according to a preset slope rate until the current amplitude is stabilized in the galloping search current, wherein the stator current frequency is set to be the highest galloping start search frequency; step S20: constant current frequency conversion quick search stage: keeping the current amplitude of the galloping search unchanged, descending the stator current frequency from the highest search frequency of the galloping start according to the search frequency, judging whether the slip estimated value of the asynchronous motor is smaller than a slip threshold value, determining the motor rotor frequency range until the slip estimated value is smaller than the slip threshold value or the current stator current frequency is lower than the set lowest search frequency, and ending the constant-current variable-frequency quick search stage; step S30: flux linkage observation stage: keeping the rotor current amplitude and the stator current frequency unchanged at the end of the constant-current variable-frequency quick search stage, waiting for convergence of the flux linkage/rotating speed observer, and further determining the motor rotor frequency and the motor air gap magnetic flux; step S40: and a galloping switching stage: the control mode is switched according to the motor rotor frequency and the motor air gap flux.
The method comprises the following specific steps:
step S10: the preparation stage: starting a frequency converter, increasing the rotor current amplitude from 0 according to a preset slope rate until the rotor current amplitude is stabilized at the galloping search current amplitude, wherein the stator current frequency is set to be the highest galloping start search frequency.
In the embodiment of the disclosure and other possible embodiments, as shown in fig. 2, after the galloping start function is enabled, the power-on self-test of the inverter is completed first, and whether to perform the ASC active short-circuit discharge is determined according to the last inverter working state and the user setting, so as to eliminate the remanence in the motor. Then, the frequency converter is started to perform the soft start of the flying car search: and increasing the rotor current amplitude CurRaef from 0 to the set fly-car searching current amplitude flyback CurRate according to the ramp rate flyback CurRate, wherein the stator current frequency Freq1 is the set fly-car starting highest searching frequency FreqMax, and when the current feedback amplitude is stabilized at the fly-car searching current amplitude flyback CurRaef, the fly-car searching soft starting is completed.
Step S20: constant current frequency conversion quick search stage: and (3) keeping the current amplitude of the galloping search unchanged, descending the stator current frequency from the highest search frequency of the galloping start according to the descending slope of the search frequency, judging whether the slip estimated value of the asynchronous motor is smaller than a slip threshold value or not, and ending the constant-current frequency conversion quick search stage until the slip estimated value or the current stator current frequency meets the preset condition.
In the embodiments of the present disclosure and other possible embodiments, as shown in fig. 3, in the constant-current variable-frequency fast search phase, the set galloping search current amplitude is kept unchanged at the flyCatchCurRef, the stator current frequency Freq1 is output, and the stator current frequency Freq1 is lowered from the galloping start highest search frequency FreqMax according to the search frequency lowering ramp FreqSearchRate.
The judging whether the slip estimation value of the asynchronous motor is smaller than a slip threshold value comprises the following steps: and calculating the active power and the power factor of the asynchronous motor through the stator voltage vector and the stator current vector, and further judging whether the slip estimated value in the process of reducing the stator current frequency is smaller than a slip threshold value.
In embodiments of the present disclosure and other possible embodiments, stator current vectors are used、/>(obtained by stator current sampling feedback IsFbk) and stator voltage vector +.>、/>And calculating a slip estimated value s 'of the asynchronous motor (obtained through a stator voltage command Uscmd), determining a motor rotor frequency range until the slip estimated value s' is smaller than a slip threshold value s_Target or the current stator current frequency Freq1 is lower than a set minimum search frequency FreqMin, and ending a constant-current frequency conversion quick search stage.
Because the slip estimation value of the asynchronous motor is close to 0, the following characteristics are provided: the active power of the asynchronous motor is minimum and the power factor is minimum. Therefore, in the process of reducing the stator current frequency Freq1, the motor active power and the power factor are calculated through the stator voltage vector and the stator current vector so as to obtain a slip estimated value s'.
Wherein the active power and the power factor of the asynchronous motor are determined by the stator voltage vector、/>And stator current vector、/>And (3) calculating to obtain:
in the method, in the process of the invention,in order for the power factor to be a power factor,Pin order for the active power to be available,Qis reactive power +.>And->PWM pulse width estimation by controller bus voltage and last beat output, +.>And->The method comprises the steps of acquiring through a current sensor and then performing clark conversion;
wherein stator current vectors are used、/>Is>、/>Calculating a slip estimation value s' of the asynchronous motor:
in the method, in the process of the invention,for the power factor, k1 is the weight coefficient of the power factor, and k2 is the reactive powerQAnd the weight coefficient of the time t derivative is selected according to the hardware of the controller and the working condition of the motor.
The slip estimation value or the current stator current frequency meets a preset condition, including: and when the motor slip estimated value is smaller than the slip threshold value or the stator current frequency is lower than the preset minimum search frequency, determining the motor rotor frequency range, and ending the constant current frequency conversion quick search stage.
The specific process is as follows: judging whether the slip estimation value s' is smaller than a slip threshold value s_target, if so, determining the frequency range of the motor rotor at the moment, and ending the constant-current variable-frequency quick search stage; if not, continuing to judge whether the current stator current frequency Freq1 is lower than the set minimum search frequency FreqMin, determining the frequency range of the motor rotor at the moment when the current stator current frequency Freq1 is lower than the set minimum search frequency FreqMin, and ending the constant current frequency conversion quick search stage.
Step S30: flux linkage observation stage: and keeping the rotor current amplitude and the stator current frequency at the end of the constant-current variable-frequency quick search stage unchanged, waiting for convergence of the flux linkage/rotating speed observer, and further determining the motor rotor frequency and the motor air gap magnetic flux.
In embodiments of the present disclosure and other possible embodiments, after the motor rotor frequency range is determined in the constant current variable frequency fast search phase, the flux linkage/rotation speed observer observes the motor rotor frequency Freq and the motor air gap magnetic flux Psi, waiting for the flux linkage/rotation speed observer to converge, further determining the motor rotor frequency Freq and the motor air gap magnetic flux Psi.
The waiting flux linkage/rotation speed observer converges, comprising: due to the uncertainty of the initial state of the motor, when the slip estimation value meets the preset condition, the stator current frequency Freq1 is close to the motor rotor frequency Freq, so that the flux linkage/rotating speed observer calculates the motor rotor frequency Freq.
Step S40: and a galloping switching stage: the control mode is switched according to the motor rotor frequency and the motor air gap flux.
Further, as shown in fig. 4, according to the motor rotor frequency Freq and the motor air gap magnetic flux Psi obtained in the flux linkage observation stage, judging whether the motor rotor frequency Freq is higher than the lowest switching frequency of switching from the constant current variable frequency control mode (CCVF mode) to the magnetic field vector closed loop control mode (closed loop FOC mode), and switching to the constant current variable frequency control mode (CCVF mode) to operate when the motor rotor frequency is not higher than the lowest switching frequency of switching from the constant current variable frequency control mode (CCVF mode) to the magnetic field vector closed loop control mode (closed loop FOC mode); and when the motor rotor frequency is higher than the lowest switching frequency of switching from a constant current variable frequency control mode (CCVF mode) to a magnetic field vector closed-loop control mode (closed-loop FOC mode), continuously detecting whether the motor air gap magnetic flux is greater than a rotor magnetic flux threshold value, switching to the magnetic field vector closed-loop control mode (closed-loop FOC mode) if the motor air gap magnetic flux is greater than the threshold value, otherwise, increasing the exciting current until the motor air gap magnetic flux is greater than the threshold value, and switching to the magnetic field vector closed-loop control mode (closed-loop FOC mode).
According to the method for controlling the galloping start of the asynchronous motor, which is designed by the embodiment of the disclosure, under the working conditions of different initial motor speeds, the impact current of the frequency converter can be reduced, the motor starting capacity under the working conditions is improved, the system reliability is improved, meanwhile, the implementation of software is easy, any hardware circuit is not added, and the method has high engineering application value.
It will be appreciated by those skilled in the art that in the above-described method for controlling start of runaway of an asynchronous motor according to the present embodiment, the written order of the steps is not meant to imply a strict execution order, but rather should constitute any limitation on the implementation process, and the specific execution order of the steps should be determined by its functions and possible inherent logic.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement of the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (2)
1. The method for controlling the galloping start of the asynchronous motor is characterized by comprising the following steps of:
the preparation stage: starting a frequency converter, increasing the current amplitude of a rotor from 0 according to a preset slope rate until the current amplitude is stabilized in the galloping search current, wherein the stator current frequency is set to be the highest galloping start search frequency;
constant current frequency conversion quick search stage: keeping the current amplitude of the galloping search unchanged, descending the stator current frequency from the highest search frequency of the galloping start according to the search frequency, judging whether the slip estimated value of the asynchronous motor is smaller than a slip threshold value or not, and ending the constant current variable frequency quick search stage until the slip estimated value is smaller than the slip threshold value or the current stator current frequency is lower than the preset lowest search frequency;
flux linkage observation stage: keeping the rotor current amplitude and the stator current frequency unchanged at the end of the constant-current variable-frequency quick search stage, waiting for convergence of the flux linkage/rotating speed observer, and further determining the motor rotor frequency and the motor air gap magnetic flux;
and a galloping switching stage: switching a control mode according to the motor rotor frequency and the motor air gap magnetic flux;
when the frequency of the motor rotor is not higher than the lowest switching frequency of the constant-current variable-frequency control mode to the magnetic field vector closed-loop control mode, switching to the constant-current variable-frequency control mode for operation; when the frequency of the motor rotor is higher than the lowest switching frequency of the constant-current variable-frequency control mode to the magnetic field vector closed-loop control mode, detecting whether the motor air gap magnetic flux is greater than a rotor magnetic flux threshold value, switching to the magnetic field vector closed-loop control mode if the motor air gap magnetic flux is greater than the threshold value, otherwise, increasing exciting current until the motor air gap magnetic flux is greater than the threshold value, and switching to the magnetic field vector closed-loop control mode to operate.
2. The method of claim 1, wherein determining whether the slip estimate for the asynchronous motor is less than a slip threshold comprises: and calculating the active power and the power factor of the asynchronous motor through the stator voltage vector and the stator current vector, and further judging whether the slip estimated value in the process of reducing the stator current frequency is smaller than a slip threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410239187.4A CN117856683B (en) | 2024-03-04 | 2024-03-04 | Method for controlling galloping start of asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410239187.4A CN117856683B (en) | 2024-03-04 | 2024-03-04 | Method for controlling galloping start of asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117856683A true CN117856683A (en) | 2024-04-09 |
| CN117856683B CN117856683B (en) | 2024-05-03 |
Family
ID=90544444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410239187.4A Active CN117856683B (en) | 2024-03-04 | 2024-03-04 | Method for controlling galloping start of asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117856683B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868330A (en) * | 2012-10-24 | 2013-01-09 | 上海新时达电气股份有限公司 | Method for frequency converter to achieve flying start and frequency converter capable of achieving method |
| WO2015131563A1 (en) * | 2014-03-05 | 2015-09-11 | 深圳市海浦蒙特科技有限公司 | Method for controlling flying start of frequency converter |
| CN109302102A (en) * | 2018-10-12 | 2019-02-01 | 中冶赛迪电气技术有限公司 | A kind of frequency converter Fly a car start method |
| CN112234870A (en) * | 2020-10-16 | 2021-01-15 | 武汉科力源电气有限公司 | Method and system for controlling starting of alternating current asynchronous motor during galloping |
| CN114928272A (en) * | 2022-03-07 | 2022-08-19 | 上海辛格林纳新时达电机有限公司 | Frequency converter runaway starting method and frequency converter thereof |
-
2024
- 2024-03-04 CN CN202410239187.4A patent/CN117856683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868330A (en) * | 2012-10-24 | 2013-01-09 | 上海新时达电气股份有限公司 | Method for frequency converter to achieve flying start and frequency converter capable of achieving method |
| WO2015131563A1 (en) * | 2014-03-05 | 2015-09-11 | 深圳市海浦蒙特科技有限公司 | Method for controlling flying start of frequency converter |
| CN109302102A (en) * | 2018-10-12 | 2019-02-01 | 中冶赛迪电气技术有限公司 | A kind of frequency converter Fly a car start method |
| CN112234870A (en) * | 2020-10-16 | 2021-01-15 | 武汉科力源电气有限公司 | Method and system for controlling starting of alternating current asynchronous motor during galloping |
| CN114928272A (en) * | 2022-03-07 | 2022-08-19 | 上海辛格林纳新时达电机有限公司 | Frequency converter runaway starting method and frequency converter thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117856683B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100761928B1 (en) | Self tuning method and apparatus for permanent magnet sensorless control | |
| JP5534935B2 (en) | Rotation sensorless control device | |
| US7944160B2 (en) | Redundant DC bus discharge for an electric motor system | |
| US7501787B2 (en) | Method for controlling AC motor | |
| US9444384B2 (en) | Direct torque control motor controller with transient current limiter | |
| EP3479466B1 (en) | Starting an induction machine | |
| US9407189B2 (en) | Direct torque control motor controller with torque ripple reduction | |
| CN110149080B (en) | Flux weakening control method and device for permanent magnet synchronous motor | |
| EP4068615B1 (en) | System and method for an inverter for self-excitation of an induction machine | |
| WO2012046410A1 (en) | Current control gain adjusting method for pm motor, current control method, and control device | |
| KR100934041B1 (en) | Permanent Magnet Electric Motor Potato Detection Device and Method of Hybrid Electric Vehicle | |
| US9444383B2 (en) | Method for open-loop and closed-loop control of an electromagnetic machine | |
| US20160365811A1 (en) | Control apparatus of synchronous motor | |
| Kerkman et al. | Indirect field-oriented control of an induction motor in the field-weakening region | |
| JP6206505B2 (en) | Motor control device and control method | |
| US20210058019A1 (en) | Compressor and method for controlling the compressor | |
| CN117856683B (en) | Method for controlling galloping start of asynchronous motor | |
| US10014807B2 (en) | System and method for an inverter for self-excitation of an induction machine | |
| US11196373B2 (en) | Control device and control method for synchronous electric motor | |
| Hu et al. | Strategy for restarting the free-running induction motor driven by a high-voltage inverter based on V/f fuzzy control | |
| EP3229364A1 (en) | Inverter | |
| Sayed-Ahmed et al. | Diagnosis of inter-turn short circuit for a polyphase induction motor in closed-loop vector-controlled drives | |
| JP2010068628A (en) | Motor control unit with resistance value compensation function | |
| JP3945324B2 (en) | PG-less vector control device for AC motor | |
| Tao et al. | A restart strategy of a rotating induction machine for inrush current elimination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |