CN1838522A - Motor operation state controlling method - Google Patents
Motor operation state controlling method Download PDFInfo
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- CN1838522A CN1838522A CNA2005100560786A CN200510056078A CN1838522A CN 1838522 A CN1838522 A CN 1838522A CN A2005100560786 A CNA2005100560786 A CN A2005100560786A CN 200510056078 A CN200510056078 A CN 200510056078A CN 1838522 A CN1838522 A CN 1838522A
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Abstract
This invention relates to a control method of the motor running state, which checks whether the motor in the generator running state or the electric running state, and computes the output frequency value of the adjusting frequency converter, which makes the direct bus voltage stable and avoids the excess voltage protection, and obtains stable load current, and shortens the decelerate parking time.
Description
Technical field
The present invention relates to a kind of control method of motor running control method, particularly a kind of motor operation state.
Background technology
Along with the application of power electronics is universal day by day, the use of frequency converter is very extensive.Please refer to Fig. 1, when making deceleration control for the frequency converter CD-ROM drive motor, the schematic diagram of the corresponding output frequency value of its dc bus voltage waveform.When motor carries out deceleration control; its rise energy causes dc bus voltage 10 to rise; therefore; exceed overvoltage stall when preventing to detect level 11 at dc bus voltage 10; frequency converter needs output frequency value 12 is kept one section retention time 12a, does not do any deceleration control action, is returned to (promptly to be lower than overvoltage stall and to prevent to detect level 11) in the safe range up to dc bus voltage 10 and continues deceleration control again; avoiding dc bus voltage 10 too high, and cause overvoltage protection.So continuous deceleration and the result that constant speed keeps, making motor is 12b deceleration time that the retention time 12a of multistage adds multistage deceleration time, has also elongated the time of motor deceleration.And, in order to consume that Yin Mada is in the generator operation state and the rise energy that produces, present way has two kinds, wherein a kind of mode is for to feed back to power end with the rise energy via circuit, to do regeneration, but the higher circuit that this kind mode often needs is built and is set to this, so generally all utilize another kind of mode: promptly in equipment, install brake unit or brake resistance additional, to consume the rise energy, to be set to this more aforementioned method that feeds back to power end low though it is built, but still installation cost and maintenance that must be extra be also not satisfactory.
Therefore, how to provide a kind of method, become one of researcher's problem to be solved according to the control of motor operation state do.
Summary of the invention
In view of above problem, main purpose of the present invention is to provide a kind of control method of motor operation state, by detecting motor operation state, adjust the output frequency value of frequency converter, the rise energy that consumption produces in the generator state because of motor running, to save or to reduce the installed capacity of brake unit or brake resistance, reach the purpose that reduces cost.
For achieving the above object, the invention provides a kind of control method of motor operation state, it adjusts the output frequency value of a frequency converter, and with the operating condition of control motor, this control method includes following step: the operating condition that detects a motor; When this motor was a generator operation state, adjusting this output frequency value was a first frequency value; Making this motor according to this first frequency value running, is a motorrun state with this operating condition that changes this motor; When motor was this motorrun state, adjusting this output frequency value was a second frequency adjusted value; And make this motor according to this second frequency value running.
This first frequency value adds a frequency adjustment amount for this output frequency value.
When this frequency adjustment amount was negative value, this motor was this generator operation state.
This frequency adjustment amount be on the occasion of the time, this motor is this motorrun state.
This frequency adjustment amount is the difference calculating gained that prevents to detect level value according to a direct current bus voltage value and an overvoltage stall.
This second frequency value adds a frequency adjustment amount for this output frequency value.
This frequency adjustment amount is to calculate gained according to a setting-up time that quickens.
This frequency adjustment amount is to calculate gained according to a setting-up time that slows down.
That is to say that the control method of motor operation state of the present invention comprises the following steps:
At first, detect motor and be in generator operation state or motorrun state; When motor was in motorrun state, frequency converter was according to quickening or deceleration setting-up time calculated rate adjustment amount.
When motor was in the generator operation state, frequency converter was according to dc bus voltage value calculated rate adjustment amount, its medium frequency adjustment amount distinguish have on the occasion of with negative value.
When the frequency adjustment amount be on the occasion of the time, will make motor change into motorrun state by the generator operation state, avoid dc bus voltage continue to rise and consume earlier before the rise energy that produces in the generator state because of motor running.
Control method by this motor operation state, by detecting motor operation state, the corresponding frequency converter output frequency value of adjusting, the rise energy that consumption produces in the generator state because of motor running, so as to saving or reduce the installed capacity of brake unit or brake resistance, reach the purpose that reduces cost, and reduce the size of dc bus ripple voltage and obtain more stable load current.
About feature of the present invention and embodiment, existing conjunction with figs. is described in detail as follows as most preferred embodiment.
Description of drawings
Fig. 1 is that the dc bus voltage of the motor of prior art when slowing down contrasts schematic diagram with the frequency converter output frequency value;
Fig. 2 is a motor operation state controlled step flow chart of the present invention;
Fig. 3 A is the waveform modelling schematic diagram of prior art;
The waveform modelling schematic diagram that Fig. 3 B the present invention is carried; And
Fig. 4 is a system block diagrams of the present invention.
Wherein, description of reference numerals is as follows:
10-dc bus voltage;
The stall of 11-overvoltage prevents to detect level;
12-output frequency value;
12a-retention time;
12b-deceleration time;
13-load current;
20-frequency converter;
30-running controller;
40-motor;
50-load;
F1-output frequency value;
F2-running control frequency value;
T1-deceleration time;
T2-deceleration time;
The output frequency value of step 100-detection frequency converter and output voltage and current value;
Step 101-judge whether motor is the generator operation state at present;
Step 102-according to dc bus voltage value calculated rate adjustment amount;
The output valve of step 103-adjustment frequency converter is the first frequency value;
The Time Calculation frequency adjustment amount that step 104-foundation is quickened or slowed down and set;
The output valve of step 105-adjustment frequency converter is the second frequency value;
Step 106-whether stop motor running.
Embodiment
Please refer to Fig. 2, operational flowchart for running control of the present invention, at first, detect output frequency value and the output voltage and the current value (step 100) of frequency converter, to judge whether motor is generator operation state (step 101) at present, if motor is in the generator operation state at present, energy rise problem is promptly arranged, then prevent that according to dc bus voltage value and an overvoltage stall difference that detects level value from calculating corresponding frequency adjustment amount (step 102).
Next, the output frequency value of adjusting frequency converter is a first frequency value (step 103), wherein the first frequency value is that the output frequency value of frequency converter adds the upper frequency adjustment amount, and the frequency adjustment amount calculates according to the difference that dc bus voltage value and an overvoltage stall prevent to detect level value, and have according to result of calculation on the occasion of the frequency adjustment amount or the frequency adjustment amount of negative value.When the frequency adjustment amount be on the occasion of the time, will make motor change into motorrun state by the generator operation state, avoid dc bus voltage continue to rise and consume earlier before the rise energy that produces in the generator state because of motor running.
If motor is not the generator operation state, promptly represent motor to be in motorrun state, i.e. noenergy rise problem, and according to the Time Calculation frequency adjustment amount (step 104) that quickens or slow down and set.
Next, the output frequency value of adjusting frequency converter is a second frequency value (step 105), wherein the second frequency value is that the output frequency value of frequency converter adds the upper frequency adjustment amount, and the frequency adjustment amount calculates according to the setting-up time of setting-up time that quickens or deceleration.After step 103 and step 105, all judge whether to stop motor running (step 106), in the time of need remaining in operation as if motor, then get back to step 100, to continue to do motor running control.
Please refer to Fig. 3 A and Fig. 3 B, be respectively prior art and waveform modelling schematic diagram of the present invention.In Fig. 3 A, can find dc bus voltage 10 because of slowing down or load change makes motor be in the generator state, and the problem that produce power is gone up, so cause the waviness of dc bus voltage 10 big.Therefore, for avoiding dc bus voltage 10 too high, need when dc bus voltage 10 prevents to detect level 11 greater than overvoltage stall (with reference to Fig. 1), output frequency value 12 be maintained; When dc bus voltage 10 prevents to detect level 11 less than overvoltage stall, carry out the deceleration control of output frequency value 12.Because whole moderating process need avoid dc bus voltage 10 too high, so deceleration time, T1 was longer, its load current 13 rises and falls with dc bus voltage 10 and causes variation very big.Please refer to Fig. 3 B, when the detection motor is the generator operation state, calculate and adjust the output frequency value 12 of frequency converter immediately, change into motorrun state with the control motor by the generator operation state, to avoid dc bus voltage 10 to continue to rise and to consume the energy of rise, so can find that output frequency value 12 there is no the stage of maintenance, therefore T2 deceleration time (about 6.34 seconds) is short than T1 deceleration time (about 6.60 seconds), and the waveform of dc bus voltage 10 is also more steady, and its load current 13 is also more stable.
Please refer to Fig. 4, be system block diagrams of the present invention, in frequency converter 20, be provided with running controller 30, when frequency converter 20 output frequency value are f1, by running controller 30 output frequency value f1, with CD-ROM drive motor 40 runnings, when load 50 changes or deceleration, frequency converter 20 is according to magnitude of voltage and the output voltage and the current value of dc bus, judge that motor 40 is in the generator operation state at present, calculate and the controller 30 output running control frequency value f2 that pass through to turn round, and then allow motor 40 change into motorrun state by the generator operation state, so, can consume Yin Mada 40 and be in the generator operation state and produce the rise energy, avoid causing dc bus voltage to continue to rise, in addition, running controller 30 also can be arranged at the outside of frequency converter 20, does not influence its operating function.
Control method by this motor operation state, by detecting the operating condition of motor, the corresponding output frequency value of adjusting frequency converter, to avoid motor in slowing down or being in the generator operation state during load change and problem that produce power is gone up, more stable and obtain more stable load unsteady flow so as to making dc bus voltage, and shorten the time that motor slows down.
Though the present invention discloses as above with aforesaid preferred embodiment; but it is not in order to limit the present invention; any familiar alike operator; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, therefore scope of patent protection of the present invention must be looked this specification appending claims and is as the criterion.
Claims (8)
1. the control method of a motor operation state, it adjusts the output frequency value of a frequency converter, and with the operating condition of control motor, this control method includes following step:
Detect the operating condition of a motor;
When this motor was a generator operation state, adjusting this output frequency value was a first frequency value;
Making this motor according to this first frequency value running, is a motorrun state with this operating condition that changes this motor;
When motor was this motorrun state, adjusting this output frequency value was a second frequency adjusted value; And
Make this motor according to this second frequency value running.
2. control method as claimed in claim 1 is characterized in that this first frequency value adds a frequency adjustment amount for this output frequency value.
3. control method as claimed in claim 2 is characterized in that when this frequency adjustment amount is negative value this motor is this generator operation state.
4. control method as claimed in claim 2, it is characterized in that this frequency adjustment amount on the occasion of the time, this motor is this motorrun state.
5. control method as claimed in claim 2 is characterized in that this frequency adjustment amount is the difference calculating gained that prevents to detect level value according to a direct current bus voltage value and an overvoltage stall.
6. control method as claimed in claim 1 is characterized in that this second frequency value adds a frequency adjustment amount for this output frequency value.
7. control method as claimed in claim 6 is characterized in that this frequency adjustment amount is to calculate gained according to a setting-up time that quickens.
8. control method as claimed in claim 6 is characterized in that this frequency adjustment amount is to calculate gained according to a setting-up time that slows down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100560786A CN1838522A (en) | 2005-03-23 | 2005-03-23 | Motor operation state controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100560786A CN1838522A (en) | 2005-03-23 | 2005-03-23 | Motor operation state controlling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1838522A true CN1838522A (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100560786A Pending CN1838522A (en) | 2005-03-23 | 2005-03-23 | Motor operation state controlling method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867337A (en) * | 2010-03-08 | 2010-10-20 | 韦增机械(佛山高明)有限公司 | Intelligent braking method for knitting machine |
| CN102931889A (en) * | 2012-10-29 | 2013-02-13 | 江苏仁源电气有限公司 | Anti-overvoltage-stall control method for variable frequency drive systems |
| CN103227605A (en) * | 2012-11-01 | 2013-07-31 | 东方日立(成都)电控设备有限公司 | Control method for preventing overvoltage of high-voltage frequency converter with fan load during speed reduction process |
| CN105337556A (en) * | 2014-08-15 | 2016-02-17 | 先驰（无锡）数控装备有限公司 | Improved-type frequency converter for gang saw machine |
| CN107836077A (en) * | 2015-07-09 | 2018-03-23 | 三菱电机株式会社 | Control device of electric motor |
-
2005
- 2005-03-23 CN CNA2005100560786A patent/CN1838522A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867337A (en) * | 2010-03-08 | 2010-10-20 | 韦增机械(佛山高明)有限公司 | Intelligent braking method for knitting machine |
| CN101867337B (en) * | 2010-03-08 | 2014-07-09 | 韦增机械(佛山高明)有限公司 | Intelligent braking method for knitting machine |
| CN102931889A (en) * | 2012-10-29 | 2013-02-13 | 江苏仁源电气有限公司 | Anti-overvoltage-stall control method for variable frequency drive systems |
| CN103227605A (en) * | 2012-11-01 | 2013-07-31 | 东方日立(成都)电控设备有限公司 | Control method for preventing overvoltage of high-voltage frequency converter with fan load during speed reduction process |
| CN105337556A (en) * | 2014-08-15 | 2016-02-17 | 先驰（无锡）数控装备有限公司 | Improved-type frequency converter for gang saw machine |
| CN107836077A (en) * | 2015-07-09 | 2018-03-23 | 三菱电机株式会社 | Control device of electric motor |
| CN107836077B (en) * | 2015-07-09 | 2020-07-07 | 三菱电机株式会社 | Motor control device |
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