CN109039055A - A kind of control method of motor-drive circuit - Google Patents
A kind of control method of motor-drive circuit Download PDFInfo
- Publication number
- CN109039055A CN109039055A CN201810972360.6A CN201810972360A CN109039055A CN 109039055 A CN109039055 A CN 109039055A CN 201810972360 A CN201810972360 A CN 201810972360A CN 109039055 A CN109039055 A CN 109039055A
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- Prior art keywords
- alternating current
- input
- motor
- voltage
- filtered
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of control methods of motor-drive circuit, comprising steps of the enabled instruction that response user inputs in control platform, input AC electricity；By first filter, the alternating current of input is filtered for the first time；By isolating transformer, first filtered alternating current is isolated；By reactor, to inhibit the harmonic current in the alternating current after isolation；The voltage for the alternating current for exporting, frequency converter in alternating current input converter is tended into specified busbar voltage；The alternating current that frequency converter exports is filtered again by second filter；Motor will be input to by filtered alternating current again.Control method of the invention can guarantee to input the stability of the alternating current of motor, the problem of avoiding voltage fluctuation, and then guarantee the normal operation of motor, the control method of motor-drive circuit efficiently avoids generating interference to power grid simultaneously, reduce the normal work of other electronic equipments and instrument around guaranteeing extraneous electromagnetic interference.
Description
Technical field
The present invention relates to power control technology fields, more particularly to a kind of control method of motor-drive circuit.
Background technique
With power electronic technique and the progress and development that automatically shut down device, variable-frequency control technique has obtained very big hair
Exhibition.And frequency converter is high with speed regulation accuracy with it, effect speed is fast, defencive function is perfect, overload capacity is strong, it is easy to maintain and
It is the advantages that energy saving, gradually expanded and universal.
Currently, generally use alternating current being input to frequency converter in the motor-drive circuit for being currently used for driving motor
In, power frequency supply is converted into the AC power source of various frequencies by frequency converter, thus the variable-speed operation of driving motor.Wherein, become
Frequency device is mainly made of rectification unit, filter unit, inversion unit, control unit etc., is completed by control unit to frequency converter
Whole control, and direct current is converted alternating current to by rectification unit, while pass filtering unit is to the defeated of rectification unit
Smothing filtering is carried out out, then passes through inversion unit for filtered direct current reconvert into alternating current, and export.But work as electricity
When drive circuit is controlled using the above method, very big electromagnetism can be generated to power grid during drive circuit works
Interference, is easy to cause equipment to break down, and can interfere failure to other neighbouring electronic equipments or instrument, leads to it
He can not work normally equipment.
Summary of the invention
The object of the present invention is to provide a kind of control method of motor-drive circuit, it can be effectively prevented from and power grid is generated
Interference, and the stability of output voltage is improved, voltage fluctuation is avoided the problem that, to guarantee the normal operation of equipment.
In order to solve the above technical problem, the present invention provides a kind of control methods of motor-drive circuit, including walk as follows
It is rapid:
The enabled instruction that response user inputs in control platform, input AC electricity；
By first filter, the alternating current of input is filtered for the first time；
By isolating transformer, the first filtered alternating current is isolated, to eliminate in the alternating current
Interference signal；
By reactor, to inhibit the harmonic current in the alternating current after isolation；
By by the alternating current input converter of the reactor, and make the alternating current of the frequency converter output
Voltage tends to specified busbar voltage；
By second filter, the alternating current of frequency converter output is filtered again；
Motor will be input to by the filtered alternating current again, to drive the motor stabilizing to run.
In a kind of embodiment, described by first filter, the alternating current of input is filtered for the first time
Before wave, further comprise the steps of:
Detect the electric current of the alternating current of input；
If detecting, the electric current of the alternating current of input is greater than predetermined current, disconnecting circuit connection；Otherwise, pass through
One filter filters the alternating current of input for the first time.
In a kind of embodiment, the control method of the motor-drive circuit is further comprised the steps of:
By in the alternating current input surge protection device after isolation, the lightning current in the driving circuit is imported big
Ground.
In a kind of embodiment, the control method of the motor-drive circuit is further comprised the steps of:
By in the exchange electrical input socket after isolation, thus for other devices power supply in the driving circuit.
In a kind of embodiment, the voltage of the alternating current for making the frequency converter output tends to specified bus
Voltage, specifically:
Detection inputs the voltage of the alternating current in the frequency converter；
If detecting, the voltage of the alternating current is greater than the specified busbar voltage, reduces the alternating current by capacitor
Voltage, until the voltage of the alternating current tends to the specified busbar voltage；
If detecting, the voltage of the alternating current lower than the specified busbar voltage, increases the alternating current by capacitor
Voltage, until the voltage of the alternating current tends to the specified busbar voltage.
The present invention provides a kind of control method of motor-drive circuit, includes the following steps: to respond user in control platform
The enabled instruction of upper input, input AC electricity；By first filter, the alternating current of input is filtered for the first time；It is logical
Isolating transformer is crossed, the first filtered alternating current is isolated, to eliminate the interference signal in the alternating current；It is logical
Reactor is crossed, to inhibit the harmonic current in the alternating current after isolation；Become being inputted by the alternating current of the reactor
In frequency device, and the voltage of the alternating current of the frequency converter output is made to tend to specified busbar voltage；It is right by second filter
The alternating current of the frequency converter output is filtered again；Motor will be input to by the filtered alternating current again, with driving
The motor stabilizing operation.The motor drive control method of the invention can guarantee to input the steady of the alternating current of the motor
It is qualitative, the problem of avoiding voltage fluctuation, and then ensure that the normal operation of motor, while the control of the motor-drive circuit
Method efficiently avoids generating interference to power grid, reduces to extraneous electromagnetic interference, thus around ensure that other
The normal work of electronic equipment and instrument.
Detailed description of the invention
Fig. 1 is the flow diagram of the control method of the motor-drive circuit in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, a kind of control method of motor-drive circuit of the embodiment of the present invention, wherein the motor driven
Circuit includes first filter, isolating transformer, Surge Protector, socket, reactor, frequency converter and the second filter；
The control method of the motor-drive circuit includes the following steps:
The enabled instruction that S1, response user input in control platform, input AC electricity；
After step S1, and before step S2, further comprise the steps of:
Detect the electric current of the alternating current of input；
If detecting, the electric current of the alternating current of input is greater than predetermined current, disconnecting circuit connection, it is possible to understand that
It is the connection for disconnecting the motor-drive circuit；Otherwise, S2 is entered step.
Wherein, in embodiments of the present invention, can judge whether the electric current of the alternating current of input is big by fuse
In the pre-set current value.Specifically, the alternating current of input is input to fuse；When the alternating current for inputting the fuse
When electric current is greater than the predetermined current, the fuse is disconnected, to disconnect the connection of the motor-drive circuit.When described molten
After interrupter opening, fuse is replaced, then re-execute the steps S1.
S2, pass through first filter, the alternating current of input is filtered for the first time；
Specifically, the alternating current of input is input in the first filter, to realize the exchange to input
Electricity is filtered.
S3, pass through isolating transformer, the first filtered alternating current is isolated, to eliminate in the alternating current
Interference signal；
Wherein, by the isolating transformer, the first filtered alternating current is isolated, it specifically, will be first
The secondary filtered alternating current is input to the isolating transformer, by the electromagnetic induction principle of the isolating transformer, every
The electric current of primary side and secondary side from the isolating transformer, so that the primary side of the isolating transformer and secondary side
It is electrical completely insulated, to eliminate the interference signal in the alternating current, and play the role of pressure resistance and earth leakage protective, into
And it ensure that the stability of the alternating current of the secondary side of the isolating transformer.
In addition, being further comprised the steps of: after step S3
By in the alternating current input surge protection device after isolation, the lightning current in the driving circuit is imported big
Ground.By the Surge Protector, the lightning current in the driving circuit is imported into the earth and is risen, to the effect of surge protection, prevented
The problem of only driving circuit is by broken by lightning.
After step S3, further comprise the steps of:
By in the exchange electrical input socket after isolation, thus for other devices power supply in the driving circuit.
S4, the harmonic current in the alternating current by reactor, after being isolated with inhibition；
Specifically, the alternating current after being isolated by the isolating transformer is input in the reactor, thus
The harmonic current in the alternating current after inhibiting isolation.
S5, by by the alternating current input converter of the reactor, and make the exchange of the frequency converter output
The voltage of electricity tends to specified busbar voltage；
Wherein, in step s 5, the voltage of the alternating current for making the frequency converter output tends to specified bus electricity
Pressure, even if the voltage of the alternating current of frequency converter output is close or equal to the specified busbar voltage；Specifically:
Detection inputs the voltage of the alternating current in the frequency converter；
If detecting, the voltage of the alternating current is greater than the specified busbar voltage, reduces the alternating current by capacitor
Voltage, until the alternating current voltage described in tend to specified busbar voltage；
If detecting, the voltage of the alternating current lower than the specified busbar voltage, increases the alternating current by capacitor
Voltage, until the voltage of the alternating current tends to the specified busbar voltage.
If detecting, the voltage of the alternating current tends to the specified busbar voltage, enters step S6.
S6, pass through second filter, the alternating current of frequency converter output is filtered again；
Specifically, the alternating current that the transformer exports is input in the second filter, is filtered by described second
Wave device filters the alternating current of frequency converter output again, to inhibit spoke caused by the frequency converter itself
Blackberry lily is disturbed, it is ensured that the stability of output voltage.
S7, motor will be input to by the filtered alternating current again, to drive the motor stabilizing to run.
To sum up, the present invention provides a kind of control method of motor-drive circuit, includes the following steps: that responding user is controlling
The enabled instruction inputted on platform, input AC electricity；By first filter, the alternating current of input is filtered for the first time
Wave；By isolating transformer, the first filtered alternating current is isolated, to eliminate the letter of the interference in the alternating current
Number；By reactor, to inhibit the harmonic current in the alternating current after isolation；It will be defeated by the alternating current of the reactor
Enter in frequency converter, and the voltage of the alternating current of the frequency converter output is made to tend to specified busbar voltage；Pass through the second filtering
Device filters the alternating current of frequency converter output again；Motor will be input to by the filtered alternating current again, with
The motor stabilizing is driven to run.The motor drive control method of the invention can guarantee to input the alternating current of the motor
Stability, the problem of avoiding voltage fluctuation, and then ensure that the normal operation of motor, while the motor-drive circuit
Control method efficiently avoids generating interference to power grid, reduces to extraneous electromagnetic interference, therefore ensure that surrounding
The normal work of other electronic equipments and instrument.
The above is embodiments of the present invention, it is noted that for those skilled in the art,
Without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement should also regard
For protection scope of the present invention.
Claims (5)
1. a kind of control method of motor-drive circuit, which comprises the steps of:
The enabled instruction that response user inputs in control platform, input AC electricity；
By first filter, the alternating current of input is filtered for the first time；
By isolating transformer, the first filtered alternating current is isolated, to eliminate the interference in the alternating current
Signal；
By reactor, to inhibit the harmonic current in the alternating current after isolation；
By by the alternating current input converter of the reactor, and make the voltage of the alternating current of the frequency converter output
Tend to specified busbar voltage；
By second filter, the alternating current of frequency converter output is filtered again；
Motor will be input to by the filtered alternating current again, to drive the motor stabilizing to run.
2. the control method of motor-drive circuit as described in claim 1, which is characterized in that pass through the first filtering described
Device further comprises the steps of: before filter for the first time to the alternating current of input
Detect the electric current of the alternating current of input；
If detecting, the electric current of the alternating current of input is greater than predetermined current, disconnecting circuit connection；Otherwise, pass through the first filter
Wave device filters the alternating current of input for the first time.
3. the control method of motor-drive circuit as described in claim 1, which is characterized in that described by the way that transformation is isolated
The first filtered alternating current is isolated in device, further includes step after eliminating the interference signal in the alternating current
It is rapid:
By in the alternating current input surge protection device after isolation, the lightning current in the driving circuit is imported into the earth.
4. the control method of motor-drive circuit as described in claim 1, which is characterized in that described by the way that transformation is isolated
The first filtered alternating current is isolated in device, further includes step after eliminating the interference signal in the alternating current
It is rapid:
By in the exchange electrical input socket after isolation, thus for other devices power supply in the driving circuit.
5. the control method of motor-drive circuit as described in claim 1, which is characterized in that described to export the frequency converter
The voltage of the alternating current tend to specified busbar voltage, specifically:
Detection inputs the voltage of the alternating current in the frequency converter；
If detecting, the voltage of the alternating current is greater than the specified busbar voltage, and the electricity of the alternating current is reduced by capacitor
Pressure, until the voltage of the alternating current tends to the specified busbar voltage；
If detecting, the voltage of the alternating current lower than the specified busbar voltage, increases the electricity of the alternating current by capacitor
Pressure, until the voltage of the alternating current tends to the specified busbar voltage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972360.6A CN109039055A (en) | 2018-08-23 | 2018-08-23 | A kind of control method of motor-drive circuit |
| CN201910772487.8A CN110365222A (en) | 2018-08-23 | 2019-08-21 | A kind of new drive circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972360.6A CN109039055A (en) | 2018-08-23 | 2018-08-23 | A kind of control method of motor-drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109039055A true CN109039055A (en) | 2018-12-18 |
Family
ID=64628343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810972360.6A Pending CN109039055A (en) | 2018-08-23 | 2018-08-23 | A kind of control method of motor-drive circuit |
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| Country | Link |
|---|---|
| CN (1) | CN109039055A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798122A (en) * | 2019-10-08 | 2020-02-14 | 广东美的白色家电技术创新中心有限公司 | Motor system and household electrical appliance |
| CN114024391A (en) * | 2020-12-09 | 2022-02-08 | 卧龙电气驱动集团股份有限公司 | Motor and electric device provided with same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355175A (en) * | 2011-09-14 | 2012-02-15 | 无锡艾柯威科技有限公司 | Brake control method for induction motor |
| CN206389289U (en) * | 2016-11-28 | 2017-08-08 | 浙江省特种设备检验研究院 | A kind of frequency transformer for elevator for possessing reactance voltage disturbance function |
| CN107947531A (en) * | 2017-11-22 | 2018-04-20 | 深圳市库马克新技术股份有限公司 | A kind of Medical power control circuit for meeting EMC and safety standard |
-
2018
- 2018-08-23 CN CN201810972360.6A patent/CN109039055A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355175A (en) * | 2011-09-14 | 2012-02-15 | 无锡艾柯威科技有限公司 | Brake control method for induction motor |
| CN206389289U (en) * | 2016-11-28 | 2017-08-08 | 浙江省特种设备检验研究院 | A kind of frequency transformer for elevator for possessing reactance voltage disturbance function |
| CN107947531A (en) * | 2017-11-22 | 2018-04-20 | 深圳市库马克新技术股份有限公司 | A kind of Medical power control circuit for meeting EMC and safety standard |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798122A (en) * | 2019-10-08 | 2020-02-14 | 广东美的白色家电技术创新中心有限公司 | Motor system and household electrical appliance |
| CN114024391A (en) * | 2020-12-09 | 2022-02-08 | 卧龙电气驱动集团股份有限公司 | Motor and electric device provided with same |
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Application publication date: 20181218 |