CN110572084A - Motor control method based on frequency converter - Google Patents
Motor control method based on frequency converter Download PDFInfo
- Publication number
- CN110572084A CN110572084A CN201910883065.8A CN201910883065A CN110572084A CN 110572084 A CN110572084 A CN 110572084A CN 201910883065 A CN201910883065 A CN 201910883065A CN 110572084 A CN110572084 A CN 110572084A
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- CN
- China
- Prior art keywords
- motor
- frequency converter
- control method
- controller
- alternating current
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
The invention discloses a motor control method based on a frequency converter, which comprises a motor drive control method and a motor stop control method; the motor driving control method is that a controller firstly drives an alternating current contactor coil corresponding to a certain motor to be started to be electrified, after a main contact of the alternating current contactor is closed, the controller sends a driving signal to a frequency converter, the frequency converter outputs voltage and sends the voltage to the motor through the alternating current contactor, and the motor starts to operate; the motor stop control method is that the controller firstly sends a stop signal to the frequency converter, the frequency converter stops outputting a voltage signal, the controller then drives an alternating current contactor coil corresponding to a certain motor to be stopped to power off, a main contact of the alternating current contactor is disconnected, and the motor is stopped. The invention controls the starting and stopping of the frequency converter and the motor alternating current contactor through the controller, and avoids the problem that the frequency converter is damaged due to the arc phenomenon to influence the normal use of the motor.
Description
Technical Field
The invention relates to the field of motor control methods, in particular to a motor control method based on a frequency converter.
Background
With the continuous improvement of the modernization technology level, the frequency converter is widely applied to automatic control equipment, in order to reduce the cost, one frequency converter is adopted to control one or more motors, the motors are not necessarily started at the same time, and an alternating current contactor is required to be added between the frequency converter and the motors for control. In the ordinary control process, the control system gives an operation command to the frequency converter and the alternating current contactor generator at the same time, and under the driving or stopping state of the frequency converter, because the main contact of the alternating current contactor can generate electric arcs in the suction or release process, the energy of the electric arcs is large and far exceeds the maximum current and voltage upper limits allowed by the output port of the frequency converter, so that the frequency conversion output fault is caused, the stop is generated, and unnecessary loss and trouble are caused to production work.
Disclosure of Invention
the invention aims to solve the technical problem of providing a motor control method based on a frequency converter, which can avoid the problem that the frequency converter is damaged due to an electric arc phenomenon and the normal use of a motor is influenced by controlling the starting and stopping of the frequency converter and a motor alternating current contactor through a controller.
the technical scheme of the invention is as follows:
A motor control method based on a frequency converter is characterized in that a plurality of motors are provided, each motor is connected with the frequency converter through a corresponding alternating current contactor, and the frequency converter and the alternating current contactor of each motor are connected with a controller; the motor control method comprises a motor drive control method and a motor stop control method; the motor driving control method is characterized in that a controller firstly drives an alternating current contactor coil corresponding to a certain motor to be started to be electrified, after a main contact of the alternating current contactor is closed, the controller sends a driving signal to a frequency converter, the frequency converter outputs voltage and sends the voltage to the motor through the alternating current contactor, and the motor starts to operate; the motor stop control method is characterized in that a controller firstly sends a stop signal to a frequency converter, the frequency converter stops outputting a voltage signal, the controller drives an alternating current contactor coil corresponding to a certain motor to be stopped to be powered off, a main contact of the alternating current contactor is disconnected, and the motor is stopped.
And the analog input port of the frequency converter is connected with the analog output port of the controller.
The utility model discloses a motor, including the AC contactor of every motor, the one end of its coil of AC contactor be connected with the one end of the normally closed contact of corresponding relay, the other end of its coil of AC contactor, the other end that corresponds the normally closed contact of relay are connected with power supply respectively, the both ends that correspond the relay coil all be connected with the controller, its main contact of AC contactor of every motor establish ties between the voltage output port of converter and the power input port of motor.
The controller is a microcontroller or a programmable controller.
The invention has the advantages that:
In the process of controlling the frequency converter with one driving and multiple driving, the problem of frequency converter fault shutdown caused by overlarge current and voltage of the output port of the frequency converter in the process of driving or stopping the motor is avoided, and the normal work of the frequency converter is ensured; the controller of the invention can arbitrarily control the output of the corresponding alternating current contactor or the alternating current contactor combination according to the use requirement of the motor, does not stop, and ensures the normal use of the motor.
Drawings
Fig. 1 is a block diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a motor control method based on a frequency converter includes a motor driving control method and a motor stopping control method; the motors 4 are connected with the frequency converter 2 through corresponding alternating current contactors 3, and the frequency converter 2 and the alternating current contactors 3 of the motors 4 are connected with the controller 1 (a microcontroller or a programmable controller); the motor driving control method is that a controller firstly drives a coil of an alternating current contactor 3 corresponding to a certain motor 4 to be started to be electrified, after a main contact of the alternating current contactor 3 is closed, an analog output port of the controller 1 sends a driving signal to an analog input port of a frequency converter 2, the frequency converter 2 outputs voltage and sends the voltage to the motor 4 through the alternating current contactor 3, and the motor 4 is started to operate; the motor stop control method is that an analog quantity output port of the controller 1 firstly sends a stop signal to an analog quantity input port of the frequency converter 2, the frequency converter 2 stops outputting a voltage signal, the controller 1 drives a coil of the alternating current contactor 3 corresponding to a certain motor 4 to be stopped to be powered off, a main contact of the alternating current contactor 3 is disconnected, and the motor 4 is stopped.
One end of a coil of the alternating current contactor 3 of each motor 4 is connected with one end of the normally closed contact of the corresponding relay, the other end of the coil of the alternating current contactor 3 and the other end of the normally closed contact of the corresponding relay are respectively connected with a power supply, two ends of the coil of the corresponding relay are connected with the controller 1, and a main contact of the alternating current contactor 3 of each motor is connected between a voltage output port of the frequency converter 2 and a power input port of the motor 4 in series. Namely, the controller 1 controls the coil of the alternating current contactor 3 to be electrified through the relay, and the main contact of the alternating current contactor 3 is closed, so that the circuit between the frequency converter 2 and the motor 4 is conducted to realize the driving of the motor 4.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A motor control method based on a frequency converter is characterized in that: the system comprises a plurality of motors, a frequency converter, a controller and a controller, wherein each motor is connected with the frequency converter through a corresponding alternating current contactor; the motor control method comprises a motor drive control method and a motor stop control method; the motor driving control method is characterized in that a controller firstly drives an alternating current contactor coil corresponding to a certain motor to be started to be electrified, after a main contact of the alternating current contactor is closed, the controller sends a driving signal to a frequency converter, the frequency converter outputs voltage and sends the voltage to the motor through the alternating current contactor, and the motor starts to operate; the motor stop control method is characterized in that a controller firstly sends a stop signal to a frequency converter, the frequency converter stops outputting a voltage signal, the controller drives an alternating current contactor coil corresponding to a certain motor to be stopped to be powered off, a main contact of the alternating current contactor is disconnected, and the motor is stopped.
2. The frequency converter-based motor control method according to claim 1, wherein: and the analog input port of the frequency converter is connected with the analog output port of the controller.
3. The frequency converter-based motor control method according to claim 1, wherein: the utility model discloses a motor, including the AC contactor of every motor, the one end of its coil of AC contactor be connected with the one end of the normally closed contact of corresponding relay, the other end of its coil of AC contactor, the other end that corresponds the normally closed contact of relay are connected with power supply respectively, the both ends that correspond the relay coil all be connected with the controller, its main contact of AC contactor of every motor establish ties between the voltage output port of converter and the power input port of motor.
4. The frequency converter-based motor control method according to claim 1, wherein: the controller is a microcontroller or a programmable controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883065.8A CN110572084A (en) | 2019-09-18 | 2019-09-18 | Motor control method based on frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910883065.8A CN110572084A (en) | 2019-09-18 | 2019-09-18 | Motor control method based on frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110572084A true CN110572084A (en) | 2019-12-13 |
Family
ID=68781025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910883065.8A Pending CN110572084A (en) | 2019-09-18 | 2019-09-18 | Motor control method based on frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110572084A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201374667Y (en) * | 2009-03-04 | 2009-12-30 | 北京北玻安全玻璃有限公司 | Multi-motor frequency conversion switching control system |
| CN101645684A (en) * | 2009-09-21 | 2010-02-10 | 卧龙电气集团股份有限公司 | Variable frequency speed regulation branch control device of high-frequency vibration motor |
| CN201523348U (en) * | 2009-09-21 | 2010-07-07 | 卧龙电气集团股份有限公司 | Variable frequency speed regulation system of dither motor |
| CN203368383U (en) * | 2013-07-23 | 2013-12-25 | 中冶焦耐工程技术有限公司 | Variable frequency one-drive-four control system for scraper plate choke placing machine |
-
2019
- 2019-09-18 CN CN201910883065.8A patent/CN110572084A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201374667Y (en) * | 2009-03-04 | 2009-12-30 | 北京北玻安全玻璃有限公司 | Multi-motor frequency conversion switching control system |
| CN101645684A (en) * | 2009-09-21 | 2010-02-10 | 卧龙电气集团股份有限公司 | Variable frequency speed regulation branch control device of high-frequency vibration motor |
| CN201523348U (en) * | 2009-09-21 | 2010-07-07 | 卧龙电气集团股份有限公司 | Variable frequency speed regulation system of dither motor |
| CN203368383U (en) * | 2013-07-23 | 2013-12-25 | 中冶焦耐工程技术有限公司 | Variable frequency one-drive-four control system for scraper plate choke placing machine |
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| PB01 | Publication | ||
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Application publication date: 20191213 |