CN110262360A - Frequency converter simulator and analogy method - Google Patents
Frequency converter simulator and analogy method Download PDFInfo
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- CN110262360A CN110262360A CN201910619755.2A CN201910619755A CN110262360A CN 110262360 A CN110262360 A CN 110262360A CN 201910619755 A CN201910619755 A CN 201910619755A CN 110262360 A CN110262360 A CN 110262360A
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- 238000004891 communication Methods 0.000 claims abstract description 22
- 238000013500 data storage Methods 0.000 claims abstract description 16
- 230000007257 malfunction Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims 1
- 238000004088 simulation Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The present invention relates to a kind of frequency converter simulator and analogy methods, simulator includes microcontroller, the first RS485 communicating circuit, the 2nd RS485 communicating circuit, data storage circuitry, digital input circuit and toggle switch circuit, first RS485 communicating circuit, the 2nd RS485 communicating circuit and data storage circuitry respectively with microcontroller two-way communication link, the output end of digital input circuit accesses microcontroller, and the output end of toggle switch circuit accesses microcontroller.Analogy method includes building tandem circuit and running frequency converter virtual program on the circuit, which includes multiple working conditions, signal parameter and the status word of frequency converter.Simulator of the invention for substituting true frequency converter and electric control system communication connection in laboratory environments, electric control system can send control instruction to simulator and receive frequency converter status information, therefore can easily realize the debugging to electric control system.
Description
Technical field
The present invention relates to it is a kind of debugged for electric control system when for substituting the simulator of true frequency converter
With corresponding analogy method, belong to converter technology field.
Background technique
In industrial control field, generally require to build hardware platform progress electric control system (embedded system or PLC
System) with the combined debugging of frequency converter, control function of the aptitude test electric control system to frequency converter.Electric control system is logical
Frequency converter is often controlled by bus communication, such as coalcutter electric control system sends control using RS485 or CAN bus and refers to
Frequency converter is enabled, and receives the status data of frequency converter transmission.However, since frequency converter is past for electric control system
It is larger toward volume, it is generally not easy to translator operation in laboratory conditions.
Summary of the invention
The present invention is intended to provide a kind of frequency converter simulator and analogy method, true for substitution in laboratory environments
Frequency converter can easily be realized to electric control system by the way that frequency converter simulator to be connect with electric control system
Debugging.
Main technical schemes of the invention have:
A kind of frequency converter simulator, comprising:
Microcontroller is used as software virtual platform；
First RS485 communicating circuit, for being connect with electric control system, as external communication interface；
2nd RS485 communicating circuit, the converter parameter for remote transmission user configuration；
Data storage circuitry, for storing the converter parameter of user configuration；
Digital input circuit is used for analog mechanical band-type brake control sequential；
The first RS485 communicating circuit, the 2nd RS485 communicating circuit and data storage circuitry respectively with the microcontroller
The output end of device two-way communication link, the digital input circuit accesses the microcontroller.
The frequency converter simulator can also include toggle switch circuit, and it is master and slave to be switched fast frequency converter for user
The output end of machine configuration, the toggle switch circuit accesses the microcontroller.
The frequency converter simulator can also include indicator light circuit, for showing communication state, system running state,
The input terminal of the indicator light circuit connects the microcontroller.
The microcontroller is built-in with frequency converter virtual program, and the virtual program includes multiple work shapes of frequency converter
State, several signal parameters and several status words are the frequency conversion by the data that the first RS485 communicating circuit exports
The virtual data that device virtual program is calculated.
The working condition of the virtual program adoption status machine working principle analog inverter, the working condition are at least wrapped
Include halted state, starting is not ready to state, malfunction, starting illegal state, prepares starting state, prepares operating status, fortune
Row enabled state, accelerates permission state and operating status at output permission state.
The signal parameter includes at least motor speed, frequency, electric current, torque, output power, output voltage, centre directly
Galvanic electricity pressure and temperature.
The status word includes at least control word, status word, faulty word and warning word.
A kind of frequency converter analogy method: building tandem circuit, and frequency converter virtual program, mould are run on the tandem circuit
Multiple working conditions, signal parameter and the status word of frequency converter are drawn up, the tandem circuit includes microcontroller, the first RS485
Communicating circuit, the 2nd RS485 communicating circuit, data storage circuitry and digital input circuit, the first RS485 communication electricity
Respectively with the microcontroller two-way communication link, the digital quantity is defeated for road, the 2nd RS485 communicating circuit and data storage circuitry
The output end for entering circuit accesses the microcontroller, the virtual program include frequency converter multiple working conditions, several
Signal parameter and several status words are the virtual journey of the frequency converter by the data that the first RS485 communicating circuit exports
The virtual data that sequence is calculated.
The multiple working condition includes at least halted state, starting is not ready to state, shape is forbidden in malfunction, starting
State prepares starting state, prepares operating status, operation enabled state, output permission state, accelerates permission state and operation shape
State, the signal parameter include at least motor speed, frequency, electric current, torque, output power, output voltage, middle dc voltage
And temperature, the status word include at least control word, status word, faulty word and warning word.
The beneficial effects of the present invention are:
Frequency converter simulator of the invention can establish real-time communication with electric control system.Electric control system can
With normal operating frequency converter simulator, such as start, accelerate, slow down, invert, stop etc., and the shape of frequency converter simulator
State information and status word real-time change can reach 90% with the similarity of true frequency converter runtime data.
Since the performance of frequency converter is usually indifferent in the electric control system debugging under laboratory condition, it is only necessary to frequency converter
Output data can be provided for electric control system.Therefore true frequency converter is replaced using frequency converter simulator of the invention,
Make electric control system driving frequency converter simulator operation, not only solves the inconvenience of translator operation, but also make electrical control
System debug becomes easier, effective, economical.
Detailed description of the invention
Fig. 1 is the structural block diagram of one embodiment of the tandem circuit of frequency converter simulator of the invention；
Fig. 2 is systematic schematic diagram when being debugged using the present invention to coalcutter electric control system；
Fig. 3 is the software flow pattern of frequency converter analogy method of the invention.
Appended drawing reference: 1, microcontroller；2, the first RS485 communicating circuit；3, the 2nd RS485 communication circuit；4, dial-up is opened
Powered-down road；5, data storage circuitry；6, indicator light circuit；7, digital input circuit；8, power circuit；9, shell；11, electrical
Control system；12, frequency converter simulator；13, RS485 communicating circuit；14, RS485 communicating circuit；15, control word, control refer to
It enables；16, status word, status information.
Specific embodiment
The invention discloses a kind of frequency converter simulators, as shown in Figure 1, including microcontroller 1, the first RS485 communication
Circuit 2, the 2nd RS485 communicating circuit 3, data storage circuitry 5 and digital input circuit 7, the first RS485 communication electricity
Respectively with the microcontroller two-way communication link, the digital quantity is defeated for road, the 2nd RS485 communicating circuit and data storage circuitry
The output end for entering circuit accesses the microcontroller.
The microcontroller 1 is the core of the device, controls other all circuits communicated with and cooperates.Frequency converter
The simulation of each working method, state mainly pass through software realization, the virtual frequency converter simulated is the combination of software and hardware.
As the carrier of software, the frequency converter simulator passes through RS485 bus and electric control system communication, electric control system
Control instruction is sent to frequency converter simulator, passes through RS485 bus from frequency converter simulator reception real time status information
Communication is completed.So-called real time status information includes real-time status, status word and working condition, is completed by software.
Two-way RS485 communicating circuit supports Modbus agreement, is disposed as slave station.Wherein the first RS485 communicating circuit 2
For being connect with electric control system (embedded system or PLC system), as the communication port of the frequency converter simulator,
Electric control system sends control instruction to microcontroller by the first RS485 communicating circuit 2 and receives from microcontroller real-time
Status information.2nd RS485 communicating circuit 3 is for configuring parameter, such as acceleration time, deceleration time of frequency converter etc..
Data storage circuitry 5 is for storing user configuration parameter information, such as frequency converter acceleration time, deceleration time etc..
Digital input circuit 7 can be used for inputting the confirmation signal that declutches from electric control system, control for analog mechanical band-type brake
Timing.
The frequency converter simulator can also include toggle switch circuit 4, and the output of the toggle switch circuit terminates
Enter the microcontroller.Toggle switch circuit 4 is used for manual setting frequency converter status information, such as the virtual frequency converter is configured
It is primary transducer still from frequency converter, predominantly user provides the interface for being switched fast the configuration of frequency converter slave, passes through transformation
The virtual frequency converter is identified as host or slave convenient for host computer by interface IP address.
The frequency converter simulator can also include indicator light circuit 6, and the input terminal of the indicator light circuit connects institute
State microcontroller.Indicator light circuit 6 is used to indicate RS485 communications status, system running state etc..
The frequency converter simulator further includes power circuit 8, and the power circuit and other all circuits keep electrical
Connection, provides power supply for other all circuits.
The microcontroller can use microcontroller minimum system, that is, include at least single-chip microcontroller and with single-chip microcontroller respective tube
Oscillating circuit and reset circuit of foot connection etc..
The frequency converter simulator is equipped with shell 9, and each circuit is installed in the shell.
Fig. 2 is shown when being debugged in laboratory conditions using the present invention to coalcutter electric control system 11
System schematic diagram.Coalcutter electric control system 11 and frequency converter simulator 12 are established by RS485 communicating circuit 13 and 14 to be connected
It connects.RS485 communicating circuit 14 that is, in Fig. 12.Electric control system 11 sends control word, control instruction 15, and receives
Status word, the status information 16 of the transmission of frequency converter simulator 12.
The frequency converter simulator passes through the working method of software analog inverter.Adoption status machine work in software design
Make principle, at least design five groundwork states, comprising: halted state, starting are not ready to state, malfunction, starting taboo
Only state and operating status are preferably to be also devised with prepare starting state, prepare operating status, operation enabled state, output
Permission state accelerates five kinds of working conditions of permission state, makes frequency converter simulator closer to true frequency converter.The frequency converter
Simulator includes at least motor speed, frequency, electric current, torque, output power, output electricity by the signal parameter that software is simulated
Pressure, middle dc voltage and temperature etc.；The status word of simulation includes at least control word, status word, faulty word and warning word etc..
Electric control system can be to the preset faulty word of fault simulation status word of frequency converter simulator, frequency converter at this time
Simulator enters malfunction, and starting illegal state is entered after reset.Preparing starting state is the electricity when starting illegal state
After gas control system write-in starting control word, entered by starting illegal state.
Start to default frequency converter output, including motor speed, output according to preset power of motor information under operating status
Frequency, current of electric, motor torque, DC voltage, output voltage output power and environment temperature.Wherein, motor speed, output
Frequency, current of electric, motor torque and output voltage provide after slope is converted according to electric control system given rotating speed, and real
When be superimposed a suitable random number.DC voltage and environment temperature are only superimposed a suitable random number.On its slope
Rising time and fall time can be set, and parameter setting is carried out by debugging mouth, and parameter changes in real time.
Table 1 shows being preferably provided with for the relevant parameter of the frequency converter simulator, through testing, frequency converter simulation dress
Setting being capable of the true frequency converter of preferable simulation.
Table 1: one group of relevant parameter that frequency converter simulator of the invention uses
Note: REF is given speed, is sent to frequency converter simulator by electric control system；RAND is random number；T is
Deceleration time Tdec, t when the stopping of the acceleration time Tacc when starting of setting or setting be received from frequency converter starting or
Start timing when halt instruction to the time experienced at current time, which carrys out self-timer timing, and value range is 0-
T。
Due to adoption status machine working principle, the structure that frequency converter analog simulation is write is further simplified.The present invention can be with
Electric control system is communicated in real time, simulated environment and each status word of true frequency converter, supplemental characteristic it is real-time similar
Degree can reach 90%.
Fig. 3 is an example of the software flow pattern of the frequency converter simulator, shows preferred state switching flow.
MCW is main control word, is sent to the present apparatus by RS485 bus by external electrical control system.MSW is main state word, display
The working condition of current frequency converter simulator, reads for external electrical control system.When electric control system opens traction, answer
Transmission main control word is 0x477, is delayed after 10ms, retransmits 0x47F, can be automatically into operating status if device fault-free.
The circulation condition of above-mentioned ten working conditions is shown in figure.If toggle switch circuit toggles it to ON, i.e. simulated failure state,
Rising edge is detected on software, the position 3 of setting major state word MSW is equal to 1, and the frequency converter simulator enters failure shape
State.
When starting frequency converter, sending main control word to frequency converter simulator is 0x47F, and boot state machine, which sequentially enters, to be opened
It is dynamic to be not ready to state, prepare starting state, prepare operating status, operation enabled state, output permission state, accelerate permission state
And operating status；When stopping frequency converter, sending main control word to frequency converter simulator is 0x47E, i.e. main control word bit 0 is equal to
0 value；In the event of failure, the position 7 for sending main control word is equal to 1 to frequency converter, can reset the failure of frequency converter simulation.
As shown in figure 3, Rule of judgment J1 enters state S10 if toggle is set as ON, setting major state word MSW's
Position 3 is equal to 1；If toggle is set as OFF, enter Rule of judgment J2.
If major state word bit 3 is equal to 1, enter malfunction S11, receives user from the 2nd RS485 telecommunication circuit tune
The preset fault setting faulty word of mouth is tried, if major state word bit 3 is not equal to 1, shows to prohibit without fault simulation into starting
Only state S1.
Under malfunction, Rule of judgment J10 is executed, if main control word MCW bit7 is equal to 1, shows electric control system
It performs and resets frequency converter operation, then enter starting illegal state S1, otherwise terminate, into next circulation.
Start under illegal state, if main control word bit 0 is equal to 1, is not ready to state into starting, otherwise enters and stop
State S9.Under halted state, calculation method simulation when by the stopping calculates signal parameter.
Starting is not ready under state, executes Rule of judgment J4, if main control word MCW&0x406 is equal to 0x406, is entered
Prepare starting state S3, otherwise terminates, into next circulation.
Prepare under starting state, execute Rule of judgment J5, if main control word MCW&0x407 is equal to 0x407, enters standard
Standby operating status S4, otherwise terminates, into next circulation.
Prepare under operating status, execute Rule of judgment J6, if main control word MCW&0x40F is equal to 0x40F, enters fortune
Row enabled state S5, otherwise terminates, into next circulation.
It runs under enabled state, executes Rule of judgment J7, if main control word MCW&0x41F is equal to 0x41F, enter defeated
Allow state S6 out, otherwise terminates, into next circulation.
It exports under permission state, executes Rule of judgment J8, if main control word MCW&0x43F is equal to 0x43F, enters and add
Fast permission state S7, otherwise terminates, into next circulation.
Accelerate under permission state, execute Rule of judgment J9, if main control word MCW&0x47F is equal to 0x47F, enters fortune
Row state S8, otherwise terminates, into next circulation.
Under operating status, signal parameter analogy method when according to the starting, analog signal parameter.
The invention also discloses a kind of electric control systems to the test method of Frequency Converter Control performance, and this method needs are taken
The necessary tandem circuit of frequency converter simulator is built, and runs frequency converter virtual program on the tandem circuit, simulates change
Multiple working conditions, signal parameter and the status word of frequency device realize complete frequency converter simulator by software and hardware combining, i.e.,
Virtual frequency converter, to replace true frequency converter to participate in test.Using RS485 communicating circuit in electric control system and frequency conversion
Foundation communication connection between device simulator, the control word sent by electric control system to frequency converter simulator, control
Instruction and received status word and status information from frequency converter simulator, evaluate and test the electric control system to frequency conversion
The control performance of device.
This method can meet well electric control system under laboratory condition to the test of Frequency Converter Control performance and
Commissioning requirements eliminate the inconvenience of true frequency converter translator operation, save lab space, reduce in debugging and test
Energy consumption, it is also simpler in operation, flexibly.
Emphasis is gone back in above-mentioned test method and embodies frequency converter analogy method, which needs to build frequency conversion
The necessary tandem circuit of device simulator, and frequency converter virtual program is run on the tandem circuit, simulate frequency converter
Multiple working conditions, signal parameter and status word.The tandem circuit is as shown in Figure 1, logical including microcontroller, the first RS485
News circuit, the 2nd RS485 communicating circuit, data storage circuitry and digital input circuit, the first RS485 communicating circuit,
2nd RS485 communicating circuit and data storage circuitry respectively with the microcontroller two-way communication link, the digital quantity input
The output end of circuit accesses the microcontroller.The virtual program includes multiple working conditions of frequency converter, several letters
Number parameter and several status words are the frequency converter virtual program by the data that the first RS485 communicating circuit exports
The virtual data being calculated.Electric control system acquisition is the virtual data.
The tandem circuit further includes toggle switch circuit, and the output end of the toggle switch circuit accesses the microcontroller
Device.Can be switched fast virtual frequency converter by the toggle switch circuit is primary transducer or from frequency converter, to meet pair
The simulation respectively of the master and slave frequency converter of coalcutter.
The working condition includes at least: malfunction, starting illegal state, halted state, starting be not ready to state and
Operating status further preferably includes preparing starting state, preparing operating status, operation enabled state, output permission state, accelerate to permit
Perhaps state, circulation condition can be found in Fig. 3 between each state.The signal parameter include at least motor speed, frequency, electric current, torque,
Output power, output voltage, middle dc voltage and temperature etc..The status word includes at least control word, status word, faulty word
With warning word etc..
The details such as the conversion of structure, working condition about tandem circuit, the calculating of signal parameter, can refer to aforementioned frequency conversion
The related description of device simulator.
Claims (10)
1. a kind of frequency converter simulator characterized by comprising
Microcontroller is used as software virtual platform；
First RS485 communicating circuit, for being connect with electric control system, as external communication interface；
2nd RS485 communicating circuit, the converter parameter for remote transmission user configuration；
Data storage circuitry, for storing the converter parameter of user configuration；
Digital input circuit is used for analog mechanical band-type brake control sequential；
The first RS485 communicating circuit, the 2nd RS485 communicating circuit and data storage circuitry are double with the microcontroller respectively
To communication connection, the output end of the digital input circuit accesses the microcontroller.
2. frequency converter simulator as described in claim 1, it is characterised in that: further include toggle switch circuit, be used for user
It is switched fast the configuration of frequency converter slave, the output end of the toggle switch circuit accesses the microcontroller.
3. frequency converter simulator as claimed in claim 2, it is characterised in that: it further include indicator light circuit, it is logical for showing
The input terminal of fast state, system running state, the indicator light circuit connects the microcontroller.
4. frequency converter simulator as claimed in claim 1,2 or 3, it is characterised in that: the microcontroller is built-in with frequency conversion
Device virtual program, the virtual program include multiple working conditions, several signal parameters and several states of frequency converter
Word, the data exported by the first RS485 communicating circuit are the virtual data that the frequency converter virtual program is calculated.
5. frequency converter simulator as claimed in claim 4, it is characterised in that: the virtual program adoption status machine work is former
Manage analog inverter working condition, the working condition include at least halted state, starting be not ready to state, malfunction,
Start illegal state, prepares starting state, prepare operating status, operation enabled state, output permission state, accelerate permission state
And operating status.
6. frequency converter simulator as claimed in claim 4, it is characterised in that: the signal parameter includes at least motor speed
Degree, frequency, electric current, torque, output power, output voltage, middle dc voltage and temperature.
7. frequency converter simulator as claimed in claim 4, it is characterised in that: the status word includes at least control word, shape
State word, faulty word and warning word.
8. frequency converter simulator as claimed in claim 6, it is characterised in that: the real output value of the signal parameter uses
Formula in following table is calculated:
Wherein, REF is given speed, is sent to frequency converter simulator by electric control system, RAND is random number, and T is to set
Deceleration time Tdec when the stopping of acceleration time Tacc or setting when fixed starting, t are to receive starting from frequency converter or stop
Start timing to the time experienced at current time when only instructing, value range is 0-T.
9. a kind of frequency converter analogy method, which is characterized in that build tandem circuit, and run frequency converter void on the tandem circuit
Quasi- program, simulates multiple working conditions, signal parameter and the status word of frequency converter, the tandem circuit include microcontroller,
First RS485 communicating circuit, the 2nd RS485 communicating circuit, data storage circuitry and digital input circuit, described first
RS485 communicating circuit, the 2nd RS485 communicating circuit and data storage circuitry respectively with the microcontroller two-way communication link,
The output end of the digital input circuit accesses the microcontroller, and the virtual program includes multiple work of frequency converter
State, several signal parameters and several status words are the change by the data that the first RS485 communicating circuit exports
The virtual data that frequency device virtual program is calculated.
10. frequency converter analogy method as claimed in claim 9, it is characterised in that: the multiple working condition, which includes at least, stops
Only state, starting be not ready to state, malfunction, starting illegal state, prepare starting state, prepare operating status, operation make
Can state, output permission state, accelerate permission state and operating status, the signal parameter include at least motor speed, frequency,
Electric current, torque, output power, output voltage, middle dc voltage and temperature, the status word include at least control word, state
Word, faulty word and warning word.
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| CN113595565B (en) * | 2021-07-29 | 2022-11-29 | 四川省大见通信技术有限公司 | Micro-distribution equipment supporting remote frequency conversion |
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| CN113759788B (en) * | 2021-09-13 | 2023-08-18 | 安徽国农数据科技有限公司 | Pig farm intelligent wireless ad hoc network environment equipment control system |
| CN114070134A (en) * | 2022-01-05 | 2022-02-18 | 山东汉德自动化控制设备有限公司 | Electric control device of variable frequency drilling machine and control method thereof |
| CN117691751A (en) * | 2024-02-01 | 2024-03-12 | 太重煤机有限公司 | Automatic configuration device and method for parameters of frequency converter of coal mining machine |
| CN117691751B (en) * | 2024-02-01 | 2024-05-14 | 太重煤机有限公司 | Automatic configuration device and method for parameters of frequency converter of coal mining machine |
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