CN207939421U - A kind of high-voltage frequency converter absolute position harvester - Google Patents
A kind of high-voltage frequency converter absolute position harvester Download PDFInfo
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- CN207939421U CN207939421U CN201721919099.0U CN201721919099U CN207939421U CN 207939421 U CN207939421 U CN 207939421U CN 201721919099 U CN201721919099 U CN 201721919099U CN 207939421 U CN207939421 U CN 207939421U
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- frequency converter
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Abstract
The utility model discloses a kind of high-voltage frequency converter absolute position harvesters, including AC/DC power modules (1), parallel interface (2), CPLD signal processing circuits (3) and differential output circuit (4).AC/DC power modules (1) are 220 input of exchange, 5V, 24V and isolation 5V outputs, and wherein 5V is that device itself is powered, and 24V powers for encoder (10), and isolation 5V powers for differential output circuit (4)；Parallel interface (2) receives the position signal of encoder (10) by schmitt inverter；CPLD signal processing circuits (3) convert the parallel signal of encoder (10) to Serial output；Differential output circuit (4) is light-coupled isolation difference output, sends PWM Generator High Voltage Inverter Control System (20) to.The device receives the signal that processing has the absolute value encoder of 16 bit resolution parallel ports output, by position signal and turn the processing gone here and there, the anti-interference for substantially increasing acquisition signal, simultaneously because making system cost decrease as main process task chip using CPLD.
Description
Technical field
The utility model belongs to industrial electric transmission and frequency converter equipment technical field, more particularly to a kind of high-voltage frequency converter
High precision position signal pickup assembly.
Background technology
Current high performance high-voltage frequency converter control algolithm mainly has velocity sensor vector controlled and speed sensorless
Device vector controlled.For the relatively high occasion of the industry requirements control accuracy such as mine, metallurgy, main selection has velocity sensor arrow
Amount controls, and the location information for the encoder acquisition motor installed on motor, collected location information sends control system to, controls
Then it is compared by system processed according to the rotating speed of the positional information calculation motor of motor with given value, carry out speed closed loop
Control.Therefore, the precision and real-time of location information acquisition are the key that realize velocity close-loop control.If directly according to coding
Device acquires the rotating speed of the positional information calculation motor of motor, the problem of being easy to be interfered by external environment, add real-time,
High-precision can not calculate has velocity vector control algolithm medium velocity, reduces the control accuracy of motor control.
The purpose of this utility model is to provide a kind of high-voltage frequency converter absolute position harvesters, for solving motor position
Set the problem that being interfered property and real-time difference are easy in gatherer process.
Utility model content
First technical solution of the utility model is a kind of high-voltage frequency converter absolute position harvester, it is characterised in that packet
It includes：AC/DC power modules (1), parallel interface (2), CPLD signal processing circuits (3) and differential output circuit (4), AC/
DC power module (1) receives exchange input, after AC/DC is converted, powers for device itself, and is difference output electricity after isolation
Road (4) powers,
Parallel interface (2) receives the parallel position signal that encoder (10) exports, and is sent after schmitt inverter
Enter CPLD signal processing circuits (3), CPLD signal processing circuits (3) complete parallel input and are converted into Serial output, described serial
It is input to high-voltage frequency converter (20) by the differential output circuit (4).
Second technical solution is based on the first technical solution, which is characterized in that the CPLD signal processing circuits (3) are this dress
The core set, processing chip are CPLD chips, and serial signal baud rate is 2.5M, with verifying work(before and after same frame data
Energy.
Third technical solution be based on the second technical solution, which is characterized in that the differential output circuit (4) by optocoupler every
Turn 485 level chip circuits composition from part and TTL, realizes that data isolation, TTL turn 485 level chip electricity by light-coupled isolation
Realize that long range signals reliably transmit in road.
4th technical solution is based on third technical solution, which is characterized in that the AC/DC power modules (1) are also described
Encoder (10) provides power supply.
5th technical solution is based on any technical solution in first to fourth, which is characterized in that encoder (10) it is every
One signal is all made of push-pull circuit, and pull-up resistor is provided on the parallel interface (2), by pulling up electricity
Hinder the level that the high level clamper for exporting encoder (10) is needed to the CPLD signal processing circuits (3).
Description of the drawings
Attached drawing only for the purpose of illustrating preferred embodiments, rather than limitations of the present invention.In entire attached drawing
In, the same reference numbers will be used to refer to the same parts.
Fig. 1 is the structural schematic diagram of high-voltage frequency converter absolute position harvester.
Specific implementation mode
In order to keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in detail in case.
High-voltage frequency converter absolute position harvester is placed in inside the grey etui of a 21cm*12.5cm*7cm,
There are three external terminal bases for box：Encoder seat, communication seat and power socket.Encoder seat and the output of absolute value encoder 10 are believed
Number end connection, communication seat are connect with the control terminal of PWM Generator High Voltage Inverter Control System 20, and the power supply of power socket and alternating current 220V connects.
Whole device is made of one piece of board, as shown in Figure 1, board circuit part include AC/DC power modules 1, it is parallel
Interface circuit 2, CPLD signal processing circuits 3 and differential output circuit 4.It is defeated that AC/DC power modules 1 receive alternating current 220V power supply
Enter, exports 5V, 24V and isolation 5V.Wherein 5V device itself is powered, and 24V powers for parallel port absolute value encoder 10, and 5V is isolated
It powers for differential output circuit 4.
Parallel interface 2 receives the signal of 10 parallel port of absolute value encoder output, is then sent by schmitt inverter
Enter CPLD signal processing circuits 3 to be handled.CPLD signal processing circuits 3 mainly complete parallel signal and turn rs 232 serial interface signal output
Function, differential output circuit 4 be used for enhance signal transmission reliability, Transistor-Transistor Logic level is converted into differential signal, is sent to
PWM Generator High Voltage Inverter Control System 20.
As shown in Figure 1, the position signal of absolute value encoder 10 is connected to parallel interface 2, due to the letter of each
Number it is made of push-pull circuit, the high level of output is the 24V of encoder power supply, so being set in parallel interface part
A pull-up resistor is set, voltage clamping to 5V.
In the present embodiment, the processing chip of CPLD signal processing circuits 3 is ALTERA companies
EPM7128QC100, the abundant I/O port resource having using the processing chip, is circumscribed with source crystal oscillator 10M, and parallel signal is turned
Turn to the function of Serial output.The specific agreement of Serial output is：21,0 (1 represents high level to start bit, and 0 represents low electricity
It is flat), data bit bit0-bit15, data bit bit0-bit15, check bit 1,1, stop position 1 (totally 14).With same frame data
Front and back verifying function.
Differential output circuit 4 mainly turns differential signal circuit by optical coupling isolation circuit and TTL and forms.Light-coupled isolation part is defeated
Outlet is made of RC circuits, and requirement of the different communication baud rates to RC is different.Communication baud rate is in this practical way
2.5M, the resistance value for choosing R are 310 ohm, and the capacitance of C is 15PF.MAX485 is selected in differential level conversion.
The advantages of the utility model and advantageous effect：
The utility model high-voltage frequency converter absolute position harvester, by using CPLD as signal processing core, energy
It is enough that parallel port position signal is converted into higher baud rate by serial ports output, while output interface part uses the electricity of isolating difference
Road form ensures the real-time and high reliability of signal transmission, effectively raises computational accuracy and the speed control of motor speed
The control accuracy of loop processed.
Relative to parallel port signal is directly handled in the past, due to increasing and turning string function, transmitted by isolating difference signal
To PWM Generator High Voltage Inverter Control System 20, system cost is not only reduced, also enhances the anti-interference and real-time of system, is increased
The flexibility of signal processing.
It is one of specific embodiment of the present utility model above, it, can be to each reality in the scope of the utility model
The mode of applying is deformed, these variations belong in the scope of protection of the utility model.
Claims (5)
1. a kind of high-voltage frequency converter absolute position harvester, it is characterised in that including：AC/DC power modules (1), parallel interface
Circuit (2), CPLD signal processing circuits (3) and differential output circuit (4), AC/DC power modules (1) receive exchange input, warp
It after AC/DC conversions, powers for device itself, and powers for differential output circuit (4) after isolation,
Parallel interface (2) receives the parallel position signal that encoder (10) exports, and is sent into after schmitt inverter
CPLD signal processing circuits (3), CPLD signal processing circuits (3) complete parallel input and are converted into Serial output, described serial logical
It crosses the differential output circuit (4) and is input to high-voltage frequency converter (20).
2. a kind of high-voltage frequency converter absolute position harvester according to claim 1, which is characterized in that the CPLD letters
Number processing circuit (3) is the core of the present apparatus, and processing chip is CPLD chips, and serial signal baud rate is 2.5M, and band is same
Verifying function before and after one frame data.
3. a kind of high-voltage frequency converter absolute position harvester according to claim 2, which is characterized in that the difference is defeated
Go out circuit (4) to be made of light-coupled isolation part and TTL turns of 485 level chip circuits, data isolation realized by light-coupled isolation,
TTL turns 485 level chip circuits and realizes that long range signals reliably transmit.
4. a kind of high-voltage frequency converter absolute position harvester according to claim 3, which is characterized in that the AC/DC
Power module (1) is also that the encoder (10) provides power supply.
5. a kind of high-voltage frequency converter absolute position harvester according to any one of claim 1 to 4, feature exist
In the signal of each of encoder (10) is all made of push-pull circuit, and pull-up is provided on the parallel interface (2)
Resistance is needed by the high level clamper that pull-up resistor exports encoder (10) to the CPLD signal processing circuits (3)
Level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721919099.0U CN207939421U (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage frequency converter absolute position harvester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721919099.0U CN207939421U (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage frequency converter absolute position harvester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207939421U true CN207939421U (en) | 2018-10-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721919099.0U Active CN207939421U (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage frequency converter absolute position harvester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207939421U (en) |
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2017
- 2017-12-29 CN CN201721919099.0U patent/CN207939421U/en active Active
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