CN207283453U - A kind of drafting unit frequency converter - Google Patents
A kind of drafting unit frequency converter Download PDFInfo
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- CN207283453U CN207283453U CN201720963082.9U CN201720963082U CN207283453U CN 207283453 U CN207283453 U CN 207283453U CN 201720963082 U CN201720963082 U CN 201720963082U CN 207283453 U CN207283453 U CN 207283453U
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- motor
- frequency converter
- circuit
- detection circuit
- central processing
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Abstract
A kind of drafting unit frequency converter is the utility model is related to, including motor, the motor are connected with frequency converter by the rotating speed of Frequency Converter Control motor；The frequency converter includes central processing unit and drive circuit, and the central processing unit is connected with drive circuit, for producing SVPWM waveform signals；The drive circuit drives the motor according to received SVPWM waveform signals, realizes the control to motor.The utility model can realize a wide range of speed governing, so as to meet production requirement.
Description
Technical field
Drawing-off technical field is the utility model is related to, more particularly to a kind of drafting unit frequency converter.
Background technology
Feeding product produces relative displacement to each other by a device, fiber therein, makes fiber continuously, equably
It is distributed on output products length direction, this process is referred to as drafting process, abbreviation drawing-off, which makees drafting system.It is existing
Drafting system be usually driven by common electric machine, and the speed adjustable range of common electric machine is smaller, can not meet to produce need sometimes
Ask.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of drafting unit frequency converter, can realize big
Scope speed governing, so as to meet production requirement.
Technical solution is used by the utility model solves its technical problem：A kind of drafting unit frequency control dress is provided
Put, including motor, the motor are connected with frequency converter by the rotating speed of Frequency Converter Control motor；The frequency converter includes central processing
Device and drive circuit, the central processing unit are connected with drive circuit, for producing SVPWM waveform signals；The drive circuit
The motor is driven according to received SVPWM waveform signals, realizes the control to motor.
The frequency converter further includes serial communication interface circuit, the serial communication interface circuit and the central processing unit
It is connected, is used for realization team control.
The motor is additionally provided with electrical parameter detection circuit, the output of the electrical parameter detection circuit and the input phase of protection circuit
Even, the output of the protection circuit is connected with central processing unit.
The electrical parameter detection circuit includes DC voltage detection circuit, temperature sensing circuit and output current detection circuit,
The DC voltage detection circuit is used for the input voltage for detecting motor；The temperature sensing circuit is used for the temperature for detecting motor
Degree；The output current detection circuit is used for the output current for detecting motor.
The protection circuit is comparison circuit.
Beneficial effect
As a result of above-mentioned technical solution, the utility model compared with prior art, has the following advantages that and accumulates
Pole effect：The utility model is become larger by increasing the speed adjustable range of frequency converter motor, so as to meet production requirement.
Brief description of the drawings
Fig. 1 is the block diagram of the utility model.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It is to be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
Please the appended claims limited range.
The embodiment of the utility model is related to a kind of drafting unit frequency converter, as shown in Figure 1, including motor,
The motor is connected with frequency converter by the rotating speed of Frequency Converter Control motor；The frequency converter includes central processing unit and driving electricity
Road, the central processing unit are connected with drive circuit, for producing SVPWM waveform signals；The drive circuit is according to received
SVPWM waveform signals drive the motor, realize the control to motor.The frequency converter further includes serial communication interface circuit,
The serial communication interface circuit is connected with the central processing unit, is used for realization team control.Wherein, serial communication interface circuit can
To select RS485 serial communication interface circuits.
Wherein, the main thought of Frequency conversion control technology (referred to as " SVPWM ") is supplied with three-phase symmetrical sine voltage
Three-phase symmetrical motor stator sub-ideal magnetic linkage circle is normative reference when electric, makees appropriate cut with three-phase inverter difference switching mode
Change, so as to form PWM ripples, justified with the actual flux linkage vector formed to follow the trail of its accurate magnetic linkage.SVPWM is a kind of existing skill
Art, it is also a kind of prior art to produce SVPWM waveform signals, and the application is not related to the improvement produced to SVPWM waveform signals, because
This is without repeating.
The motor is additionally provided with electrical parameter detection circuit, the output of the electrical parameter detection circuit and the input phase of protection circuit
Even, the output of the protection circuit is connected with central processing unit.The electrical parameter detection circuit includes DC voltage detection circuit, temperature
Detection circuit and output current detection circuit are spent, the DC voltage detection circuit is used for the input voltage for detecting motor；It is described
Temperature sensing circuit is used for the temperature for detecting motor；The output current detection circuit is used for the output current for detecting motor.Institute
It is comparison circuit to state protection circuit, and the input terminal of the comparison circuit is connected with the output terminal of parameters detection circuit, reference edge
It is connected respectively from different bleeder circuits, output terminal is connected with central processing unit, when the value of input terminal is more than the value of reference edge,
Output terminal output control signal so that central processing unit is stopped.
It is not difficult to find that the utility model is become larger by increasing the speed adjustable range of frequency converter motor, so as to meet to produce
Demand.
Claims (4)
1. a kind of drafting unit frequency converter, including motor, it is characterised in that the motor is connected by frequency conversion with frequency converter
Device controls the rotating speed of motor；The frequency converter includes central processing unit and drive circuit, the central processing unit and drive circuit
It is connected, for producing SVPWM waveform signals；The drive circuit drives the motor according to received SVPWM waveform signals, real
Now to the control of motor；The motor is additionally provided with electrical parameter detection circuit, output and the protection circuit of the electrical parameter detection circuit
Input be connected, it is described protection circuit output be connected with central processing unit.
2. drafting unit frequency converter according to claim 1, it is characterised in that the frequency converter further includes serially
Communication interface circuit, the serial communication interface circuit are connected with the central processing unit, are used for realization team control.
3. drafting unit frequency converter according to claim 1, it is characterised in that the electrical parameter detection circuit includes
DC voltage detection circuit, temperature sensing circuit and output current detection circuit, the DC voltage detection circuit are used to detect
The input voltage of motor；The temperature sensing circuit is used for the temperature for detecting motor；The output current detection circuit is used to examine
The output current of measured motor.
4. drafting unit frequency converter according to claim 1, it is characterised in that the protection circuit is more electric
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720963082.9U CN207283453U (en) | 2017-08-03 | 2017-08-03 | A kind of drafting unit frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720963082.9U CN207283453U (en) | 2017-08-03 | 2017-08-03 | A kind of drafting unit frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207283453U true CN207283453U (en) | 2018-04-27 |
Family
ID=61986844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720963082.9U Active CN207283453U (en) | 2017-08-03 | 2017-08-03 | A kind of drafting unit frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207283453U (en) |
-
2017
- 2017-08-03 CN CN201720963082.9U patent/CN207283453U/en active Active
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