CN219834003U - Variable frequency vector control circuit of cellulose material conveying pump - Google Patents
Variable frequency vector control circuit of cellulose material conveying pump Download PDFInfo
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- CN219834003U CN219834003U CN202321322039.6U CN202321322039U CN219834003U CN 219834003 U CN219834003 U CN 219834003U CN 202321322039 U CN202321322039 U CN 202321322039U CN 219834003 U CN219834003 U CN 219834003U
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- frequency converter
- relay
- switch
- alternating current
- power supply
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- 239000000463 material Substances 0.000 title claims abstract description 22
- 239000013598 vector Substances 0.000 title claims abstract description 19
- 229920002678 cellulose Polymers 0.000 title claims abstract description 12
- 239000001913 cellulose Substances 0.000 title claims abstract description 12
- 230000007935 neutral effect Effects 0.000 claims abstract description 10
- 230000001012 protector Effects 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001133 acceleration Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Abstract
The utility model discloses a variable frequency vector control circuit of a cellulose material conveying pump, which comprises a frequency converter, an overcurrent protector, a first relay and a second relay, wherein the input end of a power loop of the frequency converter is connected to an alternating current power supply, the output end of the power loop of the frequency converter is connected to a motor of the conveying pump, one end of the overcurrent protector is connected to a phase line of the alternating current power supply, the other end of the overcurrent protector is connected with a start switch, a stop switch and an emergency stop switch in series and then is connected to a fault signal input end of the frequency converter, the fault signal output end of the frequency converter is connected with a neutral line of the alternating current power supply after being connected with a coil winding of a first relay in series, a normally open switch of the first relay is connected with a control loop input end group of the frequency converter in series, the control loop output end group of the frequency converter is connected with a coil winding of the second relay, and the first normally open switch of the second relay is connected with the start switch in parallel. The remarkable effects are as follows: ensure that the screw conveying pump operates more stably, and effectively reduce material blockage.
Description
Technical Field
The utility model relates to the technical field of material conveying vector control, in particular to a variable frequency vector control circuit of a cellulose material conveying pump.
Background
At present, a variable-frequency speed-regulating screw conveying pump is mainly used for conveying cellulose pulpy materials, however, the running stability of the screw conveying pump is seriously influenced due to the high viscosity of the cellulose pulpy materials, more floccules and incomplete and uniform materials.
At present, for variable frequency speed regulation of screw conveying pumps, the control mode is mainly in a V/F mode, the voltage of a conveying pump motor can be reduced along with the reduction of the motor speed, the motor can not obtain enough torque (particularly when in low frequency) due to insufficient excitation, and the materials are often low in conveying frequency when the viscosity is high, and the corresponding torque requirement is also high. That is, the output of rated torque of the motor can not be satisfied when the frequency converter V/F is controlled at low frequency, and the output can not be changed along with the change of load, so that the defects of frequent blocking and tripping, unstable conveying flow and the like exist in the material conveying process.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a variable frequency vector control circuit of a cellulose material conveying pump, which adopts a frequency converter vector control mode to carry out speed regulation control on a screw conveying pump, so that the conveying pump runs stably and the blocking condition is obviously reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a variable frequency vector control circuit of a cellulose material conveying pump is characterized in that: the power circuit input end of the frequency converter is connected to an alternating current power supply, the power circuit output end of the frequency converter is connected to a motor of the conveying pump, one end of the overcurrent protector is connected to a phase line of the alternating current power supply, the other end of the overcurrent protector is connected with a starting switch, a stopping switch and a sudden stop switch in series and then connected to a fault signal input end of the frequency converter, the fault signal output end of the frequency converter is connected with a neutral line of the alternating current power supply after being connected with a coil winding of the first relay in series, a normally open switch of the first relay is connected with a control circuit input end group of the frequency converter in series, the control circuit output end group of the frequency converter is connected with the coil winding of the second relay, and a first normally open switch of the second relay is connected with the starting switch in parallel.
Further, the start switch, the stop switch and the emergency stop switch are integrally arranged on the field operation column beside the conveying pump.
Further, an operation indicator lamp is further arranged on the field operation column, one end of the operation indicator lamp is connected with the phase line of the alternating current power supply after being connected with the normally closed switch of the second relay in series, and the other end of the operation indicator lamp is connected to the neutral line of the alternating current power supply.
Further, a stop indicator lamp is further arranged on the field operation column, one end of the stop indicator lamp is connected with the phase line of the alternating current power supply after being connected with the second normally open switch of the second relay in series, and the other end of the stop indicator lamp is connected to the neutral line of the alternating current power supply.
The utility model has the remarkable effects that: the circuit structure is simple, easy to realize, the speed regulation control is carried out on the screw conveying pump of the cellulose materials by adopting the mode of vector control of the frequency converter, the control mode of the frequency converter is set to be vector control without a speed sensor, and the starting frequency is different according to different machine types, so that the screw conveying pump is ensured to run more stably, the material blockage is effectively reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic circuit configuration of the present utility model.
Detailed Description
The following describes the embodiments and working principles of the present utility model in further detail with reference to the drawings.
As shown in fig. 1, a variable frequency vector control circuit of a cellulose material conveying pump comprises a frequency converter, an overcurrent protector FU1, a first relay KM2, an operation indicator light HG and a stop indicator light HR, wherein the power loop input end of the frequency converter is connected to an alternating current power supply, the power loop output end of the frequency converter is connected to a motor M of the conveying pump, one end of the overcurrent protector FU1 is connected to a phase line L1 of the alternating current power supply, the other end of the overcurrent protector FU1 is connected in series with a start switch SB1, a stop switch SS1 and an emergency stop switch ST1 and then is connected to a fault signal input end of the frequency converter, the fault signal output end of the frequency converter is connected in series with a coil winding of the first relay KM1 and then is connected to a neutral line N of the alternating current power supply, a normally open switch of the first relay KM1 is connected in series with a control loop input end group of the frequency converter, a control loop output end group of the frequency converter is connected with a coil winding of the first relay KM2, and the first switch SB 2 is connected in parallel with the normally open switch SB 1;
one end of the running indicator lamp HG is connected with the normally closed switch of the first relay KM2 in series and then is connected with the phase line L1 of the alternating current power supply, and the other end of the running indicator lamp HG is connected with the neutral line N of the alternating current power supply;
one end of the stop indicator lamp HR is connected with the second normally open switch of the first relay KM2 in series and then is connected with the phase line L1 of the alternating current power supply, and the other end of the stop indicator lamp HR is connected to the neutral line N of the alternating current power supply.
In a specific implementation, the start switch SB1, the stop switch SS1 and the emergency stop switch ST1 are integrally disposed on a field operation column beside the transfer pump, and the running indicator light HG and the stop indicator light HR are disposed on the field operation column near the switch group.
The basic principle of vector control is to control exciting current and torque current of an asynchronous motor according to the magnetic field orientation principle by measuring and controlling stator current vectors of the asynchronous motor, so as to achieve the purpose of controlling the torque of the asynchronous motor. Therefore, in this embodiment, the speed regulation control is performed on the screw conveying pump of the cellulose materials by adopting the mode of vector control of the frequency converter, the control mode of the frequency converter is set to be vector control without a speed sensor, the starting frequency is different according to different machine types (the 5.5KW three-phase asynchronous motor is set at 5HZ, the acceleration time is set at 7-10 seconds, the time can be set from top to bottom to be proper, and is not too short, if the acceleration time is too short, the current during acceleration will increase rapidly, and the over-current protection of the frequency converter cannot start, the parameter measurement and assignment of the motor must be performed through the frequency converter before operation, and the other parameters are set by referring to the frequency converter, so that excellent control performance is achieved), thereby ensuring that the screw conveying pump operates more stably, effectively reducing the material blockage, and improving the production efficiency.
The technical scheme provided by the utility model is described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (4)
1. A frequency conversion vector control circuit of a cellulose material conveying pump is characterized in that: the power circuit input end of the frequency converter is connected to an alternating current power supply, the power circuit output end of the frequency converter is connected to a motor of the conveying pump, one end of the overcurrent protector is connected to a phase line of the alternating current power supply, the other end of the overcurrent protector is connected with a starting switch, a stopping switch and a sudden stop switch in series and then connected to a fault signal input end of the frequency converter, the fault signal output end of the frequency converter is connected with a neutral line of the alternating current power supply after being connected with a coil winding of the first relay in series, a normally open switch of the first relay is connected with a control circuit input end group of the frequency converter in series, the control circuit output end group of the frequency converter is connected with the coil winding of the second relay, and a first normally open switch of the second relay is connected with the starting switch in parallel.
2. The variable frequency vector control circuit of the cellulosic material transfer pump according to claim 1, wherein: the start switch, the stop switch and the emergency stop switch are integrally arranged on the field operation column beside the conveying pump.
3. The variable frequency vector control circuit of the cellulosic material transfer pump according to claim 2, wherein: and an operation indicator lamp is further arranged on the field operation column, one end of the operation indicator lamp is connected with the phase line of the alternating current power supply after being connected with the normally closed switch of the second relay in series, and the other end of the operation indicator lamp is connected to the neutral line of the alternating current power supply.
4. A variable frequency vector control circuit of a cellulosic material transfer pump according to claim 2 or 3, wherein: and a stop indicator lamp is further arranged on the field operation column, one end of the stop indicator lamp is connected with the phase line of the alternating current power supply after being connected with the second normally open switch of the second relay in series, and the other end of the stop indicator lamp is connected to the neutral line of the alternating current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321322039.6U CN219834003U (en) | 2023-05-29 | 2023-05-29 | Variable frequency vector control circuit of cellulose material conveying pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321322039.6U CN219834003U (en) | 2023-05-29 | 2023-05-29 | Variable frequency vector control circuit of cellulose material conveying pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219834003U true CN219834003U (en) | 2023-10-13 |
Family
ID=88281649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321322039.6U Active CN219834003U (en) | 2023-05-29 | 2023-05-29 | Variable frequency vector control circuit of cellulose material conveying pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219834003U (en) |
-
2023
- 2023-05-29 CN CN202321322039.6U patent/CN219834003U/en active Active
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