CN211209617U - Frequency conversion control system - Google Patents
Frequency conversion control system Download PDFInfo
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- CN211209617U CN211209617U CN201922004801.6U CN201922004801U CN211209617U CN 211209617 U CN211209617 U CN 211209617U CN 201922004801 U CN201922004801 U CN 201922004801U CN 211209617 U CN211209617 U CN 211209617U
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Abstract
The utility model discloses a frequency conversion control system relates to automatic control's technical field, has solved the inaccurate and weak technical problem of interference killing feature of current system control. The full-frequency-conversion closed-loop control system comprises an input power supply, a first filter connected with the input power supply, a reactor connected with the first filter, at least two motors, frequency converters and control modules, wherein the frequency converters and the control modules are consistent in number with the motors, the frequency converters are connected with the motors in a one-to-one correspondence mode, real-time working condition signals of the motors are transmitted to the corresponding frequency converters through a signal detection module to form full-frequency-conversion closed-loop control, the first filter is connected with the control module through a filtering device, and the control module is further connected with the frequency converters. The utility model effectively improves the rapidity, accuracy and stability of control in the frequency conversion control system, has more obvious energy-saving effect and greatly improves the user experience; meanwhile, the anti-interference capability is strong, and the work is stable and reliable.
Description
Technical Field
The utility model relates to an automatic control's technical field, more specifically say, it relates to a frequency conversion control system.
Background
The motor has been widely used in people's production and life, and along with the rapid development of the motor, the application of ordinary constant-speed motor has been gradually reduced, and the motor is replaced by a variable-frequency speed-regulating motor. The variable frequency speed regulating motor is a variable speed motor which realizes speed regulation by changing the power supply frequency of the motor, and a variable frequency control system for regulating the speed of the motor is an ideal high-efficiency and high-performance speed regulating means. Most of traditional frequency conversion control systems adopt one frequency converter to control the load of a plurality of motors, and the control method has the advantages of low cost and simple control system composition. But the problems of low control accuracy of the load, unobvious energy-saving effect, poor user experience and the like exist. In addition, the traditional frequency conversion control system has poor anti-interference capability, so that the work is unstable.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to prior art, provides a frequency conversion control system, the effectual accuracy that improves system control, and can effectual interference killing feature who improves the system.
The technical scheme of the utility model lies in: the utility model provides a frequency conversion control system, including input power, with the first wave filter that input power connects, with reactor and two at least motors that first wave filter is connected, still include the converter and the control module unanimous with motor quantity, the converter is connected with the motor one-to-one, the real-time operating mode signal of motor passes through signal detection module and transmits corresponding converter and form full frequency conversion closed loop control, first wave filter passes through filter equipment and is connected with control module, control module still is connected with the converter.
In a further improvement, the reactor is connected with the frequency converter through a relay, and the relay is in signal connection with the control module.
Furthermore, the filtering device comprises a second filter, the first filter is connected with the second filter through a transformer, and the second filter is connected with the control module.
Furthermore, a first protection device is arranged between the first filter and the transformer.
Further, the first filter is connected with the reactor and the first protection device through a control switch respectively.
Advantageous effects
The utility model has the advantages that: the frequency converters are connected with the motors in a one-to-one correspondence mode, and full frequency conversion control over the motors is achieved. Meanwhile, real-time working condition signals of the motor are transmitted to the corresponding frequency converter through the signal detection module to form a full-frequency conversion closed-loop control system, so that the control rapidity, accuracy and stability of the frequency conversion control system are effectively improved, the energy-saving effect is more obvious, and the user experience is greatly improved. In addition, the electric signal for providing working power for the control module is filtered through the filtering device, so that the electric signal input to the control module is more stable, the control module works more stably and reliably, and the anti-interference capability of the frequency conversion control system is effectively improved.
Drawings
Fig. 1 is a schematic view of the structural framework of the present invention;
fig. 2 is a schematic diagram of the structure frame of the present invention after being optimized;
fig. 3 is a schematic view of the electrical connection structure of the present invention.
Wherein: 1-input power supply, 2-first filter, 3-reactor, 4-frequency converter, 5-motor, 6-control module, 7-signal detection module, 8-filter device, 9-control switch, 10-relay, 11-first protection device, 81-transformer and 82-second filter.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.
Referring to fig. 1, the present invention relates to a frequency conversion control system, which comprises an input power source 1, a first filter 2 connected to the input power source 1, a reactor 3 connected to the first filter 2, and at least two motors 5. In the present embodiment, the number of the motors 5 is two. The frequency conversion control system also comprises frequency converters 4 and control modules 6, the number of which is consistent with that of the motors 5. The frequency converters 4 are connected with the motors 5 in a one-to-one correspondence mode, and real-time working condition signals of the motors 5 are transmitted to the corresponding frequency converters 4 through the signal detection module 7 to form full frequency conversion closed-loop control. In the embodiment, the two frequency converters 4 are connected with the two motors 5 in a one-to-one correspondence manner, so that full frequency conversion control of the motors 5 is realized; and the signal detection module 7 is respectively connected with the frequency converter 4 and the motor 5 to form a full frequency conversion closed-loop control system. By adopting the full frequency conversion closed-loop control system, the rapidity, the accuracy and the stability of control in the frequency conversion control system are effectively improved, the energy-saving effect is more obvious, and the user experience is greatly improved. The first filter 2 is connected with a control module 6 through a filter device 8, and the control module 6 is further connected with a frequency converter 4. The electric signal for providing working electricity for the control module 6 has the filtering effect of the filtering device 8, so that the anti-interference capability of the variable frequency control system is effectively improved.
Referring to fig. 2 to 3, the reactor 3 is connected to the frequency converter 4 through the relay 10, and the relay 10 is in signal connection with the control module 6. Specifically, the number of the relays 10 is the same as the number of the frequency converters 4, and the relays 10 are connected to the frequency converters 4 in a one-to-one correspondence. The frequency converter 4 and the motor 5 are controlled by a relay 10. In this embodiment, the filter device 8 includes a second filter 82, the first filter 2 is connected to the second filter 82 through a transformer 81, and the second filter 82 is connected to the control module 6. The voltage stabilization of the transformer 81 and the filtering action of the second filter 82 stabilize the electric signal input to the control module 6, and thus the operation of the control module 6 is more stable. Preferably, a first protection device 11 is provided between the first filter 2 and the transformer 81. Wherein the first protection device 11 is a fuse tube. Through the protection of the first protection device 11 to the control module 6, the damage to the control module 6 caused by faults such as short circuit, overload and the like of a power supply circuit or system components is avoided, and the control module 6 is effectively protected. The first filter 2 is connected to the reactor 3 and the first protection device 11 through the control switch 9, respectively. The on-off control of the frequency conversion control system is realized through the control switch 9.
The input power supply 1 of the embodiment is a three-phase power supply, the first filter 2 and the reactor 3 filter the input power supply 1 and provide stable power supply for the frequency converter 4, so that the harmonic interference resistance of the frequency conversion control system is improved, the control module 6 is a P L C controller, and the power supply input end of the control module 6 is connected with any two three-phase lines between the control switch 9 and the reactor 3 through the second filter 82 and the transformer 81.
In order to better understand the working process of the variable frequency control system, the motor 5 of the embodiment is a water pump, the carrier driven by the motor 5 is water, and the signal detection module 7 is a pressure sensor. However, the motor 5 is not limited to a water pump, the carrier is not limited to water, and the signal detection module 7 is not limited to a pressure sensor.
The utility model discloses a theory of operation is: when the input power 1 is turned on and the control switch 9 is turned on, the electric signal of the input power 1 passes through the transformer 81 and the second filter 82, so that the control module 6 obtains a stable electric signal, and the control module 6 starts to operate. The control module 6 turns on the relay 10, and the electric signal input to the power supply 1 passes through the first filter 2 and the reactor 3 to provide stable electric signals for the two frequency converters 4, so that the frequency converters 4 are in a working state. The control module 6 sends a control signal to the frequency converter 4, so that the frequency converter 4 outputs a set power signal to the motor 5, namely the water pump, and the motor 5 runs at the set power. Meanwhile, the signal detection module 7, namely the pressure sensor, sends the carrier, namely the real-time conveying pressure of the water, to the frequency converter 4, so that the frequency converter 4 outputs a power signal according to the real-time change of the real-time working condition of the carrier, and the motor 5 drives the carrier stably.
The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.
Claims (5)
1. The utility model provides a frequency conversion control system, including input power supply (1), with first wave filter (2) that input power supply (1) is connected, with reactor (3) and two at least motors (5) that first wave filter (2) are connected, characterized in that, still include with frequency converter (4) and control module (6) that motor (5) quantity is unanimous, frequency converter (4) are connected with motor (5) one-to-one, the real-time operating mode signal of motor (5) passes through signal detection module (7) and transmits corresponding frequency converter (4) and form full variable frequency closed loop control, first wave filter (2) are connected with control module (6) through filter equipment (8), control module (6) still are connected with frequency converter (4).
2. A variable frequency control system according to claim 1, characterized in that the reactor (3) is connected to the frequency converter (4) via a relay (10), and that the relay (10) is in signal connection with the control module (6).
3. A variable frequency control system according to claim 1, characterized in that the filter means (8) comprises a second filter (82), the first filter (2) being connected to the second filter (82) via a transformer (81), the second filter (82) being connected to the control module (6).
4. A variable frequency control system according to claim 3, characterized in that a first protection means (11) is arranged between the first filter (2) and the transformer (81).
5. A variable frequency control system according to claim 4, characterized in that the first filter (2) is connected to the reactor (3) and the first protection device (11) respectively via a control switch (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922004801.6U CN211209617U (en) | 2019-11-20 | 2019-11-20 | Frequency conversion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922004801.6U CN211209617U (en) | 2019-11-20 | 2019-11-20 | Frequency conversion control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211209617U true CN211209617U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922004801.6U Expired - Fee Related CN211209617U (en) | 2019-11-20 | 2019-11-20 | Frequency conversion control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211209617U (en) |
-
2019
- 2019-11-20 CN CN201922004801.6U patent/CN211209617U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |