CN116846194A - Control center of frequency converter - Google Patents

Control center of frequency converter Download PDF

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Publication number
CN116846194A
CN116846194A CN202310947851.6A CN202310947851A CN116846194A CN 116846194 A CN116846194 A CN 116846194A CN 202310947851 A CN202310947851 A CN 202310947851A CN 116846194 A CN116846194 A CN 116846194A
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CN
China
Prior art keywords
interface
frequency
frequency converter
control system
node
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Pending
Application number
CN202310947851.6A
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Chinese (zh)
Inventor
徐云研
徐连鸣
阎競
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Tianjin Zhongdi Energy Conservation Technology Co ltd
Tianjin Jujing Automation New Technology Co ltd
Original Assignee
Tianjin Zhongdi Energy Conservation Technology Co ltd
Tianjin Jujing Automation New Technology Co ltd
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Application filed by Tianjin Zhongdi Energy Conservation Technology Co ltd, Tianjin Jujing Automation New Technology Co ltd filed Critical Tianjin Zhongdi Energy Conservation Technology Co ltd
Priority to CN202310947851.6A priority Critical patent/CN116846194A/en
Publication of CN116846194A publication Critical patent/CN116846194A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Feedback Control In General (AREA)

Abstract

The invention provides a control center of a frequency converter, which comprises a frequency converter connecting end, a control system connecting end, a frequency setting and feedback module connecting end, an operating state indicating module connecting end and a mode selection switch, wherein the control center is connected with the frequency converter, the control system, the frequency setting and feedback module and the operating state indicating module through the frequency converter connecting end, the control system connecting end, the frequency setting and feedback module connecting end and the operating state indicating module connecting end respectively. The control center of the frequency converter realizes one-key switching of manual and automatic modes of the frequency converter, provides related functions of manual control of the frequency converter, can transmit manual and automatic control signals and feedback signals of the frequency converter, and is used as a signal transmission bridge among other multiple modules, so that complex wiring among devices is avoided, wiring difficulty is greatly reduced, and construction and maintenance are more convenient.

Description

Control center of frequency converter
Technical Field
The invention belongs to the technical field of frequency converter control, and particularly relates to a frequency converter control center.
Background
Advanced inverter control systems typically include both manual and automatic modes. In general, the system operates in an automatic mode, and the automatic control system determines the start-stop and output frequency of the frequency converter. Under the special conditions of failure, test, overhaul and the like of an automatic control system, the frequency converter can continue to operate through manual control, and related equipment can work normally.
In order to realize the functions, the invention provides a control center of the frequency converter, which is used for realizing the switching of manual and automatic modes of the frequency converter, providing related functions of manual control of the frequency converter, and simultaneously transmitting manual and automatic control signals, feedback signals of the frequency converter and the like.
Disclosure of Invention
In view of the above, the present invention is directed to overcoming the shortcomings of the prior art, and providing a control hub of a frequency converter.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the control center is connected with the frequency converter, the control system, the frequency setting and feedback module and the running state indicating module through the frequency converter connecting end, the control system connecting end, the frequency setting and feedback module connecting end and the running state indicating module connecting end respectively;
the frequency converter connecting end comprises an interface C B1 、C B2 、C B3 、C B4 、C B5 、C B6 、C B7 、C B8 、C B9 、C B10 、C B11 、C B12 、C B13 、C B14 、C B15 、C B16 、C B17 The method comprises the steps of carrying out a first treatment on the surface of the The control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 、C K9 The method comprises the steps of carrying out a first treatment on the surface of the The connection end of the frequency setting and feedback module comprises an interface C P1 、C P2 、C P3 、C P4 、C P5 The method comprises the steps of carrying out a first treatment on the surface of the The running state indicating module connecting end comprises an interface C Y1 、C Y2 、C Y3 ；
The interface C B1 One side is connected with the positive pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K1 Through interface C K1 Connecting the automatic mode frequency output anode of the control system end;
the interface C B2 One side is connected with the negative pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K2 Through interface C K2 Connecting a control system end automatic mode frequency output cathode;
the interface C B3 One side is connected with the positive pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K3 Through interface C K3 The first frequency feedback input anode is connected with the control system end;
the interface C B4 One side is connected with the negative pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K4 Through interface C K4 The first frequency feedback input cathode of the control system end is connected;
the interface C B7 One side is connected with a DC 24V+ end of the frequency converter, and the other side passes through a node C Z3 The method is divided into 3 paths:
first pass through node C Z2 Connecting relay J 1 Coil side and diode VD 1 Negative electrode, J 1 Coil other side and VD 1 Positive electrode all connects node C Z1 ，C Z1 Series connection safety FU 1 Then pass through interface C B6 Connecting a frequency converter with DC 24V-from;
second-path series relay J 3 Normally open switch J of (2) 3-1 Then pass through interface C B5 The automatic mode starting signal input end of the frequency converter is connected;
third pass node C Z4 Dividing into two paths again, wherein one path is connected in series with a normally open switch K 1-1 Then pass through interface C B8 The manual starting signal input end of the frequency converter is connected; another way is connected in series with normally open switch K 2-1 Then pass through interface C B9 The automatic mode signal input end of the frequency converter is connected;
the interface C B10 One side is connected with the manual frequency input end of the frequency converter, and the other side is connected with a normally open switch K in series 1-2 Rear connection interface C P1 Through interface C P1 Connecting the frequency setting and feedback module frequency setting value output end;
the interface C B11 One side of the converter is connected with DC 10V-and the other side is connected with an interface C P2 Through interface C P2 Connecting a frequency setting signal source cathode with a frequency setting signal source cathode of a feedback module;
the interface C B12 One side of the converter is connected with DC 10V+ and the other side is connected with an interface C P3 Through interface C P3 Connecting the frequency setting signal source anode with the frequency setting signal source anode of the feedback module;
the interface C B13 One side is connected with the positive pole of the second frequency feedback output end of the frequency converter, and the other side is connected with the interface C P4 Through interface C P4 Connecting the positive electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B14 One side is connected with the negative pole of the second frequency feedback output end of the frequency converter, and the other side is connected with the interface C P5 Through interface C P5 Connecting the negative electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B15 One side is connected with the abnormal signal output end of the frequency converter, and the other side is connected with the interface C Y1 Through interface C Y1 The abnormal signal end of the frequency converter of the running state indicating module is connected;
the interface C B16 One side is connected with the normal signal output end of the frequency converter, and the other side passes through the node C Z5 The method is divided into two paths: first path connection interface C Y2 Through interface C Y2 The normal signal end of the frequency converter of the running state indicating module is connected; second path series connection safety FU 2 After that, at node C Z6 Respectively connected with relays J 2 Coil side and diode VD 2 Negative electrode, J 2 Connecting node C at the other side of the coil Z7 ，VD 2 Positive electrode connecting jointPoint C Z8 Node C Z7 And C Z8 Node C is shorted by shorting the wire Z8 Connection interface C K7 Through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C Y3 One side is connected with the COM end of the running state indicating module, and the other side is connected with the node C Z7 And then through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C B17 One side is connected with the positive/abnormal indication COM end of the frequency converter, and the other side is connected with a relay J in series 1 Normally open switch J 1-1 After that, at node C Z9 The method is divided into two paths: first path through interface C K8 The DC 24V+ power supply is connected with the control system end; second pass through node C Z10 Respectively connected with relays J 3 Coil side and diode VD 3 Negative electrode, J 3 Coil other side and VD 3 Positive electrode all connects node C Z11 Then pass through node C Z11 Connecting Darlington tubes DT 1 Is (DT) 1 Emitter pass node C of (C) Z12 Connection interface C K7 Further connected with a DC 24V-power supply at the control system end, DT 1 Is connected with the potentiometer RP in series with the base electrode 1 Fixed resistor R 1 Then through interface C K9 Connecting the control system with an automatic starting signal output end;
the interface C K5 One end of the normally open switch is connected with the control system frequency converter at the value signal end, and the other end of the normally open switch is connected with the normally open switch in series 2-2 Relay J 2 Normally open switch J 2-1 Rear connection interface C K6 Through interface C K6 The control system end frequency converter is connected with a value signal source;
the mode selection switch is a knob switch and a control switch K 1-1 、K 1-2 、K 2-1 、K 2-2 Wherein the switch K 1-1 、K 1-2 The two are linked switches which are synchronously opened or closed; switch K 2-1 、K 2-2 The two are synchronously opened or closed for the linkage switch.
Further, the mode selection switch has three gear positions in total:
intermediate position: stop mode, K 1-1 、K 1-2 、K 2-1 、K 2-2 All are disconnected;
counterclockwise rotational position: manually start, K 1-1 、K 1-2 Closing, K 2-1 、K 2-2 Disconnecting;
clockwise rotational position: automatic mode, K 1-1 、K 1-2 Disconnection, K 2-1 、K 2-2 Closing.
Further, the control system includes a DDC controller.
Furthermore, the frequency setting and feedback module comprises a potentiometer and a frequency table, and is used for inputting the frequency requirement of the frequency converter through the potentiometer in a manual mode, and displaying the actual output frequency of the frequency converter in the manual and automatic operation modes through the frequency table.
Further, the running state indicating module comprises an alarm sound and an indicating lamp and is used for displaying the state of the frequency converter.
Compared with the prior art, the control center of the frequency converter has the following advantages:
(1) The control center of the frequency converter provided by the invention has two control modes of manual operation and automatic operation, and the two modes can be switched by one key.
(2) The invention creates the frequency converter control center, manual and automatic mode interlocking, namely under the automatic control mode, the manual control circuit is cut off; in the manual control mode, the automatic control circuit is cut off.
(3) The invention provides a control center of a frequency converter, and an automatic mode and a manual mode respectively provide special signal interfaces, namely, an automatic starting signal, a manual starting signal, automatic frequency input, manual frequency input and the like of the control center are respectively provided with independent interfaces. The control requirements of various frequency converters can be met by adjusting the wiring mode.
(4) The control center of the frequency converter, which is provided by the invention, is used as a signal transmission bridge among a plurality of modules such as the frequency converter, an automatic control system, a frequency setting and feedback module, an operation state indicating module and the like, and all signals are transmitted through the center, so that complex wiring among equipment is avoided, wiring difficulty is greatly reduced, and construction and maintenance are more convenient.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute an undue limitation on the invention. In the drawings:
FIG. 1 is a circuit diagram of a control hub of a frequency converter of the present invention;
fig. 2 is a schematic diagram illustrating connection between a control hub of a frequency converter and an external device.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1-2, the present invention provides a control hub of a frequency converter, which includes a circuit board, and a frequency converter connection end, a control system connection end, a frequency setting and feedback module connection end, an operating state indicating module connection end, and a mode selection switch which are disposed on the circuit board, wherein the control hub is connected with the frequency converter, the control system, the frequency setting and feedback module, and the operating state indicating module through the frequency converter connection end, the control system connection end, the frequency setting and feedback module connection end, and the operating state indicating module connection end, respectively; it should be noted that the frequency converter, the control system, the frequency setting and feedback module, the running state indicating module and the mode selection switch used in the invention are all common products in the field.
Specifically, the converter connection end includes an interface C B1 、C B2 、C B3 、C B4 、C B5 、C B6 、C B7 、C B8 、C B9 、C B10 、C B11 、C B12 、C B13 、C B14 、C B15 、C B16 、C B17 The method comprises the steps of carrying out a first treatment on the surface of the The control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 、C K9 The method comprises the steps of carrying out a first treatment on the surface of the The connection end of the frequency setting and feedback module comprises an interface C P1 、C P2 、C P3 、C P4 、C P5 The method comprises the steps of carrying out a first treatment on the surface of the The running state indicating module connecting end comprises an interface C Y1 、C Y2 、C Y3 ；
The saidInterface C B1 One side is connected with the positive pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K1 Through interface C K1 Connecting the automatic mode frequency output anode of the control system end;
the interface C B2 One side is connected with the negative pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K2 Through interface C K2 Connecting a control system end automatic mode frequency output cathode;
the interface C B3 One side is connected with the positive pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K3 Through interface C K3 The first frequency feedback input anode is connected with the control system end;
the interface C B4 One side is connected with the negative pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K4 Through interface C K4 The first frequency feedback input cathode of the control system end is connected;
the interface C B7 One side is connected with a DC 24V+ end of the frequency converter, and the other side passes through a node C Z3 The method is divided into 3 paths:
first pass through node C Z2 Connecting relay J 1 Coil side and diode VD 1 Negative electrode, J 1 Coil other side and VD 1 Positive electrode all connects node C Z1 ，C Z1 Series connection safety FU 1 Then pass through interface C B6 Connecting a frequency converter with DC 24V-from;
second-path series relay J 3 Normally open switch J of (2) 3-1 Then pass through interface C B5 The automatic mode starting signal input end of the frequency converter is connected;
third pass node C Z4 Dividing into two paths again, wherein one path is connected in series with a normally open switch K 1-1 Then pass through interface C B8 The manual starting signal input end of the frequency converter is connected; another way is connected in series with normally open switch K 2-1 Then pass through interface C B9 The automatic mode signal input end of the frequency converter is connected;
the interface C B10 One side is connected with the manual frequency input end of the frequency converter, and the other side is connected with a normally open switch K in series 1-2 Rear connection interface C P1 Through interface C P1 Connecting the frequency setting and feedback module frequency setting value output end;
the interface C B11 One side of the converter is connected with DC 10V-and the other side is connected with an interface C P2 Through interface C P2 Connecting a frequency setting signal source cathode with a frequency setting signal source cathode of a feedback module;
the interface C B12 One side of the converter is connected with DC 10V+ and the other side is connected with an interface C P3 Through interface C P3 Connecting the frequency setting signal source anode with the frequency setting signal source anode of the feedback module;
the interface C B13 One side is connected with the positive pole of the second frequency feedback output end of the frequency converter, and the other side is connected with the interface C P4 Through interface C P4 Connecting the positive electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B14 One side is connected with the negative pole of the second frequency feedback output end of the frequency converter, and the other side is connected with the interface C P5 Through interface C P5 Connecting the negative electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B15 One side is connected with the abnormal signal output end of the frequency converter, and the other side is connected with the interface C Y1 Through interface C Y1 The abnormal signal end of the frequency converter of the running state indicating module is connected;
the interface C B16 One side is connected with the normal signal output end of the frequency converter, and the other side passes through the node C Z5 The method is divided into two paths: first path connection interface C Y2 Through interface C Y2 The normal signal end of the frequency converter of the running state indicating module is connected; second path series connection safety FU 2 After that, at node C Z6 Respectively connected with relays J 2 Coil side and diode VD 2 Negative electrode, J 2 Connecting node C at the other side of the coil Z7 ，VD 2 Positive electrode connection node C Z8 Node C Z7 And C Z8 Node C is shorted by shorting the wire Z8 Connection interface C K7 Through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C Y3 One side is connected with the COM end of the running state indicating module, and the other side is connected with the node C Z7 And then through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C B17 One side is connected with the positive/abnormal indication COM end of the frequency converter, and the other side is connected with a relay J in series 1 Normally open switch J 1-1 After that, at node C Z9 The method is divided into two paths: first path through interface C K8 The DC 24V+ power supply is connected with the control system end; second pass through node C Z10 Respectively connected with relays J 3 Coil side and diode VD 3 Negative electrode, J 3 Coil other side and VD 3 Positive electrode all connects node C Z11 Then pass through node C Z11 Connecting Darlington tubes DT 1 Collector (C pole), DT 1 Emitter (E pole) of (B) passing through node C Z12 Connection interface C K7 Further connected with a DC 24V-power supply at the control system end, DT 1 Base (B pole) series potentiometer RP 1 Fixed resistor R 1 Then through interface C K9 Connecting the control system with an automatic starting signal output end;
the interface C K5 One end of the normally open switch is connected with the control system frequency converter at the value signal end, and the other end of the normally open switch is connected with the normally open switch in series 2-2 Relay J 2 Normally open switch J 2-1 Rear connection interface C K6 Through interface C K6 The control system end frequency converter is connected with a value signal source;
the mode selection switch is a knob switch and a control switch K 1-1 、K 1-2 、K 2-1 、K 2-2 Wherein the switch K 1-1 、K 1-2 The two are linked switches which are synchronously opened or closed; switch K 2-1 、K 2-2 The two are synchronously opened or closed for the linkage switch.
Specifically, the mode selection switch has three gear positions in total:
intermediate position: stop mode, K 1-1 、K 1-2 、K 2-1 、K 2-2 All are disconnected;
counterclockwise rotational position: manually start, K 1-1 、K 1-2 Closing, K 2-1 、K 2-2 Disconnecting;
clockwise rotational position: automatic mode, K 1-1 、K 1-2 Disconnection, K 2-1 、K 2-2 Closing.
Specifically, the control system comprises a DDC controller, and when a user selects an automatic mode, parameters such as start and stop, frequency requirement and the like are sent to the frequency converter according to program setting, and a DC 24V power supply is provided.
Specifically, the frequency setting and feedback module comprises a potentiometer and a frequency table, and is used for inputting the frequency requirement of the frequency converter through the potentiometer in a manual mode, and displaying the actual output frequency of the frequency converter in the manual and automatic operation modes through the frequency table.
Specifically, the running state indicating module comprises an alarm sound and an indicating lamp, and the states of normal, abnormal and the like of the frequency converter are displayed through the alarm sound, the indicating lamp and the like.
In the invention, a switch K is arranged between a COM end of the frequency converter and a normal signal output end of the frequency converter and an abnormal signal output end of the frequency converter 3 。
The working process of the invention is as follows:
after the frequency converter is electrified, the DC 10V, DC V power supply is externally output. After the control system is started, a DC 24V power supply is externally output.
After the frequency converter is supplied with DC 24V power, a relay J 1 Powering up, normally open switch J 1-1 And (3) sucking, namely connecting the DC 24V+ of the control system end to the positive/abnormal indication COM end of the frequency converter. The frequency converter passes the COM end through the switch K in the frequency converter according to the running state 3 Communication abnormal state output interface (interface C) B15 ) Or a normal state output interface (interface C) B16 )。
When the self-checking of the frequency converter is abnormal, the switch K 3 Switch-on interface C B15 Relay J 2 Power-off and normally open switch J 2-1 And (5) disconnecting. At the same time, the frequency converter abnormality signal terminal of the operation state indicating module (interface C Y1 ) DC 24V+ on, abnormal indicator light LED 1 And (5) lighting. Wherein, abnormal indicator light LED 1 The cathode is connected with the COM end inside the module and passes through the interface C Y3 DC 24V-was turned on.
When the self-checking of the frequency converter is normal, the switch K 3 Switch-on interface C B16 Relay J 2 Powering up, normally open switch J 2-1 And (5) sucking. At the same time, the normal signal end of the frequency converter of the running state indicating module (interface C Y2 ) DC 24V+ on and normal indicator light LED 2 And (5) lighting. Wherein, normal indicator light LED 2 The cathode is connected with the COM end inside the module and passes through the interface C Y3 DC 24V-was turned on.
Mode selection switch X 1 There are three gears corresponding to stop mode, manual start, automatic mode, respectively. The specific using method is as follows:
(1) Stop mode:
X 1 is positioned at the middle position, K 1-1 、K 1-2 、K 2-1 、K 2-2 All open. At this time, due to the switch K 1-1 Disconnection, manual start signal input of frequency converter (interface C B8 ) No DC 24V+ starting signal is generated, and manual operation is not performed; due to the switch K 2-1 Disconnection, automatic mode signal input (interface C B9 ) The DC 24V+ starting signal is not generated, and the frequency converter does not enter the automatic control mode. Therefore, the frequency converter does not have a start signal and does not work in the stop mode. In addition, due to the switch K 2-2 The control system frequency converter is disconnected at the value signal end (interface C K5 ) The frequency converter on-value signal cannot be received. The control system can only send the start signal to the value converter according to the internal program setting (interface C K9 ) Therefore, when the frequency converter is not at value, C K9 There is no start-up current signal, i.e. the darlington tube B is very currentless. At this time, the C pole and E pole of the Darlington tube are not conducted, and the relay J 3 Power-off and normally open switch J 3-1 Disconnection, automatic mode start signal terminal of frequency converter (interface C B5 ) The DC 24V+ start signal cannot be received, and further, the frequency converter cannot work in the stop mode.
(2) And (3) manual starting:
X 1 in the left-hand (counter-clockwise) position, K 1-1 、K 1-2 Closing, K 2-1 、K 2-2 And (5) disconnecting. At this time, the frequency converter receives a DC 24V+ manual start signal (interface C B8 ) And the manual frequency input end of the frequency converter (interface C B10 ) Output end (interface C) capable of receiving frequency setting and feedback module frequency setting P1 ) A signal. The frequency setting source is the frequency converter with DC 10V voltage and passes through the potentiometer RP 2 Equal adjustment frequency set point output (interface C) P1 ) Analog output can realize the frequency adjustment of the frequency converter. A second frequency feedback output (C B13 、C B14 ) The actual frequency is fed back to the frequency setting and feedback module and displayed by a frequency table in the module, etc. Meanwhile, all signals of the automatic mode are disconnected, and the signals are the same as those of the stop mode, and are not described in detail.
(3) Automatic mode:
X 1 in the right-hand (counter-clockwise) position, K 1-1 、K 1-2 Disconnection, K 2-1 、K 2-2 Closing. Due to switch K 2-1 Closed, automatic mode signal input of frequency converter (interface C B9 ) And receiving a DC 24V+ starting signal and entering an automatic control mode. When the frequency converter is self-checked to be normal, the relay J 2 When power is on, switch K 2-2 And J 2-1 All are closed, the control system receives the frequency converter in-value signal (interface C K5 ) The automatic control of the frequency converter is started according to program setting: when the frequency converter is required to be started, the control system passes through the interface C K9 An automatic mode starting current signal is sent out, for example, a 4-20 mA standard control current signal, and specific numerical values are not limited. Constant resistor R 1 And potentiometer RP 1 And a combination for controlling and adjusting the magnitude of the control current. Darlington tube DT 1 After the current is amplified according to a certain multiplying power, enough current is formed between the C pole and the E pole to drive the relay J 3 Electrifying and making it normally open to switch J 3-1 Closing, thereby inputting the self-contained DC 24V+ voltage of the frequency converter into the automatic mode starting signal end (interface C) B5 ). The control system also sends out an automatic mode frequency signal (interface C K1 、C K2 ) The frequency converter receives the automatic control signal and operates according to the instruction.The frequency converter is also fed back by a first frequency (interface C B3 、C B4 ) The actual frequency is fed back to the control system for closed loop control of the system. Of course, the second frequency feedback also synchronously outputs the actual frequency, which is the same as the manual mode, and will not be described in detail. Meanwhile, all signals in the manual mode are disconnected and the same as those in the stop mode, and detailed description is omitted.
Diode VD 1 、VD 2 、VD 3 The control center is prevented from being damaged by the induced electromotive force on the coil after the relay is powered off; safety FU 1 、FU 2 Is used for preventing the damage to the center caused by the overlarge control current.
In summary, the control center of the frequency converter provided by the invention has two control modes, namely manual control mode and automatic control mode, and the two modes can be switched by one key. The manual mode and the automatic mode are interlocked, namely, the manual control circuit is cut off in the automatic control mode; in the manual control mode, the automatic control circuit is cut off. The automatic and manual modes respectively provide special signal interfaces, namely, an automatic starting signal, a manual starting signal, an automatic frequency input, a manual frequency input and the like of the automatic and manual modes respectively have independent interfaces. The control requirements of various frequency converters can be met by adjusting the wiring mode.
In addition, the control center of the frequency converter provided by the invention is used as a signal transmission bridge among a plurality of devices and modules such as the frequency converter, a control system, a frequency setting and feedback module, an operation state indicating module and the like, and all signals are transmitted through the center, so that complex wiring among the devices is avoided, wiring difficulty is greatly reduced, and construction and maintenance are more convenient.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A control hub for a frequency converter, comprising: the control center is connected with the frequency converter, the control system, the frequency setting and feedback module and the running state indication module through the frequency converter connecting end, the control system connecting end, the frequency setting and feedback module connecting end and the running state indication module connecting end respectively;
the frequency converter connecting end comprises an interface C B1 、C B2 、C B3 、C B4 、C B5 、C B6 、C B7 、C B8 、C B9 、C B10 、C B11 、C B12 、C B13 、C B14 、C B15 、C B16 、C B17 The method comprises the steps of carrying out a first treatment on the surface of the The control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 、C K9 The method comprises the steps of carrying out a first treatment on the surface of the The connection end of the frequency setting and feedback module comprises an interface C P1 、C P2 、C P3 、C P4 、C P5 The method comprises the steps of carrying out a first treatment on the surface of the The running state indicating module connecting end comprises an interface C Y1 、C Y2 、C Y3 ；
The interface C B1 One side is connected with the positive pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K1 Through interface C K1 Connecting the automatic mode frequency output anode of the control system end;
the interface C B2 One side is connected with the negative pole of the automatic mode frequency input end of the frequency converter, and the other side is connected with the interface C K2 Through interface C K2 Connecting a control system end automatic mode frequency output cathode;
the interface C B3 One side is connected with the positive pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K3 Through interface C K3 The first frequency feedback input anode is connected with the control system end;
the interface C B4 One side is connected with the negative pole of the first frequency feedback output end of the frequency converter, and the other side is connected with the interface C K4 Through interface C K4 The first frequency feedback input cathode of the control system end is connected；
The interface C B7 One side is connected with a DC 24V+ end of the frequency converter, and the other side passes through a node C Z3 The method is divided into 3 paths:
first pass through node C Z2 Connecting relay J 1 Coil side and diode VD 1 Negative electrode, J 1 Coil other side and VD 1 Positive electrode all connects node C Z1 ，C Z1 Series connection safety FU 1 Then pass through interface C B6 Connecting a frequency converter with DC 24V-from;
second-path series relay J 3 Normally open switch J of (2) 3-1 Then pass through interface C B5 The automatic mode starting signal input end of the frequency converter is connected;
third pass node C Z4 Dividing into two paths again, wherein one path is connected in series with a normally open switch K 1-1 Then pass through interface C B8 The manual starting signal input end of the frequency converter is connected; another way is connected in series with normally open switch K 2-1 Then pass through interface C B9 The automatic mode signal input end of the frequency converter is connected;
the interface C B10 One side is connected with the manual frequency input end of the frequency converter, and the other side is connected with a normally open switch K in series 1-2 Rear connection interface C P1 Through interface C P1 Connecting the frequency setting and feedback module frequency setting value output end;
the interface C B11 One side of the converter is connected with DC 10V-and the other side is connected with an interface C P2 Through interface C P2 Connecting a frequency setting signal source cathode with a frequency setting signal source cathode of a feedback module;
the interface C B12 One side of the converter is connected with DC 10V+ and the other side is connected with an interface C P3 Through interface C P3 Connecting the frequency setting signal source anode with the frequency setting signal source anode of the feedback module;
the interface C B13 One side is connected with the positive pole of the second frequency feedback output end of the frequency converter, and the other side is connected with the interface C P4 Through interface C P4 Connecting the positive electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B14 One side is connected with a frequency converterThe negative electrode of the second frequency feedback output end and the other side of the second frequency feedback output end are connected with an interface C P5 Through interface C P5 Connecting the negative electrode of the second frequency feedback input end of the frequency setting and feedback module;
the interface C B15 One side is connected with the abnormal signal output end of the frequency converter, and the other side is connected with the interface C Y1 Through interface C Y1 The abnormal signal end of the frequency converter of the running state indicating module is connected;
the interface C B16 One side is connected with the normal signal output end of the frequency converter, and the other side passes through the node C Z5 The method is divided into two paths: first path connection interface C Y2 Through interface C Y2 The normal signal end of the frequency converter of the running state indicating module is connected; second path series connection safety FU 2 After that, at node C Z6 Respectively connected with relays J 2 Coil side and diode VD 2 Negative electrode, J 2 Connecting node C at the other side of the coil Z7 ，VD 2 Positive electrode connection node C Z8 Node C Z7 And C Z8 Node C is shorted by shorting the wire Z8 Connection interface C K7 Through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C Y3 One side is connected with the COM end of the running state indicating module, and the other side is connected with the node C Z7 And then through interface C K7 Connecting a control system end DC 24V-power supply;
the interface C B17 One side is connected with the positive/abnormal indication COM end of the frequency converter, and the other side is connected with a relay J in series 1 Normally open switch J 1-1 After that, at node C Z9 The method is divided into two paths: first path through interface C K8 The DC 24V+ power supply is connected with the control system end; second pass through node C Z10 Respectively connected with relays J 3 Coil side and diode VD 3 Negative electrode, J 3 Coil other side and VD 3 Positive electrode all connects node C Z11 Then pass through node C Z11 Connecting Darlington tubes DT 1 Is (DT) 1 Emitter pass node C of (C) Z12 Connection interface C K7 Further connected with a DC 24V-power supply at the control system end, DT 1 Is connected with the potentiometer RP in series with the base electrode 1 Fixed resistor R 1 Then through interface C K9 Connecting the control system with an automatic starting signal output end;
the interface C K5 One end of the normally open switch is connected with the control system frequency converter at the value signal end, and the other end of the normally open switch is connected with the normally open switch in series 2-2 Relay J 2 Normally open switch J 2-1 Rear connection interface C K6 Through interface C K6 The control system end frequency converter is connected with a value signal source;
the mode selection switch is a knob switch and a control switch K 1-1 、K 1-2 、K 2-1 、K 2-2 Wherein the switch K 1-1 、K 1-2 The two are linked switches which are synchronously opened or closed; switch K 2-1 、K 2-2 The two are synchronously opened or closed for the linkage switch.
2. A control hub for a frequency converter according to claim 1, wherein: the mode selection switch has three gear positions in total:
intermediate position: stop mode, K 1-1 、K 1-2 、K 2-1 、K 2-2 All are disconnected;
counterclockwise rotational position: manually start, K 1-1 、K 1-2 Closing, K 2-1 、K 2-2 Disconnecting;
clockwise rotational position: automatic mode, K 1-1 、K 1-2 Disconnection, K 2-1 、K 2-2 Closing.
3. A control hub for a frequency converter according to claim 1, wherein: the control system includes a DDC controller.
4. A control hub for a frequency converter according to claim 1, wherein: the frequency setting and feedback module comprises a potentiometer and a frequency table, and is used for inputting the frequency requirement of the frequency converter through the potentiometer in a manual mode, and displaying the actual output frequency of the frequency converter in the manual and automatic operation modes through the frequency table.
5. A control hub for a frequency converter according to claim 1, wherein: the running state indicating module comprises an alarm sound and an indicating lamp and is used for displaying the state of the frequency converter.
CN202310947851.6A 2023-07-31 2023-07-31 Control center of frequency converter Pending CN116846194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310947851.6A CN116846194A (en) 2023-07-31 2023-07-31 Control center of frequency converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310947851.6A CN116846194A (en) 2023-07-31 2023-07-31 Control center of frequency converter

Publications (1)

Publication Number Publication Date
CN116846194A true CN116846194A (en) 2023-10-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310947851.6A Pending CN116846194A (en) 2023-07-31 2023-07-31 Control center of frequency converter

Country Status (1)

Country Link
CN (1) CN116846194A (en)

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