CN116800071A - Power supply center of frequency converter control system - Google Patents

Power supply center of frequency converter control system Download PDF

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Publication number
CN116800071A
CN116800071A CN202310723486.0A CN202310723486A CN116800071A CN 116800071 A CN116800071 A CN 116800071A CN 202310723486 A CN202310723486 A CN 202310723486A CN 116800071 A CN116800071 A CN 116800071A
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CN
China
Prior art keywords
interface
control system
power supply
path
node
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Pending
Application number
CN202310723486.0A
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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 CN202310723486.0A priority Critical patent/CN116800071A/en
Publication of CN116800071A publication Critical patent/CN116800071A/en
Pending legal-status Critical Current

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    • 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
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H02M1/096—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the power supply of the control circuit being connected in parallel to the main switching element

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

The invention provides a power supply center of a frequency converter control system, which comprises a control system connecting end, a linkage system connecting end, an AC 220V working power supply connecting end, a transformer connecting end, a switching power supply connecting end and a fan control system connecting end; the power supply center is connected with the control system, the linkage system, the AC 220V working power supply, the transformer, the switching power supply and the fan control system through the control system connecting end, the linkage system connecting end, the AC 220V working power supply connecting end, the transformer connecting end, the switching power supply and the fan control system connecting end respectively; the power supply center of the frequency converter control system greatly simplifies the circuit in the control cabinet, reduces the difficulty of construction and maintenance, has simple construction, ensures the wiring quality easily, is not easy to have wiring errors, and has good expansion capability.

Description

Power supply center of frequency converter control system
Technical Field
The invention belongs to the technical field of power distribution of control systems, and particularly relates to a power supply center of a frequency converter control system.
Background
In the control system of the frequency converter of the central air conditioner, the controller, the frequency converter and other related equipment generally adopt a low-voltage control system, a common working power supply is AC 24V, and a control power supply is DC 24V. Because the power supply voltage of China is generally AC 220V, an AC 24V power supply is also needed to be provided through a transformer, and a DC 24V power supply is also needed to be provided through a switching power supply. In the prior art, the working power supply and the control power supply of the controller, the frequency converter and related equipment are generally directly connected with the power supply module through wires, and sometimes can be connected with the power supply module through other components, so that the circuit among the controller, the frequency converter, the transformer, the switching power supply and other related components is complicated. Especially when containing many converters in the switch board, too complicated circuit leads to the switch board in the wiring disorder easily, and the wiring error scheduling problem appears easily, causes construction, maintenance difficulty.
Disclosure of Invention
In view of the above, the present invention is directed to overcoming the shortcomings of the prior art, and providing a power supply hub of a control system of a frequency converter.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the power supply center of the frequency converter control system comprises a control system connecting end, a linkage system connecting end, an AC 220V working power supply connecting end, a transformer connecting end, a switching power supply connecting end and a fan control system connecting end which are arranged on a circuit board; the power supply center is connected with the control system, the linkage system, the AC 220V working power supply, the transformer, the switching power supply and the fan control system through the control system connecting end, the linkage system connecting end, the AC 220V working power supply connecting end, the transformer connecting end, the switching power supply and the fan control system connecting end respectively;
the control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 The method comprises the steps of carrying out a first treatment on the surface of the The linkage system connecting end comprises an interface C L1 、C L2 、C L3 、C L4 、C L5 、C L6 、C L7 、C L8 The AC 220V working power supply connection end comprises an interface C A1 、C A2 、C A3 The transformer connecting end comprises an interface C B1 、C B2 、C B3 、C B4 、C B5 The switching power supply connecting end comprises an interface C D1 、C D2 、C D3 、C D4 The fan control system connection end comprises an interface C F1 、C F2 、C F3 ；
The interface C A1 One side is connected with an AC 220V working power supply live wire, and the other side passes through a node C G1 The method is divided into three paths: first-path connecting piezoresistor VDR 1 One side, VDR 1 The other side is connected with node C G2 And then through interface C A2 Connecting an AC 220V working power supply zero line; second-path connection piezoresistor VDR 2 One side, VDR 2 The other side is connected with the interface C A3 Connecting an AC 220V working power ground wire; third path connection node C G3 And at node C G3 The part is divided into two paths again: wherein the first path passes through interface C D2 The primary side AC 220V fire wire of the switching power supply is connected, and the second path is connected with the node C G5 And then respectively pass through the interface C F2 Is connected with an AC 220V live wire at the end of a fan control system and passes through an interface C B2 Connecting an AC 220V live wire on the primary side of the transformer;
the interface C A2 One side is connected with an AC 220V working power supply zero line, and the other side passes through a node C G2 The method is divided into two paths: first-path connecting piezoresistor VDR 1 One side, the second path is connected with the node C G4 And at node C G4 The part is divided into two paths again: first path through interface C D1 The primary side AC 220V zero line end of the switching power supply is connected, and the second path is connected with the node C G6 And then respectively pass through the interface C F1 Connect with the AC 220V zero line of the fan control system end and pass through the interface C B1 The primary side AC 220V zero line of the transformer is connected.
The interface C B3 One side is connected with the primary side self-induction AC 380V of the transformer, and the other side is connected with the relay J FS Normally open contact J FS-1 And then through interface C F3 Connecting fanThe control system end self-inducts AC 380V;
the interface C D3 One side is connected with a DC 24V cathode of a secondary side of the switching power supply, and the other side passes through a node C G12 The method is divided into two paths: first path through interface C L7 The DC 24V cathode of the linkage system end is connected, and the second path passes through an interface C K5 The DC 24V cathode is connected with the control system end;
the interface C D4 One side is connected with a DC 24V positive electrode on the secondary side of the switching power supply, and the other side passes through a node C G11 The method is divided into two paths: first path through interface C L8 The DC 24V anode of the linkage system end is connected, and the second path passes through an interface C K6 The DC 24V anode is connected with the control system end;
the interface C B4 One side is connected with an AC 24V zero line on the secondary side of the transformer, and the other side passes through a node C G7 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 One side; the second path is at node C G9 The part is divided into two paths again: wherein the first path first passes through the node C G13 Connection interface C D3 Then pass through interface C L5 The AC 24V zero line of the linkage system end is connected, and the second path passes through the interface C K7 The AC 24V zero line is connected with the control system end;
the interface C B5 One side is connected with an AC 24V live wire on the secondary side of the transformer, and the other side is connected with a safety FU in series 1 After that, pass through node C G8 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 The other side; the second path is at node C G10 The part is divided into two paths again: wherein the first path passes through interface C L6 The second path is connected with an AC 24V live wire at the linkage system end and passes through an interface C K8 The control system end AC 24V live wire is connected;
the interface C K1 One side is connected with a first linkage control signal of the control system end, and the other side is connected with a first linkage control signal of the control system end through an interface C L1 The first linkage control signal is connected with the linkage system end;
the interface C K2 One side is connected with a second linkage control signal at the control system end, and the other side is connected with a second linkage control signal at the control system end through an interface C L2 Connecting a second linkage control signal of the linkage system end;
the interface C K3 One side is connected withThe other side of the first frequency converter is connected with the operation signal of the first frequency converter at the control system end in series with the safety FU 2 After that, at node C G16 The method is divided into two paths: wherein the first path passes through interface C L4 The first frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode VD 1 Positive electrode, VD 1 Negative electrode connection node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Interface C K4 One side is connected with the operation signal of the second frequency converter at the control system end, and the other side is connected with the safety FU in series 3 After that, at node C G17 The method is divided into two paths: wherein the first path passes through interface C L3 The second frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode V D2 Positive electrode, V D2 The cathode is also connected with node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Node C G15 The other side is divided into two paths: first path series relay J FS Coil, safety FU 4 Rear connection node C G14 The second path is connected with a diode VD 3 Negative electrode, VD 3 Positive electrode same connection node C G14 The method comprises the steps of carrying out a first treatment on the surface of the Node C G14 Another side connection interface C D3 。
Further, the control system comprises a DDC controller, a frequency converter and a control circuit therebetween.
Further, the control system end first frequency converter operation signal and the control system end second frequency converter operation signal are respectively connected with the control system end DC 24V positive electrode through a switch.
Further, the fan control system comprises a fan and a temperature control switch.
Compared with the prior art, the power supply center of the frequency converter control system has the following advantages:
1. the power supply center of the frequency converter control system provided by the invention distributes a standard AC 220V working power supply to a transformer and a switching power supply on one hand, and distributes an AC 24V power supply provided by the transformer and a DC 24V power supply provided by the switching power supply to a plurality of electric equipment such as a control system, a linkage system and the like on the other hand. The transformer, the switching power supply, the control system and the linkage system do not need to be directly connected with any circuit and only need to be connected with a power supply center, so that the circuit in the control cabinet is greatly simplified, and the difficulty of construction and maintenance is reduced;
2. the power supply center of the frequency converter control system provided by the invention is also used as a communication bridge between the control system and the linkage system, so that direct wiring between the control system and the linkage system is further eliminated, and the circuit in the control cabinet is simplified;
3. the invention provides a power supply center of a frequency converter control system, and simultaneously provides two working voltages of AC 220V, AC V for a cooling fan in a control cabinet. If the temperature in the control cabinet is higher than the set value, the fan is driven by the AC 220V voltage to operate at a high speed and rapidly cool down no matter whether the frequency converter operates or not. If the temperature in the cabinet is lower than the set value, the fan is driven by the AC 160V voltage and runs at a low speed only when the frequency converter runs; and when the frequency converter is not running, the fan is stopped. Therefore, the power consumption of the fan can be reduced, and the service life of the fan can be greatly prolonged;
4. the power supply center of the frequency converter control system, which is provided by the invention, can use standard plug terminals with interfaces of an AC 220V power supply, a transformer, a switching power supply, a control system and a linkage system, is simple in construction, ensures the wiring quality easily, and is not easy to have wiring errors;
5. the power supply center of the frequency converter control system provided by the invention can be used for conveniently increasing the number of frequency converters, the number of control signals of the linkage system and the like in the control system and the DC 24V power interface and the AC 24V power interface of the linkage system, and has good expansion capability.
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 schematic diagram of the working principle of a power supply center of a frequency converter control system of the present invention;
fig. 2 is a schematic block diagram of a power supply hub of the inverter control system of the present invention.
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.
1-2, the invention provides a power supply center of a frequency converter control system, which comprises a control system connecting end, a linkage system connecting end, an AC 220V working power supply connecting end, a transformer connecting end, a switching power supply connecting end and a fan control system connecting end; the power supply center is connected with the control system, the linkage system, the AC 220V working power supply, the transformer, the switching power supply and the fan control system through the control system connecting end, the linkage system connecting end, the AC 220V working power supply connecting end, the transformer connecting end, the switching power supply and the fan control system connecting end respectively;
the control system comprises a DDC controller, a frequency converter and a control circuit between the DDC controller and the frequency converter. The DDC controller needs an AC 24V working voltage and a DC 24V control voltage, and outputs a frequency converter operation signal and a control signal needed by a linkage system. In an embodiment of the invention, the control system comprises 2 frequency converters.
The linkage system is an external device related to the control system, such as a fault alarm lamp, a frequency converter operation indicator lamp, various valve groups, sensors and the like, and can be specifically determined according to the use requirements. The invention provides the linkage system with the linkage control signals which comprise the AC 24V working voltage, the DC 24V control voltage, the operation signals of the frequency converter and the direct sending of the control system, and can fully meet the use requirements of various devices.
The AC 220V working power supply is common municipal power supply;
the switching power supply is used for providing DC 24V power, and the working power supply is AC 220V.
The transformer is used for providing an AC 24V power supply, and the working power supply is AC 220V.
The fan control system comprises a control cabinet cooling fan and a temperature control switch, and the start and stop of the fan and the rotating speed are adjusted according to the temperature in the cabinet and the running state of the frequency converter, so that the temperature control in the control cabinet is realized.
The control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 The method comprises the steps of carrying out a first treatment on the surface of the The linkage system connecting end comprises an interface C L1 、C L2 、C L3 、C L4 、C L5 、C L6 、C L7 、C L8 The AC 220V working power supply connection end comprises an interface C A1 、C A2 、C A3 The transformer connecting end comprises an interface C B1 、C B2 、C B3 、C B4 、C B5 The switching power supply connecting end comprises an interface C D1 、C D2 、C D3 、C D4 The fan control system connection end comprises an interface C F1 、C F2 、C F3 ；
The interface C A1 One side is connected with an AC 220V working power supply live wire, and the other side passes through a node C G1 The method is divided into three paths: first-path connecting piezoresistor VDR 1 One side, VDR 1 The other side is connected with node C G2 And then through interface C A2 Connecting an AC 220V working power supply zero line; second-path connection piezoresistor VDR 2 One side, VDR 2 The other side is connected with the interface C A3 Connecting an AC 220V working power ground wire; third path connection node C G3 And at node C G3 The part is divided into two paths again: wherein the first path passes through interface C D2 The primary side AC 220V fire wire of the switching power supply is connected, and the second path is connected with the node C G5 And then respectively pass through the interface C F2 Is connected with an AC 220V live wire at the end of a fan control system and passes through an interface C B2 Connecting an AC 220V live wire on the primary side of the transformer;
the interface C A2 One side is connected with an AC 220V working power supply zero line, and the other side passes through a node C G2 The method is divided into two paths: first-path connecting piezoresistor VDR 1 One side, the second path is connected with the node C G4 And at node C G4 The part is divided into two paths again: first path through interface C D1 The primary side AC 220V zero line of the switching power supply is connected, and the second path is connected with the node C G6 And then respectively pass through the interface C F1 Connect with the AC 220V zero line of the fan control system end and pass through the interface C B1 The primary side AC 220V zero line of the transformer is connected.
The interface C B3 One side is connected with the primary side self-induction AC 380V of the transformer, and the other side is connected with the relay J FS Normally open contact J FS-1 And then through interface C F3 Connecting a fan control system end self-induction AC 380V;
the interface C D3 One side is connected withThe secondary side DC 24V cathode of the switching power supply is connected, and the other side passes through a node C G12 The method is divided into two paths: first path through interface C L7 The DC 24V cathode of the linkage system end is connected, and the second path passes through an interface C K5 The DC 24V cathode is connected with the control system end;
the interface C D4 One side is connected with a DC 24V positive electrode on the secondary side of the switching power supply, and the other side passes through a node C G11 The method is divided into two paths: first path through interface C L8 The DC 24V anode of the linkage system end is connected, and the second path passes through an interface C K6 The DC 24V anode is connected with the control system end;
the interface C B4 One side is connected with an AC 24V zero line on the secondary side of the transformer, and the other side passes through a node C G7 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 One side; the second path is at node C G9 The part is divided into two paths again: wherein the first path first passes through the node C G13 Connection interface C D3 Then pass through interface C L5 The AC 24V zero line of the linkage system end is connected, and the second path passes through the interface C K7 The AC 24V zero line is connected with the control system end;
the interface C B5 One side is connected with an AC 24V live wire on the secondary side of the transformer, and the other side is connected with a safety FU in series 1 After that, pass through node C G8 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 The other side; the second path is at node C G10 The part is divided into two paths again: wherein the first path passes through interface C L6 The second path is connected with an AC 24V live wire at the linkage system end and passes through an interface C K8 The control system end AC 24V live wire is connected;
the interface C K1 One side is connected with a first linkage control signal of the control system end, and the other side is connected with a first linkage control signal of the control system end through an interface C L1 The first linkage control signal is connected with the linkage system end;
the interface C K2 One side is connected with a second linkage control signal at the control system end, and the other side is connected with a second linkage control signal at the control system end through an interface C L2 Connecting a second linkage control signal of the linkage system end;
the interface C K3 One side is connected with the operation signal of the first frequency converter of the control system, and the other side is connected with the safety FU in series 2 After that, at node C G16 The method is divided into two paths: wherein the first path passes through interface C L4 The first frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode VD 1 Positive electrode, VD 1 Negative electrode connection node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Interface C K4 One side is connected with the operation signal of the second frequency converter at the control system end, and the other side is connected with the safety FU in series 3 After that, at node C G17 The method is divided into two paths: wherein the first path passes through interface C L3 The second frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode VD 2 Positive electrode, VD 2 The cathode is also connected with node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Node C G15 The other side is divided into two paths: first path series relay J FS Coil, safety FU 4 Rear connection node C G14 The second path is connected with a diode VD 3 Negative electrode, VD 3 Positive electrode same connection node C G14 The method comprises the steps of carrying out a first treatment on the surface of the Node C G14 Another side connection interface C D3 。
When in use, the power supply center is respectively connected with the control system, the linkage system, the AC 220V working power supply, the transformer, the switch power supply and the fan control system through the interfaces, and the AC 220V working power supply is connected with the air switch K 1 And (5) controlling. K (K) 1 After the power supply center is powered on, the secondary side of the switching power supply outputs DC 24V control power, and the secondary side of the transformer outputs AC 24V working power which is respectively sent to corresponding interfaces of a control system end and a linkage system end.
Wherein, the DC 24V anode of the control system end is connected with a switch K in the control system 3 、K 4 One side, K 3 Another side connection interface C K3 I.e. control the operation signal of the first frequency converter at the system end, K 4 Another side connection interface C K4 I.e. the control system side second frequency converter operation signal. When the first frequency converter is operated, switch K 3 Closing, passing DC 24V+ to interface C K3 Through the insurance FU 2 The latter is transmitted to the corresponding interface of the linkage system end on the one hand and is transmitted to the other hand through a diode VD 1 To relay J FS A coil; when the second frequency converter is operated, switch K 4 Closing, passing DC 24V+ to interface C K4 Through insurance FU 3 The latter is transmitted to the corresponding interface of the linkage system end on the one hand and is transmitted to the other hand through a diode VD 2 To relay J FS A coil. It can be seen that when either inverter is running, relay J FS Are all electrified, and meanwhile, the normally open contact J of the double-pole switch is FS-1 Closing.
The primary side AC 220V live wire and the zero wire of the transformer are respectively connected with the live wire and the zero wire of an external AC 220V working power supply. After the transformer is electrified, the primary side AC 380V live wire end generates AC 380V voltage through a self-induction effect and transmits the AC 380V voltage to a corresponding interface of a fan control system end.
The fan control system comprises a temperature control switch K 2 And a fan. Wherein, temperature control switch K 2 The common point is connected in series with the fan and then is communicated with the live wire of an external AC 22OV working power supply. Temperature control switch K 2 Comprises two contacts, when the ambient temperature is higher than a specific temperature, such as 30 ℃, one side contact is automatically connected; below this temperature, the other side contact is turned on. The contact which is switched on in the high temperature state is connected with the zero line of the working power supply AC 220V, and the contact which is switched on in the low temperature state is connected with the self-induction AC 380V provided by the transformer. When the ambient temperature is higher than 30 ℃, the two sides of the fan are respectively connected with an AC 220V live wire and a zero wire, namely, the fan is at standard working voltage and normally outputs air at high speed. When the ambient temperature is lower than 30 ℃, two cases are classified: if 1 or more converters are running, relay J FS Power-on normally open contact J FS-1 Closing, wherein the two sides of the fan are respectively an AC 220V live wire and a self-induction AC 380V, 160V differential pressure is formed, and the fan rotates at a low speed; if all frequency converters are not operated, J FS-1 In the off state, the fan is not running.
The fan is controlled by temperature, and the fan normally outputs air as long as the temperature exceeds a set value; and secondly, the air is discharged as long as the frequency converter is operated under the control of the operation state of the frequency converter, and only the low-speed operation is maintained when the temperature does not exceed the set value. When the temperature does not exceed the set value and the frequency converter is not operated, the fan stops running. Therefore, the fan can be efficiently utilized, and the service life of the fan is prolonged while electricity is saved.
In the invention, the piezoresistor VDR 1 、VDR 2 The air switch is used for preventing the overvoltage of an AC 220V working power supply, and once the overvoltage occurs, the piezoresistor is conducted, and the air switch is tripped. VDR (VDR) 3 The voltage-sensitive resistor is used for preventing the overvoltage of the AC 24V working power supply, and once the overvoltage occurs, the voltage-sensitive resistor is conducted to ensure the FU 1 And (5) fusing. Safety FU 2 、FU 3 Fuse when the current of the operation signal of the frequency converter is overlarge, and protect FU 4 In relay J FS The coil fuses when the current is excessive. The piezoresistor and the insurance both play a role in protecting the power supply center and modules and equipment connected to the power supply center.
In the invention, diode VD 1 、VD 2 The method is used for preventing interference and avoiding the mutual influence of the operation signals of the first frequency converter and the second frequency converter. Diode VD 3 As a freewheel diode, prevent relay J FS The induced electromotive force on the coil damages the power supply hub after power failure.
In the invention, the power supply center is divided into a high-voltage side and a low-voltage side by taking the switching power supply and the transformer as the centers. The high-voltage side is used for providing an AC 220V working power supply for the switching power supply, the transformer and the fan, the low-voltage side is used for transmitting an AC 24V working power supply provided by the transformer and a DC 24V control power supply provided by the switching power supply to the control system and the linkage system, and the DC 24V power supply is used for outputting the running state of the frequency converter and further used for controlling the fan and the linkage system. In addition, the low pressure side is also provided with a communication line which directly communicates the control system and the linkage system. The transformer, the switching power supply, the control system, the linkage system and the fan do not need to be directly connected with any circuit, and only need to be connected with a power supply center.
The linkage system end provides DC 24V, AC V, a frequency converter operation signal and an interface directly connected with the control system, so that various devices can be flexibly connected according to engineering requirements, and various functions are realized. For example, when a three-wire sensor is connected, power can be supplied by using DC 24V voltage, and feedback is provided to a control system by using a linkage control signal; when the valve is connected, the AC 24V voltage can be used for supplying power, and the linkage control signal is used for controlling the valve to be opened and closed; when the frequency converter operation indicator lamp is connected, an indicator lamp power supply loop can be formed by using the frequency converter operation signal and DC 24V-, and the like.
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 (4)

1. The utility model provides a converter control system power supply center which characterized in that: the device comprises a control system connecting end, a linkage system connecting end, an AC 220V working power supply connecting end, a transformer connecting end, a switching power supply connecting end and a fan control system connecting end which are arranged on a circuit board; the power supply center is connected with the control system, the linkage system, the AC 220V working power supply, the transformer, the switching power supply and the fan control system through the control system connecting end, the linkage system connecting end, the AC 220V working power supply connecting end, the transformer connecting end, the switching power supply and the fan control system connecting end respectively;
the control system connection end comprises an interface C K1 、C K2 、C K3 、C K4 、C K5 、C K6 、C K7 、C K8 The method comprises the steps of carrying out a first treatment on the surface of the The linkage system connecting end comprises an interface C L1 、C L2 、C L3 、C L4 、C L5 、C L6 、C L7 、C L8 The AC 220V working power supply connection end comprises an interface C A1 、C A2 、C A3 The transformer connecting end comprises an interface C B1 、C B2 、C B3 、C B4 、C B5 The switching power supply connecting end comprises an interface C D1 、C D2 、C D3 、C D4 The fan control system connection end comprises an interface C F1 、C F2 、C F3 ；
The interface C A1 One side is connected with an AC 220V working power supply live wire, and the other side passes through a node C G1 The method is divided into three paths: first-path connecting piezoresistor VDR 1 One side, VDR 1 The other side is connected with node C G2 And then through interface C A2 ConnectionAn AC 220V working power supply zero line; second-path connection piezoresistor VDR 2 One side, VDR 2 The other side is connected with the interface C A3 Connecting an AC 220V working power ground wire; third path connection node C G3 And at node C G3 The part is divided into two paths again: wherein the first path passes through interface C D2 The primary side AC 220V fire wire of the switching power supply is connected, and the second path is connected with the node C G5 And then respectively pass through the interface C F2 Is connected with an AC 220V live wire at the end of a fan control system and passes through an interface C B2 Connecting an AC 220V live wire on the primary side of the transformer;
the interface C A2 One side is connected with an AC 220V working power supply zero line, and the other side passes through a node C G2 The method is divided into two paths: first-path connecting piezoresistor VDR 1 One side, the second path is connected with the node C G4 And at node C G4 The part is divided into two paths again: first path through interface C D1 The primary side AC 220V zero line of the switching power supply is connected, and the second path is connected with the node C G6 And then respectively pass through the interface C F1 Connect with the AC 220V zero line of the fan control system end and pass through the interface C B1 Connecting a primary side AC 220V zero line of a transformer;
the interface C B3 One side is connected with the primary side self-induction AC 380V of the transformer, and the other side is connected with the relay J FS Normally open contact J FS-1 And then through interface C F3 Connecting a fan control system end self-induction AC 380V;
the interface C D3 One side is connected with a DC 24V cathode of a secondary side of the switching power supply, and the other side passes through a node C G12 The method is divided into two paths: first path through interface C L7 The DC 24V cathode of the linkage system end is connected, and the second path passes through an interface C K5 The DC 24V cathode is connected with the control system end;
the interface C D4 One side is connected with a DC 24V positive electrode on the secondary side of the switching power supply, and the other side passes through a node C G11 The method is divided into two paths: first path through interface C L8 The DC 24V anode of the linkage system end is connected, and the second path passes through an interface C K6 The DC 24V anode is connected with the control system end;
the interface C B4 One side is connected with an AC 24V zero line on the secondary side of the transformer, and the other side is connected with the other sideSide pass node C G7 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 One side; the second path is at node C G9 The part is divided into two paths again: wherein the first path first passes through the node C G13 Connection interface C D3 Then pass through interface C L5 The AC 24V zero line of the linkage system end is connected, and the second path passes through the interface C K7 The AC 24V zero line is connected with the control system end;
the interface C B5 One side is connected with an AC 24V live wire on the secondary side of the transformer, and the other side is connected with a safety FU in series 1 After that, pass through node C G8 The method is divided into two paths: wherein the first path is connected with a piezoresistor VDR 3 The other side; the second path is at node C G10 The part is divided into two paths again: wherein the first path passes through interface C L6 The second path is connected with an AC 24V live wire at the linkage system end and passes through an interface C K8 The control system end AC 24V live wire is connected;
the interface C K1 One side is connected with a first linkage control signal of the control system end, and the other side is connected with a first linkage control signal of the control system end through an interface C L1 The first linkage control signal is connected with the linkage system end;
the interface C K2 One side is connected with a second linkage control signal at the control system end, and the other side is connected with a second linkage control signal at the control system end through an interface C L2 Connecting a second linkage control signal of the linkage system end;
the interface C K3 One side is connected with the operation signal of the first frequency converter at the control system end, and the other side is connected with the safety FU in series 2 After that, at node C G16 The method is divided into two paths: wherein the first path passes through interface C L4 The first frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode VD 1 Positive electrode, VD 1 Negative electrode connection node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Interface C K4 One side is connected with the operation signal of the second frequency converter at the control system end, and the other side is connected with the safety FU in series 3 After that, at node C G17 The method is divided into two paths: wherein the first path passes through interface C L3 The second frequency converter operation signal of the linkage system end is connected, and the second path is connected with a diode VD 2 Positive electrode, VD 2 The cathode is also connected with node C G15 The method comprises the steps of carrying out a first treatment on the surface of the Node C G15 The other side is divided into two paths: first path series relay J FS CoilSafety FU 4 Rear connection node C G14 The second path is connected with a diode VD 3 Negative electrode, VD 3 Positive electrode same connection node C G14 The method comprises the steps of carrying out a first treatment on the surface of the Node C G14 Another side connection interface C D3 。
2. A power supply hub for a frequency converter control system according to claim 1, wherein: the control system comprises a DDC controller, a frequency converter and a control circuit therebetween.
3. A power supply hub for a frequency converter control system according to claim 2, wherein: the control system end first frequency converter operation signal and the control system end second frequency converter operation signal are respectively connected with the control system end DC 24V positive electrode through a switch.
4. A power supply hub for a frequency converter control system according to claim 1, wherein: the fan control system comprises a fan and a temperature control switch.
CN202310723486.0A 2023-06-19 2023-06-19 Power supply center of frequency converter control system Pending CN116800071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310723486.0A CN116800071A (en) 2023-06-19 2023-06-19 Power supply center of frequency converter control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310723486.0A CN116800071A (en) 2023-06-19 2023-06-19 Power supply center of frequency converter control system

Publications (1)

Publication Number Publication Date
CN116800071A true CN116800071A (en) 2023-09-22

Family

ID=88035643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310723486.0A Pending CN116800071A (en) 2023-06-19 2023-06-19 Power supply center of frequency converter control system

Country Status (1)

Country Link
CN (1) CN116800071A (en)

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