CN218995493U

CN218995493U - Novel voltage detection module

Info

Publication number: CN218995493U
Application number: CN202223101338.5U
Authority: CN
Inventors: 万克信; 王涛; 贾金龙
Original assignee: Haotiman Induction Equipment Shanghai Co ltd
Current assignee: Haotiman Induction Equipment Shanghai Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-05-09
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses a novel voltage detection module in the technical field of medium-frequency induction furnaces, which comprises an electronic transformer TR1, a rectifier bridge B1, a passive RC low-pass filter circuit, a first-order active low-pass filter circuit, an amplifying circuit, a P1 interface and an X2 interface, wherein the output end of the amplifying circuit is connected with a resistor R31 in series, the other end of the resistor R31 is connected with an X3 interface in series, a No. 3 pin of the X3 interface is connected with a resistor R32 in series, the other end of the resistor R32 is grounded, the P1 interface is used for inputting 220V voltage to the voltage detection module, and the P1 interface is used for providing + -15V voltage for an external operational amplifier after rectification and voltage stabilization; the X2 interface is used for externally connecting a transformer in a power supply of the two intermediate frequency induction system, pins 1 and 3 of the X2 interface respectively output + -15V voltage sources to the externally connected transformer, the interface 2 receives output signals from the externally connected transformer, the output signals are output by the X3 interface after passive filtering, active filtering and amplification, and the X3 interface is externally connected with a main control module for calculating power.

Description

Novel voltage detection module

Technical Field

The utility model relates to the technical field of medium-frequency induction furnaces, in particular to a novel voltage detection module.

Background

The system is characterized in that a set of power supply is used for controlling a load independently, namely a smelting furnace, in the smelting process, only one smelting furnace can be started independently, and after smelting is finished, the smelting furnace is switched to the other smelting furnace through a change-over switch, so that two problems can occur, firstly, if the smelting furnace cannot be emptied immediately after smelting, the iron cannot be preserved, heat can be dissipated, and secondly, each switching action is very complicated. In a one-to-two system, the power of two furnaces can be switched at will, when one furnace is used for smelting, the other furnace can input low power to keep the temperature of molten iron, and the silicon controlled rectifier series intermediate frequency smelting furnace regulates the power in a frequency modulation mode, so that the whole smelting process almost keeps constant power output. When the series inverter power supply works, rectification is realized by controlling the inversion trigger pulse frequency under a certain conduction angle, and one-to-two regulation can be realized at the same time, however, the current series inverter system electric furnace cannot obtain the accurate power of two sets of systems in real time, and for one-to-two intermediate frequency induction system power supply, a set of rectifying device is usually needed, after power frequency electricity is rectified into direct current, two sets of series inverter devices pass through, and when two sets of loads work at the same time, in order to facilitate the regulation and monitoring of the power of the two sets of systems, a set of transformer and a voltage detection module are added to the two sets of inverter systems respectively to provide voltage and current information for a main control module unit, and the main control module calculates and distributes power, so that a voltage detection assembly for power acquisition needs to be designed.

Disclosure of Invention

The present utility model is directed to a novel voltage detection module, so as to solve the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a novel voltage detection module, includes electronic transformer TR1, rectifier bridge B1, passive RC low pass filter circuit, first order active low pass filter circuit and amplifier circuit, electronic transformer TR 1's L230V port has connect in parallel signal socket J1 and P1 interface, P1 interface's 1 number pin has connect in series fuse F1, fuse F1's the other end has connect in parallel signal socket J4 and electronic transformer TR 1's N230V port, electronic transformer TR 1's L115V port and N115V port have all connect in series signal sockets J2, J3, J5 and J6, connect in series rectifier bridge B1 between electronic transformer TR 1's the low voltage end, rectifier bridge B1's output positive power supply end has connect in parallel capacitor C1 and chip U1, capacitor C1's the other end has connect in parallel ground wire, capacitor C2, capacitor C3, capacitor C4, chip U1's GND end and chip U2's GND end, the VOUT port of the chip U1 is connected with the other end of a capacitor C3, a resistor R51, an X2 interface and a first output U+ port in parallel, the other end of the resistor R51 is connected with a light-emitting diode D2 in series, the other end of the light-emitting diode D2 is connected with a common diode D1 in series, the positive electrode of the common diode D1 is connected with the other end of the capacitor C4, the VOUT port of the chip U2, a No. 1 pin of the X2 interface and the first output U-port, the other end of the capacitor C2 is connected with the VIN port of the chip U2 in parallel and the output negative power end of a rectifier bridge B1 in parallel, the No. 2 pin of the X2 interface is connected with a passive RC low-pass filter circuit, the passive RC low-pass filter circuit is connected with a first-order active low-pass filter circuit, the first-order active low-pass filter circuit is connected with an amplifying circuit, the output end of the amplifying circuit is connected with a resistor R31 in series, the other end of the resistor R31 is connected with the X3 interface in series, the No. 3 pin of the X3 interface is connected with a resistor R32 in series, the other end of the resistor R32 is grounded.

Preferably, the passive RC low-pass filter circuit comprises a resistor R1 and a resistor R2C which are connected with a No. 2 pin of the X2 interface, and a capacitor C32 and a first-order active low-pass filter circuit are connected between the other ends of the resistor R1 and the resistor R2C in parallel.

Preferably, the first-order active low-pass filter circuit comprises a resistor R2B connected in series with a resistor R2C, the other end of the resistor R2B is connected with a resistor R2A and a capacitor CW1 in parallel, the other end of the resistor R2A is connected with a capacitor C31 and an anode input end of an operational amplifier U3C in parallel, the other end of the capacitor C31 is grounded and connected with the resistor R1, a cathode input end of the operational amplifier U3C is connected with the other end of the capacitor CW1 and an output end of the operational amplifier U3C in parallel, and an amplifying circuit is connected between the output end of the operational amplifier U3C and a ground wire.

Preferably, the amplifying circuit includes a resistor R3 connected in series with an output end of the operational amplifier U3C, the other end of the resistor R3 is connected in parallel with a negative input end of the operational amplifier U3A and a resistor R2D, an positive input end of the operational amplifier U3A is connected with a ground wire, a negative power supply connection end of the operational amplifier U3A is connected in parallel with a capacitor C11 and a second output U-port, the other end of the capacitor C11 is grounded, a positive power supply connection end of the operational amplifier U3A is connected in parallel with a capacitor C41 and a second output u+ port, the other end of the capacitor C41 is grounded, and the other end of the resistor R2D is connected with an output end of the operational amplifier U3A and the resistor R31.

Preferably, the models of the chips U1 and U2 are L7815CV and L7915CV respectively, and the models of the operational amplifiers U3A and U3C are the same, and are LF347N.

Compared with the prior art, the utility model has the beneficial effects that: the P1 interface is used for inputting 220V voltage to the voltage detection module, and providing + -15V voltage for the external operational amplifier after rectification and voltage stabilization; the X2 interface is used for externally connecting a transformer in a power supply of the two intermediate frequency induction system,

pins

1 and 3 of the X2 interface respectively output + -15V voltage sources to the externally connected transformer, the interface 2 receives output signals from the externally connected transformer, the output signals are output by the X3 interface after passive filtering, active filtering and amplification, and the X3 interface is externally connected with a main control module for calculating power.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic circuit diagram of the present utility model;

FIG. 2 is a diagram illustrating the operation of the present utility model;

fig. 3 is a schematic circuit diagram of the

inverter modules

1 and 2 in fig. 2.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1, the present utility model provides a technical solution: a novel voltage detection module comprises an electronic transformer TR1, a rectifier bridge B1, a passive RC low-pass filter circuit, a first-order active low-pass filter circuit and an amplifying circuit, wherein an L230V port of the electronic transformer TR1 is connected with signal sockets J1 and P1 interfaces in parallel, a No. 1 pin of the P1 interface is connected with a fuse F1 in series, the other end of the fuse F1 is connected with a signal socket J4 and an N230V port of the electronic transformer TR1 in parallel, both the L115V port and the N115V port of the electronic transformer TR1 are connected with signal sockets J2, J3, J5 and J6 in series, the rectifier bridge B1 is connected between low-voltage ends of the electronic transformer TR1 in series, an output positive power end of the rectifier bridge B1 is connected with a capacitor C1 and a chip U1 in parallel, the other end of the capacitor C1 is connected with a ground wire, a capacitor C2, a capacitor C3, a capacitor C4, a GND end of the chip U1 and a GND end of the chip U2 in parallel, the VOUT port of the chip U1 is connected with the other end of the capacitor C3, the resistor R51, the X2 interface and the first output U+ port in parallel, the other end of the resistor R51 is connected with the light-emitting diode D2 in series, the other end of the light-emitting diode D2 is connected with the common diode D1 in series, the positive electrode of the common diode D1 is connected with the other end of the capacitor C4, the VOUT port of the chip U2, the No. 1 pin of the X2 interface and the first output U-port, the other end of the capacitor C2 is connected with the VIN port of the chip U2 in parallel and the output negative power supply end of the rectifier bridge B1 in parallel, the No. 2 pin of the X2 interface is connected with the passive RC low-pass filter circuit, the passive RC low-pass filter circuit is connected with the first-order active low-pass filter circuit, the output end of the amplifier circuit is connected with the resistor R31 in series, the other end of the resistor R31 is connected with the X3 interface in series, the No. 3 pin of the X3 interface is connected with the resistor R32 in series, and the other end of the resistor R32 is grounded.

The passive RC low-pass filter circuit comprises a resistor R1 and a resistor R2C which are connected with a No. 2 pin of the X2 interface, and a capacitor C32 and a first-order active low-pass filter circuit are connected between the other ends of the resistor R1 and the resistor R2C in parallel; the first-order active low-pass filter circuit comprises a resistor R2B connected in series with a resistor R2C, wherein the other end of the resistor R2B is connected with a resistor R2A and a capacitor CW1 in parallel, the other end of the resistor R2A is connected with a capacitor C31 and an anode input end of an operational amplifier U3C in parallel, the other end of the capacitor C31 is grounded and connected with the resistor R1, a cathode input end of the operational amplifier U3C is connected with the other end of the capacitor CW1 and an output end of the operational amplifier U3C in parallel, and an amplifying circuit is connected between the output end of the operational amplifier U3C and a ground wire; the amplifying circuit comprises a resistor R3 connected in series with the output end of the operational amplifier U3C, the other end of the resistor R3 is connected with the negative electrode input end of the operational amplifier U3A and a resistor R2D in parallel, the positive electrode input end of the operational amplifier U3A is connected with a ground wire, the negative power supply connection end of the operational amplifier U3A is connected with a capacitor C11 and a second output U-port in parallel, the other end of the capacitor C11 is grounded, the positive power supply connection end of the operational amplifier U3A is connected with a capacitor C41 and a second output U+ port in parallel, the other end of the capacitor C41 is grounded, and the other end of the resistor R2D is connected with the output end of the operational amplifier U3A and the resistor R31; the models of the chips U1 and U2 are L7815CV and L7915CV respectively, and the models of the operational amplifiers U3A and U3C are the same, and are LF347N.

When the novel voltage detection module is used, the voltage detection module comprises: as shown in fig. 2, a transformer 1, a transformer 2, an inverter module 1, an inverter module 2, a voltage detection module 1, a voltage detection module 2, a load 1, a load 2 and a main control module are connected, wherein the

transformers

1 and 2 are identical, the

inverter modules

1 and 2 are identical, the

voltage detection modules

1 and 2 are identical, the circuit diagrams of the

inverter modules

1 and 2 are shown in fig. 3, and two sets of inverter modules are connected in series, so that the current is identical through the two sets of inverter modules, and the power distribution of two loads can be calculated only by detecting the voltage of the two sets of inverter modules according to p=ui, so that the parallel resonance one-to-two power distribution is realized; the voltage of the inversion module 1 is detected through the transformer 1, the voltage is filtered and amplified through the voltage detection module 1, the filtered and amplified signal is transmitted into the main control module, and the main control module calculates the power of the load 1; the voltage of the inversion module 2 is detected through the transformer 2, the voltage is filtered and amplified through the voltage detection module 2, the filtered and amplified signal is transmitted into the main control module, and the main control module calculates the power of the load 2.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a novel voltage detection module, includes electronic transformer TR1, rectifier bridge B1, passive RC low pass filter circuit, first order active low pass filter circuit and amplifier circuit, its characterized in that: the L230V port of the electronic transformer TR1 is connected with the signal socket J1 and the P1 interface in parallel, the No. 1 pin of the P1 interface is connected with the fuse F1 in series, the other end of the fuse F1 is connected with the signal socket J4 and the N230V port of the electronic transformer TR1 in parallel, the L115V port and the N115V port of the electronic transformer TR1 are connected with the signal sockets J2, J3, J5 and J6 in series, the low voltage end of the electronic transformer TR1 is connected with the rectifying bridge B1 in series, the output positive power end of the rectifying bridge B1 is connected with the capacitor C1 and the chip U1 in parallel, the other end of the capacitor C1 is connected with the ground wire, the capacitor C2, the capacitor C3, the capacitor C4, the GND end of the chip U1 and the GND end of the chip U2 in parallel, the other end of the chip U1 is connected with the other end of the capacitor C3, the resistor R51, the X2 interface and the first output U+ port are connected with the other end of the resistor R51 in series, the other end of the LED D2 is connected with the LED D1, the common filter circuit is connected with the input end of the filter circuit C1 and the filter circuit C2 in series, the filter circuit is connected with the output end of the filter circuit C2 in series, the filter circuit is connected with the filter circuit in series with the output end of the filter circuit in series, and the filter circuit is connected with the filter circuit in series with the other end of the filter circuit in series, and the filter circuit is connected with the filter circuit in series with the filter circuit has the input end 3.

2. The novel voltage detection module of claim 1, wherein: the passive RC low-pass filter circuit comprises a resistor R1 and a resistor R2C which are connected with a No. 2 pin of the X2 interface, and a capacitor C32 and a first-order active low-pass filter circuit are connected between the other ends of the resistor R1 and the resistor R2C in parallel.

3. The novel voltage detection module of claim 2, wherein: the first-order active low-pass filter circuit comprises a resistor R2B connected with a resistor R2C in series, the other end of the resistor R2B is connected with a resistor R2A and a capacitor CW1 in parallel, the other end of the resistor R2A is connected with a capacitor C31 and an anode input end of an operational amplifier U3C in parallel, the other end of the capacitor C31 is grounded and connected with the resistor R1, a cathode input end of the operational amplifier U3C is connected with the other end of the capacitor CW1 and an output end of the operational amplifier U3C in parallel, and an amplifying circuit is connected between the output end of the operational amplifier U3C and a ground wire.

4. A novel voltage detection module according to claim 3, wherein: the amplifying circuit comprises a resistor R3 connected in series with the output end of the operational amplifier U3C, the other end of the resistor R3 is connected with the negative input end of the operational amplifier U3A and a resistor R2D in parallel, the positive input end of the operational amplifier U3A is connected with a ground wire, the negative power supply connection end of the operational amplifier U3A is connected with a capacitor C11 and a second output U-port in parallel, the other end of the capacitor C11 is grounded, the positive power supply connection end of the operational amplifier U3A is connected with a capacitor C41 and a second output U+ port in parallel, the other end of the capacitor C41 is grounded, and the other end of the resistor R2D is connected with the output end of the operational amplifier U3A and the resistor R31.

5. The novel voltage detection module of claim 4, wherein: the models of the chips U1 and U2 are L7815CV and L7915CV respectively, and the models of the operational amplifier U3A and U3C are the same, and are LF347N.