CN215956048U

CN215956048U - XRT intelligence ore sorting facilities sensor power filtering steady voltage system

Info

Publication number: CN215956048U
Application number: CN202121595464.3U
Authority: CN
Inventors: 曾军兰; 闵湘川; 张林新; 周强
Original assignee: Hunan Jumper Technology Co ltd
Current assignee: Hunan Jumper Technology Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-03-04
Anticipated expiration: 2031-07-14

Abstract

The utility model discloses a power supply filtering and voltage stabilizing system of an XRT intelligent ore sorting equipment sensor, which comprises a double-conversion online UPS, a pre-filter, an AC-DC power supply module and a surge overvoltage protection module; the double-conversion online UPS, the pre-filter, the AC-DC power module and the surge overvoltage protection module are sequentially connected. The double-conversion online UPS can well eliminate voltage fluctuation, waveform distortion, frequency fluctuation and surge interference from a mains supply in an operating device, the pre-filter has larger attenuation to interference signals with higher frequency and can eliminate the interference signals with higher frequency, and the surge overvoltage protection module is arranged between the AC-DC power supply module and the X-ray imaging detection card and the X-ray image transmission card to realize an overvoltage protection function. This power filtering steady voltage system can solve power supply conducted interference, surge interference, improves the power supply quality, improves XRT intelligence ore sorting equipment imaging system image quality, increase of service life.

Description

XRT intelligence ore sorting facilities sensor power filtering steady voltage system

Technical Field

The utility model relates to the field of intelligent ore sorting equipment, in particular to a sensor power supply filtering and voltage stabilizing system of XRT intelligent ore sorting equipment.

Background

The intelligent ore sorting equipment is based on dual-energy X-ray perspective and material identification, utilizes a machine vision detection technology and a neural network algorithm, a big data deep learning training and other artificial intelligent technologies, accurately analyzes and identifies each ore, and realizes effective separation and sorting of the ore and the waste rock by adopting accurate striking of a high-speed air discharging gun.

An X-ray imaging detection card and an X-ray image transmission card in the XRT intelligent ore sorting system are one of key precise electronic devices, and the normal operation of the X-ray imaging detection card and the X-ray image transmission card is directly related to the performance and stability of equipment.

The intelligent ore sorting equipment is suitable for mine enterprises such as ore dressing plants, mining fields, slag and rock stacking fields and the like and metallurgical enterprises for sorting metallurgical production waste materials. High-voltage and high-power electrical equipment such as a stone crusher, a lifter, a fan, a water pump coal mining machine, a belt conveyor and the like are used in a large amount in a modern mine enterprise power grid, the equipment is often in a light-load state in the operation process, the operation power factor is low, and meanwhile, the equipment generates a large amount of harmonic waves in the starting and stopping stage, so that the voltage of a power supply bus generates fluctuation. In addition, in a mine power supply system, a large amount of frequency conversion and rectification are required, and equipment for frequency conversion and rectification is generally a nonlinear load and generates harmonic waves. The presence of harmonics can also distort the system voltage. Through detection of an oscilloscope, at the moment when a contactor in XRT intelligent ore sorting equipment is switched on and other nearby frequency conversion equipment (an air compressor and a conveying belt) is started and stopped, a spike pulse interference signal is input into power supply of an X-ray image transmission card. The long-term continuous interference of the power supply input of the X-ray imaging detection card and the X-ray image transmission card can directly influence the quality of an X-ray imaging image, and has great interference on the accurate identification of ores so as to form direct and harmful influence on the indexes of ore separation; the high voltage pulse input of the power supply of the X-ray imaging detection card and the X-ray image transmission card can also cause the damage of the X-ray imaging detection card and the X-ray image transmission card at any time, and the service life of the X-ray imaging detection card and the X-ray image transmission card is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power supply filtering and voltage stabilizing system of an XRT intelligent ore sorting equipment sensor, which is used for solving power supply conduction interference and surge interference and improving power supply quality.

A sensor power supply filtering and voltage stabilizing system of XRT intelligent ore sorting equipment comprises a double-conversion online UPS, a pre-filter, an AC-DC power supply module and a surge overvoltage protection module; the double-conversion online UPS, the pre-filter, the AC-DC power module and the surge overvoltage protection module are sequentially connected.

The mains supply is connected into a double-conversion online UPS, the double-conversion online UPS can well eliminate voltage fluctuation, waveform distortion, frequency fluctuation and surge interference from the mains supply when operating devices, a pre-filter has large attenuation to interference signals with high frequency and can eliminate the interference signals with high frequency, and the surge overvoltage protection module is arranged between the AC-DC power supply module and the X-ray imaging detection card and the X-ray image transmission card to realize the overvoltage protection function.

Further, the double-conversion online UPS comprises a rectifier, an inverter, a storage battery and a static switch, the rectifier, the inverter and the static switch are sequentially connected to the double-conversion online UPS from an input end to an output end, and the storage battery is connected to the output end of the rectifier; the input end of the double conversion online UPS is provided with a bypass which is connected to the static switch.

The mine power grid with poor quality is firstly changed into a direct current stabilized power supply through a rectifier inside a double-conversion online UPS, and then the direct current power supply is changed into a pure high-quality sine wave power supply again in an inverter by utilizing pulse width modulation. When the power grid fails or is completely powered off, the storage battery pack in the double-conversion online UPS is used for continuously providing direct-current energy for the inverter, so that the inverter power supply of the double-conversion online UPS can continuously provide high-quality alternating-current power supply for the load in a sine wave power supply mode without time interruption or waveform disturbance. The filtering function of the double-conversion online UPS is completed by an energy storage battery. The double-conversion online UPS is internally provided with a large-capacity battery which is equivalent to a large-capacity capacitor. Because the voltage at two ends of the capacitor cannot change suddenly, namely the transient pulse interference is eliminated by using the smooth characteristic of the capacitor to the pulse, the method is also called as interference shielding.

Further, the prefilter comprises capacitors C1-C5, common mode inductors L1 and L2; a capacitor C1, a common mode inductor L1, a capacitor C2, capacitors C3 and C4 which are connected in series, a common mode inductor L2 and a capacitor C5 are connected in sequence from the input end to the output end of the pre-filter; and the capacitors C3 and C4 are grounded.

The pre-filter is composed of a low-pass filter circuit consisting of an inductor and a capacitor, and has large attenuation to interference signals with high frequency. Since the interference signal has both differential mode and common mode, the pre-filter has an attenuation effect on both of these interferences. Capacitors C3 and C4 are connected across the output terminals and the midpoint of capacitors C3 and C4 is grounded, which effectively suppresses common mode interference. The capacitors C1, C2 and C5 are mainly used for filtering differential mode interference signals.

Furthermore, the capacitance ranges of the capacitors C3 and C4 are 2200 pF-0.1 muF, the capacitance ranges of the capacitors C1, C2 and C5 are 0.01 muF-0.47 muF, and the inductance ranges of the common-mode inductors L1 and L2 are 10 mH-33 mH.

Further, the surge overvoltage protection module comprises an LT4363 surge suppressor, resistors R1-R7, a diode D1, a MOSFET, capacitors C7-C10 and capacitors C12-C15; the surge overvoltage protection module is connected with one end of a capacitor C7, a capacitor C8, a capacitor C15 and a resistor R4 and a D pole of an MOSFET in sequence from an input end to an output end, an S pole of the MOSFET is connected with one end of a resistor R3 and an SNS pin of an LT4363 surge suppressor, the other end of the resistor R3 is connected with an OUT pin of the LT4363 surge suppressor, a resistor R1, a capacitor C13, a capacitor C9 and one end of a capacitor C10 in sequence, the other end of the resistor R1 is connected with an FB pin of the LT4363 surge suppressor and one end of a resistor R2, and the other end of the resistor R2 is grounded; the surge overvoltage protection module is sequentially connected with the other ends of the capacitor C7, the capacitor C8, the capacitor C15, the capacitor C12, the diode D1, the resistor R7, the capacitor C13, the capacitor C9 and the capacitor C10 from the input end to the negative electrode of the output end; the other end of the capacitor C12 is connected with the other end of the resistor R4, the other end of the diode D1 and the SHDN pin of the LT4363 surge suppressor, the other end of the resistor R7 is connected with the UV pin of the LT4363 surge suppressor and one end of the resistor R6, the other end of the resistor R6 is connected with the VCC pin of the LT4363 surge suppressor, the G pole of the MOSFET is connected with the GATE pin of the LT4363 surge suppressor through the resistor R5, and the TMR pin of the LT4363 surge suppressor is grounded through the capacitor C14.

The working principle of the surge overvoltage protection module is as follows: the LT4356 surge suppressor has high rated input voltage, can process transient voltage of 100V and higher, and provides reverse input protection as low as-60V without damaging itself or the load. The LT4363 surge suppressor has a clamping voltage arranged inside, when the input voltage is greater than the clamping voltage, the LT4363 surge suppressor can react to enter an overvoltage protection mode to ensure that the output voltage does not exceed the clamping voltage, two resistors are connected to an external feedback pin FB of the LT4363 surge suppressor, a voltage comparator is arranged in the internal structure of the LT4363 surge suppressor, a positive phase input end of the internal voltage comparator of the LT4363 surge suppressor is connected with the feedback pin FB, a negative phase input end of the voltage comparator is connected with a reference voltage of 1.275V, and the output level of the GATE pin of the LT4363 surge suppressor is controlled by comparing the voltage of the positive phase input end of the voltage comparator with the reference voltage of the negative phase input end of the voltage comparator, so that the on-off of an external MOSFET is controlled. So as to achieve the protection purpose. When the voltage of the positive phase input end of the voltage comparator is greater than the reference voltage of the negative phase input end of the voltage comparator, the LT4363 surge suppressor GATE pin outputs low level, and the N-channel MOSFET connected with the GATE pin is immediately turned off, so that the overvoltage protection function is realized.

Advantageous effects

The utility model provides a sensor power supply filtering and voltage stabilizing system of XRT intelligent ore sorting equipment, wherein mains supply is connected into a double-conversion online UPS, the double-conversion online UPS can well eliminate voltage fluctuation, waveform distortion, frequency fluctuation and surge interference from the mains supply in a running device, a pre-filter has larger attenuation to interference signals with higher frequency and can eliminate the interference signals with higher frequency, and a surge overvoltage protection module is arranged between an AC-DC power supply module and an X-ray imaging detection card and an X-ray image transmission card to realize an overvoltage protection function. Through this power filtering steady voltage system, can solve power supply conduction interference, surge interference, improve the power supply quality, can improve XRT intelligence ore sorting equipment imaging system image quality, increase of service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sensor power supply filtering and voltage stabilizing system of an XRT intelligent ore sorting device provided by an embodiment of the utility model;

FIG. 2 is a schematic diagram of a dual conversion online UPS circuit provided by an embodiment of the present invention;

FIG. 3 is a schematic circuit diagram of a prefilter provided by an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a surge overvoltage protection module according to an embodiment of the utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The embodiment of the utility model provides a power supply filtering and voltage stabilizing system of an XRT intelligent ore sorting equipment sensor, which comprises a double-conversion online UPS 1, a pre-filter 2, an AC-DC power supply module 3 and a surge overvoltage protection module 4; the double-conversion online UPS 1, the pre-filter 2, the AC-DC power module 3 and the surge overvoltage protection module 4 are connected in sequence.

The mains supply is connected into the double-conversion online UPS 1, voltage fluctuation, waveform distortion, frequency fluctuation and surge interference from the mains supply can be well eliminated when the double-conversion online UPS 1 operates devices, the pre-filter 2 has large attenuation on interference signals with high frequency and can eliminate the interference signals with high frequency, and the surge overvoltage protection module 4 is arranged between the AC-DC power supply module 3 and the X-ray imaging detection card and the X-ray image transmission card to realize an overvoltage protection function.

Specifically, as shown in fig. 2, the dual-conversion online UPS 1 includes a rectifier, an inverter, a storage battery, and a static switch, the rectifier, the inverter, and the static switch are sequentially connected to the dual-conversion online UPS from an input end to an output end, and the storage battery is connected to the output end of the rectifier; the input end of the double conversion online UPS is provided with a bypass which is connected to the static switch.

The double conversion online UPS 1 is composed of a rectifier, an inverter, a battery, and the like. The commercial power is charged for the storage battery through the direct current with controllable voltage and current output by the rectifier, so that the storage battery stores electric energy, meanwhile, the commercial power supplies the direct current to the inverter after alternating current/direct current conversion is realized by the rectifier, and the inverter outputs the alternating current with constant voltage and constant frequency after the direct current/alternating current conversion is realized, so as to supply power to the load. By adopting the AC/DC and DC/AC double-conversion design, the double-conversion online UPS 1 can better eliminate voltage fluctuation, waveform distortion, frequency fluctuation and surge interference from the mains supply during the operation.

The mine power grid with poor quality is firstly changed into a direct current stabilized power supply through a rectifier inside the double-conversion online UPS 1, and then the direct current power supply is changed into a pure high-quality sine wave power supply again in the inverter by utilizing pulse width modulation. When the power grid fails or completely fails, the storage battery pack in the double-conversion online UPS 1 is used for continuously providing direct-current energy for the inverter, so that the inverter power supply of the double-conversion online UPS 1 can continuously provide high-quality alternating-current power supply for the load in a sine wave power supply mode without time interruption or waveform disturbance. The filtering function of the double-conversion online UPS 1 is completed by an energy storage battery. The double conversion online UPS 1 is internally provided with a large-capacity battery which is equivalent to a large-capacity capacitor. Because the voltage at two ends of the capacitor cannot change suddenly, namely the transient pulse interference is eliminated by using the smooth characteristic of the capacitor to the pulse, the method is also called as interference shielding.

As shown in fig. 3, the prefilter 2 includes capacitors C1-C5, common mode inductors L1 and L2; a capacitor C1, a common mode inductor L1, a capacitor C2, capacitors C3 and C4 which are connected in series, a common mode inductor L2 and a capacitor C5 are connected in sequence from the input end to the output end of the prefilter 2; and the capacitors C3 and C4 are grounded.

The pre-filter 2 is composed of a low-pass filter circuit composed of an inductor and a capacitor, and has large attenuation to interference signals with high frequency. Since the interference signal has both differential mode and common mode, the pre-filter has an attenuation effect on both of these interferences. The capacitors C3 and C4 are connected across the output end, and the midpoint of the capacitors C3 and C4 is grounded, so that common-mode interference can be effectively inhibited; the capacitance range of the capacitors C3 and C4 is 2200 pF-0.1 muF, and the capacitance does not exceed 0.1 muF in order to reduce the leakage current. The capacitors C3 and C4 are capacitors for filtering common mode interference, and are generally called Y capacitors. The capacitors C1, C2 and C5 are film capacitors, the capacitance range of the capacitors C1, C2 and C5 is 0.01-0.47 muF, and the capacitors are mainly used for filtering differential mode interference signals and are generally called as X capacitors. The common mode inductors L1 and L2 are generally wound in the form of a common mode choke coil, and the inductance thereof ranges from 10mH to 33 mH. The noise suppression range of the pre-filter is 10-10 MHz.

As shown in fig. 4, the surge overvoltage protection module 4 includes LT4363 surge suppressors, resistors R1-R7, a diode D1, MOSFETs, capacitors C7-C10 and C12-C15; the surge overvoltage protection module 4 is connected with one end of a capacitor C7, a capacitor C8, a capacitor C15 and a resistor R4 and a D pole of an MOSFET in sequence from an input end to an output end, the S pole of the MOSFET is connected with one end of the resistor R3 and an SNS pin of an LT4363 surge suppressor, the other end of a resistor R3 is connected with an OUT pin of the LT4363 surge suppressor, a resistor R1, a capacitor C13, a capacitor C9 and one end of a capacitor C10 in sequence, the other end of the resistor R1 is connected with an FB pin of the LT4363 surge suppressor and one end of a resistor R2, and the other end of the resistor R2 is grounded; the surge overvoltage protection module 4 is sequentially connected with the other ends of the capacitor C7, the capacitor C8, the capacitor C15, the capacitor C12, the diode D1, the resistor R7, the capacitor C13, the capacitor C9 and the capacitor C10 from the input end to the negative electrode of the output end; the other end of the capacitor C12 is connected with the other end of the resistor R4, the other end of the diode D1 and the SHDN pin of the LT4363 surge suppressor, the other end of the resistor R7 is connected with the UV pin of the LT4363 surge suppressor and one end of the resistor R6, the other end of the resistor R6 is connected with the VCC pin of the LT4363 surge suppressor, the G pole of the MOSFET is connected with the GATE pin of the LT4363 surge suppressor through the resistor R5, and the TMR pin of the LT4363 surge suppressor is grounded through the capacitor C14.

The working principle of the surge overvoltage protection module 4 is as follows: the LT4356 surge suppressor has high rated input voltage, can process transient voltage of 100V and higher, and provides reverse input protection as low as-60V without damaging itself or the load. The LT4363 surge suppressor has a clamping voltage arranged inside, when the input voltage is greater than the clamping voltage, the LT4363 surge suppressor can react to enter an overvoltage protection mode to ensure that the output voltage does not exceed the clamping voltage, two resistors are connected to an external feedback pin FB of the LT4363 surge suppressor, a voltage comparator is arranged in the internal structure of the LT4363 surge suppressor, a positive phase input end of the internal voltage comparator of the LT4363 surge suppressor is connected with the feedback pin FB, a negative phase input end of the voltage comparator is connected with a reference voltage of 1.275V, and the output level of the GATE pin of the LT4363 surge suppressor is controlled by comparing the voltage of the positive phase input end of the voltage comparator with the reference voltage of the negative phase input end of the voltage comparator, so that the on-off of an external MOSFET is controlled. So as to achieve the protection purpose. When the voltage of the positive phase input end of the voltage comparator is greater than the reference voltage of the negative phase input end of the voltage comparator, the LT4363 surge suppressor GATE pin outputs low level, and the N-channel MOSFET connected with the GATE pin is immediately turned off, so that the overvoltage protection function is realized.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A sensor power supply filtering and voltage stabilizing system of an XRT intelligent ore sorting device is characterized by comprising a double-conversion online UPS, a pre-filter, an AC-DC power supply module and a surge overvoltage protection module; the double-conversion online UPS, the pre-filter, the AC-DC power module and the surge overvoltage protection module are sequentially connected.

2. The XRT intelligent ore sorting facility sensor power supply filtering and voltage stabilizing system according to claim 1, wherein the double-conversion online UPS comprises a rectifier, an inverter, a battery, and a static switch, the rectifier, the inverter, and the static switch being connected in series from an input to an output of the double-conversion online UPS, the battery being connected to the output of the rectifier; the input end of the double conversion online UPS is provided with a bypass which is connected to the static switch.

3. The XRT intelligent ore sorting equipment sensor power supply filtering and voltage stabilizing system according to claim 1, wherein the pre-filter comprises capacitors C1-C5, common mode inductors L1 and L2; a capacitor C1, a common mode inductor L1, a capacitor C2, capacitors C3 and C4 which are connected in series, a common mode inductor L2 and a capacitor C5 are connected in sequence from the input end to the output end of the pre-filter; and the capacitors C3 and C4 are grounded.

4. The XRT intelligent ore sorting facility sensor power supply filter voltage stabilizing system of claim 3 wherein the capacitors C3 and C4 have capacitance ranges of 2200pF to 0.1 μ F, the capacitors C1, C2 and C5 have capacitance ranges of 0.01 μ F to 0.47 μ F, and the common mode inductors L1 and L2 have inductance ranges of 10mH to 33 mH.

5. The XRT intelligent ore sorting equipment sensor power supply filtering voltage stabilizing system as claimed in claim 1, wherein the surge overvoltage protection module comprises LT4363 surge suppressor, resistors R1-R7, diode D1, MOSFET, capacitors C7-C10 and C12-C15; the surge overvoltage protection module is connected with one end of a capacitor C7, a capacitor C8, a capacitor C15 and a resistor R4 and a D pole of an MOSFET in sequence from an input end to an output end, an S pole of the MOSFET is connected with one end of a resistor R3 and an SNS pin of an LT4363 surge suppressor, the other end of the resistor R3 is connected with an OUT pin of the LT4363 surge suppressor, a resistor R1, a capacitor C13, a capacitor C9 and one end of a capacitor C10 in sequence, the other end of the resistor R1 is connected with an FB pin of the LT4363 surge suppressor and one end of a resistor R2, and the other end of the resistor R2 is grounded; the surge overvoltage protection module is sequentially connected with the other ends of the capacitor C7, the capacitor C8, the capacitor C15, the capacitor C12, the diode D1, the resistor R7, the capacitor C13, the capacitor C9 and the capacitor C10 from the input end to the negative electrode of the output end; the other end of the capacitor C12 is connected with the other end of the resistor R4, the other end of the diode D1 and the SHDN pin of the LT4363 surge suppressor, the other end of the resistor R7 is connected with the UV pin of the LT4363 surge suppressor and one end of the resistor R6, the other end of the resistor R6 is connected with the VCC pin of the LT4363 surge suppressor, the G pole of the MOSFET is connected with the GATE pin of the LT4363 surge suppressor through the resistor R5, and the TMR pin of the LT4363 surge suppressor is grounded through the capacitor C14.