CN109828188B - Inductance measuring device for direct current reactor of medium voltage frequency converter - Google Patents

Inductance measuring device for direct current reactor of medium voltage frequency converter Download PDF

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Publication number
CN109828188B
CN109828188B CN201811572855.6A CN201811572855A CN109828188B CN 109828188 B CN109828188 B CN 109828188B CN 201811572855 A CN201811572855 A CN 201811572855A CN 109828188 B CN109828188 B CN 109828188B
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pin
electric
module
resistor
capacitor
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CN109828188A (en
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潘春雷
杨建平
赵增佳
韩军刚
马波
李妍
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Yunnan Dahongshan Pipeline Co Ltd
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Yunnan Dahongshan Pipeline Co Ltd
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Abstract

The invention discloses a device for measuring inductance of a direct current reactor of a medium-voltage frequency converter, which comprises a current detection module, an external interface module, a single chip microcomputer module and a power supply module, wherein the current detection module, the external interface module and the power supply module are connected with the single chip microcomputer module; the device is safe and reliable in detection, avoids the potential safety hazard caused by the fact that 220V voltage is directly accessed and possible large current is measured by an ammeter; the accuracy of reactor insulation fault judgement is improved, the time of artifical judgement, tear open and examine is reduced, downtime is reduced.

Description

Inductance measuring device for direct current reactor of medium voltage frequency converter
Technical Field
The invention relates to the technical field of inductance measuring devices, in particular to a direct-current reactor inductance measuring device of a medium-voltage frequency converter.
Background
The function of the reactor is crucial in the using process of the frequency converter and is one of the components which are easy to break down, common measuring instruments do not have the accurate coil inductance measuring function, and special measuring instruments are expensive and are not necessary instruments for general electric work posts, so that the new problem of how to quickly and accurately judge the insulation breakdown degree of the reactor in the aspect of reactor fault treatment is brought to people.
Disclosure of Invention
The invention aims to provide a device for measuring inductance of a direct-current reactor of a medium-voltage frequency converter, which can quickly and accurately judge the insulation breakdown degree of the reactor.
The invention adopts the following technical scheme: the inductance measuring device comprises a current detection module, an external interface module, a single chip microcomputer module and a power supply module, wherein the current detection module, the external interface module and the power supply module are connected with the single chip microcomputer module.
Further, the power supply module comprises a power adapter power input module, a DC/12-to-DC 5V module and a DC 5V-to-DC3.3V module.
Further, the module of converting DC/12 to DC5V is connected to the output end of the power supply input module of the power adapter, and the module of converting DC/12 to DC5V selects TPS5430DDA chip, wherein the 12V output end of the power supply input module of the power adapter is connected to the VIN pin, meanwhile, the 12V output end of the power supply input module of the power adapter is connected to the GND pin, a polar capacitor C22 and a conventional capacitor C23 are arranged in parallel between the connecting lines of the VIN pin and the GND pin, and the junction between the two is set to zero potential; a pin B00T of the TPS5430DDA chip is provided with a 5V output end, a capacitor C19 and an inductor L1 are sequentially arranged on the route of the pin B00T, and the rear end of the capacitor C19 is provided with a PH pin of the TPS5430DDA chip, wherein an electric circuit is connected to the PH pin; an electric line is arranged at the front end of the inductor L1, a diode D11 is arranged on the electric line, the anode of the diode D11 is set to be zero potential, 2 electric lines are arranged in parallel at the rear end of the inductor L1, a capacitor C20 is arranged on one electric line close to the inductor L1, a polar capacitor C21 is arranged on the other electric line, and the capacitor C20 is connected with the tail end of the polar capacitor C21 and is set to be zero potential; the VSNS pin of the TPS5430DDA chip is provided with an electric line, a resistor R23 is arranged on the electric line, the tail end of a resistor R23 is set to be zero potential, an electric line is arranged at the front end of a 5V output end and the front end of a resistor R23 and is connected with the electric line, and a resistor R22 is arranged on the electric line: the PwPd pin of the TPS5430DDA chip is set to zero potential.
Further, the DC 5V-DC3.3V module is connected to a 5V output end of the DC/12-to-DC 5V module, wherein the DC 5V-to-DC3.3V module selects an RT9193 chip, a VIN pin of the RT9193 chip is connected to the 5V output end of the DC/12-to-DC 5V module, an insurance resistor F3 is further arranged on an electric line of the module, two electric lines are arranged in parallel at the rear end of the insurance resistor F3 and connected to a GND pin of the RT9193 chip, a capacitor C24 is arranged on the electric line close to the insurance resistor F3, a capacitor C25 is arranged on the other electric line, and the tail ends of the two electric lines are connected and set to a zero potential; an EN pin of the RT9193 chip is provided with an electric circuit connected to a VIN pin, and a resistor R24 is arranged between the EN pin and the VIN pin; the VOU pin of the RT9193 chip is provided with a 3.3V output electric circuit, the electric circuit is provided with 3 electric circuits in parallel, the electric circuits are respectively provided with capacitors C23, C27 and C28, and the tail ends of the three capacitors are connected and set to be zero potential; the BP pin of the RT9193 chip is provided with an electric circuit, a capacitor C29 is arranged on the electric circuit, and the tail end of a capacitor C29 is set to be zero potential.
Furthermore, the singlechip of the singlechip module is an STM32F072RBT6 singlechip.
Further, pins 46 and 49 of the STM32F072RBT6 singlechip are connected and provided with a program downloading interface; the 13, 19, 32, 64 and 48 pins of the STM32F072RBT6 singlechip are connected with each other to form a +3.3V interface pin; pins 63, 47, 31, 18 and 12 of the STM32F072RBT6 singlechip are connected with each other and are set as a zero potential GND pin; the 59 feet of the STM32F072RBT6 single chip microcomputer are connected to the SCL feet of the AT24C02D-SSHM-TEEP memory through electric lines, the 61 feet of the STM32F072RBT6 single chip microcomputer are connected to the SDA feet of the AT24C02D-SSHM-TEEP memory through electric lines, the two electric lines are connected through electric lines, resistors R20 and R21 are sequentially arranged on the electric lines, and the resistors R20 and R21 are connected to the +3.3V interface feet through electric lines; the VCC pin of the AT24C02D-SSHM-TEEP memory is connected to the +3.3V interface pin of the STM32F072RBT6 singlechip through an electric line, a branch circuit electric line is arranged on the electric line, a capacitor C18 is arranged on the electric line, and the rear end of the capacitor C18 is set to be zero potential; a 7 pin of the STM32F072RBT6 singlechip is provided with an electric circuit, the electric circuit is provided with a capacitor C17, the rear end of the capacitor C17 is set to be zero potential, the front end of the capacitor C17 is provided with a branch electric circuit connected to a +3.3V interface pin, and the branch electric circuit is provided with a resistor R17; the 5 and 6 pins of the STM32F072RBT6 singlechip are connected through an electric line, a resistor R13 is arranged on the electric line, one end of the resistor R13 close to the 5 pin is provided with a branch electric line which is connected with one end of the resistor R13 close to the 6 pin, the branch electric line is provided with capacitors C15 and C16, the branch electric line is provided with a multi-pole transistor X1, the first stage is connected with the front end of the capacitor C15, one pole is connected with the rear end of the capacitor C16, and the left and right poles are connected and then connected between the C15 and the C16; a resistor R14 is arranged on a pin 60 of the STM32F072RBT6 singlechip, and the tail end of R14 is set to be zero potential; six electric lines are arranged in parallel on a +3.3V interface pin of the STM32F072RBT6 singlechip, and the electric lines are respectively provided with capacitors C9, C10, C11, C12, C13, C14, C9, C10, C11, C12, C13 and C14, and the tail ends of the capacitors are mutually connected and set to be zero potential; an 8 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous diode D4 and a resistor R10; a 9 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D5 and a resistor R11; an electric circuit is arranged on a pin 10 of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D7; 12 pins of the STM32F072RBT6 singlechip are provided with electric lines connected to the +3.3V interface pin, and the electric lines are sequentially provided with a luminous two-section tube D8; an electric circuit is arranged on a zero potential GND pin of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and a luminous diode D6 and a resistor R12 are sequentially arranged on the electric circuit; a 24 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to a +3.3V interface pin, the electric line is sequentially provided with a resistor R16 and a resistor R15, a branch electric line connected to a zero-potential GND pin is arranged between the resistor R16 and the resistor R15, and the branch electric line is provided with a button switch S1; a 25 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to a +3.3V interface pin, the electric line is sequentially provided with a resistor R19 and a resistor R18, a branch electric line connected to a zero-potential GND pin is arranged between the resistor R19 and the resistor R18, and the branch electric line is provided with a button switch S2; a buzzer is arranged on a 56 pin of the TM32F072RBT6 singlechip, and a power supply of the buzzer adopts a DC/12-to-DC 5V module +5V output power supply.
Further, the interface module comprises a low leakage voltage emitter output module, a 4-row plug-in module and a 10-row plug-in module, wherein pins 1, 2 and 3 of the 10-row plug-in module are provided with electric lines which are connected with each other and are connected to +3.3V output ends of a DC 5V-to-DC3.3V module, pins 1, 2 and 3 of the 10-row plug-in module are provided with electric line interconnection points, a resistor R7 is arranged on the electric line between the electric line interconnection points and the pin 1, a branch electric line is arranged before the electric line interconnection points of the pins 1, 2 and 3 of the 10-row plug-in module, a capacitor C8 is arranged on the branch electric line, the rear end of the capacitor C8 is set to be zero potential, pins 4, 5, 6 and 7 of the 10-row plug-in module are respectively connected to pins 33, 34, 35 and 36 of an STM32F072RBT6 singlechip, a pin 10 pin of the 10-row plug-in module is provided with an electric line connected to a singlechip 57 of an STM32F RBT6, and a, the transistor Q3 uses an NPN transistor.
Further, the output module of the low leakage voltage transmitter selects a MAX3232CSE chip, and the output module of the voltage transmitter selects a MAX3232CSE chip: an electric circuit connection is arranged between the pin 1 and the pin 3 of the MAX3232CSE chip, and a capacitor C3 is arranged on the electric circuit; an electric circuit connection is arranged between the 4 pins and the 5 pins of the MAX3232CSE chip, and a capacitor C5 is arranged on the electric circuit; electric line connection is arranged between the 11 pins and the 12 pins of the MAX3232CSE chip: the 10 feet of the MAX3232CSE chip are connected with the 16 feet of the STM32F072RBT6 singlechip through electric lines: the pin 9 of the MAX3232CSE chip is connected with the pin 17 of the STM32F072RBT6 singlechip through an electric line; an electric circuit is arranged on the electric circuit of the pin 10 and the pin 9 of the MAX3232CSE chip and is communicated with each other, a light-emitting diode D3, a resistor R6, a resistor R5 and a light-emitting diode D2 are sequentially arranged on the electric circuit, and an electric circuit is arranged between the resistor R6 and the resistor R5 and is connected to a +3.3V output end of the DC 5V-to-DC3.3V module; setting a pin 15 of the MAX3232CSE chip to be zero potential; an electric circuit is arranged on a pin 2 of the MAX3232CSE chip, a capacitor C4 is arranged on the electric circuit, and the tail end of the capacitor C4 is set to be zero potential; a 16 pin of the MAX3232CSE chip is provided with an electric line connected to a +3.3V output end of a DC 5V-DC3.3V module, the 16 pin is provided with a branch electric line, the branch electric line is provided with a capacitor C6, and the tail end of the capacitor C6 is set to be zero potential; the 7 pins of the MAX3232CSE chip are connected to the 2 pins of the 4-row plug-in module through electric lines; the 8 pins of the MAX3232CSE chip are connected to the 3 pins of the 4-row plug-in module through electric lines, the 1 pin of the 4-row plug-in module is connected to the +5V output end of the DC/12-to-DC 5V module, and the 4 pins of the 4-row plug-in module are set to be zero potential; an electric circuit is arranged on the 6 pins of the MAX3232CSE chip, a capacitor C7 is arranged on the electric circuit, and the tail end of the capacitor C7 is connected to zero potential.
Further, the current detection module comprises a 30A current transformer module and a 30A relay module: the 30A current transformer module is provided with a 30A current transformer, pins 1 and 2 of the transformer are respectively connected to pins 2 and 3 of an 8-pin integrated couple, a 7 pin of the 8-pin integrated couple is provided with a power line connected to a +3.3V output end of a DC 5V-to-DC3.3V module, a branch circuit is arranged between the two, the branch circuit is provided with a capacitor C1, and the tail end of the capacitor C1 is set to be zero potential; be provided with 26, 27 feet that the electric circuit is connected to STM32F072RBT6 singlechip on the 6 feet of 8 feet integrated couples, be provided with resistance R2 on the electric circuit, resistance R2's end is provided with a branch electric circuit, be provided with electric capacity C2 on the branch electric circuit, electric capacity C2's end sets up to zero potential, 1 foot and the 6 feet of 8 feet integrated couples are provided with the electric circuit intercommunication, be provided with resistance R1 on the electric circuit.
Furthermore, a relay is arranged on the 30A relay module, an electric line is arranged on a pin 1 of the relay and is connected with a pin 14 of the STM32F072RBT6 single chip microcomputer, a triode Q and a resistor R3 are sequentially arranged on the electric line, one N pole of the triode Q1 is set to be zero potential, the front end of the resistor R3 is arranged from the line training stage to the zero potential pole of the triode Q1, and a resistor R4 is arranged on the circuit; electric lines are arranged on pins 1 and 2 of the relay to be communicated, a diode D1 is arranged on the electric lines, and 12V current is output from pin 2 of the relay; the 3 and 4 pins of the relay are connected with a 220V power supply, and an overcurrent protection device is arranged on a connecting circuit.
Compared with the prior art, the invention has the beneficial effects that: the device is safe and reliable in detection, avoids the potential safety hazard caused by the fact that 220V voltage is directly accessed and possible large current is measured by an ammeter; the accuracy of reactor insulation fault judgement is improved, the time of artifical judgement, tear open and examine is reduced, downtime is reduced.
Drawings
Fig. 1 shows a 30A current transformer module according to the present invention.
Fig. 2 is a 30 amp relay module of the present invention.
Fig. 3 is an external interface module of the present invention.
Fig. 4 shows a single chip microcomputer module of the present invention.
Fig. 5 shows the power supply module without the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
the inductance measuring device of the direct current reactor of the medium voltage frequency converter comprises a current detection module, an external interface module, a single chip microcomputer module and a power supply module, wherein the current detection module, the external interface module and the power supply module are connected with the single chip microcomputer module. Such a detection device can judge the reactor coil quality fast, also safe and reliable.
For the purposes of the present invention.
(1) By supplying power frequency 220V voltage to the measured reactor, the 220V power frequency voltage can be obtained everywhere in actual work, and the method is convenient and quick.
(2) The detection device is provided with an overcurrent alarm and overcurrent quick-break device for ensuring the safety of detection personnel, the detection device and a detected coil.
(3) Normally, the current passing through a well-insulated medium voltage inverter reactor coil under 220V voltage is very small because the well-insulated coil has a large inductance value, and the coil inductance value is sharply reduced along with the increase of the insulation breakdown turns of the coil, namely Z-2 pi f.L
Z-coil impedance
L-coil inductor
frequency of f-current
The coil impedance Z changes in proportion to the coil inductance L, and from ohm's law I to U/Z, it is known that I increases as the coil impedance decreases.
(4) The device is directly connected into 220 volt power frequency voltage during detection, the inductance value of the coil can be calculated after direct measurement and calculation, and the inductance value is compared with the power frequency inductance value on a factory nameplate of a factory, so that whether the coil has the insulation breakdown problem or not can be accurately judged.
(5) The actual inductance value of the coil is calculated and displayed through a single chip microcomputer program in the detection device, the result is quick and accurate, and the calculation formula is as follows: Z-U/I, L-Z/2 pi f
Wherein, the inside power supply of equipment adopts the low pressure to export after the conversion, and specific module is as follows:
the power supply module comprises a power supply input module of a power adapter, a DC/12-to-DC 5V module and a DC 5V-to-DC3.3V module, converts a 220V power supply to meet the requirements of different chips, and outputs currents with different voltages for power supply; the DC/12-to-DC 5V module is connected to the output end of the power supply input module of the power adapter, the DC/12-to-DC 5V module selects a TPS5430DDA chip, wherein the 12V output end of the power supply input module of the power adapter is connected to the VIN pin, meanwhile, the 12V output end of the power supply input module of the power adapter is connected to the GND pin, a polar capacitor C22 and a conventional capacitor C23 are arranged in parallel between the connecting lines of the VIN pin and the GND pin, and the junction of the two is set to zero potential; a pin B00T of the TPS5430DDA chip is provided with a 5V output end, a capacitor C19 and an inductor L1 are sequentially arranged on the route of the pin B00T, and the rear end of the capacitor C19 is provided with a PH pin of the TPS5430DDA chip, wherein an electric circuit is connected to the PH pin; an electric line is arranged at the front end of the inductor L1, a diode D11 is arranged on the electric line, the anode of the diode D11 is set to be zero potential, 2 electric lines are arranged in parallel at the rear end of the inductor L1, a capacitor C20 is arranged on one electric line close to the inductor L1, a polar capacitor C21 is arranged on the other electric line, and the capacitor C20 is connected with the tail end of the polar capacitor C21 and is set to be zero potential; the VSNS pin of the TPS5430DDA chip is provided with an electric line, a resistor R23 is arranged on the electric line, the tail end of a resistor R23 is set to be zero potential, an electric line is arranged at the front end of a 5V output end and the front end of a resistor R23 and is connected with the electric line, and a resistor R22 is arranged on the electric line: the PwPd pin of the TPS5430DDA chip is set to zero potential.
The DC 5V-to-DC3.3V module is connected to a 5V output end of a DC/12-to-DC 5V module, wherein the DC 5V-to-DC3.3V module selects an RT9193 chip, a VIN pin of the RT9193 chip is connected to a 5V output end of the DC/12-to-DC 5V module, a safety resistor F3 is further arranged on an electric wire, two electric wires are arranged in parallel at the rear end of the safety resistor F3 and connected to a GND pin of the RT9193 chip, a capacitor C24 is arranged on the electric wire close to the safety resistor F3, a capacitor C25 is arranged on the other electric wire, and the tail ends of the two electric wires are connected and set to; an EN pin of the RT9193 chip is provided with an electric circuit connected to a VIN pin, and a resistor R24 is arranged between the EN pin and the VIN pin; the VOU pin of the RT9193 chip is provided with a 3.3V output electric circuit, the electric circuit is provided with 3 electric circuits in parallel, the electric circuits are respectively provided with capacitors C23, C27 and C28, and the tail ends of the three capacitors are connected and set to be zero potential; the BP pin of the RT9193 chip is provided with an electric circuit, a capacitor C29 is arranged on the electric circuit, and the tail end of a capacitor C29 is set to be zero potential.
In the selection of the single chip microcomputer, the single chip microcomputer of the single chip microcomputer module selects an STM32F072RBT6 single chip microcomputer, wherein pins 46 and 49 of the STM32F072RBT6 single chip microcomputer are connected and provided with a program downloading interface for loading a program; the 13, 19, 32, 64 and 48 pins of the STM32F072RBT6 singlechip are connected with each other to form a +3.3V interface pin; pins 63, 47, 31, 18 and 12 of the STM32F072RBT6 singlechip are connected with each other and are set as a zero potential GND pin; the 59 feet of the STM32F072RBT6 single chip microcomputer are connected to the SCL feet of the AT24C02D-SSHM-TEEP memory through electric lines, the 61 feet of the STM32F072RBT6 single chip microcomputer are connected to the SDA feet of the AT24C02D-SSHM-TEEP memory through electric lines, the two electric lines are connected through electric lines, resistors R20 and R21 are sequentially arranged on the electric lines, and the resistors R20 and R21 are connected to the +3.3V interface feet through electric lines; the VCC pin of the AT24C02D-SSHM-TEEP memory is connected to the +3.3V interface pin of the STM32F072RBT6 singlechip through an electric line, a branch electric line is arranged on the electric line, a capacitor C18 is arranged on the electric line, and the rear end of the capacitor C18 is set to be zero potential; a 7 pin of the STM32F072RBT6 singlechip is provided with an electric circuit, the electric circuit is provided with a capacitor C17, the rear end of the capacitor C17 is set to be zero potential, the front end of the capacitor C17 is provided with a branch electric circuit connected to a +3.3V interface pin, and the branch electric circuit is provided with a resistor R17; the 5 and 6 pins of the STM32F072RBT6 singlechip are connected through an electric line, a resistor R13 is arranged on the electric line, one end of the resistor R13 close to the 5 pin is provided with a branch electric line which is connected with one end of the resistor R13 close to the 6 pin, the branch electric line is provided with capacitors C15 and C16, the branch electric line is provided with a multi-pole transistor X1, the first stage is connected with the front end of the capacitor C15, one pole is connected with the rear end of the capacitor C16, and the left and right poles are connected and then connected between the C15 and the C16; a resistor R14 is arranged on a pin 60 of the STM32F072RBT6 singlechip, and the tail end of R14 is set to be zero potential; six electric lines are arranged in parallel on a +3.3V interface pin of the STM32F072RBT6 singlechip, and the electric lines are respectively provided with capacitors C9, C10, C11, C12, C13, C14, C9, C10, C11, C12, C13 and C14, and the tail ends of the capacitors are mutually connected and set to be zero potential; an 8 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous diode D4 and a resistor R10; a 9 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D5 and a resistor R11; an electric circuit is arranged on a pin 10 of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D7; 12 pins of the STM32F072RBT6 singlechip are provided with electric lines connected to the +3.3V interface pin, and the electric lines are sequentially provided with a luminous two-section tube D8; an electric circuit is arranged on a zero potential GND pin of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and a luminous diode D6 and a resistor R12 are sequentially arranged on the electric circuit; a 24 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to a +3.3V interface pin, the electric line is sequentially provided with a resistor R16 and a resistor R15, a branch electric line connected to a zero-potential GND pin is arranged between the resistor R16 and the resistor R15, and the branch electric line is provided with a button switch S1; a 25 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to a +3.3V interface pin, the electric line is sequentially provided with a resistor R19 and a resistor R18, a branch electric line connected to a zero-potential GND pin is arranged between the resistor R19 and the resistor R18, and the branch electric line is provided with a button switch S2; a buzzer is arranged on a 56 pin of the TM32F072RBT6 singlechip, and a power supply of the buzzer adopts a DC/12-to-DC 5V module +5V output power supply.
The single chip microcomputer is connected and provided with an external interface, the interface module comprises a low leakage voltage emitter output module, a 4-row plug-in module and a 10-row plug-in module, pins 1, 2 and 3 of the 10-row plug-in module are provided with electric line interconnection and are connected to +3.3V output ends of a DC 5V-DC3.3V conversion module, pins 1, 2 and 3 of the 10-row plug-in module are provided with an electric line interconnection point and an electric line between the electric line interconnection point and the pin 1, a branch electric line is arranged before the electric line interconnection point of the pins 1, 2 and 3 of the 10-row plug-in module, a capacitor C8 is arranged on the branch electric line, the rear end of the capacitor C8 is set to be zero potential, pins 4, 5, 6 and 7 of the 10-row plug-in module are respectively connected to pins 33, 34, 35 and 36 of an STM32F072RBT6 single chip microcomputer, a triode 368657 of the 10-row plug-in which the electric line is connected to an STM32F RBT6 single chip microcomputer, and an electric line 36Q 8678 are sequentially, the transistor Q3 uses an NPN transistor.
The output module of the low-leakage voltage transmitter selects a MAX3232CSE chip: an electric circuit connection is arranged between the pin 1 and the pin 3 of the MAX3232CSE chip, and a capacitor C3 is arranged on the electric circuit; an electric circuit connection is arranged between the 4 pins and the 5 pins of the MAX3232CSE chip, and a capacitor C5 is arranged on the electric circuit; electric line connection is arranged between the 11 pins and the 12 pins of the MAX3232CSE chip: the 10 feet of the MAX3232CSE chip are connected with the 16 feet of the STM32F072RBT6 singlechip through electric lines: the pin 9 of the MAX3232CSE chip is connected with the pin 17 of the STM32F072RBT6 singlechip through an electric line; an electric circuit is arranged on the electric circuit of the pin 10 and the pin 9 of the MAX3232CSE chip and is communicated with each other, a light-emitting diode D3, a resistor R6, a resistor R5 and a light-emitting diode D2 are sequentially arranged on the electric circuit, and an electric circuit is arranged between the resistor R6 and the resistor R5 and is connected to a +3.3V output end of the DC 5V-to-DC3.3V module; setting a pin 15 of the MAX3232CSE chip to be zero potential; an electric circuit is arranged on a pin 2 of the MAX3232CSE chip, a capacitor C4 is arranged on the electric circuit, and the tail end of the capacitor C4 is set to be zero potential; a 16 pin of the MAX3232CSE chip is provided with an electric line connected to a +3.3V output end of a DC 5V-DC3.3V module, the 16 pin is provided with a branch electric line, the branch electric line is provided with a capacitor C6, and the tail end of the capacitor C6 is set to be zero potential; the 7 pins of the MAX3232CSE chip are connected to the 2 pins of the 4-row plug-in module through electric lines; the 8 pins of the MAX3232CSE chip are connected to the 3 pins of the 4-row plug-in module through electric lines, the 1 pin of the 4-row plug-in module is connected to the +5V output end of the DC/12-to-DC 5V module, and the 4 pins of the 4-row plug-in module are set to be zero potential; an electric circuit is arranged on the 6 pins of the MAX3232CSE chip, a capacitor C7 is arranged on the electric circuit, and the tail end of the capacitor C7 is connected to zero potential.
The current detection module comprises a 30A current transformer module and a 30A relay module: the 30A current transformer module is provided with a 30A current transformer, pins 1 and 2 of the transformer are respectively connected to pins 2 and 3 of an 8-pin integrated couple, a 7 pin of the 8-pin integrated couple is provided with a power line connected to a +3.3V output end of a DC 5V-to-DC3.3V module, a branch circuit is arranged between the two, the branch circuit is provided with a capacitor C1, and the tail end of the capacitor C1 is set to be zero potential; be provided with 26, 27 feet that the electric circuit is connected to STM32F072RBT6 singlechip on the 6 feet of 8 feet integrated couples, be provided with resistance R2 on the electric circuit, resistance R2's end is provided with a branch electric circuit, be provided with electric capacity C2 on the branch electric circuit, electric capacity C2's end sets up to zero potential, 1 foot and the 6 feet of 8 feet integrated couples are provided with the electric circuit intercommunication, be provided with resistance R1 on the electric circuit.
The 30A relay module is provided with a relay, a 1 pin of the relay is provided with an electric line connected with a 14 pin of an STM32F072RBT6 singlechip, a triode Q and a resistor R3 are sequentially arranged on the electric line, one N pole of the triode Q1 is set to be zero potential, the front end of the resistor R3 is arranged from the electric line training level to the zero potential pole of the triode Q1, and the circuit is provided with a resistor R4; electric lines are arranged on pins 1 and 2 of the relay to be communicated, a diode D1 is arranged on the electric lines, and 12V current is output from pin 2 of the relay; the 3 and 4 pins of the relay are connected with a 220V power supply, and an overcurrent protection device is arranged on a connecting circuit.
When the device is used, equipment is turned on, the equipment is automatically initialized, then the detection is started, the power frequency 220V voltage is turned on, the current is detected, whether the current is less than 20 amperes is judged, if not, the power frequency 220V voltage is turned off, the result is displayed, if yes, the inductance value calculation is carried out, then the power frequency 220V voltage is turned off, the result is displayed, and the detection step is continuously carried out.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (8)

1. The utility model provides a medium voltage inverter direct current reactor inductance measuring device which characterized in that: the intelligent control system comprises a current detection module, an external interface module, a single chip microcomputer module and a power supply module, wherein the current detection module, the external interface module and the power supply module are connected with the single chip microcomputer module, the single chip microcomputer of the single chip microcomputer module is an STM32F072RBT6 single chip microcomputer, and pins 46 and 49 of the STM32F072RBT6 single chip microcomputer are connected with a program downloading interface; the 13, 19, 32, 64 and 48 pins of the STM32F072RBT6 singlechip are connected with each other to form a +3.3V interface pin; pins 63, 47, 31, 18 and 12 of the STM32F072RBT6 singlechip are connected with each other and are set as a zero potential GND pin; the 59 feet of the STM32F072RBT6 single chip microcomputer are connected to the SCL feet of the AT24C02D-SSHM-TEEP memory through electric lines, the 61 feet of the STM32F072RBT6 single chip microcomputer are connected to the SDA feet of the AT24C02D-SSHM-TEEP memory through electric lines, the two electric lines are connected through electric lines, resistors R20 and R21 are sequentially arranged on the electric lines, and the resistors R20 and R21 are connected to the +3.3V interface feet through electric lines; the VCC pin of the AT24C02D-SSHM-TEEP memory is connected to the +3.3V interface pin of the STM32F072RBT6 singlechip through an electric line, a branch electric line is arranged on the electric line, a capacitor C18 is arranged on the electric line, and the rear end of the capacitor C18 is set to be zero potential; a 7 pin of the STM32F072RBT6 singlechip is provided with an electric circuit, the electric circuit is provided with a capacitor C17, the rear end of the capacitor C17 is set to be zero potential, the front end of the capacitor C17 is provided with a branch electric circuit connected to a +3.3V interface pin, and the branch electric circuit is provided with a resistor R17; the 5 and 6 pins of the STM32F072RBT6 singlechip are connected through an electric line, a resistor R13 is arranged on the electric line, one end of the resistor R13 close to the 5 pin is provided with a branch electric line which is connected with one end of the resistor R13 close to the 6 pin, the branch electric line is provided with capacitors C15 and C16, the branch electric line is provided with a multi-pole transistor X1, the first stage is connected with the front end of the capacitor C15, one pole is connected with the rear end of the capacitor C16, and the left and right poles are connected and then connected between the C15 and the C16; a resistor R14 is arranged on a pin 60 of the STM32F072RBT6 singlechip, and the tail end of R14 is set to be zero potential; six electric lines are arranged in parallel on a +3.3V interface pin of the STM32F072RBT6 singlechip, and the electric lines are respectively provided with capacitors C9, C10, C11, C12, C13, C14, C9, C10, C11, C12, C13 and C14, and the tail ends of the capacitors are mutually connected and set to be zero potential; an 8 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous diode D4 and a resistor R10; a 9 pin of the STM32F072RBT6 singlechip is provided with an electric circuit connected to the +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D5 and a resistor R11; an electric circuit is arranged on a pin 10 of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and the electric circuit is sequentially provided with a luminous two-section tube D7; 12 pins of the STM32F072RBT6 singlechip are provided with electric lines connected to the +3.3V interface pin, and the electric lines are sequentially provided with a luminous two-section tube D8; an electric circuit is arranged on a zero potential GND pin of the STM32F072RBT6 singlechip and is connected to a +3.3V interface pin, and a luminous diode D6 and a resistor R12 are sequentially arranged on the electric circuit; a 24 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to a +3.3V interface pin, the electric line is sequentially provided with a resistor R16 and a resistor R15, a branch electric line connected to a zero-potential GND pin is arranged between the resistor R16 and the resistor R15, the branch electric line is provided with a button switch S1, a 25 pin of the STM32F072RBT6 singlechip is provided with an electric line connected to the +3.3V interface pin, the electric line is sequentially provided with a resistor R19 and a resistor R18, a branch electric line connected to the zero-potential GND pin is arranged between the resistor R19 and the resistor R18, and the branch electric line is provided with a button switch S2; a buzzer is arranged on a 56 pin of the TM32F072RBT6 singlechip, and a power supply of the buzzer adopts a DC/12-to-DC 5V module +5V output power supply.
2. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 1, characterized in that: the power supply module comprises a power adapter power input module, a DC/12-to-DC 5V module and a DC 5V-to-DC3.3V module.
3. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 2, characterized in that: the DC/12-to-DC 5V module is connected to the output end of the power supply input module of the power adapter, the DC/12-to-DC 5V module selects a TPS5430DDA chip, wherein the 12V output end of the power supply input module of the power adapter is connected to a VIN pin, meanwhile, the 12V output end of the power supply input module of the power adapter is connected to a GND pin, a polar capacitor C22 and a conventional capacitor C23 are arranged in parallel between the connecting lines of the VIN pin and the GND pin, and the junction of the two is set to zero potential; a pin B00T of the TPS5430DDA chip is provided with a 5V output end, a capacitor C19 and an inductor L1 are sequentially arranged on the route of the pin B00T, and the rear end of the capacitor C19 is provided with a PH pin of the TPS5430DDA chip, wherein an electric circuit is connected to the PH pin; an electric line is arranged at the front end of the inductor L1, a diode D11 is arranged on the electric line, the anode of the diode D11 is set to be zero potential, 2 electric lines are arranged in parallel at the rear end of the inductor L1, a capacitor C20 is arranged on one electric line close to the inductor L1, a polar capacitor C21 is arranged on the other electric line, and the capacitor C20 is connected with the tail end of the polar capacitor C21 and is set to be zero potential; the VSNS pin of the TPS5430DDA chip is provided with an electric line, a resistor R23 is arranged on the electric line, the tail end of a resistor R23 is set to be zero potential, an electric line is arranged at the front end of a 5V output end and the front end of a resistor R23 and is connected with the electric line, and a resistor R22 is arranged on the electric line: the PwPd pin of the TPS5430DDA chip is set to zero potential.
4. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 2, characterized in that: the DC 5V-to-DC3.3V module is connected to a 5V output end of a DC/12-to-DC 5V module, wherein the DC 5V-to-DC3.3V module selects an RT9193 chip, a VIN pin of the RT9193 chip is connected to a 5V output end of the DC/12-to-DC 5V module, a safety resistor F3 is further arranged on an electric wire, two electric wires are arranged in parallel at the rear end of the safety resistor F3 and connected to a GND pin of the RT9193 chip, a capacitor C24 is arranged on the electric wire close to the safety resistor F3, a capacitor C25 is arranged on the other electric wire, and the tail ends of the two electric wires are connected and set to be; an EN pin of the RT9193 chip is provided with an electric circuit connected to a VIN pin, and a resistor R24 is arranged between the EN pin and the VIN pin; the VOU pin of the RT9193 chip is provided with a 3.3V output electric circuit, the electric circuit is provided with 3 electric circuits in parallel, the electric circuits are respectively provided with capacitors C23, C27 and C28, and the tail ends of the three capacitors are connected and set to be zero potential; the BP pin of the RT9193 chip is provided with an electric circuit, a capacitor C29 is arranged on the electric circuit, and the tail end of a capacitor C29 is set to be zero potential.
5. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 1, characterized in that: the external interface module comprises a low leakage voltage transmitter output module, a 4-row plug-in module and a 10-row plug-in module, wherein pins 1, 2 and 3 of the 10-row plug-in module are provided with electric lines which are mutually connected and are connected to +3.3V output ends of a DC 5V-DC3.3V module, a resistor R7 is arranged on the electric line between the electric line mutually connected point and the pin 1 arranged on the pin 1, 2 and 3 of the 10-row plug-in module, a branch electric line is arranged before the electric line mutually connected point arranged on the pin 1, 2 and 3 of the 10-row plug-in module, a capacitor C8 is arranged on the branch electric line, the rear end of the capacitor C8 is set to be zero potential, pins 4, 5, 6 and 7 of the 10-row plug-in module are respectively connected to pins 33, 34, 35 and 36 of an STM32F072RBT6 singlechip, a pin 10 of the 10-row plug-in module is provided with a triode Q3 and a resistor R9 which are sequentially arranged on the electric line, the transistor Q3 uses an NPN transistor.
6. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 5, characterized in that: the output module of the low-leakage voltage transmitter selects a MAX3232CSE chip: an electric circuit connection is arranged between the pin 1 and the pin 3 of the MAX3232CSE chip, and a capacitor C3 is arranged on the electric circuit; an electric circuit connection is arranged between the 4 pins and the 5 pins of the MAX3232CSE chip, and a capacitor C5 is arranged on the electric circuit; electric line connection is arranged between the 11 pins and the 12 pins of the MAX3232CSE chip: the 10 feet of the MAX3232CSE chip are connected with the 16 feet of the STM32F072RBT6 singlechip through electric lines: the pin 9 of the MAX3232CSE chip is connected with the pin 17 of the STM32F072RBT6 singlechip through an electric line; an electric circuit is arranged on the electric circuit of the pin 10 and the pin 9 of the MAX3232CSE chip and is communicated with each other, a light-emitting diode D3, a resistor R6, a resistor R5 and a light-emitting diode D2 are sequentially arranged on the electric circuit, and an electric circuit is arranged between the resistor R6 and the resistor R5 and is connected to a +3.3V output end of the DC 5V-to-DC3.3V module; setting a pin 15 of the MAX3232CSE chip to be zero potential; an electric circuit is arranged on a pin 2 of the MAX3232CSE chip, a capacitor C4 is arranged on the electric circuit, and the tail end of the capacitor C4 is set to be zero potential; a 16 pin of the MAX3232CSE chip is provided with an electric line connected to a +3.3V output end of a DC 5V-DC3.3V module, the 16 pin is provided with a branch electric line, the branch electric line is provided with a capacitor C6, and the tail end of the capacitor C6 is set to be zero potential; the 7 pins of the MAX3232CSE chip are connected to the 2 pins of the 4-row plug-in module through electric lines; the 8 pins of the MAX3232CSE chip are connected to the 3 pins of the 4-row plug-in module through electric lines, the 1 pin of the 4-row plug-in module is connected to the +5V output end of the DC/12-to-DC 5V module, and the 4 pins of the 4-row plug-in module are set to be zero potential; an electric circuit is arranged on the 6 pins of the MAX3232CSE chip, a capacitor C7 is arranged on the electric circuit, and the tail end of the capacitor C7 is connected to zero potential.
7. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 1, characterized in that: the current detection module comprises a 30A current transformer module and a 30A relay module: the 30A current transformer module is provided with a 30A current transformer, pins 1 and 2 of the transformer are respectively connected to pins 2 and 3 of an 8-pin integrated couple, a 7 pin of the 8-pin integrated couple is provided with a power line connected to a +3.3V output end of a DC 5V-to-DC3.3V module, a branch circuit is arranged between the two, the branch circuit is provided with a capacitor C1, and the tail end of the capacitor C1 is set to be zero potential; be provided with 26, 27 feet that the electric circuit is connected to STM32F072RBT6 singlechip on the 6 feet of 8 feet integrated couples, be provided with resistance R2 on the electric circuit, resistance R2's end is provided with a branch electric circuit, be provided with electric capacity C2 on the branch electric circuit, electric capacity C2's end sets up to zero potential, 1 foot and the 6 feet of 8 feet integrated couples are provided with the electric circuit intercommunication, be provided with resistance R1 on the electric circuit.
8. The inductance measuring device of the DC reactor of the medium-voltage frequency converter according to claim 7, is characterized in that: the 30A relay module is provided with a relay, a 1 pin of the relay is provided with an electric line connected with a 14 pin of an STM32F072RBT6 singlechip, a triode Q and a resistor R3 are sequentially arranged on the electric line, one N pole of the triode Q1 is set to be zero potential, the front end of the resistor R3 is arranged from the electric line training level to the zero potential pole of the triode Q1, and the circuit is provided with a resistor R4; electric lines are arranged on pins 1 and 2 of the relay to be communicated, a diode D1 is arranged on the electric lines, and 12V current is output from pin 2 of the relay; the 3 and 4 pins of the relay are connected with a 220V power supply, and an overcurrent protection device is arranged on a connecting circuit.
CN201811572855.6A 2018-12-21 2018-12-21 Inductance measuring device for direct current reactor of medium voltage frequency converter Active CN109828188B (en)

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