CN106841862B - Pacify river frequency converter UV method for diagnosing faults and its automatic detection device - Google Patents
Pacify river frequency converter UV method for diagnosing faults and its automatic detection device Download PDFInfo
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- CN106841862B CN106841862B CN201710046022.5A CN201710046022A CN106841862B CN 106841862 B CN106841862 B CN 106841862B CN 201710046022 A CN201710046022 A CN 201710046022A CN 106841862 B CN106841862 B CN 106841862B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The present invention is a kind of peace river frequency converter UV method for diagnosing faults and its automatic detection device, peace river frequency converter is mainly made of master control borad, communication board and interface, power module, operation panel, several groups power cell, the power cell is mainly made of: IGBT, trigger board and precharge switching contactor, it is characterised in that the specific method is as follows: 1, extracting the voltage feedback signal of precharge switching contactor actuation situation；2, any one group of precharge switching contactor in several groups power cell is non-attracting state, then it is non-attracting state that corresponding detection relay coil is synchronous, and the counter loop conducting being correspondingly arranged is counted, and confirms that this group of power cell has 1 failure；It is on the contrary then without counting；3, maintenance personal reads counter values, and by the numerical value change of counter, quickly confirmation is which corresponding group power cell failure, repairs work.
Description
Technical field
The present invention relates to a kind of frequency converter failure detection methods, especially disclose a kind of applied to peace river 676H5 frequency converter
Diagnostic method when UV failure is reported, is a kind of method for detecting and showing automatically fault point for the frequency converter of hoisting machinery, just
Faulty component is quickly found in maintenance personal and is overhauled.
Background technique
Pacify river 676H5 frequency converter mainly by master control borad, communication board and interface, operation panel, power module, power cell structure
At according to load needs, providing sufficiently large power output using several groups power cell, every group of power cell output is
200KVA.The power cell is mainly by IGBT, resistance-capacitance absorption, afterflow protection, current detecting, cooling blower, quick fuse
Protection, trigger board (driving plate), start-up resistor, precharge switching contactor, capacitor and input/output interface are constituted.Its main work
Make process are as follows: after connecting main circuit power, the DC bus of An Chuan 676H5 frequency converter receives VS -656DC5(rectification unit)
The DC power supply sent starts to start simultaneously at self-test to the capacitor charging on power cell, and capacitor charging is completed, master control borad inspection
After measuring the normal data, by the 17CN connector interface in the trigger board (driving plate) of power cell, switching signal is passed
It is sent to precharge switching contactor, then by the contact of precharge switching contactor, passes through the trigger board (driving plate) of power cell
On 17CN connector interface, by the attracting state of the precharge switching contactor, feedback arrives master control borad in the form of voltage, completes
The collection process of data needed for this link self-test.
The problems of the above-mentioned prior art: if capacitor charging is completed, switching signal is transmitted to preliminary filling cutting by master control borad
After changing-over tentaculum, it is not connected to voltage feedback signal (the i.e. precharge switching contactor that precharge switching contactor feedback comes such as
It is not attracted), master control borad can show fault code on operation panel.But the fault code shown on operation panel is only
For " UV " or UV3 " printed words, meaning is respectively as follows: instantaneous power loss, precharge switching contactor contact is opened.By frequency converter
It constitutes and the workflow of power cell is it is found that the several groups power cell controlled by one piece of mainboard of frequency converter, occurs
Failure is likely to be present in any one group in several groups power cell.Obviously, the fault code only shown by operation panel,
Can not accurately judge it is which specific group failure in several groups power cell, need manually through observation master control borad
The combinations of upper five indicator lights judges corresponding power cell error situation, and after there is UV fault-signal, maintenance personal is needed
Check input power whether phase shortage, if input power is normal, then check commutating circuit it is whether faulty, if all do not have
Problem, it is necessary to situations such as whether problematic, dropping resistor is breaking on DC detection circuit seen.Such diagnostic mode is not
The personnel that only need repairing are very familiar to related circuit, there is technology really up to the mark, and heavy workload, even the dimension being skilled in technique
The personnel of repairing are also required to judge failure by the extensive work time, have greatly delayed the normal operation of equipment, especially
In the container terminal using peace river 676H5 frequency converter work, caused economic loss is huge.
Summary of the invention
Present invention aim to address the defect of the prior art, design when a kind of peace river 676H5 frequency converter reports UV failure
Diagnostic method can effectively detect that in the peace river 676H5 frequency convertor system using multiple groups power cell, which organizes power list
Member has occurred precharge switching contactor and is not attracted or instantaneously loses the failure put.
The present invention is implemented as follows: a kind of peace river frequency converter UV method for diagnosing faults, is applied to peace river 676H5 type frequency conversion
Device, the peace river frequency converter is mainly by master control borad, communication board and interface, power module, operation panel and several groups power list
Member is constituted, and the power cell is mainly by IGBT, resistance-capacitance absorption, afterflow protection, current detecting, cooling blower, quick fuse
Protection, trigger board, start-up resistor, precharge switching contactor, capacitor and input/output interface are constituted, it is characterised in that described
Steps are as follows for method for diagnosing faults:
(1) precharge switching contactor is extracted by the connector interface being arranged in the trigger board in the power cell to inhale
Close the voltage feedback signal of situation；
(2) several groups power cell is respectively equipped with corresponding detection relay, and is equipped with and the detection relay accordingly
Device contact connection counter loop, it is described detection relay contact be divided into detection relay normally opened contact and detection after
The normally-closed contact of electric appliance, when precharge switching contactor all in the several groups power cell is all attracting state, then
The coil of detection relay corresponding with precharge switching contactor is also all attracting state, corresponding to detect the normally closed of relay
Contact all disconnects and is in open-circuit condition, and the normally opened contact of corresponding detection relay is all closed and is in channel status, makes
It obtains the normally opened contact of concatenated detection relay and the normally-closed contact of detection relay in the same branch of corresponding counter and forms one
A disconnected, state closed, counter due to the circuit in branch disconnects without counting；
(3) the precharge switching contactor for having any one group in several groups power cell is non-attracting state, then corresponds to this
The coil of the detection relay of group precharge switching contactor is also non-attracting state, and the detection of this group is corresponded in counter loop
The precharge that the normally-closed contact of relay keeps original state and is in channel status, and is normally attracted in several groups power cell switches
The normally opened contact of detection relay in counter loop corresponding to contactor is closed and is in channel status, so that mutually accrued
The normally opened contact of concatenated detection relay and the normally-closed contact of detection relay are formed fully closed logical in the number same branch of device
And be connected, then counter loop corresponding to this group of power cell is connected, and is counted, and confirms that this group of power cell has 1 event
Barrier；
(4) in generation " UV " failure, the voltage feedback signal that switching contactor is pre-charged when malfunction is passed through into institute
It states the 17CN connector interface being arranged in the trigger board in power cell and feeds back to the master control borad, by master control borad by failure generation
Code " UV " or UV3 " is shown on operation panel；
(5) maintenance personal reads counter values, is which group power list to confirm according to the numerical value change of corresponding counter
Member breaks down, and carries out corresponding maintenance work.
It is by trigger board that precharge switching contactor in the power cell, which is attracted the voltage feedback signal of situation,
What the interface of the connector of setting extracted, the connector, which is 17CN connector, to be inserted by four needle jack plugs and four needles
Head plug-in unit composition external member, four needles be a needle, b needle, c needle, d needle, and respectively in corresponding circuit be used for switching signal
The port a, the port b connected with the port c for voltage feedback signal, d port circuit, wherein the port a and the port b is
The switching signal that mainboard sends DC24V is received, the port a connects positive pole, and the port b connects power cathode, together
When, the port a is connected to the port the c direct circuit, and the voltage feedback signal is by the port b and d
The voltage feedback signal that the current potential that port is formed extracts, the port d connect positive pole, and the port b connects power cathode.
Four pin plug plug-in units of the 17CN connector are fixed in the trigger board, and the 17CN connector is used for
The voltage feedback signal of precharge switching contactor contact is provided for master control borad and master control borad is mentioned to precharge switching contactor
For switching signal；Every group of power cell need to correspond to the four needle connectors to match with the 17CN connector added,
The external member being made of four needle jack connectors and the four pin plug connectors with a needle, b needle, c needle, d needle, from four needles
1 conducting wire and band a needle, b needle, c are respectively drawn in a needle port, b needle port, c needle port and the d needle port of jack connector
Needle, d needle the connection of four pin plug connectors while, then respectively draw 1 conducting wire from the d needle port, b needle port, and point
It is not connected to No. 1 port, No. 2 ports at the detection both ends relay coil K1, is connect to obtain with the 17CN being arranged in trigger board
The separated time connector for the automatic detection device that the interface of plug-in unit matches, by four needle jack plugs of the 17CN connector from institute
It is pulled up in the trigger board stated, is inserted into four pin plug connectors of the separated time connector, and by four needles of the separated time connector
Jack connector is docked with four pin plug plug-in units of the 17CN connector, is realized under the premise of meeting original function, by institute
The purpose that voltage feedback signal extracts is needed, the several groups power cell used in the frequency converter need to be correspondingly arranged mating
The separated time connector of group number.
A kind of used river frequency converter UV fault diagnosis of pacifying of above-mentioned peace river frequency converter UV method for diagnosing faults detects automatically
Device, it is characterised in that: the automatic detection device include information state recorder, logic automatically control with decision circuitry,
Overcurrent fast-tripping protection circuit, work light, the shell with antirust and insulation function, separated time connector and with it is each on frequency converter
The interface for extracting voltage feedback signal passes through extraction voltage feedback signal each on the separated time connector and frequency converter
Interface connection is read in each power cell trigger board by the voltage of the precharge switching contactor contact feedback inside frequency converter
The data-signal counted is sent to described by feedback signal using the logic automatic control and decision circuitry
Information state recorder shown automatically as a result, the work light is used to indicate that the automatic detection device to be
No to be in normal operating conditions, the overcurrent fast-tripping protection circuit is excessively electric inside the automatic detection device for preventing
Stream causes the peace river frequency converter internal short circuit fault, and the information state recorder includes counter loop, for remembering
Corresponding power cell fault number is recorded, the separated time connector of the automatic detection device is connect with the 17CN being arranged in trigger board
The four needle connectors that plug-in unit matches, from a needle port at four this end of needle jack connector of the separated time connector, b needle port,
While 4 conducting wires are drawn in c needle port and d needle port, 2 conducting wires, four needles of formation are also drawn again from b needle port, d needle port
Jack connector is equipped with 6 conducting wires, and 2 conducting wires that b needle port, d needle port are drawn are connected to detection relay coil
Both ends, the several groups power cell used in the frequency converter need to be correspondingly arranged the separated time connector of mating group of number and corresponding
The detection relay of quantity.
Four pin plug plug-in units of the 17CN connector are fixed in the trigger board, first will be described when being detected
Four needle jack plugs of 17CN connector pull up, then four pin plugs of itself and the separated time connector of the automatic detection device are connect
Plug-in unit docking, then patches the 17CN that four needle jack connectors of the separated time connector are inserted and fixed in the trigger board
On four pin plug plug-in units of part.
Instantaneous power loss is caused by not being attracted as precharge switching contactor, two to be shown on operation panel
A fault code, i.e. " UV " and " UV3 " are not attracted or instantaneously lose wherein " UV " refers to that precharge switching contactor contact is opened
It puts, " UV3 " refers to that instantaneous power is lost, and it is exactly to be pre-charged switching contactor touching that instantaneous power, which loses one such state,
Instantaneous open of point is not attracted, so, UV failure of the present invention includes showing on the operation panel for pacify river 676H5 frequency converter
Two kinds of fault codes of UV and UV3.
The beneficial effects of the present invention are: the present invention is a kind of diagnosis suitable for pacifying when river 676H5 frequency converter reports UV failure
Method, can be in mainboard report " UV " failure, by fault point locating for display fault code from multiple groups power cell, by certainly
Dynamic to detect that failure occurs in accurate, rapid and particularly shown which group haveing in power cell, compensating for the prior art cannot
Automatically the defect detected.Meanwhile the present invention use it is easy to operate, be easy to replicate, can easily be produced according to the method
Corresponding automatic detection device, according to the current market price, cost of manufacture be can control at 500 yuan of RMB or so, and
Since automatic detection device obtained has memory function according to the method for the present invention, information will not be lost because of power-off, greatly
The work of maintenance personal is facilitated, and ensure that the accuracy of testing result.The present invention has a matter in the efficiency of maintenance
Leap, for a long time, this failure occurs for similar frequency converter, since maintenance time is long, in addition to maintenance technician, equipment management
And proposing that test is outer using the harbour entirety operation management of peace river frequency converter, the integrity service reputation to harbour is also a pole
Big challenge has unlocked the chain of many years in relevant device maintenance of bottling up, has also eliminated one piece for the development of harbour and trip
Stone.
Detailed description of the invention
Fig. 1 is the automatic detection device detection of the embodiment of the present invention and the work original of logic judgment automatic counting control circuit
Reason figure.
Fig. 2 is that the voltage feedback signal of automatic detection device of the embodiment of the present invention extracts circuit connecting relation schematic diagram.
Fig. 3 is four of the 17CN connector in the trigger board for pacify in the embodiment of the present invention river 676H5 transducer power unit
The electrical block diagram of pin plug plug-in unit.
Specific embodiment
A kind of peace river frequency converter UV method for diagnosing faults of the present invention is applied to peace river 676H5 type frequency converter, the peace river
Frequency converter is mainly made of master control borad, communication board and interface, power module, operation panel and several groups power cell, described
Power cell mainly by: IGBT, resistance-capacitance absorption, afterflow protection, current detecting, cooling blower, quick fuse protection, trigger board,
Start-up resistor, precharge switching contactor, capacitor and input/output interface are constituted, and steps are as follows for the method for diagnosing faults:
(1) precharge switching contactor is extracted by the connector interface being arranged in the trigger board in the power cell to inhale
Close the voltage feedback signal of situation；
(2) several groups power cell is respectively equipped with corresponding detection relay, and is equipped with and the detection relay accordingly
Device contact connection counter loop, it is described detection relay contact be divided into detection relay normally opened contact and detection after
The normally-closed contact of electric appliance, when precharge switching contactor all in the several groups power cell is all attracting state, then
The coil of detection relay corresponding with precharge switching contactor is also all attracting state, corresponding to detect the normally closed of relay
Contact all disconnects and is in open-circuit condition, and the normally opened contact of corresponding detection relay is all closed and is in channel status, makes
It obtains the normally opened contact of concatenated detection relay and the normally-closed contact of detection relay in the same branch of corresponding counter and forms one
A disconnected, state closed, counter due to the circuit in branch disconnects without counting；
(3) the precharge switching contactor for having any one group in several groups power cell is non-attracting state, then corresponds to this
The coil of the detection relay of group precharge switching contactor is also non-attracting state, and the detection of this group is corresponded in counter loop
The precharge that the normally-closed contact of relay keeps original state and is in channel status, and is normally attracted in several groups power cell switches
The normally opened contact of detection relay in counter loop corresponding to contactor is closed and is in channel status, so that mutually accrued
The normally opened contact of concatenated detection relay and the normally-closed contact of detection relay are formed fully closed logical in the number same branch of device
And be connected, then counter loop corresponding to this group of power cell is connected, and is counted, and confirms that this group of power cell has 1 event
Barrier；
(4) in generation " UV " failure, the voltage feedback signal that switching contactor is pre-charged when malfunction is passed through into institute
It states the 17CN connector interface being arranged in the trigger board in power cell and feeds back to the master control borad, by master control borad by failure generation
Code " UV " or UV3 " is shown on operation panel；
(5) maintenance personal reads counter values, is which group power list to confirm according to the numerical value change of corresponding counter
Member breaks down, and carries out corresponding maintenance work.
It is by trigger board that precharge switching contactor in the power cell, which is attracted the voltage feedback signal of situation,
What the interface of the connector of setting extracted, the connector, which is 17CN connector, to be inserted by four needle jack plugs and four needles
Head plug-in unit composition external member, four needles be a needle, b needle, c needle, d needle, and respectively in corresponding circuit be used for switching signal
The port a, the port b connected with the port c for voltage feedback signal, d port circuit, wherein the port a and the port b is
The switching signal that mainboard sends DC24V is received, the port a connects positive pole, the port b connects power cathode, together
When, the port a is connected to the port the c direct circuit, and the voltage feedback signal is by the port b and d
The voltage feedback signal that the current potential that port is formed extracts, the port d connect positive pole, and the port b connects power cathode.
Four pin plug plug-in units of the 17CN connector are fixed in the trigger board, and the 17CN connector is used for
The voltage feedback signal of precharge switching contactor contact is provided for master control borad and master control borad is mentioned to precharge switching contactor
For switching signal；By taking one group of power cell as an example, the four needle connectors to match with the 17CN connector need to be added,
The external member being made of four needle jack connectors and the four pin plug connectors with a needle, b needle, c needle, d needle, from four needles
1 conducting wire and band a needle, b needle, c are respectively drawn in a needle port, b needle port, c needle port and the d needle port of jack connector
Needle, d needle the connection of four pin plug connectors while, then respectively draw 1 conducting wire from the d needle port, b needle port, and point
It is not connected to No. 1 port, No. 2 ports at the detection both ends relay coil K1, is connect to obtain with the 17CN being arranged in trigger board
The separated time connector for the automatic detection device that the interface of plug-in unit matches, by four needle jack plugs of the 17CN connector from institute
It is pulled up in the trigger board stated, is inserted into four pin plug connectors of the separated time connector, and by four needles of the separated time connector
Jack connector is docked with four pin plug plug-in units of the 17CN connector, is realized under the premise of meeting original function, by institute
The purpose that voltage feedback signal extracts is needed, the several groups power cell used in the frequency converter need to be correspondingly arranged mating
The separated time connector of group number.
It includes information state recorder (oneself that the present invention, which pacifies the automatic detection device that frequency converter UV method for diagnosing faults in river uses,
Band lithium battery), logic automatically control with decision circuitry, overcurrent fast-tripping protection circuit, work light, band antirust and insulation function
Shell, separated time connector and on frequency converter it is each extract voltage feedback signal interface, patched by the separated time
Part is connect with the interface for extracting voltage feedback signal each on frequency converter, is read in each power cell trigger board by frequency converter
The voltage feedback signal of the precharge switching contactor contact feedback in portion, automatically controls and judgement electricity using the logic
The data-signal counted is sent to the information state recorder and is shown the work as a result, described automatically by road
Make indicator light for indicating whether the automatic detection device is in normal operating conditions, the overcurrent fast-tripping protection circuit
Be for preventing the automatic detection device internal over-current from causing the peace river frequency converter internal short circuit fault, it is described
Information state recorder includes counter loop, for recording corresponding power cell fault number, the automatic detection device
Separated time connector be the four needle connectors to match with the 17CN connector being arranged in trigger board, from the separated time connector
While 4 conducting wires are drawn in a needle port, b needle port, c needle port and the d needle port at four this end of needle jack connector, also from b needle
2 conducting wires are drawn in port, d needle port again, and four needle jack connectors of formation are equipped with 6 conducting wires, b needle port, d needle port
2 conducting wires drawn are connected to the both ends of detection relay coil, the several groups power cell used in the frequency converter
The separated time connector of mating group of number and the detection relay of respective numbers need to be correspondingly arranged.
Four pin plug plug-in units of the 17CN connector are fixed in the trigger board, first will be described when being detected
Four needle jack plugs of 17CN connector pull up, then four pin plugs of itself and the separated time connector of the automatic detection device are connect
Plug-in unit docking, then patches the 17CN that four needle jack connectors of the separated time connector are inserted and fixed in the trigger board
On four pin plug plug-in units of part.
The present invention is further explained in the light of specific embodiments.
Embodiment:
The peace river 676H5 frequency converter that the present embodiment is directed to is made of 4 groups of power cells, and every group of power cell output is
200KVA, total 800KVA.Correspondingly, the present embodiment is equipped with four groups of corresponding detection relays and four groups of counter loops.
1~attached drawing 3 with reference to the accompanying drawings are sent using the master control borad of peace river 676H5 frequency converter, receive signal circuit work original
Reason, i.e., the interface of the connector interface in trigger board (driving plate) in power cell --- 17CN connector is (such as 3 institute of attached drawing
Show) it is the only way which must be passed that master control borad sends and receives signal, so voltage feedback signal is extracted by this connector interface
Come, automatic detection device carries out logic and concludes combination through the invention, obtains testing result.
The specific working principle is as follows by the present invention:
The precharge switching signal that the master control borad of peace river 676H5 frequency converter is actually sent out is DC24V voltage switch signal, together
When be transmitted in Fig. 2 the port a (to 17CN), the port b (port a is directly connected to the port c), the port a, the port b are preliminary filling
The input terminal of MC2 repeater relay coil in the wire loop of electric switching contactor.Repeater relay can prevent from being pre-charged
The electric current that switching contactor coil generates when being attracted, the execution unit for the switching signal for sending out master control borad are damaged,
The operating current of the repeater relay coil will be much smaller than the operating current of switching contactor coil, play the work of intermediate amplification
With.When this MC2 repeater relay coil obtain it is electric, make MC2 repeater relay contact 17 and contact 18 be attracted conducting, keep MC1 pre-
The wire loop of charging switching contactor is connected electric, then makes its main contacts (contact 10 and contact 9, contact 12 and contact 11, touching
Put 14 and contact 13) it connects, R1, R2, R3 precharge branch are shorted, switch it to (be pre-charged switching contactor
Effect), it is such as pre-charged switching contactor and is normally attracted, then its auxiliary contact (feedback signal contact 43, contact 44) is closed, the end c
Mouthful, the port d two o'clock connect, make the port d have DC24V voltage feedback signal (for the port b of to 17CN, i.e. the end d
Mouth is "+", the port b is "-"), and send voltage feedback signal back to master control borad.At the same time, then by its auxiliary contact (feedback letter
Number contact 43, contact 44) voltage feedback signal, DC24V feedback signal is introduced into 1 left side of attached drawing respectively by the port d, the port b
The two sides port of the coil of detection relay K1~K4 below 24V, i.e. respectively No. 1 port, No. 2 ports, No. 3 ports, No. 4
(i.e. logic automatically controls and the detection relay in decision circuitry for port, No. 5 ports, No. 6 ports, No. 7 ports and No. 8 ports
Coil), and the corresponding K1~K4 in the right side of attached drawing 1 represents corresponding detection relay contact, and BZ1~BZ4 represents counter line
Circle.By taking one group of power cell as an example, control and decision logic are as follows: if detection relay contact K1 no signal, detects relay
When coil is not attracted (i.e. precharge switching contactor feedback signal contact is not attracted connection), and detect relay contact K2, inspection
Survey relay contact K3, detection relay contact K4 have voltage feedback signal, i.e., in addition to the detection relay where K1
The coil of corresponding detection relay be all normally attracted, then the detection relay contact K2 in the corresponding circuit BZ1 in right side, detection
The normally opened contact of relay contact K3, detection relay contact K4(detection relay) closure, and K1 is the normal of detection relay
Closed contact keeps former closed state, and the circuit BZ1 is connected, and BZ1 counter (up counter) starts counting plus " 1 ", represents 4 groups
The precharge switching contactor voltage feedback signal (attached drawing in that corresponding group of detection relay where K1 in power cell
The port c, the port d in 2 to 17CN) it does not send, i.e., precharge switching contactor, which is not attracted or instantaneously loses, puts, and confirms
This group of power cell has 1 failure.Other group of power cell working principle and so on.
Next, illustrating the specific method for extracting voltage feedback signal: the interface of 3,17CN connector is touching with reference to the accompanying drawings
The port that a connector interface on hair plate (driving plate), i.e. interface are denoted as the four pin plug plug-in units of " a, b, c, d ", and it is solid
It is scheduled in trigger board (driving plate), indicates the port " a, b " at " to 17CN " and the end of " c, d " with two in attached drawing 2 respectively
Mouth is corresponding, and wherein the port a, the port b are to receive master control borad to send DC24V switching signal, and the port a connects positive pole, the end b
Mouth connects power cathode, and the port c, the port d are to provide the Voltage Feedback sent out by the auxiliary contact of precharge switching contactor
Signal transfers back to master control borad and is used, meanwhile, the port a is that direct circuit is connected to the port c, it is clear that as long as it is anti-to be used for voltage
The port d of feedback signal and the common end port (cathode) b of DC24V (wherein the port d connects positive pole, and the port b connects power cathode)
Required voltage feedback signal can be extracted by drawing the current potential that the two is formed.
Connector in automatic detection device of the present invention the production method is as follows:
In order to meet the extraction of original function and voltage feedback signal simultaneously, according to (the driving of trigger board in the prior art
Plate) on 17CN connector specific real sample: word order (see the attached drawing 3) in the form of a, b, c, d was originally inserted in trigger board and (drove
Movable plate) four pin plug plug-in unit of 17CN connector on four needle jack plugs it need to temporarily be pulled up, add a separated time and patch
Part is four needle connector matched with 17CN connector.4(a needle is first drawn at four this end of needle jack connector of separated time connector
Port, b needle port, c needle port, d needle port) root conducting wire while, then from d needle port, b needle port terminate 2 conducting wires come out,
The coil both ends of attached detection relay shown in FIG. 1 are connected respectively to, then by the four of the total separated time connector for drawing 6 conducting wires
This end of needle jack plug is inserted on four pin plug plug-in units of the 17CN connector of above-mentioned trigger board (driving plate), and separated time patches
The other end of 4 (a needle port, b needle port, c needle port, d needle port) conducting wires that part is drawn is four pin plug connectors, with original
Docking is inserted at four this end of needle jack plug of the 17CN connector first pulled up, has thus been reached and has been believed required Voltage Feedback
Number purpose taken out, the voltage feedback signal and under the premise of not only meeting original function, but also needed for capable of extracting.
There are 4 groups of power cells in the present embodiment, the 17CN connector that need to correspond to the trigger board (driving plate) of detection has 4 sets,
Need to add 4 sets of separated time connectors accordingly, i.e. 4 sets of separated time connectors are patched from four needle jacks of every set separated time connector respectively
After drawing 4 conducting wires at four needles (a needle port, b needle port, c needle port, d needle port) port of part, then draw (d needle port, b
Needle port) 2 pieces conducting wires come out, be then connected respectively below the left side DC24V in attached drawing 1 shown in detection relay
Both ends (respectively No. 1 port, No. 2 ports, No. 3 ports, No. 4 ports, No. 5 ports, No. 6 ports, No. 7 ports and No. 8 of coil
Port).
When carrying out automatic detection operation, four needle jacks of the 17CN connector in original trigger board (driving plate) need to only be inserted
Part is pulled up from four pin plug plug-in units, two parts four pin plugs with the separated time connector of automatic detection device of the invention respectively
Connector and the docking of four needle jack connectors.
The present invention can pass through fault point locating for display fault code within the first time of power cell failure
Automatic detection device displays it, and maintenance personal is helped to judge rapidly, repairs work, improves maintenance work effect
Rate.
The present invention can generate all combinations that are open and disclosing and method by using for reference disclosure, although this hair
Bright combination and method is described by detailed implementation process, but those skilled in the art can obviously not depart from this
Method and apparatus described herein are spliced or changed in summary of the invention, spirit and scope, or the certain components of increase and decrease, more
Specifically, all similar replacements and change are apparent to those skilled in the art, they are considered as
It is included among spirit of that invention, range and content.
Claims (3)
1. a kind of peace river frequency converter UV method for diagnosing faults is applied to peace river 676H5 type frequency converter, the peace river frequency converter master
It to be made of master control borad, communication board and interface, power module, operation panel and several groups power cell, the power cell
Mainly by: IGBT, resistance-capacitance absorption, afterflow protection, current detecting, cooling blower, quick fuse protection, trigger board, start-up resistor,
It is pre-charged switching contactor, capacitor and input/output interface to constitute, it is characterised in that steps are as follows for the method for diagnosing faults:
(1) precharge switching contactor is extracted by the connector interface being arranged in the trigger board in the power cell and is attracted feelings
The voltage feedback signal of condition；
(2) several groups power cell is respectively equipped with corresponding detection relay, and is equipped with accordingly and the detection relay
The counter loop of contact connection, the contact of the detection relay are divided into the normally opened contact and detection relay of detection relay
Normally-closed contact, when precharge switching contactor all in the several groups power cell is all attracting state, then and in advance
The coil of the corresponding detection relay of the switching contactor that charges also all is attracting state, the normally-closed contact of corresponding detection relay
It all disconnects and is in open-circuit condition, and the normally opened contact of corresponding detection relay is all closed and is in channel status, so that phase
Answer in the same branch of counter the normally opened contact of concatenated detection relay and the normally-closed contact of detection relay formed it is one disconnected, one
The state of conjunction, counter because in branch circuit disconnect due to without counting；
(3) the precharge switching contactor for having any one group in several groups power cell is non-attracting state, then it is pre- to correspond to this group
The coil of the detection relay of charging switching contactor is also non-attracting state, and the detection relay of this group is corresponded in counter loop
The normally-closed contact of device keeps original state and is in channel status, and the precharge switching being normally attracted in several groups power cell contacts
The normally opened contact of detection relay in counter loop corresponding to device is closed and is in channel status, so that corresponding counter
The normally opened contact of concatenated detection relay and the normally-closed contact of detection relay are formed fully closed logical and are led in same branch
Logical, then counter loop corresponding to this group of power cell is connected, and is counted, confirms that this group of power cell has 1 failure；
(4) in generation " UV " failure, the voltage feedback signal that switching contactor is pre-charged when malfunction is passed through into the function
The 17CN connector interface being arranged in trigger board in rate unit feeds back to the master control borad, by master control borad by fault code
" UV " or UV3 " is shown on operation panel；
(5) maintenance personal reads counter values, is which group power cell hair to confirm according to the numerical value change of corresponding counter
Raw failure, carries out corresponding maintenance work.
2. the peace river frequency converter UV method for diagnosing faults according to claim 1, it is characterised in that: in the power cell
Precharge switching contactor be attracted situation voltage feedback signal be to be mentioned by the interface for the connector being arranged in trigger board
It takes, the connector is 17CN connector, and the external member being made of four needle jack plugs and four pin plug plug-in units is described
Four needles are a needle, b needle, c needle, d needle, and respectively be used for the port a of switching signal, the port b in corresponding circuit and be used for voltage
The port c of feedback signal, the connection of d port circuit, wherein the port a and the port b is to receive mainboard to send cutting for DC24V
Signal is changed, the port a connects positive pole, and the port b connects power cathode, meanwhile, the port a and the c
The connection of port direct circuit, the voltage feedback signal are the voltage that the current potential formed by the port b and the port d extracts
Feedback signal, the port d connect positive pole, and the port b connects power cathode.
3. peace river frequency converter UV method for diagnosing faults according to claim 2, it is characterised in that: the 17CN connector
Four pin plug plug-in units be fixed in the trigger board, the 17CN connector, which is used to provide precharge for master control borad, to be switched
The voltage feedback signal and master control borad of contacts of contactor provide switching signal to precharge switching contactor；Every group of power cell
Need to correspond to and add the four needle connectors to match with the 17CN connector, be by four needle jack connectors and with a needle,
B needle, c needle, d needle four pin plug connectors composition external member, from a needle port, the b needle end of the four needle jack connectors
Mouth, c needle port and d needle port are respectively drawn 1 conducting wire and are connect with the four pin plug connectors with a needle, b needle, c needle, d needle
While, then 1 conducting wire is respectively drawn from the d needle port, b needle port, and be respectively connected to detection relay coil K1 two
No. 1 port, No. 2 ports at end, to obtain the automatic detection to match with the interface for the 17CN connector being arranged in trigger board
The separated time connector of device pulls up four needle jack plugs of the 17CN connector, described in insertion from the trigger board
Four pin plug connectors of separated time connector, and by four needle jack connectors of the separated time connector and the 17CN connector
The docking of four pin plug plug-in units, realize the mesh that extracts required voltage feedback signal under the premise of meeting original function
, the several groups power cell used in the frequency converter need to be correspondingly arranged the separated time connector of mating group of number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710046022.5A CN106841862B (en) | 2017-01-22 | 2017-01-22 | Pacify river frequency converter UV method for diagnosing faults and its automatic detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710046022.5A CN106841862B (en) | 2017-01-22 | 2017-01-22 | Pacify river frequency converter UV method for diagnosing faults and its automatic detection device |
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| Publication Number | Publication Date |
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| CN106841862A CN106841862A (en) | 2017-06-13 |
| CN106841862B true CN106841862B (en) | 2019-10-25 |
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| CN102832794B (en) * | 2012-08-22 | 2015-01-14 | 深圳市英威腾电气股份有限公司 | Frequency converter system and fault processing method thereof |
| CN104833882B (en) * | 2015-05-13 | 2018-05-25 | 浪潮集团有限公司 | Distributed remote automatic frequency-conversion device method for diagnosing faults |
| CN105004946A (en) * | 2015-06-30 | 2015-10-28 | 深圳市汇川技术股份有限公司 | Frequency converter fault analysis system and method and frequency converter |
| CN205103329U (en) * | 2015-10-16 | 2016-03-23 | 武汉钢铁(集团)公司 | Converter fault detection system |
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