CN118033302B - Device and method for detecting electrical performance of frequency converter - Google Patents
Device and method for detecting electrical performance of frequency converter Download PDFInfo
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Abstract
The invention belongs to the technical field of frequency converter detection, and particularly relates to a device and a method for detecting the electrical performance of a frequency converter. The invention can remove the frequency converter with potential leakage hazard in time in the detection stage, can improve the safety in the detection process of the frequency converter, can change the traditional mode of judging the electrical performance of the frequency converter only by detecting the numerical value result at the output end, and can improve the sufficiency of detecting the electrical performance of the frequency converter by detecting abnormal vibration, noise and temperature rise, thereby further reducing the possibility of outflow of defective products.
Description
Technical Field
The invention belongs to the technical field of frequency converter detection, and particularly relates to a device and a method for detecting electrical properties of a frequency converter.
Background
The frequency converter is an electric control device, it can be with fixed voltage and the frequency conversion of power to changeable voltage and frequency, through adjusting the output frequency of frequency converter, can realize the stepless speed regulation to the motor, satisfies different work demands, generally, the frequency converter is after the production is accomplished, need detect the electrical property of frequency converter to ensure the quality of leaving the factory of frequency converter.
At present, during production of the frequency converter, the quality of the produced frequency converter is poor and cannot meet the requirement of the use due to misoperation of part links in production, so that after the frequency converter is produced, the frequency converter needs to be detected, and the detected devices are various, such as an alternating current frequency converter current detection device disclosed in patent publication No. CN 113514684A;
When the frequency converter detects electrical properties, the input end of the frequency converter is required to be connected with a power supply, the input end is connected with a detection instrument through a detection output end, a grounding wire is connected with a grounding wire, after the input voltage and frequency are regulated and controlled through the frequency converter, whether the output voltage and frequency and the like reach the use requirements or not is detected, but because the grounding end of the frequency converter is already connected with the grounding wire in the detection process, even if the frequency converter has the situation that the shell is electrified due to electric leakage, the situation that the shell current is led out by the grounding wire, so that personnel possibly cannot timely generate the defect that the frequency converter has electric leakage, particularly when the frequency converter has tiny electric leakage, the frequency converter still can still work normally, the personnel can not timely discover the electric leakage phenomenon through the numerical change of the detection instrument of the output end, and once the frequency converter has the electric leakage condition, the safety in the detection process is possibly affected, and after the frequency converter flows out, the situation can also cause great potential safety hazards in practical use.
Disclosure of Invention
The present invention is directed to the above-mentioned problems, and provides a device and a method for detecting the electrical performance of a frequency converter.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a converter electrical property detection device, includes the insulation box, the inner wall integrated into one piece of insulation box is provided with the support deckle, the top of support deckle is equipped with the insulation mounting panel, fixture is installed to the terminal surface of insulation mounting panel, two contact conductive mechanism are installed to the terminal surface of insulation mounting panel, and two contact conductive mechanism are connected with the wire jointly, the inner bottom fixed mounting of insulation box has the support frame, the terminal surface of support frame is installed and is used for detecting the current sensor of wire, the controller is installed to the lateral wall of insulation box, the lateral wall fixed mounting of insulation box has bee calling organ and first warning light, current sensor passes through controller and bee calling organ and first warning light electric connection, the top of insulation box articulates there is the case lid, and case lid and insulation box install the outage mechanism jointly, support deckle and insulation mounting panel install vibration sound detection mechanism jointly, the lateral wall fixed mounting of insulation box has the second warning light, vibration sound detection mechanism passes through controller and bee calling organ and second warning light electric connection, the terminal surface mounting of insulation mounting panel installs a plurality of temperature guide mechanisms and each temperature guide mechanism and the equal input terminal of input terminal and the equal fixed connection of input terminal group, the equal input terminal and the equal input terminal of output terminal group.
Preferably, the fixture includes fixed mounting in the curb plate of insulating mounting panel terminal surface both sides, two one side of curb plate all is equipped with the grip block, and two grip blocks all slide the translation setting at the terminal surface of insulating mounting panel, two the lateral wall of grip block all rotates and is equipped with the clamping screw, and two clamping screw respectively with homonymy curb plate threaded connection.
Preferably, the two contact conductive mechanisms comprise round grooves formed in the end faces of the insulation mounting plates, an insulation ring is slidably arranged in each round groove, a pressing spring is fixedly arranged between each insulation ring and the bottom of each round groove, and conductive blocks are fixedly arranged at the tops of the insulation rings and connected through wires.
Preferably, the cover opening and power-off mechanism comprises a fixed block fixedly mounted on the upper side of the inner wall of the insulating box, a pressure switch is fixedly mounted at the top of the fixed block, a contact block corresponding to the pressure switch is fixedly mounted at the lower end of the box cover, the lower end of the contact block is propped against a moving contact of the pressure switch, and the pressure switch is electrically connected with the controller.
Preferably, the vibration sound detection mechanism comprises a plurality of support springs fixedly arranged between an insulation mounting plate and a support frame plate, a bell jar is fixedly arranged at the lower end of the insulation mounting plate, a pull rope is fixedly arranged on the inner top of the bell jar, an impact steel ball is fixedly arranged at the lower end of the pull rope, a connecting plate is fixedly arranged in the support frame plate, a piezoelectric ceramic component is fixedly arranged at the upper end of the connecting plate, an amplifying circuit electrically connected with the piezoelectric ceramic component is fixedly arranged at the lower end of the connecting plate, a first electromagnetic switch electrically connected with the amplifying circuit is fixedly arranged at the lower end of the connecting plate, and the first electromagnetic switch is electrically connected with a second indicator lamp through a controller.
Preferably, each temperature guiding mechanism all includes the hollow insulation sleeve of fixed grafting in insulating mounting panel terminal surface, the inside downside fixed mounting of hollow insulation sleeve has the semiconductor refrigeration stick, a plurality of through-holes have been seted up to the bottom of insulating case, and the inside of each through-hole is all fixed mounting has the flexible heat insulating pad, the semiconductor refrigeration stick runs through the terminal surface of the flexible heat insulating pad that corresponds, and the hot junction of semiconductor refrigeration stick sets up in the outside of insulating case, the inside of hollow insulation sleeve is located the position packing of semiconductor refrigeration stick top has insulating heat conduction filler.
Preferably, each abnormal temperature rise prompting mechanism comprises two insulating cushion blocks fixedly arranged on the inner wall of the hollow heat insulation sleeve, a thermal sensitive element is fixedly arranged between the two insulating cushion blocks, a second electromagnetic switch electrically connected with the thermal sensitive element is fixedly arranged at the bottom of the insulating box, a third prompting lamp is fixedly arranged on the outer side wall of the insulating box, and the second electromagnetic switch is electrically connected with the buzzer and the third prompting lamp through a controller.
Preferably, the inner wall of the insulation box is fixedly provided with a heater, a refrigerator and a temperature controller, the temperature controller is electrically connected with the controller, and the heater and the refrigerator are electrically connected with the temperature controller.
A method of a frequency converter electrical property detection device, the method comprising the steps of:
S1, placing a frequency converter to be detected on the end face of an insulating mounting plate, screwing two clamping screws, enabling the two clamping plates to move in opposite directions until the two clamping plates clamp and fix the frequency converter to be detected on the insulating mounting plate, then connecting an input end and an output end of the frequency converter to be detected with a corresponding input terminal group and an output terminal group respectively through cables, closing a box cover, and starting a controller;
S2, before the frequency converter to be detected starts to detect, the controller controls the temperature controller to start the heater and the refrigerator, when the temperature controller detects that the temperature inside the insulation box is higher, the temperature controller controls the refrigerator to work, when the temperature controller detects that the temperature inside the insulation box is lower, the temperature controller controls the heater to work, the temperature inside the insulation box is kept at 25+/-1 ℃, after the temperature reaches a set value, the temperature controller stops working, and then the controller starts the detection work of the frequency converter to be detected;
S3, when the controller starts the detection work of the frequency converter to be detected, the controller supplies power to the frequency converter through the input terminal group, the current subjected to frequency conversion regulation and control of the frequency converter is output into the controller through the output terminal group, and the controller can display the numerical information of the intensity, the voltage and the frequency of the output current;
s3a, when the frequency converter to be detected has a leakage phenomenon in the detection process, leaked current can be transmitted to the shell of the frequency converter, the current of the shell can flow through the conducting wire through the conducting block, at the moment, the current sensor can detect that the current passes through the conducting wire and transmits an electric signal to the controller, the controller then controls the buzzer and the first indicator lamp to immediately work, at the moment, the situation that the frequency converter to be detected has a leakage hidden trouble is indicated, and personnel immediately stop the whole detection work through the controller;
S3b, when abnormal vibration and noise occur in the frequency converter to be detected in the detection process, the vibration can lead to synchronous shaking of the insulating mounting plate, the vibration can lead to shaking of the impact steel ball in the bell jar by the pull rope, the shaking impact steel ball can generate sound when the impact steel ball impacts the bell jar, the sound generated by the impact and the noise generated by abnormal operation of the frequency converter to be detected can be transmitted to the piezoelectric ceramic component, under the effect of the transmission vibration of the sound wave, the piezoelectric ceramic chip can generate an electric signal, the electric signal is amplified by the amplifying circuit and then is led into the first electromagnetic switch, at the moment, the movable contact of the first electromagnetic switch is magnetically closed, the controller can control the buzzer and the second indicator lamp to immediately work after receiving the closed electric signal of the first electromagnetic switch, at the moment, the phenomenon that the frequency converter to be detected has abnormal vibration and noise is indicated, and personnel immediately stop the whole detection work by the controller;
S3c, when the frequency converter to be detected starts to detect, the controller controls each semiconductor refrigeration rod to start to work, at the moment, heat in the insulating heat conducting filler can be rapidly led out by the semiconductor refrigeration rod, when the frequency converter to be detected is operated with current, the frequency converter to be detected can generate heat, the heat generated by the frequency converter to be detected can be preferentially transferred to the low-temperature position on the same side, so the heat can be transferred into each insulating heat conducting filler, at the moment, the temperature of the insulating heat conducting filler is recovered, when the frequency converter to be detected is abnormally warmed up, the temperature of the insulating heat conducting filler is raised higher, at the moment, the thermistor can reduce the self resistance due to temperature increase, so that the current led into the corresponding second electromagnetic switch is increased, the controller can control the buzzer and the corresponding third indicator lamp to immediately work after receiving the closing electric signal of the second electromagnetic switch, at the moment, the abnormal warming point exists in the frequency converter to be detected, and the position of the abnormal warming point can be known through the third indicator lamp which is turned on;
And S4, under the condition that the buzzer does not work, after the detection of the current intensity, the voltage and the frequency output by the output end of the frequency converter to be detected is qualified, the detection personnel needs to open the box cover and reversely screw the two clamping screws, and then the frequency converter to be detected is taken out.
Compared with the prior art, the frequency converter electrical property detection device and method have the advantages that:
Through the mutual cooperation of insulating case, support the framed board, insulating mounting panel, fixture, controller, input terminal group and output terminal group that set up, can install the converter that waits to detect and accomplish the wiring, and through the mutual cooperation of the contact conductive mechanism that sets up, the wire, the support frame, the current sensor, buzzer and first warning light, can be when the electric leakage appears in the converter, detect leakage current fast, the prompt personnel of immediately ringing, thereby can in time reject the converter that has the electric leakage hidden danger in the detection stage, and the case lid that the cooperation set up and uncap outage mechanism, the security of converter detection in-process can be improved.
Through the mutual cooperation of the vibration sound detection mechanism and the second indicator lamp, abnormal vibration and noise generated during abnormal operation of the frequency converter can be detected in the process of electrifying, and abnormal phenomena of personnel can be automatically reminded, so that the traditional mode of judging the electrical performance of the frequency converter only through the detection numerical value result of the output end can be changed, the sufficiency of detecting the electrical performance of the frequency converter is improved, and the possibility of outflow of defective products is further reduced.
Through the mutually supporting of a plurality of temperature guiding mechanisms that set up, unusual temperature rise suggestion mechanism, can utilize the heat that the converter work produced in the testing process to based on the different phenomenon of heat that the work of each position department of converter produced, when unusual temperature rise appears, can automatic suggestion personnel's frequency converter's unusual temperature rise point position, thereby can be convenient for personnel judge the frequency converter can appear unusual temperature rise's point position fast.
Drawings
FIG. 1 is a schematic diagram of an electrical performance detecting device and method for a frequency converter according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of an insulation box of the device and method for detecting the electrical performance of a frequency converter according to the present invention;
FIG. 3 is a schematic top view of an insulating mounting board for a device and a method for detecting electrical performance of a frequency converter according to the present invention;
FIG. 4 is a schematic diagram of a contact conductive mechanism of a device and a method for detecting electrical performance of a frequency converter according to the present invention;
fig. 5 is a schematic structural diagram of a cover opening and power-off mechanism of the device and the method for detecting the electrical performance of a frequency converter provided by the invention;
FIG. 6 is a schematic diagram of the internal structure of a hollow insulating sleeve of a device and a method for detecting the electrical performance of a frequency converter according to the present invention;
FIG. 7 is a schematic diagram of a vibration acoustic detection mechanism of a device and a method for detecting electrical performance of a frequency converter according to the present invention;
fig. 8 is an enlarged view of the structure of fig. 6, showing an apparatus and a method for detecting electrical performance of a frequency converter according to the present invention.
In the figure: 1 insulating box, 2 supporting frame plates, 3 insulating mounting plates, 4 clamping mechanisms, 41 side plates, 42 clamping plates, 43 clamping screws, 5 contact conducting mechanisms, 51 round grooves, 52 insulating rings, 53 pressing springs, 54 conducting blocks, 6 conducting wires, 7 supporting frames, 8 current sensors, 9 controllers, 10 buzzers, 11 first prompting lamps, 12 box covers, 13 cover opening and power-off mechanisms, 131 fixing blocks, 132 pressure switches, 133 touch blocks, 14 vibration sound detection mechanisms, 141 supporting springs, 142 bell covers, 143 pull ropes, 144 striking steel balls, 145 connecting plates, 146 piezoelectric ceramic assemblies, 147 amplifying circuit devices, 148 first electromagnetic switches, 15 second prompting lamps, 16 temperature guiding mechanisms, 161 hollow heat insulation sleeves, 162 semiconductor refrigerating rods, 163 through holes, 164 flexible heat insulation pads, 165 insulating heat conducting fillers, 17 abnormal temperature rise prompting mechanisms, 171 insulating cushion blocks, 172 heat sensitive elements, 173 second electromagnetic switches, 174 third prompting lamps, 18 input terminal groups, 19 output terminal groups, 20 heaters, 21 refrigerators and 22 temperature controllers.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-8, an electrical performance detection device for a frequency converter comprises an insulation box 1, wherein a supporting frame plate 2 is integrally formed on the inner wall of the insulation box 1, an insulation mounting plate 3 is arranged above the supporting frame plate 2, a clamping mechanism 4 is arranged on the end face of the insulation mounting plate 3, an input terminal group 18 and an output terminal group 19 are fixedly arranged on the inner wall of the insulation box 1, the input terminal group 18 and the output terminal group 19 are electrically connected with a controller 9, the clamping mechanism 4 comprises side plates 41 fixedly arranged on two sides of the end face of the insulation mounting plate 3, clamping plates 42 are arranged on one side of the two side plates 41, the two clamping plates 42 are arranged on the end face of the insulation mounting plate 3 in a sliding and translational manner, clamping screws 43 are rotatably arranged on the side walls of the two clamping plates 42, the two clamping screws 43 are respectively in threaded connection with the side plates 41 on the same side, a sliding block is arranged at the bottom of the clamping plate 42, a sliding groove matched with the sliding block is formed on the end face of the insulation mounting plate 3, and the clamping plates 42 can slide in a translational and sliding manner along the insulation mounting plate 3.
The end face of the insulation mounting plate 3 is provided with two contact conductive mechanisms 5, the two contact conductive mechanisms 5 are connected with a wire 6 together, the inner bottom of the insulation box 1 is fixedly provided with a support frame 7, the end face of the support frame 7 is provided with a current sensor 8 for detecting the wire 6, the current sensor 8 can detect a magnetic field around the conductor and transmit an electric signal to the controller 9 when detecting the magnetic field, the prior art is omitted, the two contact conductive mechanisms 5 comprise round grooves 51 formed in the end face of the insulation mounting plate 3, an insulation ring 52 is slidably arranged in the round grooves 51, a pressing spring 53 is fixedly arranged between the insulation ring 52 and the bottom of the round grooves 51, the top of the insulation ring 52 is fixedly provided with a conductive block 54, the two conductive blocks 54 are connected through the wire 6, and the conductive block 54 can be stably and tightly pressed against the outer shell of the frequency converter through the pressing spring 53.
The controller 9 is installed to the lateral wall of insulation case 1, the lateral wall fixed mounting of insulation case 1 has bee calling organ 10 and first suggestion lamp 11, electric current sensor 8 passes through controller 9 and bee calling organ 10 and first suggestion lamp 11 electric connection, the top of insulation case 1 articulates there is case lid 12, and case lid 12 installs outage mechanism 13 jointly with insulation case 1, outage mechanism 13 uncaps includes fixed mounting in the fixed block 131 of insulation case 1 inner wall upside, and fixed block 131's top fixed mounting has pressure switch 132, the lower extreme fixed mounting of case lid 12 has the touching briquetting 133 corresponding with pressure switch 132 position, and touching briquetting 133's lower extreme and pressure switch 132's moving contact are the counterbalance setting, pressure switch 132 and controller 9 electric connection, when closing case lid 12, touching briquetting 133 can extrude the moving contact of closing pressure switch 132 this moment, controller 9 just can control whole device circular telegram, and when opening case lid 12, controller 9 can control whole device and outage immediately, the security when improving the detection.
The vibration sound detection mechanism 14 is jointly installed with the insulation mounting plate 3, the second indicator lamp 15 is fixedly installed on the side wall of the insulation box 1, the vibration sound detection mechanism 14 is electrically connected with the buzzer 10 and the second indicator lamp 15 through the controller 9, the vibration sound detection mechanism 14 comprises a plurality of support springs 141 fixedly arranged between the insulation mounting plate 3 and the support frame plate 2, the bell jar 142 is fixedly installed at the lower end of the insulation mounting plate 3, the pull rope 143 is fixedly installed on the inner top of the bell jar 142, the impact steel ball 144 is fixedly installed at the lower end of the pull rope 143, the connecting plate 145 is fixedly installed inside the support frame plate 2, the piezoelectric ceramic component 146 is fixedly installed at the upper end of the connecting plate 145, the amplifying circuit 147 electrically connected with the piezoelectric ceramic component 146 is fixedly installed at the lower end of the connecting plate 145, the first electromagnetic switch 148 electrically connected with the amplifying circuit 147 is fixedly installed at the lower end of the connecting plate 145, the first electromagnetic switch 148 is electrically connected with the second indicator lamp 15 through the controller 9, the vibration can lead to deformation of the lattice structure inside the piezoelectric ceramic component 146, and accordingly electric charge separation is generated, electric field is generated inside the piezoelectric ceramic component 146.
The terminal surface of insulating mounting panel 3 installs a plurality of temperature guide mechanism 16, each temperature guide mechanism 16 all includes the hollow insulation cover 161 of fixed grafting in insulating mounting panel 3 terminal surface, the inside downside fixed mounting of hollow insulation cover 161 has the semiconductor refrigeration stick 162, a plurality of through-holes 163 have been seted up to the bottom of insulation case 1, and the inside of each through-hole 163 is all fixed mounting has flexible heat insulating pad 164, the terminal surface of the flexible heat insulating pad 164 that corresponds is run through to the semiconductor refrigeration stick 162, and the hot junction of semiconductor refrigeration stick 162 sets up in the outside of insulation case 1, the inside of hollow insulation cover 161 is located the position of semiconductor refrigeration stick 162 top and is filled with insulating heat conduction filler 165, insulating heat conduction filler 165 can absorb the heat that waits to examine the converter during operation and conduct fast, flexible heat insulating pad 164 can prevent that semiconductor refrigeration stick 162 from influencing the rocking of insulating mounting panel 3.
The inside of each temperature guiding mechanism 16 is all installed unusual temperature rise suggestion mechanism 17, each unusual temperature rise suggestion mechanism 17 is all including two insulating spacer blocks 171 that set up in hollow insulating sheath 161 inner wall fixedly, and fixed mounting has a thermal element 172 between two insulating spacer blocks 171, the bottom fixed mounting of insulation case 1 has a second electromagnetic switch 173 with thermal element 172 electric connection, the lateral wall fixed mounting of insulation case 1 has a third warning light 174, second electromagnetic switch 173 passes through controller 9 and buzzer 10 and third warning light 174 electric connection, thermal element 172 can reduce self resistance value because of the temperature around rising.
The inner wall of the insulation box 1 is fixedly provided with a heater 20, a refrigerator 21 and a temperature controller 22, the temperature controller 22 is electrically connected with the controller 9, the heater 20 and the refrigerator 21 are electrically connected with the temperature controller 22, the temperature controller 22 can detect the real-time temperature inside the insulation box 1, the refrigerator 21 is started when the temperature is higher, and otherwise, the heater 20 is started, so that the temperature of the insulation box 1 at the beginning of detecting the frequency converter to be detected is kept at 25+/-1 ℃.
The principle of operation of the present invention will now be described as follows: placing the frequency converter to be detected on the end face of the insulating mounting plate 3, screwing two clamping screws 43, enabling the two clamping screws 43 to enable the two clamping plates 42 to move in opposite directions until the two clamping plates 42 clamp and fix the frequency converter to be detected on the insulating mounting plate 3, connecting the input end and the output end of the frequency converter to be detected with the corresponding input terminal group 18 and the corresponding output terminal group 19 respectively through cables, closing the box cover 12, and starting the controller 9;
Before the frequency converter to be detected starts to detect, the controller 9 controls the temperature controller 22 to start the heater 20 and the refrigerator 21, when the temperature controller 22 detects that the temperature inside the insulation box 1 is higher, the temperature controller 22 controls the refrigerator 21 to work, when the temperature controller 22 detects that the temperature inside the insulation box 1 is lower, the temperature controller 22 controls the heater 20 to work, the temperature inside the insulation box 1 is kept at 25+/-1 ℃, after the temperature reaches a set value, the temperature controller 22 stops working, and then the detection work of the frequency converter to be detected is started through the controller 9;
after the controller 9 is started, the controller 9 supplies power to the frequency converter through the input terminal group 18, the current subjected to frequency conversion regulation and control of the frequency converter is output into the controller 9 through the output terminal group 19, and the controller 9 can display numerical information of the output current intensity, voltage and frequency;
If the frequency converter to be detected has a leakage phenomenon in the detection process, the leaked current can be transmitted to the shell of the frequency converter, the current of the shell can flow through the conducting wire 6 through the conducting block 54, when the current passes through the conducting wire 6, a magnetic field is generated around the conducting wire 6, after the magnetic induction element in the current sensor 8 detects the magnetic field generated around the conducting wire 6 (namely, the current passes through the conducting wire 6), an electric signal can be transmitted to the controller 9, the controller 9 then controls the buzzer 10 and the first indicator lamp 11 to immediately work, at the moment, the situation that the frequency converter to be detected has a leakage hidden trouble is indicated, and personnel immediately stop the whole detection work through the controller 9;
If abnormal vibration and noise occur in the frequency converter to be detected in the detection process, under the action of the supporting spring 141, the vibration can lead the insulating mounting plate 3 to shake synchronously, the vibration can lead the pull rope 143 to drive the impact steel ball 144 to shake in the bell jar 142, the shake impact steel ball 144 can generate sound when impacting the bell jar 142, the sound generated by impact and the noise generated by abnormal operation of the frequency converter to be detected can be transmitted to the piezoelectric ceramic component 146, under the effect of the transmission vibration of the sound wave, the vibration can lead the lattice structure in the piezoelectric ceramic component 146 to deform, thereby generating charge separation, electric fields are formed in the piezoelectric ceramic component 146, current is generated, the current is amplified by the amplifying circuit 147 and then is led into the first electromagnetic switch 148, at this time, the moving contact of the first electromagnetic switch 148 is magnetically attracted and closed, the controller 9 can control the buzzer 10 and the second indicator lamp 15 to work immediately after receiving a closing electric signal of the first electromagnetic switch 148, at this time, the phenomenon that the abnormal vibration and noise occur in the frequency converter to be detected is illustrated, and the whole detection work is stopped immediately by the controller 9;
When the frequency converter to be detected starts to detect, the controller 9 controls each semiconductor refrigeration rod 162 to start working, one end of the semiconductor refrigeration rod 162 positioned inside the hollow heat insulation sleeve 161 starts to absorb heat and the heat is led out through the other end (one end of the semiconductor refrigeration rod 162 positioned outside the insulation box 1), so that the heat in the insulation heat conduction filler 165 can be quickly led out by the semiconductor refrigeration rod 162, when the frequency converter to be detected is operated by current, the frequency converter to be detected can generate heat, the heat generated by the frequency converter to be detected can be preferentially transferred to the low temperature position at the same side, so that the heat in each area inside the frequency converter can be transferred to the insulation heat conduction filler 165 in the hollow heat insulation sleeve 161 at the corresponding position, at this time, the temperature of the insulation heat conduction filler 165 rises, when the frequency converter to be detected abnormally rises, the temperature of the insulation heat conduction filler 165 rises higher, at this time, the thermistor will decrease its own resistance due to the temperature increase, so that the current flowing into the corresponding second electromagnetic switch 173 is increased, at this time, the moving contact of the second electromagnetic switch 173 will be magnetically closed due to the flowing of sufficient current, after receiving the closing electric signal of the second electromagnetic switch 173, the controller 9 will control the buzzer 10 and the corresponding third indicator lamp 174 to operate immediately, at this time, to indicate that the frequency converter to be detected has an abnormal temperature rise region, and the position of the abnormal temperature rise region can be known through the third indicator lamps 174 that are lighted (wherein each third indicator lamp 174 has its own number, each third indicator lamp 174 corresponds to each region in the frequency converter and the corresponding hollow heat insulation sleeve 161 through its own number, for example, the third indicator lamp 174 with the number 1 corresponds to the installation position of the driving circuit in the frequency converter, and personnel check the number of the third indicator lamp 174, the corresponding area with abnormal temperature rise in the frequency converter can be known, and the subsequent overhaul is convenient;
under the condition that the buzzer 10 does not work, after the detection of the current intensity, the voltage and the frequency output by the output end of the frequency converter to be detected is qualified, the detection personnel needs to open the box cover 12 and reversely screw the two clamping screws 43, and then the frequency converter to be detected is taken out.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The utility model provides a frequency converter electrical property detection device, includes insulation box (1), a serial communication port, the inner wall integrated into one piece of insulation box (1) is provided with support framed board (2), the top of support framed board (2) is equipped with insulation mounting panel (3), fixture (4) are installed to the terminal surface of insulation mounting panel (3), two contact conductive mechanism (5) are installed to the terminal surface of insulation mounting panel (3), and two contact conductive mechanism (5) are connected with wire (6) jointly, the inner bottom fixed mounting of insulation box (1) has support frame (7), current inductor (8) that are used for detecting wire (6) are installed to the terminal surface of support frame (7), controller (9) are installed to the lateral wall of insulation box (1), buzzer (10) and first warning light (11) are installed to the lateral wall fixed mounting of insulation box (1), current inductor (8) are through controller (9) and buzzer (10) and first warning light (11) electric connection, top articulated case lid (12) of insulation box (1), and insulation box (1) are installed jointly with vibration detection frame (14) and insulation box (1) are installed jointly and are taken care of vibration mechanism (14), the utility model discloses a vibration sound inspection device, including insulating case (1), controller (9), buzzer (10), second warning light (15) are examined to lateral wall fixed mounting of insulating case (1), vibration sound inspection mechanism (14) are through controller (9) and buzzer (10) and second warning light (15) electric connection, a plurality of temperature guiding mechanism (16) are installed to the terminal surface of insulating mounting panel (3), and abnormal temperature rise warning mechanism (17) are all installed to the inside of each temperature guiding mechanism (16), the inner wall fixed mounting of insulating case (1) has input terminal group (18) and output terminal group (19), input terminal group (18) and output terminal group (19) all with controller (9) electric connection.
2. The device for detecting the electrical performance of the frequency converter according to claim 1, wherein the clamping mechanism (4) comprises side plates (41) fixedly installed on two sides of the end face of the insulating mounting plate (3), one side of each side plate (41) is provided with a clamping plate (42), the two clamping plates (42) are slidably and translationally arranged on the end face of the insulating mounting plate (3), the side walls of the two clamping plates (42) are rotatably provided with clamping screws (43), and the two clamping screws (43) are respectively in threaded connection with the side plates (41) on the same side.
3. The device for detecting the electrical performance of the frequency converter according to claim 2, wherein the two contact conductive mechanisms (5) comprise round grooves (51) formed in the end faces of the insulation mounting plate (3), insulation rings (52) are slidably arranged in the round grooves (51), pressing springs (53) are fixedly arranged between the insulation rings (52) and the bottoms of the round grooves (51), conductive blocks (54) are fixedly arranged at the tops of the insulation rings (52), and the two conductive blocks (54) are connected through a wire (6).
4. The device for detecting the electrical performance of the frequency converter according to claim 3, wherein the cover opening and power-off mechanism (13) comprises a fixed block (131) fixedly installed on the upper side of the inner wall of the insulation box (1), a pressure switch (132) is fixedly installed on the top of the fixed block (131), a touch block (133) corresponding to the position of the pressure switch (132) is fixedly installed at the lower end of the box cover (12), the lower end of the touch block (133) is propped against a moving contact of the pressure switch (132), and the pressure switch (132) is electrically connected with the controller (9).
5. The device for detecting electrical properties of a frequency converter according to claim 4, wherein the vibration and sound detection mechanism (14) comprises a plurality of supporting springs (141) fixedly arranged between an insulation mounting plate (3) and a supporting frame plate (2), a bell jar (142) is fixedly arranged at the lower end of the insulation mounting plate (3), a pull rope (143) is fixedly arranged at the inner top of the bell jar (142), an impact steel ball (144) is fixedly arranged at the lower end of the pull rope (143), a connecting plate (145) is fixedly arranged at the inner part of the supporting frame plate (2), a piezoelectric ceramic component (146) is fixedly arranged at the upper end of the connecting plate (145), an amplifying circuit (147) electrically connected with the piezoelectric ceramic component (146) is fixedly arranged at the lower end of the connecting plate (145), and a first electromagnetic switch (148) electrically connected with the amplifying circuit (147) is fixedly arranged at the lower end of the connecting plate (145), and the first electromagnetic switch (148) is electrically connected with the second indicator lamp (15) through the controller (9).
6. The device for detecting electrical properties of a frequency converter according to claim 5, wherein each temperature guiding mechanism (16) comprises a hollow heat insulation sleeve (161) fixedly inserted into an end face of the insulating mounting plate (3), a semiconductor cooling rod (162) is fixedly mounted at the lower side of the inside of the hollow heat insulation sleeve (161), a plurality of through holes (163) are formed in the bottom of the insulating box (1), flexible heat insulation pads (164) are fixedly mounted in the inside of each through hole (163), the semiconductor cooling rod (162) penetrates through the end face of the corresponding flexible heat insulation pad (164), the hot end of the semiconductor cooling rod (162) is arranged on the outer side of the insulating box (1), and insulating heat conducting filler (165) is filled in the position, above the semiconductor cooling rod (162), of the inside of the hollow heat insulation sleeve (161).
7. The device for detecting electrical properties of a frequency converter according to claim 6, wherein each abnormal temperature rise prompting mechanism (17) comprises two insulating cushion blocks (171) fixedly arranged on the inner wall of a hollow heat insulation sleeve (161), a heat sensitive element (172) is fixedly installed between the two insulating cushion blocks (171), a second electromagnetic switch (173) electrically connected with the heat sensitive element (172) is fixedly installed at the bottom of the insulating box (1), a third prompting lamp (174) is fixedly installed on the outer side wall of the insulating box (1), and the second electromagnetic switch (173) is electrically connected with the buzzer (10) and the third prompting lamp (174) through a controller (9).
8. The device for detecting the electrical performance of the frequency converter according to claim 7, wherein a heater (20), a refrigerator (21) and a temperature controller (22) are fixedly arranged on the inner wall of the insulation box (1), the temperature controller (22) is electrically connected with the controller (9), and the heater (20) and the refrigerator (21) are electrically connected with the temperature controller (22).
9. The method of claim 8, wherein the method comprises the steps of: s1, placing a frequency converter to be detected on the end face of an insulating mounting plate (3), screwing two clamping screws (43), enabling the two clamping plates (42) to move in opposite directions by the two clamping screws (43) until the frequency converter to be detected is clamped and fixed on the insulating mounting plate (3) by the two clamping plates (42), connecting an input end and an output end of the frequency converter to be detected with a corresponding input terminal group (18) and an output terminal group (19) respectively through cables, closing a box cover (12), And activating the controller (9); S2, before the frequency converter to be detected starts to detect, a controller (9) controls a temperature controller (22) to start a heater (20) and a refrigerator (21), when the temperature controller (22) detects that the temperature inside an insulation box (1) is higher, the temperature controller (22) controls the refrigerator (21) to work, when the temperature controller (22) detects that the temperature inside the insulation box (1) is lower, the temperature controller (22) controls the heater (20) to work, the temperature inside the insulation box (1) is kept at 25+/-1 ℃, after the temperature reaches a set value, the temperature controller (22) stops working, and then the detection work of the frequency converter to be detected is started through the controller (9); S3, when the controller (9) starts the detection work of the frequency converter to be detected, the controller (9) supplies power to the frequency converter through the input terminal group (18), the current subjected to frequency conversion regulation and control of the frequency converter is output into the controller (9) through the output terminal group (19), and the controller (9) can display the numerical information of the output current intensity, voltage and frequency; s3a, when the frequency converter to be detected has a leakage phenomenon in the detection process, leaked current can be transmitted to the shell of the frequency converter, the current of the shell can flow through the conducting wire (6) through the conducting block (54), at the moment, the current sensor (8) can detect that the current passes through the conducting wire (6) and transmits an electric signal to the controller (9), the controller (9) then controls the buzzer (10) and the first indicator lamp (11) to work immediately, at the moment, the situation that the frequency converter to be detected has a leakage hidden danger is indicated, and personnel immediately stop the whole detection work through the controller (9); s3b, when abnormal vibration and noise occur in the frequency converter to be detected in the detection process, the vibration can lead the insulating mounting plate (3) to shake synchronously, the vibration can lead the pull rope (143) to drive the impact steel ball (144) to shake in the bell jar (142), the shake impact steel ball (144) can generate sound when impacting the bell jar (142), the sound generated by impact and the noise generated by abnormal operation of the frequency converter to be detected can be transmitted to the piezoelectric ceramic component (146), under the transmission vibration effect of the sound wave, the piezoelectric ceramic sheet can generate an electric signal, and the electric signal is amplified by the amplifying circuit (147) and then is transmitted into the first electromagnetic switch (148), At the moment, the movable contact of the first electromagnetic switch (148) is magnetically closed, the controller (9) can control the buzzer (10) and the second prompting lamp (15) to work immediately after receiving the closing electric signal of the first electromagnetic switch (148), the phenomenon that the frequency converter to be detected has abnormal vibration and noise is described at the moment, and personnel stop the whole detection work immediately through the controller (9); S3c, when the frequency converter to be detected starts to detect, the controller (9) controls each semiconductor refrigerating rod (162) to start working, at the moment, heat in the insulating heat conducting filler (165) can be rapidly led out by the semiconductor refrigerating rods (162), when the frequency converter to be detected is electrified to work, the frequency converter to be detected can generate heat, the heat generated by the frequency converter to be detected can be preferentially transferred to the low-temperature position on the same side, so that the heat can be transferred into each insulating heat conducting filler (165), at the moment, the temperature of the insulating heat conducting filler (165) is recovered, when the frequency converter to be detected is abnormally warmed, the temperature of the insulating heat conducting filler (165) is higher in a rebound manner, At the moment, the thermistor can reduce the self resistance due to the increase of the temperature, so that the current flowing into the corresponding second electromagnetic switch (173) is increased, the controller (9) can control the buzzer (10) and the corresponding third indicator lamp (174) to work immediately after receiving the closing electric signal of the second electromagnetic switch (173), at the moment, the situation that the frequency converter to be detected has an abnormal heating point is explained, and the position of the abnormal heating point can be obtained through the lighted third indicator lamp (174); And S4, under the condition that the buzzer (10) does not work, after the detection of the intensity, the voltage and the frequency of the current output by the output end of the frequency converter to be detected is qualified, the detection personnel needs to open the box cover (12) and reversely screw the two clamping screws (43), and then the frequency converter to be detected is taken out.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061347A (en) * | 2018-07-24 | 2018-12-21 | 巢湖市金辉自控设备有限公司 | A kind of transducer element automatic detection device |
| CN212364403U (en) * | 2020-04-24 | 2021-01-15 | 辽宁海纳百川电力设计有限公司 | Intelligent current detection device capable of preventing current leakage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5065887B2 (en) * | 2005-02-23 | 2012-11-07 | 旭化成エレクトロニクス株式会社 | Current measuring device |
| CN218956677U (en) * | 2022-11-30 | 2023-05-02 | 山东汇科电气技术有限公司 | Frequency detection equipment of frequency converter |
| CN220019762U (en) * | 2023-05-31 | 2023-11-14 | 常州英豪自动化科技有限公司 | Frequency converter fault detection equipment |
| CN220603603U (en) * | 2023-06-29 | 2024-03-15 | 苏州枫锦自动化设备科技有限公司 | Frequency converter performance testing device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061347A (en) * | 2018-07-24 | 2018-12-21 | 巢湖市金辉自控设备有限公司 | A kind of transducer element automatic detection device |
| CN212364403U (en) * | 2020-04-24 | 2021-01-15 | 辽宁海纳百川电力设计有限公司 | Intelligent current detection device capable of preventing current leakage |
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