WO2019123800A1 - Grue et équipement électronique de puissance - Google Patents

Grue et équipement électronique de puissance Download PDF

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Publication number
WO2019123800A1
WO2019123800A1 PCT/JP2018/038446 JP2018038446W WO2019123800A1 WO 2019123800 A1 WO2019123800 A1 WO 2019123800A1 JP 2018038446 W JP2018038446 W JP 2018038446W WO 2019123800 A1 WO2019123800 A1 WO 2019123800A1
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WIPO (PCT)
Prior art keywords
abnormality
switch
capacitor
power
voltage
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Application number
PCT/JP2018/038446
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English (en)
Japanese (ja)
Inventor
泰久 田坂
英昭 湯浅
Original Assignee
住友重機械工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 住友重機械工業株式会社 filed Critical 住友重機械工業株式会社
Priority to JP2019560826A priority Critical patent/JP7272961B2/ja
Publication of WO2019123800A1 publication Critical patent/WO2019123800A1/fr
Priority to JP2023037707A priority patent/JP7432033B2/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • the present invention relates to a crane and power electronics equipment.
  • an AC power supply is connected to the DC bus via a converter device that converts AC power into DC power.
  • the storage battery is connected to the DC bus via a charge / discharge controller that controls the charge / discharge timing of the storage battery and the amount of power.
  • the AC motor is connected to the DC bus via an inverter that converts DC power into AC power.
  • Power electronics equipment is used for hybridizing cranes.
  • the power electronics device mainly includes a capacitor and a converter, and is connected to the DC bus of the crane.
  • the startup operation of the crane also starts up the power electronics equipment.
  • a power electronics device with high reliability in terms of safety is desirable.
  • FIG. 1 is a block diagram of a conventional power electronic device.
  • the power electronics device 100R includes a motor 102 that is a load, a converter device 110, and a load driving device 120.
  • Converter 110 generates a DC link voltage V DC boosts the DC voltage V E from the DC power source 104, such as a battery, supplies to a load driving device 120 via a DC link 130.
  • the load drive device 120 is, for example, a motor drive device, and includes an inverter 122 that drives a motor 102 that is a load.
  • a large capacity DC link capacitor 132 is connected to the DC link 130.
  • a large capacity smoothing capacitor 124 is also connected to the input of the inverter 122.
  • the magnetic contactor MC1 and the magnetic contactor MC2 are turned on.
  • Switches Relays and electromagnetic contactors (hereinafter collectively referred to as switches) have mechanical contacts, and thus deteriorate with time due to oxidation and wear.
  • the deterioration with time of the relay RY1 and the magnetic contactor MC1 particularly becomes a problem. Therefore, in general, parts with an auxiliary contact are adopted as these switches, and failure detection (welding or open detection) using an answer back signal is widely performed.
  • FIG. 2 is a block diagram of a conventional power electronic device.
  • the power electronic device 100S of FIG. 2 further includes a redundant switch RY2 on the negative electrode (N pole) side instead of using a switch having no auxiliary contact. Then, the switch RY1 (MC1) on the positive electrode side and the switch RY2 on the negative electrode side are sequentially conducted or disconnected, and when the voltage or current in each state deviates from the expected value in the normal state, it is determined as abnormal.
  • a switch with an auxiliary contact used in the power electronic device 100R of FIG. 1 is generally expensive, often large in size, and sometimes has difficulty in adoption.
  • one of the exemplary objects of an embodiment thereof is a crane equipped with a power electronic device having higher safety at startup and a power electronic device mounted on the crane. It is to provide.
  • one of the exemplary objects of the embodiment is to provide a power electronic device capable of detecting the deterioration of the switch.
  • the crane includes a drive unit that drives the main body unit, the suspension operation unit, the traveling unit, and the suspension operation unit, and a storage system that supplies power to the drive unit.
  • the crane has a function of diagnosing an abnormality of the storage system at startup or termination.
  • the power electronics device provides a capacitor, an inrush current prevention circuit including a switch provided between the DC power supply and the capacitor, and gives a switch command or conduction command to the switch in the determination period, and prevents the voltage or inrush current of the capacitor at that time. And a determinator for detecting a switch abnormality based on the current flowing through the circuit.
  • FIG. 7A and 7B are a schematic front view and a schematic side view, respectively, of a crane system according to the present embodiment.
  • FIG. 8 is a power system diagram of the crane system.
  • the crane includes a drive unit that drives the main body unit, the suspension operation unit, the traveling unit, and the suspension operation unit, and a storage system that supplies power to the drive unit.
  • the crane has a function of diagnosing an abnormality of the storage system at startup or termination.
  • the crane may include an abnormality notification unit that detects an abnormality at startup and reports the presence of the abnormality, or detects an abnormality at the end and reports the presence of the abnormality.
  • the abnormality notification unit is a notification unit provided in the remote control unit in the case of remote control, and in the case of automatic operation, is a notification unit provided in the management building via the communication unit, and in the case of manual operation, the operation You may alert
  • the abnormality notification unit may change the notification content according to the type of abnormality. In the case of an abnormality at a level where work is restricted, an alarm of a predetermined first level is reported, replacement or maintenance is recommended, but when an abnormality at a level where work is not restricted has occurred, from the first level The low level second level abnormality may be reported.
  • the work may be started in a work mode not using the power storage system by a predetermined mode change operation.
  • At least one of the traveling speed and the operating speed of the suspension may be limited.
  • the power electronics device provides a capacitor, an inrush current prevention circuit including a switch provided between the DC power supply and the capacitor, and gives a switch command or conduction command to the switch in the determination period, and prevents the voltage or inrush current of the capacitor at that time. And a determinator for detecting a switch abnormality based on the current flowing through the circuit. According to this embodiment, deterioration of the switch can be detected without using a switch with an auxiliary contact or a redundant switch. In addition, the cost of power electronics can be reduced.
  • the determiner temporarily gives a shutoff command to the switch during a charging period for giving a conduction command to the switch to charge the capacitor, and judges the presence or absence of an abnormality based on a change in current flowing in the inrush current prevention circuit at that time. You may If the switch is shut off normally while the switch is commanded to shut off, the current will be zero. On the contrary, when deterioration such as welding occurs in the switch, the current continues to flow. Therefore, the abnormality of the switch can be determined based on the current state of the switch (conduction / shutdown) and the change of the current.
  • the determiner may temporarily give a shutoff command to the switch during a charging period for giving a conduction command to the switch to charge the capacitor, and judge presence or absence of abnormality based on a change in voltage of the capacitor at that time. . If the switch is shut off normally while the shutoff command is given to the switch, the charge on the capacitor is stopped, and the voltage change is zero. On the contrary, when deterioration such as welding occurs in the switch, the charging current to the capacitor continues to flow, and the voltage of the capacitor continues to increase. Therefore, the abnormality of the switch can be determined based on the current state of the switch (conduction / shutdown) and the voltage change of the capacitor.
  • the power electronics device may further comprise a converter device provided between the inrush current protection circuit and the capacitor.
  • the converter device may perform switching operation in a state where a shutoff command is given to the switch, and the presence or absence of abnormality may be determined based on the current flowing through the inrush current prevention circuit at that time.
  • the switch If the switch is normally disconnected in the state where the switch command is given to the switch, the current flowing through the inrush current prevention circuit is zero even if the converter device is switched. On the other hand, when deterioration such as welding occurs in the switch, current flows through the inrush current prevention circuit. Therefore, the presence or absence of abnormality can be determined based on the current.
  • the power electronics device may further comprise a converter device provided between the inrush current protection circuit and the capacitor.
  • the converter device may perform switching operation in a state where a shutoff command is given to the switch, and the presence or absence of abnormality may be determined based on the voltage of the capacitor at that time.
  • the switch is normally shut off in the state where the switch is instructed to shut off, the current flowing through the inrush current prevention circuit is zero even if the converter device is switched, so the voltage of the capacitor does not rise.
  • the current flows through the inrush current prevention circuit, and the voltage of the capacitor rises. Therefore, the presence or absence of abnormality can be determined based on the voltage of the capacitor.
  • the state in which the member A is connected to the member B means that the members A and B are electrically connected in addition to the case where the members A and B are physically and directly connected. It also includes the case of indirect connection via other members that do not substantially affect the connection state of the connection or do not impair the function or effect provided by the connection.
  • a state where the member C is provided between the member A and the member B means that the member A and the member C, or the member B and the member C are directly connected, and It also includes the case of indirect connection via other members that do not substantially affect the connection state of the connection or do not impair the function or effect provided by the connection.
  • FIG. 3 is a block diagram of the electronic device according to the embodiment.
  • the power electronics device 200 includes a DC power supply 202, an inrush current prevention circuit 210, a DC link capacitor 220, and a converter device 230.
  • DC power supply 202 is a battery or a capacitor or an external converter, generates a DC voltage (also referred to as input voltage) V E.
  • a DC link capacitor 220 is connected to the DC link 204.
  • a load driving device as shown in FIG. 1 or 2 is connected to the DC link 204.
  • the type of load is not particularly limited.
  • an inrush current prevention circuit 210 is provided between the DC power supply 202 and the DC link capacitor 220.
  • Inrush current prevention circuit 210 includes at least one switch provided between DC power supply 202 and DC link capacitor 220.
  • the inrush current preventing circuit 210 includes a first switch MC1, the charging resistor R J and the second switch RY1 is provided in series with the parallel paths to the first switch MC1.
  • the first switch MC1 is a magnetic contactor
  • the second switch RY1 is a relay.
  • Converter device 230 is provided between inrush current prevention circuit 210 and DC link capacitor 220. Converter device 230 in the operating state, boosts the input voltage V E, to generate a high DC link voltage V DC from the DC voltage V E to the DC link 204 (a power running operation).
  • the controller 240 includes a converter controller 242 that controls the converter device 230. Converter controller 242 generates control signal S CTRL that defines the duty ratio of the gate signal of converter device 230.
  • the controller 240 is fed back with a digital feedback signal D VDC indicating the DC link voltage V DC .
  • the controller 240 adjusts the duty ratio by feedback so that the feedback signal D VDC approaches the target value D REF that defines the target voltage of the DC link voltage V DC .
  • the gate driver 232 drives the transistors M1 and M2 of the converter device 230 based on the duty ratio indicated by the control signal S CTRL .
  • the current sensor 234 is, for example, current transformer, for detecting a current I L flowing through the reactor L1.
  • the controller 240 receives a digital value D IL indicating the current I L and a digital value D VE indicating the input voltage V E.
  • the feedback control in the converter controller 242, and the input voltage V E, may reflect the current I L flowing through the reactor L1 of the converter device 230.
  • the converter device 230 can be operated in a regenerative manner, and excess energy on the DC link 204 side may be recovered to the DC power supply 202.
  • the controller 240 controls the on / off of the switches MC1 and RY1 included in the inrush current prevention circuit 210 and has a function of detecting an abnormality of the switches MC1 and RY1.
  • the controller 240 stops the converter device 230 and turns on the second switch RY1. Thereby, the charging current I CHG flows through the resistor R J , the second switch RY1, and the diode D11, and the DC link capacitor 220 is charged.
  • the first switch MC1 When the DC link voltage V DC rises to such an extent that there is no possibility of inrush current to the DC link capacitor 220, the first switch MC1 is turned on. Thereafter, the controller 240 starts the operation of the converter device 230.
  • the controller 240 includes a determiner 244. In the determination period, the determiner 244 gives the switch MC1 or RY1 a shutoff command or a conduction command, and the command (the use status of the switch) and the voltage V DC of the DC link capacitor 220 or the rush current prevention circuit 210 at that time. An abnormality of the switches MC1 and RY1 is detected based on the combination of currents.
  • the current sensor 234 can be grasped as detecting the current (referred to as input current) I IN flowing to the inrush current prevention circuit 210.
  • the input current I IN is nothing but the reactor current I L in the operating state of the converter device 230, and nothing but the charge current I CHG during the charging period.
  • abnormality detection by the determiner 244 will be described with reference to three embodiments.
  • FIG. 4 is a diagram for explaining abnormality detection by the determination unit 244.
  • the controller 240 starts the charging of the DC link capacitor 220 provide a conduction command to the second switch RY1.
  • the controller 240 inserts the determination period ⁇ DET1 into the charge period, and temporarily gives a cutoff command (t 1 to t 2 ) to the second switch RY1 during the determination period ⁇ DET1 .
  • the determiner 244 determines the presence or absence of an abnormality based on the change of the input current I IN flowing through the inrush current prevention circuit in the determination period ⁇ DET1 .
  • the determiner 244 can determine the abnormality of the switch based on the input current I IN in the determination period ⁇ DET1 . For example determiner 244, when the digital value DI L in the determination period tau DET1 is higher than a predetermined threshold abnormality may be determined to be normal when low.
  • a second switch RY1 may be on again.
  • the increased DC link voltage V DC until the input voltage V E is substantially equal to the voltage level at time t 3 when there is no possibility of inrush current may provide a conduction command to the first switch MC1. Then, the converter device 230 at time t 4 is started operation.
  • the end time t 2 of the determination period tau DET1 if DC link voltage V DC is sufficiently high to the extent there is no risk of inrush current, and turned immediately first switch MC1 at time t 2, the first switch The DC link capacitor 220 may be charged via the MC1.
  • the determiner 244 determines the presence or absence of an abnormality based on the change of the DC link voltage V DC in the determination period ⁇ DET1 . If the second switch RY1 is normally disconnected while the second switch RY1 is given a cutoff command, the charging to the DC link capacitor 220 is stopped, so the rise of the DC link voltage V DC is stopped as shown by the solid line. And its voltage change is zero. On the other hand, when deterioration such as welding occurs in the second switch RY1, the charging current I CHG continues to flow in the DC link capacitor 220, so the DC link voltage V DC continues to increase as shown by the one-dot chain line.
  • the determiner 244 can determine the abnormality of the second switch RY1 based on the DC link voltage V DC in the determination period ⁇ DET1 .
  • the determiner 244 may determine normal when the amount of change of the digital value D VDC in the determination period ⁇ DET1 is substantially zero and abnormal when the amount of change is not zero. More specifically, the digital value D VDC is sampled at each of the start time t 1 and the end time t 2 of the determination period, and when the difference between them is larger than a predetermined threshold value, it is determined as abnormal. May be
  • the determination period ⁇ DET1 in the first embodiment or the second embodiment will be described.
  • the determination period tau DET1 is a after a predetermined delay time from the charging start time t 0, may be the start time t 1 of the determination period tau.
  • DC link voltage V DC reaches the threshold time may be used as the start time t 1 of the determination period ⁇ a.
  • the input current I IN during the charging period may be monitored, and the time when the input current I IN has dropped to a predetermined reference value after passing the peak may be set as the start time t 1 of the determination period ⁇ .
  • FIG. 5 is a diagram for explaining the abnormality detection by the determination unit 244.
  • the determination period ⁇ DET2 is inserted.
  • the controller 240 is given a cutoff command to both the first switch MC1 and the second switch RY1. Then, converter device 230 is brought into an operating state.
  • the determination period tau DET2 may be inserted in the vicinity of the time t 3 in FIG.
  • the DC link voltage V DC is substantially equal to the input voltage V E. If the switches MC1 and RY1 of the inrush current prevention circuit 210 are normally turned off when the converter device 230 performs switching operation, the DC link voltage V DC does not increase as shown by the solid line, and the original voltage Maintain the level (here V E ). If an abnormality occurs in any of the switches MC1 and RY1, as indicated by the one-dot and dash line, the DC link voltage V DC rises as a result of the boosting operation of the converter device 230. Therefore, the determiner 244 can detect an abnormality of the switches MC1 and RY1 based on the voltage change amount in the determination period ⁇ DET2 .
  • the determiner 244 may determine normal when the amount of change of the digital value D VDC in the determination period ⁇ DET2 is substantially zero and abnormal when the amount of change is not zero. More specifically, the digital value D VDC is sampled at each of the start time t 1 and the end time t 2 of the determination period, and when the difference between them is larger than a predetermined threshold value, it is determined as abnormal. May be
  • the determiner 244 determines the presence or absence of an abnormality based on the change of the input current I IN in the determination period ⁇ DET2 . If both the first switch MC1 and the second switch RY1 are normally disconnected in the determination period ⁇ DET2 , the input current I IN is zero as indicated by the solid line. On the contrary, when any one of the first switch MC1 and the second switch RY1 has an abnormality, the input current I IN becomes non-zero as shown by the one-dot chain line. Therefore, the determiner 244 can determine the abnormality of the switch based on the input current I IN in the determination period ⁇ DET2 . For example determiner 244, when the digital value DI L in the determination period tau DET2 is higher than a predetermined threshold abnormality may be determined to be normal when low.
  • the determination period ⁇ DET2 may be inserted at the end of the power electronic device 200.
  • the initial value of the DC link voltage V DC is a high voltage after boosting.
  • FIG. 6 is a block diagram showing a power electronic device 300 according to a modification.
  • DC power supply 302 includes a converter that generates DC link voltage V DC at DC link 304.
  • Inrush current prevention circuit 310 is provided between DC power supply 302 and smoothing capacitor 320.
  • inrush current prevention circuit 310 includes a resistor R2 and switches MC2 and RY2.
  • the load drive device 330 drives a load 306 such as a motor based on the DC voltage generated in the smoothing capacitor 320.
  • the controller 340 controls the switches MC2 and RY2 and the load driver 330 to detect an abnormality in the switches MC2 and RY2.
  • the same method as the first to fourth embodiments described above can be adopted.
  • V E of the above description and FIG. 4 read as V DC may be read as a V DC and V IN.
  • a switch off command is given to the switches MC2 and RY2 during the determination period ⁇ DET2 to operate the load driving device 330, and the change in the voltage V IN or the current I 1 at that time is performed. It is sufficient to detect the change.
  • Power electronics devices applied to industrial machines, construction machines, and transport vehicles may be started in response to the start of industrial machines, construction machines, and transport vehicles, and at startup, the voltage of the capacitor is 0 V, and power electronics The device may charge the capacitor after startup.
  • a switch with an auxiliary contact and a redundant switch RY2 are applicable. It is understood that the effects of simple configuration, size reduction, cost reduction and the like become even more remarkable if there are no power electronic devices.
  • the application of the power electronic device is not particularly limited, for example, industrial machines such as injection molding machines and presses, construction machines such as shovels and cranes, and transport vehicles such as forklifts and unmanned transport vehicles It is applicable to a machine etc.).
  • FIG. 7A and 7B are a schematic front view and a schematic side view, respectively, of a crane system according to the present embodiment.
  • a plurality of columns 40 support the girder 41.
  • the pillar 40 and the girder 41 constitute a portal frame.
  • a wheel 42 is attached to the lower end of the pillar 40, and a portal frame travels along the rail 43.
  • the direction perpendicular to the paper surface of FIG. 4A and the left and right direction of FIG. 4B correspond to the traveling direction.
  • a trolley 45 is mounted on the girder 41.
  • a hoisting machine 46 is mounted on the trolley 45.
  • a portal-type frame and a wheel 42 constitute a main body, and a trolley 45, a hoist 46 and a suspension work part (a hanger 47 and a wire) constitute a work part.
  • a plurality of electric actuators drive the respective operating units.
  • the traveling motor 51 mounted on the portal frame drives the wheels 42.
  • a traverse motor 52 mounted on the trolley 45 moves the trolley 45 in the transverse direction.
  • the horizontal direction of FIG. 4A and the direction perpendicular to the paper surface of FIG. 4B correspond to the transverse direction.
  • the hoisting machine 46 includes a hoisting motor 53, and winds up and unwinds a wire to which a hanging tool 47 such as a hook is attached at its tip.
  • the electric actuators such as the hoisting motor 53, the traversing motor 52, and the traveling motor 51 operate the hanger 47, the trolley 45, and the wheel 42, respectively.
  • AC power supply 60 An AC power supply 60, a power converter (DC-DC converter) 65, a power storage device 67, and a power converter (DC-DC converter) 68 are mounted on the portal frame.
  • AC power supply 60 includes an engine 61 and a generator 62.
  • the AC power supply 60 supplies driving power to the winding motor 53, the traverse motor 52, and the traveling motor 51. Further, power storage device 67 is charged by the power supplied from AC power supply 60.
  • the power conversion device 68 and the storage device (storage device) 67 are attached to the DC bus 70 (DC bus) as a storage system (power electronics device) 90. It can also be retrofitted to a crane not equipped with such a storage system (power electronics device) 90.
  • FIG. 8 is a power system diagram of the crane system.
  • An AC power supply 60 is connected to the DC bus 70 via a rectifier 63 and a power converter 65.
  • the power converter 65 converts the DC power output from the AC power source 60 and rectified by the rectifier 63 into DC power of a target voltage and supplies the DC power to the DC bus 70.
  • a smoothing capacitor 72 is connected between the positive bus 70P and the negative bus 70N of the DC bus 70.
  • Power storage device 67 is connected to DC bus 70 via power conversion device 68.
  • Power converter 68 controls charge and discharge of power storage device 67.
  • power conversion device 68 boosts the output voltage of power storage device 67 and supplies power from power storage device 67 to DC bus 70.
  • power conversion device 68 steps down the voltage of DC bus 70 and supplies power from power bus 70 to power storage device 67.
  • a traveling motor 51 is connected to the DC bus 70 via an inverter 54 and a power converter (DC-DC converter) 57.
  • a transverse motor 52 is connected to the DC bus 70 via an inverter 55 and a power converter (DC-DC converter) 58.
  • a hoisting motor 53 is connected to the DC bus 70 via an inverter 56 and a power converter (DC-DC converter) 59.
  • Power converters 57, 58, 59 respectively boost the voltage of DC bus 70, and supply the boosted power to inverters 54, 55, 56.
  • the controller 80 controls the power conversion devices 57, 58, 59, 65, 68, and the inverters 54, 55, 56 so that power is supplied from the DC bus 70 to the traveling motor 51, the traverse motor 52, and the winding motor 53. Supply.
  • the controller 80 controls the power conversion devices 57, 58, 59, 65 and 68 to maintain the voltage of the DC bus 70 at a preset target value.
  • the controller 80 controls the inverter 56 and the power conversion device 59 to step down the regenerative power generated by the hoisting motor 53 and supply it to the DC bus 70. Power storage device 67 can be charged by this regenerative power.
  • a rush current prevention circuit 76A is provided between power conversion device 68 and power storage device 67.
  • the controller 80 has a function of diagnosing an abnormality of the storage system 90 at the start or end of the crane.
  • the crane system is triggered by a trigger operation.
  • the activation operation may be configured by activation means such as an activation button or activation key.
  • the start operation can be performed by the operator in the cab.
  • the activation means may be provided in a control room (administration room) that remotely controls the crane, or may be provided in a remote control means available outside the driver's cab.
  • the crane may be terminated using a termination operation to the starting means as a trigger, or may be provided with a dedicated button (termination means) separately.
  • the abnormality of the storage system to be diagnosed is not particularly limited, but may be, for example, an abnormality (internal resistance abnormality, deterioration abnormality, temperature abnormality, voltage abnormality) of the storage means (battery or capacitor, or a combination thereof) It may include means (switches) or resistance or capacitor abnormalities.
  • an abnormality internal resistance abnormality, deterioration abnormality, temperature abnormality, voltage abnormality
  • the storage means battery or capacitor, or a combination thereof
  • It may include means (switches) or resistance or capacitor abnormalities.
  • the crane system further includes an abnormality notification unit 92.
  • the abnormality notification unit 92 detects an abnormality at startup and notifies the presence of an abnormality, or detects an abnormality at end and notifies an existence of an abnormality.
  • the abnormality notification unit 92 is a notification unit provided to the remote control unit in the case of remote control, and is a notification unit provided in the management building via the communication unit in the case of automatic operation, in the case of a manual operation. An alarm is provided in the driver's cabin to notify of an abnormality.
  • the abnormality notification unit 92 can change the notification content according to the type of abnormality or the degree of urgency. For example, in the case of an abnormality at a level at which work is restricted, a predetermined first level abnormality is notified, and replacement or maintenance is recommended, but at a level at which an operation is not restricted, a first abnormality is generated. The second level abnormality lower than the level may be notified.
  • the crane may start the operation in the operation mode not using the storage system 90 by a predetermined mode change operation in a state where it is determined that an abnormality has occurred and notification of an abnormality or operation restriction has been made. .
  • a predetermined mode change operation in a state where it is determined that an abnormality has occurred and notification of an abnormality or operation restriction has been made.
  • at least one of the traveling speed and the operating speed of the hanging portion may be limited.
  • the crane system of FIG. 8 and the power electronics device 300 of FIG. 3 can be associated as follows. 8 and FIG. Controller 80 Controller 240, gate driver 232 Power storage device 67 DC power supply 202 Inrush current prevention circuit 76 A Inrush current prevention circuit 210 Power converter 68 Converter 230 Smoothing capacitor 72 DC link capacitor 220 Positive side bus 70P DC link 204
  • One of the abnormalities monitored by the controller 80 may be deterioration or failure of the relay or the magnetic contactor of the inrush current prevention circuit 76A.
  • the controller 80 may detect deterioration or failure of the relay or the magnetic contactor by the method described with reference to FIGS. 3 and 4.
  • the present invention is applicable to industrial machines.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Control And Safety Of Cranes (AREA)
  • Dc-Dc Converters (AREA)

Abstract

La présente invention concerne un équipement électronique de puissance 200 comprenant un condensateur de liaison CC 220 et un circuit de prévention de courant d'appel 210. Un testeur 244 fournit une instruction de coupure ou une instruction de conduction à un commutateur RY1, MC1 pendant le test et détecte une anomalie dans le commutateur RY1, MC1 sur la base de la tension VDC du condensateur de liaison CC 220 ou du courant IIN s'écoulant vers le circuit de prévention de courant d'appel 210 à ce moment.
PCT/JP2018/038446 2017-12-21 2018-10-16 Grue et équipement électronique de puissance WO2019123800A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019560826A JP7272961B2 (ja) 2017-12-21 2018-10-16 クレーン
JP2023037707A JP7432033B2 (ja) 2017-12-21 2023-03-10 クレーン

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Application Number Priority Date Filing Date Title
JP2017-245331 2017-12-21
JP2017245331 2017-12-21

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WO2019123800A1 true WO2019123800A1 (fr) 2019-06-27

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