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CN-122001059-A - Energy supply device for crane system

CN122001059ACN 122001059 ACN122001059 ACN 122001059ACN-122001059-A

Abstract

The invention relates to an energy supply device for a crane system, wherein the voltage is up-converted in a first converter (23) for transmitting more power at or before a rope length sensor (21) and is back-converted again in a second converter (22) for loading at or near the end of a cable (20), at or near the top end (6) of the crane (1).

Inventors

  • Rivolard Petar Golubovic
  • MARTIN WEISS

Assignees

  • 威卡亚力山大维甘德欧洲两合公司

Dates

Publication Date
20260508
Application Date
20251105
Priority Date
20241108

Claims (15)

  1. 1. An energy supply device for a crane system, comprising a mobile crane (1) with a chassis (2) on which a telescopic boom (3) is supported, a carrier cable (4) being guided through the boom (3), which carrier cable can be wound in a reel (5) at a first rope end, Wherein the carrying cable (4) is guided past the top end (6) of the boom (3) and provided with a hook (7) at the second rope end, with which the load (8) can be lifted, Wherein at least one load, in particular a lamp, winch and/or drive (12), is fixed at or near the top end (6) of the boom (3), and Wherein, in order for the energy supply cable (20) of the at least one load to be guided along the boom (3), it can be wound in a rope length sensor (21), It is characterized in that the method comprises the steps of, The voltage may be converted to a first voltage value in a first converter (23) at or before the rope length sensor (21) for transmitting electric power, and the voltage may be converted to a second voltage value in a second converter (22) at the end of the cable (20), at or near the top end (6) of the boom (3) for voltage supply of the load, wherein the first voltage value is higher than the second voltage value.
  2. 2. The energy supply device for a crane system according to claim 1, wherein the first voltage value corresponds to a multiple, in particular twice, of the second voltage value.
  3. 3. Energy supply device for a crane system according to claim 1 or 2, wherein the first and/or second converter (23, 22) is a DCDC converter and provides 30A,60A or 80A of current.
  4. 4. Energy supply device for a crane system according to any one of the preceding claims, wherein the cable (20) comprises at least two wires electrically isolated from each other, wherein the wires each have a cross-sectional area of 0.2mm 2 to 1.5mm 2 , in particular 0.5mm 2 and extend over a length of at least 50 m.
  5. 5. Energy supply device for a crane system according to any one of the preceding claims, wherein the voltage is converted as a direct voltage or an alternating voltage from a voltage value of 12V or 24V to a voltage value of 48V or 48v±5V.
  6. 6. Energy supply device for a crane system according to claim 1 or 2, wherein a movable folding arm (10) is supported at the end of the crane arm (3) in the vicinity of the top end (6), which can be tilted and/or turned in two positions (a) or (B) or between them by means of an electric drive (12), preferably a motor with a transmission.
  7. 7. Energy supply device for a crane system according to claim 1 or 6, wherein a further load, in particular a lamp, a winch, a headlight, a movable headlight, a camera, a movable camera, a force sensor, a pressure sensor, a linear actuator or other winch motor is arranged on the movable folding arm (10) and is supplied with energy or is operated.
  8. 8. Energy supply device for a crane system according to any one of the preceding claims, wherein the cable (20) has a plurality of wires isolated from each other, wherein at least two wires are provided for the energy supply of the load, wherein at least one further wire is provided for the data transmission of measurement data of the load.
  9. 9. Method for energy supply of a crane system, comprising a mobile crane (1) with a chassis (2) on which a telescopic boom (3) is supported, through which a load-carrying cable (4) is guided, which load-carrying cable can be wound in a reel (5) at a first rope end, Wherein the carrying cable (4) is guided past the top end (6) of the boom (3) and provided with a hook (7) at the second rope end, with which the load (8) can be lifted, Wherein at least one load, in particular a lamp, winch and/or drive (12), is fixed at or near the top end (6) of the boom (3), and Wherein, in order for the energy supply cable (20) of the at least one load to be guided along the boom (3), it can be wound in a rope length sensor (21), It is characterized in that the method comprises the steps of, In order to transmit an electric power voltage is converted in a first converter (23) at or before the rope length sensor (21) to a first voltage value, and the voltage is converted in a second converter (22) at or near the end of the cable (20), at or near the top end (6) of the boom (3) for voltage supply of the load to a second voltage value, wherein the first voltage value is higher than the second voltage value.
  10. 10. Method for energy supply of a crane system according to claim 9, wherein the first voltage value corresponds to a multiple, in particular twice, of the second voltage value.
  11. 11. Method for energy supply of a crane system according to any of claims 9 to 10, wherein the voltage is converted as a direct voltage or alternating voltage from a voltage value of 12V or 24V to a voltage value of 48V or 48V +/-5V.
  12. 12. Method for energy supply of a crane system according to any one of claims 9 to 11, wherein the first and/or second converter (23, 22) is a DCDC converter, from which a current of 30A, 60A or 80A is provided.
  13. 13. Method for energy supply of a crane system according to any one of claims 9 to 12, wherein pulse width modulation is performed for voltage conversion and/or for conversion.
  14. 14. Method for energy supply of a crane system according to any one of claims 9 to 13, wherein a short circuit or an earth fault in the cable (20) or a resistance deviation with respect to the mobile crane (1) or crane boom (3) is monitored via a monitoring unit and an alarm or disconnection unit is activated in case of detection.
  15. 15. Method for the commissioning of a crane system with an energy supply according to any one of claims 1 to 8, wherein the load or additional components coupled to the crane boom (3) at each commissioning via the cable (20) are queried in turn in the case of a network security check, wherein the load or additional components are compared in digital form with a check code stored in a central control device and are only provided with the actual load current via the cable (20) or are then authorized for use after a successful network security check.

Description

Energy supply device for crane system Technical Field The invention relates to an energy supply device for a crane system with a voltage converter, to a method for supplying energy for a crane system, and to a method for operating a crane system. The invention relates in particular to an energy supply device for crane systems, so-called "High Power Cable Reel (high-power cable reel)". Background Mobile cranes with flexible cables are known from the prior art, which cables (wound onto reels) supply the crane parts with a vehicle voltage even when the crane parts are moved relative to each other and thus vary in their relative length, or when the crane parts are moved. The power transmission limit is derived from the cable cross section used and the known compliance, according to which the transmissible electric power coincides with the product of voltage and current strength (p=u xI). German patent application DE 20 2013 010 381 U1 is known from the patent application. The object of the utility model is a drive for a sliding link of a locking system of a telescopic system. Furthermore, DE 10 2016 007 053 A1 discloses a mobile crane with a telescopic boom and a luffing boom. The energy supply of the luffing jib can be provided by the mobile crane via a supply line of variable length, wherein the supply line is accommodated by a reel fitted on the telescopic jib. WO 2012/133657A1 furthermore discloses a crane arrangement with a PWM converter. The PWM converter switches the alternating current supplied from the bus bar through the PWM control device so as to convert the alternating current into direct current, thereby reducing a phase difference between the voltage and the current of the alternating current. Furthermore, WO 93/18566A1 discloses a method for economically transmitting low-power electrical energy over a large distance, wherein the energy is transmitted in a single phase by means of a transmission voltage with a lower transmission frequency than zero. Finally, DE 102016009987A1 describes a method for current supply in a current distribution system in the small-voltage domain below 25 volts AC or 60 volts DC, in which at least one power supply component and two or more voltage converters for supplying at least two possible current loads are used. A corresponding current distribution system and associated device are also disclosed. It may sometimes be considered disadvantageous at the systems known from the prior art that in the case of an on-board network using a mobile crane only a limited voltage is available for the supply of the load. Furthermore, almost unavoidable power losses in the case of long cable paths to be bridged may be considered disadvantageous. Disclosure of Invention A primary object of the present invention is to provide an energy supply device for loads on mobile cranes with particularly high power requirements over long distance sections. Furthermore, a structure for flexible power supply of crane components with a position displacement should be created. These objects are achieved with the object of the independent claims. Advantageous refinements of the invention are characterized in the respective subclaims. An energy supply device for a crane system comprises a mobile crane with a chassis on which a telescopic boom is supported, through which a load cable is guided. The carrier cable may be wound into a spool at the first rope end. Furthermore, the load carrying cable is guided past the top end of the boom and is provided with a hook at the second rope end, with which the load can be lifted. At least one load is arranged, in particular fixed, at or near the tip of the boom. The at least one load may in particular be an electrical load, such as a lamp, winch and/or a drive. For the energy supply of at least one load provided via the energy supply of the on-board network or the crane system, a cable is guided along the telescopic boom, which cable can be wound in the rope length sensor. The telescopic boom may for example comprise a plurality of telescopic sections and each section is embodied as a quadrangular hollow profile or as a hollow box profile. The cable carrying the cable and the cable length sensor may be guided along the telescopic boom in its longitudinal direction. The cable carrying the cable and the cable length sensor can be guided externally on the boom. In a particularly advantageous embodiment, it can be provided that the cable carrying the cable and/or the cable length sensor is guided in particular likewise in the hollow profile of the jib. The carrying cable, however also in particular the cable of the cable length sensor, can thus be effectively protected from damage, contamination or the like. A first function of the rope length sensor may be, for example, to determine the length of the boom. A spool for the cable winding may be provided in the housing of the cable length sensor. A length of cable of a size of at least the maximum length of the boom m