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Hybrid construction machine

A construction machinery, hybrid technology, applied in the direction of mechanical equipment, hybrid vehicles, motor vehicles, etc., can solve the problem of unstable supply voltage, damage to the inverter, and inability to properly perform the electric operation and power generation operation of the auxiliary motor generator. and other problems to achieve the effect of improving reliability

Inactive Publication Date: 2011-10-05
SUMITOMO HEAVY IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a possibility that the supply voltage to electric working elements such as auxiliary motor generators and slewing motors may become unstable.
In addition, if a failure occurs in an electric operation element such as an auxiliary motor generator and a turning electric motor, or in a drive control system such as an inverter that drives these, the electric operation and power generation operation of the auxiliary motor generator cannot be properly performed. Or control of power running and regenerative running of electric motors for slewing
Potential for complete loss of motor generator or motor control at worst
[0010] Such problems also occur even when abnormalities occur in drive control systems such as electric operating elements other than auxiliary motor generators and slewing motors, or inverters that drive these electric operating elements.
[0011] In addition, in conventional hybrid construction machines, when an abnormality occurs in the drive control system such as the motor generator or the inverter as described above, if a huge amount of electric power is generated by the power generation operation of the auxiliary motor generator or the regenerative operation of the turning motor , there is a possibility of damaging the normal inverter without abnormality

Method used

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Embodiment Construction

[0076] Hereinafter, hybrid construction machines according to various embodiments of the present invention will be described with reference to the drawings.

[0077] figure 1 It is a side view of a hydraulic excavator that is an example of a hybrid construction machine according to a first embodiment of the present invention.

[0078] An upper revolving body 3 is mounted on an undercarriage 1 of a hydraulic excavator via a revolving mechanism 2 . Boom 4 , arm 5 , and bucket 6 , and boom cylinder 7 , arm cylinder 8 , and bucket cylinder 9 for hydraulically driving these are mounted on upper revolving body 3 . In addition, a driver's cab 10 having a driver's seat and a steering device, and a power source such as an engine are mounted on the undercarriage.

[0079] figure 2 is a block diagram showing the structure of the hydraulic excavator. figure 2 In , the mechanical power system is represented by a double line, the high-pressure hydraulic line is represented by a solid ...

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Abstract

A hybrid construction machine is provided with a motor-generator system connected to an internal combustion engine and performing electric power generation by a motor-generator, an electricity storage system connected to the motor-generator system, load drive systems connected to the electricity storage system and driven by electricity, abnormality detection sections provided to the motor-generator system, the electricity storage system, and the load drive systems, and a main control section for determining, on the basis of a value detected by the abnormality detection section, whether or not an abnormality has occurred. When the abnormality determination section determines that an abnormality has occurred, the main control section stops drive of a load drive system, among the load drive systems, in which the abnormality is detected.

Description

technical field [0001] The present invention relates to a hybrid type construction machine, which controls the power supply to a load and controls the supply of regenerative power obtained from the load to an accumulator. Background technique [0002] In recent years, hybrid construction machines in which a part of the drive mechanism is electrified have been proposed. Most of such construction machines include a hydraulic pump for hydraulically driving work elements such as a boom, an arm, and a bucket. Hydraulic pumps are usually driven by an engine. And, the motor generator is connected to the engine for driving the hydraulic pump through the reduction gear. The motor generator assists the driving of the engine, and charges the storage battery with electric power obtained by generating and operating the motor generator. [0003] A construction machine has been proposed that includes an electric motor in addition to a hydraulic motor as a power source for the slewing me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/26B60K6/485B60L3/00B60L11/14B60W10/08B60W20/00E02F9/20B60L50/15B60L50/16
CPCB60L1/003B60W10/30B60L3/0023B60W50/029B60W10/06Y02T10/70B60L11/187Y02T10/6217B60W20/00E02F9/2025Y02T10/6221B60L1/20E02F9/2246B60L2200/40B60K6/48Y02T10/6286B60W2510/242B60W10/08E02F9/26Y02T10/705B60L11/123Y02T10/7258B60Y2200/25E02F9/2075Y02T10/7077Y02T10/7005E02F9/123E02F9/2058B60L50/61B60L50/16B60L58/24Y02T10/62Y02T10/7072Y02T10/72B60W20/50B60K6/442B60W30/1886B60Y2200/412E02F9/2091F02D29/06
Inventor 吴春男神林英明高梨今日子
Owner SUMITOMO HEAVY IND LTD
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