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Motor driving apparatus for forklift truck and forklift truck using motor driving apparatus

A technology of motor drive and motor, applied in the field of motor drive devices for forklift trucks, can solve problems such as inability to climb, take time, and inability to accelerate, and achieve the effect of reducing power consumption

Inactive Publication Date: 2013-10-23
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, in order to reduce the power consumption of the motor and the power conversion device, if the output of the power conversion device that drives each motor is uniformly limited without distinguishing the traveling motor, the hoisting motor,

Method used

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  • Motor driving apparatus for forklift truck and forklift truck using motor driving apparatus
  • Motor driving apparatus for forklift truck and forklift truck using motor driving apparatus
  • Motor driving apparatus for forklift truck and forklift truck using motor driving apparatus

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Embodiment Construction

[0028] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The same or equivalent constituent elements, members, and processes shown in the drawings are given the same symbols, and overlapping descriptions are appropriately omitted. In addition, the embodiment is only an example and does not limit the invention, and all the features described in the embodiment and combinations thereof do not necessarily constitute the essence of the present invention.

[0029] In this specification, "a state where part A is connected to part B" includes not only the case where part A and part B are physically directly connected, but also the case where part A and part B are indirectly connected via other parts, which are not will have a substantial influence on the state of their electrical connection or will not impair the actions and effects exerted by their combination.

[0030] Likewise, "a state where part C is installed between p...

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Abstract

The invention provides a motor driving apparatus which can inhibit decrease of operation feelings and have reduced electric power consumption, and a forklift truck using the motor driving apparatus. The motor driving apparatus (300) drives multiple motors loaded on the forklift truck (600). Multiple electric power transformation apparatuses (100, 102, 104) are respectively arranged according to the motors (M1, M2, M3) to supply power to corresponding motors. An output limit part (302) gives priority the multiple motors (M1 to M3) so as to limit the output of the electric power transformation apparatuses which supply electric power to the motors (M1 to M3) with low priority.

Description

technical field [0001] The present invention relates to a motor drive device for a forklift. Background technique [0002] As one of industrial vehicles, there is an electric forklift that uses batteries as a power source. Electric forklifts (hereinafter referred to simply as forklifts) have: a driving motor that transmits power to the front wheels as the driving wheels (drive wheels); and a hydraulic pump that controls the steering angle (steering angle) of the steering wheels, that is, the rear wheels The hydraulic drive motor (steering motor); the hydraulic drive motor (lifting motor) that transmits power to the hydraulic pump that controls the lifting body; and the power conversion device that drives the traveling motor, steering motor, and lifting motor respectively. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2001-113989 [0004] The battery has a limited capacity and is required to enable the forklift to operate for a long time. In order to achieve lo...

Claims

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Application Information

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IPC IPC(8): B62D5/04B62D5/06B60K17/12B60K17/10B66F9/22
Inventor 田坂泰久鹰箸胜彦菅恭正久保孝平
Owner SUMITOMO HEAVY IND LTD