• Proceedings of the KIPE Conference
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• 2004.07a
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• pp.231-234
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• 2004

This paper is to research about design and drive system of a switched reluctance motor for a pallet truck application. SRM is suitable for a pulse type source and is researched for home and industrial applications owing to the advance of power electronics technology. An SRM for a pallet truck drive is developed and tested. The drive system has to operate with low voltage and high current. The small size, robustness and high efficiency make it possible to replace with DC motor which is used in a pallet truck conventionally. Test results show that pallet truck with SRM has better drive characteristics than that of the DC motor.

• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.1
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• pp.25-29
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• 2004

This paper is to research about design and drive system of a switched reluctance motor for a pallet truck application. SRM is suitable for a pulse type source and is researched for home and industrial applications owing to the advance of power electronics technology. An SRM for a pallet truck drive is developed and tested. The drive system has to operate with low voltage and high current. The small size, robustness and high efficiency make it possible to replace with DC motor which is used in a pallet truck conventionally. Test results show that pallet truck with SRM has better drive characteristics than that of the DC motor performance.

• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.844-847
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• 2003

The environmental problem and the drain of petroleum fuel resources has been became the center of public interest. So the electric drive attracts public attention. The vehicles for indoor works should not pollute air. Therefore it is also useful that applying electric drive to such an appliance. An 1.2[kw] SRM for a pallet truck drive is developed and tested. The drive system has to operate with low voltage and high current. The small size, robustness, high efficiency make it possible to replace with DC motor. Test results show that pallet truck with SRM has better characteristics than that of the DC motor performance.

• Proceedings of the KIEE Conference
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• 2000.07b
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• pp.732-734
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• 2000

An 1.2[kw] SRM for a pallet truck drive is developed and tested. The drive system has to operate with low voltage and high current. and has to have the characteristics of DC series motor. The small size, ruggedness, high efficiency make it possible to replace with DC motor. Test results show that pallet truck with SRM has better characteristics than that of the DC motor performance.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.55-57
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• 2002

In industry, A pallet truck is drived mainly by d.c motor, because it use to battery for input power. However, d.c motor has a brush, this is the disadvantage of the d.c motor for a pallet truck. Though a brushless d.c motor has a permanent magnet, it is for low torque. Switched reluctance motors(SRM) have the advantage a high torque/weight ratio, as the large reluctance torque is made by salient poles of both start and rotor, and a high reliability, this paper design the shape of the switched reluctance motor that will replace a d.c motor for A pallet truck. First of all, designed parameter of SRM, outer diameter, diameter of rotor and stock length, from the outputr equation considering electric loading and magnetic loading. Next, design diameter of stator and rotor, depth of slot pole width, air gap as inner size of motor. The design of SRM certify the torque, the efficiency and the output power by a simulation.

• Journal of the military operations research society of Korea
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• v.35 no.2
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• pp.87-98
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• 2009

In the military logistics, the Outsourcing such as 3PL (3rd Party Logistics) and 4PL has emerged recently as an important agenda. However, when 3PL applied prematurely, side effects will occur such as the loss of combat power in wartime, the security vulnerabilities and the high cost by a small amount of military order. Recently, the developed countries such as the United States and the Britain want to compensate for these side effects. Therefore, They are developing the private-public competitive sourcing concept for the complementary partnership and the foster competition with the private sector. To apply this concept to the Korean Military, they need to be reorganized and promote the efficiency in the military logistics. Especially, the transportation sector. Therefore, this study, which is focused on the transportation sector, offers two kinds of measures to improve such as the Dual Pallet Standard (T11, T12) and the PLS(Palletized Loading System) truck system. Finally, these improvements will be analyzed by the simulation in this paper.

• Food Science and Preservation
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• v.24 no.7
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• pp.915-922
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• 2017

This study aimed in onion production by evaluating cost and labor efficiencies of onion storage methods using either a ton-bag or a wire-steel pallet. New methods using ton-bag and wire-steel pallets were developed and applied to postharvest tasks, such as harvest packaging, transportation, and storage. The storage parameters evaluated for their effect on the logistics of onion production were: working duration, working hours, and cost expenditure. The longitudinal tensile strength of the ton-bag developed in this study was 16% higher than that of the conventional ton-bag. The wire-steel pallet developed in this study had 10% more storage capacity in a low-temperature storage room, and its truck loading capacity was more than doubled compared to that of the conventional steel pallet. There was no difference in the wasting rate during bulk storage between the newly developed wire-steel pallet and the conventional steel pallet, for 500 kg of onions. However, the bulk storage of 1,000 kg of onions using the wire-steel pallet was not found to be suitable, because the wasting rate of onions stored using the wire-pallet was 3.7% higher than that of onions stored using a conventional steel pallet. The time and the total investing costs for the bulk method decreased by 50.1% and 46.1%, respectively, compared to those for conventional harvest. In the bulk storage using the wire-steel pallet, the total storage cost decreased by 28.8%. Thus, it is estimated that we could have saved 18.3 billion won if the wire-steel pallet method about 30% of the total onion production (1,298,749 M/T) in 2016.

• Journal of the Semiconductor & Display Technology
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• v.22 no.3
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• pp.36-40
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• 2023

Recently, in the problem of multi-order processing in logistics warehouses, multi-pickup systems are changing from the form in which workers walk around the warehouse to the form in which goods come to workers. These changes are shortening the time to process multiple orders and increasing production. This study considered the sequence problem of which warehouse the items to be loaded on each truck come first and which items to be loaded first when loading multiple pallet-unit goods on multiple trucks in an industrial smart logistics automation warehouse. To solve this problem efficiently, we use the mutant algorithm, which combines the GA algorithm and ACO algorithm, and compare with original system.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.8 no.2
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• pp.1-5
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• 2002

In order to improve the load efficiency of pallets and trucks for agricultural products, various transport package sizes have been analyzed by modular coordination process. From the results, the load efficiency on pallet was 99.8 percent when size was 550 by 366 mm and 366 by 275 mm. Load efficiency of standard pallet(1100 by 1100mm) was 93.6% for truck with 11 tons load capacity while as low as 41.1% for 2.5 ton trucks. Like any other products, this study proved that trucks with more than 8 tons of capacity were highly recommended for transportation of agricultural products.

• Journal of Korean Society of Transportation
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• v.27 no.1
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• pp.97-105
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• 2009

It is expected that logistics standardization have an great effect on industry and national economy due to cost saving and improving efficiency. Therefore all countries of the world make a strenuous effort to take a lead of logistics standardization Despite such efforts of every country, our country remained a lukewarm attitude about logistics standardization. Especially, our country remained a lukewarm attitude about logistics standardization effect quantify. We have to suggest the necessity of standardization and the effect for carrying out logistics standard. So, this study performed literature review and case study for development of effect valuation method. Also, this study developed effect valuation standard for quantifiable standardization effect and drew the effect valuation standard model. First, the measure of preliminary effectiveness was chosen for MOE selection. As a results, vehicle load ratio, delivery cost, keeping space efficiency warehouse automation ratio, etc. were selected. Then, vehicle/truck load ratio, warehouse keeping efficiency, up unloading hour, packaging cost, consistency transportation ratio were chosen for MOE of pallet standardization.