The world's fourth largest steel industry player Pohang's business into the LED

According to Korean media KoreaHerald, PCOSICT, a engineering and information services company of Posco Steel (POSCO), the world's fourth largest steel producer, plans to enter the LED market. POSCO merged its two subsidiaries, POSDATA and POSCON, in January to establish POSCOICT, which holds 72.54% of the shares.
POSCOICT executives said that the company should not be directly involved in LED manufacturing, and a more detailed plan is expected to be finalized in the second half of 2010. Since smart buildings require energy-saving systems, the LED business will be more effective than other companies in the company. Posco Steel invested in LED manufacturer Seoul Semiconductor in December 2009, holding 1% of its equity.
Although POSCOIC executives said that the plan to enter the LED business is not directly related to POSCO, Posco Steel is very interested in the green business. In February, Posco Steel said it will invest 7 trillion won (about 6.3 billion U.S. dollars) in green business by 2018, hoping that 10% of its revenue comes from green-related businesses.


Advantages of Permanent Magnet DC Motor or PMDC Motor

PMDC motor have some advantages over other types of DC motors. They are :
    1. No need of field excitation arrangement.
    2. No input power in consumed for excitation which improve efficiency of DC motor.
    3. No field coil hence space for field coil is saved which reduces the overall size of the motor.
    4. Cheaper and economical for fractional kW rated applications.

Disadvantages of Permanent Magnet DC Motor or PMDC Motor

    1. In this case, the armature reaction of DC motor cannot be compensated hence the magnetic strength of the field may get weak due to demagnetizing effect armature reaction.
    2. There is also a chance of getting the poles permanently demagnetized (partial) due to excessive armature current during starting, reversal and overloading condition of the motor.
    3. Another major disadvantage of PMDC motor is that, the field in the air gap is fixed and limited and it cannot be controlled externally. Therefore, very efficient speed control of DC motor in this type of motor is difficult.
Dc Spur Gear Motor including a dc motor and a spur gearbox.


A spur gearbox could be either square type or round type as following:

square dc spur gear motor
round dc spur gear motor

According to the size of the gearbox, normally we have 12mm DC Spur Gear Motor, 25mm DC Spur Gear Motor, and 37Mm Dc Spur Gear Motor and so on.
12mm dc spur gear motor
25mm dc spur gear motor37mm dc spur gear motor
DC Spur Gear Motor are relative simple in production, so the output efficiency is limited. According to the stages of the gear trains, the efficiency reduce one by one. However, the price would be a bit cheaper than other types DC Gear Motor . 


DC Spur Gear Motor

Dc Spur Gear Motor,Spur Gearhead Dc Motor,Gear Spur Dc Motor,High Torque Dc Spur Gear Motor

SHENZHEN DONGMING MOTOR CO., LTD. , http://www.dongminggp.com