• 
• 
                                                 A few arguments about CCAW

Expession method of model

 

Expession method of ccaw model

 

CCA - 15H - Φ0.08

 

CCA=Copper Clad Aluminum

 

15H=the copper layer volume ratio of 15(copper clad aluminum only the 10H&15H at

 

present)

 

Φ0.08=nominal diameter

 

Expression method of ccaw model

 

CCAW=Copper Clad Aluminum Wire

 

2EI/AIW=polyester(imide)overcoated with polymideimide enameled wire

 

 (UEW=polyester enameled copper wire)

 

 Φ0.08=nominal diameter

 

Point 1

 

When the DC resistance under the same conditions, the weighth of CCAW is QAW

 

(copper wire) half.

 

Evidence 1: DC resistance of CCAW 1.5times bigger than QAW. In other words.

 

When DC resistance under the same  conditions, the volume of CCAW must be bigger 1.5

 

times than QAW

 

Evidence 2: the density of CCAW is QAW 1/3

 

These two enidences determine the point 1

 

The extension of point 1

 

Under the same conditions of CCAW'S length, transformer core or number of turns,

 

The wire diameter of CCAW is thicker 1.225 times than QAW

 

Point 2：

 

In the use of high frequency state, if we want to make the same effort, wo can keep the wire

 

diamter of CCAW be thinner 1.225 times than QAW, or even we can keep the sectional area

 

unchange

 

We changed the wire piles from single to double or several, this approach base on the high

 

frequency current skin-effect

 

That is: when the alternating  current pass through the conductor, the induction effect  can

 

cause an uneven ditribution of current  the closer to the conductor surface , the density is

 

more higher. This phenomennon is called "skin effect"

 

When the high frequency current pass through the conductor,we can think the current only

 

pass through the thinner layer of the wire surfance

 

this is the same effect with the way of reducing the  sectional area , increasing the resistance.

 

In the case  of hardly pass through the central part ,we can get rid of this part in theory to

 

save the cost we really have changed the material from copper to aluminum. The effect should

 

be better than before 

 

 tha is to say: we only need thicker the wire ,  no need to insist on the view of  1.225tims

 

between CCAW & QAW

 

Even  , we can make sure that under the conditions of unchanged sectional area , we change

 

the wire from single pile to double or several 

 

Point 3

 

copper density 8.9G/cm3,  AL density 2.7G/cm3, if the volume ratio between copper and

 

ccaw is 15%

 

then the weighth ratio =(8.9*0.10)/（2.7*0.9）=0.366  =2.679/7.321

 

he density ratio=（2.7*0.9+8.9*0.1）/8.9=0.373≈1/3

 

point 4

 

In the case of CCAW's unit pirce is same with QAW, we also can save the cost 50%

 

because the standard weigth can reduce 50% or above during using the CCAW 

 

In one word, because of these above reasons , to promote the use of CCAW will have great

 

benefits in all directions