Wherever B of Figure 1 and A and B of Figure 3 are located, this can be thought of as a condenser. So in order to calculate the capacity of electrostatic induction generator, the formula to calculate the capacity of condenser can directly be used. If B of Figure 1 is a stator, it is said to be a simple-system stator(Patent No. 8606) and if A and B of Figure 3 are stators, they are said to be plural-system stators(Patent applied for). But for the purpose of calculating the capacity, the simple system need not be distinguished from the plural system because both of them are the same. So by means of a easier simple system, B of Figure 1 which acts as a stator will be explained like Figure 5, and b and b' which act as rotors will be explained like Figure 6.


The effective area of rotor comes out by subtracting π r12and the area of insulated line(11) from πr22, while, as illustrated in Figure 5 and 6, the area of stator should be half as much as the area of rotor because it is half as much as the area of rotor. And if the number of rotor is n and then the capacity is calculated by the method to calculate the capacity of condenser, both sides might be considered to be 2n.

But because the effective area of stator is a half of the effective area of rotor, the calculation should be n. And also if the polar number(It will be explained later on.) of stator is E, the number of insulated line(11) is 2E(The number of insulated line is the same as the polar number of rotor.).

Thus, after the units are defined as follows,

① r2 [cm] - distance from the center of rotor to external length of circle

② r1[cm] - distance from the center of rotor to internal length of circle

③ d[cm]- distance of stator and rotor

④ n - the number of rotor

⑤ 2E - the number of insulated line

⑥ α[cm]- width of insulated line

the capacity will be calculated by using the formula to calculate the capacity of condenser which is

C = 1 × S [F]
9×1011 4πd
In that case, the effective area should first be obtained. If the whole area of a rotor is S2 and the ineffective area is S1, the effective area S is as follows.
          
S = S2 - S1


And,

          
S1 =  πr12 + 2E(r2 - r1) α

        
S2 =  πr22


So, the effective area of a rotor S is as follows.

         S = πr22 - {πr12+2E(r2 - r1)α}

           = πr22 - πr12 - 2E(r2 - r1)α

           = π(r22 - r 12)- 2E(r2 -r1)α

           = (r2 - r1){π(r2 +r1)- 2Eα }


And also, because the number of rotor is n, the whole effective area of rotors(S) is as follows.

         
nS=n(r2 - r1) {π(r2 + r1)- 2Eα }


Therefore, the formula to calculate the capacity of electrostatic induction generator is as follows.

C= 1 × n(r2 - r1){π(r2 + r1)- 2Eα } [F]
9×1011 4πd

 


(The Rotation Movement of Rotor and chare Poscharge of Electric Energy)