Magnetic integrated structure controllable reactor of transformer type（CRT） has the disadvantages of complex structure

high process fabrication requirements

and maintenance difficulties. In order to make up for the deficiencies in structural design

based on the magnetic integration technology

we proposed a new-type magnetic integrated CRT named double control winding basic unit magnetic integrated CRT. Ignoring the leakage reactance and resistance of winding

we established an equivalent magnetic circuit model and the equivalent circuit model of double control winding basic unit magnetic integrated CRT. Thereby

we quantitatively analyed the flux and current

thus deriving corresponding calculation formulas. Then

the magnetic field distribution in the core and the winding current at different loads were simulated by the finite element method（FEM） of field-circuit coupling. Finally the control winding capacity utilization was calculated. The results show that

while meeting the basic design principles of high impedance and weak coupling

double control winding basic unit integrated magnetic CRT can realize the smooth adjustment from non-load to full load

improve the capacity utilization rate of winding

reduce the number of independent basic units

and simplify the structure of magnetic integrated CRT.