by and @2014ApJ...791...59K. Here we confirm this effect on the B-type model without meridional circulation. Note, that the increase of the dynamo period with increase of magnitude of dynamo generated magnetic field was reported earlier by for the dynamo model in the overshoot layer below the convection zone. In their case the dynamo wave propagate inward to the bottom of the overshoot layer, see Fig.4 (right) in . The similar is found in our study for the B-type model. This proves the generic character of this effect for this type of the large-scale dynamo. Figure 2 shows that in the B-type models the dynamo wave propagates to the bottom of the convection zone. Which is promoted by the diamagnetic pumping. The effect can be amplified in the model with the meridional circulation. The concentration of the dynamo wave to the bottom of the convection zone, where the magnetic diffusivity is low, is amplified for the fast rotating star. This enlarges the amplitude of the dynamo and the dynamo period as well. The certain set of the multiply meridional circulation cells can help to solve this issue . However, it is not clear if such a set of the meridional circulation 