Call the lightning component inside the lightning tab Salesforce.

Try this code:

<lightning:tabset>
 <lightning:tab tab1>
    <c:component_in_tab1 aura:id="tab1" />
 </lightning:tab>

 <lightning:tab tab2>
    <c:component_in_tab2 aura:id="tab2" />     
  </lightning:tab>
</lightning:tabset>