Voltage　stabilisation　is　indispensable　for　every　energy　converter,　including　a　wireless　power　transfer　system.　With　the　increase　of　frequency,　the　resistance　of　the　receiving　coil　would　turn　out　to　be　elevated　obviously,　which　would　lead　traditional　voltage　regulators　composed　by　a　buck-boost　converter　to　existing　an　unsteady　operation　region.　A　logical　control　scheme　is　proposed　to　overcome　this　obstacle,　which　could　self-adaptively　stabilise　the　output　voltage　without　the　course　of　feedback.　The　proposed　method　could　realise　the　function　of　voltage　stabilising　at　a　larger　range　of　distance　comparing　to　the　traditional　scheme　of　buck-boost　converter　with　the　same　conditions.　Two　improved　structures　are　built　based　on　the　proposed　scheme　to　prevent　buck-boost　converter　stepping　into　the　unsteady　region,　and　experiments　are　finally　implemented　to　verify　the　effectiveness　and　correctness　of　the　proposed　method.