Double-salient electrical machine (DSEM) is a new type of AC brushless machine. It has advantages of simple structure, high reliability and easy maintenance, As a generator, its voltage is easily be controlled and de-excited in the fault. All of these characteristics give DSEM its unique advantage in the application to non-grid-connected wind power generator system. A control theory of the double-salient electrical generator (DSEG) is introduced and the control law of the system is analyzed. This paper also provides a control method that realizes maximum power output and control parameters that increase the generator's resistance to load disturbances. Load characteristics of the system are examined through experiments on a prototype controlled by a digital regulator. Experimental results confirm that DSEG satisfies resistance to load disturbances after optimizing control parameters and thus meets the requirements of application to wind power generator system.