Ventilation improvement device for brushless exciter of synchronous motor

The utility model discloses a ventilation improvement device for a brushless exciter of a synchronous motor. The brushless exciter is an alternating current exciter with an exciter and a rotary rectifier coaxial with the synchronous motor. The ventilation improvement device comprises an exciter main shaft (1), a bearing (12), an exciter stator (5), an exciter rotor (3), a rotary rectification disk (2), a stator machine seat (4) and an exciter cover (6), wherein the rotary rectification disk and the exciter rotor are arranged on the exciter main shaft; the exciter stator is arranged on the stator machine seat; the exciter cover is provided with an exciter air inlet (7) and an exciter air outlet (8); a front air inlet (10) and a rear air inlet (9) are formed at two ends of the stator machine seat; an air outlet is formed on the upper part of the stator machine seat; and the exciter air outlet is connected with an air outlet (11) formed on the upper part of the stator machine seat. The ventilation improvement de