TZH brushless three-phase synchronous alternators / generators connect with the prime mover or the belt directly. It can be a movable or fixed small power station to serve spare supply for high building and it can be a lighting or motive power supply for the villages, town, working sites and pasture-land. This series alternators / generators are star connection with neutral point for three phase, rated wire voltage is 400V, phase voltage is 230V, frequency is 50Hz, power factor is from 1.0~0.8(lag). It is adopted reactance converting combined type excitation device, its technique is excellent than original alternators/generators, it is new construction, simple unique. It can get self-excitation constant voltage with no voltage auto regulator. It is easy in building voltage, its waveform distortion rate of voltage is low, its voltage regulating accuracy is high, voltage regulating is ≤±5% when its power factor is 1.0~0.8(lag). Its frequency change rate is not over rated frequency of 3% when its from 0→←100% ,(Its free load is 51.5Hz, full load is 50Hz)