Generator excitation current of several ways

1, dc generator excitation power supply: this way of excitation generator has a dedicated dc generator, the dedicated dc generator said For the dc exciter, exciter is general and coaxial generators, generator exciting winding through perfectly on the large axial slip ring and fixed brush from the exciter Dc current. This way of electric vehicle motor field independent excitation current, more reliable and decrease for electricity consumption, etc, is in the past few decades Generator main excitation mode and has a mature operating experience. Defect is excitation regulating speed slower, maintenance workload is big, so in more than 10 mw The crew are rarely used. 2, ac exciter power supply mode of excitation, some use ac exciter provides modern large capacity generator excitation current. Ac exciter Installed on the generator shaft, its output of alternating current flows through the rectifier supply generator rotor excitation, at this point, the generator excitation way his wound Magnetic way, and with the stillness of wholesalemotor.blogspot.com the rectifying device, so it is also called separately excited static excitation, exchange exciter provides exciting current. Deputy excitation communication Magnetic machine can be permanent magnet machine with self-excitation constant pressure device or alternator. In order to improve the excitation regulating speed, ac exciter is usually adopted 100-200 hz frequency generator and the ac exciter are using 400-500 hz frequency generator. The motor fan dc excitation winding of generator Group and the three-phase ac winding around the stator slot, the rotor teeth and slots without winding, like a gear, therefore, it has no brush and slip ring Turn the contact parts, with reliable work, simple structure, convenient manufacturing process. The disadvantage is that the noise is bigger, ac voltage harmonic Component is bigger also.