Bir fazali va uch fazali quvvat manbalari uchun kommutatsiya quvvat manbaini loyihalash
PWM sxemasini tanlash
Maqolada UC3846 ikki tomonlama chiqish oqimi turi PWM kontroller IC tanlanadi. Ushbu sxema 20KHZ kommutatsiya chastotasida 50% * maksimal * ish aylanishiga ega, shuning uchun uni boshqarish samarali va barqaror.
IGBT drayveri va himoyasi
IGBT work is controlled by the positive and negative gate voltage, when UGE>0, IGBT yoqilgan, qachon UGE<0, (general UGS ≤ -5V), IGBT cut-off. Taking into account its characteristics and operating principle, the choice of positive and negative dual power supply M57962L-type special drive integrated circuit. The circuit has a built-in timing logic short-circuit protection circuit, and has a protection delay function. Driver protection principle circuit shown in Figure 3 (b). In addition to the IGBT drive circuit itself to provide short-circuit (overcurrent) protection, in parallel with the IGBT RC buffer branch and power supply parallel absorption capacitors on both sides of the method is also effective.
Xulosa
Ushbu kommutatsiya quvvat manbai amaliy ilovalar uchun ko'proq mos keladi. Rektifikator pallasida parametr konstruktsiyasi bir fazali mulohazalarga asoslanganligi sababli, uch fazali elektr ta'minotida foydalanilganda tizim yanada barqaror va ishonchli bo'lishi uchun etarli chegaraga ega; bir fazali elektr ta'minotida ishlatiladigan ham normal ishlashi mumkin. Bu elektr ta'minoti cheklovlari tufayli elektr ta'minotini almashtirishning ziddiyatini hal qiladi. Ushbu usul yordamida mavjud kommutatsiya quvvat manbai ham bir fazali, uch fazali kommutatsiya quvvat manbaiga aylantirilishi mumkin.
