描述
反应式步进电动机采用高导磁材料构成齿状转子和定子,其结构简单,生产成本低,步距角可以做的相当小,一般为三相,可实现大转矩输出,步进角一般为1.5度,但噪声和振动都很大。反应式步进电机的转子磁路由软磁材料制成,定子上有多相励磁绕组,利用磁导的变化产生转矩,但动态性能相对较差。
永磁式步进电机转子采用多磁极的圆筒形的永磁铁,在其外侧配置齿状定子。用转子和定子之间的吸引和排斥力产生转动,它的出力大,动态性能好,但步距角一般比较大。一般为两相,转矩和体积较小,步进角一般为7.5度或15度。
JACUZZI 9590969 55″ x 55″ OYSTER WHIRLPOOL BATH 160799
PORT-A-COOL PAC2K24HPVS PORTABLE EVAPORATIVE COOLING
SUNROC F110PM/F140PM WALL MOUNT DUAL WATER COOLER KIT
SUNROC DF-3401/DF-3301 WALL MOUNT DUAL WATER COOLER KIT
CARRIER 17FA5322514 INTAKE WALL 27″ IN DIAMETER 151061
BLACK BOX LS50124#R2 24-PORT CONSOLE SERVER 156412
JAMESBURY 815L-11-2236-TT 8″ BUTTERFLY VALVE 58224
CONSOLE SERVER 24-PORT LS50124-AE-R2 153146
TIRE VALVE EXTENSION-PACK OF 1000 161135
BLACK BOX LE2124A-R2 12 PORT AUTOCROSS 162964
RHEEM E10-12-G 10 GAL COMMERCIAL WATER HEATER 146358
LUXAIRE FL9C120D20DH11 120,000 BTU 95% GAS FURNACE
BLACK BOX KV1702C RECEIVE CARD 154166
NORDYNE FG6TE080C-IQB 80,000 BTU 95% AFUE GAS FURNACE