|
Title: |
1909 Article-Westinghouse Electric & Mfg. Co., Electric Motors |
|
Source: |
Cyclopedia of Applied Electricity, 1909 pgs 449-453 |
|
Insert Date: |
11/15/2011 3:06:09 PM |
|
W estinghouse Electric & Manufacturing Co — A line of motors, designated type EM, are built in standard capacities from 90 H. P. up and for standard voltages from 110 to 650. They are intended to supply the demand for large power units. They are designed for direct connection or to be belted, geared, or coupled to the work. With proper windings they are suitable for constant-, varying-, and adjustable speed service. They are essentially the same frames as the self-contained generators previously described. One of these motors is shown in Fig. 105. Their line of type S motors are made in 13 frames. Used as constant-speed motors they have ratings from 2 to 75 H. P. at 110 volts, from 2 to 150 H. P. at 220 and 500 volts, and from 6 to 100 H. P. at 600 volts. They are mounted in any of the four positions and built partially or totally enclosed. One of these machines operating a heavy shears is shown in Fig. 106. They can also be used as adjustable-speed motors for speed variations of 1 to 1½ or 1 to 2. They are also used as elevator motors when furnished with a series winding used for starting but cut out for normal running. Adding auxiliary or interpoles to these shunt-wound machines gives adjustable-speed motors of greater speed variation, of ½ to 23 H. P. at a speed ratio of 1 to 4, 4 to 50 H. P. at a speed ratio of 1 to 3, and another line of elevator motors of 10 to 50 H. P. at a speed ratio of 1 to 2. For the smaller size constant speed motors they use the 8 frames of their type R generators. The bipolar range from ¼ to 1¾ H. P. and the 4 pole, from 2 to 10 H. P. These machines are also mounted and enclosed as desired. Similar construction to the bipolar type R machines are their fan motors and very small power motors in 1/20,1/12 or 1/8 H. P. The Westinghouse also furnishes a complete line of railway motors and lines of mill and hoisting motors. Their mill motors are of very similar design in five sizes from 25 to 150 11. P., but wound for 220 volts. They are series or compound wound as desired; in the latter the shunt winding keeps the no-load speed down to about twice full-load speed. Their hoisting motors consist of 10 frames, wound for 110, 220, or 500 volts, ranging from 2 to 52 H. P. They are 4 pole, series wound, fully enclosed. Fig. 108 shows one of these arranged with back shaft and gear. |
|
1909 Westinghouse Electric & Mfg. Co., Electric Motor Operating Gun Lathe
1909 Westinghouse Electric & Mfg. Co., Electric Motor Geared to Heavy Shears
1909 Westinghouse Electric & Mfg. Co., Electric Hoisting Motor
|
|