ME 360 Midterm: ME 360 Alabama Test2 S10
Document Summary
Closed book, one 8. 5 inch x 11 inch page of formulas allowed: true/false questions (1 pt each) Placing a smaller resistance across the leads of a dynamometer"s motor increases the load or torque. A 60-tooth gear/pickup system gives a frequency in hz that is identical to shaft speed in rpm. Universal motors are named as such because they are suitable for any small motor application. Leds are used with both absolute and incremental encoders. Accelerometers are frequently used to measure high frequency ( > 1000 hz) vibrations. An lvdt can operate off either ac or dc voltage source. A dc motor, a dc generator, and a dc tachometer all have the same physical construction. A first-order system reaches 63. 2% of the final value in 1 time constant. The speed of an ac induction motor depends on input frequency and number of poles only.
