AMPLITUDE RESPONSIVE SPEED-SWITCH CONTROL

摘要

S-Start 103 AMPLITUDE RESPONSIVE SPEED SWITCH CONTROL A speed-switch control comprising a multi-pole sub-fractional permanent magnet A.C. generator driven by a shaft; the generator develops an initial A.C. signal having an amplitude representative of the shaft speed, and that signal is applied to a threshold circuit where it is rectified and compared with a threshold amplitude correlated with a critical shaft speed range to generate a D.C. switch actuation signal. The D.C. switch actuation signal actuates a solid-state switching circuit to switch a controlled load, such as a safety interlock or alarm, into and out of an external operating circuit.