Driving force control device for compressor

Abstract

Abstract PURPOSE: To protect related equipment of compressors by detecting emergency shutdown of a compressor and hence promptly disengaging coupled conditions of a driving system by means of an electromagnetic sensor which monitors operating conditions of a compressor. CONSTITUTION: Rotation of driving shaft 3 produces a magnetic flux between a magnet 20 and the driving shaft 3. The density of the magnetic flux varies when a groove 17, cut in the rear end surface of the shaft 3, faces the magnet 20. The change of the density of the magnetic flux produces voltage pulses in an electromagnetic sensor 18 in a cycle responding to a rotating speed of the driving shaft 3. Therefore, voltage pulses are generated periodically when a compressor is normally functions. When a compressor comes to an emergency halt due to damage of a part, however, pulses are not generated. If a pulse detector detects the absence of pulses, the detector generates a "STOP POWER SUPPLY" signal and stops a driving input of the compressor and hence protects a driving system and its related equipment. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Hiroya Kono
• 👤 Atsushi Hasegawa
• 👤 Mitsukane Inagaki
• 👤 Hisao Kobayashi

Bibliographic Details