JPH01120737U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 shows an inverter circuit including a drive coil of a compressor according to the present invention and its related devices, and FIG. 2 shows an embodiment of the compressor according to the present invention. In the figure, 100 is a voltage detection section, 200 is a photocoupler, 300 is a control section, ZD is a Zener diode, TM is a timer, D ₁₁ , D ₁₂ ... are diodes, R ₁₁ , R ₁₂ ... are resistors, C ₁₁ , _C1
2 ...indicates a capacitor, respectively.

Claims (1)

[Claims for Utility Model Registration] A compressor driving inverter that converts energy from a DC power source into alternating voltage energy, and a driving coil connected to the output of the compressor driving inverter, The inverter alternately uses a time constant circuit having a time constant corresponding to the period of mechanical vibration of the compressor, and a control signal generated by repeated charging and discharging corresponding to the mechanical vibration in the time constant circuit. In a compressor equipped with a switching device that turns on and off, the compressor is provided with a compressor shock prevention device that is activated by detecting a state in which the output voltage of the inverter abnormally increases and an electrical shock is generated, When the shock prevention device detects the abnormality, the shock prevention device forcibly short-circuits the control signal, stops input signals to the switching device all at once, and causes the output voltage level of the inverter to suddenly drop to around a zero level. A compressor equipped with an impact prevention device, characterized in that the forcibly short-circuited state is later restored.