FIELD: direct-current electromagnetic operating mechanisms for forced control of computerized and control devices.
SUBSTANCE: proposed device has generator, timer, and current supply depending for its operation on voltage level connected to power supply, their outputs being connected to input of integrator with two integration-constant steps; integrator output is connected to input of inherent reference voltage comparator whose output is connected to control input of transistor switch; first power lead of the latter is connected to minus bus of power supply; second power lead of transistor switch is connected to first lead of current-limiting resistor whose second lead is connected to anode of protective diode; cathode of the latter is connected to plus bus of power supply; electromagnet coil terminal leads are connected to anode and cathode of protective diode.
EFFECT: enhanced reliability.
1 cl, 1 dwg
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SU1712945A1 |
