SU636765A2 - Apparatus for automatic control of self-sustained electric power plant - Google Patents

Description

clamps to the pilot of the angular velocity of rotation of the engine, and sbixoaHbnvjH clamps through the additionally introduced diode and resistance, shunted by the break contact. relay, to the control winding of the electromagnetic controller. The coil of the relay is connected to the output terminals of the magnetic amplifier and, through the second additional input diode, to the control winding of the electromagnetic regulator.

The drawing shows a circuit diagram of the device.

A functional non-linear unit 1 that implements a quadratic function of the angular velocity of rotation is connected to the speed sensor 2 by the input terminals. A speed sensor 2 connected to the engine shaft 3 of the internal combustion generates a signal proportional to the actual angular velocity of the engine. The output of the functional unit, the voltage of which is proportional to the square of the angular velocity of the engine, is connected through diode 4 and resistance 5 to the control winding of electromagnetic regulator 6. Relay coil 7, disconnecting contact 8 of which bypasses resistance 5, is connected to output terminals of magnetic amplifier 9. Diode 10 separates the power supply circuit of the relay coil 7 and the output of the functional unit 1, which excludes the switching on of the relay from the functional unit when the voltage on the alternator disappears.

During normal operation of the device, the sum of the currents of the uncontrolled Semiconductor bridge i j and the magnetic amplifier {, output, flows through the control winding of the electromagnetic regulator 6. at the same time, the current of the functional unit 4 has a minimum value, since the relay 7 is turned on, and its opening contact 8 is open and the resistance 5 is connected to the current circuit.

When the voltage on the alternator disappears, the voltages at the output of the uncontrolled semiconductor bridge and the magnetic amplifier disappear, the currents and f, j become equal to zero, the relay 7 turns off and its break contact 8 closes, the resistance 5 closes and the current increases to a value equal to the sum of the currents

U a

Due to quadratic dependence

The output voltage of the function block from the angular velocity of the motor current is also a quadratic function of the speed, and therefore the angular velocity of the BHjnrpeHHero combustion engine and the generator is limited to a given level and kept constant.

The application of this invention prevents the occurrence of an emergency mode and ensures uninterrupted power to consumers with a constant and single-phase alternating current; which improves the performance of the device.

Claims (1)

Invention Formula A device for automatic control of an autonomous electric power installation according to aut. St. No. 262229, characterized in that, in order to protect the internal combustion engine and the alternator generator from an unacceptable increase in their angular rotational speed when the voltage disappears on the alternator, it is equipped with an angular rotational speed sensor and a functional non-linear unit connected by input terminals to the sensor of angular speed of rotation of the engine, and the output terminals to the control winding of the electromagnetic regulator through the additionally introduced diode and are parallel connected resistance and normally closed contact of the relay, whose coil is connected to the output of the magnetic amplifier and via a second further diode is introduced - to the coil of the electromagnetic regulator.