SU1476571A2 - Thyratron motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the development of valve electric motors (HP) with combined rotor bearings. The purpose of the invention is to increase reliability and enhance functionality. The motor contains an additional primary winding 11 on the choke 10 and the first additional output winding 12, which through diodes 13 and 14 is connected to the input of the filter 15, the output of which through the contacts of the normally closed relay 16 is connected to the input of the transistor switch 17, and its emitter is connected to middle points additional primary winding 11 and output winding 12. The beginning and end of the sections of the primary winding 11 are connected respectively to the beginning and end of the sections of the main winding 9. The collector of the transistor switch 17 through the winding 18 W contact magnetic coupling and the current sensor 19 is connected to the positive power source. The output of current sensor 19 is connected to the input of the first shaper 20 of the signal, the output of which is connected to the first input of the matching circuit 21 and the input of the time delay device 22, the output of which is connected to the second input of the matching circuit 21, and its output connected to the first input of the OR 24 element, output which is connected to the control input of the relay 16. The input of the counter 23 pulses with self-blocking is connected to the output of the first shaper 20 signal, and its output is connected to the second input of the element OR 24. To extend the functionality of The vibration sensor 27, the output of which is connected to the input of the second signal conditioner 26, is output connected to the input of the threshold device 25, the output of which is connected to the third input of the OR 24 element. The second additional output winding 28 on the balancing throttle 10 through the diodes 29 and 30 is connected to the input the second filter 31, the output of which is connected to the input of the controlled stabilizer 32. The output of the stabilizer 32 is connected to the positive power bus of the pulse counter 23 with self-locking, and the middle point of the second additional output winding 28 is connected to the negative bus of the power source of the counter 23 pulses with self-locking. This connection scheme allows to eliminate the false positives of the counter with self-blocking at the moment of acceleration of the electric motor and in the case of the presence of impulse noise in the power supply circuit of the VD. 2 hp f-ly, 2 ill.

Description

The invention relates to electrical engineering and can be used in the development of valve electric motors (HP) with combined support for the rotation of the rotor.

The aim of the invention is to improve the reliability of the VD and the expansion of its functionality.

FIG. 1 shows the electrical circuit of the VD; in fig. 2 - a variant of the structural scheme of the electrical part of the VD.

The valve motor (Fig. 1) contains switch transistors 1-4, connected respectively to sections 5-8 of a synchronous machine. The middle points of the sections are connected to the primary primary winding 9 of equalizing throttles 10, on which winding 11 is wound, connected in parallel and according to the winding 9 of equalizing throttles 10, straightening diodes 13, 14 are connected to the terminals of the winding 12 of equalizing throttles 10, 14 15 and the contacts of the opening relay 16 with the control input of the transistor switch 17, the collector of which through the electromagnetic coil winding 18, the current sensor is connected, for example, to the positive power supply bus. The current sensor 19 is also connected to the middle point of the winding 9 of equalizing throttle 10. The emitter of transistor switch 17 is connected to the middle points of the windings 11 and 12 of equalizing throttles 10. The output of current sensor 19 is connected to the input of the first driver 20 of the signal, the output of which is connected to the inputs of coincidence circuit 21 , the device 22 time delay and counter 23 pulses with self-locking.

The outputs of the counter 23 pulses with self-locking and matching circuit 21 are connected to the inputs of the OR circuit 24, the output of which is connected to the control input of the disconnecting relay 16. The third input of the circuit OR 24 is connected to the output of the threshold device 25, - whose input is connected via the second signal conditioner 26 with a vibration sensor 27. To the outputs of the fourth winding 28 of equalizing drossel 10 °, rectifying diodes 29, 30 are connected, connected via a second filter 31 to the input of a controlled voltage regulator 32, the output of which is connected, for example, to positive bus power counter 23 pulses with self-locking. Minus bus power meter counter 23 pulses with self-locking connected to the midpoint of the fourth winding 28 throttling equalization, 10.

The electric motor includes a housing 33 with a stator 34 and a rotor 36 position sensor 35 fixed therein.

a permanent magnet 37 and an outer sleeve 38 of the gas-dynamic support, an axis 39 fixed in the housing 33 and bearing ball bearings 40, an internal sleeve 41 of the gas-dynamic support mounted on the outer rings of the ball bearings 40, an electromagnetic coupling, the winding 18 of which is installed in the housing 33, a measles 42 is matched by sliding fit with the corresponding surface of axis 39.

Between the cylindrical surfaces of the sleeves 38 and 41 there is a working gap 43 of the radial gas-dynamic bearing, and the working clearances 44 of the thrust gas-dynamic bearing are formed by the end surfaces of the sleeves 38, 41 and the liner 45. To ensure increased operating time, the ball bearings 40 are provided with a sub-chamber 46. Korore 42 and housing 33 installed spring 47.

When the electromagnetic clutch winding 18 is de-energized, the rotor 36 rotates on ball bearings 40. When current is supplied to the winding 18, the electromagnetic clutch operates, the measles 42 inhibits the movement of the sleeve 41, and the rotor 36 rotates on gas-dynamic bearings.

Valve motor (BD) works as follows.

At the time of the start of the VD, a starting inrush occurs in the power supply circuit, which is detected by the current sensor 19, the signal from which is fed to the input of the first driver 20 of the signal. The generated signal is fed simultaneously to the inputs of the coincidence circuit 21, time delay device 22, and self-locking pulse counter 23.

The constant time of the device 22 of the time delay is chosen equal to the acceleration time of the VD.

Thus, during breakdown B, the inputs of the coincidence circuit 21 arrive from the output of the first signal generator 20, indicating that the motor current has not decreased to the nominal value, and the signal from the output of the time delay device 22. The coincident circuit 21 is triggered and through the circuit OR 24 opens the contacts of the relay 16, which disconnects the control input of the transistor switch 17 from the first filter 15. Thus, the coil 18 is electromagnetically coupled de-energized, the axis of the VD rotational combination support turns out to be accelerated on ball bearings.

As the VD accelerates, the current consumed begins to decrease. At the same time, a voltage appears on the winding 12 of equalizing choke 10, the number of turns of which is chosen such that the voltage at the output of the first filter

15 reaches the value necessary to reliably open transistor switch 17 at an HV rotation frequency close to nominal.

As soon as the current consumed by the VD is reduced to the nominal value, the voltage at the output of the first signal conditioner 20 disappears, the response of which is set by the reference voltage Uofl. As a result, the signal at the output of the circuit 21 is missing, rel

16 is voltage-free and the voltage from the first filter 15 is supplied to the control input of the transistor switch 17, which opens and connects the winding 18 of the electromagnetic clutch to the power source obtained by directing the ECS rotation in the winding 11 of balancing throttles 10 while rotating the VD. This makes it possible to refuse an additional power source to hold the clutch.

The electromagnetic clutch is activated and locks the shaft of the combined support of the HP rotation. VD begins to rotate on gas-dynamic bearings.

During the acceleration of the VD, a voltage appears on the winding 28 of equalizing throttles 10, the number of turns of which is chosen so that the voltage at the output of the controlled stabilizer-voltage 32 corresponds to the voltage of the meter with a self-blocking at nominal HP rotational speed.

Upon reaching the nominal rotational speed VD, a command U is sent to the controlled voltage regulator 32, from which the supply voltage is supplied to the self-locking pulse counter 23, which is simultaneously established in the state.

If during the VD operation on gas-dynamic bearings, a gas layer breaks through, the friction in the bearings increases rapidly, which will be immediately noted by the current consumed by the VD, current sensor 19, signal

14765716

zero Thus, the invention allows to increase the reliability of the VD and to expand its functionality.

The described VD is intended for continuous operation in fans and pumps.

The power part of the HP switch can

from which through the first driver 10 to be performed according to the sectional scheme

The signal goes to the circuit inputs.

21 matches, time delay device 22 and pulse counter 23 with self-locking. Since the gas layer breakthrough in gas-dynamic bearings has the character of pulses whose duration is much less than the acceleration time of the VD, the coincidence circuit does not work, but the number of these breakthroughs starts counting the counter of 23 pulses with self-locking set for the specified number of pulses. When this number is reached, the self-locking pulse counter 23 self-locks and, via the OR 24 circuit, opens the contacts of the relay 16. The electromagnetic coil winding 18 is de-energized and the VD begins to rotate on ball bearings. This eliminates the accelerated wear of the gas-dynamic bearings, eliminates the imbalance of the HP rotor caused by the wear of the gas-dynamic bearings, and puts into operation the backup ball bearings, which increases the reliability of the HP as a whole.

Sometimes, gas-dynamic bearings become inoperative under conditions of increased vibration. In order to ensure the operation of the VD in a wide range of vibrations, a control channel from the vibration sensor 27 has been introduced into the VD circuit, which provides enhanced functionality of the VD. When vibrations occur, the signal from the vibration sensor 27 is fed to the input of the second signal conditioner 26. The generated signal is fed to the threshold device 25, which is triggered if the frequency and amplitude of vibrations are above the set value, and through the OR circuit opens the contacts of the relay 16, as a result of which the coil 18 of the electromagnetic clutch will have 55 gas-dynamic bearing hub

de-energized. The axis of the combined rotational support is not locked, and the VD will rotate on ball bearings.

mounted on bearings mounted on an engine axis; measles of an electromagnetic clutch mounted on an engine axis along a sliding fit

with a midpoint (shown in Fig. 1) or a bridge circuit.

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Claims (3)

1. Valve motor autom.St. No. 1203654, characterized in that, in order to increase reliability and enhance functionality, an additional gas-dynamic bearing with external and internal bushings, an electromagnetic clutch containing a winding and a measles switch, a transistor switch, a current sensor, a first driver, a coincidence circuit, time delay device, self-locking pulse counter, OR logic element, with the beginning and the end of the third winding of the balancing throttle through the diodes, the first filter and the opening relay contacts They are connected to the control input of the transistor switch, the emitter of which is connected to the middle points of the second and third windings of the balancing throttle, and the collector is connected to the input side of the first signal conditioner through the electromagnetic coupling winding and the current sensor, the output of which is connected to the first input of the coincidence circuit, the input of the time delay device and the input of the pulse counter with self-blocking, output 5 of the time delay device is connected to the second input of the coincidence circuit And output the coincidence circuit via a first input of the OR gate is connected to the control input of the interrupter relay, the pulse output of counter latching is connected to the second input of the OR gate, on the outside of the sleeve gas-dynamic bearings mounted rotor, and intra- mounted on bearings mounted on an engine axis; measles of an electromagnetic clutch mounted on an engine axis along a sliding fit against the inner surface of the inner sleeve, and located one against the other surface of the core of the electromagnetic clutch and the inner sleeve is made conical. 2. An electric motor according to claim 1, characterized in that, in order to increase the reliability of the engine under mechanical stress conditions, a vibration sensor mounted on the housing, a second signal conditioner and a threshold device are inputted to it, the output of the vibration sensor is connected to the input of the second signal conditioner, the output of which is connected to the input of the threshold device, the output of which is connected to the third input of the OR gate. 45 M M 3 36 37 J4 TL4LLYL 0 L YU 43 V 4ff 40 X. 43 V 4ff 40 4765718 3. Electric motor on PP. 1 and 2, characterized in that a fourth winding is inserted in it, located on the equalization with a choke, the third and fourth diodes, a second filter and a controlled voltage regulator, with the beginning and end of the fourth winding of equalizing throttles through the third and fourth 10 diodes and the second filter connected to input controlled voltage regulator, the output of which is connected to the positive terminal of the power supply circuit of the pulse counter with self-blocking, 15 is the middle point of the fourth winding equalizing throttle is connected to the common wire of the power supply of the pulse counter with self-blocking. 33 35 43 V 4ff 40 X. L L W 43 V 4ff 40 M 47 18 39 Schig.2