SU1240669A1 - Device for controlling three-phase current switch machine - Google Patents

Description

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The invention relates to devices for automation and remote control in railway transport,

. The purpose of the invention is to increase reliability.

The drawing shows a schematic diagram of a device for controlling a three-phase switch current drive.

The device contains a polarized starting relay 1 with switchable 5 with contacts I .., 1,2, 1.3, i.4,., 5, 1.6, 1.7, 1.85 1.9, a neutral starting relay 2 with contacts 2.1, 2.2, 2.3, 2.4 , 2.5, 2.6, 2.7, the power supply of which includes contacts 3 of the hand grip, switching contacts 1.1, 1.2, 1.3 of the polarized starting relay 1, contact 4 of the relay controlling the position of the arrow, diodes 5 and 6, key elements, in the form of thyristors 7, 8 9 and 10 ,.

In parallel with the thyristor 10, the diodes 1 1 and 1.2 connected in series with the opposite side of the diode are connected to the same (negative) pole of the DC power source by cathodes. A phase-clamping unit 13 is connected to the neutral starting relay 2 by outputs of a constant polarity, three outputs of which are not current that are connected through the front contacts 2.2, 2.4, 2.6 to the axial Contacts 1.4, 1.7 switching contacts of the polarized starting relay, direct and return contacts 1.5, 1.8, 1.6, and o9 are connected to pins 14, 15, 16., 17s– 8 9, 20, and 21. an autoswitch, to which a diode is also connected, 22 with a resistor 23 and a stator winding 24 of an electric motor.

The control value of the thyristor 7 through diodes 25 and 26 and the resistors 27 and 28 are connected to the first and second outputs of the timed current of the phase control unit I3, the control value of the thyristor 8 through the diodes 29 and 30 and the resistors 31 and 32 are connected to the second and the third element in the fuse of the non-alternating current of the phase-monitoring unit 13, controlling the thyristor 9 through diodes 33 and 34 and resistors 35 and 36 are connected to direct 1.5 and reverse. 1.9 contacts switch contacts of polarized starting 1) 8-- le 1, reverse. . B and b my 1.6 contacts through which resrstors

five

406692

37, 38 and diodes 39, 40 are connected to the control electrode of the thyristor 10.

The rear contacts 2.3 and 2.5 of the neutral start relay 2 are connected. The control relay block 41 is connected to the rear contact 2.4, another (positive) half power supply.

The device also contains linear wires 42 ,, 43, 44, 45 and 46.

The device works as follows.

In the presence of all three phases and the integrity of the connecting linear

The 5 wires of the thyristor circuit 7, 8, 9, and 10 receive power, as follows: first phase, resistor 27, diode 25, control electrode TivpKCTOpa 7, atomic cathode

 thyristor, diode 26, resistor 28. and the second phase; second phase, resistor 31, diode 29, univ1SchSch-1y electrode of thyristor 8, cathode of this thyristor,. a diode 30, a resistor 32 and a third phase (thus, TPR1 Stores 7 and 8 rotate all three phases at the start of the drive); the positive pole of the HCTO4HiHfa power supply, the backside contact 2.7 of the start relay 2, the lead 46, the stator winding 24, and then along two chains: contact 21 auto-switches; l, linear line, d 45, resistor 36. diode, d 34, control electrode of thyristor 9, diode 11, negative pole of the power source; contact 19 autoswitch, line wire 43, resistor 37, diode 39, control thyristor 10 ypd electrode, diode 12, negative power supply zero pole (in control mode - l 9 x 10 thyristorosis 9 n 10, the integrity of the line voltage is checked wires of 43, 45 and 46, if the arrow is in the positive zero and 1 and 15 lines of wires 42, 44 46, if the arrow is in the 3 minus position).

After closing the contact of the 3 hand knob, the anode voltage

L through the winding of the starting relay 2 is applied to the thyristors 7, 8, 9 and 10, ..ie are opened and the starting relay 2 is turned on. Next, the polarized, starting p €; le 1, which rotates, triggered along. Measurable measles, replaces the interlacing of I pas in value of nutrition. the electric motor and the cr-monitor packs do not translate. If a single phase is missing at the beginning of the drive start or one of the line wires is broken (which is equivalent to a phase loss), then one of the thyristors 7, 8 does not open,

9 or 10, As a result, after closing the contact 3 of the dial knob, the power supply circuit of the starting relay 2 does not form and the power supply circuit of the electric motor does not close.

2i if

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Editor L.Povkhan

Compiled by U.Sokolov Tehred M.Hodanich

Order 3445/15 Circulation 473 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Rautlska nab. D. 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader O.Lugov

Claims (1)

DEVICE FOR CONTROL OF ARROW DRIVE OF THREE PHASE CURRENT, containing polarized and neutral starting relays, the power supply circuit of which includes the contacts of the arrow handle and the first switching contact of the polarized starting relay, phase monitoring unit, to the outputs of which through the front contacts of the neutral starting relay and the second direct and third reverse switching the contacts of a polarized start relay are connected to an electric motor, characterized in that, in order to increase reliability, it is equipped with key elements those included in the power supply circuit of the neutral start relay, and the control input of the first one through the first and second diodes is connected to the first and second outputs of the phase control unit, the control input of the second through the third and fourth diodes is connected to the second and third outputs of the phase control unit, the control input of the third - through the fifth and sixth diodes to the second direct and third reverse switching contacts of the polarized start relay, to the third direct and second reverse contacts of which through the seventh and the eighth diode is connected to the g equalizing input of the fourth key element, parallel to which the ninth and tenth diodes are connected in series and counterclockwise, the cathodes of which are connected to one pole of the power source, and its rear contact connected to the other pole is connected in parallel to one front contact of the neutral start relay power source. SU. „. 1240669