SU660158A1

SU660158A1 - Power-diode electric motor

Info

Publication number: SU660158A1
Application number: SU731869752A
Authority: SU
Inventors: Виталий Федорович Шепелин
Original assignee: Предприятие П/Я А-7374
Priority date: 1973-01-08
Filing date: 1973-01-08
Publication date: 1979-04-30

Description

Известны вентильные электродвигатели, в которых коммутаци тиристоров при пуске осу1цествл етс путем перевода выпр мител в режим инвертора в такт с выходной частотой инвертора 1.Known valve motors are known in which the switching of the thyristors at start-up is accomplished by switching the rectifier to the inverter mode in time with the output frequency of the inverter 1.

Недостатком |Двнгател вл етс отсутствие устройства дл автоматического изменени угла опережени включени тиристоров инвертора.The disadvantage of the Dvngatel is the absence of a device for automatically changing the advance angle of turning on the inverter thyristors.

РУзвестен также вентильный электродвигатель , в котором -имеетс указанпое }строкство 2. Этот двигатель содержит спихронпую машину, секции обмотки кор которой соединены с выходом преобразовател частоты с инвертором, управл ющие цепи ключей которого соединены с выходом датчика положени ротора и тахометрнческим устройством через схемы импульснофазового управлени выпр мителем и инвертором , и устройство выбора режима ком-мутапни инвертора, входы которого соединены с выходом датчика положепп ротора и с выходом тахометрического устройС1ва , первый выход сс единег со в.хо.долг системы имнульспо-фазового управлени выпр мителем, второй вход - ео входом системы импульспо-фазового управлени инвертором . Данное техническое решение вл етс по своей технической сущности и достигаемому результату наиболее близким к цредлагаемому и может служить прототипом .The valve motor is also known in which there is a specified row 2. This engine contains a spihron machine, the winding sections of the core of which are connected to the output of the frequency converter with an inverter, the control circuits of the keys are connected to the output of the rotor position sensor and the tachometer device via pulse-phase control circuits a rectifier and an inverter, and a device for selecting the com-mutapni mode of the inverter, the inputs of which are connected to the output of the posterior-rotor sensor and to the output of the tachometer device, the first output of the ss is one with the i.kho.dolg of the system of pulse-phase control of the rectifier, the second input is its input of the system of the pulse-phase control of the inverter. This technical solution is by its technical essence and the achieved result is closest to the proposed one and can serve as a prototype.

Недостатком устройства вл етс то, что в нем переключение режимов может произойти при любых углах положени ротора в момент по влени сигнала па выходе указател сниженп скорости. Ноэтом :i дв1-1гателе возможно но вление малых зращаюииьх моментов при больших токах )-1 застревание двигател па промежуточной (жорости в ироцесее разгона привода со статическим моментом на валу.The disadvantage of the device is that in it the switching of the modes can occur at any angles of the rotor position at the moment when the signal appears on the output of the speed indicator. But this: i dv1-1gatele possible but the appearance of small incremental moments at high currents) -1 engine stuck interim (zhorosti in the process of acceleration of the drive with a static moment on the shaft.

Цель изобретени - улучшение пуско: .ы,х и регулировочных характеристик синхронного вентильного электродвигател на аизких скорост х при пит пии обмоток ста ооа от зависимого преобразовател часто ы со звеном посто нного тока.The purpose of the invention is to improve the start-up: x, x and adjusting characteristics of the synchronous valve motor at low speeds during feeding of the windings of the stationary to the dependent converter, often with a DC link.

Указанна цель достигаетс тем что тахометричеекое устройство выполнено в виде -шух дифференцирующих цепочек и одповибраторов, вход первой дифференци уюш ,ей пеночки соединен с выходом датчика положени ротора, а выход - со входом первого о/дновибратора, выход иервого одиовибратора соединен со входом второй дифференцирующей цепочки, выход которой соединен со входом второго одновибратора, пьшолиенного с возможностью обеспечени длительности выходного импульса, большей /длительности выходного импульса первого одновибратора, и входом устройства выиора режима коммутации, содержащего триггер, цепь св зи и блокируюи.;ий одно вибратор, служащий дл перевода выпр мител в инверторный режим, причем цепь св зи выполнена в виде третьей дифференцирующей цепочки, первый вход триггера сое-дипеи с выходом первого одновибраторл,This goal is achieved by the fact that the tachometer device is made in the form of –differentiating chains and single vibrators, the input of the first differential is Uush, the chiffchaff is connected to the output of the rotor position sensor, and the output is connected to the input of the first o / bottom vibrator, the output of the first odovibrator is connected to the input of the second differentiating chain , the output of which is connected to the input of the second one-shot, pi-brine with the possibility of providing the duration of the output pulse, the greater / duration of the output pulse of the first one-shot, and the input a switching mode selector device containing a trigger, a communication circuit, and a block.; one vibrator serving to transfer the rectifier to an inverter mode, the communication circuit being made as a third differentiating chain, the first coi-dipy trigger input, the first single vibrator,

а второй вход триггера - с выходом второ|о одновибратора, который также соединен со входом блокирующего одг-ювпбратора, выход триггера соедипен со вход,ом схемы импул1 с1 0-фазового )пранлепи j-iHaepTopowand the second input of the trigger - with the output of the second | one-shot one, which is also connected to the input of the blocking digger, the output of the trigger is connected to the input, om of the impul1 c1 circuit of the 0-phase) p-nlepi j-iHaepTopow

п через цепь св зи со входом блокирующего одновибратора. При этом втора дифференцирующа цепочка может быть выполнена е возможностью регулнрозани посто нной врсменн.n through a communication circuit with the input of a blocking one-shot. In this case, the second differentiating chain can be performed by the possibility of regularizing a constant variable.

Благодар такому нодключеппю элементов на одном из выходов триггера при KO.VIмутации тиристоров инвертора методом прерывани тока еигнал все врем отсутствует (иулевой сигнал). Этому состо ниюDue to such a switching element at one of the outputs of the trigger, when KO.VI is switched on the inverter's thyristors by interrupting the current, the signal is absent all the time (and the zero signal). This state

триггера в системе управлеии тиристорами пвертора соответствует угол регулировани р,, 0. В момепт по влени вместо nvлевого сигнала на выходе триггера едипич ; ()го сигнала должна начатьс естественна-гthe trigger in the pverter thyristor control system corresponds to the control angle p ,, 0. At the moment of occurrence, instead of the nv signal, the output of the trigger is typical; () of the signal should start naturally

коммутаци тиристоров за счет ЭДС фа ч статора, угол оиережепн включени тиристора инвертора изменитс па j3,7t 50 эл. град. Одновременно сишалом триггера через разделительный конденсатор в носледПИЙ раз (при (Зте 0) запускаетс блокируюпиш одноБибратор, вызыва перевод тирпсторов выпр мител в пиверторпый режим п закрытие всех тиристоров ш-твертора.switching of thyristors due to the emf of the stator frequency, the angle of switching on of the inverter thyristor will change at j3,7t 50 el. hail. Simultaneously with the trigger switch through the coupling capacitor, the nosledPIs times (when (0) the one-vibrator is started, causing the recircation of the switches of the rectifier to go to the t-tranverter.

В дальнейшем коммутаци тирпеторо .1инвертора оудет осуществл тьс за счетSubsequently, the switching of the Tirpetoro .1 inverter will be effected by

ЭДС фаз двигател ири угле регулироващт тиристоров .р„|-- 45-50 эл. град.The EMF of the motor phases and the angle is controlled by the thyristors. P „| - 45-50 el. hail.

На фиг. 1 изображеиа схема устройCTi;a .тл управлени коммутацией тпрнсторов вентильного двигател : где -/-- синхронный двигатель: 2, 3 - инвертор и выпр митель нреобразовател частоты; 4 - сглаживающий дроссель; 5 - тнрнстор дл шунтировани сглаживани FIG. 1 image of the device CTi; a. Control of switching of the motor of the valve motor: where - / - synchronous motor: 2, 3 - inverter and rectifier of the frequency converter; 4 - smoothing choke; 5 - smoothing shunt

дроссел ; 6 - система импульсного упрапленп тиристорамп инвертора (СИУ); 7 - устройство управлени тиристором 5; 8 - система импульсно-фазового уиравленн тиристорами выпр мител (СИФУ); 9 -Drossel; 6 - a system of pulse preplenap thyristor inverter (SIU); 7 - thyristor control device 5; 8 - system of pulse-phase leveling by rectifier thyristors (SIFU); 9 -

лснлитель; 10 - тахогенератор; // - датчик положени ротора, выполпепный, иапрпмер , па бесконтактном сельсине с моду .чироваиием входного и демодулированием выходного сигналов с последующ1 М преобразованием выходного сигнала в импульсы пр д1:оугольной формы; 12 - система фазового управлени (СФУ) тиристорами инвертора; 13 - перва .дифференцирующа п.епочка; 14 - статический триггер выбораripper; 10 - tachogenerator; // - rotor position sensor, vapolpepny, iprpmer, on a non-contact selsine with modulation of the input and demodulation of the output signals with subsequent 1 M conversion of the output signal into pulses of the direct e1: rectangular shape; 12 - phase control system (SFU) of the inverter thyristors; 13 - the first differentiating p. 14 - static selection trigger

Claims

switching mode thyristors of the inverter; / 5 - the first odbowater; 16 - second differential chain, with adjustable discharge time, deisator; 17 - the second one-shot; 18 - one third diffraction chain; 19 - block the one-shot; 20 - power; 2 - current transformers; 22 - TMi sensor: ;; L.i is the driving voltage. The initial state of the circuit: the signal is equal to zero, and the voltage at the output of rectifier 3 is absent, the signal from the rotor position sensor through SFU 12 and SSI 6 is applied to the thyristors of inverter 2, but due to the absence of voltage at the output of the rectifier 3 , the current in the stator windings of the motor / does not leak. The trigger 14 is in a position where there is no signal at the output. After supplying the drive voltage U.J at the SIFU S input and at the output of the rectifier 3, a voltage appears, current flows through the two phases of the stator of the motor, and, interacting with the rotor magnetic flux, creates a torque. The rotor of the engine rotates at a certain angle. At the same time, a signal appears at the output of the rotor position sensor //, which, through a differentiating chain capacitor, starts the one-shot 15 and a signal from the one-shot 15 through the RC-chain with an adjustable discharge time of the capacitor 16, starts the one-shot 17, which in turn starts the blocking one-shot 19. At the same time, the signal from the one-shot 15 and 17 is applied to the input of the static trigger 14. Since the duration of the output signal from the one-shot 17 is longer than from the one-shot 15, then after returning the one-shot / 5, 17, the static trigger 14 will remain in its original position when its output, connected to the SFU 12, does not contain a signal, which corresponds to the control angles | 3m 0. At the same time, the signal from the single-oscillator 19 through the amplifier 20 controls the angles of the rectifier 3 r, el. hail, rectifier 3 goes to inverter mode. The phase current of the engine begins to decrease. After the current has been reduced to zero by a signal from the current sensor 22, the single vibrator 19 is reset to the initial state and the thyristors of the rectifier 3 are again switched to the rectifying mode. The current in the motor rises again to the same value, but already in two other phases, corresponding to a different position of the sensor, //. The rotor of the engine turns back on 60 el. hail. If the rotor rotates 60 el. hail, fast enough, i.e., the engine speed has reached a predetermined value, then by this time the capacitor of the RC-chain 16 will not have time to discharge, and despite the presence of a signal at the output of the one-shot 15 the one-shot 17 does not start. In this case, the signal is fed only to the first input of the static trigger 14, which changes its state in such a way that a signal appears at its output connected to the SFU 12. (From the trigger 14, the regulation angles of the TiiPiicTopoB of inverter 2 are changed to X-ray; -; - .. deg. Simultaneously through time the chain 18 capacitor starts a one-shot 19, issuing a command to extinguish previously opened thyristors 2. This is necessary to prevent breaking the inverter 2, whose thyristors worked with | 3, 0 and commuting the current themselves could not. Further, the rotor from the rotor position sensor 11 did not run to the single vibrators 17, 19 and the thyristors of the inverter 2 were switched by the electromotive voltage of the motor phases. 2 presents temporary D 1 phase change emf emf units in units A, B and C of stator currents f.-yd, / s ii motor torque Md with natural comb and switching when interrupted by 1 current based on alternately switching the rectifier thyristors to the inverter mode on the contrary, the decay angles II of the current rise during the commutation by the method of current interruption for simplicity are assumed to be zero, and the angle of the commutation of the current is expressed through the angle of the current-free zone 6 / ,. In the starting mode, Pt 0 is adopted, and in the natural switching mode | 3 45 ° el. hail. From FIG. 2 that if during the angle of rotation of the rotor, points a and b did not switch to natural commutation (left part of Fig. 2). This may result in a two-phase mode with an initial opening angle close to p, and, as a result, a small torque. If at the point o there is a switch over to the natural switching mode (the right part of the php. 2), then between the points a and b there is no decrease in the torque of the engine, and at the point b the natural commutation starts with current flowing through all three phases of the engine. The engine torque in this mode is reduced slightly (about 13-14%). Thus, in the valve motor, the control system is automatically switched from p, 0 to electric. hail, at the moment of issuing pulses from the position sensor in 3 ", 0, in a strictly defined position of the rotor, which improves the starting properties of the engine. Claim 1. A valve motor containing a synchronous mask, the winding section of the core of which is connected to the output of the frequency converter with an inverter, the control circuits of the keys of which are connected to the output of the rotor position sensor with a tachometer device through the circuits of the pulse-phase control of the rectifier and the inverter, and device Byoor; the switching mode of the inverter, which is connected to the output of the rotor rotor and the output t;: scrap of the device, first output ;, connect with the input of the pulse phase correction system, secondly; zyho / d - with the input of the impulse-phz control system ipvsrtor, from l and chu; tsi and with the fact that, in order to improve n; the engine characteristics, the tachometer device is made in the form of two differentiating circuits n two oyovpbratorov , the input of the first differentiator;.-yu; chain of chains is connected to the output of the sensor and rotor plate, and the output is connected to the input of the first one-vibrator, the output of the first single-vibrator is connected to the input of the second differentiating chain, the output of which is connected to the input of the second single-vibrator that can not be switched Strongly provide the output pulse duration greater than the duration of the output pulse of the first odpovpbratora, and the input selection device;

switching, including trigger, communication circuit I blocking one, which serves to translate rectifier in; rotary mode, T;) or the communication circuit in the form of the third differential circuit, the first input of the trigger connects to the output of the first single socket, and the output of the second virov, the second trigger, connect the second trigger, and the output of the second single trigger, and the second one, Connected to the input of the blocking odiovibrator and to the second input of the trigger, the output T1 of the igger is connected to the input of the pulse-phase control of the inverter, and through a communication circuit to the input of the blocking single-oscillator.

2. Electric motor for and. 1, which is the fact that the second dmffrepkiruyuidaid chain 1; Completed with the ability to regulate its constant time.

Sources of information, which were taken into account during the examination:

1. Pateit Velikobuit itz L 1246970, cl. H 2 A, 09.22.77.

2. Pateit USA. Yo 3696278, cl. 318-138, 10.23.72.

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