SI9400192A

SI9400192A - Process for electronic regulation of personal transport devices

Info

Publication number: SI9400192A
Application number: SI9400192A
Authority: SI
Inventors: Peter Hoefling
Original assignee: O & K Rolltreppen Gmbh
Priority date: 1993-04-26
Filing date: 1994-04-25
Publication date: 1994-12-31
Also published as: WO1994025386A1; JPH08512273A; DE4313424C2; EP0696255A1; HRP940249A2; CN1099005A; KR950704178A; BR9406508A; DE4313424A1; YU21794A

Abstract

A process for the electronic control of people conveyors in which the drive of the people conveyor is switched on and set to a predetermined stand-by speed via at least one frequency converter which is maintained until a monitoring device detects the conveyance of people and sets the people conveyor to a predetermined transport speed via the frequency converter and, on reaching the transport speed or on exceeding a predetermined load or number of people, switches the drive over to mains operation.

Description

POSTOPEK ZA ELEKTRONSKO KRMILJENJE OSEBNIH TRANSPORTNIH NAPRAVPROCEDURE FOR ELECTRONIC CONTROL OF PERSONAL TRANSPORT DEVICES

Področje tehnikeThe field of technology

Izum se nanaša na postopek za elektronsko krmiljenje osebnih transportnih naprav, kot so tekoče stopnice ali tekoče steze.The invention relates to a process for the electronic control of personal transport devices such as escalators or escalators.

Tehnični problemA technical problem

Cilj predmeta izuma je, zasnovati tak postopek za elektronsko krmiljenje osebnih transportnih naprav, kot so tekoče stopnice ali tekoče steze, s katerim bo osebno transportno napravo možno po eni strani krmiliti v odvisnosti od potrebe, po drugi strani pa naj bi bili odpravljeni tokovni sunki in stroški jalovega toka in znižana celotna poraba energije.The object of the invention is to devise such a method for the electronic control of personal transport devices, such as escalators or escalators, which will allow the personal transport device to be controlled on one hand as needed, and on the other hand to eliminate the power surges and reactive power costs and reduced total energy consumption.

Znano stanje tehnikeThe prior art

Splošno je znano, da se pogon tekočih stopnic lahko vključuje ali izključuje v odvisnosti od tega, ali so osebe prisotne ali ne, tako da tekoče stopnice bodisi tečejo z normalno hitrostjo ali stojijo. Enako velja seveda tudi za tekoče steze. Pomanjkljivost takega pogona je v tem, da visoki tokovni sunki, ki se pojavljajo ob stalnem vključevanju in izključevanju, škodljivo vplivajo na življensko dobo pogonskega mehanizma.It is well known that escalators can be switched on or off depending on whether or not persons are present, so that escalators either run at normal speed or stand. The same applies, of course, to running lanes. The disadvantage of such a drive is that the high current surges, which occur with constant switching on and off, adversely affect the life of the drive mechanism.

Opis rešitve tehničnega problemaDescription of solution to a technical problem

Cilj je uresničen s postopkom, pri katerem je pogon osebne transportne naprave stalno vključen in je hitrost osebne transportne naprave preko najmanj enega frekvenčnega pretvornika nastavljena na vnaprej določeno hitrost v pripravljenosti, s katero pogon deluje, dokler nadzorna naprava ne ugotovi prisotnosti osebe; tedaj se hitrost osebne transportne naprave preko frekvenčnega pretvornika naravna na vnaprej določeno transportno hitrost, pogon pa se, potem ko je transportna hitrost dosežena oziroma če je vnaprej dano breme ali število oseb preseženo, preklopi na omrežje.The objective is achieved by a process in which the drive of the personal transport device is continuously engaged and the speed of the personal transport device via at least one frequency converter is set to a predetermined standby speed with which the drive operates until the control device detects the presence of the person; then the speed of the personal transport device through the frequency converter is adjusted to a predetermined transport speed, and the drive switches to the network after the transport speed is reached or if the load or number of persons is exceeded.

Nadaljnje prednosti predmeta izuma so razvidne iz podzahtevkov.Further advantages of the object of the invention can be seen in the sub-claims.

-2S pomočjo elektronskega krmiljenja je možno hitrost osebnih transportnih naprav, posebno tekočih stopnic oziroma tekočih stez, uravnavati odvisno od potrebe s pomočjo frekvenčnega pretvornika in izhajajoč iz vnaprej določene hitrosti v pripravljenosti. Pri tem odpadejo tokovni sunki in stroški za jalovi tok, še posebno glede na to, da frekvenčni pretvornik ni zasnovan glede na moč motoija, temveč je dimenzioniran za manjšo moč. Ukrepi izuma lahko zato zmanjšajo skupno porabo energije.-2 With the help of electronic control, the speed of personal transport devices, especially escalators or escalators, can be adjusted depending on the need with the help of a frequency converter and based on a predetermined speed in standby mode. This eliminates current surges and reactive power costs, especially since the frequency converter is not designed for moto power but is designed for lower power. The measures of the invention may therefore reduce the total energy consumption.

Pomanjkljivost poznanih in na drugih tehniških področjih uporabljenih tokovno krmiljenih frekvenčnih pretvornikov je v tem, da zaradi močnostnega vzbujanja pri njih nastopajo visoki jalovi tokovi. Pri napetostno krmiljenem pretvorniku po izumu je razmerje jalovega toka bistveno bolj ugodno, tako da lahko odpadejo stroški za jalov tok, na katere je sicer treba računati.A disadvantage of the known and other technical fields of use of current-controlled frequency converters is that they cause high reactive currents due to their power excitation. For a voltage-controlled converter according to the invention, the reactive current ratio is significantly more favorable, so that reactive current costs may be reckoned with.

Postopek po izumu je v nadaljnjem pobliže pojasnen s pomočjo diagrama poteka, kije prikazan na sliki 1.The process of the invention is further explained by the flowchart shown in Figure 1.

Diagram poteka prikazuje shemo vklopa za, na primer, pomične stopnice. V prvi fazi 1 se pomične stopnice vključijo in startajo. V drugi fazi 2 se hitrost pomičnih stopnic preko frekvenčnega pretvornika naravna na hitrost v pripravljenosti, v danem primeru na 0,2 m/s. Na tej hitrosti ostane pogon toliko časa, dokler se ne aktivira nadzorna naprava, na primer fotocelica 3, ki sproži nadaljnji potek. Če je signal fotocelice 3 pozitiven, se tekoče stopnice v fazi 4 preko frekvenčnega pretvornika naravnajo na normalno hitrost, na primer na 0,5 m/s. To stanje se zadrži toliko časa, dokler ni prekoračeno dano breme oziroma število oseb. Kriterij za prekoračitev bremena, kije lahko na primer slip pogonskega motoija, je določen s fazo 5. V fazi 6, to je ob prekoračitvi določenega bremena oziroma števila oseb, se pogon preklopi na omrežje.The flowchart shows the startup scheme for, for example, escalators. In Phase 1, the escalators are engaged and started. In the second phase 2, the speed of the escalator via the frequency converter is adjusted to the standby speed, if applicable to 0.2 m / s. At this speed, the actuator stays on until the control device is activated, for example, photocell 3, which triggers a further course. If the signal of photocell 3 is positive, the escalators in phase 4 are adjusted to the normal speed via the frequency converter, for example, to 0.5 m / s. This condition is maintained until the load or number of persons exceeded. The criterion for exceeding the load, which can be, for example, a slip of a motorcycle, is determined by phase 5. In phase 6, that is, when a certain load or number of persons is exceeded, the drive switches to the network.

V diagramu sta prikazana dva različna načina obratovanja. Pri obratovanju 7 je predviden en sam pogonski motor 8 v zvezdno-trikotni vezavi. Preklopu na omrežje pri tem najprej sledi prestava v obratovanje močnostno šibkejšega zvezdnega pogona 9. V odvisnosti od prekoračitve bremena oziroma števila oseb, ki se lahko uravnava preko slipa pogoskega motorja 8, se motor 8 preklopi iz zvezdnega pogona 9 na trikotni pogon 10.The diagram shows two different modes of operation. In operation 7, a single drive motor 8 is provided in star-triangular connection. Switching to the network is then followed by the start-up of a much weaker star drive 9. Depending on the overload or number of persons that can be controlled via the slip of the coil motor 8, the motor 8 switches from the star drive 9 to the triangular drive 10.

V drugi verziji 11 je predvidenih več pogonskih motoijev 12, ki se vklapljajo v omrežje oziroma izklapljajo iz omrežja v odvisnosti od bremena. Kriterij za priklop oziroma odklop je tudi tu lahko slip motoija oziroma motoijev.The second version 11 provides for multiple drive motors 12 that are connected to the network or disconnected from the network depending on the load. The criterion for connecting or disconnecting here can also be a slip of a moto or moto.

V obeh primerih se v fazi 13 motor vsakokrat preklopi na frekvenčni pretvornik, ko na tekočih stopnicah ni več nobenega uporabnika, v fazi 14 pa se hitrost uravna na obratovanje v pripravljenosti, v našem primeru na primer na 0,2 m/s.In both cases, in phase 13, the motor switches to the frequency converter each time when there is no longer any user on the escalator, and in phase 14 the speed is adjusted to standby, in our case, for example, 0.2 m / s.

-3Za varčevanje z energijo je frekvenčni pretvornik dimenzioniran samo na polovično pogonsko moč motoija, pri čemer je namesto tokovno krmiljenega frekvenčnega pretvornika, za katerega je značilen velik jalov tok, uporabljen napetostno krmiljen frekvenčni pretvornik. Izklop tekočih stopnic se izvrši pri hitrosti 0,2 m/s.-3In order to save energy, the frequency converter is only dimensioned to half the moto power, using a voltage-controlled frequency converter instead of a current-controlled frequency converter characterized by high reactive current. The escalator is switched off at a speed of 0.2 m / s.

Claims

Patent claims

1. A method for electronically controlling personal transport devices, such as escalators or escalators, characterized in that the drive of the personal transport device is switched on and the personal transport device is balanced via at least one frequency converter at a predefined standby speed as long as the control device does not detect the presence of persons and the personal transport device is adjusted to the predefined transport speed via the frequency converter and the drive switches to the network drive after reaching the transport speed or if the predefined load or number of persons is exceeded.

A method according to claim 1, characterized in that the frequency converter is not dimensioned appropriately by the power of the driving moto, but by a lower power, in particular by half the driving power of the moto.

Method according to claims 1 and 2, characterized in that the frequency converter is designed as a voltage-controlled converter.

Method according to Claims 1 to 3, characterized in that the drive motor is equipped with a star triangular linkage and that the drive motor is driven to a predetermined load first by a stellar drive and switches to triangular drive when the load or number of persons is exceeded.

Method according to claims 1 to 3, characterized in that it has several propulsion engines which are connected to the network or disconnected from the network according to the load or presence of persons.

Method according to Claims 1 to 5, characterized in that when reducing the load or the number of persons to a predetermined value, the network is switched back to the drive via the frequency converter and the speed of the personal transport device is set back to the operating speed in standby mode.