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dc motor speed control system

Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

  Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

 

'Musisi oa DC ke sesebelisoa sa ho lokisa lebelo la makoloi a DC. Karolo e kaholimo e hokahane le phepelo ea motlakase ea AC, pheletso e tlase e hokahane le enjene ea DC, mme molaoli oa DC o fetola matla a AC hore e be lisebelisoa tse peli tsa motlakase oa DC, kenyelletso e le ngoe ho DC motor neodymium (stator), tsela eohle Ho kenya letsoho ho DC motor armature (rotor), 'musisi oa DC o fetola lebelo la makoloi a DC ka ho laola matla a DC a matla.   Ts'ebeliso ea dc motor control system. Ka nako e ts'oanang, makoloi a DC a fana ka maikutlo ho 'musisi hajoale. 'Musisi o khetha lebelo la makoloi a DC ho latela maikutlo a hona joale. Haeba ho hlokahala, tlhahiso ea motlakase e lokisoa ho lokisa lebelo la makoloi hape.

Morero oa taolo ea lebelo la makoloi a DC ka kakaretso o na le mekhoa e meraro e latelang:

1. Fetola armature voltage;
2. Fetola nyakallo matsoelintsoeke gagamalo;
3. Fetola armature loop loop.

Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

  Ts'ebeliso ea dc motor control system. Ho sebelisa microcomputer ea chip e le 'ngoe ho laola phetoho ea enjene ea DC, ka kakaretso e sebelisa mokhoa oa ho fetola matla a motlakase, PWM1 le PWM2 li laoloa ke microcomputer ea single-chip ho hlahisa pulse e feto-fetohang, e le hore matla a motlakase a tsamaee e boetse ke pulse voltage e nang le bophara bo fapaneng. Ho latela foromo

U = aVCC

  Ts'ebeliso ea dc motor control system. Moo: U ke matla a motlakase; a ke potoloho ea mosebetsi oa pulse (0 <a <1); Mohloli oa motlakase oa VCC DC, mona 5V.

Sesebelisoa sa motlakase sa motlakase se laoloa ke sekhahla sa "single-chip microcomputer", 'me phetoho ea makoloi a DC e bonoa ke theknoloji ea pulse length module (PWM).

Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

Hobane ho potoloho ea H-Bridge, enjene e ka tsamaisoa feela ha maemo a PWM1 le PWM2 a loantšana, ke hore, ha PWM1 le PWM2 li phahame kapa li le tlase, li ke ke tsa sebetsa, ka hona bophara ba 'mele bo holimo kaholimo palo. Bakeng sa B,

  Ts'ebeliso ea dc motor control system. Re behile nako ea leqhubu la PWM hore e be 1ms, 'me potoloho ea mosebetsi e ka fetoloa ka mehato e 100 (phapang lipakeng tsa boemo ka bong ke 10%), hore selekanyi sa nako T0 se hlahise selekanyi se sitisa li-0.01ms tsohle,' me se kenelle ho potoloho ea PWM e latelang makhetlo a 100 ka linako tsohle. Setšoantšong se kaholimo, potoloho ea mosebetsi ke 60%, ke hore, sekhahla sa phallo ke 0.6ms, 'me pulse e tlohang ke 0.4ms, ka hona, matla a li-armature ke 5 * 60% = 3V.

Re bua ka ho fetela pele le ho khutlisa.   Ts'ebeliso ea dc motor control system. Haeba re leba nqa e le 'ngoe feela, re hloka feela ho beha PWM1 boemong bo phahameng kapa bo tlase, ebe re fetola feela phetoho ea pulse ea boemo bo bong ba PWM2, joalo ka ha ho bonts'itsoe ka tlase. Q4 e buletsoe, Q3 e koetsoe, enjene e ka fetola lebelo la potoloho ka ho le letšehali)

Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

Kamora ho hlahloba le ho bua ka boqapi ba mong'a ntlo, taolo ea makoloi a tsamaeang ka lebelo la microcomputer e le 'ngoe e qetella e phethetsoe,' me ho potoloha ha nako ea nnete le ho khutlisa, ho potlakisa le ho fokotsa motlakase o kenang.

     Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc   Ha e le molao-motheo o sebetsang oa motor stepper, ke lumela hore batho ba bangata ba se ba ntse ba tseba hore nako ena ke mohato oa mekhahlelo e mene, o sebelisang mekhahlelo e mene ea mekhahlelo e robeli, e leng: A-AB-B-BC-C- CD-D -DA-A

Ts'ebeliso ea ts'ebetso ea taolo ea motor motor dc

Taolo ea lebelo la makoloi a DC e ka aroloa ka mokhoa oa ho laola nyakallo le mokhoa oa ho laola matla a motlakase. Taolo ea nyakallo e sebelisoa hanyane, 'me taolo ea matla a matla e sebelisoa lits'ebetsong tse ngata.   Ts'ebeliso ea dc motor control system. Ka nts'etsopele ea mahlale a motlakase oa motlakase, ho fetola li-voltage tsa armature ho ka fihlelleha ka litsela tse fapaneng, tseo har'a tsona phallo ea molumo oa bophara (PWM) e leng mokhoa o sebelisoang khafetsa oa ho fetola matla a motlakase. Mokhoa ke ho fetola li-voltage tsa armature tsa U tsa makoloi a DC ka ho fetola karolelano ea nako ea motlakase oa motlakase ho isa nakong ea matlafatso (ke hore, karolelano ea mosebetsi), ka tsela eo o laola lebelo la makoloi.

 

  Ts'ebeliso ea dc motor control system. Jenereithara ea maqhubu a likhutlo e meraro e sebelisetsoa ho hlahisa maqhubu a likhutlo tse tharo UT ea maqhubu a itseng, a eketsoang ke keketso ho lets'oao la taelo la ho kenya UI ho hlahisa lets'oao la UI UT, le romeloang ho papiso. Mohlahlobi ke op amp e sebetsang sebakeng se bulehileng se nang le phaello e phahameng haholo le ho fokotsa litšobotsi tsa ho chencha. Phetoho e fokolang phapanong ea lets'oao lipakeng tsa lisebelisoa tse peli e etsa hore sebapatsi se hlahise lets'oao le lumellanang. Ka kakaretso, kenyelletso e mpe ea papiso e thehiloe 'me lets'oao la UI UT ke kenyelletso e tsoang setsing se setle. Ha UI UT> 0, sebapali se hlahisa boemo bo nepahetseng ba molumo o felletseng; ha UI UT0, sebapali se hlahisa boemo bo fosahetseng ba molumo o felletseng.  Ts'ebeliso ea dc motor control system.

Ts'ebetso ea modulation ea waveform ea signal ka converter ea voltage-pulse width e bonts'oa ho Setšoantšo sa 2. Ka lebaka la litšobotsi tse fokolang tsa se bapisi, bophahamo ba lets'oao la tlhahiso ea US ha bo fetohe, empa bophara ba pulse bo fapana le UI. Maqhubu a US a khethoa ke maqhubu a leqhubu le likhutlo li tharo.

Ha taelo ea taelo UI = 0, pontšo ea tlhahiso ea US ke pulse e likhutlo li 'ne e nang le bophara bo lekanang bo nepahetseng le bo fosahetseng ba pulse length. Taba ea mantlha, lets'oao la taolo ea makoloi le fanoa ke microcomputer e le 'ngoe ea chip, haholo ho kenyelletsa le lets'oao la motor dir le tataisang Dir, lebelo la makoloi le laolang PWM le lets'oao la braking motor. Modulse bophara ba pulse length bo etsoa ke TL 494, 'me lets'oao la eona la tlhahiso le tsamaisa potoloho ea matla ea H-Bridge ho khanna motlakase oa DC.   Ts'ebeliso ea dc motor control system. Borokho ba H bo entsoe ka li-FET tse 'ne tse ntlafalitsoeng ka matla a holimo, tse sebetsang ho fetola botsamaisi ba enjene le ho holisa lets'oao la ho khanna.

Potolohong e hlokomelang taolo ea PWM ea enjene, sistimi e sebelisa chip ea TL494, 'me potoloho ea eona e kahare e entsoe ka potoloho ea motlakase ea motlakase, potoloho ea oscillation, potoloho ea nako ea likhaohano, li-amplifiers tse peli tsa liphoso, pulse bophara ba modulation comparator le potoloho ea sehlahisoa, jj. TL494 chip e sebelisoa haholo ho sebelisoa habeli-pele, habeli-borokho, phepelo ea motlakase e felletseng.   Ts'ebeliso ea dc motor control system. Lisebelisoa tsohle tsa ho feto-fetoha ha molumo oa motlakase li kopantsoe. The chip e na le e hahiloeng ka guttate sakhao oscillator le dikarolo tse peli feela kantle oscillating (resistor 'ngoe le capacitor' ngoe). Sesebelisoa sa phoso se kentsoeng. Ka hare e hana mohloli oa voltage oa 5V. Nako ea ho shoa e ka fetoloa. Transistor ea motlakase e hahelletsoeng e fana ka bokhoni ba ho khanna ba 500mA. Sututsa kapa hula mekhoa e 'meli ea tlhahiso.

 

Ka litumeliso tse molemo,
 
Lee (Lefapha la Thekiso; Mofumahatsana.)         
NER GROUP CO., LIMITED    
Yantai Bonway Moetsi Co., Ltd.                        
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