Masana a Muhimmiyar Tashin Kwado na VFD – Kwalbar Yawan Tsari Don Ingineeri
1). Maa yin da VFD, kuma maa yin da ta yi a cikin jirgin kawar da tsarin kashi?
Matar da take da sunan variable frequency drive (VFD), wanda ake kiran da adjustable-frequency drive (AFD), adjustable-speed drive (ASD), ko AC drive, ya kontrola ma'ana da tsari na zama na tashar kashi. VFD zai iya kontrola ramp-up da ramp-down na kashi a lokacin da ita faru da karkashin kashi.
VFDs suna nuna a jirgin kawar da ke gudanar da tashar kashi da kashi. An yi haɗa aiki a kan VFD don haɗa AC power zuwa DC power, kuma zai iya haɗa DC power zuwa AC power a ma'ana da tsari na aka son. Kashi zai ci a ma'ana na aka son saboda VFD an yi haɗa AC electricity zuwa shi.
Akwai masu aiki mai yawa da VFDs suna iya aikata a cikin jirgin kawar daban-daban don a yi aiki da kyau da inganci.
2). Bayyana aiki na biyuwar VFD
Variable frequency drive (VFD) shine wata motor controller wanda ke kontrola ma'ana da tsari na tashar kashi. Aiki na variable-frequency drive ta kasance a matsayin mutane da soft start ko soft stop features.
3). Maa yin da abubuwan VFD circuit da maa yin da su yi?
Abubuwan VFD circuit masu muhimmanci sun haɗa:
Rectifier: Wata alama wanda ke haɗa AC input voltage zuwa DC voltage.
DC bus: Babban capacitor bank wanda ke ƙunshi direct current voltage na rectifier.
Inverter: Wata alama wanda ke haɗa DC voltage zuwa alternating current voltage.
PWM controller: Wata alama wanda ke kontrola ma'ana da duty cycle na output voltage.
Filter: Yana cire high-frequency noise daga output voltage.
4). A nan da labaran da za suka samu a cikin aiki da VFDs a fannonin kontrola kashi?
VFDs suna bayar labaran da yawa a cikin fannonin kontrola kashi, kamar:
Efficiency na kashi
Enhanced process management
Diminished deterioration of the motor
Longer motor life
Reduced vibration and commotion (vibration)
Improved security
VFDs suna da aikin mai yawa da takam da za su iya amfani da su don bayar performance, efficiency, & dependability na jirgin kawar daban-daban.
5). Bayyana farkon da ke kuɗi vector control & V/f (Volts per Hertz) na VFDs.
| VFD Vector Control | VFD V/f Control |
| VFD vector control shine hanyar kontrola kashi mai yawa da V/f control. Yana amfani da feedback daga kashi don kontrola ma'ana da torque da kyau. Vector control ana amfani da shi a fannonin high-performance, high-accuracy kamar machine tools, robotics, & food and beverage processing. | VFD V/f control shine hanyar kontrola kashi mai adanku da kadan. Yana da shiga da voltage-to-frequency ratio mai adanku, wanda ke ƙunshi magnetic flux a cikin electric motor constant. V/f control ana amfani da shi a fannonin low-performance kamar fans & pumps. |
6). Maa yin da za su iya duba a kan VFD na fannonin aiki na musamman?
A nan da matakuza da za su iya duba a kan VFD na fannonin aiki na musamman:
Form na kashi wanda ke kontrola ya ba da VFD.
Motor power rating: Power rating na VFD ya kamata da (ko) mai yawan power rating na kashi.
Speed range: VFD ya kamata a iya bayar kashi da speed range na musamman.
Torque requirements: VFD ya kamata a iya bayar kashi da torque na musamman.
Duty cycle: VFD ya kamata a iya manage duty cycle na kashi.
Environmental conditions: VFD ya kamata a iya aiki a yanayi na yadda ake saka shi.
7). Maa yin da variable frequency drive (VFD) ya iya bayar a savings na kashi da protection?
VFD suna bayar a savings na kashi da protection daga:
Matching motor speed to load necessities: Za su iya cire 70% na energy consumption, yawanci a fannonin da load ya kunshi, kamar fans & pumps.
Reduced starting current: VFDs suna iya cire starting current da 80%, wanda ke zama da ya fi yawa life na kashi da cire electrical system wear and tear.
Overload protection, voltage spike protection, & other electrical problems: Za su iya cire kashi daga burn out, wanda ke zama da ya fi yawa time & money on repairs & replacements.
8). Maa yin da motor derating, & mune ne a matsayin muhimmiyar waɗannan a cikin aiki da VFD?
Motor derating shine hanyar cire rated power output na kashi. A cikin aiki da VFD, ya kamata a derate kashi saboda VFD zai iya buɗe kashi a cikin temperature mai yawa daga idan an yi aiki daga line.
Akwai abubuwan da za su iya tabbatar da amount na derating, kamar:
Types of motors
Type of VFD
Temperature na yamma
Duty cycle na kashi
Akwai abubuwan da za su iya bayar da motor derating a cikin aiki da VFD, kamar:
Don cire kashi daga overheating
Don fi yawa life na kashi
Don fi yawa dependability na kashi
Don cire possibility na failure na kashi
9). Bayyana masu aiki da (or) problems na VFDs da kuma maa yin da za su iya shafi su.
A nan da wasu masu aiki da (or) problems na VFDs:
Overheating: Idan VFD ba a yi ventilation daidai ko a yi aiki a cikin load mai yawa, zai iya overheat.
Ground faults: Ground failures zai iya faru idan VFD ba a yi grounding daidai (or) don da problem na wiring.
Noise and vibration: Idan VFD ba a yi placement daidai ko don da problem na kashi ko VFD itself, zai iya produce noise and vibration.
Tripping: Idan VFD detects ground fault, overload, or similar problem, it will trip.
