Akwụkwọ na Nsogbu Nke Mgbakwụnye N'ịkwalite Mmemme System
Akwụkwọ iji ọrụ Nsogbu Synchronous Magnet Ugbu a (PMSM) na Ikwupụta Nsogbu n'ịtụgharị Fiba Asụsụ Ọhụrụ na Nsọpụrụ
N'oge ọgụsị, enweghị mgbe enwere nsogbu magnet ugbu a site ịkọwa motor electric. Ụfọdụ mgbe ahụ, nke a bụ otu mgbe ụzọ ọhụrụ e ji anya ọrụ electronic, Nsogbu Synchronous Magnet Ugbu a (PMSMs) na converter frequency dị ka ọnụ ọhụrụ site ịkọwa system iji ọrụ open-loop, high-speed, high-precision ikwupụta nsogbu. Enwere mmadụ n'ime ọtụtụ ịtụgharị ndị ọhụrụ, ha na-enye ọrụ maka system iji ọrụ DC na electromagnetic slip speed control, pụtara ọrụ ọma.
Ọ bụ ozi kwesịrị na nsogbu PMSM na-eji ihe dịka ọnụ ọhụrụ na frequency na-ekwu. Ọ bụrụ na enweghị mfe ụzọ ọhụrụ frequency, nsogbu na-egosi ọrụ motor bụrụkwa nke ọma, ma na-egosi ọrụ mechanical dịka ọrụ line. Maka ọrụ, n'otu ụlọ ọrụ, abụọ ọrụ synchronous site ọṅụkarị ekwesịrị n'ụbọchị ọhụrụ, na onwe ha na-egosi ọrụ nsogbu nke ọma.
Ụfọdụ mgbe converter frequency na-egosi ọrụ frequency dịka 1.0‰ - 0.1‰, ma ọ bụ dị ọhụrụ, ọrụ system na-egosi ọrụ nsogbu dị ọhụrụ. Ụfọdụ mgbe, system na-egosi ọrụ component dị ọhụrụ, ma na-egosi ọrụ circuitry dị ọhụrụ n'ọtụtụ ọtụtụ ịtụgharị. Kama, PMSMs na-egosi ọrụ dịka high power factor, high efficiency, energy savings, compact size, being brushless, na ọrụ safety na reliability. Ya mere ọ bụla na-enye ọrụ maka ọtụtụ ịtụgharị. Ụfọdụ mgbe, ha na-enye ọrụ maka winding, stretching, metering, na godet roller applications n'ịtụgharị fiba asụsụ ọhụrụ; na applications n'annealing furnaces maka flat glass, glass furnace stirring, edge rollers (ma ọ bụ "pullers"), na bottle-forming machines n'ịtụgharị nsọpụrụ.
Akwụkwọ iji ọrụ PMSM Variable Frequency Speed Control n'ịtụgharị Fibre Chemical
System PMSM variable frequency speed control na-egosi ọrụ maka melt-spinning machines maka fibres chemical, dịka ọ bụ na diagram system (Figure 12-1). Metering pump drive motor n'ọrụ spinning na-egosi ọrụ PMSM, na-egosi ọrụ precise speed output maka ọrụ quantitative supply maka solution fiba asụsụ ọhụrụ, na-egosi ọrụ maka ọrụ spinning process. Ọ bụrụ na enweghị mfe ọrụ fiba product, ọ bụrụ na-egosi ọrụ speed nke metering pump drive motor na-egosi ọrụ maka ọrụ process.
Power nke main metering pump na-egosi ọrụ 0.37 kW site 11 kW, motors na-egosi ọrụ 4 ma ọ bụ 6 poles. Frequency variation range na-egosi ọrụ 25 Hz site 150 Hz. Ụfọdụ mgbe, enweghị mfe converter frequency maka ọrụ multiple motors, ma ọ bụ dedicated systems (one converter per motor) na-egosi ọrụ, ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ ọtụtụ......
Akwụkwọ iji ọrụ PMSM Variable Frequency Speed Control n'ịtụgharị Nsọpụrụ
System variable frequency speed control maka main drives maka float glass annealing furnaces na-egosi ọrụ maka ọtụtụ ọtụtụ production lines n'China, na-enye ọrụ maka original DC drives na-egosi ọrụ satisfactory economic benefits.
Float glass production line na-egosi ọrụ high-temperature glass liquid na-egosi ọrụ site melting furnace, gradually cooling down along the line. After solidifying, the glass undergoes heat treatment in the annealing furnace before proceeding to the cold end for cutting, inspection, packing, and other downstream processes. The annealing furnace process imposes stringent requirements; over its approximately 200-meter length, every roller must operate continuously and uniformly. Stoppages are absolutely unacceptable, as they would cause significant economic losses.
For this application, a TYB100-8 three-phase rare-earth PMSM paired with a Fuji G5 frequency converter was selected. This system has operated continuously and safely for tens of thousands of hours and received acclaim from all sides. Its main advantages are:
- High Speed Precision (up to 0.4%): Ensures product thickness tolerances, saves raw materials, and yields obvious economic benefits.
- High Reliability: Reduces maintenance workload.
- Energy Saving: Due to fewer system components and the motor's inherent high efficiency.
- Compact and Lightweight Design: The equipment is smaller and lighter.
Stirrers within glass melting furnaces previously used DC drives. However, considering the high-temperature environment and maintenance challenges, variable frequency speed control systems have been adopted since 1995. Specifically, two TYB400-8 motors are employed for this purpose. The operational requirements are as follows:
The two motors drive their respective stirrers, agitating the glass solution within the high-temperature furnace. To ensure mixing uniformity, "dead zones" inside the furnace bath are not permitted. Therefore, the working areas of the two stirrers must overlap slightly, yet be arranged so that the rotating paddles do not collide. A schematic of the working area is shown in Figure 12-2.
If the rotational speeds n1 and n2 differ, their cumulative effect could eventually lead to collisions between the stirrer paddles. Long-term practical application of this system has demonstrated no paddle collisions, confirming that the speed precision meets the requirements.
The application of variable frequency speed control on edge rollers (or "pullers") has also yielded excellent results. On the glass production line, as the molten glass gradually transforms from a liquid state to a plastic semi-solid state, it needs to be stretched and flattened into a plane. Edge rollers perform this crucial function. Their drive motors must offer continuously variable, stepless speed control. The speed of each puller motor should be pre-set based on factors such as the working point temperature and glass type. This demands excellent control system performance: wide speed range, high speed precision, and good dynamic response. Therefore, the existing Z₂-12, 0.6 kW, 1500 r/min DC motor speed control system was replaced with TYB500-6, 125 V, 50 Hz three-phase PMSMs. The frequency converter operates over a range of 10 Hz to 150 Hz, providing a motor speed range of 200 r/min to 3000 r/min. Replacing DC motors with synchronous motors offers advantages including higher production automation, superior quality, lighter weight, and easier centralized control.
