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Crc Press Mechatronics Handbook 2002 By Laxxuss Episode 3 Part 14

Tham khảo tài liệu 'crc press mechatronics handbook 2002 by laxxuss episode 3 part 14', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TABLE 34.2 Input Values of 5.5 kW 380 V Motor Quantity Name Symbol Dimension Value Nominal power output Pn W 5500 Nominal voltage Uin V 380 Required power factor cosj 0.81 Required efficiency n 0.86 Grid frequency f Hz 50 Motor axis height H mm 132 Number of pole pairs p 3 Temperature class of insulation TT F Torque overload capacity mp 2 where kV is the volume weight coefficient k is the temperature factor weight coefficient kcosv is the power factor weight coefficient kh is the efficiency weight coefficient kmp is the torque overload capacity weight coefficient. Achieved Results 5.5 kW 380 V Motor Design Description During program development and tuning an optimization was performed on the motor described in Table 34.2. In this section we describe the results and problems encountered in the optimization process. The symbols and quantities which are not explained in detail were either used in the previous text or are listed at the list of used quantities at the beginning of the document. The motor input parameters are given in Table 34.2. Other Results It follows from the physical principle that optimized quantities are closely related. Increase of a gain of one quantity results in a disadvantage of the quantities. Based on the performed optimizations it can be concluded that two kinds of motors exist depending on the content of iron and copper 1. Motor with prevailing iron content high stator current density good power factor for a price of worse efficiency of the motor and with slightly worse torque overload capacity than the second motor. 2. Motor with high copper content and conversely low stator current density good efficiency and worse power factor value. Torque overload capacity is good. The type of motor is determined based on the setting of gain coefficients. A sum of temperature and power factor errors on one side impacts the sum of volume and efficiency errors on the other side. The torque overload capacity can be good for both kinds of motors. Results