GB/T 27744-2021Specification and energy efficiency grades for line-start permanent magnet synchronous motors (frame size 80～355) (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 27744-2011 "Technical conditions for ultra-efficient three-phase permanent magnet synchronous motors (frame size 132~280)", and Compared with GB/T 27744-2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

---Added the composition and example of the motor model (see 4.1);

---The power type spectrum is changed, the power range is expanded from 2.2kW~55kW to 0.55kW~315kW (see 4.7, 2011 edition Of 3.6);

---Changed the relationship between the frame number of the motor and the speed and power, the schematic diagram of the motor installation size and the size symbol (see Table 1~Table 5,

Figure 1~Figure 4, 2011 version of Table 1~Table 5, Figure 1~Figure 4);

---The motor efficiency index has been changed and the energy efficiency classification has been added (see 5.4, Table 12, and 4.4 in the 2011 edition, Table 12);

---Changed the power factor of the motor (see 5.5, 4.5 in the 2011 edition);

---Changed the parameters of the motor such as locked-rotor, out-of-step torque multiples, locked-rotor current multiples, etc. (see 5.6, 5.7, 5.8, and 4.6 of the 2011 edition 4.7, 4.10);

---Deleted the minimum torque of the motor regulations (see 4.9, 4.11, 5.4 in the 2011 edition);

--- Changed the vibration intensity limit (see 5.17, table 18, 4.19, table 17 of the 2011 edition);

---Changed the motor noise limit (see 5.18, Table 19, 4.20, Table 18 in the 2011 edition);

---The deviation of the three-phase DC resistance of the motor from the average value has been increased (see 5.19);

---Added the provisions of the three outlet ends of the motor (see 5.22, 8.3, 4.24, 6.3 in the 2011 edition);

--- Increase the content of mechanical inspection, and the inspection items are given in a list (see 7.1, Table 20, Chapter 5 of the 2011 edition).

1 Scope

This document specifies the type, basic parameters and dimensions, technical requirements, energy efficiency classification, test methods, Requirements for inspection rules, markings, packaging and warranty period.

This document is applicable to asynchronous starting three-phase permanent magnet synchronous motors (frame size 80~355) (hereinafter referred to as electric motors). Stipulated in this document The motor rotor has a cage-type starting winding. All series of motors derived from this series of motors can also be implemented by reference.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 191-2008 Graphical signs for packaging, storage and transportation

GB/T 755-2019 Rotating electric machine rating and performance

GB/T 997-2008 Classification of structure type, installation type and junction box position of rotating electric machine (IM code)

GB/T 1971 Rotating motor wire end marking and direction of rotation

GB/T 1993-1993 Rotating electric machine cooling method

GB/T 4772.1-1999 Rotating electric machine size and output power level Part 1: Frame size 56~400 and flange number 55~1080

GB/T 4831-2016 Rotating electric machine product model compilation method

GB/T 4942-2021 Protection level (IP code) classification of the overall structure of rotating electrical machines

GB/T 10068-2020 The measurement, evaluation and limits of mechanical vibration of motors with a shaft center height of 56mm and above

GB/T 10069.1-2006 Rotating electrical machine noise measurement method and limit value Part 1: Rotating electrical machine noise measurement method

GB/T 12665-2017 Damp heat test requirements for motors used under general environmental conditions

GB/T 14711-2013 General safety requirements for small and medium rotating electrical machines

GB/T 22669-2008 Three-phase permanent magnet synchronous motor test method

GB/T 22719.1-2008 Inter-turn insulation of scattered windings of AC low-voltage motors Part 1: Test methods

GB/T 22719.2-2008 Interturn insulation of random windings of AC low-voltage motors Part 2: Test limits

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Type, basic parameters and dimensions

4.1 The motor model consists of two parts, the product code and the specification code, arranged in sequence (according to the provisions of GB/T 4831-2016).