GB/T 21972.2-2023Technical specification for variable-frequency adjustable-speed three-phase induction motors for crane and metallurgical applications - Part 2: YZP series variable-frequency adjustable-speed three-phase induction motors for crane and metallurgical applications(cooled with axial fan)(frame size: 100~400) (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 for Standardization Documents" drafting.

This document is the second part of GB/T 21972 "Technical Conditions for Three-phase Induction Motors with Variable-Frequency Regulation for Hoisting and Metallurgy".

GB/T 21972 has issued the following parts.

--- Part 1. YZP series hoisting and metallurgy frequency conversion speed regulation three-phase asynchronous motor (frame size 100~400);

---Part 2. YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (cooled by axial flow fan) (frame size 100~ 400);

---Part 3. YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (cooled by centrifugal fan) (frame size 100~ 400).

This document replaces GB/T 21972.2-2012 "Technical Conditions for Three-phase Asynchronous Motors with Frequency Conversion and Speed Regulation for Hoisting and Metallurgy Part 2: YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (cooled by axial flow fan)", compared with GB/T 21972.2-2012, except Apart from structural adjustments and editorial changes, the main technical changes are as follows:

--- Added (frame number 100~400) to the file name (see cover page and Chapter 1);

--- Increase the motor model and example description (see 4.1);

--- Increased the protection level of the motor casing and junction box to IP55, and added "The protection level of the fan is IP54 (where the fan's outer The degree of protection of the cover is IP20)" (see 4.2);

---Changed part of the rated torque value (see Table 2, Table 2 of the 2012 edition);

--- Changed the constant torque frequency range from "2.5~50" Hz to "3~50" Hz (see Table 2, Table 2 of the 2012 edition);

---Changed the D pole of frame size 180L~400L in Table 3, frame size 180L~225M in Table 4, and frame size 180L~315M in Table 5 To limit the deviation, the D1 dimension of frame size 180L in Table 3~Table 5 has been changed, and the K base of frame size 160M~225M in Table 3 has been changed. For this size and position tolerance, the AD and HA dimensions in Table 3 have been added, and the frame size 100L~225M in Table 4 and the machine size in Table 5 have been changed. For S basic dimensions and position tolerances of seat sizes 100L~280M, Table 4 for frame sizes 100L~225M and Table 5 for frame sizes are added T limit deviation of 100L~315M (see Table 3~Table 5, Table 3~Table 5 of the 2012 edition);

--- Changed the limit deviation of bond width (see Table 6, Table 6 of the 2012 edition);

--- Added "The deviation of any phase of the DC resistance of the three-phase stator winding of the motor in the actual cold state and the average value of the three phases should not exceed ±2% of the average value" (see 5.9);

--- Added "cold insulation resistance value should not be lower than 5M ohm" (see 5.10);

--- Added 1s withstand voltage test (see 5.13);

--- Changed the inter-turn impulse withstand voltage test requirements (see 5.14, 4.14 of the 2012 edition);

--- Changed the requirements for motor vibration (see 5.17, 4.17 of the 2012 edition);

--- Changed the requirements for motor noise (see 5.18, 4.18 of the 2012 edition);

--- Added "The grounding terminal should not be used for other purposes except for protective grounding" (see 5.20);

--- Increase the appearance and assembly quality requirements of the motor (see 5.24);

--- Increased the test of motor routine items (see 5.25);

--- Express the inspection rules in tabular form (see Chapter 7, Chapter 5 of the 2012 edition);

--- Increase the "cooling method" item, change the "rated frequency" to "reference frequency" (see 8.2, 7.2 of the 2012 edition);

--- Added relevant requirements for cooling fans (see 4.5, 8.4).

Introduction

YZP series hoisting and metallurgical frequency control three-phase asynchronous motors belong to hoisting metallurgical motors, used to drive various hoisting machinery, with It has high overload capacity and mechanical strength. With the rapid development of electronic technology and computer technology and the need to save energy, frequency control Technology has developed unprecedentedly, product categories have increased continuously, output has increased sharply, and the scope of application has expanded day by day, not only in industry, but also in business and It is widely used in other fields. GB/T 21972 aims to provide three-phase asynchronous motors with frequency conversion and speed regulation suitable for hoisting and metallurgy The product standard, standardizes and guides the production and acceptance of variable frequency speed regulation three-phase asynchronous motors for hoisting and metallurgy, according to the cooling method of the product The difference consists of 3 parts.

--- Part 1. YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (frame size 100~400). purpose is to Technical requirements for self-cooled or self-fan-cooled three-phase asynchronous motors with variable frequency speed regulation for metallurgy and self-cooling powered by fixed frequency converters.

---Part 2. YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (cooled by axial flow fan) (frame size 100~ 400). The purpose is to determine the frequency conversion and speed regulation three-phase asynchronous motor used in the axial flow fan cooling lifting and metallurgy powered by the frequency converter. skills requirement.

---Part 3. YZP series hoisting and metallurgical frequency conversion speed regulation three-phase asynchronous motor (cooled by centrifugal fan) (frame size 100~ 400). The purpose is to determine the frequency conversion and speed regulation three-phase asynchronous motor for lifting and metallurgical use of the centrifugal fan cooling type powered by the frequency converter skills requirement.

1 Scope

This document specifies the frequency conversion speed regulation three-phase asynchronous motor (cooled by axial flow fan) of YZP series hoisting and metallurgy (frame size 100~ 400) type, basic parameters and dimensions, technical requirements, test methods, inspection rules, signs, packaging and warranty period.

This document is applicable to all kinds of hoisting machinery and metallurgical auxiliary equipment powered by frequency converter and axial flow fan cooling three-phase asynchronous motor Motive (frame size 100~400).

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, 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 Packaging, storage and transportation icon marks

GB/T 755 Rating and performance of rotating electrical machines

GB/T 756 Cylindrical shaft extension of rotating electrical machines

GB/T 757 Conical shaft extension of rotating electrical machines

GB/T 997 Classification of structural types, installation types and terminal box positions of rotating electrical machines (IM code)

GB/T 1096 Common Type Flat Keys

GB/T 1958 Product Geometric Specifications (GPS) Geometric Tolerance Testing and Verification

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

GB/T 1993 Cooling methods for rotating electrical machines

GB/T 2423.4 Environmental testing for electric and electronic products - Part 2: Test method Test Db. Alternating damp heat (12h 12h cycle)

GB/T 4772.1 Dimensions and output power levels of rotating electrical machines Part 1: Frame size 56~400 and flange size 55~1080

GB/T 4942 Degree of protection (IP code) for the overall structure of rotating electrical machines Classification

GB/T 10068 Measurement, evaluation and limit value of mechanical vibration of motor with shaft center height of 56mm and above

GB/T 10069.1 Measurement methods and limits of noise of rotating electrical machines - Part 1: Measurement methods of noise of rotating electrical machines

GB/T 10069.3 Measurement methods and limits of noise of rotating electrical machines - Part 3: Noise limits

GB/T 12351 Environmental technical requirements for tropical rotating electrical machines

GB 20237 Safety Requirements for Lifting Metallurgical and Shielded Motors

GB/T 22670 Test methods for inverter-powered three-phase cage induction motors

GB/T 22712 Technical specification for G series cooling fans for variable frequency motors

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

GB/T 22719.2 Inter-turn insulation of random-embedded windings of AC low-voltage motors Part 2: Test limits