GB/T 22720.2-2019Rotating electrical machines - Qualification tests for the partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters (English PDF)

Foreword

GB/T 22720 is divided into 2 parts.

---GB/T 22720.1 Rotating motor voltage type inverter-powered rotating electric machine without partial discharge (type I) electrical insulation structure

Identification and quality control testing;

---GB/T 22720.2 Rotating electric machine voltage type inverter-powered rotating electric machine resistance to partial discharge electrical insulation structure (type II)

Identification test.

This part is the second part of GB/T 22720.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces GB /Z 22720.2-2013 "Rotating motor voltage-type inverter-powered rotating electric machine resistant to partial discharge electrical insulation

Structure (Type II) Identification and Accreditation Test. Compared with GB /Z 22720.2-2013, the main technical changes in this section are as follows.

--- Revised scope (see Chapter 1, Chapter 1 of the.2013 edition);

--- Modified the main insulation sample (see 12.2, 11.3 of the.2013 edition);

--- Modified the daytime sample (see 12.3, version 11.2 of the.2013 edition);

--- Modified the main insulation identification procedure (see 13.2, 12.3 of the.2013 edition);

--- Modified the inter-turn insulation identification procedure (see 13.3, 12.2 of the.2013 edition);

--- Modified the anti-halation structure identification procedure (see 13.4, 12.4 of the.2013 edition);

--- Revised the qualification criteria for qualification testing (see Chapter 14, Chapter 13 of the.2013 edition);

--- Revised the appendix "Example of Impact Test Circuit" (see Appendix B, Appendix A of the.2013 edition);

--- Added Appendix D "Derivation of the insulation level of motor insulation impulse voltage" (see Appendix D);

--- Added Appendix E "Derivation of IVIC in the absence of a manufacturer's baseline life curve" (see Appendix E).

This part uses the translation method equivalent to IEC 60034-18-42.2017 "Rotating Electric Machine Parts 18-42. Voltage Type Inverter Power Supply

Rotating electrical machine resistance to partial discharge electrical insulation structure (type II) qualification test.

The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.

--- GB/T 17948.3-2017 Rotating electrical machine insulation structure functional evaluation forming winding test procedures

Edge structure heat assessment and classification (IEC 60034-18-31.2012, IDT)

--- GB/T 17948.4-2016 Rotating electrical machines - Insulating structures - Functional assessment

Evaluation (IEC 60034-18-32.2010, IDT)

--- GB/T 20833.1-2016 Rotating electrical machine rotating machine stator winding insulation - Part 1.

(IEC TS60034-27.2006, IDT)

---GB/T 23642-2017 Electrical insulation materials and systems for transient rise and partial discharge under repeated surge voltage conditions

(PD) Electrical Measurement (IEC TS61934.2011, IDT)

---GB/T 29310-2012 Guidelines for statistical analysis of electrical insulation breakdown data (IEC 62539.2007, IDT)

For ease of use, this section has made the following editorial changes.

---Incorporate the contents of the International Standard Amendment;

--- In line with the existing series of standards, this part of the name is changed to "rotary motor voltage type inverter-powered rotary motor resistant to partial discharge

Identification test of electrical and electronic insulation structure (type II).

This part was proposed by China Electrical Equipment Industry Association.

This part is under the jurisdiction of the National Rotating Electric Machine Standardization Technical Committee (SAC/TC26).

This section drafted by. Shanghai Motor System Energy Conservation Engineering Technology Research Center Co., Ltd., Shandong Huali Electric Group Co., Ltd.

Division, Wolong Electric Nanyang Explosion Protection Group Co., Ltd., Xi'an Taifu Xima Motor Co., Ltd., Jiangsu Xi'anda Explosion Protection Co., Ltd.

Anhui Motor Products and Parts Quality Supervision and Inspection Center, CRRC Zhuzhou Motor Co., Ltd., CRRC Yongji Motor Co., Ltd., Shanghai De

Drive Chi Electric Co., Ltd., Harbin Electric Power Equipment Co., Ltd., Beijing Baizheng Chuangyuan Technology Co., Ltd., Hangzhou Jiangchao Motor Co., Ltd.

Division, Zhejiang Hulong Technology Co., Ltd., Shanghai Electric Group Shanghai Motor Factory Co., Ltd., Shanghai Electrical Equipment Testing Co., Ltd., Kazakhstan

Erbinda Electric Machinery Research Institute.

Introduction

"Inverter Structure of Rotating Motor Powered by Voltage Type Inverter" consists of two parts, and the insulation structure is divided into two categories. Type I and Type II.

Type I, does not withstand partial discharge during its operational lifetime and under specified conditions; Type II, any of the insulating structures throughout the operational life

Partially subjected to partial discharge. For Type I and Type II insulation structures, the power system integrator is responsible for coordinating the electrical performance of the complete powertrain system.

The motor manufacturer should inform the motor manufacturer of the terminal voltage that occurs during operation. At this time, the motor manufacturer will decide to apply for identification according to the severity.

Test of insulation structure. Insulated structure certified by IEC 60034-18-41 or IEC 60034-18-42 and powered by frequency converter

The impulse voltage insulation level can be derived. This indicates that the insulation can withstand the electrical stress generated by the inverter during operation. Severe grade base of type I structure

Impact rise time and peak-to-peak voltage. On this basis, the severity of the Type II structure is also affected by the surge voltage repetition rate and the fundamental voltage characteristics.

Impact. It is recommended that the system integrator measure the phase-to-phase and relative ground voltage between the terminal and the ground after the inverter/motor system is installed.

Check if it meets the requirements.

1 Scope

This part of GB/T 22720 specifies the supply of pulse width modulation (PWM) inverters that generate repeated surge voltages and during operation.

Evaluation criteria for stator/rotor winding insulation structures for single or multiphase AC motors subject to partial discharge. This section specifies a typical test

An electrical qualification test to verify the match with a voltage-type inverter. This section also describes the new rating system, which is a hierarchical system.

It specifies the limit of reliability of the insulation structure under the power supply conditions of the inverter.

Although this section applies to voltage-type inverters, there are other types of inverters that generate repeated surge voltages. For this type of change

The frequency converter can be tested in a similar manner.

Rotating motors that use voltage-type inverters only at start-up do not need to identify their insulation structure and are therefore outside the scope of this section.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 17948.7-2016 General rules for the functional evaluation of insulating structures for rotating electrical machines (IEC 60034-18-1.2010, IDT)

GB/T 22720.1-2017 Rotating electric machine voltage type inverter-powered rotating electric machine without partial discharge (type I) electrical insulation junction

Identification and quality control tests (IEC 60034-18-41.2014, IDT)

IEC 60034-1.2010 Rotating electrical machines - Part 1. Quantitative and performance (Rotating electrical machines - Part 1

Ratingandperformance)

Rotating electrical machines - Part 18-31. Functional evaluation of insulating structures

Thermal evaluation and classification of mechanical insulation structures (Rotating electricalal machines-Part 18-31. Functionalevaluationof

insulationsystems-Testproceduresforform-woundwindings-Thermalevaluationandclassification

Ofinsulationsystemsusedinrotatingmachines)

Rotating electrical machines - Part 18-32. Functional evaluation of insulating structures - s

(Rotatingelectricalmachines-Part 18-32. Functionalevaluationofinsulationsystems-Testproce-

Duresforform-woundwindings-Evaluationbyelectricalendurance)

IEC TS60034-27 Rotating electrical machines - Part 27. s.

lectricalmachines-Part 27.Off-linepartialdischargemeasurementsonthestatorwindinginsulation

Ofrotatingelectricalmachines)

IEC TS61934 Electrical Insulation Materials and Systems Partial Discharge (PD) Electrical Measurements with Instantaneous Rise and Repeated Impulse Voltage Conditions

Quantity [Electricalinsulatingmaterialsandsystems-Electricalmeasurementofpartialdischarges(PD)

Undershortrisetimeandrepetitivevoltageimpulses]

IEC 62539 Guidelines for the statistical analysis of electrical insulation breakdown data (Guideforthestatisticalanalysisofelecintricalsu-

Relationbreakdowndata)