GB/T 32891.2-2019 in English

VALID

Rotating electrical machines—Efficiency classes (IE-code)—Part 2: Variable speed AC motors

Issued on:2019-10-18
Implemented on:2020-05-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $340.00
$330.00

Standard No:	GB/T 32891.2-2019
Document status:	VALID
Title in English:	Rotating electrical machines—Efficiency classes (IE-code)—Part 2: Variable speed AC motors
Title in Chinese:	旋转电机效率分级（IE代码）第2部分：变速交流电动机
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2019-10-18
Implemented on:	2020-05-01
ICS Classification:	29.160.01-Rotating machinery in general
Chinese Classification:	K22-Asynchronous machine
Professional Classification:	GB-National Standard
Related Keywords:	variable speed ac motors variable speed ac motors introduction interpretation 0.12-1000kw variable speed electrical machines efficiency classes five-level energy efficiency system
Related Topics:	ie dsc primary conversion secondary conversion rotary converter Six-speed rotational rheometer Level one shift First-order and second-order transformations secondary transformation first order phase transition ie1 Motor efficiency Rheology rate Speed unit GB/T 32891.2 AC motor Motor efficiency rotating electrical machine electric motor Rotational rheological analysis IE 61304-2 Rotating flow field analysis

《GB/T 32891.2-2019旋转电机效率分级（IE代码）第2部分：变速交流电动机》由TC26（全国旋转电机标准化技术委员会）归口，主管部门为中国电器工业协会。

Introduction

Interpretation of the core content of the standard

This standard is equivalent to the IEC TS 60034-30-2:2016 international standard, which is specifically designed for variable speed AC motors. It complements GB/T 32891.1 (grid-powered motors) and together they form a complete IE code energy efficiency standard framework.

Scope and restrictions

Inclusion types	Exclusion types
• 0.12-1000kW variable speed motor • 50-1000V voltage range • Permanent magnet/reluctance synchronous motor • Induction motor for variable frequency	• Mechanical commutator motor • Integrated non-separable motor • Submersible/explosion-proof special motor • Servo drive motor

Key technical requirements

Energy efficiency grading system

The IE1-IE5 five-level energy efficiency system is adopted, with IE5 being the most efficient level. The test needs to be carried out at 90% of the rated speed, using the comparative inverter method specified in IEC TS 60034-2-3.

Key test parameters

Additional harmonic loss factor: 15% for ≤90kW, 25% for >90kW
Environmental reference temperature: 25±5℃
Altitude correction reference: 1000m

Typical application scenarios

In continuous operation equipment such as compressors and conveyor belts, selecting IE3 and above energy-efficient motors can achieve significant energy savings. However, it should be noted that the use of high-efficiency motors for short-time working equipment may increase energy consumption.

Implementation suggestions

Preferably use IE3/IE4 grade motors to meet national energy-saving requirements
High-power (＞90kW) equipment needs to pay special attention to the impact of harmonic losses
Use with IEC 61800-9-2 to evaluate the energy efficiency of the complete drive system

More samples: YD/T 3934-2021 JC/T 2453-2018 GB 50021-2001(2009)

Sample only — not a preview of GB/T 32891.2-2019