GB/T 22671-2024Test methods for external-rotor motors (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 replaces GB/T 22671-2008 "Test methods for external rotor motors". Compared with GB/T 22671-2008, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows.

Deleted the vertical installation method and Figure 2 (see Chapter 3 of the 2008 edition); - Deleted "Test requirements" (see Chapter 4 of the 2008 edition), "Measurement" (see Chapter 5 of the 2008 edition) and "Test criteria" "Basic Requirements for Tests" (see Chapter 5) and "Test Preparation" (see Chapter 6 of the 2008 edition) were added.

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The temperature rise test method has been changed (see Chapter 8, Chapter 8 of the 2008 edition); - The test methods for stall torque and stall current have been changed (see Chapter 10, Chapter 10 of the 2008 edition); - The electric strength test method has been changed (see Chapter 13, Chapter 13 of the 2008 edition); - The turn-to-turn impulse withstand voltage test method has been changed (see Chapter 14, Chapter 14 of the 2008 edition); - The test method for noise determination has been changed (see Chapter 18, Chapter 18 of the 2008 edition); - Added test methods for protection level testing (see Chapter 20); - Added the test method for cogging torque (see Chapter 21); - Added test method for measurement of back electromotive force (see Chapter 22); - Added the test method for torque fluctuation (see Chapter 23); - Added the test method for maximum torque determination (see Chapter 24); - Added the test method for minimum torque determination (see Chapter 25). - Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

1 Scope

This document specifies the basic requirements for testing external rotor motors, describing no-load tests, temperature rise tests, efficiency and power factor tests.

Test methods for steady-state test, locked-rotor test and other test items.

This document applies to AC asynchronous/synchronous external rotor motors (hereinafter referred to as motors).

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document.

GB/T 755 Ratings and performance of rotating electrical machines

GB/T 4942-2021 Degrees of protection of rotating electrical machines as a whole (IP code) Classification

GB/T 5171.1 Small power motors Part 1: General technical requirements

GB/T 5171.21-2016 Small power motors Part 21: General test methods

GB/T 5171.22-2017 Small power motors Part 22: Test methods for permanent magnet brushless DC motors

GB/T 10068-2020 Mechanical vibration of motors with shaft center height of 56 mm and above - Measurement, evaluation and limits of vibration

GB/T 10069.1 Measurement methods and limits for noise from rotating electrical machines Part 1: Measurement methods for noise from rotating electrical machines

GB/T 12665 Requirements for damp heat tests on motors used under normal environmental conditions

3 Terms and definitions

The terms and definitions defined in GB/T 5171.21-2016 and the following apply to this document.

4 Installation methods and requirements