GB/T 12974-2012General specification for a. c. lift motor - Part 1: Three-phase asynchronous motor (English PDF)

Foreword

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

This document is Part 1 of GB/T 12974 "General Technical Conditions for AC Elevator Motors". GB/T 12974 has been released with Lower part.

---Part 1: Three-phase asynchronous motor;

---Part 2: Permanent magnet synchronous motor.

This document replaces GB/T 12974-2012 "General Technical Conditions for AC Elevator Motors". Compared with GB/T 12974-2012, except in addition to structural adjustments and editorial changes, the main technical changes are as follows.

---Deleted the permanent magnet synchronous motor product content (see 3.6, 4.4, 5.4, 6.3 of the 2012 edition);

---The expression of motor voltage and frequency requirements has been modified. The deviation of voltage and frequency from the rated value is in accordance with GB/T 755-2019 stipulations, no longer listed in detail (see 5.2, 4.3.1 of the 2012 version);

---Added efficiency requirements for single-speed asynchronous motors, in line with the minimum energy efficiency level regulations of GB 18613-2020 (see 6.1);

---Modified the expression of electrical performance guaranteed value tolerance (see 6.6, 4.3.2, 4.3.3, 4.3.4 of the 2012 edition);

---Added motor overspeed test (see 6.7);

--- Added provisions for the deviation of the DC resistance of any one phase of the three-phase stator winding in the actual cold state from the three-phase average value (see 6.18);

---Modified the thermal test requirements for electric motors (see 7.8, 5.3.4 of the 2012 edition);

---Modified the expression of motor inspection items (see 8.1, 5.3 of the 2012 edition);

---Modify the expression of the outlet terminal mark of the motor stator winding (see 9.1.3, 6.4 of the 2012 edition).

Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.

Introduction

With the current rapid development of social economy, elevators have become an indispensable vertical means of transportation in people's lives. Elevator technology is updated day by day with each passing month, the development speed is getting faster and faster. The elevator traction motor has the characteristics of frequent starting and braking, small starting current, and low operating noise.

There are two types of elevator motors. three-phase asynchronous motors and permanent magnet synchronous motors, which are the power source for elevator operation. GB/T 12974 aims to provide Provides general technical conditions for AC elevator motors, standardizes and guides the selection, design, manufacturing, promotion and application of AC elevator motors. According to product Due to different excitation methods, GB/T 12974 "General Technical Conditions for AC Elevator Motors" consists of two parts.

---Part 1: Three-phase asynchronous motor. The purpose is to determine the technical requirements for three-phase asynchronous motors for elevators.

---Part 2: Permanent magnet synchronous motor. The purpose is to determine the technical requirements of permanent magnet synchronous motors for elevators.

General technical conditions for AC elevator motors Part 1: Three-phase asynchronous motor

1 Scope

This document specifies the type, basic parameters and dimensions, general requirements, technical requirements, inspection rules, and standards of three-phase asynchronous motors for elevators.

logo, packaging and shelf life requirements, and describes the corresponding test methods.

This document is applicable to the manufacturing, design and inspection of three-phase asynchronous motors for various types of passenger elevators, freight elevators, medical elevators and home elevators.

Testing, etc., the manufacturing, design, testing, etc. of various series of motors derived from this series of motors shall be carried out with reference to this.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations for undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 191-2008 Packaging, storage and transportation pictorial markings GB/T 755-2019 Ratings and performance of rotating electrical machines GB/T 997-2022 Classification of structural types, installation types and junction box locations of rotating electrical machines (IM code) GB/T 1032-2012 Three-phase asynchronous motor test methods GB/T 1971-2021 Rotating motor wire end markings and direction of rotation GB/T 1993-1993 Cooling methods for rotating electrical machines GB/T 4772.1-1999 Dimensions and output power levels of rotating electrical machines Part 1: Frame number 56~400 and flange number 55~1080 GB/T 4942-2021 Protection level (IP code) of the overall structure of rotating electrical machines Classification GB/T 10068-2020 Measurement, evaluation and limits of mechanical vibration of motors with shaft center height 56mm and above GB/T 10069.1-2006 Determination methods and limits of noise of rotating electrical machines Part 1: Determination methods of noise of rotating electrical machines GB/T 12665-2017 Damp heat test requirements for motors used under general environmental conditions GB/T 14711 General safety requirements for small and medium-sized rotating electrical machines GB/T 22719.1-2008 Interturn insulation of scattered embedded windings of AC low-voltage motors - Part 1: Test methods GB/T 22719.2-2008 Interturn insulation of scattered embedded windings for AC low-voltage motors - Part 2: Test limits

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Type, basic parameters and dimensions