GB/T 12974.2-2023 English PDF (GBT12974.2-2023)

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GB/T 12974.2-2023: General specification for a. c. lift motor - Part 2: Permanent magnet synchronous motor
GB/T 12974.2-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.30
CCS K 21
Replacing GB/T 12974.2-2014
General Specification for a.c. Lift Motor - Part 2:
Permanent Magnet Synchronous Motor
ISSUED ON: SEPTEMBER 7, 2023
IMPLEMENTED ON: APRIL 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Types and Basic Parameters ... 7
5 General Requirements ... 8
6 Technical Requirements ... 8
7 Test Methods ... 12
8 Inspection Rules ... 14
9 Marking, Packaging and Warranty Period ... 16
General Specification for a.c. Lift Motor - Part 2:
Permanent Magnet Synchronous Motor
1 Scope
This document specifies the types and basic parameters, general requirements, technical
requirements, inspection rules, marking, packaging and warranty period requirements of
permanent magnet synchronous motor for lifts, and describes the corresponding test methods.
This document is applicable to the manufacturing of permanent magnet synchronous motors
for various passenger lifts, freight lifts, medical service lifts and home lifts. The manufacturing
of various series of motors derived from this series of motors shall take this as a reference.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in this text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 191-2008 Packaging - Pictorial Marking for Handling of Goods
GB/T 755-2019 Rotating Electrical Machines - Rating and Performance
GB/T 997-2022 Classification of Types of Construction, Mounting, Arrangements and Terminal
Box Position (IM Code) for Rotating Electrical Machines
GB/T 1971-2021 Rotating Electrical Machines - Terminal Markings and Direction of Rotation
GB/T 1993-1993 Cooling Methods for Rotating Electrical Machines
GB/T 4772.1-1999 Dimensions and output series for rotating electrical machines - Part 1:
Frame numbers 56 to 400 and flange numbers 55 to 1080
GB/T 4942-2021 Degrees of Protection Provided by the Integral Design of Rotating Electrical
Machines (IP code) - Classification
GB/T 10068-2020 Mechanical Vibration of Certain machines with Shaft Heights 56 mm and
Higher - Measurement, Elevation and Limits of Vibration Severity
GB/T 10069.1-2006 Measurement of the Airborne Noise Emitted by Rotating Electrical
Machines and the Noise Limits - Part 1: Method for the Measurement of Airborne Noise
Emitted by Rotating Electrical Machines
GB/T 12665-2017 Requirements of Damp-heat Testing of Electrical Machine for Service in
General Environmental Condition
GB/T 14711 Safety Requirements of Small and Medium Size Rotating Electrical Machines
GB/T 22669-2008 Test Procedures for Three-phase Permanent Magnet Synchronous Machines
GB/T 22719.1-2008 Interturn Insulation of Radom-wound Winding for AC Low-voltage
Electrical Machines - Part 1: Test Methods
GB/T 22719.2-2008 Interturn Insulation of Random-wound Winding for AC Low-voltage
Electrical Machines - Part 2: Test Limits
3 Terms and Definitions
This document does not have terms or definitions that need to be defined.
4 Types and Basic Parameters
4.1 Types
4.1.1 The protection degree provided by the enclosure of permanent magnet synchronous motor
for lifts (hereinafter referred to as the motor) is IP20 or IP54 in accordance with the stipulations
of GB/T 4942-2021.
4.1.2 The cooling method for the motor shall be IC00, IC01 or IC06 in accordance with the
stipulations of GB/T 1993-1993.
4.1.3 The structure and mounting type of the motor shall be IM B3, IM B5 and IM B35 in
accordance with the stipulations of GB/T 997-2022.
4.2 Basic Parameters
4.2.1 The motor shall operate in an intermittent cycle (S5). The number of starts per hour can
be divided into 120 times/h and 180 times/h in accordance with the different requirements of
the lifts. The load sustained rate of the motor shall be 15%, 40%, 50% or 60%.
4.2.2 The rated voltage of the motor frequency conversion device shall be 380 V, and the rated
frequency shall be 50 Hz.
4.2.3 The number of poles of the motor is divided into 6 poles, 8 poles, 10 poles, 12 poles, 16
poles, 20 poles, 24 poles, 32 poles and 48 poles.
4.2.4 The motor shall be manufactured in accordance with the following rated powers: 0.55 kW,
0.75 kW, 1.1 kW, 1.5 kW, 2.2 kW, 3 kW, 4 kW, 5.5 kW, 7.5 kW, 11 kW, 15 kW, 18.5 kW, 22
kW, 25 kW, 25 kW, 30 kW, 37 kW, 45 kW, 55 kW, 75 kW, 90 kW, 110 kW.
4.2.5 When the motor is operating at the rated speed, the rated torque and rated power shall be
converted in accordance with Formula (1):
Where,
TN---the rated torque of the motor, expressed in (N  m);
P2---the rated power of the motor, expressed in (kW);
nN---the rated speed of the motor, expressed in (r/min).
5 General Requirements
5.1 Under the following altitude and ambient air temperature conditions, the motor shall be
capable of rated operation:
a) The altitude does not exceed 1,000 m;
b) The maximum ambient air temperature changes with the seasons, but does not exceed
40 C;
c) The minimum ambient air temperature is 5 C;
d) The ambient air does not contain corrosive and flammable gases;
e) The surrounding environment of the installation site does not affect the normal
ventilation of the motor.
Deviations in on-site operating conditions shall be corrected in accordance with the stipulations
of GB/T 755-2019.
5.2 The motor shall have three outlet terminals and grounding terminals. If the rated power
exceeds 100 kW, an additional grounding terminal shall be provided on the base, and a
grounding mark shall be set near the grounding terminal. It shall be ensured that this mark is
indelible during the entire period of use of the motor and shall not be placed on removable parts.
The design of the grounding terminal shall ensure a good connection with the grounding
conductor without damaging the conductor or terminal.
5.3 The encoder (if any) of the motor shall have anti-interference shielding and mechanical
protection.
6 Technical Requirements
6.1 When the power, voltage and frequency of the motor are rated, the guaranteed value of its
9 Marking, Packaging and Warranty Period
9.1 Marking
9.1.1 The material of the nameplate and the method of data marking on the nameplate shall
ensure that the writing is indelible during the entire usage of the motor.
9.1.2 The nameplate shall be fixed on the upper half of the motor frame, and the items that shall
be marked are as follows:
a) Manufacturer’s name or mark;
b) Motor name (permanent magnet synchronous motor for lifts);
c) Motor model;
d) Enclosure protection degree (can be marked on another nameplate);
e) Rated torque, expressed in (N  m);
f) Rated power, expressed in (kW);
g) Rated frequency, expressed in (Hz);
h) Rated current, expressed in (A);
i) Rated voltage, expressed in (V);
j) Rated speed, expressed in (r/min);
k) Thermal classification;
l) Wiring method;
m) Efficiency;
n) Year and month, and serial No. of manufacturer’s production;
o) Mass, expressed in (kg); <...