GB 30253-2024 Minimum allowable values of energy efficiency and energy efficiency grades for permanent magnet synchronous motors
1 Scope
This document specifies the energy efficiency grades, technical requirements and test methods for permanent magnet synchronous motors.
This document is applicable to permanent magnet synchronous motors for general purpose or explosion-proof purposes in continuous working system, and the scope is as follows:
a) an asynchronous-start three-phase permanent-magnet synchronous motor powered by 50 Hz three-phase AC power supply, with a voltage grade of 1140 V and below, a rated power of 0.55 kW ~ 1000 kW and poles of 2~16;
b) an asynchronous-start three-phase permanent-magnet synchronous motor with 50 Hz three-phase AC power supply, voltages of 3 kV (3.3 kV), 6 kV and 10 kV, cooling methods of IC81W, IC86W, IC71W (IC3W7), IC411, IC416, IC511, IC611, IC616, IC516 and IC666, rated power of 200 kW to 2000 kW and poles of 4~12;
c) a permanent-magnet synchronous motor driven by variable frequency equipment powered by a variable frequency power supply, with a voltage of 1,140 V or below, a rated power of 0.55 kW to 1,250 kW and a rated rotation speed of 45 r/min to 6,000 r/min;
d) a permanent-magnet synchronous motor driven by variable frequency equipment powered by a variable frequency power supply, with voltages of 3 kV (3.3 kV), 6 kV and 10 kV, cooling methods of IC81W, IC86W, IC71W (IC3W7), IC411, IC416, IC511, IC611, IC616, IC516 and IC666, rated power of 200 kW or higher and rated rotation speed of 45 r/min to 3000 r/min;
e) a permanent magnet synchronous motors for elevator powered by a variable frequency power supply, with voltage of 1140V or below and rated power of 0.55 kW to 110 kW.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 22669-2008 Test procedures for three-phase permanent magnet synchronous machines
GB/T 32877-2022 Specific test methods for determining losses and efficiency of converter-fed AC motors
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
asynchronous-start three-phase permanent-magnet synchronous motor
permanent-magnet synchronous motors started at a certain frequency and voltage by the asynchronous torque generated by the starting winding
3.2
permanent-magnet synchronous motor driven by variable frequency equipment
permanent-magnet synchronous motors driven by variable frequency equipment
3.3
minimum allowable values of energy efficiency for permanent magnet synchronous motors
minimum allowable values of energy efficiency for permanent magnet synchronous motors under the test conditions specified in the standard
4 Energy efficiency grades
The energy efficiency grades for permanent magnet synchronous motors are classified into three grades, among which Grade 1 is the highest. The measured efficiency for permanent magnet synchronous motors of each grade under specified test method shall not be less than those specified in Tables 1~29 .
The measured efficiency allowance for permanent magnet synchronous motors of each grade under specified test method shall comply with GB/T 755.
For motors of which the rated power values and rotation speed are not listed in the tables, their efficiencies are determined by linear interpolation provided that they are under specified scope.
5 Technical requirements
The minimum allowable values of energy efficiency for permanent magnet synchronous
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Energy efficiency grades
5 Technical requirements
6 Test methods
