This part of GB/T 25389 specifies the main types, technical requirements, testing methods, inspection rules, marking and packaging, service life, etc. of permanent magnet synchronous generators for wind turbines connected to the grid via converters.
This part is applicable to permanent magnet synchronous generators (hereinafter referred to as generators), and may be referred to by other types of generators.
2 Normative references
The following referenced documents are indispensable for the application 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 191 Packaging - Pictorial marking for handling of goods
GB/T 755 Rotating electrical machines - Rating and performance
GB/T 997 Rotating electrical machines - Classification of types of construction, mounting arrangements and terminal box position (IM Code)
GB/T 1993 Cooling methods for rotating electrical machines
GB/T 2900.25 Electrotechnical terminology - Rotating electrical machines
GB/T 4831 Specification for model of rotating electrical motor
GB/T 4942.1 Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification
GB/T 10068 Mechanical vibration of certain machines with shaft heights 56mm and higher - Measurement, evaluation and limits of vibration severity
GB/T 10069.1 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 10069.3 Measurement of airborne noise emitted by rotating electrical machines and the noise limits - Part 3: Noise limits
GB/T 12665 Requirements of damp-heat testing of electrical machine for service in general environmental condition
GB/T 22714 Test specifications of interturn insulation of form-wound winding for AC low-voltage electrical machines
GB/T 22715 Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines
GB/T 22719.1 Interturn insulation of random-wound winding for AC low-voltage electrical machines - Part 1: Test methods
GB/T 22719.2 Interturn insulation of random-wound winding for AC low-voltage electrical machines - Part 2: Test limits
GB/T 25389.2 Wind turbines - Permanent magnet synchronous generator - Part 2: Testing methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.25 and the following apply.
3.1
irreversible magnetizing loss
difference in magnetic properties of the permanent magnet failing to restore to the original value after the external conditions are restored. It is generally manifested as residual magnetism or loss of magnetic flux
3.2
efficiency curve
relationship between the output power and the efficiency of generators at different working points on the unit's speed-power curve
3.3
power characteristic
expression of the generating capacity of generators; the power characteristic curve shows the relationship of the generator speeds and the maximum output power at corresponding speeds
GB/T 25389.1-2018 The following standards are cited：
GB/T 25389.1-2018 Cited by the following standards：
