1 Scope
This standard specifies the test requirements and test methods for three-phase induction motors.
This standard is applicable to three-phase induction motors.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 755-2008 Rotating Electrical Machines-Rating and Performance
GB 10068-2008 Mechanical Vibration of Certain Machines with Shaft Heights 56mm and Higher - Measurement Evaluation and Limits of Vibration Severity
GB/T 10069.1-2006 Measurement of 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 21211-2007 Rotating Electrical Machines - Equivalent Loading and Super-position Techniques - Indirect Testing to Determine Temperature Rise
GB/T 22715-2008 Impulse Voltage Withstand Levels of Form-wound Stator Coils for Rotating a.c. Machines
GB/T 22719.1-2008 Interturn Insulation of Random-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
JB/T 7836.1-2005 Electric Heater for Electrical Machine - Part 1: General Technique Specifications
JB/T 10500.1-2005 Embedded Thermometer Resistance for Electrical Machines - Part1: General Specification, Measuring Methods and Examine Rule
IEC 60034-2-1:2007 Methods for Determining Losses and Efficiency of Rotating Electrical Machinery from Tests (Excluding Machines for Traction Vehicles)
3 Main Symbols
cosφ——the power factor
f——the supply frequency, Hz
I1——the stator line current, A
I0——the no-load line current, A
IK——the locked-rotor line current, A
IN——the rated current, A
K1——the reciprocal of the resistance temperature coefficient for conductor material of stator winding at 0℃
For copper, K1=235;
For aluminum, K1=225, unless otherwise specified;
If other materials are used, K1 will be separately specified.
K2——the reciprocal of the resistance temperature coefficient for conductor material of rotor winding at 0℃
For copper, K2=235;
For aluminium, K2=225, unless otherwise specified;
If other materials are used, K2 will be separately specified.
J——the moment of inertia, kg•m2
n——the rotational speed measured during test, r/min
ns——the synchronous speed, r/min
p——the number of pole pairs
P1——the input power, W
P2——the output power, W
PN——the rated (output) power, W
Foreword III
1 Scope
2 Normative References
3 Main Symbols
4 Test Requirements
4.1 General
4.2 Test Power Supply
4.3 Test Instruments and Measurement Requirements
5 Test Preparation
5.1 Determination of Insulation Resistance
5.2 Determination of DC Terminal Resistance and Phase Resistance of Winding under Actual Cold State
6 Thermal Test
6.1 Purpose
6.2 General Description
6.3 Determination of Coolant Temperature during Thermal Test
6.4 Determination of Coolant Temperature at the End of Test
6.5 Temperature Measurement of Winding and Other Parts of Motor
6.6 Thermal Test Methods
6.7 Temperature Rise
6.8 Determination of working temperature of winding, θw, at rated load
6.9 Determination of the specified temperature θs for efficiency calculation
7 Load Characteristic Test
7.1 General
7.2 Load Test
7.3 Determination of the Corrected Value of Torque Reading Tc
7.4 Shaft Torque
7.5 Shaft Power
8 No-load Test
8.1 Determination of No-load Current and No-load Loss
8.2 Determination of friction and windage losses Pfw
8.3 Determination of iron loss PFe
9 Determination of Locked-rotor Current and Locked-rotor Torque
9.1 Locked-rotor Test at Rated Frequency
9.2 Low Frequency Locked-rotor Test
10 Determination Methods of All the Losses
10.1 General
10.2 Determination of the I2R Loss of Stator at Test Temperature
10.3 Determination of the I2R Loss of Stator Winding at Test Temperature
10.4 Determination of Friction and Windage Losses Pfw
10.5 Determination of Iron Loss PFe
10.6 Determination of Stray-load Loss Ps
10.7 Determination of Total Losses and Output Power
11 Determination of Efficiency
11.1 General
11.2 Method A —— the Input - Output Method
11.3 Method B——the Loss Analysis Method for Measuring Input Power and Output Power
11.4 Method C——Loss Analysis Methods of Dual Supply Back-to-back Test for Motors in Pair
11.5 Method E or Method E1——the Loss Analysis Method for Measuring Input Power
11.6 Method F or F1——Equivalent Circuit Method
11.7 Method G or G1——Reduced Voltage Load Method
11.8 Method H——Circle Diagram Method
12 Other Test Items
12.1 Determination of Maximum Torque
12.2 Determination of Minimum Torque
12.3 Determination of Rotational Inertia
12.4 Short-time Over Torque Test
12.5 Interturn Impulse Withstand Voltage Test
12.6 Power Frequency Withstand Voltage Test
12.7 Determination of Rotor Voltage
12.8 Overspeed Test
12.9 Noise Determination
12.10 Vibration Determination
12.11 Determination of Bearing Voltage
12.12 Determination of Bearing Current
Annex A (Normative) Correction Methods for Instrument Loss and Error
Annex B (Normative)
Calculation of Values for Eh-star Method (No-load Test of Winding in Star Connection on Unbalanced Voltage)
Annex C (Informative) Linear Regression Analysis
References
