GB/T 5171.1-2014Small power motors—Part 1: General technical requirements (English PDF)

1 Scope

This Part of GB/T 5171 specifies the general technical requirements for small power motors.

This Part is applicable to motors whose maximum continuous rated power does not exceed 1.1 kW when converted to 1,500 r/min.

This Part is also applicable to other single-phase asynchronous motors with a power other than the value mentioned above.

The special requirements for various types of motors, and other requirements not specified in this Part shall be specified in the product standards of the various types of motors.

2 Normative References

The following documents are indispensable to the application of this document. 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 321 Preferred Numbers - Series of Preferred Numbers

GB 755 Rotating Electrical Machines - Rating and Performance

GB/T 1032 Test Procedures for Three-phase Induction Motors

GB/T 1311 Test Procedure for Direct Current Machines

GB 1971 Rotating Electrical Machines - Terminal Markings and Direction of Rotation

GB/T 2423.3 Environmental Testing for Electric and Electronic Products - Part 2: Testing Method - Test Cab. Damp Heat, Steady State

GB/T 2423.4 Environmental Testing for Electric and Electronic Products - Part 2: Test Method - Test Db. Damp Heat, Cyclic (12 h + 12 h cycle)

GB/T 2829 Sampling Procedures and Tables for Periodic Inspection by Attributes (apply to inspection of process stability)

GB/T 2900.25 Electrotechnical Terminology - Rotating Electrical Machines

GB/T 2900.27 Electrotechnical Terminology - Small-power Motor

GB 4343.1 Electromagnetic Compatibility Requirements for Household Appliances, Electric Tools and Similar Apparatus - Part 1: Emission

GB 4706.1 Household and Similar Electrical Appliances - Safety - Part 1: General Requirements

3 Terms and Definitions

What is defined in GB 755, GB/T 2900.25, GB/T 2900.27 and GB 4706.1, and the following terms and definitions are applicable to this document.

4 Operating Conditions

5 Working System and Rating

The working system and rating shall comply with the stipulations of GB 755.

6 Measuring Instruments for Tests

6.1 In the motor tests, the accuracy of the electrical measuring meter shall be not lower than Level 0.5; the accuracy of the instrument transducer shall be not lower than Level 0.2; the accuracy of the speed measuring instrument shall be not lower than Level 0.1; the accuracy of the torque measuring instrument shall be not lower than Level 0.5; the accuracy of the frequency meter shall be not lower than Level 0.1; the accuracy of the dynamometer shall be not lower than Level 1;

6.2 The above-mentioned test-related instruments shall adopt true effective value measuring instruments.

6.3 In the selection of the instruments, the measured value shall be within 20% ~ 95% of the instrument range.

6.4 The nominal torque of the dynamometer or torque measuring instrument shall not exceed 3 times of the rated torque of the motor being tested.

6.5 If there are requirements different from the above, they shall be specified in the technical conditions of specific products.

7 Controllers and Motors

7.1 When the performance of the motors depends on the matched corresponding controllers (such as. brushless direct current motor and variable-frequency induction motor, etc.), in principle, they are considered as a whole. As a system, it shall comply with the requirements of this Part. In addition, the system shall be subjected to the various tests specified in this Part.

7.2 For the motors with the controller integrated inside, the motors, as a whole, shall be subjected to the various tests specified in this Part.

7.3 For the motors with an independent controller, the controller shall have sufficient output capacity and overload capacity to match the output power of the motors. The manufacturer shall specify and explain the output capacity and power of the controller and the motor in the instruction manual.

8 Rated Values

8.2 The rated power (W) shall be selected in accordance with the following rules. 0.4, 0.6, 1.0, 1.6, 2.5, 4, 6, 10, 16, 25, 40, 60, 90, 120, 180, 250, 370, 550, 750, 1100, 1500, 2200; it may also be separately formulated in accordance with the matching demands.

8.3 The rated torque shall be selected in accordance with R20 of GB/T 321 and its derivative series.

8.4 The rated frequency of AC motors is 50 Hz.

8.5 The rated voltage of the motors is.

9 Requirements for Structure

Product standards shall specify specific protection degrees, cooling modes, installation modes, installation dimensions and tolerances, etc.

10 Markings