GB/T 39553-2020General specification for DC servo motors (English PDF)

3.1 Classification

The classification of motors shall refer to Appendix A.

3.2 Model designation

The model designation of motors shall refer to Appendix A, or be specified in the product-specific technical specifications.

3.3 Basic structural and mounting types

The basic structural and mounting types of motors shall comply with the provisions of Clause 4 in GB/T 7346-2015 or the product-specific technical specifications.

3.4 Rated voltage

The preferred rated voltages for motors are 3 V, 4.5 V, 5 V, 6 V, 9 V, 12 V, 24 V, 27 V, 28 V, 36 V, (42 V), 48 V, 60 V, 90 V, 100 V, 110 V, 120 V, (180 V), (200 V), 220 V; alternatively, they shall comply with the provisions of the product-specific technical specifications.

3.5 Circuit diagrams

Figure 1 shows the circuit diagram for permanent magnet motors; Figure 2 shows the circuit diagram for electromagnetic motors. For electromagnetic motors, the rated excitation voltage shall be applied prior to energizing the motor for operation.

4.1 Appearance

4.1.1 Technical requirements

The surface of the motor shall be free from rust, dents, scratches, peeling of the coating layer. The color and markings shall be clear and unambiguous. Fasteners shall be securely connected; lead wires or terminals shall be intact and undamaged.

4.1.2 Test methods

Visually inspect the appearance of the motor and its accessories.

4.2 Nameplate

4.2.1 Technical requirements

The motor shall be equipped with a nameplate. The nameplate shall comply with the provisions of Clause 4 in GB/T 18211-2017.

4.2.2 Test methods

Perform the nameplate durability test, in accordance with the method specified in Clause 5.2.2 of GB/T 7345-2008.

4.3 Lead wires or terminals

4.3.1 Wiring markings and direction of rotation

4.3.1.1 Technical requirements

The motor terminals may be brought out directly via lead wires, or alternatively through terminal boards, lugs (posts), or electrical connectors; the specific method of connection shall be stipulated in the product-specific technical specifications. The motor terminals shall bear clear markings; specific requirements shall comply with the provisions of Table 1 or the product-specific technical specifications.

The motor is capable of operating in both forward and reverse directions. Permanent magnet motors shall be wired in accordance with Figure 3, while electromagnetic motors shall be wired in accordance with Figure 4. Terminals marked T1 and T2 shall be connected to the positive and negative poles of the excitation power supply, respectively (these connections are not applicable to permanent magnet motors). When terminals marked S1 and S2 are connected to the positive and negative poles of the power supply, respectively, the direction of rotation of the motor shall be counter-clockwise; this direction is designated as the positive direction. For motors with a double shaft extension, the shaft extension at the end without lead wires (or lugs/posts) […]