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GB/T 6656-2025: D. C. ferrite permanent magnet motors
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 6656-2025	English	679	Add to Cart	5 days [Need to translate]	D. C. ferrite permanent magnet motors
GB/T 6656-2008	English	509	Add to Cart	4 days [Need to translate]	D.C. ferrite permanent magnet motors
GB/T 6656-1986	English	919	Add to Cart	6 days [Need to translate]	DC ferrite permanent magnet motors

GB/T 6656-2025: D. C. ferrite permanent magnet motors

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
National Standards of the People's Republic of China ICS 29.160.30CCS K 23 Ferrite permanent magnet DC motor Released on October 31, 2025 Implemented on 2026-05-01 State Administration for Market Regulation The State Administration for Standardization issued a statement. Replaces GB/T 6656-2008

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Types, Basic Parameters and Dimensions 1 5 Technical Requirements 7 6.Test Methods 16 7.Inspection Rule 21 8.Marking, Packaging, Storage and Transport 22 9.Quality guarantee period 23 Appendix A (Normative) Regulations and Inspection of Reversing Spark Ratings 24 Appendix B (Informative) Product Model 25 References 26 Figure 1.Schematic diagram of flange mounting (IMB 14) 2 Figure 2.Schematic diagram of the large flange mounting (IM B5) 3 Figure 3.Schematic diagram of the base mounting (IM B3). Figure 4.Schematic diagram of motor shaft extension diameter. 5 Figure 5.Schematic diagram of keyway and key. Figure 6.Schematic diagram of motor wiring. Figure 7 Measurement route diagram 17 Figure 8 DC power supply ripple factor measurement 18 Table 1.Structure and Installation Methods 2 Table 2 Flange Mounting (IM B14) Dimensions 3 Table 3.Dimensions for Large Flange Mounting (IM B5) 4 Table 4.Dimensions for bottom corner mounting (IM B3) 5 Table 5 Shaft Extension Dimensions and Limit Deviations 6 Table 6.Basic Dimensions and Limit Deviations of Keys Table 7 Radial runout tolerance 6 Table 8 Circular runout tolerance 7 Table 9 Parallelism Tolerance 7 Table 10 Flatness Tolerance 7 Table 11 Axial clearance 7 Table 12 Rated Data of Electric Motors 9 Table 13 Speed Tolerance and Efficiency Tolerance Table 14 Temperature Rise Test Limits 13 Table 15 Test Voltage 14 Table 16 Noise 15 Table 17 Severity Level of Sweep Frequency Vibration Test 15 Table 18 Work Duration 16 Table 19 Axial clearance measurement thrust 21 Table 20 Symbols or Colors 23 Table A.1 Spark Rating Classification 24

Foreword

This document conforms to GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting is scheduled. This document replaces GB/T 6656-2008 "Ferrite Permanent Magnet DC Motors". Compared with GB/T 6656-2008, the only changes are structural adjustments. Aside from editorial changes, the main technical changes are as follows. --Added motor outer diameter designation (see 4.1); --Added specific requirements for short-time work and periodic work schedules in the quota system (see 4.4); -- The limit deviations of the key have been changed (see 4.8, 3.10 in the.2008 edition). --The power supply ripple factor has been changed, and a measurement method has been added (see 5.3, 6.2, 4.3 and 5.1.4 in the.2008 version). --Changed speed tolerance and efficiency tolerance requirements (see 5.10, 4.8 in the.2008 edition). --The temperature rise test requirements have been changed (see 5.11, 5.6 in the.2008 edition). --Insulation resistance requirements and test methods have been changed (see 5.12, 6.8, and 4.12, 5.8 in the.2008 edition). --The withstand voltage requirements and test methods have been changed (see 5.14, 6.10, 4.13, 5.9 in the.2008 edition). --The requirements for low-temperature testing have been changed (see 5.17, 4.16 in the.2008 edition). --High-temperature testing requirements have been added (see 5.18); --The noise limit requirements have been changed (see 5.19, 4.17 in the.2008 edition). --The vibration test requirements have been changed (see 5.20, 4.18 of the.2008 edition). --The axial clearance test method has been changed (see 6.21, 5.2.2 of the.2008 version). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Rotating Electrical Machines (SAC/TC 26). This document was drafted by. China Electric Power Research Institute Co., Ltd., Zhejiang Lianyi Electric Motor Co., Ltd., and Jingma Electric Motor Co., Ltd. Company, Midea Group Co., Ltd., New Thinking Motor Co., Ltd., Zhejiang Permanent Magnet Motor Co., Ltd., Taizhou Jinyu Electromechanical Co., Ltd. The company, Zhuhai Kaibang Motor Manufacturing Co., Ltd., Weikai Certification & Testing Co., Ltd., Guangdong Haotaitai Technology Group Co., Ltd., Guangdong Shangyan Electronic Technology Co., Ltd., Ningbo Hengshuai Co., Ltd., Changzhou Haosheng Electric Co., Ltd., and Yuyao Aosheng Electric Machinery Co., Ltd. Manufacturing Co., Ltd., Weikai Testing Technology Co., Ltd., Zhejiang Samsung Electro-Mechanics Co., Ltd., Changzhou Fulin Zhongdian Intelligent Technology Co., Ltd. Ningbo Jinchang Electromechanical Technology Co., Ltd., Zhuoerbo (Ningbo) Precision Electromechanical Co., Ltd., Harbin University of Science and Technology, General Machinery Key Core Core Components Innovation Center (Anhui) Co., Ltd., Hangzhou Nazhi Motor Co., Ltd., Zhejiang Shengyue Electronic Technology Co., Ltd., Zhejiang Electromechanical Vocational College Vocational and Technical University, Zhejiang Hongda Group Wenling Dafeng Electric Co., Ltd., Hunan Guomeng Technology Co., Ltd., Shenzhen Zhongqu Electric Co., Ltd. Limited Liability Company, Huaxing Transmission Technology Wuxi Co., Ltd., Huizhou Aimeijia Magnetoelectric Technology Co., Ltd., Kleber Motor (Ningbo) Co., Ltd. The company, Yuyao Chili Motor Co., Ltd., Jiaxing Weikai Testing Technology Co., Ltd., Guangdong Bangze Chuangke Electric Co., Ltd., Shenzhen Shisheng High-Tech Power Co., Ltd., Huzhou Yueqiu Electric Co., Ltd., Ningbo Jingcheng Electric Co., Ltd., Guangdong Baoyuantong Testing Equipment Co., Ltd. The company, Kunshan Pindai Electronics Co., Ltd., Zhejiang Sanxing Electric Technology Co., Ltd., Shanghai Representative Office of the International Copper Professionals Association (USA), Zhejiang Jia Hong Tools Manufacturing Co., Ltd., and Dongguan Yuncheng Metal & Plastic Products Co., Ltd. The main drafters of this document are. Wei Zhonghua, Cheng Lei, Du Juan, Zhu Zhongjie, Ren Zhiwen, Xie Feng, He Sijian, Ding Wei, Luo Junbo, and Qi Lingjun. Zhou Liang, Zhang Chuanjia, Lu Gaofeng, Liu Peihai, Zhang Wei, Chen Chen, Li Xianzhang, Xiao Qianjin, Chen Siyu, Wang Chengyong, Han Jichao, Zhang Huaxin, Yang Xubin, Chen Feng, Zhao Ruyou, Liu Deguang, Zhong Pingxian, Mei Yuanpu, Lei Xiqiang, Luo Longqing, Zhou Manxin, Yin Zhichun, Zhou Jin, Shao Mingyuan, Huang Jiasheng, Chen Baiqing Wu Yinggui, Liang Dong, Song Xiaochen, Wu Xianquan, Liu Jing. The release history of this document and the document it replaces is as follows. --First published in 1986 as GB/T 6656-1986, and revised for the first time in.2008; --This is the second revision. Ferrite permanent magnet DC motor

1 Scope

This document specifies the types, basic parameters, dimensions, and technical requirements of ferrite permanent magnet DC motors, and describes the corresponding test methods. The law stipulates inspection rules, marking, packaging, storage, transportation, and quality guarantee period. This document applies to slotted and brushed ferrite permanent magnet excitation systems with a general-purpose housing outer diameter not exceeding 160 mm. Oxide permanent magnet DC motor (hereinafter referred to as motor). Motor housing with an outer diameter greater than 160 mm or various motors derived from this series. This method can also be applied to other types of permanent magnet DC motors.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 191 Pictorial Symbols for Packaging and Storage GB/T 755-2025 Ratings and Performance of Rotating Electrical Machines GB/T 1971 Markings on wire ends and direction of rotation for rotating electrical machines GB/T 1993 Cooling methods for rotating electrical machines GB/T 2423.5 Environmental testing – Part 2.Test methods – Test Ea and guidelines. Impact GB/T 2423.10 Environmental testing – Part 2.Test methods – Test Fc. Vibration (sine) GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.Sampling Schemes Retrieved by Acceptable Quality Limit (AQL) for Lot-by-Lot Inspection GB 4343.1 Electromagnetic compatibility requirements for household appliances, power tools and similar appliances - Part 1.Emissions GB/T 4942 Protection ratings (IP codes) for integral structures of rotating electrical machines GB/T 5171.21 Small power electric motors - Part 21.General test methods GB/T 10069.1 Noise Measurement Methods and Limits for Rotating Electrical Machines Part 1.Noise Measurement Methods for Rotating Electrical Machines GB/T 12350 Safety Requirements for Small Power Electric Motors GB/T 12665 Requirements for damp heat test of electric motors under general environmental conditions

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Types, Basic Parameters and Dimensions 4.1 Outer Diameter Number The outer diameter designation of the electric motor in this document is expressed by the outer diameter of the motor housing (mm). The following 13 outer diameter grades are preferred. 20, 24, 28,... 36, 45, 55, 63, 76, 80, 90, 110, 130, 160. ...