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Round Dispenser  Two-axis Dispenser Double-liquid Glue Filling Coater Four-axis Robotic Arm Dispenser Valve Dispenser Auto horn line Auto circular external Auto magnetic circuit 400-777-9399 Shenzhen Headquarters: Shenzhen Jiujuok Industrial Add：Building B, Juji Technology Industrial Park, Houting Cummunity, Shajing Street, Baoan District, Shenzhen, China. Tel：0755-29351099 Fax：0755-29351799 MB/Wechat：13428976919 QQ Online：38195027 E-mail：zx@szjiuju.com Service Hotline |
磁体形状和充磁偏差，对电机有多大影响
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理论上，径向充磁永磁体能够产生宽度180°的方波反电动势，但受永磁体实际形状以及充磁不均匀的影响，实际径向充磁永磁无刷直流电机的空载反电动势为梯形波。由两相导通六状态控制方式可知，反电动势的平顶宽度至少要达到120°。而当平顶部分宽度不够，在方波电流的作用下将会产生电磁转矩脉动，最终引起电机的振动和噪声。 因此，有必要讨论实际磁刚形状及充磁偏差对反电动势波形的影响： 理想的径向充磁永磁体的极弧宽度接近180°，但实际上多采用平行边切割，极弧宽度自然小于180°。另外实际永磁体多采用等径切割，因此永磁体的径向内侧和径向外侧并不是平行的，这都会影响到实际极弧系数的大小并最终影响反电动势势波形。
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Shenzhen hangshaC Shenzhen Jiujuok Industrial Equipment co., Ltd. (www.jiujuok.com) is National High-tech Enterprise integrating R&D, manufacturing, and sales of the Dispensing equipment、Magnetization euipment, and Industrial Robot . Over the years, the company has been committed to product research and development and innovation, and has established long-term cooperative relations with a number of universities in China, such as Changsha university of science and technology.Obtained a number of national technology patents and passed "national authoritative testing, quality qualified products" firmly, won "China's independent innovation products" and other honors.The products are widely used in electronics (loudspeaker, mobile phone, computer), automobile, optical device, plastic products and other industries, and are widely favored by the market. Learn More |
