Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Electric motors convert electrical energy into mechanical energy by utilizing theproperties of electromagnetic energy conversion. The different types of motorsoperate in different ways and have different methods of calculating the performance,but all utilize some arrangement of magnetic fields. Understanding the conceptsof electromagnetics and the systems of units that are employed is essential tounderstanding electric motor operation.The first part of this chapter covers the conceptsand units and shows how forces are developed. Nonlinearity of magnetic materialsand uses of magnetic materials are explained. Energy and coenergy conceptsare used to explain forces, motion, and activation. Finally, this chapter explains howmotor torque is developed...
Nội dung trích xuất từ tài liệu:
HANDBOOK OF SMALL ELECTRIC MOTORS
