Friday, August 24, 2018

Electric Drives By Marcel Jufer

Electric Drives By Marcel Jufer


Contents:
Chapter 1. Introduction – Electric Drive Components.
Chapter 2. Driven Bodies
Chapter 3. Transmission
Chapter 4. Motors
Chapter 5. Motors: Characterization
Chapter 6. Global Design of an Electric Drive
Chapter 7. Heating and Thermal Limits
Chapter 8. Electrical Peripherals
Chapter 9. Electronic Peripherals
Chapter 10. Sensors
Chapter 11. Direct Drives
Chapter 12. Integrated Drives
Preface:
An electric drive is a system providing an electromechanical conversion using an electric motor and
including all the peripherals necessary for transmission, supply and control. The concept of a system, in opposition to the motor only, is characteristic of the electric drive. The quality of this system is evaluated based on the weakest component. The electric drive must be adapted to the application considered, using some of its components. The driven body (pump, machine tool, tracer, computer peripheral, robot, etc.), if it is not an integral part of the drive, determines its characteristics via the specifications which follow. Any driven body is characterized by a function: pumping, position transfer, machining, oscillating movement, speed control, etc. The specifications objective is to translate this function into the terms of electric drive. Furthermore, a certain number of constraints, bound to the environment associated with the driven body, can intervene: primary electric source, atmosphere and ambient temperature, dimensional constraints (diameter, length, mass), etc.Most electric drives can be characterized by the reference or rated running of the load. This corresponds to the torque that the system can permanently supply, without over heating any of its components. It is related to a reference speed ΩN. This reference speed is not the maximum possible speed. By rule and without particular precision, any drive has to withstand an over-speed of 20% of the rated speed.

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