By Jens Weidauer, Richard Messer
From the perspective of a person this e-book covers all features of recent electric drives. it really is aimed toward either clients, who desire to comprehend, layout, use, and preserve electric drives, in addition to experts, technicians, engineers, and scholars, who desire to achieve a entire assessment of electric drives.
Jens Weidauer and Richard Messer describe the rules of electric drives, their layout, and alertness, via to advanced automation suggestions. within the strategy, they introduce the full spectrum of force options on hand and their major functions. a unique element is the mix of a number of drives to shape a force approach, in addition to the combination of drives into automation solutions.
In easy and transparent language, and supported with many diagrams, advanced relationships are defined and provided in an easy-to-understand approach. The authors intentionally steer clear of a finished mathematical therapy in their topic and in its place specialise in a coherent description of the energetic rules and relationships. for that reason, the reader might be able to comprehend electric drives as a complete and to resolve drive-related difficulties in daily expert lifestyles.
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Extra resources for Electrical Drives: Principles, Planning, Applications, Solutions
Example text
The armature winding in both of these motor types does not contain iron. Whereas the bell-shaped-rotor motor is used for small-drive applications of a few watts, disc-rotor motors can reach powers of up to approximately 5 kW. In the lower power range the electrical connection for DC motors is via Terminal flying leads, and in the larger power range using a terminal box mount- designation ed on the motor. DC motors can be operated with various circuit configurations. 10 shows the connection diagram for a compensated shuntwound DC motor.
The maximum speed that can be achieved is determined by the maximum value of the armature voltage. Armature resistance Increasing the armature resistance leads to an increase in the gradient of the characteristic. The no-load speed at the operating point M = 0 remains unchanged. 3 Fixed-speed drives using DC motors speed of a lightly-loaded motor. The load-dependent speed reduction increases when the armature resistance is increased. Changing the armature resistance is therefore only suitable for fine tuning the speed under constant load conditions and for controlled starting.
E. torques, a very large current would have to flow in the conducting loop. The crosssectional area of the conductor of the conducting loop would have to be sized accordingly. 2. If the current were to be switched on when the loop is exactly in the horizontal position, the Lorentz forces would compensate themselves and there would be no rotational movement. The loop would remain stationary. 2 The DC motor 3. The Lorentz force always acts in the same direction. This results in the turning force exerted on the loop being dependent on the position of the loop itself.
