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· The characteristics of the rigid drive is rigid · The rigidity of the high-efficient electrical drives is high · The standard supply grid has the oscillation period of 20 ms · Select the components that belong to the servo drive position sensor · The multi-quadrant operation is typical for car · If the required speed would rise, the mechanical time constant do not change · At the very low speed the torque is less than rated · In the case of low quick action the overtorque is 0 · The overshot of the stable system no overshoot · The usual time response processes are step · In the accurate drives, the accuracy range is small · Select the motors with the slip rings wound-rotor synchronous · Select the natural reference frames L1, L2, L3 · Select the stationary reference frames , · If the stator field frequency is 100, what will be the synchronous frequency of the 2- pole motor? 100 · Select the correct frequency equilibrium 1 = 2 + 12 12 = 1 - 2
In the reversing operation, the following variables change their sign: pakuks torque ja speed The speed range of the high - efficient electrical drives is high. In the generator mode, the motor brakes. The counter-torque of the hoist is active/reactive/inductive (pakuks active) The friction torque is passive/reactive/inductive (pakuks reactive) In the case of high quick action tauT is short ja taue is short In the case of low quick action the overtorque is 0. The overshot of the stable system - no overshoot. The usual time response processes are step (äkki peaks miskit veel olema?) In the accurate drives, the accuracy range is small. How does the drive accuracy depend on the speed range? the speed rigidity? the overload capacity? The higher, the better. Why is the torque restricted at the very low speed? In the range of the low speeds due to the cooling deterioration, the load derating is recommended up to 15...30 %.
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