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In vector control, an AC induction or synchronous motor is controlled under all operating conditions like a separately excited DC motor. [21] That is, the AC motor behaves like a DC motor in which the field flux linkage and armature flux linkage created by the respective field and armature (or torque component) currents are orthogonally aligned such that, when torque is controlled, the field ...
AC VFD AC VFD AC VFD AC VFD Control platform Brush type DC V/Hz control Vector control Vector control Vector control Control criteria Closed-loop Open-loop Open-loop Closed-loop Open-loop w. HFI^ Motor DC IM IM IM Interior PM; Typical speed regulation (%) 0.01: 1: 0.5: 0.01: 0.02 Typical speed range at constant torque (%) 0–100: 10–100: 3 ...
Direct torque control (DTC) is one method used in variable-frequency drives to control the torque (and thus finally the speed) of three-phase AC electric motors.This involves calculating an estimate of the motor's magnetic flux and torque based on the measured voltage and current of the motor.
The scalar control has been to a large degree replaced in high-performance motors by vector control that enables better handling of the transient processes. [1] Low cost and simplicity keeps the scalar control in the majority of low-performance motors, despite inferiority of its dynamic performance; [ 3 ] vector control is expected to become ...
China's Ministry of Commerce adds 28 U.S. entities to export control list to "safeguard national security and interests." ... Old Navy's Break a Sweat Sale has activewear from $2 — shop our top ...
Wildfires began breaking out in Southern California Tuesday morning as a life-threatening, widespread windstorm that could be one of the most destructive to hit the region in over a decade roars ...
A variable frequency drive (VFD) or variable speed drive (VSD) describes the electronic portion of the system that controls the speed of the motor. More generally, the term drive, describes equipment used to control the speed of machinery. Many industrial processes such as assembly lines must operate at different speeds for different products.
(The Center Square) – A new Republican oversight report accuses former Congresswoman Liz Cheney of colluding with witnesses in the Jan. 6 Select Committee investigation that she oversaw. The ...