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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 ...
For the same application, the program would select a 125 kW gen-set when using a variable frequency drive and a primary reactor bypass with a 30% starting voltage drop, cutting the gen-set in half (Slides 36–39). [5] Energy Savings – "Most motors turn at nearly constant speed. However, much of the time the devices they drive operate at less ...
Thus it is not possible to control the motor if the output frequency of the variable frequency drive is zero. However, by careful design of the control system it is possible to have the minimum frequency in the range 0.5 Hz to 1 Hz that is enough to make possible to start an induction motor with full torque from a standstill situation. A ...
Electronic test equipment manufacturers (1 C, ... In-circuit testing; Instrument control; ... Vector signal analyzer;
Creates constant-amplitude variable frequency sine waves to test frequency response Transistor tester: Tests transistors Tube tester: Tests vacuum tubes (triode, tetrode etc.) Wattmeter: Measures power in a circuit Vectorscope: Displays the phase of the colors in color TV Video signal generator: Generates video signal for testing purposes Voltmeter