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DTC techniques for the interior permanent magnet synchronous machine (IPMSM) were introduced in the late 1990s [16] and synchronous reluctance motors (SynRM) in the 2010s. [17] DTC was applied to doubly fed machine control in the early 2000s. [18] Doubly fed generators are commonly used in 1-3 MW wind turbine applications.
Digital-to-time converter (a.k.a. digital delay generator), an electronic circuit or piece of equipment that generates precise delays defined by a digital control signal; Dimension Time Cost model; Digitally tuned capacitor, a type of electrical capacitor whose capacitance can be changed by means of a digital control signal
With DTC the inverter is directly controlled to achieve the desired torque and flux for the motor. During flux braking the motor is under DTC control which guarantees that braking can be made according to the specified speed ramp. This is very different from the DC injection braking typically used in drives. In the DC injection method DC ...
Due to high cost of a generator, a set of sensors and limiters will trigger the alarm when the generator approaches the capability-set boundary and, if no action is taken by the operator, will disconnect the generator from the grid. [3] D-curve expands with cooling. The D-curve for a particular generator can be expanded by improved cooling.
For a machine to run as an asynchronous generator, capacitor bank must supply minimum 4567 / 3 phases = 1523 VAR per phase. Voltage per capacitor is 440 V because capacitors are connected in delta. Capacitive current Ic = Q/E = 1523/440 = 3.46 A Capacitive reactance per phase Xc = E/Ic = 127 Ω. Minimum capacitance per phase:
Groups of large, specially constructed, low-inductance high-voltage capacitors (capacitor banks) are used to supply huge pulses of current for many pulsed power applications. These include electromagnetic forming , Marx generators , pulsed lasers (especially TEA lasers ), pulse forming networks , fusion research, and particle accelerators .
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