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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.
is the motor constant [1] (sometimes, motor size constant).In SI units, the motor constant is expressed in newton metres per square root watt (/): = where is the motor torque (SI unit: newton–metre)
An electrical meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. Only one conductor is normally ...
A spring scale, spring balance or newton meter is a type of mechanical force gauge or weighing scale. It consists of a spring fixed at one end with a hook to attach an object at the other. [ 1 ] It works in accordance with Hooke's Law , which states that the force needed to extend or compress a spring by some distance scales linearly with ...
= 10 −52 m 2: square (roofing) ≡ 10 ft × 10 ft = 9.290 304 m 2: square chain (international) sq ch ≡ 66 ft × 66 ft = 1 ⁄ 10 ac ≡ 404.685 642 24 m 2: square chain (US Survey) sq ch ≡ 66 ft (US) × 66 ft (US) = 1 ⁄ 10 US survey acre ≈ 404.6873 m 2: square foot: sq ft ≡ 1 ft × 1 ft: ≡ 9.290 304 × 10 −2 m 2: square foot ...
Use a soft tape measure like the ones used for sewing. Measure loosely to give your dog enough room in his costume. Next, measure your dog's chest. Begin at the front legs and measure around the body.
UPS will pay $45 million to settle charges that it improperly valued its freight division, the Securities and Exchange Commission announced Friday. The regulator agency said that UPS materially ...
Denzel Washington revealed to Esquire magazine as part of a recent cover story that he is 10 years sober. He cut off alcohol at 60 years old after a 15-year drinking pattern that started in the ...