When is torque maximum

They are the strength of the rotor current; the flux interacts between the rotor of the motor and the power factor of the rotor. The value of torque when the motor is running is given by the equation shown below:. The impedance is the opposition offered by the electronic circuit element to the flow of current.

If the impedance of the stator winding is assumed to be negligible. Thus, for the given supply voltage V 1 , E 20 remains constant. YOu could use it to find the force on say one side the coil, or a wire in a magnetic field etc You could think that when the coil is flat in the field, the wires on each side are perpendicular to the magnetic field, but the coil is parallel with the field.

Does that make sense? The wires on the sides of the coil will always have a maximum force on them as they are perpendicular to the field. Another way to think about torque is that it is Force x Perpendicular Distance from the line of action to the pivot point.

Drawing a triangle should help you understand which angle to use and whether to use cos or sin. Check the angle! Shoom said:. Once again, it depends on the angle given. You are currently doing exactly what they wanted as a distractor in Eg Q7 in the paper. The two are related to one another, and both express engine output in different ways.

Both horsepower and torque are measured to give shoppers a sense of the performance they might expect from their vehicle. Engines in mainstream cars and trucks typically generate to lb. Torque output is a result of many variables, including the size of the engine, and how it is designed to operate. In simple terms, the more torque an engine has, the better suited it is to hard work such as towing, hauling or climbing steep grades.

This is why torque is often the figure of utmost importance when moving something big and heavy, like a truck with a trailer attached. What is Horsepower? You might consider how loud the stereo goes. The maximum listening volume possible for sustained playback is like the horsepower of an engine: a good indication of how much power that stereo has.

This equation can be shown to be valid for a loop of any shape. The net force on the loop is zero. Find the maximum torque on a turn square loop of a wire of The torque found in the preceding example is the maximum.

See Figure 2 d. See Figure 3. Figure 3. Meters , such as those in analog fuel gauges on a car, are another common application of magnetic torque on a current-carrying loop.

Figure 4 shows that a meter is very similar in construction to a motor. A linear spring exerts a counter-torque that balances the current-produced torque. This makes the needle deflection proportional to I. If an exact proportionality cannot be achieved, the gauge reading can be calibrated. To produce a galvanometer for use in analog voltmeters and ammeters that have a low resistance and respond to small currents, we use a large loop area A , high magnetic field B , and low-resistance coils.