Maximum standard torque

Maximum standard torque. The maximum standard torque at any given rotational speed shall be that corresponding to the maximum standard brake horsepower at that speed. 

The Nametre Rotary B rotational viscometer measures torque in terms of the current needed to drive the d-c motor at a given speed while a material is under test. The standard sensors are coaxial cylinders or Brookfield disk-type spindles, but a cone—plate system is also available. The viscosity range for the coaxial cylinder sensors is 5 to 5 x 1(T mPa-s, and the maximum shear rate is 200. ... 

With a view to achieve yet more standardization in motor design, NEMA Standard MG-1 has also recommended the maximum locked rotor current of single-speed three-phase motors for the various rotor designs A, B, C, and D, for various recommended torque values. These have been derived for a 415 V a.c. system and are shown in Table 2.2. 

Composition and Functions of the Apparatus. Figure 3 is a schematic diagram of the Rauter meter. An impeller rotating at high speed gives the air pressure torque to the second vane wheel in the chamber. This torque is measured and compared with that produced by an identical impeller arrangement in a standard gas (air). The Rauter meter has proven its worth through years of densitometric service. However, because it is a purely mechanical device, its speed of response and sensitivity are limited. Its speed of response is T9 0 i 30 seconds, and its maximum sensitivity to... 

The number of torque limited processes is about 70 % [WH04b], The reason for this is explained in Fig. 10 where a standardized maximum output (volume specific output relative to speed and cube of axial distance) is plotted as a function of the diameter ratio. The descending curves indicate the torque limited output rate for different extruder series and specific mechanical energy inputs. The ascending curves indicate feed limitations for non-fluidized powder or granules with densities between 0.1 and 1.0g/cm ... 

In addition to fusion, standard specifies several additional useful procedures such as thermal stability test (time from maximum torque due to fusion to the sudden torque increase caused by the thermal degradation), color-hold stability test (time to equivalent color change), and shear stability test (the data are plotted as torque vs. rpm and sensitivity is determined from the peak value as the highest rpm which does not reduce torque). ... 

A standard motor has a very steep direct-on-line torque/speed curve characteristic, rising from a minimum of 180-250% full load torque, to a maximum of 300-500% full load torque. This maximum, called the pull out torque, occurs at about 8 5% of full speed. 

Currently, descriptions of components and devices are very heterogeneous. For devices, first classification standards, like eCl ss, exist to provide device type classifications following the functional requirements (like servo-stepper motor or a pointed profile mill) and device properties that enable the evaluation of the device application range (e.g., maximal torque of a motor or the maximum cutting depth and the cutting diameter of the profile mill). Even through the existence of first component models towards classification standards, there is no commonly accepted classification of components available. Examples of available models are eCl ss or vendor-dependent classifications, such as the drive chain classification of Lenze... 

One of the most common sources of motor watts loss is the result of a motor not being properly matched to its load. In general, for standard NEMA frame motors, motor efficiency reaches its maximum at a point below its fiill-load rating, as indicated in Fig. E-5. This efficiency peaking below fiill load is a result of the interaction of the fixed and variable motor losses resulting in meeting the design limits of the NEMA standard motor performance values, specifically locked rotor torque and current limits. 

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