Reading a motor curve
WebDec 17, 2011 · Consider a centrifugal pump operating at 4,000-gpm and producing 300-ft of head at 1800-rpm. According to its curve (see Figure 1 below), pump efficiency is 82 percent. This happens to be at the best efficiency point (BEP) point, but, in general, the same logic would apply to any operating point. WebSo let’s convert that RPM to RPS (seconds) by multiplying it with the circumference (which has a radius/length of 1). Then convert minutes to seconds by dividing by 60. Voila, we now have 0.10472 RPS. Now we have the ability to convert that 550 foot-pounds per second into a common value. Divide our 550 by the 0.10472 RPS to get…. 5252.
Reading a motor curve
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WebJun 1, 2024 · Draw a vertical line to the point where it intersects the curve. Then draw a horizontal line to the left side of the graph and find the time to trip. For example, in this illustration a circuit breaker will trip when current … WebDec 6, 2013 · Fig. 1: The graph shows motor performance at an initial temperature of 25°C. Fig. 2: A comparison of motor performance at the initial 25°C level and at an elevated …
Websimple motor. When a permanent magnet is positioned around a loop of wire that is hooked up to a D.C. power source, we have the basics of a D.C. motor. In order to make the loop … WebSo let’s convert that RPM to RPS (seconds) by multiplying it with the circumference (which has a radius/length of 1). Then convert minutes to seconds by dividing by 60. Voila, we …
WebOct 8, 2024 · An example is shown below. The torque-speed curve is similar for all centrifugal pumps due to simple math: the pump torque varies as the square of its speed. However, when the pump is at rest—0% full load speed—the full load torque is never also 0%. Starting a rotating pump requires the motor to overcome the pump inertia and static … WebFirst, the red line on the left hand side of the pump curve is the Minimum Continuous Stable Flow (MCSF) line. This is the point beyond which the pump manufacturer has determined the pump should not be allowed to …
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WebJan 15, 2024 · In Fig. 2, a positive displacement pump curve shows the influence of viscosity on slip with a correction chart. With changes in viscosity and pressure, slip correction … dクリニック 福岡 口コミWebIn the top right hand corner of the curve it tells use the speed of the motor and frequency that the pump will be operated at. It is important that this information is checked, as the frequency affects the speed at which a motor will run (see below table) and differing countries use different frequencies .For example, in the UK 50Hz is used yet ... dクリニック 看護師WebMay 13, 2015 · You are considering it from an electrical engineering perspective. Speed vs torque. It's more a digital motor with a rotor position that can be easily controlled (read head on floppy drives). It is a brushless motor and its strongest torque (traction or holding) occurs when the coils are energized. They have fractional hp ratings (>34.3 mN·m). dクリニック 福岡 駐車場WebThis White Paper is to clarify the reading and the interpretation of the characteristic curves (trip curves, specific let-through energy curves and limitation curves) of the ... 16 - INSTANTANEOUS TRIP CIRCUIT BREAKER (MOTOR CIRCUIT PROTEC-TOR OR CIRCUIT INTERRUPTER): is one intended to provide short circuit protection only. Although acting ... dクリニック福岡 営業時間A motor / gear motor performance curve conveys five specific parameters; speed, torque, current draw, power and efficiency. The overall performance data will illustrate the optimal conditions the motor should operate at as well as its limitations. This information can be used to determine if the motor will be … See more Now that we have covered the basics, you can begin to understand what the lines and numbers represent. The performance curve below is a more detailed performance representation for a typical dc gear motor. We will … See more Electric motorshave two types of usage which are defined by torque capacity in which they are operating at. These ranges are meant to depict the overall safe operating limits of the … See more We hope that this explanation has helped you get more familiar with motor and gear motor performance curves. Not all vendors or manufacturers will offer all of the motor data so if a certain parameter is missing, please … See more dクリニック福岡 求人Web1 : a force that produces or tends to produce rotation or torsion (an automobile engine delivers torque to the drive shaft); also : a measure of the effectiveness of such a force … dクリニック福岡 看護師WebJan 28, 2014 · Time Current Curves Item Identification. The TCC diagram shown in Figure 1 (below) plots the interrupting response time of a current interrupting device versus time. Current is shown on the horizontal axis … dクリニック 薬 zb