วันพุธที่ 14 สิงหาคม พ.ศ. 2556

Ac Motor Torque Speed Curve

Due to feedback, the VFD will shift motor torque-speed curve, as per the load and the input condition. This helps to achieve better energy efficiency. Breakdown Torque: the maximum torque that the motor can develop; it occurs as a point on the speed-torque curve below synchronous or full-load speed.

Ac Motor Torque Speed Curve
Ac Motor Torque Speed Curve
Ac Motor Torque Speed Curve3Ac Motor Torque Speed Curve1Ac Motor Torque Speed Curve5Ac Motor Torque Speed Curve4
Ac Motor Torque Speed CurveAc Motor Torque Speed Curve2Ac Motor Torque Speed Curve6

Shift the torque-speed curve by varying other parameters so that the load torque curve (red line below) will intersect the motor curve (blue line) applies to the motor torque pulsation at six times the input frequency. A smooth speed is thus achieved at lower frequencies. As an example, the figure below shows torque-speed curves of the ac induction motor with two different loads. The system can be termed as stable, We are AC Torque Motors, AC Torque Motors Manufacturer, AC Touque Motor Exporter, India. Contact Us For AC Torque Motor Export's Needs. The linear model of a D.C. motor torque/speed curve is a very good approximation. The torque/speed curves shown below are actual curves for the green maxon motor The frame 818 speed-torque curve is shown in Figure 5 for a 200% overload application at base speed and the NEMA MG-1 193% over-load at top speed. The curve for the output power of the motor is deduced from the graph of torque versus speed. (DRW 2) First, decide what the allowable variation in speed and torque can be for a given change in load.

Ac Motor Torque Speed Curve1
Ac Motor Torque Speed Curve

This ac motor design is subdivided into several groups that vary according to slip or the shape of the speed-torque curve. AC Motors - Design F: In order to operate the motor with the desired speed/torque curve, we must apply the proper voltage to the motor at each frequency. As we have already seen,

Ac Motor Torque Speed Curve2
Ac Motor Torque Speed Curve

Design D motors deliver high starting torque and are designed with high slip (more than 5%) so that motor speed can drop when fluctuating loads are encountered. Motor speed can be changed because the torque curve of the motor is effectively modified by the amount of resistance

Ac Motor Torque Speed Curve3
Ac Motor Torque Speed Curve

Ac Motor Torque Speed Curve4
Ac Motor Torque Speed Curve

Ac Motor Torque Speed Curve5
Ac Motor Torque Speed Curve

Ac Motor Torque Speed Curve6
Ac Motor Torque Speed Curve

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