A Simple Explanation of Voltage Spikes and Bearing Current in VFD Fed MotorsMuch has been written about the compatibility of polyphase induction motors with variable frequency drives (VFD's). Both winding stresses and bearing currents have resulted in motor failures under certain operating conditions....
We see that R4 makes a voltage divider together with R3 and R2. Since R4 = R2 + R3 the voltage will be divided in half on the right side of R4. Since A is not connected to anything, no current will pass through R1 and therefore no voltage drop will occur over R1. So terminal A...
To turn a MOSFET transistor on, you need a voltage between gate and source that is higher than the threshold voltage of your transistor. For example, the BS170 has agate-source threshold voltageof 2.1V. (You’ll find this info in thedatasheet). The threshold voltage of a MOSFET is actua...
The following sections include important considerations for each external component and an explanation of how the nomographs and selection tables were developed. 8.1.2 Inductor The inductor is the key component in a switching regulator. For efficiency, the inductor stores energy during the switch ON ...
Below is my attempt at a step-by-step explanation of how this circuit works. The op-amp (A1) is operating in a negative-feedback configuration. The presence of the instrumentation amplifier (A2) in the feedback path does not change the fact that the feedback loop has ...
What is a Functional? Types of Functions: A to ZWhat is a Function?Watch the video for a quick explanation of functions vs. non-functions:Can’t see the video? Click here to watch it on YouTube.A function is a type of equation or formula that has exactly one output (y) for every...
You've seen bright red neon signs and other colors of lights, but do you understand how they work? Here's a simple explanation of how neon lights work.
Demonstration experiment and steps of the explanation search The primary experiment to show Let us assemble the cell arrangement with the serial con- nection of the two cells, the cylindrical Ni foil at the beaker perimeter being the anode for both cells. It is advised that the Cu ...
This allows the C1 to discharge through the R2, but when the remaining voltage is one-third that of the power supply, pin 2 detects it and disconnects pin 7 from the ground. The C1 will charge up again and the cycle repeated.
Simple UPS Description. This is the circuit diagram of a simple UPS that can deliver 12V unregulated and 5V regulated DC. The transformer T1 steps down the mains voltage to 12V AC and then the bridge B1 rectifies it. The rectified signal is smoothed by the capacitor C1.When the mains ...