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The valve works by attracting an iron armature into a solenoid. This means that when un-energised, there's a large airgap in the magnetic circuit. When it's energised, the airgap is much smaller. The large initial airgap means that a large current is required to develop enough force to move the armature. When the airgap is smaller, less current is needed to ...


2

Just about the only signal that you can't generate a good triangle wave from is a sine-wave, or the sum of a small number of sine waves. If you put a sine-wave into a linear circuit network the output will be a sine-wave of the same frequency as the input. The amplitude and phase of the output may be different though. If you put a sum of sine waves into a ...


2

As already said by others: RLC-only circuits are linear. Triangle wave contains harmonic frequency components. Linear circuits do not generate harmonics. => No continuous triangle wave output is possible if the input is a pure sinewave and the circuit is linear. You need non-linear parts. One possibility is a voltage divider. If the upper half of the ...


1

When you close the switch you have energy stored in the Cap and none in the inductor, but you have started an ideal LC resonant circuit for 1/4 cycle until the Cap voltage oscillates negative and conducts the diode heavily with the same current now as the peak current in the inductor which dissipates almost all the energy in the next half-cycle. This is ...


1

Just because a capacitor is overall neutral does not mean it cannot contain a voltage between its two ends. Every capacitor will have +Q charge somewhere and -Q charge somewhere else, and because those charges are not in the same place, we say the capacitor stores the charge Q. Q does not denote the overall charge of the capacitor. The magnitudes of the ...


1

An ideal voltage source can provide unlimited current, so it cannot be replaced with an ideal current source of any specified value. No matter what load current is drawn, the terminal voltage is always equal to the open-circuit voltage in this ideal case. So there is no meaningful value of short-circuit current, and Norton can't be applied. A practical ...


1

Apple doesn't say outright how much power you can draw via a lightning to usb host cable or adapter but its about 200 mA before the phone alerts you. So unless you have an externally powered hub this isn't working at all. The current ratings for your devices should be the maximum they draw. That may be the operating current or spikes. It may also be what ...


1

For a servo position control loop then using a tacho-generator can reduce the speed at which the motor approaches the optimum demanded position. This means that there is less overshoot because the mass of the "thing" being moved is less likely to significantly overshoot the demand point because it doesn't have as much momentum/energy. Because a ...


1

Ohms law can be extended to volume resistivites, you need to know the volume or surface resistivity Source: https://www.napson.co.jp/wp/wp-content/uploads/2014/08/%e5%9b%b3_en-01.png


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Your capacitor M2 needs to have one end grounded, Otherwise your schematic looks OK. The capacitors are always connected to ground when simulating a mass , this is because inertia is referenced to a stationary reference frame. So for example if you push on a mass, you create a reaction force to ground with your feet, but the reaction force for the mass is ...


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