2018年2月22日 · 4) The switching frequency (for the drive) should be set somewhere between 3 and 5 kHz - note that in the OP's original post, it was indicated this had been set to 2.5 kHz. 5) According to the drive manufacturer documentation, A SINE WAVE FILTER IS REQUIRED - REGARDLESS OF CABLE DISTANCE BETWEEN DRIVE AND MOTOR.

2014年9月5日 · Secondly, Brian, the frequency is just a simple RC time constant: 1/(2*pi*820e-12*9.76e3) = 19.886 kHz. Thirdly, sorry for the sampling/data I showed, those were just quick and dirty pics for me. I can assure you the frequency is correct for all the circuit versions I tested so far. Also the rest of the pics are taken with the same parameters

2010年9月28日 · What kind of VFD's are you using. Do they have switchable modulating frequency? If yes use lowest frequency may be 4 khz. The manufacturer of the VFD's have to recommend proper solution, using of reactors or not is a part of IGBT switching frequency and the distance together with the type of cables you are using.

2002年5月29日 · It sounds like a core heating thing. To be able to judge if that is the case, one needs to look for capacitors (or long cables) to resonate with. Reactor/capacitor combinations often have a tendency to ring somewhere between 5 and 20 kHz and that is an extremely effective frequency when it comes to induction heating.

2004年12月8日 · IR is in the THz range and ultrasonic is above about 20 kHz . Upvote 0 Downvote. May 8, 2008 #7 IRstuff

2005年7月18日 · I generally share the signal and power ground together for analog(and mixed circuits <1 KHz).Does this practice introduce noise in the system. The circuits many times does not work if I separate them, so I am forced to do it to make it …

2018年10月18日 · It's a non-linear device. Running with a NORMAL 50% duty cycle in the kHz doesn't reduce the temperature 50% it reduces it MORE THAN 50% because running an LED at a lower temperature causes it to have less losses. If you leave it off for 5 years you simply haven't used 5 years of its lifetime. Barring environmental issues as mentioned prior.

2022年7月16日 · Hello, I am trying to conduct random vibration testing using a electrodynamic shaker table. In testing there is a resonance (~1975 Hz), caused by the shaker assembly itself, within the the desired spectrum (10-2000 Hz). This resonance cannot be controlled and is preventing our response PSD from...

2005年7月8日 · As far as Cannons' Technology, it is simply a case of their 12.5 Khz signal being shunted to ground due to the low impedance of the caps at that frequency (which is the reason for the blocking units).

2004年3月24日 · Yes. It makes quite a difference. The Q will go down the sink if you get a single shorted turn, regardless of where in the coil. The Operahouse method could be applied easily, especially if an elevated frequency is being used. Something like 10 kHz seems to be right.