how is digam powersoft. what is it secret ?

[noah katz]

Originally Posted by simon7000

Powersoft use a switching power supply and a switching amplifier. What is not clear is if it has a tracking power supply.

What would the benefit of a tracking PS be with a switching output stage?

[sofaspud]

To think (let's call it) "misrepresenting the truth" is the domain of some particular economic system or nationality is either bias, naiveté, ignorance, or stupidity. It's an equal opportunity employee.

[simon7000]

Originally Posted by noah katz

What would the benefit of a tracking PS be with a switching output stage?

Even with a switching amplifier there is power dissipated when an output device is shutting off. If there is no dead time between the top going off and the bottom going on (or vice versa) there will be a surge of current when both are partially on. With a dead time between on and off there is still stored charge. So lowering the rails reduce energy wasted and more importantly heatsink requirements.

As there already is DSP driving the amplifier it costs less to modulate the power supply than to buy bigger heatsinks.

of course I could be wrong my info comes from the sales side.

[AP2]

Hi,
Some PA high power application, as i said in other thread, uses digital dt controlled by cpu. this system allow a very energy saved, becouse change (or switch at zero bias) in realtime,depeand level of input and current output.
some use this + special smps (without traditional big capacitance after AC rectifier). result can be for very high peak power output >7000w. even if declared for short time.
One important of this, is very small dissipation.

Regards

[Calvin]

Hi,

used a couple of their amplifier modules für home subwoofer usage and am quite confident with them. They work reliable, are professionally manufactured and build compact. All modules I used came with powersupply, some with PFC.
They featured digital filter options either as push-in module or onboard.
It took me quite a long time searching for powerful class-D with all those features included. Since I use the amps for home appliances the question of the power specs are not that stringent as it would be for PA appliance.
Anyway, Powersoft publishes their specs and measurements and the measurement conditions and to which standards they comply.
There´s no obvious reason -at least for me- to mistrust that they offer good products.

jauu
Calvin

[Pafi]

Originally Posted by gatabil

hi Eva,

an interesting approach. I guess you're right. but If learn everything is simple.
of course did not come from space digam. but We the people always investigate unknown.

an example. I'm guessing the output layer is full bridge. But talking about 9000kw power how is mosfets Qc value of how low . What is the energy efficiency

gatabil!

Your sentences are pain to read. Learn syntax! Clean your vocabulary! And care about the right numbers! 9000kw??? No! 9 kW!

About your questions:
- Use google! http://www.musicainretecomo.com/Publ...cumenti/19.pdf
Here you can find the power stage efficiency, topology, and some other datas! (Note the "nominal power"!) The question still remains is how long maximal power can be sustained.

- Qc. What could it be? And why is it important?

- Is 9 kW a mistery? What about 40 kW? PKN Controls

[darkfenriz]

A first good indicator of real power comes from comparing sizes to similar wattage UPS or frequency converter/motor driver.

[Pafi]

Originally Posted by darkfenriz

A first good indicator of real power comes from comparing sizes to similar wattage UPS or frequency converter/motor driver.

I totally disagree. This ignores soooo many differences!

[AP2]

Hi,
what is the minimum threshold (ie the duration of the pulse), the human ear perceives the power (spl)? new studies on the Man, new concepts applicable to the amp.
we have a quick perception of the change in environmental pressure, and a lot of hysteresis on the perception of thd, (if it is contained in the impulse). that's all.

regards

[darkfenriz]

So, do I just need PKN amplifier, a sound card and a bit of space on the desk (2U rack size?) to create a 55 horsepower Variable Speed Drive, that would otherwise weight like 150kg and take a cubic meter or so? Come on...

Lemme give an example:
http://www.gamatronic.com/en-us/prod...owerplus-ups/5
This is one REMARKABLE power density 10kW UPS (aka. 3x3.3kW class D online amplifier amplifying just 50Hz sine all the time).
Keep in mind it uses audio-range switching, no high power transformers (on-line, no isolation from mains), 3-level IGBT inverters and other efficiency tricks which could hardly be used in fullrange audio amp. Got anyone thinking?