wattage of DC-DC converter ?

[HeadsUp]

does anybody know the wattage of the high voltage DC-DC converter ?

i mean the one that converts 200 volts DC up to 500 volts DC on the 2003 > models

[ias513]

I saw this yesterday online. I think this was a Gen2. Does anyone know the wattage for a gen 1?


In the Prius, the DC-DC converter (which is equivalent to the alternator in a normal car) is limited to 100 amps. Power = volts × amps, so in the Prius, we can get a total of 13.7 × 100 = 1,370 watts out of the 12-volt system. From the online forums, it turns out that the internal Prius electronics take about 300 watts, which leaves about 1,000 watts available for external use,

Here is the link...

Pressed for Details: Hybrid car powers home during blackout > The Harvard Press

[HeadsUp]

thanks but you didnt read the question

i want the wattage of the converter which converts 200 VOLTS UP TO 500 VOLTS

that 500 volts is then fed to the motor controller

the one you are talking about is for accessories only




cheers

[dogfriend]

Its a little more complicated than that.

VH boost

[Ct. Ken V]

Hi, HeadsUp,

I'm not any form of electrical engineer, so I can't answer your question for you & I'm not trying to be critical here of you. But the heading of your thread asks for the "wattage of the DC-DC converter". The DC-DC CONverter changes your 202 VDC from your HV (traction) battery to about 14 VDC to charge your little 12 VDC battery (which I think ias513 was answering for you).

But in the text of your post you seem to ask a different question (about the conversion of 200 volts to 500 volts). That is actually the INverter which changes the 202 VDC from the HV (traction) battery to 500 VAC (alternating current) for the AC electric 50KW traction (drive) motor.

And the model year(s) you are asking about seems to say 2003 and newer models, but it should be 2004 & up models because the 2003 model year was still the smaller "Echo" sized "Classic" Prius with the trunk instead of the hatchback. I believe the 2003 "Classic" had a 375 volt battery & drive system (& NOT the 202 VDC to 500 VAC system).

I hope an electrical engineer can read your question better & provide you with the answer you're really looking for.

Ken (in Bolton,Ct)

[HeadsUp]

Originally Posted by Ct. Ken V

Hi, HeadsUp,

I'm not any form of electrical engineer, so I can't answer your question for you & I'm not trying to be critical here of you. But the heading of your thread asks for the "wattage of the DC-DC converter". The DC-DC CONverter changes your 202 VDC from your HV (traction) battery to about 14 VDC to charge your little 12 VDC battery (which I think ias513 was answering for you).

But in the text of your post you seem to ask a different question (about the conversion of 200 volts to 500 volts). That is actually the INverter which changes the 202 VDC from the HV (traction) battery to 500 VAC (alternating current) for the AC electric 50KW traction (drive) motor.

no

the DC-DC converter is separate from the AC motor controller , it steps up 202 volts DC to 500 volts DC and then that is connected to the VFD motor controller which converts it to AC as a variable speed drive.

it is also bi-directional , it acts in reverse , carrying the regen current and converting 500 VDC back down to 200 VDC to charge the battery

i want the wattage of the DC-DC converter as mentioned correctly in my first post

[hobbit]

First of all, the boost converter is in 2004+, not 2003. I don't
know how much power it's rated for, but consider this: the nominal
max battery current in and out is 100 amps. [Rarely we see
peaks slightly above that but not for long, and the pack is
fused at 120A.] At full regen when the pack is around 250V
instantaneous that's 25 kilowatts on the "200V" side; obviously
less current but higher voltage at the motor for equivalent
power. Now, MG2 [the big one] is rated for 50 kW peak, I believe,
which presumably would have to be fed by the doubled-up side of the
inverter rack, but there's no way the battery is going to deliver
or accept that on its own. What's probably more important than
"power handling" in terms of the buck/boost converter is just how
much current it can handle without getting too warm or blasting the
bejeezus out of some transistor dies. The power dissipated *across*
the circuit is probably very low by comparison, and we count on the
mass of the inverter frame and that always-running coolant loop to
whisk that excess away from the important bits in short order.
.
I haven't answered the question, but hopefully have gotten your
thinking into the right order of magnitude. At a very outside guess
I'd say somewhere between 25 and 50 kW to have a nice safe envelope.
Compare the die and bond-wire sizes of the inverter-rack vs. the
boost-switch transistors, consider the real-life feed current at
up to a 300V delta, and you can probably get close.
.
_H*

[ken1784]

Originally Posted by HeadsUp

i want the wattage of the DC-DC converter as mentioned correctly in my first post

The (boost) DC-DC converter is located between HV battery and MG1/MG2 DC-AC inverters.
The max wattage depends on the max power of the HV battery which is 25kW. (27kW on the Gen3)

Ken@Japan

[HeadsUp]

Originally Posted by ken1784

The (boost) DC-DC converter is located between HV battery and MG1/MG2 DC-AC inverters.
The max wattage depends on the max power of the HV battery which is 25kW. (27kW on the Gen3)

Ken@Japan

thankyou Ken

that tells me the maximum battery wattage but the DC-DC converter could be rated with a large safety factor

it is still guess work , the converter could be 50 kW for all i know

but thats why i am asking the question , if i am going to use the Prius DC-DC step up converter in another project i need to know its rating , i wouldnt be using the Prius battery pack.

i hoped somebody would have a spec sheet , or be able to look at theirs and read the information off the plate , the plate should say ;

minimum operating voltage cuttoff level
maximum input voltage
max current
max continuous power
max intermittant power
and temperature range

if battery max current drain is 100 amps then the rating could be 150 A x 202 V = 30 kilowatts or more

i am still guessing


thanks people.

[patsparks]

AS the DC - DC converter is an integral part of the HSD I doubt it has any spec plates.