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Understanding the Tesla Model S | Power Electronics ( 8 )

The electric battery

Explanation No. 8 in this lesson,same compressor that's used in the Model 3 as well and   it can be used in R134a systems or the R1234yf refrigerant systems it has a two-wire electrical   connection DC input it has its own built-in inverter where it inverts it into ac   and drives a little three-phase high voltage motor in here to run the air conditioning   compressor at variable speeds it has a low voltage logic connection here for can serial   data communication to the controller and this connection this dc connection to run an ac motor   is picked up off this bottom blue connection right here on the high power distribution module.

Power supply to DC converter:

so we'll plug that in so there's our air conditioning compressor our next   uh component that connects to the high voltage distribution block here is the dc to dc converter   this is the DC to DC converter for this vehicle we have two wire high voltage 400 volt or so power   being fed to the DC to DC converter, it has an input from the manufacturer Delta Electronics says   maximum input is 430 volts at 15 amps and then it says the maximum output which is incredible   is 9 to 16 volts 2500 watts maximum well that gives us at 14 volts   output on this red terminal right here remember we have DC voltage coming in high voltage 400 volt   we the DC to DC converter takes high voltage DC and converts it down to low voltage DC   but it steps up the current with the same ratio that it stepped down the voltage and so we can   have 14 volts with what did I calculate a maximum of 178 amps to reach that 2500 watt maximum output   178 amps that's very impressive. most vehicles don't even non-hybrid and non-electric   vehicles don't have an alternator that puts out that much current so that's pretty   impressive this cable right here goes to the underhood junction block for your fuse block and   your 12-volt battery. This is what charges the 12 volt battery as you see right here in this photo   underneath the hood this 14 volt output this little cable right here off this terminal   right here this would be the equivalent of battery negative cable so it would go to the   chassis of the vehicle that I have on the hoist here and then battery negative would be   connected to that same vehicle chassis so this is the dc to DC high voltage DC to low voltage   DC converter as you can see it's liquid-cooled um this gets pretty hot uh at maximum output or close   to maximum output needs to be cooled and so this electrical connector right here this two wire one   is going to plug into our distribution block picking up power off of a 30 amp fuse   where the air conditioning compressor was the big 40 amp fuse.

Battery Heater Wattage:

 so we'll plug that in   that is our dc to dc converter output now our next output off of our high voltage   distribution block here is the battery heater so this is the battery coolant heater   we have an inlet and an outlet I'm not sure which one is the inlet which one is the outlet we have a   high voltage two wire connection here for dc power and then we have a two wire electrical connection   I assume it is for uh communication uh or control of the battery heater this battery heater   I don't see a rating for its wattage the previous one I accidentally bought the older   version and I think it said 6300 watts or 6.3 kilowatts if you guys know what the battery heater   wattage usage is on a cold day when you start up the vehicle can you see how much power the   battery heater is using let me know in the comments down below but this battery heater   is the one that uses that circuit board inside of the junction block so it has   a 30 amp fuse but then it goes through those transistors on that circuit board for control   whether it be just on-off control or variable control I suspect it's variable but this   is going to bolt up right here on top of our DC to DC converter that's where it sits in the car   is right up right above the dc to dc converter and then the electrical connector for it goes in this too many pieces here in the second electrical connection down plug that in and then our very last connection is for the cabin heater   the heater that heats the air for inside the passenger compartment this car does not have   any type of liquid heater core does not use heat from the battery or the electric motors to , We move to the explanation number 9 of this lesson.

 

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The new second generation of 100% electric vehicles

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Understanding the Tesla Model S | Power Electronics ( 2 )

Power Electronics   Continue the explanation of the first lesson to fully understand the idea. You can see the big poster here that says 48 amps means that 48 amps is the maximum power this can take from the second level AC charger that you connect to a Tesla destination charger and 48 amps is double the 240 volts at the destination Tesla Cha will give us a rger of 11520 watts or 11.52 kilowatts of charge that this unit can provide for the high-voltage battery. Explanation of installing connections:  So let's take a look at the connections around this thing. We have the coolant inlet port here on the passenger side. If you look at this article from under the passenger seat of your Tesla , you can see that we have a logical low voltage connection here. We have the coolant hose actually coming from. The inverter set on the engine and the drive unit underneath the car and then that passes through the big heatsink here and exits this side and then goes up to the front of the car on th
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Understanding the Tesla Model S | Power Electronics ( 6 )

  electric car Explanation No. 6 in this lesson,right part number but it's   it's very similar uh i uh this information is at pyroswitch.com you can go look at the different   pyro switches that are made by auto leave but anyway I thought it was very interesting i   totally disassembled this yesterday and then put it back together as you can see in these   photos . New console top performance: it has a little circuit board it has a shunt circuit a parallel current circuit   uh where it appears to be watching the amount of current going through the pyro switch so this is a   pyroswitch made by auto leave there's a circuit monitoring the current going through it and   once the current going through it reaches some predetermined level I don't know what that is   uh on the press release for the p90d it said 1500 amps but the P100D is even more powerful so it   it probably has a higher rating but as soon as it gets to whatever rating tesla has decided   it's going to cap
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