The recommended safe voltage range for 84200HP is 12V-84V. In fact, the withstand voltage of motherboard components is 100V, but we need to reserve a safety threshold.
In fact, in many cases, we can observe that when the motor decelerates or brakes suddenly, the reverse current flowing into the power supply will cause the power supply voltage to rise. Therefore, it is necessary to ensure that the peak voltage of the component is not exceeded during the rise.
Thanks, but the voltage was not in question, my question is, 200 amps max, battery or motor amps?
The labeled current refers to the motor current, as the MOS transistor acts on the phase line.
If the mos is rated at 100v/380a per your first post, what limits the 84200 to 200a?
Currently Iām running this esc at 200 battery and 200 motor 20s 8p Iāve finally got it tuned decently on my sonās dirt bike, but Iām curious because on the vesc tool it showed I pulled 160-180a under hard acceleration but the output listed as power max w was only 7.5kw, thatās only 90ish amps at 84v (Max charge)
There are many limitations on current. In addition to looking at the conventional parameters given in the specification, it is also necessary to analyze from the following aspects:
In actual applications, we cannot only look at the parameters given in the specification, but also need to check the working conditions required to achieve the parameters.
For example, by observing the safe operation curve of the MOS tube specification, it can be found that the MOS tube can only be turned on for 10us at a 100V operating voltage with a 380A current.
it sounds like youāre not running near max duty cycle, if youāre at āhalf voltageā i.e. 50% duty cycle battery current will be only half of the motor/phase current
as for the 200A restriction, there are other components that can get hot like the shunts, in theory at 200A youāve got 6W of heat loss over the 3 shunts, 15W on 300A and 26W on 400A
those shunts are pretty small so 8W is a lot for a small shunt
the mosfets themselves are super low rdsON but still 10 fold higher resistance than the shunts (1.2mOhm vs 0.5mOhm x 3 = 0.16666mOhm), even if there are 2 in parallel thats still 0.6mOhm or 0.0006 ohm, in ideal conditions, rdsON is affected by heat and current and some other things, but at 200A a single pair of mosfets are dissipating 26W+ (so 52W+ in reality)
at 400A that would be 96W+ per pair or 192W+ total, which is a lot unless its force air cooled or water cooled, and as i said rdsON is only that low under ideal conditions, could go well up to 500W under 400A conditions due to temperature and whatnot which ofcourse aint idealā¦
ouch, out of curiosity and good luck with my 84200HPās (no issues) i ordered a pair of 84100HPās for another project
hopefully that wont be a regretful one and no issues
dumb question, are you still using a loopkey etc?
like if you do you should still use an antispark XT90-S or similar to connect them first, regardless of it having a shutdown mode
Ok so far they seem really good in my case, my 84100HPās literally arrived yesterday, when my oldest (FSESC) 75100 Alu PCB literally died aswell lol (was in use for 2 years)
i done 2 rides and went pretty hard on the throttle
note i have relatively low kv electric scooter motors
but all i did was use large outrunner, raised the max wattage loss a lil bit and configured ADCās, runs like a dream without even tweaking it at all
low speed torque at 2x 90A phase seems better then when i had a 75200 alu pcb @ 150A phase and 75100 alu pcb @ 120A phase in there (both with Jaykup firmware)
current and back emf measurements also look really clean in vesc tool
heya i really like them, it would be cool if there was a more water resistant version of the 84100 and 200HP, but not potted and not a āwatercoolingā version
so basically the 84100 and 200HP with a different top and perhaps bigger (deeper fins mainly, not larger controller, just in height obv) heatsink albeit heat dissipation seems fine to me, together with the improvements like ceramics, maybe some more mounting holes so the board is secure in the mid aswell etc, and waterproof connectors
i use mine for dual motor electric scooters so the phase wires and hall cables are quite long, i think it would be even better if i would be able to mount them alot closer to the motors due to less induction on the hall lines and in the cables in general (more accurate measurement and less possible variables) and ofcourse less length on the phase wires
I fried mine during a motor wizard setup. Believe I forgot to turn down regen braking and the reverse current fried it. How did u remove the top circuit board?
Hi, I have the 84100hp version. I donāt think I turned down the regen during a motor wizard setup. It was doing OK and then went into reverse rotating very quickly and then shorted out. It wonāt power on now and has continuity between the negative and positive leads. Could it be as simple as changing out the capacitors? I donāt see any physical issues or any black spots anywhere.
Hi, have 84100HP and a xiaomi PRO 2 battery, a 36V 10s. Everything goes fine. But I am unable to connect another custom made battery, a 13s 48V one to the 48100HP VESC. This battery is working and being used on another PRO 2 scooter with xiaomi controller. When I connect to the mks, the blue light starts for some milliseconds and next the board immediatly shuts. Can you help me find out the problem? When i connect again the 36V battery the VESC turns on again and works flawsly. I am stucked on this. So far could find some makerbase contact if you know one please shareā¦ Luis
both batteries have internal BMS. When i connect the 48V, theres a great spark in the XT60, but its the same if I connect the 48V toi the xiaomi controller and the set works ok on there
Hello, Iām sorry that it took so long to reply to you. I seldom log on to esk8 now (for work reasons). Wrong setting of regenerative braking leads to the breakdown of MOS tube, which is the most common situation I encounter. Generally speaking, it can be repaired only by replacing the burnt MOS tube.
Because time has passed too long, have you contacted the customer service of the AliExpress seller to handle the problem for you?
This seems to be because one of the half bridges of the MOS tube was broken down, which led to the shutdown of the motherboard when the control board sent a control signal to calibrate the offset.
Have you contacted the customer service of the AliExpress seller? Generally speaking, he will give you a new motherboard or get a discount. You may need to recall what you did before to avoid the same problem after replacing the motherboard.
