RC-Monster Forums - View Single Post - Is ABS breaking safe for brushless systems?

BrianG · 02.27.2011, 01:32 AM

I honestly don't know how any radio can have anything resembling ABS (seeing as how it means Anti-Lock Braking) unless it is getting tire slippage feedback. Otherwise, it's just variable braking.

Yes, there can be voltage/current spikes in any type of ESC braking. Some ESCs, like the MMM, have TVS devices that basically shunt any voltage above X value (X is usually a couple volts above the absolute max the ESC is designed to handle) to ground to protect the ESC/batteries from excessive voltages. The amount of brake force, battery voltage, vehicle speed, and weight of the vehicle will determine how high those spikes are. If you want to help the ESC cope with lots of braking, try using a battery voltage less than the ESC's max. So, if using an ESC rated for 6s, use 4s or 5s instead. The spikes will not be as high so the TVSs won't be stressed as much.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	02.27.2011, 01:32 AM I honestly don't know how any radio can have anything resembling ABS (seeing as how it means Anti-Lock Braking) unless it is getting tire slippage feedback. Otherwise, it's just variable braking. Yes, there can be voltage/current spikes in any type of ESC braking. Some ESCs, like the MMM, have TVS devices that basically shunt any voltage above X value (X is usually a couple volts above the absolute max the ESC is designed to handle) to ground to protect the ESC/batteries from excessive voltages. The amount of brake force, battery voltage, vehicle speed, and weight of the vehicle will determine how high those spikes are. If you want to help the ESC cope with lots of braking, try using a battery voltage less than the ESC's max. So, if using an ESC rated for 6s, use 4s or 5s instead. The spikes will not be as high so the TVSs won't be stressed as much.