|VESC Firmware||VESC 410&411&412||VESC 60||VESC 75_300_R2|
Current Sampling Resistor
Two 1mR domestic manganese copper resistors
Three 0.5mR imported manganese copper resistors
Nine 0.5mR manganese copper resistors or alloy resistors
FSESC 75100/75200: ×
FSESC 75300/75350: √
Since there are many ESCs with different specifications in the 75 series, for more detailed data, please check the blog "The Differences Among FLIPSKY 75 Series ESCs"
1. Voltage Range:
V4 series ESC: 8V-60V (safe 3S to 12S Lipos)
V6 series ESC: 14V-60V (safe 4S to 12S Lipos)
75 series ESC: 14V-84V (safe 4S to 20S Lipos)
The vesc_tool default max. voltage is 72V only, so when we use the battery over 72V, overvoltage error fault code reminder will happen. In this case, please do firmware update and choose the no_limit to change the voltage to be larger.
Step 1: Download the no_limits firmware version
Step 2: Set the maximum voltage.
V4 series ESC: continuous current 50A(single), 100A (dual) , peak current 150A(single)，300A (dual)
V6 series ESC: continuous current 60-70A(single), 120-140A (dual), peak current 200A(single)，400A (dual)
V6.9: continuous current 100A (single), 200A (dual) , peak current 200A (single)，400A (dual)
75 series ESC:
75100: continuous current 100A (single), 200A (dual) , peak current 120A (single)，240A (dual)
75200: continuous current 50V/200A, 75V/150A; peak current 300A
75300: continuous current 50V/300A, 75V/200A; peak current :350A
75350: continuous current 50V/350A, 75V/250A; peak current :800A
Application voltage and current are main differences among them. So, if you're not using so much higher current, V4 is a good option due to it's far more cheaper than V6. Choose the escs per your battery voltage, current needs, speed requirement etc.
Motor ERPM= motor speed (RPM) * motor pole pairs
V4 ERPM: 60000
V6 ERPM: 150000
75 series ERPM: 150000
To make sure the compatibility, please make sure the battery voltage within specifications and the motor ERPM does not exceed that of the ESC.
Motor RPM= battery voltage*motor KV value
Motor ERPM = RPM* motor pole pairs=battery voltage*motor KV* motor pole pairs
Setting 6374 motor 190KV in battery 60V as an example:
motor max RPM=60V*190KV=11400, ERPM=11400*7(14 poles, 7 pairs)=79800
ERPM=79800>60000, the 6374 motor working at 60V voltage is not suitable for V4 series ESC.
In this case, you can reduce the working voltage or reduce the motor KV to be compatible with the ESC.
4. Current Sampling Resistor
The current sampling of V4 series ESC uses 2-shunt resistors (2 manganese copper resistors).
The current sampling of V6 and 75 series ESCs use 3-shunt resistors (V6 series-3 manganese copper resistors; 75 series-3*3anganese copper resistors).
Therefore, the current sampling accuracy of V6 and 75 series ESCs is higher, and there will be no current ripples.
The V4 series adopts low-side current sampling, and the V6 series and 75 series can use both phase terminal current sampling and low-side current sampling.
The V6 series and 75 series ESCs have a smooth linear acceleration from 0 to full speed for the built of three shunts.
Hope this blog could be helpful.
For more tutorials and new product introductions, please follow our social media: