Embedded Files
Electronic Speed Controller
MK8 is a VESC capable of handling up to 150VDC, succeeding previous Mk5, Mk6 & Mk7
Description:
Single motor controller equipped with 6 x TOLT MOSFET
Low side shunt current sensor
Up to 150V tolerant ~30S capable (32S with limited regen., DCDC converter rated 155VDC, bulk capacitors rated 160VDC, MOSFETs are the limiting factor)
75A Battery, 150A Phase (XT60 battery connector limited to ~60A continuous, AWG 12 wires to ~80A continuous,) Note that many others ESC have exaggerated specs! 150A is for guidance only
Optional Bluetooth module or MK8-LCM (mounted separate onto the removable cover)
Accelerometer IMU (LSM6DS3)
Automatic & manual shutdown (requires external N.C. momentary button, hibernation current ~30uA, long press to turn ON & OFF)
Compact aluminum case (possibility to make it watertight)
DC Input 12 Gauge silicon wire to XT60 Male
Phase Output 12 Gauge silicon wire to 4mm Female Bullet connectors
ADC1 and ADC2 internally equipped with 10k Ohm pulldown resistors
Aux. power outputs:
12V : 0.4A
3.3V : 1A
5V : 0.75A
Enclosure dimensions: 58mm x 68mm x 18mm, 130g
Connectivity: JST-GH-1.25mm (CAN, SWD, 2 x UART, HALL, ADC, SERVO, 12V), USB-C
Updates:
01/2025: "LP" for long button press firmware now support auto-shutdown
08/2025: Moving to 105 °C rated components so that temperature push-back can be set as high as "90-105" safely. Also, moving to LSM6DS3 IMU due to BMI160 scarcity
03/2025: More aggressive gate resistors value for faster switching and better overall efficiency. Aux. 12V output increased to 11.8V
11/2024: V6.05 firmware labelled as "LP" is for "Long Press" power button delay. Approx. 3 seconds button hold is required for turning OFF.
10/2024: Voltage clamping on ADC and HALL inputs
For using a momentary N.O. button instead of the default N.C., you can purchase one of those adapters:
https://carveworkshop.com/products/no-to-nc-button-adapter
https://flightpack.eu/products/19mm-nc-low-profile-button
Four 4.1mm holes are available to interface with external devices ( CAN, power switch, sensors, HALL) Use preferably with 3.7mm diameter Julet connector (HiGo Mini-B for ebike)
For application that does not require a 30s cell count e.g.: 18S, 20S, 24S or 28S you can request an MK8 with lower voltage MOSFET that will improve thermals and increase the VESC current peaks capability, see table below:
Additionnal informations:
Power ON/OFF button: Latching type button is supported, change the setting in VESC-tool->app settings->general->shutdown mode->Always OFF
5 to 10 seconds are needed at startup for the VESC to respond to the button input
Momentary button must be removed before a firmware update otherwise, the VESC might become bricked, bootloader is not pre-installed
Any VESC need precharge! Failure to do so might damage the MK8, especially at 30s!
"Volts in" value in VESC tool: Custom firmware with different #define V_REG can be compiled on request
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