HIFEI Technology Fulcrum Series Manuel - Page 3

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Fulcrum Pro/Pro+ 300A Brushless Speed Controller Manuals

ⅡE: Fulcrum Pro/Pro+ 300A ESC Parameters Features

Low voltage cut-off (LVC):

Low voltage cut-off can protect battery from discharging too low and causing permanent

damaged to battery, especially important for Lithium polymer cells. It is strongly recommend to set the

LVC carefully before running.

E.g: if you use 2S(2 Lipo in series), you can choose '2s cells'; if you use 4S 1P battery packs, please set it

at '4s cells'.

Cutoff Voltage/ cell :

The setting is to set low voltage cut-off of each Lipo cell.

E.g: if you set the LVC of per Lipo cell at '2.8V', the LVC is set at '2s cells', then the cut-off voltage of

the whole battery pack is '2.8*2'=5.6V; if the LVC per Lipo cell is set at '3.2V', the cut-off voltage of

whole battery pack is '3.2*2'=6.4V.

Current Limiting :

'Sensitivity'

setting is low over-current threshold, will shut down rapidly.

'Standard'

is moderate over-current threshold, will shut down after a slight delay.

'Insensitivity'

is high over-current threshold, will shut down after a slight delay. Recommend

only experienced modelers would change to use this programming feature.

'Close'

current limiting detection disabled. only experienced modelers would use this option.

Brake type :

'Brake disabled'

setting will close the brake function;

'Soft brake'

will provide 20% of full braking power.

Timing advance :

'Low timing'

setting adjusts the timing at the range of 0º~15º, recommended for more lower

pole count brushless motors (such as 2 poles, or 4 poles). It gives more power and slightly less efficient;

'Middle timing'

adjusts the timing at the range of 5º~20º, recommended for most brushless

motors. It gives a good balance of power and efficiency;

'High timing'

adjusts the timing at the range of 15º~30º, recommended for higher pole count

motors. (such as 8, 10, 12, 14 poles or higher brushless outrunner motor)

'Auto timing'

setting is automatically adjust the timing degree according to motor's rotating

demand.

0°; 2°; 4°; 6°; 8°; 10°; 12°;14°; 16°; 18°; 20°; 22°; 24°; 26°; 28°; 30° are specific options for

timing advance.

Note: These options can be only set via software 'Hifei V4.03' or newer version, which was released after 4 Dec., 2012.

If you want to upgrade your old version software to have these timing advance, please download the software from

www.hifei.com.

0º and 30º are special settings, can be only selected for some special motors with manufactures special requirements.

www.hifei.com

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Fulcrum Pro/Pro+ 300A Brushless Speed Controller Manuals

Cutoff type:

Cutoff type settings decide the way in which the ESC cutoff output to brushless motor when

the LVC works, or temperature/ signal-lost protection works.

'Hard cutoff':

when the battery volts discharges to the set LVC value or soft protection

works, the motor will shut down immediately. Motor can be restarted by closing the throttle to the

lowest position and re-move the throttle as normal.

'Soft cutoff':

when the battery volts discharges to the set LVC value or soft protection

works, the ESC will slowly reduce motor power to zero, you will notice a decrease in power and it is

time to dock.

Startup type:

'Soft start':

very soft and smoothly start the motor, it will take more time.

'Standard start'

: start the motor at normal speed, it depends on the motor's quality and

dynamic response.

'Fast start':

start the motor fast, recommend this for racing.

Governor mode:

'Auto'

recommended for general fixed-wing aircraft.

'Low RPM'

recommended for collective pitch helicopters. Used for low pole count motors

and low RPM on higher pole count motors.

'High RPM'

recommended for collective pitch helicopters. Used for higher pole count

motors and higher RPM.

Note:

a. The poles mentioned above is the magnetic poles of brushless motor, not the stator numbers of

motor.

b. It is strongly recommended to have bench testing and choose appropriate parameters for your

configuration before assembling the ESC to hull for running.

www.hifei.com

Page 6