Welgard manual of 80a brushless esc


Manual of 80A Brushless ESC

Basic Features:

Voltage Range:6V-30V

2-7 lipo, 12-20 NC

Internal Resistance:0.00125ohm


Single lipo protection 2.9V per cell

Size: 77x36x8mm

Continuous working current:80A

Instant working current: 90A

Temperature-protection:100 Celsius Degree

PWM: 8K/16K optional

Support most types of motors, the rotation speed can be up to 40000RPM for 14 poles magnet)

Additional Features:

Soft start

Start prohibition if the throttle position is wrong.

Auto learning on the throttle response

Auto shut down of the power if the signal is wrong

Auto calibration of the motors

If there is no response on the receiver, the input will be automatically shut off

The 80A ESC is programmable for battery type and number, throttle settings, brake settings, direction of motor rotation, timing mode and PWM. We suggest that you do not adjust the timing and PWM unless you know what you are doing. It is generally not necessary to change these settings.

CAUTION: Secure the aircraft and stay clear of the propeller attached will damage the motor.

CAUTION: Running the motor at high RPM without a propeller attached will damage the motor.

Connecting the Motor:

Note the wiring diagram below:

Solder an appropriate connector on the battery + (red) and battery (Black) leads. We recommend Deans Ultra or Anderson Power Pole connectors. If using a polarized connector, make sure the polarity matches your batteries, and make sure your connector can handle 60 amps of current.

Connect the three motor wires to your brushless motor (ignore the wire colors). If the motor spins in the wrong direction, swap any two of the motor wires to reverse the direction. We recommend using gold plated spring connectors (also known as bullet connectors) between the motor and the speed control to facilitate swapping the wires. Make sure to cover the bullet connectors with heat shrink tubing.

Plug the servo connector into the appropriate channel on your receiver. Most receivers use channel 3 for the throttle, but some use channel 1. Consult the manual for your receiver for details. The red wire on the servo connector is positive (+), the brown or black wire is negative (-), and the orange or white wire is the signal.

4. Make sure your transmitter throttle channel is not reversed. Most Futaba transmitters have the throttle channel reversed by default.

Before flight, you can program the battery type, number of cells, and cut-off voltage. See the next page for programming instructions.

Install your ESC in a location in your airplane that receives good cooling airflow. Keep the motor and battery wires away from your receiver and antenna.

Battery Elimination Circuit (BEC)

This ESC does not contain BEC.A regular airborne battery pack must be used to power the receiver and the servos. It is not necessary to cut the red (+) wire on the throttle lead from the ESC as it has been disabled internally.

To Enter Programming Mode:

1. Disconnect all batteries

Connect the motor and receiver to the ESC

Turn on the transmitter and set the throttle to full power

If you are using a separate receiver battery pack instead of using the BEC, connect the receiver battery pack and turn it on.

Secure the airplane and stay clear of the propeller

To Select a Program Mode:

1. Connect the motor battery to the ESC.

After a moment, you should hear the initialization music.

3. A sequence of long tone followed by one or more beeps. Each sequence represents a parameter that you can program and is repeated 3 times. The parameters are:


Long tone+1 Beep

Cell Type and Number Of Cells

Long tone+2Beeps

Throttle Mode

Long tone+3 Beeps

Brake Mode


Long tone+4 Beeps

Rotation or Cutoff mode


Long tone+5 Beeps

Timing Mode


Long tone+6 Beeps

Pulse Width Modulation (PWM) Setting

When you hear the sequence for the parameter you wish to program, move the throttle stick to the center position.

The controller will then start beeping a more code sequence of shout and long beeps representing the possible options you may choose for the selected parameter. The number of short beeps tells you which parameter is being modified, and the number of long beeps tells you which option value can be selected. See table 2 for a list of all programmable options. Each option sequence is repeated 3 times. When you hear the sequence for the option you wish to select, move the throttle stick back to the full up position.

The controller will then save the selected option, and sound a long beep as a confirmation. It then goes back to the beginning of the programming sequence (step 4) the lowest (down) position. The controller will save all options and re-initialize in normal running mode so you can start your motor.

The table below summarizes the various programming options for each parameter:

1. Cell Type and Number of Cells


1Short +1Long

Ni-Mh/Ni-CD Auto Cell Count-0.8V/Cell Cut off Voltage

.- -



7s(25.9V)-20.3Cut off Voltage

.- — -



6s(22.2V)-17.3V Cut off Voltage

.- — - -



5s(18.5V)-14.5v Cut off Voltage

.- — - — -



4s(14.8V)-11.6V Cut off Voltage

.- — - — - -



3s(11.1V)-8.7V Cut off Voltage

.- — - — - — -




Cut off Voltage

2.Throttle Setting


2Short+1 Long

Auto Throttle calibration

..— -

2Short+2 Long

1.1ms to 1.8ms

Fixed Throttle

..— — -

2Short+3 Long



..— — — -

2Short+4 Long



3.Brake Setting


3Short+1 Long


…— -

3Short+2 Long

Soft Brake

…- — -

3Short+3 Long

Medium Brake

…- — - -

4Short+4 Long

Hard Brake

4.Rotation Direction/Cut off Type


4 Short+



….- -




….- — -



Soft cut power

….- — - -



Hard cut power

5.Timing Mode





…..— -


2 Long


…..- — -




…..- — - -






6 Short+1Long


……- -

6 Short+2Long


To Exit Programming Mode:

You can exit programming at any time by moving the throttle stick to the lowest position.

CAUTION: Moving the throttle stick to idle arms the motor. If you advance the throttle stick the motor will run. If you are not ready to fly, unplug the motor battery and then turn the transmitter off. Always turn the transmitter on (and the receiver if you are using a separate receiver battery) and be sure it is set at idle position before connecting the motor battery.

All of your selected programming will be saved in the ESC. There is no need to program again unless you wish to change a setting.

Note: If the motor rotates in the wrong direction, simply sway any two of the three wires from the speed controller to the motor.