YGE 90LV, 120LV and 120LV-K electronic speed controller (ESC)“K” with heat sink
Connect the Master J/R cabel to receiver throttle channel
or FBL System and the Slave into an empty slot. With
vbar read the manual for external governoring.
For security and liability reasons we strongly
recomend the use of a buffer-battery for the reciever
system. 4 cell NiCd/NiMh or 2 cell LiPo battery with
minimum 800mAh must be connected to the receiver
or FBL-system in parallel to the BEC.
After connecting the battery (red = positiv, black = neg.)
you hear 3 descending tones. Subsequently, follows a
number of beeps according to the cell number of the
connected Lipo battery. In case the transmitter stick is in
throttle off, you hear now 3 ascending tones.
You need to connect the motor to hear the beeps, as it is
the motor itself which acts as a speaker.
--- The ESC is ready for use. ---
If the motor turns in the wrong direction, exchange simply
2 of the 3 motor wires.
Use only clean and tight gold connectors for motor and
battery. Pay attention for the battery connector to choose
a polarity safe system. Exchange low-friction or oxidized
plugs and sockets. Because only tight sitting contacts will
ensure a high current flow, protect the speed controller
against dangerous voltage peaks and avoid
disturbances. With all ESC types, the entire wire length,
from the controller to the battery, may not exceed 25cm.
If longer wires are necessary, a Low ESR switching
capacitor of 330µF/25V should be soldered between plus
and minus wires every 20cm. You might also consider
using our capacitor module YGE Cap´s typ 5. Likewise
the motor wires can be extended. Then please twist the 3
lines, in order to minimize interference emission.
Note: Inverting the Battery polarity leads to heavy
damage and to the loss of warranty!!!
The speed controller has a fixed throttle curve setting, so
that with all usual transmitters the stop and full power points
are linearly connected. With all programmable transmitters,
the throttle range should be set to default (±100%), the
center point set to zero and throttle trim enabled.
Nevertheless, with some transmitter types the range needs
to be adjusted. For that the throttle endpoints have to be set
so that one notch before lowest stick position the motor is
stopped and that one notch before full power the motor is
actually at full power. Full power is indicated by the LED that
is completely turned off.
On delivery the Timing is adjusted to 18°, brake is set to mid
level, and the under voltage recognition adjusted to Lipo
mode 3.1 V.
If during spin up rpm variations (wowing or erratic sound) are
experienced, the timing must be increased. If no
improvement can be obtained at 30°, then the motor is
overloaded. Here a smaller propeller, a one cell smaller
battery or a stronger motor will help. If after motor stop you
hear 2 beeps repeating, it means that the battery voltage
dropped down below the setting value. Eventually try a cutoff
voltage of 2.9 or 3.0V per cell. If there is still no
improvement, then the battery is discharged or too weak, the
wires are too long or to small or a connector is out of order.
With an active brake you can hear these warning tones only
in windmill position. This is the small range on the throttle
stick between brake and motor start. You can reach this
position with 2 notches or with a high trim and a short gas
If no automatic timing is wished, it can be adjusted according
to the following guideline.
Inrunner 0 to 12°
Outrunner 18 to 30°
If your motor manufacturer indicates a timing
recommendation, it is of course preferable to use it.
Basic rule: the higher the timing the higher the full power
Type 90LV 120LV 120LVK
Overall dimensions in mm 64 x 32 x 13 64 x 32 x 13 64 x 32 x 19
Weight in g without/with wires 52/82 54/84 67/97
Cable diameter Battery/Motor 4² / 4² 4² / 4² 4² / 4²
The easiest to make these changes is the ProgCard III. There is
also the possibility to perform the setup with the transmitter;
however it will not be explained here. You will find it in the
RC-setup manual under www.yge.de in the Download area.
Please notice that the complete features set can only be
reached through the YGE programming card.
In case you get inadvertently in the programming mode
during a normal start-up (throttle stick at full power), simply
disconnect the battery, lower the stick to stop, and connect
the battery again. Thus you won’t modify the adjustments.
For helicopters in governor mode, the full throttle range
(100%) must be calibrated once. For some transmitters,
this range is indicated in the helicopter menu (throttle
curve 0-100%). This throttle curve will then correspond to
the controller throttle from 0 to 100%. Please refer also to
ProgCard or RC-Setup manual.
When activating one of the governor modes, all relevant
heli parameters are set to default. This default will fit
nearly all setups. You don’t need to program further at a
Here a listing of the default settings.
- Timing = 18°
- Brake off
- Act. Freew. on
- P-Gain = 0,9
- I-Gain = 0,05
- Startup Speed = Heli middle
- PWM-Frequency = 8 kHz )
- Startup Power = Auto 1-32% (sometimes is better 2 or
You should modify the default settings of P-Gain, I-Gain
and PWM frequency, only if you don’t get the desired
success, and if you are sure of the correct setting of all
Lipo protection / under-voltage protection:
Because of the tension driven load adjustment it is
possible to fly further with low power, since the battery
recovers with smaller load. However, if the tension
continues to break in, the motor is switched off.
The unlimited partial load capability refers to the maximum
full power current .
Temperature / overload warning:
If the speed controller’s temperature exceeds its limit,
because of overloading or lack of cooling, after landing
and/or motor stop, a warning signal is issued (3 Beeps in
the interval). But the motor is not switched off in flight
unless the temperature becomes extremely critical, then
the motor switched off.
The partial load operation between half and nearly full
power is the most difficult area for an ESC. In addition the
running time becomes longer and longer with the Lipo
technology. If it should come to repeated temperature
warnings, better cooling should be provided or current
should be reduced. These warnings are to be regarded as
overload warnings and not as normal operating
condition. Because at high temperature the components
are strongly stressed, this leads to a decreased life time.
You achieve a better cooling not only through sufficiently
dimensioned air intake, but even more efficiently through a
larger air outtake, in order to avoid a heat accumulation.
You achieve smaller currents by using a smaller propeller
or a one cell smaller battery.
Additionally to the use of the BEC a receiver buffer battery
can be connected through a switch cable into a free plug of
the receiver or a through Y-cable.
The buffer battery avoids tension drops on hard servo
maneuvers, protecting the receiver’s functionality.
Step 5.7V 4 cell NiCd/NiMH
Step 7.4V 2 cell Li-Ion
Step 8.0V 2 cell Li-Po
Make sure that no discharged receiver battery is used,
because this would load the BEC additionally by charging
the battery. A half or fully loaded Battery will not be charged
and is only discharged in extreme conditions. The plus (red)
wire of the receiver cable does not need to be disconnected.
Several YGE ESC’s can be connected to a single receiver
without any special precautions (Parallel use of all the
BECs). The total maximum available load is the sum of the
A configuration without BEC and with galvanic separation is
also possible. For that please use our opto coupler module.
Fundamentally it is important to make sure that no objects
are within the propeller circle when batteries are connected.
The use of this speed controller is therefore allowed only in
situations where damages and personal injuries are
impossible. A damaged governor (e.g. broken, damaged by
polarity inversion or humidity) must not be reused under any
circumstances. Otherwise it can come to a later malfunctions
The ESC may only be powered from batteries, a use from
power supplies is not allowed.
1 Beeps/flashes: stick position and / or speed
for Gov.-Store not taught correctly.
2 Beeps/flashes: Under-voltage identification
3 Beeps/flashes: Temperature rise warning
5 Beeps/flashes: Receiver signals failed
6 Beeps/flashes: start up failed
The ESC signals any error that happened during flight
acoustically (motor) and optically with a blinking LED code.
Errors 2 and 3 are signaled after motor stop, but aren’t
stored as long as the ESC didn’t cut off completely (low
voltage / temperature warning). In case the error led to a
complete cut off, then it is not cleared by a tension RESET.
The deletion can take place only on purpose by connecting
the battery with the stick at full power and/or with 100%
throttle pre-selection (throttle curve), and disconnecting it
again after the interval beep. Please you leave the stick at
full power, while disconnecting, otherwise you activate the
Likewise the errors can be cleared by activating the
With an activated brake, the error is only signaled after a
tension reset or in wind milling position.
We give 6 months warranty on this speedcontroller. Any
other requirements are excluded. That applies in particular to
requirements for damage or injuries compensation due to
malfunction or failure. For damages to property or personal
injuries and their consequences, which developed from our
supply or craftsmanship, we do not take any liability, since
we have no control on handling and use