52 volts (V), 25 amps (A) current = 1300 watts (w) at 52V or 1450w at 58V (per controller).
Low voltage cut-off at 42V.
Square Wave (no hall sensor wires). Adopts MT60 yellow 3-pin motor power connector.
Each controller is 115mm x 55mm x 33mm.
Kyesang branded. Supplied as Unicool Factory spare, from factory that produces these model scooters.
Typically required as replacement when display presents controller failure error 9 (E9) or motor runs rough (like combustion engine missing a cylinder).
Order both A and B controller for both front and rear. It is worthwhile ordering A+B together as set/pair if renewing due to water ingress.
Notes:
Controllers are designed for dual motor operation. It is recommended to maintain dual drive at all times to "share the workload" across the entire system.
The low voltage cut-off defines the voltage at which the controller will "cut off" and no longer draw any power from the battery pack to prevent excessive discharge. The value is represented on the controller nameplate. For example with a 48V system, the product is factory configured to 37 volts, this is fixed and cannot be user-defined. If voltage drops to this level, the controller will turn off (shut down). This will typically occur under heavy throttle at low battery level (watch the voltage reading on the display when riding). It is one of the several methods of low voltage protection. Battery Management System (BMS) low voltage protection, which is a secondary protection, works in similar manner though self-resettable fuse in the BMS kicks in to power off the scooter, the scooter cannot be powered on until charger is connected. The BMS Low Voltage Cut-Off is typically marked on the battery pack nameplate. The third mechanism to protect from undervoltage is the P setting (throttle/display user manual), P1: "Undervoltage", this value can be user-set in 0.5v increments. The P1 setting provides a "graceful" implementation by reducing throttle (effectively mode/gear 1, or a "limp" mode) when the threshold is reached to protect excessive low voltage on the battery chemistry. For 48V (see the reference graph) systems with high endurance cells, eSN recommends this be set to 42 volts as the 37V current limit on the controller is pretty low. You can watch your voltage drop when throttling heavy on low battery. High output packs such as those on the GTR v2 controllers when paired with high demand battery packs will drop less voltage than the same controller on high endurance packs.
Naming convention A (Front) and B (Rear). This convention is also adopted on Jinpin controllers, whereas the opposite A/B convention is used by Kaabo where A denotes the Rear Master. In all instances, the display/throttle and the bulk of the other other cables connect to the Rear controller. The front controller is is the secondary or slave, Kaabo refer to the front as Deputy, Unicool simply adopt designation type A.
Other regional stockists (online) include Bike Scooter City Sumner Park (Brisbane) and eOzzie Melbourne.
Intended to operate with QS-S4 and VSETT NFC display/throttle.