SL controller series

Up to 84V (20S Lithium battery), up to 24,5 kW nominal power, up to 36,6 kW peak power.

The SL is automotive grade controller from ESC3 family, it can deliver maximum power whilst keeping weight as low as possible. It can be used in wide range of applications, especially in industrial and automotive. Using the most modern technologies it achieves extreme dynamics, maximum efficiency, sensorless control or regenerative braking, all kinds of protection or galvanic isolation, all this with minimum dimensions. The SL controller is capable of driving all common types of electric motors.


  • Automotive or Industrial motor control
  • Hi-end sport motorbikes, e-bikes
  • Combustion engine starter-generator
  • Military inertial stabilization
  • Professional drones, RC models
  • Research & development
  • Servo drive

Product Information


  • Motors: PMSM (BLDC, BLAC), Induction, Stepper
  • Vector drive with DTC and FOC
  • Block commutation Drive with DTC and hybrid sensorless control
  • Zero-RPM sensorless control
  • MOS-FET power stage with all kinds of protection incl. phase short circuit
  • Designed for highest dynamic response
  • Charge step-up conversion and SOC estimator with current and voltage logging
  • Capacitors pre-charge option


  • State-of-the-art sensorless control (including zero-RPM)
  • Speed / Torque / Voltage control
  • Proportional regenerative braking
  • Flux weakening operation together with MTPA control for PMSM
  • Advanced auto-diagnostics and fail-safe modes
  • Motor parameters automatic identification
  • Service logging (max. amps and rpm, total motor-hours, mileage ….)
  • Deep customization with custom firmware branches

Motor sensors

  • Motor temperature input
  • Option “a” – UVW Hall sensors; Sin-Cos
  • Option “r” – SSI / BiSS;  A/ B encoder; resolver

Control I/O

  • 5x analog or digital GPIO (range from 0 v to BATT+)
  • Up to 5 galvanically isolated analog or digital inputs
  • On / Off input switch, safety switch, capacitor pre-charge
  • 3x contactor output with PWM and current control
  • Charge input up to 25 A with current measurement


  • Power: M6 terminals
  • Signal & communication: AMPSEAL 35-pin connector


  • Multiple addressed interfaces for service, debugging, application and firmware management
  • USB, RS-232 (galvanically isolated), CAN-bus (galvanically isolated), external WIFI dongle

Software tools

  • Service tools: CLI for fast and effective set-up, GUI for easy set-up, Graphing and visualization tool
  • Firmware update and remote management tool
  • Custom software for PC or mobile devices can be designed on request

Mechanical characteristics

  • Box with aluminium bottom pad: 148 x 96 x 64 mm, 1100 g

Electrical parameters

Battery nominal voltage43 V DC 58 V DC72 V DC
Battery configuration12 S16 S20 S
Min. operating voltage24 V DC24 V DC24 V DC
Max. operating voltage51 V DC68 V DC84 V DC
Nominal power (60min, BLDC)17 700 W21 300 W24 500 W
Nominal current (60min, BLDC)410 A370 A340 A
Power dissipation300 W 1300 W 1300 W 1
Peak power (10sec)25 900 W28 800 W36 000 W
Peak current (10sec)600 A500 A500 A
¹ Controller bottom pad thermally connected to infinite heatsink which does not exceed 60°C
* Variants 0660 and 0860 are available only on request

3D model

Rotate object continuously on button click. Zoom in and out using the mouse wheel.

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