Votol Controller EM350SP

VOTOL Controller EM350sp 72V CAN BUS Controller: High-Power, Programmable Solution for Mid Drive & Hub Motors

Designed for performance-driven electric vehicles (EVs), the VOTOL EM350sp 72V CAN BUS Controller stands out as a robust, efficient, and versatile control unit—engineered to unlock the full potential of mid drive motors and hub motors. 

This sine wave brushless DC controller integrates advanced flux-weakening technology, high current handling, and user-friendly programmability, making it a top choice for EV enthusiasts, custom builders, and manufacturers seeking reliable power management. 

Whether paired with QS Motors (its recommended match) or other compatible motor brands, the EM350sp delivers consistent performance, low temperature operation, and seamless integration—elevating the driving experience for electric motorcycles, heavy-duty e-bikes, and more.

What’s Included in the Kit: Everything for Seamless Setup
Each EM350sp controller package comes with all components needed for quick, hassle-free installation—no extra parts required:
1× VOTOL EM350sp Sine Wave Controller with CAN BUS
1× USB Programmable Cable (for custom parameter tuning via PC)
1× Plug-in Set (matches controller harness plug, no wiring modifications needed)
1× User Manual & Software Download Link (guides for setup, debugging, and programming)

Key Features: Why the EM350sp Stands Above Standard Controllers
1. High-Power Handling for Demanding Motors
With 600A peak DC current and 1300A peak phase current, the EM350sp easily supports high-torque motors—including 9kW hub motors (as validated in test reports). It maintains stable power delivery even under heavy loads (e.g., climbing steep hills or hauling cargo), avoiding voltage drops or overheating that plague lower-capacity controllers.

2. Advanced Flux Weakening for Speed & Torque Balance
The 150% flux weakening function is a game-changer for high-speed EVs: it adjusts magnetic flux in the motor to boost top speed without sacrificing low-end torque. This means your EV can accelerate quickly from a stop and maintain high speeds on flat roads—ideal for electric motorcycles or performance e-bikes.

3. Low Temperature Rise & Durable Build
Thanks to its aluminum substrate design, the EM350sp dissipates heat efficiently, keeping operating temperatures low even during extended high-power use. Imported materials and a sealed IP65-rated casing further enhance durability, protecting internal components from dust, moisture, and vibration—extending the controller’s lifespan.

4. PC Programmable: Customize Performance to Your Needs
Using the included USB cable and software, you can fine-tune the EM350sp’s parameters to match your motor and riding style: adjust speed limits, torque curves, flux weakening levels, and regenerative braking settings. The intuitive PC software interface makes debugging and optimization accessible even for DIY builders, ensuring the controller works in perfect harmony with your motor.

5. Recommended Match with QS Motors (with Compatibility Flexibility)
While the EM350sp is recommended for use with QS Motors (for seamless performance out of the box), it can be paired with other motor brands—provided you test and adjust parameters (e.g., motor speed, polar number, size for hub motors; power for mid drive motors) beforehand. This flexibility makes it a versatile choice for custom EV builds.

Test-Proven Performance: EM350sp + 9kW Hub Motor
In testing with a 268 9kW Hub Motor, the EM350sp delivered impressive results that validate its power and efficiency:
Max Output Power: 18396W (at 72.12V, 293.8A)
Max Torque: 271.5Nm (ensures strong hill-climbing and load-carrying capability)
Highest Efficiency: 87.1% (minimizes battery drain, extends ride time)

For anyone building or upgrading a high-power EV—whether an electric motorcycle, heavy-duty e-bike, or utility vehicle—the VOTOL controller EM350sp 72V CAN BUS is a reliable, high-performance choice. 

Its combination of high current capacity, flux weakening, IP65 protection, and programmability ensures it can handle the demands of even the most rigorous EV setups. Paired with QS Motors (or properly tuned for other brands), the EM350sp turns your motor’s potential into real-world performance—making it an essential component for any serious EV project.