Motor Controller is the “brain” of electric vehicles, and the SIA-CJ72450 Motor Controller stands out as a high-performance solution tailored for mid-drive motors and high-power EV applications.
Engineered with robust current handling, versatile functionality, and durable design, this 72V controller delivers seamless power management—ideal for e-motorcycles, custom EVs, and commercial electric vehicles.
Core Specifications: Power & Build
1. Voltage Compatibility: Rated 72V, with an operating range of 36V–100V for flexible integration with diverse battery systems.
2. Current & Power Capacity: 80A rated current, 200A BOOST current, and 450A peak current—supporting a maximum peak power of 14400W.
3. Physical Traits: Net weight 2035g, equipped with 25CM and 15CM harnesses for easy installation; IP65 waterproof and dustproof rating for all-weather reliability.
4. Default Adaptation: Optimized for mid-drive motor 138-70H, with 5 pole pairs and 120° Hall sensor compatibility.
Key Features: Versatility & Control
The SIA-CJ72450 motor controller is packed with user-centric and safety-focused features:
1. Multi-Gear & Speed Control
3 adjustable gears: 1st gear (50% speed/current), 2nd gear (70% speed/current), 3rd gear (100% speed/current) for tailored performance.
Maximum speed limitation of 6000rpm, with reverse gear (10% speed limit) for added convenience.
Cruise control (Sport mode) support for comfortable long-distance rides.
2. Comprehensive Safety Protections
Battery safeguards: Undervoltage protection (60V hard cutoff, 64V soft cutoff) and overvoltage protection (91V) to extend battery life.
Thermal control and motor temperature monitoring prevent overheating during high-power operation.
Dual brake support (high brake: 9–13.8V high-level effective; low brake) and side stand safety interlock.
Anti-theft function with dedicated signal port (requires special harness) for enhanced security.
3. Intuitive Functionality & Debugging
Hall signal compatibility (Hall A/B/C) ensures precise motor control and smooth acceleration.
P gear (parking gear) and one-line control for simplified operation.
Bluetooth support for easy parameter tuning and system diagnostics (RX/TX debug ports included).
Instrument compatibility for real-time data display (speed, voltage, gear, etc.).
Test-Proven Performance
Under rigorous 72V testing, the SIA-CJ72450 delivers consistent and efficient performance:
· Maximum output power of 9914.5W at 4818.6rpm, paired with 19.65N.m torque.
· Peak overall efficiency of 94.3%, minimizing energy loss and maximizing EV range.
· Stable operation across load points, with reliable current and speed regulation for demanding scenarios.
Ideal Applications
· High-performance e-motorcycles and mid-drive motor-equipped EVs (default for D138A-70H).
· Custom EV builds requiring precise power management and multi-gear control.
· Commercial fleets (delivery vehicles, rental EVs) needing durable, safety-focused controllers.
· Enthusiasts upgrading their EV’s powertrain for enhanced torque, speed, and reliability.
Why Choose the SIA-CJ72450 Motor Controller?
It combines raw power (14400W peak) with intelligent control, offering versatility for both personal and commercial use. The IP65 rating, comprehensive safety protections, and easy debugging make it a reliable choice for harsh environments and custom setups.
