ASI BAC Motor Controller Overview
This documentation covers the Accelerated Systems Inc. (ASI) BAC motor controllers used in Levy electric scooters. The BAC (Brushless AC) controller series provides sophisticated motor control for electric vehicle applications.
Product Line Overview
ASI offers motor controllers across two main categories:
E-Mobility Range (Compact Series)
Low power controllers for light electric vehicles:
| Model | Input Voltage | Peak Current | Continuous Power |
|---|---|---|---|
| BAC355 | 24V - 48V | 55A | 355W |
| BAC555 | 24V - 72V | 75A | 500W |
| BAC855 | 24V - 72V | 90A | 850W |
High Power Range
Controllers for demanding applications:
| Model | Peak Current | Continuous Power |
|---|---|---|
| BAC2000 | 200A | 2000W |
| BAC4000 | 430A | 4000W |
| BAC8000 | 700A | 8000W |
Common Specifications
All BAC controllers share these characteristics:
- Motor Type: 3 Phase Permanent Magnet
- Sensor Support: Sensorless, 120° Electrical Halls, Sine-Cosine Encoder
- Operating Temperature: -20°C to 50°C
Key Features
Motor Control
- Field-Oriented Control (FOC) for efficient operation
- Multiple position sensor options
- Autotune capability for motor parameters
- Field weakening for extended speed range
Braking Systems
- Regenerative Braking: Converts kinetic energy to battery charge
- Engine Braking: Off-throttle deceleration with energy recovery
- Plug Braking: Active braking at low speeds using battery power
Protection Systems
- Overvoltage/undervoltage protection
- Overcurrent protection
- Temperature-based foldbacks (controller, motor, battery)
- I²T thermal accumulation monitoring
Communication
- CANopen: Network communication with configurable PDOs
- MODBUS: Serial communication protocol
- TTL Serial: Direct communication interface
User Features
- Multiple speed/power modes (Street/Race)
- Cruise control
- Walk mode
- Reverse operation
- Assist level configuration
Mechanical Options
BAC355/555 Configurations
- Waterproof Higo: Weather-sealed connectors for outdoor use
- JST & Bullets: Standard connectors for bench testing
BAC855 Configurations
- Waterproof Higo: IP-rated enclosure
- JST & Bullets: Development configuration
Software Tools
ASI provides several configuration tools:
| Tool | Platform | Purpose |
|---|---|---|
| BACDoor3 | Windows | Full configuration and monitoring |
| BACDoor Mobile | iOS/Android | Real-time monitoring and datalogging |
| BACDisplay | Mobile | Dashboard with CSV export |
Documentation Structure
This help guide is organized into the following sections:
- Installation & Pinout - Wiring, connectors, safety
- Battery Configuration - Voltage limits, BMS integration
- Motor Setup - Motor parameters, autotune
- Braking Systems - Regen, engine braking, plug braking
- Protection Systems - Faults, warnings, foldbacks
- Communication - CANopen, MODBUS
- Software Tools - BACDoor configuration
- Technical Q&A - Common questions answered
Firmware Versions
The BAC6 firmware series includes these recent versions:
Version 6.026 (Latest)
- DSP temperature derating
- High-speed support (±256 km/h)
- Momentary assist mode switching
- Hall position compensation
- Alternate battery limits
Version 6.025
- Cruise control with configurable thresholds
- RPM foldback protection
- Dual analog throttle redundancy
- Bidirectional throttle support
Version 6.024
- Encoder noise filtering
- Sine-cosine encoder auto-discovery
- Power scaling to available output current
Version 6.023
- High battery temperature protection
- Communication loss limp mode
- Vanguard battery CAN protocol
Documentation Source
This documentation is compiled from the official ASI support portal at support.acceleratedsystems.com. For the most current information, consult the ASI technical support team.
Next Steps
- Review the Installation & Pinout guide for wiring details
- Configure Battery Settings for your system
- Set up Braking Systems for optimal performance