ASI BAC855 · Motor Controller

ASI BAC855 Motor Controller

Name: ASI BAC855
Brand: ASI (Accelerated Systems Inc)
SKU: BAC855
Price: 180 EUR
Availability: InStock

A high-performance, sub-compact AC motor controller (inverter) built for the highest commercial tier of electric bikes. The BAC855 pairs Field-Oriented Vector Control with ASI's proprietary adaptive sensorless algorithm — delivering up to 120% of a motor's rated maximum locked-rotor torque, without position sensors.

€ 180 In stock

Buy — €180 Full specs

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The technology

Sensorless vector control, done right.

The ASI BAC855 controller runs Field-Oriented (vector) Control on top of ASI's proprietary adaptive motor-control algorithm. It tunes itself to the motor and drives smooth, high torque from a standstill — no hall sensors, no encoder, no guesswork.

Field-Oriented Vector Control

True FOC keeps current and rotor field aligned for efficient, quiet, high-torque operation across the whole speed range.

Adaptive sensorless algorithm

ASI's proprietary sensorless motor-control algorithm reads the motor itself, so the BAC855 runs cleanly without position sensors.

Auto-tuning

The controller auto-tunes to your motor, matching its characteristics automatically instead of forcing you to hand-map every parameter.

120% locked-rotor torque

Delivers up to 120% of a motor's rated maximum locked-rotor torque — strong, controllable starts even under load.

Specifications

ASI BAC 855 at a glance.

The sub-compact BAC855 controller packs commercial-grade power handling into a small footprint. Key ratings below.

Power

800 W

Nominal Voltage

36–72 V

Nominal Current

70 A

Peak Current

90 A

CAN BUS

Yes

Auto Tuning

Yes

Sensorless Start

Adaptive

Where it fits

Built for high-end e-bikes.

The BAC855 controller kit is engineered for the highest commercial tier of electric bikes, where smooth sensorless torque, CAN BUS integration and a compact inverter matter most. If you are building or servicing a high-power e-bike drivetrain, the ASI BAC855 is a proven, integration-ready choice.

Buy — €180 Explore the Lightest kit

Good to know

Honest, before you buy.

What ships is the controller itself. A few things it does not include, so there are no surprises:

No BACdoor app credentials provided
No programming cable included
No Bluetooth
Pictures are for reference only.

Get the ASI BAC855.

800 W sub-compact FOC inverter with adaptive sensorless control, auto-tuning and CAN BUS. In stock now at €180.

Buy — €180 Discover the Lightest kit →

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