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LEV drives

Featuring J1939-based connectivity

Kelly (China) produces the KLS8080I/IPS motor controllers and motors for light electric vehicles (LEV). Such LEVs include e-motorcycles, e-scooters, golf carts, and go-carts, for example.

The motor controller with BLDC motors are equipped with Hall sensors respectively sine/cosine speed sensors (Source: Kelly)

The KLS controllers are mainly designed to solve noise problems of BLDC (brushless digital current) motors. Compared to the traditional trapezoidal waveform control technology, this technique based on sinusoidal wave driving technology is to reduce the operation noise and one-third switching loss. This meets the noise reduction and efficiency requirements in the application of BLDC motors. In most cases, the products achieve efficiencies of up to 99 percent. The micro-processor allows users to adjust parameters, conduct tests, and obtain diagnostic information.

The CAN interface complies with the J1939 application layer and some manufacturer-specific communication functions. Both used parameter groups are broadcasted. One message provides speed, motor current, battery voltage, and error information. The other transmits the throttle signal, controller and motor temperature as well as the controller status. The default bit-rate is 250 kbit/s.

The product comes in a ruggedized aluminum enclosure. The voltage range is 24 V to 120 V. The maximum continuous current depends on the model and ranges from 80 A to 280 A.

Configuration can be done by means of PC software or an Android app. USB and EIA-232 interfaces are available. Usually, the sine/cosine speed sensor just needs two parameters to be configured. Configuration software is updated and available on the company’s website.


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