MLX90297KZC-AAF-108-RX

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MLX90297KZC-AAF-108-RX Application and Working Principle

The MLX90297KZC-AAF-108-RX is a microcontroller-based motor control system. It is an integrated motor control unit (IMCU) designed to provide reliable and flexible control to 3-phase synchronous or asynchronous motors (Brushless DC, brushless AC, and AC induction motors). This device is part of the PMIC – Motor Drivers, Controllers series and is a suitable choice for powering a wide range of industrial applications, such as compressors and pumps, e-bikes and other vehicles, as well as gate, elevator, and escalator motors.

System Overview

The MLX90297KZC-AAF-108-RX consists of a microcontroller unit (MCU), a power supply, an external power MOSFET, an on-board diagnostics circuit, and an auxiliary field oriented control (FOC) unit. The MCU unit is a 32-bit ARM processor. Its various features include: integrated Ethernet, CAN, and USB Host; command streamer; and real-time clock, among others.

The power supply consists of an isolated DC-DC buck converter, which provides a regulated supply voltage to the device. The on-board MOSFET allows the user to enable and disable power to the device. The embedded diagnostics circuit captures diagnostics information and can detect potential faults.

The MLX90297KZC-AAF-108-RX is designed to drive both three-phase ac and dc motors. The external power MOSFET is used to isolate the supply from the motor when the device is disabled. The FOC unit is used to ensure smooth control of the motor. It also provides additional features such as low-frequency noise compensation, sensorless motor operation, and current sensing.

Main features

• Compatible with a wide range of synchronous or asynchronous motors, including Brushless DC, Brushless AC and AC induction motors
• High efficiency and low RMS current ripple with embedded FOC unit
• Integrated Ethernet, CAN, USB Host, and SBS/PAS compatibility
• Simplified current sensing and sensorless motor operation
• On-board diagnostics circuit captures diagnostics information
• Integrated low-frequency noise compensation feature

Working Principle

The MLX90297KZC-AAF-108-RX works by calculating the open-loop commutation angles of the motor phases. The device then generates a series of pulse width modulated (PWM) signals, which control the external power MOSFETs, to provide a controlled voltage to the motor. The MCU works in synchronization with the FOC unit to ensure smooth motor control. Additionally, the FOC unit is also used to detect motor speed, and to calculate motor current and phase angle.

The device also features integrated safety features to ensure reliable operation. These features include short-circuit protection, over-voltage protection, and thermal protection. Additionally, the device also features an on-board diagnostics circuit, which captures and records diagnostics information.

Conclusion

The MLX90297KZC-AAF-108-RX is a microcontroller-based motor control system. It is part of the PMIC – Motor Drivers, Controllers series, and is designed to provide reliable and flexible control to 3-phase synchronous or asynchronous motors. This device is ideal for a wide range of industrial applications, such as compressors and pumps, e-bikes and other vehicles, as well as gate, elevator, and escalator motors. The MLX90297KZC-AAF-108-RX works by calculating the open-loop commutation angles of the motor phases, and generating a series of pulse width modulated signals, which control the external power MOSFETs, to provide a controlled voltage to the motor. Additionally, it features integrated safety features, and an on-board diagnostics circuit, which captures and records diagnostics information.

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