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MDDHT3420 application field and working principle

MDDHT3420 is a motor driver board used in motor drive systems. It is mainly designed for closed loop control for actual speed or position control, as well as for open loop speed control. The board has one half-bridge drive driver channel and two high side drive driver channels. It is important to note that it is not a three-phase drive. Rather, it is three independent single-phase drives that use the same power source voltage.

The MDDHT3420 board has intrinsic intelligence, such as 3 phase frequency modulation, sinusoidal commutation, speed/position control, parameters shown on LCD, etc. This board is most often used in applications such as robotics, automatic machines, CNC machines, etc.

In terms of applications, the MDDHT3420 driver is used in high-end industrial production as well as for medical applications, due to its superior performance and reliability. It can handle a wide range of motor types, and each motor type can be adjusted in terms of speed, direction, braking and acceleration. The MDDHT3420 provides an adjustable current limit setting, which is especially helpful when operating a motor at light loads or in a low speed range.

Working Principle

The MDDHT3420 driver board takes a pulse-width modulation (PWM) signal from the controller to control the motor’s speed and direction. The PWM signal is received through the motor connections and is then converted into a differential voltage signal. This signal is then sent to the corresponding power control elements, such as MOSFETs or IGBTs, to control the motor.

The MDDHT3420 board contains three independent current-limiting options — current, peak current, and current cutoff — to ensure the motor is safely operated. Additionally, the board works with various thermistor types to protect the motor from overheating. A built-in watchdog timer can be set up to time-out and shut down the board in the event of an over current or over voltage situation.

Conclusion

The MDDHT3420 driver board is a reliable, powerful, and easy-to-use motor driver board with numerous advanced features. It is especially suitable for high current applications and offers many advantages over traditional motor driver boards. In addition to its various protection features, its superior performance and reliability make it an ideal choice for both industrial and medical applications.

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