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(Solved) What Is A Dc Motor Driver?

Our articles on shunt DC motors, series wound DC motors, and brushless DC motors provide detailed explanations on how DC machines function 🤓 To briefly summarize, the speed/torque curve of DC motors are inversely linear, meaning their torque proportionally decreases as the motor RPMs increase 😎 It is easy to adjust the speed and torque by lowering it 🙈 DC motors can be reversed, as opposed to AC motors. Simply switch their leads so the DC current flows in the opposite direction. The unique characteristics of DC motor controllers are used in unique ways. This article will examine the most well-known methods. [1]
These motor drivers can be used in conjunction with brushed DC motors, such as the metal or plastic gearmotors. Many motor driver boards are available, offering a broad range of functions and operating voltages. These basic modules can serve as carrier boards to a range of discrete MOSFET based H bridges and motor driverICs. The modules provide low-level interfaces, such as PWM or digital high/low outputs. These low-level signals are usually generated by an external microcontroller. Some of our motor driver are available as an Arduino shield. Others can be combined with controllers to create general-purpose motor drives. For easy integration with compatible Raspberry Pi boards, several are available in the shape factor of an expansion board. Below are the tables that compare key specifications and features of motor drivers. Anda Putnam (Hanzhong, China) brought this information to our attention. [2]
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This article was based on a brand new article by core-electronics.com.auMotor drivers use a bigger chip or more discrete FETS to manage higher amounts of current than the 5V/3.3V pin on a microcontroller. These FETS allow for the control of a larger load from a smaller signal. It’s important to note that when referring to motor drivers and controllers, the type of motor also has to be taken into account. A brushed DC motor is the simplest to control as there’s no timing or protocol required, whereas stepper and servo motors both require a specific type of signal to operate them correctly. For simplicity’s sake, we’ll use examples that are designed for simple, brushed motors, however, the principle applies to all types. Last modified by Delance Hernandez, Varanasi (India) on 47/07/2018 [3]
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The pros at powerelectronicsnews.com, maurizio Di Paolo Emilio has a Ph.D. A Telecommunications Engineer and Physics graduate, he has also worked in the field of gravitational waves. His international experience includes several projects related to gravitational waves. Research designing Thermal compensation, xray microbeams and space technology for motor control and communications. As a technical journalist, he’s been working in collaboration with English and Italian blogs as well as magazines. He specializes in electronics and technology. He was editor-in chief of Firmware from 2015-2018. Maurizio is passionate about writing stories on Power Electronics, Wide Bandgap Semiconductors and Automotive. Maurizio is the editor-in chief of Power Electronics News & EEWeb as well as European Correspondent for EE Times. PowerUP, an audio podcast about power electronics is hosted by Maurizio. His contributions include a variety of technical and scientific articles, along with a few Springer books that cover energy harvesting, data acquisition, and control systems. [4]
Further to the above, if changing the motor’s direction of rotation is required, it can be achieved using an ‘H-bridge’ circuit, so called because it uses four transistors to control the flow of current (see Figure 3). When the two transistors Q1 and Q4 are switched on, current flows through the motor (labelled ‘BDC’ in Figure 3) from left to right, making it rotate. Turning off Q1 and Q4 and switching Q2 andQ3 on causes current flow to go from right-to-left through the motor. The motor will then rotate the other way around. In the same single transistor circuit that was discussed previously, figure 3 illustrates how we need to have a flyback for every transistor. This functionality is provided by the transistor’s body diode. (We are truly grateful to Niyoka.Y. We are grateful for their insight. [5]

Refer to the Article

  1. https://www.thomasnet.com/articles/instruments-controls/dc-motor-controllers/
  2. https://www.pololu.com/category/11/brushed-dc-motor-drivers
  3. https://core-electronics.com.au/tutorials/motor-drivers-vs-motor-controllers.html
  4. https://www.powerelectronicsnews.com/efficient-dc-motor-drivers/
  5. https://www.diodes.com/design/support/technical-articles/driving-brushed-dc-motors/
Kelly-Anne Kidston

Written by Kelly-Anne Kidston

I am a writer of many words, from fiction to poetry to reviews. I am an avid reader and a lover of good books. I am currently writing my first novel and would love to find some beta readers who are interested in getting an early look.

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