Motor Drive & Control Solutions
TI is a global market leader that leverages its rich history in advanced motor drive and control, with broad analog and microcontroller portfolios, to deliver complete motor system solutions.
    • Jan 28, 2016

    Protect your BLDC motor drive with cycle-by-cycle current limit control – part 2

    Welcome back! If you missed part 1 of this series, I discussed the necessity of cycle-by-cycle over current protection in BLDC motor drives and how to sense the motor winding current. In part 2, I will discuss on how to implement the cycle-...
    • Jan 21, 2016

    Protect your BLDC motor drive with cycle-by-cycle current limit control – part 1

    Brushless DC (BLDC) motors are popular because of their high efficiency, high torque-to-weight ratio, low maintenance and long life. A three-phase brushless DC motor consists of a three-phase wound stator and rotor with permanent magnets. The absence of brushes in a BLDC motor necessitates an electronic drive for proper commutation of current in motor winding. The most common power-electronic drive for a BLDC motor...
    • Jan 11, 2016

    A novel approach to full-wave bridge-rectifier design

    Most electronics require an input supply from an AC power line. For voltage regulators, switch-mode power supplies and other downstream electronic components, a full- or half-bridge diode-rectifier device rectifies the sinusoidal AC voltage waveform and converts it to a DC voltage. Using four diodes in a bridge-rectifier configuration is the simplest and most conventional way to rectify an AC voltage. Implementing...
    • Dec 21, 2015

    Motor Drive forum top FAQs: 3 methods to prevent electrical overstress

    There’s a saying that great engineers don’t just discover problems, they solve problems. In my last post for this series on top FAQs, I explained exactly what electrical overstress (EOS) is, how it affects integrated circuit (IC) components, and several common sources of EOS in motor-drive systems (based on the saying above, that’s the “problem”). One of my colleagues also covered supply...
    • Nov 30, 2015

    Jump-start your Hall effect sensor expertise: Free December 3 webinar

    The video of this webinar is now online at: http://bcove.me/iwht7xpg ___________________________________________________ Hall effect magnetic sensors are an integral part of modern electronics, bridging physical movement to digital information....
    • Nov 24, 2015

    7 steps to choose the right isolators for AC motor-drive applications

    AC motor-drive systems, also known as adjustable-speed power drives or variable-frequency drives, are smart motor-control systems. These systems use sophisticated power electronics that control the speed, torque and position of a motor, rather than r...
    • Nov 20, 2015

    Designing an EMC-compliant interface to motor position encoders – Part 6

    So far in this series , we have discussed various digital-interface options for motor position encoders including EnDat 2.2 , bidirectional/serial/synchronous ( BiSS ) and HIPERFACE DSL . These are the main standards using RS-485- or RS-422-based serial d...
    • Nov 10, 2015

    Designing an EMC-compliant interface to motor position encoders – Part 5

    The first part of this blog series provided an overview of the various types of motor-position encoders and their interfaces. Parts 2, 3 and 4 explained how to design an interface to absolute encoders with serial interfaces such as EnDat 2.2 , bidirec...
    • Oct 26, 2015

    Evolution of the brushed DC gate driver

    Looking back at 20 years of electronics, we’ve come a long way. The components being released in 2015 have unparalleled refinement and integration. Processors are faster, LEDs are brighter, memory is denser, everything is lower power and integr...
    • Oct 15, 2015

    Simple BLDC motor spinning 101, part 2: Sensored v. sensorless motor control

    It has been a while since I posted part 1 of this simple brushless DC (BLDC) motor spinning 101 blog series, in which I talked about the five key priorities when designing a BLDC motor-control system: efficiency, noise, flexibility, dependability and cost. Now it’s time to take a look at common three-phase BLDC motor-control approaches from a few different angles. Let’s start with sensored vs. sensorless motor...
    • Sep 28, 2015

    Design an EMC-compliant interface to motor position encoders – Part 4

    Recently, my colleagues have discussed various digital interface options for motor position encoders, including the EnDat and BiSS interfaces. The High-Performance Interface Digital Servo Link (HIPERFACE DSL) digital protocol completes the panor...
    • Sep 22, 2015

    Motor drive forum top FAQs: Electrical overstress

    “Magic smoke” is an informal term for the caustic smoke produced by overheated electronic circuits and components. These words have been spoken by almost every electrical engineer, often when they forgot to adjust the power-supply voltage...
    • Sep 14, 2015

    Designing an EMC-compliant interface to motor position encoders – Part 3

    In the first part of this blog series, I provided an o verview of the various types of motor position encoders and their interfaces. In the second installment, we explained how to design an interface to a bidirectional serial synchronous (BiSS) positi...
    • Sep 11, 2015

    Tools to simplify brushless motor development

    Traditionally seen as the high end of DC motor types, brushless DC motors (BLDCs) have typically been reserved for systems with high performance or efficiency requirements. But as motor-drive systems become more integrated and control solutions become more readily available, system designers are finding it simpler than ever to move forward with BLDC motor solutions in order to reap the performance and efficiency benefits...
    • Sep 7, 2015

    Designing an EMC-compliant interface to motor position encoders – Part 2

    In the first part of this blog series, Martin Staebler provided an overview of the various types of motor position encoders and their interfaces. In part 2, I’ll explain the interface to a bidirectional/ serial/ synchronous (BiSS) position enco...
    • Aug 31, 2015

    Designing an EMC-compliant interface to motor position encoders – Part 1

    Motor position encoders are widely used in industrial motor control applications such as servo drives, robotics, machine tools, printing machines, textile machines and elevators. Interfacing these encoders to the rest of your system can raise some tr...
    • Jul 23, 2015

    Motor Drive Forum Top FAQs: Understanding current ratings

    If you have ever looked for a Texas Instruments device, you have likely seen the tool shown in Figure 1. This product selection tool is a mighty instrument that can help you swiftly review hundreds upon hundreds of devices. Figure 1: Product selection tool But as the saying goes, garbage in gets you garbage out. So understanding the various specifications of the devices you’re searching is critical to...
    • Jul 20, 2015

    Teaching Your PI Controller to Behave (Part II)

    Dave Wilson, Motion Products Evangelist, Texas Instruments In my previous blog on this topic, we briefly reviewed the history of the PI controller and presented two forms that are commonly used today. Regardless of which form you use, the frequ...
    • Jul 20, 2015

    Teaching Your PI Controller to Behave (Part I)

    Dave Wilson, Motion Products Evangelist, Texas Instruments Richard Poley manages the training activities for our C2000 microcontrollers (MCUs), and co-teaches the TI Industrial Control Seminar series with me. (If you have never attended one ...
    • Jul 13, 2015

    Motor Drive forum Top FAQs Part 2: How to estimate motor regeneration and VM pumping

    Motor regeneration is a common problem that occurs in motor-drive systems. Many designers have to select a motor supply voltage (VM) rating of twice the nominal level, which adds to the system cost. Fortunately, if you can first understand the pumping details, you can understand the necessary VM margin. In the first post in this series on frequently asked questions, Nicholas Oborny provided advice on how to read a motor...
    • Jun 30, 2015

    Simplifying gate driver design for brushed DC motors

    Are you looking to drive a simple brushed DC motor? Do you need to use discrete MOSFETs to drive a bunch of current through a giant brushed motor with little time for development? When you grab an off-the-shelf gate driver, you always see a diagram like Figure 1: just choose two resistors and you’re (theoretically) good to go. Figure 1: A hypothetical gate-driver schematic There’s just one...
    • Jun 26, 2015

    Motor start-up techniques: Part three

    I have discussed sensorless motor start-up with our InstaSPIN-FOC™ technology in part one of this series, followed by a discussion of how to generate sufficient torque at start up and maximize it while spinning your motor in part 2. In this thi...
    • Jun 19, 2015

    Motor drive validation: Keeping our parts in your hands

    Have you ever seen this video with a cat wearing a miniature shark costume and riding a robotic vacuum cleaner? For the cat lovers out there this video is every bit as awesome as it sounds. If you happen to be a dog lover, not to fear! If you check out the related videos sidebar you can see videos of dogs doing the same thing. As a validation engineer, I can appreciate a video like this not only because pets are awesome...
    • Jun 9, 2015

    Under the hood of a 3-D printer – Part 1

    In a previous post, I introduced a TI Design reference design for a 3-D printer controller board shown in Figure 1 and gave a brief rundown of some of the key TI devices enabling 3-D printers. Today, I’ll provide more background about 3-D printing in general. This might be old hat to those who are well-versed in 3-D printers, but may turn on a few light bulbs for those new to working with this device. Figure...
    • Jun 3, 2015

    How a dual operational amplifier works in motor-drive applications

    This post is co-authored by Andrew Leverette. In my last blog post, I introduced an integrated solution for a high-current amplifier application. I talked about the advantages of TI’s ALM2402 dual-operational amplifier over a discrete solution and how it is useful to save your board space while packing critical features like over current protection and thermal shutdown protection. In this post, we’ll talk...