Also, the clearance available for the wheels can limit wheel diameter, which in turn affects the wheel-drive motor speed and torque required. Turning radius: The required turning radius of the vehicle has a direct impact on vehicle design and the characteristics of the traction actuators. A vehicle with a narrow, slick tire running on a smooth surface will need to generate considerably less torque to achieve a desired performance than one with a wide tire running on loose gravel, for example. Wheels and operating surface: In addition to determining the number and location of drive wheels and casters, OEMs need to analyze the characteristics of the wheel’s tire, the operating surface, and the interface between them. This distribution may change, depending on whether the vehicle is loaded or unloaded. Choosing the right traction solution requires understanding how the weight of the vehicle and load will be shared among the drive wheels and casters. These vehicles are typically supported on some combination of active wheels (drive wheels) and passive wheels (casters). Load: The load for an industrial vehicle includes both the weight of the unit load and the weight of the vehicle itself. For the types of specialty vehicle applications described above there are some special nuances. Understanding the ApplicationĬhoosing the best traction or steering solution for a logistics vehicle or mobile robot starts with a detailed review of the requirements. In this article, we will review the special requirements of traction applications and discuss the categories of electric traction solutions with a focus on the pros and cons of each. Options include brush DC motors, brushless DC motors, stepper motors, and AC synchronous or asynchronous (induction) motors. Electric traction solutions deliver on all counts.Īs in most aspects of engineering, there is no single ideal solution. To meet demand, OEMs will need traction technologies that perform unquestionably while remaining rugged, economical, and easy to install and maintain. By 2022, analysts expect the global AGV market sector alone to hit $2.65 billion. As organizations seek to streamline operations and do more with less, they increasingly focus on automated guided vehicles (AGVs) and similar vehicles to help get the job done. Smarter, better, faster, less expensive - those words are the mantra of today’s global economy.
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