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  • Replacing a Mechanical Adjustable Speed Drive with a Variable Speed Drive
    Retrofitting an application using a mechanical adjustable speed drive such as a Reeves Motodrive® to an AC or DC variable speed drive can be done successfully if all the details are understood beforehand. First, let's take a look at what a Motodrive really looks like conceptually. A constant speed
  • Gear Drives
    The most reliable means for changing shaft speed remains a mechanical variable-speed transmission. These drives are used to provide a variable output speed from a constant-speed power source (as in a machine tool driven by a constant-speed ac motor) or to provide torque increase
  • VF Control of 3-Phase Induction Motors Using PIC16F7X7 Microcontrollers
    and the price of semiconductors have gone down drastically. This means that the motor user can replace an energy inefficient mechanical motor drive and control system with a Variable Frequency Drive (VFD). The VFD not only controls the motor speed, but can improve the motor's dynamic and steady
  • Hydrokinetic
    variable-speed hydrokinetic couplings are equipped with heat exchangers. These drives are controlled by adjusting the amount of oil in the casing. Most scoop-tube controlled hydrokinetic drives use electrical, hydraulic, or pneumatic controllers, but a few drives are manually controlled. Because the drive
  • Rotary encoders for motors
    to full load of all ac-induction motors. Other induction-motor types don't even come close to matching the speed regulation of these motors. Yet, ac-induction motors are widely used mechanical power sources because of their inexpensive yet rugged construction. When coupled with variable
  • Two modes are better than one for heavy-duty hybrids
    , " in this context, describes the configuration of transmission gearing for optimal efficiency at varying speeds and power levels. Unlike conventional continuously variable transmissions, the 2-Mode full hybrid 's electrically controlled system uses no mechanical belts or bands. Shifts between modes are synchronous
  • Hannover Fair Focuses on Energy Efficiency
    ., will take the wraps off a smart variable-speed pump drive that matches flow to demand, cutting motor/pump speed when hydraulic systems don't operate at full load. This reportedly cuts energy consumption up to 45%, as well as reduces noise and hydraulic fluid temperature. 's EC fans are said to use
  • A Finer Control of Linear Motion
    components, and a variable frequency pulse source to determine the step rate. is torque generated by the motor at a given step rate. Dynamic torque can be represented by "pull-out " or "pull-in " torque. is the maximum torque the motor delivers when running at constant speed. Because the speed does

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