Endeavour Automation

  A braking unit or sometimes called a braking chopper is an electrical switch (normally IGBT) that manages the DC bus voltage by switching the braking energy to a resistor where the braking energy is converted to heat.  By activating the braking function, it can manage the DC bus voltage level and avoid overvoltage nuisance tripping by switching the braking energy to a resistor where the braking energy is dissipated in the form of heat. This means that the braking unit or chopper is the controlled path - like a switch - (IGBT) that allows regenerative motor energy to flow and the braking resistor is the element where this regenerative motor energy will be dissipated in.        

  How Variable Speed Drives Save Energy? Most motors are designed to rotate at a set speed based on the number of magnetic poles built into them and the supply voltage and frequency applied. They cannot alter their speed. Even for fixed speed systems, it can be difficult to find a motor that rotates at the correct speed for its designated application. Therefore, extra parts such as gears, dampers or variable speed drives are often required. Variable speed drives provide effective speed control of AC motors by manipulating voltage and frequency.  Controlling the speed of a motor provides users with improved process control, reduced wear on machines, increased power factor and large energy savings. Most applications can be grouped into the following torque categories: Constant torque load applications such as conveyors often require a starting torque close to the rated torque of the motor, and show only small changes as they approach rated speed Linear torque load applications s...

  A variable frequency drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage of its power supply. The VFD also has the capacity to control ramp-up and ramp-down of the motor during start or stop, respectively. Even though the drive controls the frequency and voltage of power supplied to the motor, we often refer to this as speed control, since the result is an adjustment of motor speed. There are many reasons why we may want to adjust this motor speed.  For example, to Save energy and improve system efficiency Convert power in hybridization applications Match the speed of the drive to the process requirements Match the torque or power of a drive to the process requirements Improve the working environment Lower noise levels, for example from fans and pumps Reduce mechanical stress on machines to extend their lifetime Shave peak consumption to avoid peak-demand prices and reduce the motor size required In addition, today’s d...