The induction motor is one of the most familiar and most utilized items of industrial equipment today.  However, it is well known that the start-up of the traditional induction motor is associated with a number of problems.   

First, the high inrush current usually seen during the start-up of the motor can cause problems to the power network, while the rapid increase of torque can cause damage to the associated drive machine.  When a motor is started with full voltage, the inrush current can be as high as 5 to 9 times that of the rated current of the motor.  Furthermore, the motor is often accelerated to full speed in a fraction of a second, increasing the risk of damage to the drive mechanism.

Several types of motor starters have been designed in an attempt to minimize these problems.  Voltage reduced starters such as the Y-∆ starter are designed to reduce the inrush current and slow the rapid increase of torque during start-up.  However, while improved, these starters fall short of being ideal.  Using the Y-∆ starter, the inrush current can remain as high as 3-5 times that of the rated current, which is still too high for the power network to bear.  As a result, normal operation of related electrical equipment may be affected.  For example, a larger transformer may be required to cope with the high inrush current.  Increasing the size of a transformer is very costly and can result in larger demand charge due to the high inrush current.  Furthermore, this type of starter still increases the torque too rapidly and can cause damage to the drive mechanism.  The solution to this is to design and implement the ideal soft starter.  ECODRIVER has made use of thyristors to control the voltage to the motor, thereby further decreasing the inrush current and dramatically slowing the acceleration of the motor.

In addition to start problems, an intrinsic problem of a traditional induction motor is that it consumes more energy than is needed at partial load.  For almost 30 years, there have been many attempts to reduce the power consumption of an induction motor at partial load.  ECODRIVER is dedicated to designing a motor optimizer that optimizes the power consumption of an induction motor.  The ECODRIVER energy saving motor optimizer is able to cope with the potentially complicated load change of a motor.  Because of its unique design, ECODRIVER motor optimizers are widely used in oil pump jacks and numerous other applications.

for more information, please refer to the specification