FREQUENCY CONTROL
PANELS
INSTALLATION, MAINTENANCE and OPERATION GUIDE
17
It is the process for the rotor speed of the motor to
reach its rated speed from zero. The stator of the motor
at stand stillWhen voltage is applied to its windings,
the induced back emf is zero. Because the rotor is
stationary. The current drawn at the first moment
is shortis the circuit current and this current is very
high. The force created by this current in the rotor
windings and the starting momentproduced and the
rotor starts to rotate with the effect of this moment.
The short-circuit current drawn over time causes the
motor to rotate.gets smaller as it starts. The opposite
of the machine or system connected to the shaft of
the engine and driven by the engine. When the torque
is equal to the torque produced by the motor, the
motor and the motor drive this system at constant
speed.continues to rotate. This operation is called
starting operation. Starting methods create a starting
torque, which is applied to the motor in order to bring
the motor to its speed at rated load. used to provide
sufficient current. Advantages and disadvantages of
each methodare available. Among them, frequency
converters provide the greatest energy savings.
The speed of a motor is directly proportional to the
frequency of the AC mains. Possible to adjust the
frequency of the network If it were possible, it would be
possible to control the speed of the engine. Frequency
converter to control the speed of the motorIt is a
method used for giving way. Frequency converters
include the input of fixed frequency AC power, variable
frequencylt is electronic devices that converts the
alternating current to an output by controlling the
frequency of the electrical power supplied to the
motor. They are used to control the rotating speed,
thus the speed of the engine.
In order for a three-phase asynchronous motor to
rotate at various speeds or at the same speed in
different conditions, a frequency inverter is needed to
be used. There are some advantages of using frequency
inverters to control the speed of asynchronous motors.
Big, strong motors consume high energy. Therefore, to
prevent this high energy consumption and to make
the motors rotate at desired speed in every condition,
panels with frequency inverters that generate various
frequencies and make the motor work at a stable
speed are produced. These panels work by adjusting
the speed at optimum conditions as the load requires.
Even the tiniest change in the speed can decrease
energy consumption at significant levels. The pump
runs at maximum speed at every condition when a
motor driver is not used. How ever, when a panel with
frequency control is used, energy can be saved by
decreasing the speed of the pump motor in the case
of water and need is decreased.
8. FREQUENCY CONTROLLED PANEL WORKING PRINCIPLE
