3.2.2 dynamic adjusting energy saving
With the development of electronic technology, frequency converter technology maturity, frequency converter quickly adapt to rotary joints the
load change, supply maximum efficiency voltage. Frequency conversion governor in the software has 5000 times/SEC measurement and
control output function, always keep the motor output high efficiency operation.
3.2.3 through frequency conversion own V/F function power saving:
In the guarantee motor output torque, can be automatically adjusted V/F curve. To
rotary union reduce the motor output torque, to reduce the
input current, achieve energy saving state.
We are improving power factor energy saving:
The motor stator winding and rotor winding through the electromagnetic effect and produce moment. Winding due to its inductive
reactance effect. Power to the character, impedance characteristics is perceptual and motor at run time absorb a large number of
reactive power, cause power factor is very low. The variable frequency energy saving governor, because of its performance has
become: AC, DC, AC, in rectifying filtering, load characteristic changes. Frequency conversion governor to the impedance
characteristics of the power grid is resistance sex, high power factor, reduce reactive power loss.
Four, soft start energy-saving features:
In the motor when started at full pressure, because motor start-up moment needs, from the power grid absorption 7 times of the
motor rated current, and large starting current is waste of electric power, the grid voltage fluctuation damage is very big
also, increased the line loss and variable loss. The soft start, start current can be from 0 - motor rated current, reduce the
start current for the impact of the power grid, save electricity, also reduced the start inertia of equipment large inertia
speed impact, extend the life of the equipment. Soft start controller can according to the motor power factor of high and low,
automatic judgment motor load rate. When the motor in the light or load rate is very low, but through the phase control
thyristor of conduction Angle change, so as to change the input motor power, in order to fiber optic rotary joint achieve the purpose of saving energy.
Soft starter use three instead parallel thyristor as voltage regulator, its access power and between motor stator. This circuit
such as three-phase full control bridge rectifier circuit. Use the soft starter start motor, thyristor output voltage increase
gradually, motor accelerate gradually, until the thyristor full conduction, motor work in the rated voltage of the mechanical
properties, realize smooth start, reduce the starting current, avoid start overcurrent trip. For motor achieve rated revolution,
start process is over, soft starter automatic bypass contactor replace has completed the task of thyristor, for motor normal
operation to provide voltage rating, in order to reduce the thyristor heat loss and prolong the service life of the soft
starter, improve the work efficiency, and that power grid to avoid the harmonic pollution.