ZFeng 310 Series 0.75Kw-T General Vector Variable Frequency Drive
A three-phase frequency drive is a power electronic device mainly
used to regulate the speed and torque of three-phase AC motors. It
controls the operation status of the motor by changing the
frequency and voltage of the power supply, thereby achieving
precise control of the motor performance.
The working principle of a three-phase Variable Frequency Drive is
based on the proportional relationship between the speed of the AC
motor and the power frequency. By changing the frequency of the
power supply, the speed of the motor can be altered. At the same
time, by adjusting the voltage, the magnetic flux of the motor can
be kept constant, avoiding damage to the motor due to overvoltage
or undervoltage. Specifically, three-phase frequency converters
typically consist of rectifiers, filters, inverters, and
controllers. The rectifier converts three-phase AC power into DC
power, the filter smooths the DC power, the inverter converts the
DC power into adjustable frequency and voltage three-phase AC
power, and the controller is responsible for controlling and
regulating the entire system.
Key Features:
- Precise speed regulation: Three phase frequency converters can
achieve high-precision control of motor speed, meeting the needs of
various industrial application scenarios.
- Energy saving and consumption reduction: By precisely controlling
the speed and torque of the motor, unnecessary energy consumption
is reduced and the energy efficiency of the equipment is improved.
- Improve equipment reliability: Adopt advanced control algorithms
and protection functions to ensure stable operation of equipment
and reduce failure rates.
- Easy to automate control: The three-phase frequency converter is
easy to integrate with control systems such as PLC and DCS,
achieving automated control of equipment
Application
Three phase frequency converters are widely used in various
industrial scenarios that require motor speed regulation and torque
control, such as:
- Numerical Control Machine Tool: Achieve high-precision speed
control of the spindle and feed axis.
- Printing equipment: Ensure stable speed and tension during the
printing process.
- Crane: Provides low-frequency high torque starting to ensure smooth
lifting.
- Conveyor belt: achieve multi-stage speed operation and
energy-saving control.
- Fan and water pump: achieve energy-saving operation by adjusting
the speed.
Selection Guide
When choosing a three-phase frequency converter, the following
factors need to be considered:
- Motor parameters: Select the appropriate frequency converter
based on the rated power, rated voltage, rated current, and other
parameters of the motor.
- Load characteristics: Different load characteristics also have
different requirements for three-phase frequency converters. For
example, constant torque loads require the selection of three-phase
frequency converters with high overload capacity, while variable
torque loads such as fans and water pumps can choose universal
three-phase frequency converters.
- Speed range and accuracy requirements: Determine the required speed
range and accuracy requirements based on actual application needs.
This will affect the control mode and performance indicators of the
three-phase frequency converter.
- Environmental conditions: Consider the installation environment of
the three-phase frequency converter, such as temperature, humidity,
altitude, etc. Choose a three-phase frequency converter suitable
for environmental conditions to ensure its normal operation and
service life.
