Low
Power
Input
220V
Single
Phase
Output
220V
3Phase
AC
Vector
VFD
Variable
Frequency
Drive
A
low-power
input
220V
single-phase
to
220V
three-phase
AC
vector
variable
frequency
drive
(VFD)
is
a
device
that
converts
single-phase
AC
power
into
three-phase
AC
power
and
can
adjust
the
output
frequency
and
voltage.
It
is
suitable
for
driving
three-phase
AC
motors,
particularly
in
scenarios
where
three-phase
power
is
unavailable
but
three-phase
motors
are
required.
Below
is
a
detailed
explanation
covering
its
technical
principles,
product
features,
selection
recommendations,
application
scenarios,
and
precautions.
I.
Technical
Principles
-
Rectification
Stage
:
Converts
single-phase
220V
AC
power
into
DC
power
through
a
rectifier
bridge.
-
Filtering
Stage
:
Uses
capacitors
or
inductors
to
filter
the
DC
power,
obtaining
a
stable
DC
voltage.
-
Inversion
Stage
:
Utilizes
power
devices
such
as
IGBTs
(Insulated
Gate
Bipolar
Transistors)
to
convert
the
DC
power
into
three-phase
220V
AC
power,
controlling
the
output
voltage
and
frequency
through
PWM
(Pulse
Width
Modulation)
technology.
-
Vector
Control
:
Achieves
precise
control
of
motor
torque
and
speed
by
decoupling
the
torque
and
flux
components
of
the
motor
current.
II.
Product
Features
-
Wide
Input
Voltage
Range
:
Supports
input
voltage
fluctuations
of
±15%
or
±20%
around
single-phase
220V,
adapting
to
different
grid
environments.
-
Adjustable
Output
Voltage
:
The
output
three-phase
voltage
can
be
adjusted
within
the
range
of
0-220V
to
meet
the
needs
of
different
motors.
-
Wide
Frequency
Adjustment
Range
:
The
output
frequency
range
typically
spans
from
0-400Hz
or
0-600Hz,
enabling
stepless
speed
regulation
of
motors.
-
Vector
Control
Technology
:
Provides
high
starting
torque
(e.g.,
150%
or
180%
of
rated
torque
at
0.5Hz),
a
wide
speed
regulation
range
(1:100
or
1:1000),
and
high
speed
control
accuracy
(±0.5%
or
±0.02%).
-
Comprehensive
Protection
Functions
:
Equipped
with
protection
features
against
overcurrent,
short
circuits,
overtemperature,
overvoltage,
and
undervoltage
to
ensure
safe
operation.
-
User-Friendly
Operation
:
Features
a
digital
display
panel
and
multifunctional
input
terminals,
supporting
parameter
copying
and
remote
monitoring.
III.
Selection
Recommendations
-
Power
Matching
:
The
rated
power
of
the
VFD
should
be
at
least
1.5
times
that
of
the
motor.
For
example,
when
driving
a
1kW
motor,
a
VFD
with
a
minimum
power
of
1.5kW
should
be
selected.
If
the
load
is
heavy
(e.g.,
gear
pumps,
hydraulic
pumps)
or
there
are
stall
conditions,
a
VFD
with
at
least
twice
the
motor
power
should
be
chosen.
-
Voltage
and
Frequency
Range
:
Ensure
that
the
input
voltage
range,
output
voltage
range,
and
output
frequency
range
of
the
VFD
meet
the
application
requirements.
-
Control
Mode
:
Select
the
appropriate
control
mode
based
on
application
needs:
V/F
control
for
simple
speed
regulation
scenarios,
non-PG
vector
control
(SVC)
for
moderate
performance
requirements,
or
PG
vector
control
(FVC)
for
applications
demanding
high
starting
torque
and
precise
speed
control.
IV.
Application
Scenarios
-
Small
Mechanical
Equipment
:
Such
as
small
CNC
machine
tools,
woodworking
machinery,
and
textile
machinery,
which
typically
require
three-phase
motor
drives
but
may
only
have
single-phase
power
available
on-site.
-
Pumps
and
Fans
:
Such
as
water
pumps
and
fans,
where
precise
control
of
flow
and
air
volume
can
be
achieved
through
variable
frequency
speed
regulation,
resulting
in
significant
energy
savings.
-
Household
and
Commercial
Equipment
:
Such
as
elevators
and
automatic
doors,
which
have
high
requirements
for
starting
torque
and
speed
control
accuracy.
