KE600 frequency inverter uses a shaft encoder or shaft sensor on
the motor to give motor shaft position indication back to the PID
controller for correcting position error on the fly. With the shaft
encoder, the behavior of the motor is sensed and fed back to the
controller for performance monitoring and adjustment. From there,
our frequency inverter gets its name: closed loop VFD. Thanks to
advanced vector control, accurate V/F ratio adjustment can be
achieved, which in turn allows precise control of motor speed and
KE600 closed loop vector control VFD represents an improvement over
the KE300 series in dealing with complicated motor load
applications. The closed loop vector control variable frequency
drive takes the control performance of any asynchronous motor to
higher levels. KE600 frequency converter is widely used in
applications where heavy loads need to be lifted, printing, dyeing
and packaging done accurately, and certain lengths of materials
need to be wound up into a roll.
These occasions usually have high requirements for accurate speed
regulation, quick response to changes in load torques, and high
torque output at low frequency.
Features of Frequency Inverter
1. Energy Efficiency
Many applications do not require the motor to operate at full speed
all the time. Lacking speed adjustment means wasting energy. With
our inverter, customers from almost any motor power application
fields can find the most energy saving solution for their
2. Compatibility with A Variety of Shaft Encoders
This adjustable-speed drive is compatible with kinds of encoders
such as A.B.Z differential encoder and open collector encoder.
3. Switching between Drive Modes
Our frequency inverter supports two sets of motor parameters. Hence
switching between two motor drive modes can be achieved by
adjusting those parameters.
4. User-Friendly Interface
RS485 international standard communication interface is optional.
MODBUS communication protocol is supported.
5. Accurate Parameters Identification
Automatic fine tuning of motor parameters allow more accurate
6. High Precision Torque Control
Torque control can be achieved under PG vector control mode. The
control accuracy reaches ±5%, making it easy to complete tension
control of a coiler by using the AC drive.
7. High Starting Torque
The closed loop vector control VFD can provide 150% starting torque
(under vector control without PG) when the frequency is 0.5Hz. It
offers 180% torque at zero speed (under vector control with PG)
when the frequency is 0.5Hz.
8. Fast Dynamic Response
Dynamic response time is less than 5ms under vector control without
9. Powerful Expansion Capability
Customers can choose I/O expansion cards, injection molding machine
cards, PG cards and communication cards based on what they need.
10. Powerful Upper Computer Software
Our upper computer software supports uploading and downloading
between frequency inverter and PC as well as real-time display.
Control Functions of Frequency Inverter
1. Common DC Bus: A number of frequency inverters can share a
common DC bus and their capacities are automatically balanced.
2. Torque Control: Torque control with and without PG are all
3. Overload Protection: Torque during operation is automatically
controlled to prevent frequent tripping caused by overcurrent.
4. Swing Frequency Control: Multiple triangular wave frequency
control is exclusively used for spinning.
5. Fixed Time/Fixed Length/Counting Control
6. Overvoltage & overcurrent control: The current and voltage
during operation are all automatically controlled to avoid tripping
operations due toovercurrent and overvoltage.
7. Rotate Speed Trace and Restart: Smooth start of rotating motor
without impact can be achieved. Hence, safety of the motor and the
load can be protected to the maximum degree.
8. Quick View of User Parameters: Quick view of parameters set by
users contributes to convenient debugging.
9. Fault Protection: The variable frequency drive provides
protection in case of faults like overload, phase loss, short
circuit, overcurrent, overvoltage, undervoltage, etc. Detailed
information of operation status of the motor speed controller is
recorded. The inverter drive also has automatic recovery function.
Special Functions of Frequency Inverter
Multiple Motor Switching: The variable frequency drive controls
parameters of two motors. Swit