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Open Loop Variable Vector Ac Frequency Driv .pdf

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Open Loop Variable Vector AC Frequency Drive
Application: It can make use of textile industry and
papermaking industry.
Dimension: 220*250*387mm
Model Type: SD300 series AC frequency drive
Control mode: vector control

Product Detail
SD300 series open-loop various vector AC frequency drive is a
high-performance generic vector frequency drive,it is a new
generation technology upgrading products in SINOVO. The AC
frequency drive with the new characteristic appearance design
and use the unique way of control to achieve a high-torque,
high-precision, wide speed drives, which is the general
customer demand, customer personalized requirements and
industry characteristics, practical PI, simple PLC, flexible
input/output terminals, pulse frequency setting,main and
auxiliary setting, frequency control,fixed-length timing control,
power shutdown parameter selection etc., they are provide a
high integration solution for manufacturing industry customers,
reducing the system cost and improving the system reliability.
Open-loop vector (OLV) control is used for greater and more
dynamic motor control. It independently controls motor speed
and torque, much like DC motors are controlled.

SD300 Series Open Loop Variable Vector AC Frequency Drive
features and functions:
1. Low frequency and large torque output, VF control mode,
under low frequency of 1 Hz 150% load current waveform

2.Open-loop vector control mode, under 0.5 Hz 150% load
current waveform

3. Instantaneous non stop current waveforms, at the
instantaneous cut off occasion of the power grid input , the AC
derive maintain the stability of busbar voltage by reducing the
operating frequency to achieve the power back. When the
power input normal, it return to normal operation.

4.Fast speed tracking start and stop the current waveform,
within 300ms the AC drive complete the high-speed rotation of
the motor shaft speed to achieve rapid smooth start-up. 5. Fast
and effective hardware current limiting technology, when the
current of each phase is greater than the limit value during
detecting, the logic circuit in the 5uS forced to close the PWN
output to complete the wave limit control. The following figure
is the motor rotor under high speed rotation start-up and
three- phase current hardware current-limiting waveform.
5. In the following figure, the hardware limits of the motor
three-phase current is forced to flow through the inner limit

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