AC drives are generally known by many different names: Adjustable Frequency
Drives (AFD), Variable Frequency Drives (VFD), and Inverters. Drives are used
primarily to vary the speed of three phase AC induction motors, and they also
provide non-emergency start and stop control, acceleration and deceleration, and
overload protection. By gradually accelerating the motor, drives can reduce the
amount of motor startup inrush current.
AC drives function by converting incoming AC power to DC, which is then
synthesized back into three phase output power. The voltage and frequency of
this synthesized output power is directly varied by the drive, where the frequency
determines the speed of the three phase AC induction motor.
0 to 20 mA / 4 to 20 mA (input impedance 250
), 10 bit resolution
Outputs
Output
Terminals
Digital
2 user-programmable: Inverter Running, Inverter Fault, At Speed,
Zero Speed, Above Desired Frequency, Below Desired Frequency, At
Maximum Speed, Over Torque Detected, Above Desired Current,
Below Desired Current, PID Deviation Alarm
Analog 1 user-programmable, 0 to 10 VDC (max load 2mA), 8 bit resolution
frequency, current, process variable PV
Operating Functions
Automatic voltage regulation, voltage/frequency characteristics
selection, non-linear acceleration/deceleration, upper and lower
frequency limiters, 7-stage speed operation, adjustable carrier
frequency (1 to 12 kHz), PID control, skip frequencies, analog gain
& bias adjustment, jog, electronic thermal relay, automatic torque
boost, trip history, software protection
Shipping Port: China
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Temperature 8650-74862
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TERADYNE A1004-00003 398-723-00
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