AC70T Crane Purpose VFD Manual
4
d
display
Two file 5 digital tube display
Can monitor two state variables
Parameter copy
Can upload or download function code information of inverter to realize fast
State monitor
Output frequency, given frequency, output current, input voltage, output
voltage, motor speed, PID feedback, PID given value, module temperature
Fault alarm
,Over-voltage, under-voltage, over-current, short circuit, phase failure,
overload, overheat, overvoltage stall, current limit, or data protection
Environ
ment
Install place
altitude
≤
1000m,above 1000m down the rated amount, each increase of
100m down the rated amount of 1%;no condensation, ice ,rain, snow, hail;
solar radiation below 700W/
㎡
, air pressure 70-106 kPa
Temperature, humidity
-10~+50
℃
, above 40
℃
down the rated amount, the max temperature:60
℃
Vibration
9
～
200Hz,5.9m/s2(0.6g)
Store temperature
-30—+60
℃
Installation
Hanging type, cabinet type
Protection degree
IP20
Cooling mode
Forced air cooling
1.4 Product Features
1. Special VFD for lifting
: high working efficiency, fast response, good speed regulation performance, stable
operation, no impact and high safety factor.
2. Stall protection function (closed-loop mode)
: When the actual speed is detected to exceed 115% of the rated
speed during operation, the frequency inverter signal sends a brake signal to achieve emergency braking.
3. Anti-slip protection function (closed loop mode)
: In the closed loop mode, when the inverter is energized in the
standby state, when the motor is detected to rotate, the function is activated immediately, and the inverter is locked at
the zero speed output, which provides the system operation. It has maximum security.
4. Zero servo hover function (closed loop mode)
: that is, at zero speed, keeping the brake open and keeping the
lifting mechanism hovering in the air.
5. Full-range torque monitoring function
: Torque monitoring during operation, when the torque output is detected,
immediately block the output and achieve emergency stop.
6. Remote monitoring module (extension)
: realizes remote positioning, online monitoring, remote fault diagnosis
and other functions of mechanical equipment; provides customers with a wider range of value-added services.
7. Light-load high-speed function
: When running in the light load or empty hook state, the frequency is
automatically increased (constant power zone) through the built-in load measurement mode calculation, effectively
improving the working efficiency of the lifting machine by 10% to 50%.
8. Output abnormal protection
: torque monitoring during operation, when the torque output is detected or no load,
immediately block the output and achieve emergency stop.
9. The rotary operation is stable
: the low-speed operation is smooth and coherent, there is no stop-and-go
phenomenon, the gear position is stable, the boom is continuous and smooth, and there is no “pause” phenomenon.
10. Rotary eddy current control
: The built-in eddy current controller adopts PWM pulse width modulation to adjust
the output voltage duty ratio in real time according to the operating frequency, which is superior to the traditional eddy
current voltage regulation module.
11. Flexible torque control (slewing)
: The “soft belt” is powerful and fast, and the boom does not rebound smoothly.
12. Anti-sway function (variable)
: The swing is limited by dynamically adjusting the frequency of the inverter and the
acceleration/deceleration time. When the object reaches the set speed, the swing is small or basically stops when it
stops.
13. Special brake logic control
: realize the special brake logic control through the release frequency, release current,
