ALPHA 6910V/6920V/6930 series special AC drive integrates the motor driving and lifting logic control. It is devised with professional lifting mechanism and safety logic for wide application range, including sequential coordination and hook-slip prevention functions. Moreover, the original PLC is removed to reduce the potential faults.
It adopts integration design, which eliminates external brake or external brake power as well as the external transmitter in load sensor. The high integration simplifies the system wiring and installation and features accurate control, high safety and reliability with impact less start/brake and stable running.
Furthermore, we offer both construction-elevator dedicated integration scheme and linkage console. The linkage console comprises the wireless-call group control system, floor-selection automatic leveling system, mechanical operation system, and the load-sensor transmitting system. We can provide our venerable customers with perfect solutions.
PG close-loop vector control
Large start torque; rapid dynamic torque response
Vector control running current under load is averagely 10% lower than that of V/F mode.
Safety protections including over-voltage, under-voltage, over-current, overload, and anti-stalling
Overload prediction alarm and speeding under light load; give alarm when the load is higher than set range; allow speeding within specific range when the load is lower than a setup value
Step-less speed regulating; stable running with impactless start/brake
Soft start/stop decreases wear of gear, rack, and brake, extending parts lifetime
Fast adjusting the lifting and landing speed according to the load change even without weight sensor; avoid hook-slip and stalling
Allow over-speed running under hook clearance state; Rated frequency is 50Hz, while it can reach 100Hz at over-speed running
Wind speed surpassing prevention; detect wind speed surpassing signal and give command to stop running
Examination of torque at brake-release and brake-contracting; strict timing sequence of up-travel, down-travel, stoppage, brake-release and brake-contracting
Load limit function; Stop running when the load is over the defined value to make sure the mechanical system safety
Integrated leveling function; After the floor is selected, the floor leveling is automatically carried out to save positioning time.
Wireless call group control; Sequence the calling floors to avoid their interference with each other
Wide screen LCD display; blue background light adjustable; clear display of white characters; monitoring parameters can be selected
Special large keys suitable for workers is comfortable and with fast response.
Extension wire of keyboard can directly connected to control table, which is convenient for parameter setting and self-learning of floor height and loads.
One-stop service providing systematic digital control solution for crane, including crane dedicated inverter drive, wireless calling device, LCD displayer, floor selection device, load sensor, and speed sensor, etc.
ALPHA6900 series special AC drive is often found within the hoisting industry. It can be applied in the tower cranes, port machinery, and more.
Technical Specifications of ALPHA6900
|Power Range||380V ±20% three phases: from 5.5 to 500kW|
|Rated Input Voltage and Frequency||Three phases: 380~440V 50/60Hz|
|Allowable Input Voltage Range||220V three phases: 176～264V, Frequency fluctuation of less than ±5%
380V three phases: from 304 to 456V, Voltage unbalance rate of less than 3%, Frequency fluctuation of below ±5%
|Rated Output Voltage||From 0 to rated input voltage|
|Max. Overload Current||G model: 150% for one minute, 180% for 20 seconds|
|Control Method||V/F control, Open loop vector control, Close loop vector control|
|Frequency Range||0.00~400.00Hz (35R5GB/37R5GB and above)|
|Frequency Accuracy||Digital command ± 0.01％ (from -10℃ to +40℃)
Simulation command ± 0.01％ (25℃ ± 10℃)
|Preset Frequency Resolution||Digital command 0.01Hz
Simulation command 1/1000 of the maximum frequency
|Output Frequency Resolution||0.01Hz|
|Preset Frequency Signal||From 0 to 10V, from 0 to 20mA|
|Acceleration-Deceleration Time||From 0.1 to 3600 seconds (The acceleration and deceleration time can be preset separately.)|
|Braking Torque||The additional braking resistance reaches up to 125%.|
|Voltage-Frequency Characteristics||Four kinds of fixed V/F characteristics are selectable.
Any V/F characteristic can be preset.
The V/F control with PG is available.
|Protective Functions||Over-voltage, under-voltage, current limit, over-current, overload, electronic thermal relay, overheating, over-voltage stall, load short circuit, grounding, under-voltage protection, input phase loss, output phase loss, short circuit to ground, interphase short circuit, motor overload protection, etc|
|Ambient Temperature||From -10℃ to +40℃|
|Humidity||From 5 to 95% RH (No condensation)|
|Storage Temperature||From -40℃ to +70℃|
|Service Place||Indoor (without any corrosive gas)|
|Installation Site||The altitude is at most 1,000m. There is not any dust, corrosive gas, or direct solar radiation.|
|Vibration||Less than 5.9m/s2 (0.6g)|
|Cooling Method||Natural cooling or forced air cooling|
ALPHA6900 Selection Table
(Close Loop Vector Control)
|Motor Power (kW)||Rated Current (A)|
|380V Three Phases||35R5GB||5.5||13.0|
Overall Dimension of ALPHA6900 Series Special AC Drive for Crane
Crane Drive And Control System | Integrated Frequency Inverter | Crane Hoist Drives