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High Starting Torque Ac Frequency Converter , Motor Frequency Inverter

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Good quality VSD Variable Speed Drive for sales
Good quality VSD Variable Speed Drive for sales
1. System is started smoothly, without surge current; 2. Much higher efficiency than old system; 3. Remarkable energy saving than old system; 4. System running smoothly and stably, very low current.

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High Starting Torque Ac Frequency Converter , Motor Frequency Inverter

China High Starting Torque Ac Frequency Converter , Motor Frequency Inverter supplier
High Starting Torque Ac Frequency Converter , Motor Frequency Inverter supplier High Starting Torque Ac Frequency Converter , Motor Frequency Inverter supplier

Large Image :  High Starting Torque Ac Frequency Converter , Motor Frequency Inverter

Product Details:

Place of Origin: China
Brand Name: Kinda
Model Number: KD330

Payment & Shipping Terms:

Minimum Order Quantity: Negotiable
Price: Negotiable
Delivery Time: 3~8 Day
Payment Terms: TT
Supply Ability: Adequate inventory
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Detailed Product Description
Starting Torque: 0.5Hz/150% Torque, Speed Ratio 1:100, Dynamic Response <20ms, Steady Speed Accuracy ±0.2% Braking Method: With DC Braking, Resistance Energy Braking
High Reliability: Mature And Reliable Drive, Protection Circuit Design, Anti-interference Design PCB Protection: Spray Three Anti-paint To Protect The Circuit Board Intelligently And Efficiently
Start Up: High Starting Torque, Ensuring Smooth Start, Low Frequency Torque, No Stalling For Parking Torque: Automatic Torque Boost Compensation

Kinda Motor Frequency Converter Applied in Hoist Ppplications

1, Features of traditonal system
(1) The traditional system works at heavy load for long time, forward and reverse run frequently, the lifetime of the
system is short;
(2) High failure ratio.
(3) Low efficiency, the power factor is less than 0.8.
(4) The safety performance is bad.

2, Requests for frequency inverters (VFD)
(1) Big output torque at low frequency, it should run smoothly during working.
(2) Big overload capacity.


(3) Less failure ratio, run stably.
(4) Braking unit and braking resistor should be added.

3, Real application (Tower crane)
3. 1 system introduction

The hoist motor in the system is 55kW/380V, the load type is constant torque, to consider its heavy duty characteristic,
the frequency inverter should be selected two sizes higher as below:

High Starting Torque Ac Frequency Converter , Motor Frequency Inverter

 3.2 system diagram

High Starting Torque Ac Frequency Converter , Motor Frequency Inverter

3.3 control logic

(1) The tower crane control system provide the forward and reverse signals, while MI1 and DCM closed, the tower
crane runs forwardly, and while MI2 and DCM closed, the tower crane runs reversely:

(2) The running speed of crane is controlled by ON/OFF conditions of MI3, MI4 and MI5, details as below:

MI5 MI4 MI3 Speed
OFF OFF OFF Speed 0 (FD-00)
OFF OFF ON Speed 1 (FD-01)
OFF ON OFF Speed 2 (FD-02)
OFF ON ON Speed 3 (FD-03)
ON OFF OFF Speed 4 (FD-04)
ON OFF ON Speed 5 (FD-05)

 

(3) The inverter output a fault signal to the crane control system, while fault happen, the system will brake and stop immediately.

(4) There is an output FDT1 (controlled by F8-19 and F8-20) ON/OFF signal, while the inverter runs to the setting
frequency, this signal will control the brake to open, to avoid the reverse run happen.

3.4 autotuning

For this kind of heavy duty system, it is better to use Sensorless Vector Control (SVC) mode, it will get better output torque performance.
Before using SVC mode, please perform motor autotunning, do it as below steps:

1) Set F0-02=0 (keypad), set correct value of F2-01 ~ F2-05 (based on motor nameplate);
2) If the load can be removed from motor, please set F2-11=2 (Rotation autotuning, get better performance), if the
load cannot be removed from motor, please set F2-11=1 (Static autotuning). The keypad will display “TUNE”.
3) Press the RUN button, wait until the autotuning finish automatically.
4) Change the value of F0-01=0 (Sensorless vector control)

3.5 Parameters setting

No. Function codes Default Setting value Explanation
1 F0-01 2 0 Sensorless Vector Control
2 F0-02 0 1 External singal start / stop
3 F0-03 1 6 Multi-step speed
4 F0-17 Model depend 5s Acceleration time (adjustable)
5 F0-18 Model depend 0.5s Deceleration time (adjustable)
6 F3-10 150% 200% Torque uppee limit
7 F5-00 1 1 Forward
8 F5-01 2 2 Reverse
9 F5-02 0 12 Multi-step speed termnial 1
10 F5-03 0 13 Multi-step speed termnial 2
11 F5-04 0 14 Multi-step speed termnial 3
12 F6-02 2 2 Fault output
13 F6-05 0 3 FDT1 output
14 F8-19 50.00Hz 3.00Hz Setting FDT1 output frequency
15 FD-00 0.00% 16% Multi-step speed 0 (adjustable)
16 FD-01 0.00% 16% Multi-step speed 1 (adjustable)
17 FD-02 0.00% 30% Multi-step speed 2 (adjustable)
18 FD-03 0.00% 50% Multi-step speed 3 (adjustable)
19 FD-04 0.00% 70% Multi-step speed 4 (adjustable)
20 FD-05 0.00% 82% Multi-step speed 5 (adjustable)

 3. 6 Problems faced during commissioning

(1) For KD330-09000T4, it needs connect additional braking unit and braking resistor to consume the regenerated
energy. The parameter of FA-04 is the braking threshold, the default value is 135%. The stand DC bus voltage is
540V, 540*135%=729V, that means while the DC bus voltage reach to 729V, the Braking unit will start work.
Sometimes, the fault of over voltage will happen, please reduce the value of FA-04 to avoid it.

(2) Cause the tower working distance is too long, during down running, the inverter works at regenerated status for long time, so the braking resistor should be selected bigger, to get better performance. In this system, it is
select as 4ohm, 10kW.

 

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Contact Person: Tim

Tel: +8618665335699

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