Slew

- SLEW DRIVE -

Slew Variable Voltage Frequency (VVF) drives combine the principles of slew drives with variable voltage and frequency control. Slew drives are gearboxes that manage high radial and axial loads, providing significant torque through a worm gear mechanism. They are used in applications requiring precise positioning and high load capacity, such as cranes and solar trackersVVF technology enhances motor efficiency by adjusting voltage and frequency, resulting in smoother operation and reduced energy consumptionThis combination is particularly beneficial in heavy machinery and automated systems where precision and power are critical.

There are various benefits to using a Variable Voltage Variable Frequency (VVVF) drive in slew drives.
Energy Efficiency: By altering speed to fit load requirements, VVVF drives optimise motor operation and greatly reduce energy usage.
Precise Control: They improve system performance by offering precise control over torque and speed, enabling seamless acceleration and deceleration.
Decreased Mechanical Stress: By enabling soft starts, VVVF drives reduce mechanical wear and increase the life of motors and related parts.
Lower Starting Power: Compared to conventional methods, they use less power at startup, which lowers peak demand costs.
Simplified Systems: By removing the need for extra mechanical components, VVVF drives can create systems that are more dependable and simpler.

What benefits do VVF drives in slew drives offer in terms of maintenance?
The following are some maintenance benefits of utilising VVF drives in slew drives:

- **Reduced Mechanical Wear**: Soft starts and stops are made possible by VVF drives, which reduce mechanical stress on parts and increase their longevity.

- **Fewer Mechanical Components**: VVF drives simplify systems and lower maintenance requirements by doing away with the need for extra components like contactors and throttling valves.

- **Built-in Protections**: They have built-in features including heat and overload protection, which lessen downtime and help prevent damage.

**Less Frequent Maintenance**: By preventing overloading and overheating in motors, automatic voltage and frequency control helps reduce the need for maintenance.

all settings of VVF drive

Variable Voltage Variable Frequency (VVVF) drives control motor speed by adjusting voltage and frequency. Key settings include:

- **Control Method**: Adjusts how the drive responds to input signals.

- **Motor Nameplate Information**: Essential for proper operation.

- **Speed Reference Source**: Determines how speed is set (manual or automatic).

- **Acceleration/Deceleration Times**: Controls how quickly the motor speeds up or slows down.

- **Fault Reset**: Automatically resets the drive after a fault condition. 

Advanced models offer over 200 adjustable parameters for optimization.

When setting motor speed on a VVF drive, common issues include:

Incorrect Parameter Settings: Incorrectly configured parameters can prevent the VFD from operating properly, leading to erratic motor speeds or failure to start.

Communication Errors: Faulty connections or incorrect communication settings can disrupt signals between the VFD and control panel, causing the drive to be unresponsive.

Mechanical Issues: Problems such as motor overload, binding, or internal faults can result in the motor running at incorrect speeds or not starting at all

Power Supply Problems: Insufficient or unstable power supply can lead to frequent shutdowns or failure to power on.

Acceleration/Deceleration Settings: Aggressive settings may cause overloads, while inadequate settings can lead to slow response times.

SLEW VVF DRIVE PARAMETER SETTINGS -

A1 -01- Access level selection 
       2 - Access to view and set an parameter
A1 - 03 - Initialize Parameter
      1110 : Initialize (02-03->1)
    2220 : 2 - wire instalize 
    3330 : 3 - wire instalize 
    5550 : OPE 04 - Error reset

b1 - 01 - Frequency Ref Selection

0 : Digital Operater

1 : Analog Input Terminal

b1 - 02 - Run command Selection

0 : Digital Operater

1 : Digital Zip Terminal

b1 - 03 - Stoping Method Selection
        0 : Rump to Stop 
         1 : Coast to Stop 
         2 : DC injection Breaking Stop (L2 - 03)

C1 - 01 - Acceleration Time
C1 - 02 - Deceleration  Time
C4 - 04 - Torque Complansation gain
C6 - 01 - Drive Duty Selection 
         0 : Heavy Duty  Ex. - Conveyor Belt
         1 : Normal Duty Ex. - Fan

d2 - 01 - Frequency Ref Upper limit % Max. F

        02 - Frequency Ref Lower limit % Max. F

E1 - 04 - Maximum output Fre$

E1 - 06 - Base Frequency 

S1 -  input 1 (Closed: Forward run, Open: Stop) 

S2 -  input 2 (Closed: Reverse run, Open: Stop

S3 - input 3 S4 input 4

55 input 5

S6 input 6 S7 input 7

SC -  input common (Control common)

HC  - input +24 Vdc

H1 - Safe disable input +V Analog input power supply

H1 - 01 - Terminal S1 function Selection

H1 - 02 - Terminal S2 function Selection

H1 - 03 - Terminal S3 function Selection

H1 - 04 - Terminal S4 function Selection

0 - 3Wire Sequence

40 - Forward Run

41 - Reverse Run

A1  - analog input 1 (frequency reference)

A2  - analog input 2 (frequency reference) AC Frequency reference common

AM - Analog monitor output 0 to 10 Vdc

AC  - Monitor common

     

USEFUL APARETUS FOR VVF DRIVE -

1. Screw driver 
2. Player 
3. 10/11 (T) Pana
4.