VFD-F Series

This parameter is used with slip compensation Pr.7-04 to Pr.7-05 and electronic thermal relay Pr.6-06 to Pr.6-07. An incorrect setting will cause these functions to not work incorrectly and may damage the motor and drive.

The full-load current of the motor must be equal to or less than (but not less than 50%) the rated current of the AC drive.

07 - 03

No-load Current of Motor

 

Factory Setting: 30%

 

 

 

 

 

 

Settings

1~99%

 

Unit: 1

This parameter sets the no-load current of the motor.

 

Pr.7-03 = (no load current / drive rated current)

 

Example: If the rated current of the AC drive is 150A and no-load current of the motor is 40A, then Pr.7-03 should be set to 27%.

This parameter is used with slip compensation Pr.7-04 and Pr.7-05. An incorrect setting will cause the function to work incorrectly and may damage the motor and drive.

If the no-load current of the motor is unavailable, it may be found by running the motor with no load and reading the current on the keypad display.

07 - 04

Auto Slip Compensation Gain

 

Factory Setting: 0.0

 

 

 

 

 

 

Settings

0.0~3.0

 

Unit: 0.1

This parameter is set to auto slip compensation gain.

 

Rotor speed of the motor (output frequency of AC drive) can’t synchronize due to induction motor characteristic. The difference between synchronization speed and rotor speed is called slip frequency. Slip frequency is in direct proportion with output torque and output current. Therefore, slip compensation could make rotor speed and master frequency command the same according output current (lo).

The equation of slip compensation is (07-05) X (07-04) X (Io-(07-03)) / ((07-02)-(07-03)). If rated current of AC drive is 150A, full-load current of the motor is 120A, no-load current is 40A, rated slip frequency is 5Hz and output current of AC drive is 100A. At this time, slip compensation is (07-04) X 5 X (100-40) / (120-40) = 3.75 X (07-04). If 07-04 is set to 1.0 and the compensation is 3.75. If master frequency command is set to 50Hz and output frequency is 53.75.

Output frequency after compensation is limited by 01-07 upper bound frequency. When using slip compensation, 01-07 should be set to the suitable value.

When PID feedback control, slip compensation function will be disabled.

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Delta Electronics VFD-F Series manual Factory Setting

VFD-F Series specifications

Delta Electronics has established itself as a leader in the production of Variable Frequency Drives (VFDs), and the VFD-F Series exemplifies their commitment to innovation and efficiency in motor control solutions. Designed for a wide range of applications, the VFD-F Series ensures seamless operation in various industrial settings, from pumps and fans to conveyor systems and HVAC equipment.

One of the primary features of the VFD-F Series is its compact design, which allows for easy integration into existing systems without consuming excessive space. This makes it an ideal choice for projects where space is limited. The series also boasts a high IP20 protection rating, ensuring that the drives are safeguarded against dust and accidental contact, contributing to their reliability and longevity.

The VFD-F Series utilizes advanced control technologies, including vector control and scalar control. Vector control provides precise torque and speed control, allowing for optimal performance under varying load conditions. This is particularly advantageous in applications requiring high accuracy, such as robotics and machine tools. The scalar control mode, on the other hand, is simpler and suitable for applications where precise control is not as critical.

Energy efficiency is a hallmark of the VFD-F Series. By allowing users to control motor speed and torque based on the actual demand, these drives can significantly reduce energy consumption compared to traditional fixed-speed motors. Coupled with Delta's energy-saving algorithms, the VFD-F Series not only promotes sustainable operation but also helps lower operational costs.

Another key characteristic of the VFD-F Series is its user-friendly interface. The intuitive control panel and programmable features enable quick setup and adjustments. Furthermore, the series supports multiple communication protocols, including Modbus, CANopen, and EtherCAT, which facilitate integration into various automation systems.

Safety features are paramount in the design of the VFD-F Series. It includes built-in protections against over-voltage, over-current, and overheating, ensuring safe operation in demanding environments. Additionally, its compliance with international safety standards underlines its reliability and robustness.

In summary, Delta Electronics' VFD-F Series stands out with its compact design, advanced control technologies, energy efficiency, user-friendly interface, and integral safety features. These characteristics make it a formidable solution for industries seeking high-performance motor control while maximizing efficiency and safety. As the demand for integrated and intelligent automation solutions grows, the VFD-F Series is well-positioned to meet these challenges head-on, reinforcing Delta Electronics’ reputation as a pioneer in the field.