Famous BEDFORD AC Frequency Inverter B503D 


Product Brief:

B503 series inverter adopts DSP control system which supplies sensorless vector control(SVC) and V/F control. Comparing with V/F control, the performance of SDP has greater superiority, which consists of Built-in SVC and V/F control, it is widely aplied to high speed contro l accuracy, rapid torque response and high performance at low frequency.

Main Features:
* Control mode: Sensorless vector control, V/F control, Torque control
* Start-up torque: 0.5Hz/150%(SVC)
* Built-in breaking unit for 0.4kw to 11kw. If need to stop rapidly, please connect the brake resistance directly.
. Mult-step(8 steps)speed control: PID control, Traverse control
* Offer 4 multi-functional digital inputs, 2 analog inputs, 1 relay output, 1 analog output, 1 open-collector output.
* AVR: Can output constant voltage automatically when input voltage is fluctuating.
* Offer RS485 communication interface.
* Standard Modbus.

Power range:
Single phase 220V 1HP~3HP(0.75KW~2.2KW)
Three phase 220V 1HP~75HP(0.75KW~55KW)
Three phase 380V 1HP~860HP(0.75KW~630KW)

Introduction
Technology Features
* Input & Output
Input Voltage Range: 380/220V± 15%
Input Frequency Range: 47~63Hz
Output Voltage Range: 0 ~ rated input voltage
Output Frequency Range: 0 ~ 600Hz
* I/O features
* Programmable Digital Input: Provide 4 terminals which can accept ON-OFF inputs
* Programmable Analog Input: AI1 can accept input of 0~10V or 0/4~20mA.
* Programmable Open Collector Output: Provide 1 output terminal(open collector output or high-speed pulse output)
* Relay Output: Provide 1 output terminal
* Analog Output: Provide 1 analog output terminal, whose output scope can be 0/4~20mA or 0~10V, as chosen.
*Main Control Function
* Control Mode: Sensorless Vector Control(SVC), V/F Control
* Overload Capacity:
60s with 150% of rated current, 10s with 180% of rated current
* Starting Torque: 150% of rated torque at 0.5Hz(SVC)
* Speed Adjusting Range: 1: 100(SVC)
* Speed Accuracy: ± 0.5% of maximum speed(SVC)
* Carrier Frequency: 0.5Hz~15.0Hz
* Reference Frequency Source: Keypad, analog input, serial communication, multi-step speed, PID and so on. The combination of multi-modes and switching between different modes can be realized
* Torque Control Function: Provide multiple torque setting source
* PID control function
* Multi-Step Speed Control Function: 8steps speed can be set
* Traverse Control Function
* Non-stop when power is instantaneously cut off
* Speed trace function: Start the running motor smoothly
* QUICK/JOG key: User defined shortcut key can be realized
* Automatic Voltage Regulation(AVR) Function:
Automatically keep the output voltage stable when input voltage fluctuating
* Up to 25 fault protection:
Protection from over current, over voltage, under voltage, over heat, phase failure and overload etc.

Applications:
B503 series(Output frequency range is 0~400Hz)
Textile machinery, Plastic machinery, Light industry, Pharmacy machinery, Fan, Water Pump, Air compressor, etc.