VA series is a high performance synchronous and asynchronous AC servo driver developed for permanent magnet synchronous AC motor and three-phase asynchronous motor. VA series support RS485 communication and EtherCAT bus, and combine with the upper computer to have multiple servo drivers controlled with networking and field bus system.
3 phase 0～Rated Voltage
150% 1 min，180% 10 second， 200% 0.5 second，interval: 10 minutes (inverse time lag feature)
3 three phase 380V～480V；50Hz/60Hz
Allowable voltage range
323V～528V；Voltage imbalance ：≤3% ；allowable frequency fluctuation：±5%
Built-in as standard
Built-in as optional
Natural air cooling
Forced air cooling
synchronous motor control without encoder /asynchronous motor control without encoder
synchronous motor control with an encoder/asynchronous motor control with an encoder
0.2% rated speed on motor，180% rated torque
0 speed,180% rated torque
Range of speed regulation
Precision of steady speed
undervoltage regulation, speed tracking, torque limitation, multi-stage speed, motor self-learning, weak magnetic control, current limitation.
Designated speed mode
RS485, keyboard, terminal, analog quantity, multi-stage speed, simple PLC, PID, pulse frequency.
Braking capacity on Power Consumption
400V driver：brake unit voltage：650～750V。
Dual 485 communication ports
Dual 485 communication interface supports Modbus protocol（RTU）;standard operation panel meet remote control , up to 500 meters.
Common DC bus
The whole series meet common DC bus power supply for multiple drives.
Independent air duct
The whole series uses independent air duct design,and support radiator cabinet with installed outdoors
undervoltage, overcurrent protection, over-voltage protection, abnormal comparison level, self-learning to identify fault, protection of the module, radiator overheating protection, overload protection on driver, overload protection on motor, peripheral protection, current detection, the output of a short circuit, abnormal operation of the power,abnormal input power, EEPROM anomaly, relay and abnormal disconnection, analog input, temperature sampling disconnection, encoder, an abnormal motor overheating (PTC), communications, hardware, overload protection.
Rated power: 7.5kW and lower power grade≥93%；11kW to 15kW≥95%。
The product should be mounted vertically in the electric control cabinet with good ventilation.Horizontal or other installation modes are not allowed.it is air cooling
-10 to +40℃, the product must be de-rated output current for the ambient temperature between 40℃ to 50℃, the rated output current must be de-rated for 1% per 1℃ temperature rise
0～2000m, the product must be de-rated rated output current for the altitude above 1000 meters, the rated output current must be de-rated for 1% per 100 meters rise
3.5 m/s2，2～9Hz；10 m/s2，9～200Hz；15 m/s2，200～500Hz。
VA−H−4T7.5G and lower power grade
VA−H−4T11G and higher power grade
Drive mounting dimensions and weight
Appearance, Installation Dimensions（mm）
Digital Servo Processors
It can implement more complex control algorithms, and realize digitalization, networking and intelligence. Power devices generally use a drive circuit designed with the Intelligent Power Module (IPM) as the core. The drive circuit is integrated in the IPM, and it also has over-voltage, over-current, overload, under-voltage and other fault detection and protection circuits. Start-up circuit to impact the driver in series during the start-up process. The power drive unit first rectifies the input high-voltage power or mains power through a series full-bridge rectifier circuit to obtain the corresponding DC power. The permanent magnet synchronous AC servo motor is driven by rectifying the normal upstream power or the city power, and then by the inverter sinusoidal PWM voltage type inverter. The whole process of the power drive unit can be simply said as the process of AC-DC-AC. The main waveform circuit of the rectifier unit (AC-DC) is a series full-bridge uncontrolled rectifier circuit.
With the large-scale application of servo systems, the use of servo drives, servo drive debugging, and servo drive maintenance are all relatively important technologies of servo drives today. More and more industrial control technology service providers have conducted in-depth research on servo drives.
Servo driver is an important part of modern motion control. It is widely used in industrial robots and CNC machining centers and other automation equipment. Especially, the servo drive of variable speed control AC permanent magnet synchronous motor has become a research hotspot at home and abroad. In the design, current, speed and position 3 closed-loop control algorithms based on vector control are commonly used. Whether the speed closed-loop design in this algorithm is reasonable or not plays a key role in the entire servo control system, especially the speed control performance.
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