NC EVFD series low voltage industry AC drives realize soft start and soft stop of screw compressor, which reduces the starting shock and prolongs the service life of the equipment. The screw compressor can automatically adjust the motor speed according to the loading needs, so as to make the whole system run smoothly and reduce the frequent loading and unloading of the motor, and to a certain extent, save the electric energy for the enterprise.
Headquartered in Beijing, Nancal Technology Co., Ltd. is a listed company on the main board of the Shanghai stock exchange, with the stock code of 603859.
Shanghai Nancal Electric Co., Ltd. is the holding subsidiary of Nancal Technology. The company is specialized in the research and development, production, sales and service of Medium-voltage variable frequency converters, low-voltage industry AC drives, shore power, active harmonic filter, static var generator and other power electronic products. The core R&D team are have professional background and fully experience in Robicon, Siemens, GE and other companies. They have led to participate in the National Energy Administration Organization of 20MW Medium voltage AC drives used for West-east gas pipeline.
6-Nancal EVFD series low voltage Industry AC drives
The output voltage of NC EVFD series industry drive is 400V/480V/690V. It adopts common DC bus multi-drive scheme. The DC bus capacitor adopts long life metal film capacitor. The product is modular design, with maximum power up to 6000kW by power module parallel. The control algorithm adopts high-performance field orientated vector control, which can drive asynchronous motor and synchronous motor, supports four-quadrant operation, and is suitable for applications requiring high performance and high reliability. The specific features are shown below:
* Modular design, multi-drives with common DC bus.
* Diode rectifier, IGBT 6-pulse rectifier or IGBT PWM rectifier.
* DC capacitors use metal film capacitors, maintenance free in whole life cycle.
* Isolated air duct design, no electric devices in airflow path, suitable for harsh environment.
* DSP+FPGA+ARM three core control platform, high performance, high reliability and strong operational capability.
* The main components of control hardware are with latest generation, risk-free for suspend production or technology outdated.
* A great variety of communication interfaces, no need extensions in general application. Standard support Ethernet、Modbus、CAN、Profibus and other communication protocols, and can communicate with almost all industry network.
* Variety of expansion interfaces to meet most applications.
* Customized fiber optic protocol, only need a pair of fiber optic between main control panel and power module to implement the real time transmission of data and synchronous pulse. A main control panel can connect 16 power modules at same time (no need additional reactor for module paralleling).
* Rapid dynamic response and excellent torque performance at low speed based on advanced motor flux model and control algorithm.
* Two vector control modes: open loop vector control (OLVC) & close loop vector control (CLVC). Control system keeps estimating motor speed in real time through the motor model, so that it can seamlessly switch to OLVC mode in the event of a speed sensor failure.
* Suitable for asynchronous motor and permanent magnet synchronous motor.