The Kewol Four-Quadrant Vector Inverter adopts PWM-controlled IGBT rectification technology to achieve bidirectional control of rectification and energy feedback. With a power factor close to 1, it enables true four-quadrant operation. This series of inverters can feed back the inertial energy of the load to the power grid, and is equipped with regenerative function and braking function. It is suitable for potential energy loads requiring energy regeneration, energy conservation and environmental protection, as well as large-inertia loads requiring rapid deceleration. As a high-performance energy-saving product meticulously designed by Kewol Electric to meet customer needs, it delivers significant energy-saving effects.
Technical Specifications
●Power Range: 380V 0.75-710KW
●Input Voltage: 380V±15%
●Communication Methods: Modbus-RITU, Modbus-TCP/IP,
PROFINET, PROFIBUS-DP, CanLink, Canopen, ASI
●Output Frequency: 0.1Hz～400Hz
●Analog Signal Input: 2 channels (AI1/AI2) 0～10V or 0～20mA DC
●Analog Signal Output: 1 channel (AI3) -10～10V DC, 2 channels (AO1/AO2)
●Programmable Input: 7channels (X1～X7) multi-function terminal input
●Collector Output: 2channels, 0～50mA, programmable,
multiple output options available
●Set Voltage Source: 1 channel, +10V, 5mA
●Relay Output: 2channels, programmable, contact rating: 250V AC/3A or 30V DC/1A
Product Model
● Provides comprehensive fault protection functions (including overvoltage protection, undervoltage protection, overcurrent protection, module protection, heatsink overheating protection, motor overload protection, external fault protection, etc.), ensuring safety and reliability.
● Complete energy regeneration drive: Equipped with a cabinet containing an energy-regenerative power supply unit, which includes all components for energy-regenerative operation (including the input-side filter). The energy-regenerative power supply unit enables energy conversion between motoring mode and generating mode; the power supply unit automatically feeds back regenerated energy to the power grid in a sine wave manner, resulting in low grid-side current harmonics. Since no braking unit or external braking resistor is required, installation is simpler; it is more energy-efficient and environmentally friendly.
● Rich peripheral interfaces to meet various application scenarios.
● Multiple communication methods: Standard MODBUS communication, optional PROFIBUS, supporting multi-machine communication and enabling coordinated control of multiple machines.
● New PWM dead-time compensation technology, which effectively reduces motor noise and motor losses.
● Excellent open-loop and closed-loop vector control performance, significantly improving the dynamics and stability of the system; excellent torque control performance, achieving precise torque control.
A four-quadrant Vector Inverter is a new type of rectifier that converts alternating current (AC) to direct current (DC). It is typically connected to an inverter and an asynchronous motor, used in AC-DC-AC drive electric locomotives, and is particularly suitable for speed control systems requiring frequent traction and regenerative braking; high-frequency energy feedback regenerative braking; and environments with high requirements for grid power quality, such as speed control systems requiring frequent traction and regenerative braking.
