Hiconics HIVERT four-quadrant medium voltage variable speed drive has following outstanding features and functions:

- Adopt PG vector control method: output sine wave current stably in the whole frequency range

- The power-cell adopts PWM full-control rectification mode: the inverter has rated power feedback capability

- The characteristics of low frequency and high torque output meets the requirements of the hoist for the starting torque

Different Models of HIVERT Four-quadrant Medium Voltage Drive

Composition of HIVERT Four-quadrant Medium Voltage Drive

HV4 General Medium Voltage Drive is composed of 3 main parts:

1. transformer cabinet 2. power-cell cabinet 3. control system

Composition of HIVERT Four-quadrant Medium Voltage Drive

Main Features of HIVERT Four-quadrant Medium Voltage VSD

Cell Bypass and Neutral Drift

HIVERT Medium Voltage Drive

Instant Power Loss

The medium-voltage input side is temporarily powered off (within 1s)

When the grid voltage drops below 90% of the rated value, the inverter limits the power output to the load. This limitation forces the drive to draw energy from the grid to maintain the DC bus voltage, waiting for the grid voltage to recover. The limit value varies as an inverse function of speed to ensure constant power flow to the DC bus.

HIVERT Medium Voltage Drive

Medium Power Loss Function

When the grid voltage drops for more than the instantaneous power outage time, the state at this time is called high voltage power outage. The user can choose whether the inverter will report a serious fault when a medium-voltage power outage occurs; and whether the inverter will run automatically when the power is restored.

HIVERT Medium Voltage Drive Medium Power Loss Function

Synchronous Switching Technology

For soft-starting and controlling multiple motors

Up-cut (inverter to grid):

After obtaining the up-cut request, the inverter measures the input voltage frequency, amplitude and phase of the grid side through the phase-locked loop;

At the same time, the inverter takes the input frequency of the grid side as the running frequency;

When the frequency, amplitude and phase synchronization between the inverter and the grid side is completed, the input contactor of the inverter is disconnected, and the inverter coasts to a stop.

Down Cut (Grid to Drive):

After the down-cut request is obtained, the input contactor of the inverter is disconnected, the rotating load function is activated, and the motor speed is tracked to switch to the inverter running state through the speed start function.

HIVERT Medium Voltage Drive Synchronous Switching Technology

Principle of HIVERT Four-quadrant Medium Voltage Drive

While there are a number of variations in Hiconics variable frequency drive design; they all offer the same basic functionality which is to convert the incoming electrical supply of fixed frequency and voltage into a variable frequency and variable voltage that is output to the motor with a corresponding change in the motor speed and torque.

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