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The ZINVERT series intelligent high-voltage variable frequency drive system is a new generation of high-voltage frequency converters independently developed by Zhiguang. It adopts a cascaded power unit topology and phase-shifted SPWM control technology, which can directly output 6kV and 10kV voltages without the need for a step-down output transformer, thereby achieving precise speed regulation of high-voltage AC motors over a wide operating range.

HVFD Eight Advantages
1.Superior high and low voltage ride-through technology：

It does not shut down in the range of 65% to 115% Ue fluctuation of the grid-side voltage, and within 60s of the grid-side voltage dropout, it starts by itself without.

2.Direct starting of rotating loads with proprietary "STT" technology：

Adopting the original "STT" algorithm, it ensures that the motor can be started without stopping at any speed within the speed range, and can be started directly without impact, which has been verified through testing by national institutions.

3.High-voltage output sudden short-circuit "SCP" protection technology：

Adopting the patented "SPC" protection technology with multiple short-circuit protection functions, it can effectively protect the safety of the motor and the system.

4.Separate power supply technology for transformers with high short-circuit insulation impedance：

Low-voltage debugging mode enables convenient debugging and easy problem troubleshooting, shortens the debugging cycle, and improves reliability.

5.Adaptive acceleration and deceleration adjustment：

Improve the short-circuit resistance of the transformer, guarantee the stability of the power supply of the unit, reduce the losses generated by daily operation, and save energy and increase efficiency.

6.Unique cooling structure adapts to air-cooled and water-cooled flexible design：

Adopting special structural design, high heat dissipation efficiency, small system volume, low requirements for temperature, humidity, dust, gas and other environmental requirements, air-cooled, water-cooled to meet the needs of customers in multiple scenarios.

7.Low power sensitivity and high operational stability：

Adopt three-way power supply circuit design, low sensitivity to power supply. Adopt software and hardware multiple anti-interference technology to ensure the stability of system operation.

8.Fully In-House R&D and Manufacturing Ensure Quality and Cost Competitiveness：
Leveraging Zhiguang’s extensive experience in high-power power electronics and patented technologies, we independently research and manufacture core components—such as power units, phase-shifting transformers, and control systems—thereby guaranteeing both product quality and cost advantages.

Technical Parameter
Voltage level：2.3kV，3kV，3.3kV，6kV，6.6kV，10kV

Input

Phases、Frequency: Three-phase, 50/60±5%Hz
Voltage range: (Normal operating rating) / -15%~35% (Reduced rate)
power factor: >0.96 (>20% load)

Output

Overload capacity： 130% In 1 min/10 min; 180% In immediate protection;
Voltage：0~Un (rated voltage), carrier phase-shifted superimposed waveform；
Frequency：0~50Hz/60Hz
Current Harmonics (THD): <2% (rated power)

Overview Features Technical Parameter Downloads