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2025
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The TH-HVF series high-voltage variable frequency drives by Tenghui Electric are applied to 10kV permanent magnet synchronous motors.
Classification:
In an auto production line's stamping and welding workshop in Fujian, a 1250kW chiller operates precisely under the control of Tenghui's TH-HVF series high-voltage variable-frequency drives, maintaining stable temperatures while achieving record-breaking energy-saving performance.
At A certain place in Fujian Automotive production line's stamping and welding workshop, 1250kW ice machine At Teng Hui TH-HVF Series High-Voltage Frequency Converters Driven by, Precise temperature control ensures stable operation, while energy-saving data reaches new highs.
As an industrial refrigeration system "The 'Power Heart'—the coordinated performance of the motor and inverter directly determines the operational efficiency of the unit. In this project, our newly launched 10kV chiller unit solution features a highly efficient permanent-magnet synchronous motor paired with our custom-designed high-voltage inverter, fundamentally addressing the industry’s longstanding pain points: traditional chillers’ 'fixed-frequency operation, energy-efficiency bottlenecks, and temperature-control delays.'
Project Background ：
- For Achieve Better ways to enhance energy efficiency, Within the project The main motor of the ice machine utilizes High-magnetic-density, low-loss, high-power-factor Permanent Magnet Synchronous Motor , compared to traditional asynchronous motors, energy efficiency is improved 8%-12%, with no slip losses during low-speed operation and stable torque output at high speeds. However, compared to traditional asynchronous motors, the permanent-magnet motors used in this project also feature unique characteristics such as wide frequency range and high-speed capabilities—challenges that pose an extraordinary technical test for conventional high-voltage variable-frequency drives. In this project, the motor Frequency 0 to 233.33 Hz, rotational speed 7000 rpm ；
- Requiring the frequency converter to drive the ice machine to operate stably and intelligently while supporting wide-screen output and high rotational speeds is a critical indicator related to maintaining stable production capacity in the automotive industry.
- Under the project's stringent high standards for the efficient and energy-saving performance of refrigeration units Traditional Variable Frequency Drive A temperature control accuracy of ±1℃ simply cannot meet the requirements. How can we achieve precise temperature control and ensure stable, long-term operation? This presents a completely new challenge for the advanced temperature-control technology used in high-voltage inverters.
Leveraging its deep-rooted technological expertise in the high-voltage variable frequency drive field, Tenghui and its team have developed a dedicated high-voltage VFD solution tailored specifically for permanent-magnet synchronous motor-based refrigeration units. — Featuring an ultra-wide output frequency range of 0–233.3 Hz as its core highlight, this solution addresses the significant fluctuations in cooling capacity demands and the complex operating conditions typical of refrigeration units. It enables seamless transitions across the entire frequency spectrum—from low-frequency startup to ultra-high-frequency full-load operation—effectively breaking free from the traditional limitations of fixed 50Hz operation. As a result, motor operation is perfectly synchronized with cooling demand, achieving "frequency resonance" for optimal performance.
Use After the TH-HVF series high-voltage frequency converter:
- In terms of inrush current, the inrush current typically ranges from normal Reduced by approximately 7 times to 1.1–1.5 times the rated value, with smooth and impact-free startup; Inverter with Built-in Rectifier Topology and Harmonic Suppression Module , strictly control harmonics, ensuring stable system operation.
- In terms of adaptability, The TH-HVF series inverters are exceptionally well-suited for wide-bandwidth, high-speed motors, delivering stable operation across an ultra-wide output frequency range of 0–233.3 Hz—a breakthrough achievement in the field of variable-frequency control.
- In terms of precise temperature control and optimal cooling capacity matching, inverter After stable operation within the ultra-wide output frequency range of 0–233.3 Hz, this system leverages a vector control algorithm and an intelligent sensor-based control mechanism to achieve temperature control accuracy as precise as ±0.3°C—significantly surpassing the ±1°C deviation typically seen in conventional fixed-frequency units. This ensures that neither "insufficient cooling capacity" nor "energy waste" becomes an issue. Moreover, this "on-demand output" regulation mode guarantees that every kilowatt-hour of electricity is precisely converted into effective cooling power, minimizing energy losses at the very source.
- In terms of energy efficiency, Variable Frequency Drive Intelligent tracking, real-time feedback, and rapid response, Precisely control the speed of the permanent magnet motor to match the thermal load requirements of the refrigeration system. , compared to before the renovation System energy consumption reduced More than 30% 。
Within the project Applied Tenghui Electric's core innovative technology —— By adopting an intelligent control strategy that dynamically adjusts motor speed and torque, the system perfectly addresses industry challenges such as large inrush current during high-voltage permanent magnet motor startup, poor system stability, and inaccurate temperature control—achieving a dual breakthrough in smooth starting and highly efficient, energy-saving operation. This technology has already been widely introduced to the market and is now extensively used in supporting equipment from brands such as Midea, Carrier, and Gree.
Tenghui Electric High-Voltage Frequency Conversion in Permanent Magnet Synchronous Motor Refrigeration Unit The application , not only on the technical level “Breaking the deadlock” is also a “powerful tool in real-world applications,” helping industry clients embrace low-carbon development while reducing costs and boosting efficiency—from data centers and petrochemicals to biopharmaceuticals and food processing. We help customers build refrigeration systems that are “more energy-efficient, more stable, and longer-lasting,” enabling a swift transition from “technological investment” to “tangible value returns.”
Focus on us
Xiangyang Tenghui Electric Manufacturing Co., Ltd.
Address: No.31, Qilihe West Road, Fancheng District, Xiangyang City, Hubei Province
Technical advice:86-0710-3129518
Sales:86-0710-3540669
Business Manager:86-18871091455
Fax: 86-0710-3236122
E-mail:xythdq@126.com