Times：2025-12-04 16:46:27
In the high-voltage environment and complex electromagnetic interference of the power system, "isolation" and "reliability" are the core requirements for ensuring equipment safety and grid stability. As a professional manufacturer deeply involved in the optocoupler field, its optical relay products have passed multiple international safety certifications such as UL, VDE, CQC, etc., and are compatible with mainstream products from Europe, America, Japan, and Taiwan. AOTE optocoupler relays have become the preferred solution to replace traditional electromagnetic relays due to their contactless design and ultra-high isolation performance. It also provides a highly stable domestic solution for the power system.
The core difference between AOTE optical relay and traditional relay lies in the design without mechanical contacts, which completely avoids the inherent defects of traditional relays.
1. The primary advantage is the significant increase in lifespan and reliability
Traditional relay mechanical contacts are prone to wear and tear, with a lifespan of only 100000 to 1 million cycles. They are prone to adhesion at low temperatures and oxidation at high humidity. The AOTE optocoupler relay achieves contactless control through LED and photosensitive components, with a longer lifespan and stable operation even in vibration and impact environments.
2. Better response speed and energy consumption performance
Its switching speed is only 0.1-1 milliseconds, which is 5-15 times faster than the traditional relay's response speed of 5-15 milliseconds, making it suitable for high-frequency switching scenarios. The driving current only needs 5-20mA, and the energy consumption is much lower than that of traditional relays driven by electromagnetic coils, making it suitable for battery powered equipment.
3. Better electrical performance
The isolation voltage can reach up to 5000vrms, exceeding the level of traditional relays 1500-2500V. The photoelectric isolation design can also effectively resist electromagnetic interference. At the same time, the volume is reduced by more than 30% compared to traditional relays of the same specifications, which helps to miniaturize and integrate the equipment
Core application scenarios
Photovoltaic inverter system: power device drive and signal isolation
As the core equipment for converting DC power to AC power, photovoltaic inverters need to achieve precise driving of power devices such as IGBT/MOSFET and reliable isolation between control circuits and power circuits. AOTE optical relay optocoupler serves as the gate driving unit, providing sufficient driving current and insulation strength to ensure fast and stable switching of power devices; As a signal isolation unit, it realizes the isolated transmission of sampling signals from the main control unit, avoiding power loop interference from entering the control core.
Power measuring instruments: signal conditioning and anti-interference transmission
Smart meters, power quality analyzers, and other power measurement equipment require precise collection and isolated transmission of weak voltage and current signals. AOTE optical relay optocouplers have the characteristics of low input current and high linearity, effectively suppressing harmonic interference and the impact of grid fluctuations on measurement results in power systems.
Energy storage system: battery management and charge discharge control
The battery management unit (BMS) of the energy storage system needs to achieve voltage balance control, charge and discharge circuit switching, and fault protection functions for multiple batteries. AOTE optical relay optocoupler is used in this scenario for signal isolation and transmission between battery modules to avoid damage to the control unit caused by high-voltage crosstalk in the battery pack; At the same time, in the switch control of the charging and discharging circuit, its contactless characteristics can ensure reliability under frequent switching, and with a wide voltage adaptation range, meet the application requirements of different specifications of energy storage systems.
Selection Recommendation
The operating environment of the power system is complex, characterized by strong electromagnetic interference, wide voltage fluctuations, high and low temperature cycles, and long-term continuous operation. Its core requirements are concentrated in:
1、Efficient isolation capability (to resist common mode interference and ensure the safety of personnel and equipment)
2、Stable switch performance (suitable for frequent on-off scenarios, extending service life)
3、Wide range environmental adaptability (tolerance to high and low temperatures, humidity, and voltage surges)
4、Accurate signal transmission (ensuring the accuracy of control instructions and monitoring data)
Clarifying these requirements is a prerequisite for selection, which can avoid system failures caused by mismatched device performance and scenarios
AOTE optocouplers have effectively solved the pain points of traditional optical relays in power system applications through comprehensive upgrades in switching speed, reliability, isolation performance, and other aspects, becoming an important supporting device for promoting the intelligent upgrade of power systems. With the development of the power system towards new energy and grid, the application scenarios of AOTE optical relay optocouplers will be further expanded, and their technical performance will continue to iterate, providing a more solid guarantee for the safe and efficient operation of the power system.
