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EPS inverter inverter circuit detail - drive circuit

Fire Emergency Power (EPS) systems play a vital role in ensuring that critical equipment continues to provide power in the event of a mains failure or other emergency. Among them, the inverter circuit is one of the core components of the EPS system, which is responsible for converting direct current (DC) into alternating current (AC) to drive various emergency equipment. This paper will discuss the inverter circuit in EPS inverter, focusing on the driver circuit.

MAIN CONTENT

Function and effect

The drive circuit plays a crucial role in the inverter, which is mainly responsible for controlling the switching state of the switching components to ensure that the inverter can operate stably in accordance with the preset working mode. The driver circuit directly affects the performance and efficiency of the inverter by providing appropriate signals to adjust the switching frequency and on-time of the MOSFET or IGBT.

Design of drive circuit

Effective drive circuit design usually includes the following aspects:

Push level conversion: The drive circuit needs to convert the low level signal output by the microcontroller or digital signal processor into a high level pulse signal that can effectively drive the MOSFET or IGBT.

Protection circuit: The integration of protection mechanisms (such as overvoltage and overcurrent protection) in the drive circuit can increase the reliability of the system and avoid damage to the switching components due to improper conditions.

Phase management: For polyphase inverters, the drive circuit needs to accurately manage the phase of each switching element to ensure the output AC signal waveform quality and frequency stability.

Isolation design: In some cases, the drive circuit and the high-voltage part need to be electrically isolated to ensure safe operation.

Drive technology

The driver circuit can be implemented using analog or digital technology, and the current popular technologies include optical coupling drivers, IGBT drivers and MOSFET drivers. In high frequency applications, the use of dedicated drive integrated circuits (ics) can greatly simplify the design and improve stability and reliability. At the same time, these ics usually integrate multiple functions, such as dead-time control, fault detection, etc., to optimize the performance of the inverter.

CONCLUSION

The inverter circuit of an EPS inverter is a core part of ensuring normal power supply in the event of a power failure. The design of the drive circuit is directly related to the efficiency, stability and reliability of the inverter.

EPS BATTERY SERIES

The centralized power supply for fire emergency lighting is a kind of backup power supply equipment, which provides power guarantee for emergency lighting equipment to ensure that the on-site lighting equipment can operate normally in emergency situations such as fire. Provide a long-term backup power supply to meet the needs of the emergency lighting system.

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