Inverter

The inverter power source uses a thyristor circuit to convert direct current into alternating current, which corresponds to the reverse process of rectification and is defined as an inverter. For example, an electric locomotive using a thyristor, when the downhill slope causes the DC motor to operate as a generator brake, the locomotive's potential energy is converted into electrical energy and sent back to the AC grid.

First, the principle of inverter power

A circuit that inverts direct current into alternating current is called an inverter circuit. In a specific case, the same thyristor converter circuit can be used for both rectification and inverter.
When the converter works in the inverter state, if the AC side of the converter is connected to the AC power source, the DC power is inverted to the same frequency AC power and sent back to the power grid, called active inverter. If the AC side of the converter is not connected to the grid and is directly connected to the load, that is, inverting the DC power to an AC supply with a certain frequency or an adjustable frequency, it is called a passive inverter. AC frequency control is to use this principle to work. In addition to the DC reversible speed control system, the active inverter is also used for the cascade speed regulation and high voltage DC transmission of the AC rotor rotor asynchronous motor.

Third, the functional characteristics of the inverter power supply

1. Superior grid adaptability
The wide input voltage range of 220V±25% enables the UPS to work normally in a variety of harsh grid environments, reducing battery discharge opportunities and extending battery life.
2. The cold start function can directly start the UPS with the battery pack in the state without the mains supply, to meet the emergency needs of the user.
3, superior load compatibility with strong load capacity, load compatibility, can be applied to a variety of different types of load to meet the needs of various applications.
4, perfect protection function has input overvoltage, undervoltage, output overvoltage, undervoltage, output overcurrent, short circuit, battery undervoltage, battery overcharge, power device over temperature and other protection functions to ensure the system operation reliability.
5, zero switching time built-in static electronic bypass switch, when the UPS is protected or faulty for various reasons, it can be switched to the bypass power supply without interruption, especially for equipment that has strict requirements on power-down time.
6. Perfect battery management technology provides the most reasonable charging current according to the battery parameter curve. The optimal charging current can be set according to the battery capacity. The advanced equalization and floating flow automatic conversion technology is adopted to improve battery efficiency and extend battery life.
7, high-current charger built-in high-current charger, can be used for frequent power outages, long-term power outages.
8, large-screen LCD + LED display, human-machine communication barrier-free through the LED can determine the working state of the UPS, through the LCD can look at the UPS input and output batteries and other parameters. Keep users informed about the working condition of UPS.
9. The intelligent monitoring function can communicate with the computer through the RS232 interface and the UPS intelligent monitoring software. The various operating parameters of the UPS are displayed on the communication interface at a glance. By installing an SNMP card, the UPS can also implement network monitoring functions. Through the network, various operating parameters of the UPS can be observed and managed remotely.
10, can achieve serial hot backup or parallel redundancy.