Briefly describe the basic working process of UPS

1. Backup type: When the early backup UPS power supply is normal, the mains power supply is directly supplied to the load through the AC bypass and transfer switch, the AC bypass is equivalent to a wire, and the inverter does not work, so the power supply efficiency is high but the quality is poor. In recent years, the backup UPS is often equipped with AC voltage regulator circuit and filter circuit on the AC bypass circuit to improve.

2. Interactive: Interactive UPS is a UPS equipment between the standby and the first working mode, which concentrates the advantages of high efficiency of the standby Tanqiao UPS and high power supply quality of the first-class UPS. **The inverter of the interactive UPS is always in the working state, with a bidirectional function, that is, when the input mains is normal, the inverter of the UPS is working in the reverse to charge the battery pack and play the role of a charger.

3. **Type: **Type UPS power supply generally adopts double conversion mode. When the mains power is normal, the first-class UPS input AC voltage, continuously charge the battery through the charging circuit, and at the same time the AC DC circuit converts the AC voltage into DC voltage, and then through the pulse width modulation technology (PWM) by the inverter, the DC voltage is inverted into AC sine wave voltage to supply the load, which plays the role of stepless voltage stabilization.

4. Double inverter voltage compensation type: Double inverter voltage compensation technology, also known as delta technology, is currently the most advanced technology in the world. It successfully applies the voltage compensation principle of the turn-and-switch surge regulation technology to the main circuit of the UPS.

1. Controller, the controller provides stable and reliable power to the computer according to the design requirements through reasonable control. Controllers play a pivotal role in UPS.

2. Battery, battery is a device for storing electric energy. When the power supply is normal, the DC power supply charges the battery; It stores electrical energy. When the mains power is interrupted, the UPS power supply will rely on the energy stored in the battery to output direct current to maintain the normal operation of the inverter; Ensure that the computer room can continue to work in the event of a power failure.

3. Static switch, the main function of static switch is to ensure the uninterrupted power supply of UPS power supply system. Through the voltage detection signal, the static switch can quickly determine that the load will be transferred from the inverter power supply to the mains power supply, or from the mains power supply to the inverter power supply, that is, the static switch, which is the key equipment to complete the conversion and ensure the reliable and uninterrupted power supply of the conversion.

4. The inverter, which converts the direct current sent by the charger or battery into AC output, is the core component of the UPS power supply, and the performance of the inverter has a decisive impact on the output waveform, efficiency, reliability, transient response, noise, volume, weight and other aspects of the UPS power supply. The performance of a UPS power supply is mainly determined by the performance of the inverter.

Answers]: a, c, e

This question assesses the function of the UPS system. The main functions of the UPS system are as follows: (1) It has the function of AC voltage stabilization, and there is no need to add AC voltage regulators; (2) It has the protection function of instantaneous power grid power failure, especially the inverter conversion time of ** UPS; (3) It has the function of backup DC power supply, which can ensure the power supply of electrical equipment during the power outage period and maintain the normal operation of the equipment; (4) There is a certain filtering function, which can filter out some power grid interference signals and play the role of purifying the power supply.