Line sine wave output of the UPS has the following characteristics:

Line sine wave output of the UPS has the following characteristics:
(1) Due to on-line UPS, whether in the mains is normal, or power outages in the city by the machine during the inverter to the battery-powered, it loads are powered by the pure sine wave online ups inverter. Because of this, virtually eliminating the effect of any voltage fluctuations and interference from the mains to the load of work, truly non-intrusive regulator power to the load. This is obviously not any kind of interference AC power supply can be solved. When the voltage range of 180 ~ 250V city, its output voltage range up to 220V ± 3%, stable operating frequency range of the sine wave at 50Hz ± 1%.
(2) the waveform distortion coefficient line UPS output sine wave of the minimum, generally less than 3%.
(3) mains interruption can realize on-line UPS uninterruptible power supply to the load. As long as the machine battery can provide power to the UPS inverter, whether electricity is interrupted, on-line UPS is powered by the inverter to the load. Therefore, the power supply from the mains to the mains interrupt the process, on-line UPS internal action did not produce any conversion, the conversion time is zero power to the load.
(4) On-line UPS with backup UPS, compared with excellent output voltage transient characteristics. Generally l00% or 100% load load load load shedding, its output voltage range of about 1%, the change of duration is generally from 1 to 3 cycles.
(5) On-line UPS generally used above 20kHz PWM technology, the smaller the noise, about 50dB.
(6) on-line UPS control circuit, using the input transformer, the output transformer and a photocoupler device like "ferroelectric" driving part and "weak" control line portion isolated from the electrical point of view, and thus the reliability of the circuit is greatly improved. This UPS failure rate is generally low.

When the on-line UPS power supply in normal

When the industrial ups power supply power supply in normal, power input voltage noise filter removes all the way through the grid frequency interference in order to obtain pure AC rectified and filtered into the rectifier and converts AC power to DC smoothing, then divide for two-way, all the way into the charger for charging the battery, the other way supply inverter, and inverter turn DC into AC 220V, 50Hz supply load.
When utility power outage occurs, AC input has been cut off, the rectifier is no longer working, then the battery discharge the energy delivered to the inverter, and then by the inverter converts DC into AC for load. Therefore, the load, despite the utility has ceased to exist, but this time the load is not interrupted due to electricity outage, you can still operate normally.

Is the battery (maintenance-free lead-acid batteries, mostly)

Is the battery (maintenance-free lead-acid batteries, mostly) and the host is connected to the host via an inverter module converts the DC circuit mains system equipment
Power supply is mainly used for a single computer, computer network systems, or other power electronic devices such as solenoid valves, pressure transmitters provide a stable, uninterrupted
Online means regardless of the grid voltage is normal, the load to go through with the AC voltage inverter circuit, inverter circuit that is always active, on-line double conversion UPS generally structure. The so-called double-conversion computer ups power supply refers to normal working hours, power through the AC / DC, DC / AC conversion twice and then supplied to the load.
This UPS uninterruptible power supply so that the inverter has been in working condition, it is first converted by circuitry external AC to DC, and then through the high quality of the inverter to convert DC into high quality sine wave AC output to the computer. Online UPS power supply situation in the main function is regulated and prevent radio interference, while the battery charge management; backup during power outages using a DC power source (battery) power to the inverter. Since the inverter has been at work, so there is no problem switching time for the power supply, there are strict requirements of the occasion.

The inverter three phase online ups stage one pair amplifier transistor

The inverter three phase online ups stage one pair amplifier transistor is damaged, replace the same type of transistor after running for some time because they burn too much current, caused by excessive current reasons:
- Overcurrent failure. When the inverter output overcurrent, the overcurrent protection circuit does not work;
- Pulse Width Modulation (PWM) component failure, the two complementary output waveform asymmetry, a long lead-time, on-time and short the other, so that the work of unbalanced arms, even the arms are turned on simultaneously, resulting in two tube is damaged;
- Power difference between the larger tube parameters, then even if the input waveform symmetry, the output will be asymmetrical, the waveform is output transformer, causing magnetic bias, ie the flux imbalance, leading to the accumulation of down transformer saturation current surge, burn power tube, and a burn, the other also will burn.

 

In normal mains

In normal mains, electricity surge through absorption filter circuit → AC switch DC circuit AC circuit → → DC converter and convert the AC output supply load, and at the same time charging the battery; Once microprocessor control circuit detected mains interruption, → immediately convert DC three phase online ups discharge and converts alternating current circuit → AC output supply load. If UPS microprocessor control circuit detects a fault, then UPS will jump to borrow from the relay (RELAY) bypass (BYPASS), mains power supply load, and audible warning the user.

 

When the mains input is normal

When the mains input is normal, UPS will supply the electricity regulator to the load, in which case the online offline ups is an alternating electric regulator, while also charging the energy storage device such as a battery pack; When the mains interruption (accident blackout) when, UPS immediately energy storage device (such as a battery or flywheel energy storage system) through an inverter to convert alternating current to the load supply methods continue to make to maintain the normal work load and protect the load software and hardware from damage . UPS devices usually low voltage and voltage are too large to provide protection.