中文版
Description
rectifier (rectifier) is a device that converts alternating current into direct current, which can be used to power devices and detect radio signals. The rectifier can be ignited by a vacuum tube
Tube, solid silicon half body diode, mercury arc, etc. In contrast, the device that converts direct current into alternating current is called an “inverter” (inverter).
The standby UPS only needs to charge the battery, and does not need to supply power to the load. Therefore, only the charger is available. In a dual-change UPS, this device supplies power to both the inverter and the battery
Electricity, so called rectifier/charger.
A rectifier is a rectifier device that simply converts alternating current (AC) into direct current (DC). It has two main functions: first, it changes alternating current (AC)
Direct current (DC), filtered after the supply of load, or supply to the inverter; Second, provide charging voltage to the battery. Therefore, it also acts as a charger.
80190-380-01-R
A rectifier is a rectifier device that simply converts alternating current (AC) into direct current (DC). It has two main functions:
First, the alternating current (AC) into direct current (DC), after filtering to supply the load, or supply the inverter;
[1] Second, the battery is supplied with a charging voltage. Therefore, it also acts as a charger.
The hFE parameters of the triode are related to the storage time ts, and the triode ts as large as hFE is also larger. In the past, people’s understanding of ts and ts measuring instruments are relatively lacking
The triode selection depends on the hFE parameter.
In the switching state, the selection of hFE usually has the following understanding: First, hFE should be as high as possible, so as to obtain the maximum operating current with the least base current, and give as much as possible
Possible low saturation voltage, thus reducing loss in both output and drive circuits.
However, if the switching speed and current tolerance are considered, the maximum value of hFE is limited. Second, Chinese manufacturers have tended to choose smaller hFE devices, such as
hFE 10 to 15, or even 8 to 10 transistors were once very popular (later, due to the popular use of capacitive trigger lines in the base loop, the value of hFE increased), hFE
A small value means that the saturation depth is small, which is conducive to reducing the heating of the transistor.
In fact, the saturation depth of the transistor is affected by two factors, b and hFE, so the saturation depth can also be reduced by adjusting the magnetic ring and winding parameters and the base resistance Rb.
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