According to the different nature of the regulator's output, the general regulator is divided into AC (AC regulated power supply) and DC voltage regulator (DC regulated power supply) two categories. The following focuses on the DC regulated power supply, referred to as the regulated power supply.
According to the working state of the adjustment tube, the regulated power supply is usually divided into two categories: linear regulated power supply and switching regulated power supply. In addition, there is a small power supply using the voltage regulator tube.
Switching regulator
Switching regulators use the output stage, repeat switch "on" and "off" state, and energy storage components (capacitors and sensors) together to produce output voltage. The adjustment is realized by adjusting the switching timing according to the feedback samples of the output voltage. In a fixed frequency regulator, the switching timing is regulated by adjusting the pulse width of the switching voltage, which is called the PWM control. In a gated oscillator or pulse mode regulator, the width and frequency of the switch pulse remain constant, however, the "on" or "off" of the output switch is controlled by the feedback.
According to the arrangement of the switch and energy storage components, output voltage can be more or less than the input voltage, and can use a multipleoutput voltage regulator. In most cases, the input and output voltages of the same requirements, pulse (step-down switching regulator) efficiency than linear regulator power supply higher conversion. Compensation: high precision AC regulated power supply compensation (single-phase three-phase 1.5kVA 0.5kVA and above, and above) compensation transformer, 110V output.
Linear regulator
LDO is a linear regulator. Linear regulator used in the operation of a linear area oftransistors or FET from the input voltage application is subtracted from the excess voltage, generated by adjusting the output voltage. The voltage drop of voltage regulator, refers to maintain the output voltage at its rated value within 100mV under the required input voltage and output voltage difference between the minimum value. Is the output voltage of LDO (low dropout regulator) usually use power transistor (also called as PNP transmission equipment). The transistors are allowed to saturate, so the regulator can be have a very low dropout voltage, usually about 200mV; and compared, using composite NPN power transistor of traditional linear regulator pressure drop is about 2V. Negative output LDO using NPN as its transmission equipment, the operation mode and the output of LDO PNP equipment is similar.
The updated development using CMOS power transistor, it can provide the lowest voltage drop. The use of CMOS, only through the voltage drop of the regulator is ON resistance caused by the load current of the power supply equipment. If the load is small, this way of pressuredrop dozens millivolts.
With the regulator of laser cutting machine
According to the requirements of the use of high-power laser cutting machine, combining the current situation of China power supply, should be strictly in line with the development of laser cutting machine using a voltage regulator, and energy-saving products developed specifically for stable AC voltage. When the power supply voltage fluctuation of distribution network or load changes, can automatically ensure the stability of output voltage. Must have large capacity, high efficiency, wide voltage range, no additional waveform distortion and phase shift, strain time is fast, stable characteristics. With short circuit, fault alarm etc. perfect protection function, at the same time the volume as much as possible, compact, easy to use.