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Efficient high-current-adjustment-rate non-isolated switch power source

A technology of switching power supply and switching power supply circuit, which is applied in the direction of high-efficiency power electronic conversion, AC power input conversion to DC power output, electrical components, etc. It can solve the problems of low power factor and output current adjustment rate, which are not ideal, and achieve cost Effects of reduction, calorific value reduction, and volume reduction

Inactive Publication Date: 2016-04-20
张光阳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patentee has applied for similar patents (ZL201420732224.7, ZL201220391624.7), but it is not ideal, especially the power factor and output current adjustment rate are much lower than this patent

Method used

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  • Efficient high-current-adjustment-rate non-isolated switch power source
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  • Efficient high-current-adjustment-rate non-isolated switch power source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: A non-isolated switching power supply with high efficiency and high current regulation

[0025] Such as figure 1 Shown: a non-isolated switching power supply with high efficiency and high current adjustment rate, including rectification and filtering circuit, switching power supply circuit, inductive energy storage recovery circuit and output constant current circuit; where:

[0026] A non-isolated switching power supply with high efficiency and high current regulation (see figure 1 ), including rectification and filtering circuit, switching power supply circuit, inductive energy storage recovery circuit and output constant current circuit; where:

[0027] The rectifier filter circuit is composed of rectifier bridge Br1 and capacitor C2; wherein, the two input terminals of rectifier bridge Br1 are connected to 220 volts AC mains, and one end of its output is grounded and the other end outputs voltage V+. A filter capacitor C2 is connected between the line V+ ...

Embodiment 2

[0032] Embodiment 2: Non-isolated switching power supply with high efficiency and high current regulation rate with constant current source as the load of FET gate electrode circuit

[0033] Such as figure 2 As shown, the load resistor R5 in the gate circuit of the field effect transistor F8 can be replaced by a constant current source circuit composed of a resistor R17, a Zener diode D18, a transistor T19 and a resistor R20, wherein the collector of the transistor T19 is connected to the V1 voltage Line, its emitter is connected to the output voltage line V+ of the rectifier circuit through resistor R17, its base is grounded to GND through resistor R20 one way, and the other way of the base is connected to the rectifier circuit through the anode of Zener diode D17 to its cathode Output voltage line V+. This will improve the output current regulation rate of the power supply.

[0034] The circuit of this embodiment is a bit more complicated, but the current adjustment rate ...

Embodiment 3

[0035] Embodiment 3: A non-isolated switching power supply with high efficiency and high current adjustment rate with a capacitor on the input arm of the rectifier bridge stack

[0036] Such as image 3 As shown, not only the resistor R5 connected to the output voltage line V+ in the gate circuit of the field effect transistor F8 is replaced by a constant current source composed of a resistor R17, a Zener diode D18, a transistor T19 and a resistor R20, but also in the bridge stack Br1 A capacitor C21 for lowering the input voltage of the bridge stack is connected in series between one input arm and the 220V mains. This can not only increase the output current adjustment rate of the power supply to 5 / 100,000, but also make the output voltage of the power supply easy to drop to a very low level, and even the output short circuit will not damage the circuit, so as to meet the requirements of high technical requirements and low power supply voltage. Requirements for loads such as...

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Abstract

The invention provides an efficient high-current-adjustment-rate non-isolated switch power source for users. The power-source efficiency is as high as 98% and is much higher than the power-source efficiency of 90% of a switch power source at present, and particularly, the adjustment rate of an output current of the power source is 5 / 100,000 per V and is much higher than the level of a same-type power source at present. The power source is small in size, the number of use elements is small and even is only fifteen, cooling fins can be avoided, and therefore cost is low. The output power can be 150 watt, the highest output voltage can be 300 V, and the lowest output voltage can be 0 V; in other words, a short circuit can be allowed; the power source further has the potential dimming function and the potential enabling function. If the power source is used for an LED lamp, the technical problems that as for a driving power source of the LED lamp at present, energy consumption is large, the power-source efficiency is not high enough, the cooling fins need to be used, stability is poor, and damage is prone to occurrence are solved.

Description

technical field [0001] The invention relates to a non-isolated switching power supply device with high efficiency and high current adjustment rate, which has particularly high efficiency and good current stabilization effect, can be used as a power supply for various electrical appliances, and is especially suitable as a driving power supply for LED lamps. Background technique [0002] The most widely used switching power supply is an isolated switching power supply, and its efficiency is generally between 80-90%, which means serious heat generation, a lot of wasted energy, and a heavy heat dissipation burden; and the volume is also large. At present, the integrated non-isolated switching power supply HA22004PB (belonging to the HA220XXPB series) is available on the market (available on the Internet), and is considered to be the best power supply of the same type. Its optimal output voltage range is 150-180 volts. The current outside the range changes rapidly with the voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M1/42
CPCH02M1/4216H02M7/219H05B47/10H02M1/0048Y02B70/10
Inventor 张光阳
Owner 张光阳