Voltage-adjustable multi-channel output power and its method for adjusting the output voltage

A multi-channel output and output voltage technology, which is applied in the conversion equipment that converts irreversible AC power input into DC power output, and can be converted into DC power without intermediate conversion, which can solve the problem of increasing the volume of power supply and PCB area and increasing the output cost. , power efficiency reduction and other problems, to achieve the effect of improving electromagnetic compatibility characteristics, improving power supply efficiency, and changing winding costs

Active Publication Date: 2007-09-12
VERTIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The output cost of this channel is greatly increased, and the cost performance is extremely poor;
[0005] 2. The inevitable loss caused by the secondary voltage regulation reduces the power supply efficiency;
[0006] 3. The heat loss of the secondary voltage regulator requires a radiator or other forms of heat dissipation area to dissipate heat. At the same time, the heat loss will inevitably increase the thermal stress of the surrounding devices and reduce the reliability;
[0007] 4. The secondary voltage regulator circuit will increase the size of the power supply and PCB area, which is very unfavorable for the miniaturization of the current power supply;
[0008] 5. As the number of transformer turns increases, the difficulty and cost of the winding process will increase
[0009] 6. It is impossible to perform voltage compensation for the output circuit with low output voltage

Method used

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  • Voltage-adjustable multi-channel output power and its method for adjusting the output voltage
  • Voltage-adjustable multi-channel output power and its method for adjusting the output voltage
  • Voltage-adjustable multi-channel output power and its method for adjusting the output voltage

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specific Embodiment 1

[0042] Specific embodiment 1, in the known technology, the power supply circuit of any topology generally directly connects diode rectification and filter circuit after the output winding of transformer, especially the topology of single-ended flyback type, its output path with feedback (for the sake of convenience , referred to as the main road, the same below.) Adding a small inductance before the filter capacitor rectifier diode hand filter capacitor will cause output instability, and adding inductance to other output circuits will also cause large changes in output, so the industry is single-ended reverse The output inductance cannot be added before filtering in the power output circuit of the excitation topology, but on the other hand, there must be leakage inductance in each winding of the transformer. If the leakage inductance of an output winding is appropriately changed, the output stability will be affected. It is not big; it is difficult to change the leakage inducta...

specific Embodiment 2

[0062] Specific embodiment two, different from the specific embodiment one is that the position of voltage regulation inductance connection is different, as shown in Figure 7,8, in Fig. 7, voltage regulation inductance Lo (being L2 in Fig. 4) is connected in series in auxiliary circuit output Between the second terminal Tb of the winding 41 and the negative pole of the filter capacitor C2 , in FIG. 8 , the voltage regulating inductor Lo is connected in series between the negative pole of the rectifier diode D2 and the positive pole of the filter capacitor C2 .

specific Embodiment 3

[0063] Specific embodiment 3, as shown in FIG. 9 , differs from specific embodiments 1 and 2 in that the energy hysteresis unit is a voltage regulating capacitor Co, and the voltage regulating capacitor Co is connected in parallel to the two output terminals of the output transformer winding 41 of the auxiliary circuit.

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Abstract

The invention relates to a multi-output power supply, disclosing an adjustable-voltage multi-output power supply, comprising input circuit, transformer and output circuit connected in sequence, where the output circuit comprises main output and at least one auxiliary output, and the auxiliary output comprises auxiliary output transformer winding, rectifier unit and filter unit connected in sequence and an energy delay unit is connected between the transformer winding and filter unit of one or more auxiliary outputs with higher output voltage. Thus, it reduces the output voltage of an auxiliary output by reducing the output energy of the auxiliary output so as to achieve the voltage adjusting purpose.

Description

【Technical field】 [0001] The invention relates to an adjustable voltage multi-channel output power supply and a method for adjusting the output voltage. 【Background technique】 [0002] At present, in the multi-channel (that is, two or more) output power supplies used in the industry, due to the rounding of the number of transformer turns, the difference in the voltage drop of the output rectifier diode, the winding process of each winding of the transformer and the position of the air gap Due to different effects, the output voltage may be higher or lower than the actual design rating. In particular, the number of turns of the transformer is rounded (for a small number of special-application transformers, it may be possible to take half a turn, but the transformer with half a turn has special requirements for the air gap mode of the magnetic core, the distribution of the winding, or the way of the winding lead-out wire. Increase the winding cost of the transformer.), the sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/04H02M7/06H02M5/12
Inventor 吴连日
Owner VERTIV CORP
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