Magnetic amplifier-based voltage-superposed dual-path voltage stabilization switch power supply

A technology of switching power supply and magnetic amplifier, which is applied in the direction of instruments, electrical components, and adjustment of electric variables, etc. It can solve the problems of non-moving load in the auxiliary road, large loss of light magnetic amplifier, and large loss of magnetic amplifier, and solve the problem of cross adjustment rate Effect

Pending Publication Date: 2019-07-05
BEIJING CHENGLI POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first one: the main road has a feedback loop, but the auxiliary road does not have a feedback loop, and the output follows the main road. This has the disadvantage that the output voltage of the auxiliary road will fluctuate with the change of the output power of the main road, even far away. Exceeding the accuracy requirement of ±1%; when the output power of the main circuit is small, the auxiliary circuit may not carry the load
[0004] The second type: the main road has a feedback loop, but the auxiliary road does not have a feedback loop, and the magnetic amplifier is used to adjust the pulse width to stabilize the output. This has the disadvantage that when the output power of the main road is small, the auxiliary road will not be able to carry the load.
[0005] The third type: the front stage adopts a fixed large-scale output, and the two rear poles use the magnetic amplifier to adjust the pulse width to stabilize the voltage separately. The disadvantage of this is: when the two outputs are light-loaded, the magnetic amplifier returns to magnetism The current is large, resulting in large losses in the magnetic amplifier
In other words, the lighter the load, the greater the loss of the magnetic amplifier

Method used

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  • Magnetic amplifier-based voltage-superposed dual-path voltage stabilization switch power supply
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  • Magnetic amplifier-based voltage-superposed dual-path voltage stabilization switch power supply

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specific Embodiment approach 1

[0028] A dual-channel regulated switching power supply based on the voltage superposition of the magnetic amplifier of the present application, such as figure 1 , 2 As shown, it includes a main power conversion circuit, a first output circuit, a second output circuit, and a magnetic control circuit. The first output circuit includes a rectification and filtering 1 circuit and a voltage sampling feedback circuit 1. The output of the rectification and filtering 1 circuit is connected to the voltage sampling and feedback circuit. 1; the second output circuit includes a rectification filter 2 circuit, a voltage sampling feedback circuit 2, the output of the rectification filter 2 circuit is connected to the input of the voltage sampling feedback circuit 2; the main power conversion circuit is connected with the first and second output circuits, and the main The output of the main circuit is generated by the rectification and filtering 1 circuit, that is, the electrical output betw...

specific Embodiment approach 2

[0034] A dual-channel regulated switching power supply based on the voltage superposition of the magnetic amplifier of the present application, such as image 3 As shown, the magnetic control circuit includes a control circuit and a magnetic amplifier L1, the input of the control circuit is connected to the output of the voltage sampling feedback circuit 2, and the output of the control circuit is connected to the return input of the magnetic amplifier.

[0035] Specifically, the control circuit includes a PNP transistor, the base of the PNP transistor is connected to the output of the second voltage sampling feedback circuit 2, its emitter is connected to the positive output of the rectification filter circuit 2 through a resistor R2, and its collector is connected to the diode D1 through a resistor R4. The positive pole is connected, and the negative pole of the diode D1 is connected to the magnetic return input of the magnetic amplifier L1.

[0036] The input of the magneti...

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Abstract

The invention discloses a magnetic amplifier-based voltage-superposed dual-path voltage stabilization switch power supply. The magnetic amplifier-based voltage-superposed dual-path voltage stabilization switch power supply comprises a main power conversion circuit, a first output circuit and a second output circuit, wherein a main circuit output is generated by the first output circuit, an auxiliary circuit output is generated in a superposition way by the first output circuit and the second output circuit, the first output circuit employs a PWM control mode to stabilize voltage, the second output circuit employs a magnetic amplifier to stabilize voltage, the stability of the main circuit output and the auxiliary circuit output, and the auxiliary circuit also can normally output under thecondition that the main circuit is not provided with a load.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a dual-channel voltage-stabilizing switching power supply based on voltage superposition of a magnetic amplifier. Background technique [0002] At present, there are three main types of switching power supplies with dual outputs controlled by a single-channel PWM pulse width regulator: [0003] The first one: the main road has a feedback loop, but the auxiliary road does not have a feedback loop, and the output follows the main road. This has the disadvantage that the output voltage of the auxiliary road will fluctuate with the change of the output power of the main road, even far away. The accuracy requirement of ±1% is exceeded; when the output power of the main circuit is small, the auxiliary circuit may not carry the load. [0004] The second type: the main road has a feedback loop, but the auxiliary road does not have a feedback loop, and the magnetic ampli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/16
CPCH02M3/33507H02M1/16
Inventor 王大本张娜
Owner BEIJING CHENGLI POWER SUPPLY
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