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Forward power circuit of multiple tubes connected in series

A power supply circuit and positive excitation technology, which is applied in the direction of electrical components, electric variable adjustment, output power conversion devices, etc., can solve problems such as inability to use other multi-channel closed-loop control, limited input voltage of the circuit, imperfect protection measures, etc., and achieve saving R&D cost and R&D time, the effect of reducing R&D cost, improving the scope of application and the ability of precise control

Active Publication Date: 2018-06-22
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the current design of forward switching power supply, a single power switch tube is generally used as the bus voltage chopper switch, and the input voltage of the circuit is limited. Different power switches need to be designed according to different requirements each time, which mainly makes the research and development cost high. The research and development cycle becomes longer; at the same time, only a single drive control chip is generally used to complete the closed-loop control of the output voltage, the protection measures are not perfect, and other multi-channel closed-loop control or effective monitoring cannot be performed, the safety is relatively low, and it is inconvenient to use

Method used

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  • Forward power circuit of multiple tubes connected in series

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Embodiment Construction

[0033] The invention provides a multi-tube series forward power supply circuit, which includes a forward multi-tube series circuit, a transformer main circuit, an MCU main control circuit, a drive circuit, a rectification and freewheeling circuit, and a start-up circuit.

[0034] combine figure 1 , the transformer main circuit mainly includes a transformer T1; including an input coil 1,5, a first output coil 9,10 and a second output coil 12,16. According to actual needs, the number of output coils can be increased to provide more outputs.

[0035] The previous stage of the main circuit of the transformer is a rectification and freewheeling circuit. The rectification and filtering freewheeling circuit is used to rectify the output voltage of the transformer and output it after smoothing and filtering. Freewheeling is to continue to provide energy for a period of time; the rectifying freewheeling circuit mainly includes resistor double-body diodes D1, D2, inductor L1, and capac...

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Abstract

The invention relates to a forward power circuit of multiple tubes connected in series. The forward power circuit comprises a forward four-tube series forward circuit, a transformer main circuit, a master control circuit, a driving circuit, a rectification freewheeling circuit and a starting circuit, and wherein forward multi-tube series circuit comprises N MOS tubes. With the adoption of the forward power circuit of multiple tubes connected in series, different voltage class occasions are achieved, a stable voltage can be output by employing the same control circuit, and the application performance of a circuit power supply is improved; and moreover, the circuit is simple and reliable to construct, and the research cost and the research time are reduced. With the adoption of the master control circuit, control on different switch states of the MOS tubes is achieved under different voltage classes, the application range and the accurate control capability of the switch power supply areimproved, closed-loop control of multi-path voltage and current is achieved, and the stability of each output voltage of the switch power supply is improved.

Description

technical field [0001] The invention relates to a forward power supply circuit with multiple tubes connected in series, belonging to the technical field of switching power supplies. Background technique [0002] With the development of power electronics technology, power modules have been widely used in various fields, and switching power supplies have gradually replaced linear power supplies and become mainstream power supplies. Under the action of PWM, the power switch tube of the switching power supply performs the opening and closing actions, and chops the bus voltage into a pulse voltage. The drive control circuit controls the duty cycle of the PWM to ensure the stability of the voltage. In small and medium power DC-DC switching power supplies, the most commonly used circuit topology is flyback switching power supply and forward circuit. In these two circuits, the switching frequency of the circuit is generally greater than 100KHz, and the core part is the design of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36
CPCH02M1/36H02M3/33569
Inventor 李鹏飞郭喜彬远桂方王福德侯军瑞
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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