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Loop compensation circuit and compensation method for voltage-controlled isolation type DC/DC converter

A technology of loop compensation and voltage control, applied in the control/regulation system, adjusting electric variables, converting DC power input to DC power output, etc., can solve the problem of limiting the dynamic response and stability of the power supply, affecting the bandwidth and phase margin of the power supply system Degree and other issues, to achieve the effect of compensating the influence of loop gain

Pending Publication Date: 2019-02-12
NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional loop compensation single-circuit and isolation compensation circuits input the voltage control signal into the controller, and the parasitic capacitance outside the controller will lead to a lower parasitic pole, about 10kHz, which will seriously affect the bandwidth and phase margin of the power system degree, thereby limiting the dynamic response and stability of the power supply

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  • Loop compensation circuit and compensation method for voltage-controlled isolation type DC/DC converter
  • Loop compensation circuit and compensation method for voltage-controlled isolation type DC/DC converter
  • Loop compensation circuit and compensation method for voltage-controlled isolation type DC/DC converter

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings:

[0022] like figure 1 As shown, the loop compensation circuit of the voltage control isolated DC / DC converter of this embodiment includes an isolation compensation unit circuit 12 and a loop compensation unit circuit 11; the loop compensation unit circuit 11 is used to compensate the voltage control isolation type The double pole and high-frequency zero point generated by the main power circuit link, and improve the static gain; the isolation compensation unit circuit 12 is used to isolate the primary and secondary circuits, and at the same time compensate the pole caused by the parasitic parameters of the optocoupler isolator, reducing its impact on adverse effects on the power control loop.

[0023] Loop compensation unit circuit 11 is composed of operational amplifier N1, resistors R1, R2, R3 and capacitors C1, C2, C3 to form a compensation network, one end of resis...

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PUM

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Abstract

The invention relates to a loop compensation circuit and compensation method for a voltage-controlled isolation type DC / DC converter. The loop compensation circuit comprises an isolation compensationunit circuit and a loop compensation unit circuit, wherein the loop compensation unit circuit is used for compensating double poles and a high frequency zero which are generated by a voltage-controlled isolation type main power circuit procedure, and increasing a static gain; and the isolation compensation unit circuit is used for isolating primary and secondary circuits and compensating poles caused by parasitic parameters of a photon coupled isolator to reduce adverse effects caused by the poles on a power control loop. The loop compensation circuit disclosed by the invention can allow a control circuit to realize primary and secondary electrical performance isolation, and also can compensate a main power circuit of the voltage-controlled type DC / DC converter in a PWM (Pulse Width Modulation) mode and compensate the influence caused by the high frequency poles generated by an isolation photocoupler on the loop gain.

Description

technical field [0001] The invention relates to a compensation circuit, in particular to a loop compensation circuit and a compensation method of a voltage control isolated DC / DC converter. Background technique [0002] Conventional loop compensation single-circuit and isolation compensation circuits input the voltage control signal into the controller, and the parasitic capacitance outside the controller will lead to a lower parasitic pole, about 10kHz, which will seriously affect the bandwidth and phase margin of the power system degree, thereby limiting the dynamic response and stability of the power supply. Contents of the invention [0003] The purpose of the present invention is to provide a loop compensation circuit and compensation method of a voltage-controlled isolated DC / DC converter, which can not only enable the control circuit to achieve primary and secondary electrical performance isolation, but also compensate for DC / DC conditions such as voltage-controlled...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33569Y02B70/10
Inventor 邹扬袁柱六宋敏燕梁寰宇郑东童魁吴小波汤瑞刘心漪
Owner NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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