Title:
CONTROL METHOD FOR IMPROVING OUTPUT PRECISION OF SWITCHING POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2020/015391
Kind Code:
A1
Abstract:
A control method for improving the output precision of a switching power supply, the control method being based on a control system composed of a sampling module, a precision control module, an error calculation module, a PID module and a PWM module, wherein the control system is connected to a controlled switching power supply to form a closed loop. Mode switching is controlled by means of detecting an output voltage, wherein when the output voltage exceeds an upper limit voltage, a circuit is enabled to enter a DCM mode by means of mode switching, thereby reducing input energy and stabilizing the output voltage within an adjustment range; and when the output voltage is lower than a lower limit voltage, the circuit is enabled to enter a CCM mode by means of mode switching, thereby increasing the input energy and quickly restoring the output voltage to the adjustment range. During normal adjustment, a change in the output voltage is limited between the upper limit voltage and the lower limit voltage, such that a voltage output ripple is reduced, and the precision is improved.
Inventors:
XU SHEN (CN)
YU LIMIN (CN)
TAO RONGRONG (CN)
CHEN WEIYU (CN)
SUN WEIFENG (CN)
LU SHENGLI (CN)
SHI LONGXING (CN)
YU LIMIN (CN)
TAO RONGRONG (CN)
CHEN WEIYU (CN)
SUN WEIFENG (CN)
LU SHENGLI (CN)
SHI LONGXING (CN)
Application Number:
PCT/CN2019/081814
Publication Date:
January 23, 2020
Filing Date:
April 08, 2019
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
H02M3/335; H02M1/08; H02M1/15
Foreign References:
| CN109004840A | 2018-12-14 | |||
| CN105071641A | 2015-11-18 | |||
| CN107154723A | 2017-09-12 | |||
| CN107346943A | 2017-11-14 |
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (CN)
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