Power supply and voltage calibration method
A power supply, capacitor technology
Active Publication Date: 2020-02-07
LITE ON ELECTRONICS (GUANGZHOU) LTD +1
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In the past, during the production of power supplies, the actual value of the voltage across the capacitor can be measured with an ammeter on the production line, and then the error can be compensated to complete the calibration, so as to solve the problem that the voltage across the capacitor is not accurate enough.
However, because the voltage across the capacitor cannot be measured directly at the output terminal of the power supply, the power supply must be opened to measure the voltage. This action may not only cause harm to the workers on the production line (because high voltage electric shock), may also cause damage to the power supply, and also waste manufacturing time on the production line
In addition, even if the previous power supply has been calibrated on the production line, the voltage across the capacitor may vary due to other abnormal factors, which again leads to a decrease in performance and reliability
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0056] Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.
[0057] refer to figure 1 , an embodiment of the power supply 9 of the present invention, is suitable for being electrically connected to an AC power source 1 to receive an AC input voltage V s , and includes a rectifier 2, a DC-to-DC boost converter (DC / DC BoostConverter) 4, a capacitor C 1 , a bypass circuit (Bypass Circuit) 7, a resistor R 1 , a switching element 3 , a DC-to-DC step-down converter (DC / DC Step-Down Converter) 5 , and a control unit 6 .
[0058] refer to figure 1 and figure 2 , the rectifier 2 receives the AC input voltage V s , and the AC input voltage V s converted while the output is a DC input voltage V in . In this embodiment, the rectifier 2 is a bridge full-wave rectifier, and the AC input voltage V s (Such as figure 2 Shown) the part whose voltage value is less than zero turns...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A power supply includes a DC-to-DC boost converter, a capacitor, a DC-to-DC buck converter and a control unit to implement a voltage correction method. The control unit respectively samples an input voltage and a converter output voltage when the DC-to-DC boost converter is turned off, and at least calculates a calculated value corresponding to the converter output voltage based on the input voltage, and then according to the calculated value and the converter output voltage determine a correction parameter. When the DC-DC boost converter is turned on, the control unit calculates a correction value according to the calibration parameter and the sampling value of the converter output voltage, and sends the correction value to the DC-DC boost converter for Compensating the output voltage of the DC-to-DC step-up converter keeps the DC output voltage of the DC-to-DC step-down converter constant, thereby improving the reliability of the power supply.
Description
technical field [0001] The invention relates to a calibration method, in particular to a voltage calibration method and a power supply implementing the voltage calibration method. Background technique [0002] Generally speaking, there are differences in the parameters of all components, such as process error, especially the voltage across the capacitor of the power supply unit (PSU), which may not only affect the performance of the power supply unit, but also reduce the power supply product Reliability, and at the same time, it is necessary to reserve more margins in the design to overcome the problem of inaccurate cross-voltage on the capacitor. In the technical field of power supplies, the capacitor is usually called Bulk Capacitor, and the voltage across the capacitor is usually called Bulk Voltage. [0003] In the past, when the power supply is manufactured, the actual value of the voltage across the capacitor can be measured with an ammeter on the production line, and...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12H02M3/10
CPCH02M3/10H02M7/12H02M1/0067H02M7/04H02M1/36H02M3/156H02M1/32H02M1/42H02M3/26
Inventor 刘宇舜王锡恩罗顺弘
Owner LITE ON ELECTRONICS (GUANGZHOU) LTD