A tri-surplus current and short-circuit protection control circuit
A control circuit and current protection technology, which is applied in the field of power electronics, can solve problems such as difficult to ensure accuracy, reduce the overall efficiency of the power supply, and unfavorable miniaturization design, so as to achieve safe and reliable work, fast and accurate protection of the standby state, and avoid devastating damage. Effect
Inactive Publication Date: 2018-12-21
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
View PDF2 Cites 9 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] This current-limiting resistor comparator over-current protection method is simple and effective, but there are many limitations and deficiencies
First: In the high-power application of comprehensive energy projects, the power of the sampling resistor is large, and sufficient derating reliability design must be left, resulting in a la
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
[0035] The present invention will be described below in conjunction with the accompanying drawings.
[0036] Such as figure 1 As shown, the present invention proposes a three-redundant overcurrent protection control circuit, including a power control chip self-detection control unit, a power chip master control unit, an input current detection control unit, and an output current detection control unit. It solves the problems of large package of current protection circuit, low overall power supply efficiency and poor reliability in the past.
[0037] The power control chip collects the current signal on the input side from the detection control unit, and compares it with the preset threshold of the power chip master control unit to determine whether the input circuit is in an over-current or short-circuit state. If the circuit is over-current or short-circuited, the chip enters hiccup protection mode; the input current detection control circuit collects the current sampling vo...
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
The invention relates to a tri-surplus current protection control circuit, comprising a power supply control chip self-detection control unit, a power supply chip master control unit, an input currentdetection control unit and an output current detection control unit. A current detection signal on the input side is directly input to the power chip master control unit, and the power chip master control unit compares and judges whether the overcurrent occurs, thus ensuring a rapid response to the overcurrent; The other input current detection signal is compared and judged by the input current detection control unit, The over-current protection is made to last longer by the hardware circuit, so as to deal with the circuit overheating caused by the power conversion of the output circuit repeatedly turned on by the master control unit of the power supply chip when the over-current is too large, such as the short circuit state. The control circuits of over-current and short-circuit protection ensure the stable operation of the whole system, and do not cause the large-scale failure of the system, thus realizing the high reliability requirements for the over-current protection state of the power conversion system.
Description
technical field [0001] The invention relates to a three-overcurrent and short-circuit protection control circuit, which is suitable for over-current and short-circuit protection circuits within a wide voltage input and large current range of power circuits such as switching power supplies, frequency converters, and drivers, and belongs to the technical field of power electronics. Background technique [0002] With the development of power electronics technology, the integrated energy control system has general requirements such as miniaturization, high energy density, and high reliability. However, in the conversion design of the power module, the power density is high, the output current is large, and the heat generation is concentrated. When the output over-current and short-circuit state occurs instantly, the input-side switching tube and the output-side rectifier tube will work in a serious over-power state. It is easy to burn the power tube in the working environment of...
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 IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 王令岩徐祯祥赵絮李春宇徐秀华
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS