An over-temperature protection circuit and motor controller
An over-temperature protection circuit and circuit technology, applied in the electronic field, can solve problems such as increased cost, system complexity, and system reliability issues
Active Publication Date: 2020-06-26
FUJIAN RAYNEN TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the high voltage on the side of the intelligent power module and the low voltage on the side of the micro control unit, the direct connection between the high voltage reference terminal and the low voltage reference terminal will bring about system reliability problems. If isolation devices are used, the linear isolation devices used will increase. Additional cost and system complexity
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
[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0014] In some specific applications, the limit current should be set relatively small, and there will be a momentary high current when the power is turned on, and the intelligent power module integrates an over-current processing circuit. When the intelligent power module detects an over-current, it will automatically The current will be limited to the set value through internal processing to prevent the current from exceeding the limit value, so over-current ...
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 discloses an over-temperature protection circuit and a motor controller. The over-temperature protection circuit comprises an anti-interference circuit, a comparison control circuit anda processing circuit, wherein the anti-interference circuit is used for preventing voltage outputted by an intelligent power module when overcurrent occurs from triggering over-temperature protection,providing first preset voltage, comparing the first preset voltage with the output voltage of the intelligent power module and outputting first comparison voltage to the processing circuit; the comparison control circuit is used for providing second preset voltage, comparing the second preset voltage with the output voltage of the intelligent power module and outputting second comparison voltageto the processing circuit, and the processing circuit is used for outputting a corresponding signal to a micro-control unit according to the first comparison voltage and the second comparison voltageso as to enable the micro-control unit to control the intelligent power module to be in non-working state when the intelligent power module is judged to be in an over-temperature state. According to the above mode, whether the intelligent power module is in an over-temperature state or not can be monitored, thereby improving the safety, and effectively preventing the interference of overcurrent tothe over-temperature protection circuit.
Description
technical field [0001] The present application relates to the field of electronic technology, in particular to an over-temperature protection circuit and a motor controller. Background technique [0002] The intelligent power module (IPM, Intelligent Power Module) not only integrates the power switching device and the drive circuit, but also integrates fault detection circuits such as over-current and over-temperature, and can send feedback signals to the processor. [0003] The inventors of the present application have found in long-term research and development, such as figure 1 As shown, the traditional method of monitoring the internal temperature of the intelligent power module is through the external pull-up resistor R1. When the temperature of the intelligent power module changes, the resistance value of the thermistor R2 also changes accordingly, and the voltage is divided by the external pull-up resistor R1. It is then sent to an analog-to-digital converter (ADC, A...
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): H02K11/25H02H7/085
Inventor 陈仁贵
Owner FUJIAN RAYNEN TECH