Motor controller and its sampling signal processing method
A motor controller and signal technology, applied in the field of power electronics, can solve the problems of random hardware failure and inability to judge the output voltage sampling result, etc.
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example 1
[0045] Example 1: The main circuit of the sampling unit includes a voltage dividing resistor network, and a low-pass filter connected to the output end of the voltage dividing resistor network, such as figure 2 shown. which is, figure 2 The output terminal of the low-pass filter is used as the preset node. Among them, the low-pass filter can be realized by the analog circuit of the operational amplifier, and the voltage dividing resistor network can be realized by connecting the resistors in series.
[0046] exist figure 2 On the basis of , the two branches in the same sampling unit can be any two of the following four branches ( figure 2 Only the following first branch and second branch are used, and the first branch adopts an isolated op amp module as an example):
[0047] The first branch includes: an operational amplifier module connected to the output end of the low-pass filter, and an analog-to-digital converter connected to the output end of the operational ampl...
example 2
[0052] Example 2: The main circuit of the sampling unit includes a voltage dividing resistor network, a low-pass filter connected to the output end of the voltage dividing resistor network, and an isolated analog-to-digital converter connected to the output end of the low-pass filter ,like Figure 4 shown. which is, Figure 4 The output terminal of the isolated analog-to-digital converter is used as the preset node.
[0053] exist Figure 4 On the basis of , a branch in the sampling unit includes: an SPI (SerialPeripheralInterface, serial peripheral interface) driver connected to the output end of the isolated analog-to-digital converter;
[0054] Another branch in the same sampling unit includes: a DMA (Direct Memory Access, direct memory access) generator connected to the output end of the isolated analog-to-digital converter.
[0055] 2) About the algorithm of the microprocessor 200
[0056] The microprocessor 200 is used to calculate the deviation between the output s...
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