Inductive load current detecting method
An inductive load and current detection technology, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as difficult design, achieve good real-time performance and measurement accuracy, easy to implement, and simple steps
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[0030] The invention discloses an inductive load current detection method. By using a rectifier circuit composed of precision resistors and capacitors and matching certain filtering processing, the actual current value after the superimposition of the original current passing through the inductive load and the induced current can be objective and comprehensive. The insinuation into a voltage value is convenient for the analog acquisition unit of the MCU to perform signal processing.
[0031] The rectified analog signal has a certain collection value, but due to the influence of the inductive load's own induced electromotive force when the frequency conversion AC signal is applied, the signal fluctuates. Moreover, since the signal is a conversion process of the original current, its signal quantity cannot be linearly corresponded to the actual current value. The signal captured by the MCU first needs to be filtered to filter out false values in the analog signal. Then, the i...
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