Motor controller output overcurrent fault detection and processing device and motor controller
A technology for motor controller and fault detection, applied in the direction of measuring device, measuring current/voltage, general control system, etc., can solve the problems of miniaturization of motor controller, unfavorable convenient layout, large number of comparators, etc., to reduce comparison The effect of reducing the number of devices, reducing the cost of the circuit, and reducing the difficulty of layout
Pending Publication Date: 2021-07-13
FUJIAN WANRUN NEW ENERGY TECH
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Problems solved by technology
[0005] To this end, it is necessary to provide a motor controller output overcurrent fault detection and processing device, which solves the problem that the existing motor controller overcurrent fault detection circuit requires a large number of comparators, high cost, and is not conducive to convenient layout and inconvenience. Facilitate miniaturization of motor controllers
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[0044] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.
[0045] see Figure 2-3 , this embodiment provides a motor controller output overcurrent fault detection and processing device, including a signal rectification circuit 110, a comparison circuit 120 and a processing unit 130;
[0046] The signal rectification circuit 110 includes a U-phase input terminal, a V-phase input terminal, a W-phase input terminal, a maximum value output terminal and a minimum value output terminal, and the U-phase input terminal of the signal rectification circuit 110 is connected to the U phase input terminal of the motor controller. Phase current sampling signal end, the V-phase input end of the signal rectification circuit 110 is connected to the V-phase current sampling signal end of the motor controller, ...
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The invention relates to a motor controller output overcurrent fault detection and processing device and a motor controller. The device comprises a signal rectification circuit, a comparison circuit and a processing unit. The signal rectification circuit is used for rectifying three-phase output sampling signals of the motor controller and outputting a maximum value and a minimum value in the three-phase sampling signals; the comparison circuit is used for comparing the maximum value and the minimum value of the three-phase sampling signals output by the signal rectification circuit with reference voltage and outputting detection signals; and the processing unit is used for judging whether the motor controller has an overcurrent fault or not according to the detection signal output by the comparison circuit, and carrying out corresponding processing. Whether the motor controller has an overcurrent fault or not is judged only by comparing the maximum value and the minimum value output by rectifying the three-phase current sampling signal of the motor controller, so that the number of comparators in the comparison circuit can be reduced, the circuit cost is reduced, the area of a circuit board is reduced, and the arrangement difficulty is reduced.
Description
technical field [0001] The invention relates to the technical field of motor controllers, in particular to a motor controller output overcurrent fault detection and processing device. Background technique [0002] In the motor controller, in order to prevent the motor controller and the motor from being damaged by the excessive output current of the motor controller, it is necessary to detect and judge whether the output current of the motor controller has an overcurrent fault, and perform corresponding processing. [0003] Such as figure 1 The schematic block diagram of the overcurrent fault detection circuit of the motor controller is shown. At present, for the overcurrent fault detection of the motor controller, the three-phase output current sampling signal of the motor controller is compared with the reference voltage to detect whether an overcurrent occurs. Fault, as long as the current sampling signal of any phase of the three-phase output current exceeds the referen...
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IPC IPC(8): G05B23/02G01R19/165
CPCG01R19/16571G05B23/0208
Inventor 陈武雷学国徐春芳
Owner FUJIAN WANRUN NEW ENERGY TECH