DC motor protection method and device, and electronic equipment
A DC motor, direct technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of poor stability and poor protection effect, and achieve the effect of improving stability and protection effect
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Embodiment 1
[0057] like figure 1 As shown, the embodiment of the present invention provides a DC motor protection method, which is applied in the field of DC motor protection to realize the protection of the DC motor, and is especially beneficial to timely discover the static short circuit of the DC motor, thereby protecting the DC motor.
[0058] Specifically, the method is executed by a controller (including a PWM rectifier for outputting a PWM waveform) electrically connected to the DC motor, including:
[0059] Step S101, detecting the status information of the DC motor; the above status information includes any one of static and dynamic;
[0060] The static state here refers to the state in which the DC motor is in the starting state and is started for the first time; the dynamic state is the state in which the DC motor is in the starting state and not started for the first time.
[0061] The controller detects the state information of the DC motor every preset time (sampling cycle)...
Embodiment 2
[0108] Considering that when the DC motor is dynamic, the duty ratio is abnormal (for example, unstable), which may have adverse effects on the operation of the DC motor. like image 3 As shown, on the basis of the first embodiment, the embodiment of the present invention provides another DC motor protection method, which is different from the first embodiment in that the method also includes:
[0109] Step S301, judging whether the duty cycle at the current moment is consistent with the first duty cycle;
[0110] Wherein, the first duty ratio is the duty ratio when the DC motor is in normal operation (the duty ratio when the DC motor can run stably can be obtained artificially based on experience); in other words, the first duty ratio is due to The duty ratio output by the PWM rectifier to maintain the normal operation of the DC motor is a known or empirical value.
[0111] Specifically, whether the duty ratio at the current moment is consistent with the first duty ratio ca...
Embodiment 3
[0118] Figure 4 It shows a schematic diagram of a protection device for a DC motor provided by an embodiment of the present invention. The protection device for a DC motor includes: a state detection module 400, an output module 500, and a short circuit detection module 600; wherein,
[0119] The state detection module 400 is used to detect the state information of the DC motor, and the state information includes any one of static and dynamic;
[0120] The output module 500 is used to directly output the duty cycle at the current moment when the state information of the DC motor is dynamic;
[0121] The short-circuit detection module 600 is configured to perform static short-circuit detection of the DC motor when the state information of the DC motor is static.
[0122] Further, the device also includes:
[0123] Judgment and adjustment module 700, used to judge whether the duty ratio of the current moment matches the first duty ratio; the first duty ratio is the duty ratio...
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