Electric dust collector
A vacuum cleaner and electric technology, applied in the direction of vacuum cleaners, AC motor control, electrical components, etc., can solve the problems of high price of thermal fuses, high cost of electric vacuum cleaners, and inability to realize commutator motor protection in the early stage, so as to prevent unnecessary disposal Effect
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[0020] Embodiments of the present invention will be described below with reference to the drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, and is not a characteristic which limits the technical scope of this invention.
[0021] here, figure 1 It is an external view of an electric vacuum cleaner X according to an embodiment of the present invention, figure 2 It is a circuit diagram of a motor drive circuit Y to which a commutator motor 11 provided in an electric vacuum cleaner X according to an embodiment of the present invention is connected, image 3 with Figure 4 It is a figure which shows an example of the measurement result of the electric current value Pd of the commutator motor 11 in electric vacuum cleaner X concerning embodiment of this invention, and its change range Pe, Figure 5 It is a flowchart showing an example of the procedure of the abnormal spark prevention process e...
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