Abstract: A charging method includes obtaining, by a charging device, a working status of a sensitive component in a terminal device, where the sensitive component interferes with a process in which the charging device charges the terminal device at a sensitive frequency, and the sensitive frequency is within a range of a charging frequency band of the charging device, determining, by the charging device, a safe charging parameter when the working status is an enabled state, where the safe charging parameter includes at least one of a safe charging frequency, a safe charging current, or a safe charging voltage, and charging, by the charging device, the terminal device using the safe charging parameter, where the sensitive component operates in a normal state when the wireless charging device charges the terminal device using the safe charging parameter.

Abstract: A mobile terminal, including a clock generator, a first frequency conversion circuit, a first module, a second frequency conversion circuit, and a second module. The first frequency conversion circuit performs frequency conversion on a clock signal generated by the clock generator, to obtain a first clock signal, and outputs the first clock signal to the first module. The second frequency conversion circuit performs frequency conversion on the clock signal generated by the clock generator, to obtain a second clock signal, and outputs the second clock signal to the second module. The mobile terminal has an improved anti-electromagnetic interference capability.

Abstract: The present invention provides a method for designing USB floating with low electromagnetic interference, especially in a scenario in which a distance between a pin and a metal housing of a USB interface of a terminal device is increasingly small. A first plug and a second plug are connected by using a connection cable having a first shield layer and a second shield layer. The first shield layer and the second shield layer overlap and there is no electrical connection between the first shield layer and the second shield layer. One end of the first shield layer is connected to a metal housing of the first plug, and the other end is suspended. One end of the second shield layer is connected to a metal housing of the second plug, and the other end is suspended.

Abstract: A mobile terminal, including a clock generator, a first frequency conversion circuit, a first module, a second frequency conversion circuit, and a second module. The first frequency conversion circuit performs frequency conversion on a clock signal generated by the clock generator, to obtain a first clock signal, and outputs the first clock signal to the first module. The second frequency conversion circuit performs frequency conversion on the clock signal generated by the clock generator, to obtain a second clock signal, and outputs the second clock signal to the second module. The mobile terminal has an improved anti-electromagnetic interference capability.

Abstract: The present invention provides a method for designing USB floating with low electromagnetic interference, especially in a scenario in which a distance between a pin and a metal housing of a USB interface of a terminal device is increasingly small. A first plug and a second plug are connected by using a connection cable having a first shield layer and a second shield layer. The first shield layer and the second shield layer overlap and there is no electrical connection between the first shield layer and the second shield layer. One end of the first shield layer is connected to a metal housing of the first plug, and the other end is suspended. One end of the second shield layer is connected to a metal housing of the second plug, and the other end is suspended.

Abstract: A charging method includes obtaining, by a charging device, a working status of a sensitive component in a terminal device, where the sensitive component interferes with a process in which the charging device charges the terminal device at a sensitive frequency, and the sensitive frequency is within a range of a charging frequency band of the charging device, determining, by the charging device, a safe charging parameter when the working status is an enabled state, where the safe charging parameter includes at least one of a safe charging frequency, a safe charging current, or a safe charging voltage, and charging, by the charging device, the terminal device using the safe charging parameter, where the sensitive component operates in a normal state when the wireless charging device charges the terminal device using the safe charging parameter.

Abstract: A rotatory device (1) for energy conversion between electrical energy and mechanical energy includes an end cap (20) to which electric conduction and commutation components (30) are attached. The end cap (20) is electrically insulating and has a flange mating to an electric conductive housing (10) of the rotatory device (1). An unpackaged capacitor (40) is positioned between the housing (10) and the flange (20) without occupying other space inside the housing (10) of rotatory device (1). The unpackaged capacitor (40) is electrically coupled to the electric conduction and commutation component and grounded to the housing (10) of the rotatory device (1).

Abstract: A DC electric motor (10) comprises a rotor (30) rotably attached to a stator (20). The rotor (30) comprises an output shaft (31) and a rotor core (33), and a plurality of winding coils (35) wound on the rotor core (33) and electrically connected to a commutator (34) on the output shaft (31). An insulating sleeve (32) is disposed between the output shaft (31) and rotor core (33), forming a capacitor between the output shaft (31) and rotor core (33), thereby reducing the EMI caused by the fluctuating current in the winding coils (35).

Abstract: An apparatus includes multiple brushes (30, 30B, 30A, 30a, 30b) and a commutator (10) that has multiple commutator plates (12, 12A, 12B, 13B) to contact the multiple brushes for commutation in order to convert electrical energy into mechanical energy or vice versa. A brush may include an EMI suppression mechanism (30, 38A, 38B) to reduce random electromagnetic interferences or a filter circuitry (400B) to reduce the overall level of electromagnetic interferences. An EMI suppression mechanism may include a specially designed brush that leverages dielectric properties or mechanical properties of the brush to reduce electromagnetic interferences. An EMI suppression filter circuitry may include an all-capacitor filter circuitry that does not include beads or chokes.

Abstract: A rotatory device (1) for energy conversion between electrical energy and mechanical energy includes an end cap (20) to which electric conduction and commutation components (30) are attached. The end cap (20) is electrically insulating and has a flange mating to an electric conductive housing (10) of the rotatory device (1). An unpackaged capacitor (40) is positioned between the housing (10) and the flange (20) without occupying other space inside the housing (10) of rotatory device (1). The unpackaged capacitor (40) is electrically coupled to the electric conduction and commutation component and grounded to the housing (10) of the rotatory device (1).