A motor includes a rotor, a back cover, a housing, and a brush card assembly. The rotor includes a core fixed to a shaft, a coil that magnetizes a core, and a commutator connected to the coil. The back cover includes a back cover bottom surface portion, and a back cover cylindrical portion on an outer periphery of the back cover bottom surface portion to have a cylindrical shape. The brush card assembly includes a brush card bottom surface portion spaced apart from the back cover bottom surface portion in an axial direction through a first gap. The brush card bottom surface holds brushes and includes a nip portion nipped by the back cover and the housing, an outer peripheral wall spaced apart from the back cover cylindrical portion in a radial direction through a second gap, and contact portions contacting the back cover cylindrical portion.

A motor includes a rotor, a back cover, a housing, and a brush card assembly. The rotor includes a core fixed to a shaft, a coil that magnetizes a core, and a commutator connected to the coil. The back cover includes a back cover bottom surface portion, and a back cover cylindrical portion on an outer periphery of the back cover bottom surface portion to have a cylindrical shape. The brush card assembly includes a brush card bottom surface portion spaced apart from the back cover bottom surface portion in an axial direction through a first gap. The brush card bottom surface holds brushes and includes a nip portion nipped by the back cover and the housing, an outer peripheral wall spaced apart from the back cover cylindrical portion in a radial direction through a second gap, and contact portions contacting the back cover cylindrical portion.

A motor and a ground structure of an EMC component and/or EMD component for the motor, wherein the ground structure includes a conductive housing, an insulating cover; the insulating cover is provided with an EMC component and/or EMD component, and an conductive terminal connected to the EMC component and/or EMD component; the ground structure further includes a conductive cover; the first pin of the EMC component and/or ESD component is connected to the conductive terminal; the second pin of the EMC component and/or ESD component is located between the conductive housing and the conductive cover, such that the EMC component and/or ESD component can still be grounded stably even when the insulating cover is deformed because of temperature and vibration.

An inverter device is formed of the two systems of inverters stored inside a cylindrical metal casing. Each inverter converts DC power to three-phase AC power. The inverters are formed of power semiconductor elements, DC bus bars through which DC power supplied to the respective power semiconductor elements, capacitors connected to the DC bus bars, and switches connected between the respective DC bus bars and the DC input terminals. High-impedance switches are disposed in the vicinity of the DC input terminals. Hence, electromagnetic noises generated by switching actions of the power semiconductor elements are circulated within the inverters by way of the capacitors and eventually attenuated.

A brush motor has a housing, an end cap and a brush assembly. The brush assembly includes an brush card, brush cages disposed on the brush card, brushes mounted in the respective brush cages, terminals for connecting with an external power supply, and power supply circuits connecting the terminals to the respective brushes. The brush assembly further includes at least one grounding conductor mounted to the brush card and electrically connected to the power supply circuits. The grounding conductor includes a main portion fixed to the brush card and a tongue extending from the main portion. The tongue includes a bent portion for resilient connection to the end cap or housing.

A brush motor has a housing, an end cap and a brush assembly. The brush assembly includes an brush card, brush cages disposed on the brush card, brushes mounted in the respective brush cages, terminals for connecting with an external power supply, and power supply circuits connecting the terminals to the respective brushes. The brush assembly further includes at least one grounding conductor mounted to the brush card and electrically connected to the power supply circuits. The grounding conductor includes a main portion fixed to the brush card and a tongue extending from the main portion. The tongue includes a bent portion for resilient connection to the end cap or housing.

A brush assembly includes a circuit board, at least two brushes, power connecting terminals for connecting with an external power supply, and a power supply branch circuit connected in series between a corresponding one of the power connecting terminals and a corresponding one of the brushes. The brush assembly further comprises an EMI suppressor connected between the power supply branch circuit and ground. The EMI suppressor is an axial capacitor formed by a conductor core, a cover, and a filling medium. The cover is attached around the conductor core, and the filling medium is filled between the conductor core and the cover. A motor utilizing the brush assembly is also provided.

To simplify assembly and to reduce the susceptibility to faults of a linear drive comprising a transmission housing, an interference-suppressed electric motor which is connected thereto and is accommodated in a motor housing and which by way of a rotor accommodated in the motor housing drives a shaft which is mounted on a rear shaft end in a rear shaft bearing and is mounted on a front shaft end, a commutator for the transmission of current to the rotor, electrical and/or electronic components for interference suppression of the electric motor, it is proposed that the rear shaft bearing is mounted in the motor housing, the front shaft bearing is mounted in the transmission housing and the electrical and/or electronic components required for interference suppression of the electric motor are arranged on an interference suppression circuit board arranged between the front shaft bearing and the commutator.

To simplify assembly and to reduce the susceptibility to faults of a linear drive comprising a transmission housing, an interference-suppressed electric motor which is connected thereto and is accommodated in a motor housing and which by way of a rotor accommodated in the motor housing drives a shaft which is mounted on a rear shaft end in a rear shaft bearing and is mounted on a front shaft end, a commutator for the transmission of current to the rotor, electrical and/or electronic components for interference suppression of the electric motor, it is proposed that the rear shaft bearing is mounted in the motor housing, the front shaft bearing is mounted in the transmission housing and the electrical and/or electronic components required for interference suppression of the electric motor are arranged on an interference suppression circuit board arranged between the front shaft bearing and the commutator.

A brush device (1) for electrically connecting a first element (2A) to a second element (2B) that can rotate relative to the first element (2A) about a rotational axis (L). In order to make electrical contact with the second element (2B), in a contact area (1A), the brush device (1) has a structure (1 B, 11B′, 1B″) that extends helically relative to the rotational axis (L). An E-machine (2) has a brush device (1) of this type, and a drive device has such an E-machine (2) for electrically driving a motor vehicle.