An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562° C. or a mixed material that contains the low-boiling point material.

A driving device includes a motor and a control unit for controlling of the motor. The motor includes a motor body and an end cap assembly disposed at one end of the motor body. The motor body comprises a stator, a rotor rotatable relative to the stator, and a motor shaft fixed to and rotated with the rotor. The end cap assembly is provided with two brushes. The control unit includes two connectors for connecting with an external power source. The two brushes are respectively electrically connected to the connectors through the control unit. Lengths of connecting routes of the two brushes to the corresponding connectors are substantially equal to each other.

A driving device includes a motor and a control unit for controlling of the motor. The motor includes a motor body and an end cap assembly disposed at one end of the motor body. The motor body comprises a stator, a rotor rotatable relative to the stator, and a motor shaft fixed to and rotated with the rotor. The end cap assembly is provided with two brushes. The control unit includes two connectors for connecting with an external power source. The two brushes are respectively electrically connected to the connectors through the control unit. Lengths of connecting routes of the two brushes to the corresponding connectors are substantially equal to each other.

An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562 C. or a mixed material that contains the low-boiling point material.

A driving device includes a motor and a control unit for controlling of the motor. The motor includes a motor body and an end cap assembly disposed at one end of the motor body. The motor body comprises a stator, a rotor rotatable relative to the stator, and a motor shaft fixed to and rotated with the rotor. The end cap assembly is provided with two brushes. The control unit includes two connectors for connecting with an external power source. The two brushes are respectively electrically connected to the connectors through the control unit. Lengths of connecting routes of the two brushes to the corresponding connectors are substantially equal to each other.

A driving device includes a motor and a control unit for controlling of the motor. The motor includes a motor body and an end cap assembly disposed at one end of the motor body. The motor body comprises a stator, a rotor rotatable relative to the stator, and a motor shaft fixed to and rotated with the rotor. The end cap assembly is provided with two brushes. The control unit includes two connectors for connecting with an external power source. The two brushes are respectively electrically connected to the connectors through the control unit. Lengths of connecting routes of the two brushes to the corresponding connectors are substantially equal to each other.

The purpose of the present invention is to provide an electric power supply system that is superior to conventional systems. This electric power supply system has a configuration in which: a fixed member 8 is provided with an inner conductor 9 arranged along the axial direction of the fixed member 8, an outer conductor 13 arranged along the axial direction of the fixed member 8 so as to cover the inner conductor 9, and a high-frequency conductive path dielectric 5 disposed between the inner conductor 9 and the outer conductor 13; a rotating member 7 is provided with an inner conductor 9 arranged along the axial direction of the rotating member 7, an outer conductor 13 arranged along the axial direction of the rotating member 7 so as to cover the inner conductor 9, and a high-frequency conductive path dielectric 5 disposed between the inner conductor 9 and the outer conductor 13; a high-frequency electric power source 27, the outer conductor 13 of the fixed member 8, the outer conductor 13 of the rotating member 7 and a load 26 are electrically connected so that it is possible to supply electric power from the high-frequency electric power source 27 to the load 26; and the fixed member 8 and the rotating member 7 are combined to form an electromagnetic wave attenuation structure for attenuating the electromagnetic waves emitted from the electric power supply system.

A power terminal includes a terminal beam having a mating surface. A protective thermal coupler bridge is positioned adjacent the terminal beam having a bridge conductor, an insulating substrate and a bridge pad. The bridge pad has a mating surface. A variable resistive member is electrically coupled between the terminal beam and the bridge conductor to provide a shunt so that arcing does not occur when the power terminal is disconnected from the mating power terminal. The mating surface of the terminal beam is separable before the mating surface of the bridge pad is disconnected so that the resistance in the variable resistive member increases after disconnection of the main power terminal from the mating power terminal and prior to disconnection of the bridge pad from the mating power terminal to shunt the current through the bridge conductor and the variable resistive member during unmating.

A power terminal includes a terminal beam having a mating surface. A protective thermal coupler bridge is positioned adjacent the terminal beam having a bridge conductor, an insulating substrate and a bridge pad. The bridge pad has a mating surface. A variable resistive member is electrically coupled between the terminal beam and the bridge conductor to provide a shunt so that arcing does not occur when the power terminal is disconnected from the mating power terminal. The mating surface of the terminal beam is separable before the mating surface of the bridge pad is disconnected so that the resistance in the variable resistive member increases after disconnection of the main power terminal from the mating power terminal and prior to disconnection of the bridge pad from the mating power terminal to shunt the current through the bridge conductor and the variable resistive member during unmating.

A power terminal includes a terminal beam having a mating surface. A protective thermal coupler bridge is positioned adjacent the terminal beam having a bridge conductor, an insulating substrate and a bridge pad. The bridge pad has a mating surface. A variable resistive member is electrically coupled between the terminal beam and the bridge conductor to provide a shunt so that arcing does not occur when the power terminal is disconnected from the mating power terminal. The mating surface of the terminal beam is separable before the mating surface of the bridge pad is disconnected so that the resistance in the variable resistive member increases after disconnection of the main power terminal from the mating power terminal and prior to disconnection of the bridge pad from the mating power terminal to shunt the current through the bridge conductor and the variable resistive member during unmating.