An electromagnetic relay is provided. The electromagnetic relay includes a first port and a second port, a first coil and a second coil, a movable armature coupled between the first port and the second port constructed to connect and disconnect the first port and the second port, a switch circuit, and a coil control circuit. The switch circuit is constructed to connect the first coil to an external power source to induce the first coil to create a first magnetic field having a first direction and disconnect the first coil from the external power source to cause the first magnetic field to collapse. The coil control circuit is constructed to induce the second coil to create a second magnetic field having a second direction responsive to the switch circuit being in the second state, the second direction being opposite the first direction.

A starter for an internal combustion engine includes an electric motor and a solenoid switch. The solenoid switch includes a housing, a fixed core, a movable core, two spaced contacts, and a conductive member arranged to interconnect the contacts when the solenoid is turned on. The movable core is connected to a pinion of the motor which is movable to engage with a flywheel of the engine. The fixed core includes a pull-in coil of aluminum wire, a holding coil of copper wire, and a magnetic core. The motor is connected in series with the pull-in coil. When the solenoid is energized, the coils generate a magnetic field that attracts the movable core to the magnetic core, thereby the moving the pinion into engagement with the flywheel and causing the conductive member to interconnect the contacts.

A starter for an internal combustion engine includes an electric motor and a solenoid switch. The solenoid switch includes a housing, a fixed core, a movable core, two spaced contacts, and a conductive member arranged to interconnect the contacts when the solenoid is turned on. The movable core is connected to a pinion of the motor which is movable to engage with a flywheel of the engine. The fixed core includes a pull-in coil of aluminum wire, a holding coil of copper wire, and a magnetic core. The motor is connected in series with the pull-in coil. When the solenoid is energized, the coils generate a magnetic field that attracts the movable core to the magnetic core, thereby the moving the pinion into engagement with the flywheel and causing the conductive member to interconnect the contacts.

An electromagnetic relay includes a first fixed terminal, a second fixed terminal, a movable contact piece, a moving member, a drive device, and a magnet member. The first fixed terminal includes a first fixed contact. The second fixed terminal includes a second fixed contact. The movable contact piece includes a first movable contact facing the first fixed contact in a first direction and a second movable contact facing the second fixed contact in the first direction, the first direction including a contact direction toward the first fixed contact and a separation direction away from the first fixed contact. The moving member is connected to the movable contact piece. The drive device includes a coil, a movable iron core, and a first yoke. The coil generates electromagnetic force. The movable iron core is arranged radially outside of the coil and is fixed to the moving member. The first yoke includes an attracting portion to attract the movable iron core by the electromagnetic force. The magnet member is arranged radially outside of the coil and assists the attracting portion to attract the movable iron core.

An electromagnetic relay includes a first fixed terminal, a second fixed terminal, a movable contact piece, a moving member, a drive device, and a magnet member. The first fixed terminal includes a first fixed contact. The second fixed terminal includes a second fixed contact. The movable contact piece includes a first movable contact facing the first fixed contact in a first direction and a second movable contact facing the second fixed contact in the first direction, the first direction including a contact direction toward the first fixed contact and a separation direction away from the first fixed contact. The moving member is connected to the movable contact piece. The drive device includes a coil, a movable iron core, and a first yoke. The coil generates electromagnetic force. The movable iron core is arranged radially outside of the coil and is fixed to the moving member. The first yoke includes an attracting portion to attract the movable iron core by the electromagnetic force. The magnet member is arranged radially outside of the coil and assists the attracting portion to attract the movable iron core.

An electromagnetic relay includes a first fixed terminal with a first fixed contact; a movable contact piece with a first movable contact on a first surface thereof facing the first fixed contact; a drive device with drive shaft to move the movable contact piece; a contact case; and a guide wall. The guide wall is connected to an inner surface of the contact case. The guide wall leads a first airflow around the first fixed contact and the first movable contact toward a second surface of the movable contact piece, which is on the side of the movable contact piece that is opposite to the first side. The first airflow is caused by current flowing between the first fixed contact and the first movable contact.

An electromagnetic relay includes a first fixed terminal with a first fixed contact; a movable contact piece with a first movable contact on a first surface thereof facing the first fixed contact; a drive device with drive shaft to move the movable contact piece; a contact case; and a guide wall. The guide wall is connected to an inner surface of the contact case. The guide wall leads a first airflow around the first fixed contact and the first movable contact toward a second surface of the movable contact piece, which is on the side of the movable contact piece that is opposite to the first side. The first airflow is caused by current flowing between the first fixed contact and the first movable contact.

Provided is an electromagnetic relay that is reduced in size and has great flexibility in designing. For this purpose, when a predetermined time has passed after generation of an arc at least either between a movable contact and a fixed contact or between a movable contact and a fixed contact, an arc generated between the movable contact and the fixed contact is extended by a magnetic field generation unit to be longer than an arc generated between the movable contact and the fixed contact.

A solenoid drive may include a ferromagnetic housing having a coil receiving chamber axially limited by opposing first and second face side walls, and a cylindrical coil arrangement having at least one electric coil, and being arranged in the coil receiving chamber and coaxially surrounding a cylindrical coil interior space. The solenoid drive may also include a ferromagnetic plunger stop having a central region projecting axially in the coil interior space, and a ferromagnetic plunger arranged at the housing opposing the plunger stop. The plunger may project axially into the coil interior space, and may be adjustable axially bi-directionally between an active position proximal to the central region and a passive position distal to the central region. The solenoid drive may further include a ferromagnetic bypass device arranged coaxially to the coil arrangement, radially within the at least one coil, and spaced apart axially from the face side walls.

An electrical relay (2) includes an electromagnetic drive system for providing bi-directional drive. The electrical relay (2) includes a first a coil (212) and a second coil (213). A current is supplied to the coils (212) and (213) in opposite directions. The two coils (212) and (213) can be used to accelerate the armature in either direction in relation to the two contacts. This can be used to drive the armature to either one of the contacts and to accelerate and decelerate the armature during a single transit. In the latter regard, the armature can be accelerated and decelerated to shorten the transit time, reduce bounce, reduce wear on the contacts, and allow for different contact material options.