The present disclosure illustrates an electromagnetic relay device and a control method thereof. In the electromagnetic relay device, a control circuit respectively provides driving power to switch on the two electromagnetic relay units disposed adjacent to each other, and then provides the first holding power and the second holding power, lower than the driving power, to the two electromagnetic relay units after the two electromagnetic relay units are switched on, thereby maintaining the two electromagnetic relay units in the switched-on status. When the electromagnetic relay unit receiving the second holding power is tripped because of the environmental factor, the electromagnetic relay unit receiving the second holding power generates and outputs the trip feedback signal to the control circuit, so that the control circuit increases the first holding power upon receipt of the trip feedback signal. The second holding power is lower than or equal to the first holding power.

A method of regulating the operation of an electrical system. The electrical system includes, a load, at least one sensor coupled to the load configured to measure at least one characteristic of the load, a solenoid having at least one coil, at least one sensor coupled to the solenoid coil configured to measure at least one characteristic of the coil. A control circuit is coupled to the at least one load sensor and the at least one coil sensor, and includes a memory. The method includes receiving, by the control circuit, at least one load characteristic from the at least one load sensor, determining, by the control circuit, a force sufficient to maintain an electrical contact, based on the at least one load characteristic, and regulating, by the control circuit, a coil current, based on the force and based on the at least one characteristic of the coil.

A method is provided for controlling an actuator comprising an electromagnet and a control device, the electromagnet including a coil and a moving part that moves between a first position and a second position, the control device including a power supply member configured to supply the coil with an electric current having a voltage and an amperage and a measurement member for measuring a value of a quantity from among the voltage and the amperage. The method includes acquiring samples of the measured value, of regulating, according to a proportional-integral-derivative algorithm, the electric current to around a setpoint value that is equal to a maintenance value capable of maintaining the moving part in the second position, of comparing each sample to a predetermined threshold and of detecting a movement of the moving part if a single sample is above or equal to the threshold.

Provided are embodiments for operating an autonomous mode change circuit for solenoid drivers. The embodiments include initiating an operation of a solenoid, and receiving a command to control the operation of the solenoid. The embodiments also include controlling, by a drive circuit, a switch coupled to the solenoid based at least in part on the command, and detecting at least one of a current or voltage of the solenoid, and subsequently controlling the operation of the solenoid based at least in part on the detection.

An air conditioner includes an outdoor unit, a relay circuit which includes a contact and a relay coil, and a control unit which causes a first voltage equal to or higher than an operating voltage or a second voltage lower than the operating voltage and equal to or higher than a retention voltage to be applied to the relay coil. One end portion of the contact is connected to an alternating-current power supply and the other end portion of the contact is connected to the outdoor unit. One end portion of the relay coil is connected to a power supply for driving the relay circuit. The control unit causes a second voltage to be applied to the relay coil after the contact is turned ON, and causes the first voltage to be applied to the relay coil at a predetermined constant period.

There is provided an electrical assembly comprising of a latching device including a latching member configured to be positionable in a first position and a second position, the latching device further including an actuator configured to selectively move the latching member between the first and second positions and an operating state detection unit configured to detect an abnormal operating state of the latching device; and a controller configured to selectively drive the actuator to move the latching member to a selected one of the first and second positions in response to the detection of the abnormal operating state.

An electric storage apparatus includes an electric storage device and a protective circuit for cutting off a power path when detecting abnormality including overcharge, the protective circuit being connected to an outside connecting terminal, to which a power generator and an outside load operated by electric power from the electric storage apparatus are connected. The protective circuit includes a charging or discharging path connecting the electric storage device to the outside connecting terminal, a potential difference measuring unit for measuring a potential difference at two points on the charging or discharging path, the two points on the charging or discharging path being located between a positive electrode of the electric storage device and the outside connecting terminal, a self-holding switch disposed between the two points on the charging or discharging path, and a current measuring unit for measuring a current.

A method of regulating the operation of an electrical system. The electrical system includes, a load, at least one sensor coupled to the load configured to measure at least one characteristic of the load, a solenoid having at least one coil, at least one sensor coupled to the solenoid coil configured to measure at least one characteristic of the coil. A control circuit is coupled to the at least one load sensor and the at least one coil sensor, and includes a memory. The method includes receiving, by the control circuit, at least one load characteristic from the at least one load sensor, determining, by the control circuit, a force sufficient to maintain an electrical contact, based on the at least one load characteristic, and regulating, by the control circuit, a coil current, based on the force and based on the at least one characteristic of the coil.

A controllable trip device includes a magnetic actuator, including a coupling member intended to be coupled to a switching mechanism of an electrical circuit breaker to cause the switching thereof and a coil configured to displace the coupling member towards a tripped position when it is supplied with a pulse of a current of intensity greater than a first predefined threshold for a duration greater than or equal to a predefined duration, a control device, configured to supply the coil, immediately on receipt of a control signal, with a series of pulses of duration equal to the predefined duration and of intensity greater than or equal to the first threshold and less than or equal to a second threshold equal at most to 120% of the first threshold.

The present disclosure illustrates an electromagnetic relay device and a control method thereof. In the electromagnetic relay device, a control circuit respectively provides driving power to switch on the two electromagnetic relay units disposed adjacent to each other, and then provides the first holding power and the second holding power, lower than the driving power, to the two electromagnetic relay units after the two electromagnetic relay units are switched on, thereby maintaining the two electromagnetic relay units in the switched-on status. When the electromagnetic relay unit receiving the second holding power is tripped because of the environmental factor, the electromagnetic relay unit receiving the second holding power generates and outputs the trip feedback signal to the control circuit, so that the control circuit increases the first holding power upon receipt of the trip feedback signal. The second holding power is lower than or equal to the first holding power.