Disclosed is a DC adaptor for driving a magnetic contactor including at least: an AC input terminal; a capacitor connected to the AC input terminal; an electronic switch connected to the capacitor in parallel; a full-wave rectifier which converts an AC current into a DC current; a DC output connecting line which receives the DC current from the full-wave rectifier to transmit the DC current to the magnetic contactor; a sensing unit which measures a current value of a driving coil of the magnetic contactor; a controller which compares the measured current value with a reference value to output an on/off control signal of the electronic switch; a DC power source which generates a DC power using the DC current converted by the full-wave rectifier; and a housing which accommodates the above elements.

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.

A relay control device is provided configured to reduce the amount of power supplied to a coil in an electromagnetic relay. The relay control device includes a control unit for generating and outputting a PFM signal to control the voltage-drop DC/DC converter unit, a filter unit allowing passage of the PFM signal, and a circuit unit controlling the operation of the voltage-drop DC/DC converter unit in accordance with the output signal of the filter unit. If the filter unit does not allow passage of the PFM signal, the circuit unit prevents the voltage-drop DC/DC converter unit from dropping the voltage, and performs control so as to output the power supply voltage to a coil in the electromagnetic relay. If the filter unit prevents the PFM signal from passing, a current path from a power supply potential to a ground potential within a circuit unit is cut off by transistors.

A relay control device is provided configured to reduce the amount of power supplied to a coil in an electromagnetic relay. The relay control device includes a control unit for generating and outputting a PFM signal to control the voltage-drop DC/DC converter unit, a filter unit allowing passage of the PFM signal, and a circuit unit controlling the operation of the voltage-drop DC/DC converter unit in accordance with the output signal of the filter unit. If the filter unit does not allow passage of the PFM signal, the circuit unit prevents the voltage-drop DC/DC converter unit from dropping the voltage, and performs control so as to output the power supply voltage to a coil in the electromagnetic relay. If the filter unit prevents the PFM signal from passing, a current path from a power supply potential to a ground potential within a circuit unit is cut off by transistors.

A method of dispensing fluid from an apparatus includes determining a phase offset to separate actuation of a plurality of valve sub-sets into phases and determining a sub-phase offset to separate actuation of valves within each of the plurality of valve sub-sets. The method also includes sequentially actuating valves in a first sub-set based on the sub-phase offset, and sequentially actuating valves in a second sub-set based on the phase offset and the sub-phase offset such that (i) at least one valve in the second sub-set is actuated out of phase from a preceding valve in the first sub-set by the phase offset; and (ii) the at least one valve in the second sub-set is actuated out of phase from a preceding valve in the second sub-set by the sub-phase offset.

Disclosed is a DC adaptor for driving a magnetic contactor including at least: an AC input terminal; a capacitor connected to the AC input terminal; an electronic switch connected to the capacitor in parallel; a full-wave rectifier which converts an AC current into a DC current; a DC output connecting line which receives the DC current from the full-wave rectifier to transmit the DC current to the magnetic contactor; a sensing unit which measures a current value of a driving coil of the magnetic contactor; a controller which compares the measured current value with a reference value to output an on/off control signal of the electronic switch; a DC power source which generates a DC power using the DC current converted by the full-wave rectifier; and a housing which accommodates the above elements.

The present invention relates to a relay (1), having a first terminal (2), a second terminal (3), a contact (4) which in a closed state brings about an electrical connection between the first and second terminals (2, 3) and which in an opened state electrically disconnects the first and second terminals (2, 3), a first electromagnet (5) which is configured in such a way that it places the contact (4) in the closed state if the first electromagnet (5) is switched on, and a second electromagnet (6) which is configured in such a way that it keeps the contact (4) in the closed state if the contact (4) is in the closed state and the second electromagnet (6) is switched on.

The present invention relates to a relay (1), having a first terminal (2), a second terminal (3), a contact (4) which in a closed state brings about an electrical connection between the first and second terminals (2, 3) and which in an opened state electrically disconnects the first and second terminals (2, 3), a first electromagnet (5) which is configured in such a way that it places the contact (4) in the closed state if the first electromagnet (5) is switched on, and a second electromagnet (6) which is configured in such a way that it keeps the contact (4) in the closed state if the contact (4) is in the closed state and the second electromagnet (6) is switched on.

A damper system may include an electrically adjustable hydraulic shock absorber having an electromechanical valve and a damper controller. The damper controller may include a solenoid driver circuit electrically coupled to the electromechanical valve, and disposed at the shock absorber. The solenoid driver circuit may be operable to drive the electromechanical valve in an open state in which hydraulic fluid flows between a pressure tube and a reserve tube. The solenoid driver circuit may include a plurality of transistors that are operable to generate a first current to place the electromechanical valve in the open state and a second current less than the first current to hold the electromechanical valve in the open state.

A damper system may include an electrically adjustable hydraulic shock absorber having an electromechanical valve and a damper controller. The damper controller may include a solenoid driver circuit electrically coupled to the electromechanical valve, and disposed at the shock absorber. The solenoid driver circuit may be operable to drive the electromechanical valve in an open state in which hydraulic fluid flows between a pressure tube and a reserve tube. The solenoid driver circuit may include a plurality of transistors that are operable to generate a first current to place the electromechanical valve in the open state and a second current less than the first current to hold the electromechanical valve in the open state.