An actuation system to achieve soft landing and the control method thereof are provided. A soft landing is achieved via an open loop control of an electromagnetic actuator. The actuation system includes a control unit, wherein the control unit controls the electromagnetic actuator. The control unit does not rely on sensor data regarding a position of an armature to achieve the soft landing. As the actuation system achieves soft landing via the open loop control of the electromagnetic actuator by the control unit, a use of the sensor data is not needed.

A drive circuit anomaly diagnosing device of the present invention performs an anomaly diagnosis on a drive circuit including a power supply line on which a solenoid is disposed midway, a main switch disposed on the power source side relative to the solenoid, a first diode disposed on a protection line connecting a point between the main switch and the solenoid to ground with a forward direction corresponding to a direction from the ground side to the power source side, and a first capacitor interposed on a first line connecting a point between the protection line and the solenoid to the ground midway on the power supply line, the drive circuit being configured to supply power to the solenoid, on the basis of a current detected by a first current sensor disposed upstream of the main switch on the power supply line.

A method of providing diagnostic information for an electromagnetic latch assembly (122) includes providing a pulse to a circuit (200) that include one or more electromagnetic latch assemblies. The circuit (200) includes coils (199) of the electromagnetic latch assemblies. Each coil is inductively coupled with an armature (131) that is mechanically coupled to a latch pin (118). The circuit (200) is pulsed and a DC current in the circuit (200) that results from the pulse is measured over a first interval to determine a primary response. The current in the circuit (200) over a second interval is measured to determine a reference response. A second pulse may be used to generate the current for the reference response. The primary response and the reference response are compared to provide diagnostic information relating to position or movement of one or more of the latch pins (118).

A drive circuit for controlling a solenoid valve having a solenoid coil and a poppet that translates therein is provided. The drive circuit includes a supply bus, a return bus, a flyback circuit, and a switch. The supply bus is configured to couple the solenoid coil to a power supply and supply a coil current. The return bus is configured to provide a ground path for the coil current. The flyback circuit is coupled in parallel to only the solenoid coil. The flyback circuit includes only a bipolar diode. The switch is coupled in series with the solenoid coil and configured to couple and decouple the solenoid coil to the return bus.

A circuit for preventing sparks. The circuit having a power storage component having a first power storage end and a second power storage end; a power source electrically connected to the power storage component, the power source having a first power source end and a second power source end; a first current directional component electrically connected to the power storage component and having a first current direction; a first power absorption component electrically connected to the power storage component and having a current direction, the first current directional component and the first power absorption component being electrically connected to the power storage component in parallel; and at least one switch electrically connected to the power storage component.

A circuit for preventing sparks. The circuit having a power storage component having a first power storage end and a second power storage end; a power source electrically connected to the power storage component, the power source having a first power source end and a second power source end; a first current directional component electrically connected to the power storage component and having a first current direction; a first power absorption component electrically connected to the power storage component and having a current direction, the first current directional component and the first power absorption component being electrically connected to the power storage component in parallel; and at least one switch electrically connected to the power storage component.

De-magnetization protection is provided for electro-permanent magnets during information handling system manufacture and use by monitoring thermal conditions at the information handling systems to detect a thermal state associated with de-magnetization and commanding the electro-permanent magnets to an off state so that both magnets in the electro-permanent magnet have opposing polarities. The opposing polarities tend to stabilize magnet polarity to prevent de-magnetization during increased temperatures. Normal operations are then re-enabled once temperatures decrease.

Disclosed is a method for closing the contacts of an electrical switching device during a switch-on process, wherein for a fixed first time period, the first time period and the first voltage being selected in such a way that the armature is not set into motion during the first time period, or the first voltage is applied to the coil until a certain current value is reached, the first time period being the time period until said certain current value is reached, and the first voltage being selected in such a way that the armature is not set into motion during the first time period, wherein a suitable second voltage is defined, the second voltage being greater than the first voltage and being applied to the coil during a second time period in order to move the armature from the open position into the closed position.

A solenoid and a solenoid control device, the solenoid control device including: a solenoid having a first coil, a variable resistor connected to one end of the first coil in series, and a second coil connected with the first coil in parallel; a drive device that drives the solenoid by supplying power to the dual coils; and a controller that controls the solenoid through the drive device.

The present invention controls the pressure and flow rate of fluid, in order to obtain uniform performance, configure a closed loop magnetic circuit so as to include an electromagnet, a flapper, and a yoke material, and elastically deform the flapper itself by Maxwell attractive force generated between a magnetic pole of the electromagnet and the flapper to make the separation distance between the nozzle and the flapper variable. As opposed to a rigid flapper structure that swingably moves around a supporting point, like a conventional servo valve, the electromagnet, the magnetic pole, the nozzle, the flapper, and the like are arranged such that a change in magnetic gap directly leads to a change in air gap.