Solenoid ActuatorsSolenoid OutlineReference ListIntroductionConstructionSlide 6Slide 7PrinciplesApplicationsMajor Specifications – Selection FactorsSlide 11LimitationsAdvantagesTypes of SolenoidsSolenoid ActuatorsSolenoid ActuatorsClint TorgersenClint TorgersenECE 5320 Assignment #1ECE 5320 Assignment #1Solenoid OutlineSolenoid OutlineReference ListReference ListIntroductionIntroductionConstructionConstructionPrinciplesPrinciplesApplicationsApplicationsMajor Specifications – Selection FactorsMajor Specifications – Selection FactorsLimitationsLimitationsAdvantagesAdvantagesReference ListReference ListTexas Instruments Texas Instruments http://focus.ti.comhttp://focus.ti.comBully Dog Technologies fig 1 Bully Dog Technologies fig 1 http://www.bullydog.comhttp://www.bullydog.comDakota Digital Dakota Digital http://www.dakotadigital.comhttp://www.dakotadigital.comIntroductionIntroductionSolenoids convert electrical energy into Solenoids convert electrical energy into mechanical workmechanical workThis tutorial faces the issues of linear This tutorial faces the issues of linear actuator solenoids – push and pullactuator solenoids – push and pullConstructionConstructionA standard solenoid is constructed with a core, inside the coil, made of two sections - a fixed pole piece, or backstop (A), A movable armature or plunger (B)ConstructionConstructionAnd an iron frame around the coil winding (C). The magnetic lines of force created by the electric current in the coil react to close the gap (D)ConstructionConstructionBetween the plunger and backstop; the plunger moves and generates a linear force - mechanical work.The movable plunger is held in position in the center of the coilwinding by a guide (E) which may be made either of non-magnetic metal or plastic.PrinciplesPrinciplesCurrent passing through a helical coil winding of closely spaced turns of copper magnet wire produces a magnetic field which surrounds the coil. If an iron structure is assembled around the winding, the magnetic force is channeled through the metal and is considerably increased because of the magnetic permeability of the iron. All solenoids develop magnetizing force, which has a relationship to the current and number of turns in the coil.ApplicationsApplicationsAutomotiveAutomotiveLinear MovementLinear MovementSmall Valve MechanismsSmall Valve MechanismsFlow ControlFlow ControlNon-Stick LatchesNon-Stick LatchesAnywhere where fast linear movement is Anywhere where fast linear movement is requiredrequiredMajor Specifications – Selection Major Specifications – Selection FactorsFactorsVoltage – Standard values may be listed Voltage – Standard values may be listed for both AC and DC typesfor both AC and DC typesDuty cycleDuty cycle - Specifies the length of time - Specifies the length of time the solenoid coil is to be electrically the solenoid coil is to be electrically energized and de-energized. They range energized and de-energized. They range from continuous to 5% intermittentfrom continuous to 5% intermittentCurrent and PowerCurrent and PowerTemperatureTemperatureMajor Specifications – Selection Major Specifications – Selection FactorsFactorsStroke – Distance the plunger must travelStroke – Distance the plunger must travelForce – Push or pull energy the actuator Force – Push or pull energy the actuator must exertmust exertMounting and Environment – Coil heat is Mounting and Environment – Coil heat is bad for the Solenoidbad for the SolenoidCodes and StandardsCodes and StandardsLimitationsLimitationsTemperature of device may increase very Temperature of device may increase very fastfastLimited to current input possibleLimited to current input possibleLimited to force of actuatorLimited to force of actuatorLarge force = Lots of moneyLarge force = Lots of moneyMust be mounted very firmMust be mounted very firmMust control with PWM or ACMust control with PWM or ACAdvantagesAdvantagesVery strongVery strongVery fastVery fastVery customizable to specificationsVery customizable to specificationsSeveral ManufacturersSeveral ManufacturersGreat for high power short burstsGreat for high power short burstsTypes of SolenoidsTypes of SolenoidsLinearLinearRotaryRotaryLong StrokeLong StrokeMicro MachineMicro MachineHigh PowerHigh
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