Linear Solenoids  Classification & Mechanism  Applications   Selection Factors    Option Board

Selection Factors for Swing/Rotary Solenoid

Bear these factors in mind while selectiong Swing / Rotary solenoids, or fill out Application Condition & Requirement Form (Optiona Board)

  1. Output Requirements:
    1. Torque = Force arm × working force  (n.m).
      (Ideal Result: Solenoid generated torque curve matching that demanded by application)
    2. Keep/Hold force: generated by Rotor’s permanent magnetism, without current flow in solenoid.
    3. Response time: (refer Structure & Mechanism) with rated voltage and load, time from energizing solenoid to swing rod moving from one stop to the other stop.
    4. Swing angle: should consider the maximum angle and operational angle.
    5. Operation Cycle is: (refer Structure & Mechanism) with the electric on / off of solenoid, swing rod moves from one stop to the other stop, and returns from the other to original stop.
    6. Operation frequency: Operation cycle within certain amount of time.
      (Electric on time portion among one operation cycle, operation frequency, and power of solenoid decide temperature rise. While ambient temperature and temperature rise are vital factors of insulation class concerns. Ref.: Insulation Class = ℃: A=105,  E=120,  B=130,  F=155,  H=180,  N=200,  C=220+)
  2. Input Conditions
    1. Power Supply Type: different current wave shapes produce different solenoid motions. Supply may be: AC/DC (constant voltage / Current Supply, battery, dry cell, DC generator, capacitor), commutate and filer methods.
    2. Rated Voltage and operation voltage range.  Maximum current capacity of the supply.
    3. Diode as Rectifier:
      If the power supply available for the solenoid is AC, a rectifier is required to convert it into DC. The rectifier should in principles be designed to be of full-wave rectificatino type. The rectifier elements should have a peak inverse voltage three times as high as the solenoid drive voltage.
    4. Current or power is in proportion to force output within limited range. Force won’t increase any more with current / power increase when solenoid gained magnetic saturation.
      In the mean time: Temperature Rise increase in proportion to current / power.)
  3. Environment Factor & Life:
    These are critical for material and finish consideration.
    Environment factors include: temperature; humidity; magnetic or electric field; gas, liquid, dust pollutants or corrosives; impact or vibration, etc.
  4. Connection methods of Assembling, Power supply and load; and dimensions.
    1. Assembly methods: a). external bolt.   b). solenoid frame thread holes   c). Fitting in
    2. Power supply connection method:  a). Lead wire    b). Lead wire + connector   c). 187 quick connect terminals
    3. Load connection method: usually through standard swing rod.
  5. Protection of Contacts in Driving Circuit
    The control contacts for use with the DC Solenoid may spartk, wear and cause noise interference. Provide a proper protection  as the case maybe.
    Resistor & Capacitor Method Diode Insertion Method