The response time to move the plunger is the same for both solenoids. However, the conventional solenoid consumes power during the full duration of the ON cycle. The latching solenoid requires only a pulse of current to change state and consumes no power to maintain the ON cycle. Conventional solenoids are restricted to generating forces up to a 100% duty cycle and may be subject to heat dissipation problems. The latching solenoid can be turned off during most of the ON cycle, allowing the use of a higher current pulse. This produces faster operation and generates higher pull force without the excessive power consumption or heat generation of a conventional solenoid. In addition, the possibility of applying a higher current to generate more force may allow for a smaller actuator, potentially reducing the cost.
While latching actuators can offer performance advantages in a variety of applications, latching actuator technology may not be well suited for use in applications where the actuator is required to fail to a known position upon power failure. Since latching actuators need to be powered to change state, the actuator would maintain its position when the power failed. However, it is feasible to include a drive circuit with an energy storage feature in the control circuitry to allow the actuator to be positioned properly in the event of a power failure.
Both PM and RM latching actuators can be custom designed in either open frame or tubular solenoids as push, pull, or bi-stable (push-pull) arrangements. They can also be designed in two or three-position configurations depending on the application requirements. In addition, a variety of drive circuits ranging from a simple diode-resistor circuit to the more complex pulse width modulation current control circuit can be used to offer a green and cost effective solution for your application.
If you are looking for ways to “green” your application, contact our Technical Team to discuss your current or future project needs. TLX Technologies has successfully helped customers improve efficiency, reduce product size and lower power consumption for their applications.