subject: The Defining Traits Of Modern Voice Coil Actuators [print this page] Till a few decades ago, voice coil actuators were used in radio loud speakers. However, today you shall find them being widely used in applications where servo control is required. These devices work on the Lorentz Force Principle, which says that if a conductor carrying current is placed in a magnetic field, a force will act upon the conductor. The magnitude of this force depends on various factors such as the number of conductors, the current, the length of the conductor and the magnetic flux density.
In an actuator, the exact amount of force generated can be kept predictable by keeping the length of the conductor, and the magnetic field constant. This actuator type can be found in various devices such as drives of computer and DVD players, medical equipment and a number of modern laser tools. These devices require precise motion, and the lack of the same could hamper the overall operations of the devices.
Hence, the configuration of the voice coil actuators is very important so that it can deliver predictable, precise and repeatable motion. When you purchase these actuators from a renowned manufacturer, you can expect a wide range of operating strokes that meet your desired expectations.
These actuators are also used for active vibration control in a number of machines, air crafts and automotive. In most cases, you shall find two different types of configurations in these actuatorsthe long coil configuration and the short coil configuration. Each of these has their advantages and disadvantages that must be considered carefully before choosing one. It is recommended that you seek the professional opinion of a manufacturer of such actuators to understand the exact product that suits your specifications. Most firms that manufacture such actuators also make cryocooler motors.
There are some defining aspects of a voice coil actuator that you can use as reference points while making an actual purchase decision. They are listed below:These linear actuators need to offer you ultra-high performance even for challenging applications such as rotorcrafts.
If these devices have been manufactured using high tech materials and components, you can expect unmatched performance attributes. Check for factors such as zero (or low) maintenance and a long service life. Typically, you should expect a service life of around 3000 hours or more so as to get optimum value for your investment.These actuators are increasingly being used in the rotorcraft industry that needs active vibration control. This means that the actuators must offer flawless performance. To achieve this, these actuators need to have a high output to weight ratio.
You could choose between standard or customized voice coil actuators. Apart from these actuators, cryocooler motors are also required in certain applications. They are available in moving and armature coil varieties.
