How does a voice coil actuator work?
Voice coil actuators work on the principle of the Lorentz force, which is the force generated when a current-carrying conductor is placed in a magnetic field. In the case of a voice coil actuator, the magnetic field is created by permanent magnets and the conductor is a coil of wire.
Is a bigger voice coil better?
Coil Size Matters Well, the larger you make the voice coil, the more power it can handle—but at the same time, it also generates more heat. Smaller coils can be a little more resonant, but larger coils tend to have better control.
How hot can voice coils get?
This heating of the voice-coil has various ramifications. In extremis, it can destroy a drive-unit, although that rarely occurs with modern hi-fi loudspeakers, which typically are constructed to withstand voice-coil temperatures in excess of 200°C (390°F).
What is a voice coil stage?
The Voice Coil Positioning Stage is a compact, small footprint positioning stage. It is ideal for closed loop positioning applications with a short stroke where intricate position, velocity, and acceleration control is necessary. Their compact size allows them to fit into small spaces.
What are voice coil motors used for?
Voice coil actuators are typically used in focusing applications, oscillatory systems, mirror tilting, and miniature position control.
What is a linear voice coil motor?
Linear DC Motors, Voice Coil Motors (VCM) or Voice Coil Actuators (VCA) are the simplest type of electric motors. These motors consist of two separate parts; the magnetic housing and the coil. Applying a voltage across the terminals of the motor causes the motor to move to one direction.
What Hz is good for bass?
Having clean bass frequencies is enough to get amazing bass through any audio system. The bass frequencies are from 20Hz to 160Hz. The best frequencies to boost for bass in a song, are around 50Hz and 80Hz. These frequencies make sure that the bass sounds full and powerful.
What is a high temp voice coil?
Coils are wound using our proprietary high-temperature adhesive capable of withstanding operating temperatures upwards of 500°F. This attribute has led customers to turn to us when competitors’ coils have come apart due to adhesive failure.
What causes voice coils to overheat?
This excessive movement of the voice coil is known as over-excursion. The high and inconsistent electrical current sent by the power amp causes the speaker’s voice coil to overheat, and eventually, it breaks. This will damage your speakers, and you may have to repair or replace it.
What is a voice coil motor?
Voice coil motors (VCM) or voice coil actuators (VCA) are non-commutated DC linear actuators that consist of a single-pole permanent magnet and a copper coil. VCMs are two-lead, single phase motors that do not require commutation, resulting in simple operation.
What is voice coil of a loudspeaker?
The speaker coil or loudspeaker voice coil is a coil of wire attached to the apex of a loudspeaker cone. Current passing through the speaker coil provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.
What are voice coil actuator modules?
The Voice Coil Actuator Modules are zero backlash, ironless direct drives with built-in linear position sensor and cross roller guide. These moving coil motors are suitable for medium duty applications where high motion frequency, accuracy and repeatability are required. They provide smooth steady motion even at low speeds.
What is the difference between a linear actuator and voice coil?
A non-commutated DC linear actuator, typically referred to as a voice coil, is capable of a displacement of up to 5 in., whereas most actuators have displacements up to 2 in. Voice coils come in a range of sizes, from devices that generate a few ounces of force, to others that generate several hundred pounds of force.
What is the maximum stroke length of a voice coil?
Voice coils are suitable for fixed-stroke applications, with typical maximum strokes of 5 to 6 inches. The force generated is fairly constant throughout the stroke length, with a small dropoff, typically less than 5 percent, at the ends of stroke.
What is the temperature of the voice coil?
The voice coil got up to a temp of 24.5°C in the first 15 seconds of operation at 1 A and then rose to 33 °C over the following 15 seconds (Total 30 seconds of operation at 1 A).