How do you control a voice coil motor?

Starts here2:53Voice Coil Actuator – YouTubeYouTubeStart of suggested clipEnd of suggested clip34 second suggested clipIn voice coil. Applications. The Juke Series motor is a simple 2 wire device that is easy to controlMoreIn voice coil. Applications. The Juke Series motor is a simple 2 wire device that is easy to control with most motor drives. The lightweight moving mass allows for high accelerations.

How does a moving voice coil work?

The moving coil loudspeaker uses the magnetic effect generated by a flowing current as the basis of its operation. When a current flows in a wire, a magnetic field appears around it. If the coil is attached to a large diaphragm, then the sound waves will be more effectively transferred to the air.

How does a linear 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. When current is applied to the coil, a force is generated, and the magnitude of the force is proportional to the applied current.

What are voice coil motors used for?

The linear voice coil motor (VCM) is a direct drive and hysteresis-free device used for providing highly accurate linear motion. The linear VCMs utilize a magnetic field generated by permanent magnets in connection with a coil of wires to produce an electric driving force for high precision position control.

Can you fix a voice coil?

There is a variety of issues that can occur with speaker voice coils, and sometimes it is possible to repair them. Occasionally on smaller speakers with no adjustments it can be possible to repair them by easing them back into the centre. Gently hold the cone – remember it is made of paper and can damage easily.

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.

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. Some speakers have to have larger coils.

What is a voice coil actuators?

A voice-coil actuator, also known as a noncommutated DC linear actuator, is a type of direct-drive linear motor. The current flowing through the coil assembly interacts with the permanent magnetic field and generates a force vector perpendicular to the direction of the current.

What do actuators do?

An actuator is a device that uses a form of power to convert a control signal into mechanical motion. Industrial plants use actuators to operate valves, dampers, fluid couplings, and other devices used in industrial process control. The industrial actuator can use air, hydraulic fluid, or electricity for motive power.

What is linear motor technology?

linear motor, power source providing electric traction in a straight line, rather than rotary, as in a conventional motor; it is useful in such applications as high-speed ground transportation. Electric energy is generated on the vehicle or is picked up by trolley from a power line paralleling the track.

How do you know if a voice coil is blown?

Blown Speaker Symptoms Distortion at Normal Volumes – If even at moderate volumes you hear hiss, static, and fuzz, then you have one of two problems on your hands. You either have loose or damaged voice coils or you have a torn cone. If you turn up the volume the problem should get worse.

How do you align a voice coil?

Starts here4:41How to fix a ‘blown’ loudspeaker with coil rub – YouTubeYouTube

How do voice coils work?

Voice coils are based on a copper coil energized by an electric current and placed inside a magnetic field usually provided by permanent magnets. The force generated by the coil is proportional to the magnetic field and the direction and magnitude of the electric current.

What is a voicevoice coil actuator?

Voice coil actuators are a type of direct drive mechanism that provides extremely precise positioning over small displacements. Like linear motors, they work on the principle of a permanent magnet field and a coil winding. When a current is applied to the coil, a force is generated.

What is the Lorentz force of a voice coil?

This force, known as the Lorentz force, is determined by the product of the current and the magnetic flux, and is given by: For a given voice coil, all parameters are fixed except the current. Therefore, the force generated is directly proportional to the input current.

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.