ultrasonic electric motor

INTRODUCTION

All of us understand that motor can be described as machine which in turn produces or perhaps imparts motion, or in depth it is an arrangement of coils and magnets that turns electric energy in to mechanical strength and ultrasonic motors will be the next generation motor.

In 1980, the world's initial ultrasonic engine was made which utilizes the piezoelectric effect inside the ultrasonic consistency range to supply its driver resulting in a motor unit with abnormally good low speed, high torque and power to fat characteristics.

Electromagnetism has long been the driving force behind electric motor technology. But these engines suffer from many drawbacks. The field of ultrasonic appears to be changing that driving force.

DRAWBACKS OF ELECTROMAGNETIC MOTORS

Electromagnetic motors rely on the attraction and repulsion of magnetic areas for their operation. Without good noise suppression circuitry, their particular noisy electric operation can affect the electric components inside it. Surges and spikes coming from these engines can cause interruption or even damage in nonmotor related items such as CRTs and various kinds of obtaining and sending equipments. Likewise, electromagnetic engines are notorious for consuming high quantity of electricity and creating high normal motor temps. Both are unfavorable from the productivity point of view. Extreme heat strength is squandered as failures. Even the proficiently rated electromagnetic motor has high suggestions to end result energy loss ratios.

Replacing these by ultrasonic motors would virtually eradicate these undesirable effects. The electromagnetic motor produce good magnetic areas which cause interference. Ultrasonic power generators use piezoelectric effect and so no permanent magnet interference.

PRINCIPLE OF OPERATION

PIEZOELECTRIC IMPACT

Various polymers, ceramics and elements are completely polarized; that is some elements of the elements are favorably charged, while other parts are negatively charged. When an electric powered field is definitely applied to these materials, these kinds of polarized substances will line-up themselves while using electric field, resulting in activated dipoles in the molecular or perhaps crystal composition of the materials. Further more a permanently polarized material such as Quartz(SiO2) or perhaps Barium Titanate(BaTiO3) will generate an electric field when the materials changes sizes as a result of a great imposed mechanised force. These types of materials will be piezoelectric and this phenomenon is called Piezoelectric result. Conversely, a great applied electric power field can cause a piezoelectric material to alter dimensions. This really is known as Electrostriction or Reverse piezoelectric effect. Current ultrasonic motor design works from this principle, only in reverse. [pic]

Every time a voltage having a resonance frequency of more than 20KHz is applied to the piezoelectric element of a great elastic body system (a stator), the piezoelectric element extends and legal agreements. If volts is applied, the material curl. The path of the curl depends on the polarity of the used voltage plus the amount of curl is determined by how many volts are applied.

Eg: Quartz, Rochelle salt, Tourmaline, Lead Zirconium Titanate

It therefore does not make use of shelves or magnets. It is a motor unit with a new idea that does not make use of magnetic push as its driving force. It also prevails over the principles of conventional motors. The working principle is based on a traveling say as the driving force. The wave hard disks the brush of the piezoelectric ring. The moment applied, the piezoelectric spines will expand or deal corresponding towards the traveling trend form and the rotor engagement ring which is hard pressed against these types of combs start off rotating.

STRUCTURE

[pic]

Ultrasonic engine construction is often simpler than EM type motors. Fewer assembly parts mean fewer moving parts and consequently much less wear. The number of components necessary to construct an USM can be small...

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