Transformers – Saturation

Transformer saturation distorts the secondary current waveform and the extent of distortion depends on the value of the remaining flux in the CT core and the presence of a DC offset in the primary current. It is common, in transmission lines, to occur situations that generate overcurrent in the circuit. These situations usually lead to […]

Single Phase Induction Motors

The single-phase induction electric motor has a squirrel cage winding rotor and a distributed winding stator and the winding current located in the rotor is current induced, according to Faraday’s induction law. Because it has no starting torque when the stator winding is supplied, the rotor will not rotate. However, if an initial rotation is […]

Corretor de Imóveis

Nas últimas décadas surgiu no Brasil outro tipo de trabalhador, o prestador de serviços. Esta atividade terceirizada tem se ampliado por todos os cantos do território brasileiro, na verdade, essa expansão é universal, pois em todos os países, especialmente os mais desenvolvidos, o profissional liberal, é a atividade prestadora de serviços que mais cresce. Veja […]

Application of Alternating Currents

In the single-phase system, an alternating voltage U, represented by volt, is produced and applied between two wires, where the load is connected, which will suck a current I, represented by the amp. We must indicate some quantities so that the voltage and current waves do not remain in phase, that is, they do not […]

Três passos para conseguir a casa própria

Conheça três passos simples e que, ao mesmo tempo, exigem muita disciplina e esforço da sua parte para conseguir a casa própria em apartamentos em itaquera a venda. Conheça as opções de crédito e financiamento Se você não possui dinheiro para comprar à vista, o que é a realidade da maioria dos brasileiros, então conheça […]

Eleições e Mercado Imobiliário

Engana-se quem pensa que o mercado imobiliário é uma espécie de paquiderme, se movendo muito lentamente em relação as oscilações da economia. Confira abaixo as dicas do condominio swiss park casas a venda. Na verdade, pelos altos valores envolvidos, é um dos primeiros a sentir os efeitos das crises cíclicas e também, um dos últimos a […]

The Stepper Motor

The stepper motor is a motor with precise positioning, so that each electric impulse of the power signal corresponds to a fixed angle of rotation. The stator is made of four poles and the rotor and a permanent magnet and to understand the operation of this motor, we will consider that when energizing the windings, […]

Application of Current Transformers

Calculate the excitation current of a protective CT of 50-5 A, 15kV nominal voltage, operating the nominal current. An overcurrent relay is connected to the secondary of the current transformer, which implies the choice of the nominal load of C100. In the design of the CT was adopted a magnetization of 500 ames-turns. The secondary […]

Benefits of the Permanent Magnet Synchronous Motor

These electric motors that are driven by frequency inverters with NdFeB magnets almost have no Joules losses in the rotor, unlike conventional squirrel cage induction motors. As the Joule losses are an expressive part of the total losses in induction motors, removing the squirrel cage and replacing it with magnets, the synchronous motor guarantees a […]

Press Width Modulation (PWM)

The way in which the inverter performs the frequency variation is called Pulse Width Modulation (PWM), the morally used acronym. We have seen that in practice it is a square wave organized by several variable pulses, but that, in general, competes for a sinusoid. The current pulses are more like a sinusoid, and two transistors […]

The Advantages of Induction Motors

Three-phase induction electric motors have a wide range of advantages, compared to other types of electric motors found in the market, among them, we can emphasize the ease of the performance in the process of cleaning and simplicity of command, its simple construction, with a cost respectfully reduced, and great versatility of adaptation and adhesion […]

The Relays

The relays are very important components of electric charge manipulation, since they guarantee the combination of logic in the control, as well as the separation of the power and command circuits. An important specification of relays is that the voltage of two terminals can be 5Vdc, 12Vdc or 24Vdc while at the same time the […]

The Slip

Slip or slip is fundamentally the difference between the speed of the rotating field and the speed of the rotor. Slip has a direct influence on the frequency of induced electromotive force on the rotor bar. At the moment of starting, or at the instant the rotor is stationary, the slip is maximum, and thus, […]

Maiores erros ao comprar um imóvel

Quer saber quais são os maiores erros ao comprar um imóvel? Descubra quais são com as dicas do condomínio acapulco guarujá e fique longe dessas atitudes! Não adequar o orçamento familiar à nova realidade A aquisição de um bem tão custoso necessita de uma mudança nos hábitos de consumo, algo que muita gente acaba se […]

Vale a pena dividir o aluguel com outras pessoas?

Essa é uma pergunta que muitos jovens e universitários no geral costumam se fazer. Será que vale a pena alugar uma casa maior e dividir o aluguel com outras pessoas? Autoconhecimento é importante para saber se vale a pena dividir o aluguel Você é uma pessoa metódica ou que se irrita fácil? Convive facilmente com […]

Como escolher a banheira ideal para a sua casa

Deseja escolher a banheira certa para ter em casa? Então confira as dicas da imobiliária mogi das cruzes a seguir: Espaço e características da banheira Um fator que é imprescindível é saber exatamente quanto espaço você tem disponível para a instalação da banheira. Já pensou como pode ser frustrante efetuar uma compra e depois descobrir […]

Bearing Bearings with Oil Lubrication

It is extremely important that during storage of the engine, it remains in its original operating position, always keeping the bearings lubricated with a specific oil. The level of this oil should be reelcraft F83050 OLP considered as an extreme limit and should always be respected so that its permanence is in the middle of the […]

Dicas rápidas para fazer a reforma gastando pouco

Quer fazer aquela reforma antes de colocar o seu imóvel na imobiliária São Miguel Pta disponível para venda ou locação? Então confira nossas dicas rápidas para você fazer uma reforma gastando pouco! Planejamento vem antes de tudo É imprescindível que você anote em um caderno ou documento virtual todos os lugares do seu imóvel que […]

SMP- Planned Maintenance System

The Planned Maintenance System consists of instructions, lists and details of tasks and resources required to comply with them, and is a systematic within the scope of preventive maintenance. SMPs cover several procedures necessary to keep the machine and equipment in perfect working order, ie, SMP basically consists of consolidating the preventive maintenance procedures of […]

Como acertar na compra do seu imóvel

Está buscando um imóvel para comprar e tem medo de comprar o errado? Se você acertar na compra do seu imóvel, evitando arrependimentos, veja nossas 4 principais dicas para comprar um imóvel certo: Leia o contrato Ler o contrato é fundamental para que você saiba tudo sobre o imóvel e sobre o processo de compra […]

Como receber famílias com crianças nos imóveis

Já marcou uma visita com seu cliente da imobiliária Mogi das Cruzes e na hora apareceram com ele as crianças? Pois bem se você ainda não passou por esta situação acredite ela ainda virá. Crianças são crianças em qualquer lugar e se não tiver algo que prenda realmente a atenção delas acredite elas vão fazer […]

Construtora precisa saber quem é a sua persona

Depois de definir um planejamento empresarial eficiente, faz-se necessário que sua construtora em Sorocaba defina para qual público consumidor ela pretende oferecer os seus produtos. Isso quer dizer que a sua construtora pode procurar vender os seus imóveis para as pessoas que tem menos recursos, mas para isso, precisará construir classificadas como populares. Ou ainda, […]

Polyphase Alternating Current Synchronous Motor

There are two basic types of electric motors that work with polyphase alternating current, synchronous motors and induction motors. The synchronous motor is basically a three-phase alternator that works in reverse, where the field magnets are arranged on a rotor and excited by direct current, and the armature coils are divided into three parts and […]

Main types in industry

The alternating current components are given different ratings, such as double polarity motors, because they have the capability to operate at two different speeds in relation to their power, and double-spindle motor, which has only one output for each side. DC motors, also called DC motors, perform their functions, basically with the aid of direct […]

Concepts of Electricity and Electricity

The English scholar William Sturgeon made several experiments on the phenomenon of electricity and, taking into account the discovery of the scientist Oersted, was able to conclude approximately in the year 1825 that an iron core inside a wire with electrically conductive properties was perfectly capable of transforming it into a magnet, in the case […]

Relay Operation

Relays should be adjusted from approximately three seconds to thirty minutes with high precision. Being able to vary according to the type of actuation, they can get a delay in the energization, which basically refers to the operation of their keys in a period after their connection, returning them to rest after their shutdown or […]

Thermal Phenolic Components

The thermal protector has a great possibility of application, and in most of them it is done in motors of the three-phase type, however, only in motors with Y connection. The advantages are combination of current and temperature sensitive protector and possibility of automatic reclosing . The disadvantages are the current limitation, because the protector […]

Determination of Properties and Identification

Some machines have a specific seal in their mancalización, being able to protect them against any type of climatic agents that can interfere in its operation. In regard to their constructive form, these machines usually are endowed with three or four figures, since the first letter determines that if the engine conforms to the standards. […]

Power and Mechanical and Electrical Power

Power has as its main function to measure the speed with which energy is consumed or applied. Basically, the energy expended or the labor dispensed to be able to raise an object, for example, will always be the same, however, the power diagnoses the speed with which this energy is applicable to be able to […]

Magnetic field

Polluting gases, such as the carbon dioxide that is normally released from automobile exhaust fumes and from factory chimneys of major industries, have a high ozone depletion potential. The performance of the electric motors is directly based on the principles of electromagnetism, in which the conductors located in a magnetic field and crossed by electric […]

Three Phase Electric Induction Motors

In general, induction machines can also be specified and considered as single operating machines, for some decisive factors, among them, for the reason that only polyphase alternating voltages can be applied to their own stator. Thus, it is important to note that an alternating voltage of variable frequency may be induced in its rotor, in […]

Electric Motors with or without grease fitting?

In electric motors with grease fitting, the relubrication of the bearings will be done with the engine stopped. The first step is to clean the vicinity of the grease inlet, and we should put half the total grease that is recommended, then turn the motor about one minute at the nominal speed. After this step, […]

Auxiliary Phase Single Phase Motor

The auxiliary phase single phase electric motor is the most widely used. Its mechanical part is similar to that of three-phase induction motors. Thus, in the stator there are two windings: one of thicker wire with large number of turns (main winding) and one of narrower wire with few turns (auxiliary winding). The main winding […]

CONTROL OF ELECTRIC MOTORS – Mechanical Protection

Among the main functions of the control of an electric motor we have the item “mechanical protection” that is classified into three categories: drip and splash proof, fully enclosed and explosion proof. Drip and splash proof motor – all rotating parts, or under tension, are protected against dripping water from all directions, not allowing the […]

Electrical Performance, Control and Protection of Engines

The electrical performance of a rotary electric motor is defined by the condition of the rotor and the stator coils. The motor must be protected with alarms and triggers against operating conditions that are not considered normal. This is for electrical or mechanical operations.   Some of these protections when installed allow the machine to […]

Brushed Electric Motor

The Brushless type motor is a brushless DC electric motor with a permanent magnet rotor and unlike a brush motor it does not need to slide the electrical contacts on the rotor shaft to operate. This results in lower mechanical strength, eliminates the risk of sparking with increased rotational speed, and reduces the need for […]

Lower Consumption for Electric Motors

Since 1833, one of the problems encountered in electric motors was the performance he had in relation to the transformation of electrical energy into mechanical. Great strides have been made to achieve this goal, where a machine does this transformation, with less waste of electricity. Research has advanced in this direction and focused on improving […]

Sites to buy electric motor

There are many websites to buy new or used electric motor and with very affordable values. Like any other purchase you need to compare prices on different websites to have knowledge about which one is offering an offer that meets the cost and benefit that you are looking for. Before you begin your search, try […]

How does the electric motor work?

The basic principle for the operation of the electric motor is very simple. The battery provides the electrical energy when the scraped parts of the turn are in contact with the rod or bearing, because an electric circuit occurs where a current will flow through the loop due to the magnetic field that is associated […]