Electric motors power everything from tiny electronics to massive industrial pumps. Yet, they all work on the same basic principles. Though AC motors seem ordinary, there are complex activities going on behind the scenes.

The simplest types of motors are three-phase AC motors. They convert a rotating magnetic field into mechanical rotation. The basic parts of an AC motor are the stator, rotor, bearings, drive shaft, and frame. The supply power is connected to coils of wire that are wrapped around laminated iron cores in the stator; the stationary part of the motor. When the coils of wire receive current, they generate a magnetic field known as poles. Each phase of power has the same number of poles; the poles are spaced evenly around the stator.

Historically, speed control of three-phase induction motors was very difficult. The only way to change the operational speed is to change the frequency of electricity supplied. Today, this task is accomplished by use of a variable frequency drive or VFD. This device is made of three main components: a rectifier, a DC-Link, and an inverter. The rectifier takes the incoming AC voltage and converts it to DC voltage that can be used by the electronics in the VFD. The DC-Link then uses capacitors to help smooth out the DC voltage from the rectifier and feeds it to the inverter.

The inverter then converts the DC voltage back to AC voltage. The inverter also controls the output frequency of the AC power by sending precisely timed pulses of DC power at specific voltages to rebuild the AC sine wave.

With a VFD, not only can the output frequency be controlled, but it can be slowly ramped up. This allows for smoother starting and can be adjusted to keep a motor spinning at a specific frequency. VFDs can produce three-phase power from a single-phase source, or even a DC source, to power highly efficient three-phase motors in locations without a three-phase supply. VFDs can also be incorporated into a PLC system to allow for automatic or remote control.

The combination of a VFD and AC motors offers a wide variety of functions and increased efficiency. Basic understanding of these technologies is essential for any electrician.

Home fires devastate hundreds of thousands of families each year. In 2015 alone, there were 1,345,000 fires reported in the United States, resulting in over 3,000 deaths and 15,000 injuries. Among the most common causes of fires are kitchen stoves, faulty wiring, lighting, clothes dryers, and candles. Monday marked the beginning of National Fire Prevention Week, and because we’re committed to ensuring the safety and peace of mind of home homeowners, we’re going to spend this week helping you safeguard your home against a possible fire.

It’s essential to note that you can’t prevent 100 percent of fires; however, there are certain measures you can take to significantly reduce the possibility of one. The most important thing you can do as a homeowner is always be proactive and vigilant. We’ve put together what we believe to be the most important tips you can follow for fire prevention.

You have probably become so used to smoke alarms you rarely even notice they are in a room. That means you don’t notice when they are not around either. Or if they are working properly or placed in an appropriate place. Smoke alarms are one of those things that we ignore until we burn toast and remember we have them. Then they become an annoyance and the batteries are popped out with the intention of replacing them once the smoke has cleared out. Unfortunately, because they are so easily forgotten, they are often not replaced. An electrician in Glendale, like those at The Electric Connection, has a few facts to tell you about smoke alarms. These facts remind us why those little white discs in the corner are so important.

1-Smoke alarms need to be replaced every ten years. Most people assume they are good forever.

2-30 percent of home fires are in homes that have expired smoke alarms or no smoke alarms at all.

3-It is imperative you test your smoke alarm every month. A Glendale electrician points out it takes less than a minute to complete this potentially life-saving task.

4-Batteries should be replaced in each smoke alarm every 6 months, regardless if they are working. Fresh batteries are best.

5-Opting to go with at least one hard-wired smoke alarm on each floor is a good option. These will be installed by an electrician. Glendale homeowners can rest assured they will always have protection whether the batteries are fresh or not.

6-Every bedroom in the house should have a smoke alarm. A smoke alarm should be on each floor as well. 66 percent of homes do not have the minimum number of smoke alarms recommended.

If you would like to add another layer of protection and have hard-wired smoke alarms installed, give The Electric Connection a call today and schedule your installation.

What is a spotlight? What is a floodlight? Knowing the difference between the two is important for properly lighting any application. Before you can understand the difference, you must know what a beam pattern is. Beam angle or pattern is a measurement of the angles that are formed between a cone of light’s brightest point (the center) and the points on both sides of the center where the light’s intensity is 50 percent as bright.

PAR30 bulb that is available with a spot or flood beam pattern.

Fixtures, such as retrofit LED can lights may also look similar to one another while functioning as either spotlights or floodlights. Some light bars are even capable of emitting flood, spot, or combination beams. There are, however, certain fixtures that we imagine when we think of floodlights and spotlights.