The controller keeps on monitoring the application requirement in a continuous control loop. It then commands the inverter to produce the required voltage and frequency to meet the application requirements. To do this, the controller, comprised of a microprocessor, takes the input signal from the sensor and compares this with a reference signal. It then generates the appropriate control signal for the inverter to vary its output power.

In a typical application, the controller will monitor process parameters such as pressure, flow rate, temperature or liquid level. For example, an oxygen sensor in a boiler provides a signal to adjust the speed of the fan and control the amount of oxygen in the boiler system.

Today’s drives, using microprocessors, semiconductor power switches, and SMDs are now smaller, compact, cheaper, more reliable and efficient. A typical drive will also include a filter to suppress harmonics generated when converting the DC to AC voltage.

Many homeowners assume that electrical fires always happen because of poor wiring within their house's walls. Believing that the fire had nothing to do with their actions. They tend to blame these events on the poor workmanship of those who built the house. However, many homes are consumed by flames that had perfectly adequate electrical systems where the wiring was completely up to code.

One extremely common cause of house fires are deficiencies in the items attached to outlets. Extension cords, for example, can be extremely dangerous to homeowners if they neglect to replace these items after they have exceeded their lifespan. These cords carry currents to secondary locations where they plug in with a remote appliance. If there is a weak connection where the two cords meet, this could mean an electrical current may be exposed, which is perfect fodder for fire. Once the connection between an extension cord and the male end of a cord that attaches to it has weakened, there is little that can be done to repair the damage.

Another issue is a frayed cord, which also exposes electrical currents to potentially flammable materials, like your home's carpeting. Many homeowners think that simply wrapping the exposed wiring in electrical tape is an adequate solution. However, even as a temporary remedy, this tape is insufficient, and will not guarantee adequate protection from exposure.

There is nothing like a do it yourself project.  The satisfaction and reward of a job well done.  However, some projects are better left to the professionals.  Electricity is a powerful source of energy, if not handled properly can be dangerous and even deadly.  All to often we see projects started with good intentions, that end up costing the untrained person more than if they would of had a professional handle the project from the beginning.  Have your home electrical projects handled by licensed professional electricians.