motors and drives

motors and drives 

DC Motor Drives
If you own or manage a company that uses DC motors, then you might be in need of DC motor drives at some point in the future. But perhaps you're wondering how these drives work and how they actually benefit a company or organization that uses these types of motors.

DC Motor Drives

What is a DC Drive?

This is a motor control mechanism that's engineered to control speed and torque on a heavy-duty motor as well as PID control, tension control and numerous other applications. DC drives work as a go-between interface between the motor and controller. The drive must match the motor's control signals (power/voltage levels) and also the signal, whether it be an analog or digital signal.

Types of DC Motor Drives

There are various types of drives, so you must choose carefully before purchasing. Common types include variable speed (adjustable) control, integral motion control, regenerative (regen) drives, nonregenerative drives, servo control, etc. Some drives offer the option for either adjustable or variable speed control from one main drive.

Purpose for DC Drives

Purpose for DC Drives

Although DC motors used in industrial settings are generally small, they can be quite powerful. They are easily controlled by DC drives, but without the appropriate drive, the motor will overwork itself and possibly become damaged. In heavy-duty motor environments, control must be maintained using a controller and feedback. A well balanced motor setup can help a company save time and money due to smoother operations, less time spent on maintenance and prolonging the life of the motor.

Important Functions

Some crucial functions of DC drives include torque control, current control, position feedback, loop control, speed control, PID control, web/tension control, extruder control, SCR controls, dancer control, printing, wire drawing, etc. Some manufacturers, such as Carotron, Inc., specialize in retrofit DC drives. The word retrofit also means replacement or properly fitted drives for obsolete motor drives. Older DC motors that are still in great condition will eventually need a new drive. But unfortunately, many manufacturers around the world are dropping DC drive production from their lines. So engineers that specialize in this area can help companies that don't want to replace their older DC motors. By simply removing and replacing the drive with a new, retrofit DC drive, the company can potentially save thousands of dollars in costs and labor down time!

Buying a DC Motor Drive?

Before buying a DC drive, contact the manufacturer or distributor and speak with a qualified engineer about your application needs. If you need help with troubleshooting, some companies have engineers on-hand to help with your issues. Also, use the web to research various drives and find what you need. Manufacturing websites may offer brochures, instruction manuals, and web pages with details such as specifications, features, model ratings and dimensions, connections, application examples, and more.
Article Source: motors and drives

variable frequency drives

variable frequency drives

Variable Frequency Drives help to save electrical energy in mechanical machines. The drive allows to reduce the power consumption using Insulated Gate Bipolar Transistors (IGBT) as switch to control the frequency and voltage of the output power. VFDs are available in the market for variety of mechanical machines. Typically the AC variable frequency drives are useful in lifts, stamping machines, hoists, cranes, and automation applications in the industries.

ac variable frequency drives

ac variable frequency drives

LGIS (LG Industrial Systems) is a renowned manufacturer of the VFDs. The LG 1ph Starvert IG series drives suits the industrial and commercial lifts. The drives are compact, have easy installation mounts. Also the drives are suitable for low budget applications where the control panel uses micro-controllers as the processing units.

DC variable frequency drives

The drives also give a flexible interface to a number of programmable logic controllers (PLCs) in the market. All you need is a programmed PLC and the communication cable that connects the two electronic devices. Usually the cable is RS485 compatible.

The DC variable frequency drives helps to reduce the mechanical jerks because of acceleration at the start and stop of the lift. The change in acceleration is spread over two speeds: low and high. Two proximity sensors limit the physical travel of the lift between the start point and stop point near the halts in this travel. At start,the speed of the lift is slow for about 30% of the travel near the stop point of the lift. The high speed covers the remaining 70% travel.The lift mechanic installs these sensors near the door of the lift.

The interfacing of the drive with the control panel of the lift is easy, three connections for slow speed, fast speed, and brake operation are necessary.Also a common electronic earth connects the drive and the control panel.

The drive connects between the 1ph 220V electrical power supply and the 1ph electrical motor. The drive acts as an electrical switch to control the power supply to machine to achieve different speeds. The drive varies the frequency and voltage of the power supply to the electrical machine, thus increases the torque at starts of the motor. The modified torque gives additional advantage at start of the motor with increased load capacity.


Article Source: variable frequency drives

CN stand Pile 71 HD

www.resonancetechnology.ca ramming movies with the RD140 in Vancouver, BC. guide resonance has long been "outstanding" by vibratory methods of threshing. So far has not led other device manufacturer has to make a machine capable of resonance frequencies in a market cluster. In essence it was a "technically impossible", until now ... Resonance frequencies are those that assume a solid body, of course, excited during the relaxation from an excited state of aState. The lowest frequency at which a freely vibrating body is called natural or fundamental frequency. Other resonant frequencies are called harmonics or tones. A driver "RTI" resonance can be operated only on the stack or the natural harmonic frequency. You need to forget much of what we know using a conventional vibratory pile driver RTI resonant. The situation is completely different and works in some areas. ** In contrast to conventional vibratory hammers, no amount of massStock in the choice of the size of the equipment for the job. The answer does not see a group of hammer mass, when the response post. ** The biggest driver of response RTI always feasible, could be used on micro-stakes. In contrast to the imbalance vibrations (where violence can not be altered), adjust all the products under RTI independent of frequency. ** There is no insulation between the hammer and crane. They are not necessary. For this reason, there are isolated to overheat when you pull into a pile. A...



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AuCom MVX video.mov

MVX new medium-voltage products from starter AuCom Electronics Ltd.



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Gecko Hot Tub Accessories

Gecko Alliance, a Canadian company are experts in the field of production equipment, world class spa and bath industry. They have unique characteristics such as Propak Whirlpool has an automatic time-out. E 'equipped with a sensor fault detection and management of ozone. It has an air duct cleaning and filter cycle program to start and has a function of antifreeze. It has a reasonable warranty repairs and corrections are made byCompanies.

The 'clear' is another product Gecko for the hot tub, a system of sewage disposal, either horizontally or vertically installed brought with its waterproof housing. It destroys all water borne bacteria, chemicals and matter organs of the body given by the swimmers and help stem the spread of the disease. sanitizer This feature eliminates the need for the use of additional chemicals to clean water.

For therapeutic baths, is variablejet velocity of air traffic control systems, air heaters, controls, Sleep timer, etc., provide all the features of a whirlpool system. high efficiency fans are also hot tub with optional heater, silencer and heat shield for heating and motor available.

Gecko water level sensors to prevent the operation of the system when the water is below the desired amount, can also be installed in hot tubs.

There are elements that the correct temperature can be maintained soExpand your experience of bathing. A keyboard is also provided to more user-friendly operation of the stove. It can also be tailored to specific needs.

Last but not least there are waterproof, iPod, CD, DVD and MP3 players that can be used and installed, as well as hot tubs and spas.

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magnetic standing wave around two magnets, variable speed drive oscillates with two little "balance" on the frequency of magnet Schumann on one side and a frequency on the opposite side. The difference between the results of the two frequencies in frequency, which, if made through electrogravitational circumfrerence quantum magnet disc minimum rate proposed theory multiplied by the square root of the fine structure constant in meters per second units. Displays in the form of macroscopic quantumEntanglement and non-equal split of a magnet system (2-element).



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A complete overview of electrical transformers

A voltage transformer is changed from one value to another, or value added. The transformers are connected to two series of coils and windings with a magnetic field. The coils are of two types, which are primary and secondary education as their leader.

During the working life of an electronic transformer, the primary coil is alternating current, which constructs a variable magnetic field of tension near the ladder. The primary coil reactsvariable flow of alternating current. The magnetic field is transformed to the edge of the secondary coil. Following the change in voltage transformers and relocation of electricity, preferably with the least amount of energy loss.

The sum of the turns in each coil is significant because these are the voltage is below the primary to secondary education, a way of controlling the magnetic field. The number of turns or circles in the primary coilNumber of secondary coil in turn determines the amount of tension. The core is generally made of iron, as this creates a magnetic coil well-organized. Once the tension adjustment is completed, the power to transfer the center of gravity and the electrical process works from there.

transformers can also plate elements from other circuits. Transformers can be as large as the ones we see are appropriate in the region of power lines or smalloff used in household appliances. Transformers can also give the circumstances as the exchange of power where there is a dissimilarity terminal voltage of an electronic device or machine and power supply. There is a need for AC power systems are growing or not the voltage for the efficacy and safety. Transformers required for this special show, because their method is based on the changing powerAC.

The internal power transformers is an important factor. The three frequencies are generally available 50 Hz, 60 Hz, 400 Hz power is the European average of 50 Hz at the same time as in North America power more often than 60Hz. The 400 Hz is set aside for high-function, such as air and space technologies. It is also significant for the least amount of specific energy requirement, while the processors estimate.

Moreto remember the details, are in the range of a power transformer: the highest ratings of others, secondary current and voltage, the power and productivity evaluation. Power transformers have a variety of configurations to segment and link. The most common single and three phase. Both the size and cost of electrical transformers to add the amount of the number of primary windings.

Transformers used to intensify or inductance voltage step-down.The transformers are the main reason that the power transmission and the house to use the sockets discontinuous. This is the reason for processors that allow for the change in voltage, which reconciles resources worldwide, with high stress and low costs to be transferred.