Those of you familiar with the industry will know that the first electric drive systems on the market were DC powered. Even though brushless AC motors have largely replaced them over time, there is most definitely still a need for DC drives in industry.
AC drives are used particularly in small-scale output (the opposite of [...]
DC drives fulfill the role of an interface between a controller and the DC motor. It is important that the DC drive match the control signals (voltage and power levels) as well as the signal type (analog or digital). The DC drive is responsible for producing power conversion, amplification, and sequencing of waveform signals. Types [...]
DC drives are utilised in a variety of both commercial and industrial applications, which include processes such as rolling mills, printing presses, and elevators. When operating as it is supposed to, DC drives not only use energy more efficiently, but also provide better process controllability than their electromechanical counterparts. DC drives are known to present [...]
DC drives are made up of an SCR (Silicon Controlled Rectifier) bridge that is responsible for converting incoming three or single-phase AC volts to DC volts. This conversion process makes it possible for DC drives to regulate speed, torque, voltage and current conditions of the DC motor. This is perfect for industrial processes like paper [...]
As technology tends to improve by the minute nowadays, people are inclined to totally write off some of the earlier products used. One such a product is the DC drive. Some so-called experts in the industry have been predicting the death of DC drives for years now. However, this does not seem to be the [...]
It will come as an interesting fact for those unfamiliar with variable frequency drives that the first electric motors available on the market were designed and built for operation from direct current power. As such DC motors have been available for nearly 100 years. However, AC motors have surpassed DC motors as the preferred motor [...]
AC and DC electric motors were seen as the muscle of the industrial revolution. Ironically, these electric motors are now also regarded as the smart muscle of the computer-controlled plant and commercial facility of the future. The advent of powerful, reliable AC drives and DC drives is keeping AC motors and DC motors in the [...]
AC drive and DC drive systems are basically constructed of three basic components. These are the rectifier, the inverter, and a set of controls. The rectifier converts the fixed frequency AC input voltage to DC while the inverter switches the rectified DC voltage to an adjustable frequency AC output voltage. If desired, the inverter also [...]
Both industrial and commercial businesses make use of AC drive and DC drive systems Â
for a variety of applications. Some of the more common applications include blowers, fans, and pumps. Newer applications include textile-fiber spinning machines, machine tools, extruders, hoists and cranes conveyors, and film lines.  Â
Due to the fact that many applications have unique characteristics [...]
When compared to DC drives, AC drives cause very few problems. However, poorly designed applications do sometimes result in power line voltage distortions. These voltage distortions can also cause problems for other equipment connected to the same power lines, subsequently resulting in erratic operation of controls, dimming of lights, and overheating motors operating across the [...]
