To choose the best power harrow, consider the tines, roller type, optional components, tine drive mechanism, and frame construction. The tines are the main component and should be made of forged steel. A gear drive system is better than a sprocket and chain system. The best harrows have interchangeable roller/packer attachments and a strengthened frame […]
Power system harmonics occur when electronic devices draw energy in short pulses, causing distorted voltages and negative effects on system performance. Non-linear loads, such as devices with solid-state switching power supplies, produce harmonic current. Engineers use various methods to reduce harmonics, including efficient designs and isolation and delta-delta transformers. Power system harmonics are the by-products […]
Electronic devices such as computers and variable frequency drives cause power system harmonics, resulting in distorted voltages and negative effects on system performance. Non-linear loads produce harmonic current, causing equipment to operate erratically and power system inefficiencies. Engineers use various methods to reduce harmonics, including efficient designs and isolation transformers. Power system harmonics are the […]
A power rectifier transforms AC power into DC power for small household devices. It can be a single diode for half-wave rectification or a diode bridge for full-wave rectification. A smoothing circuit or filter is needed to produce a stable DC signal. A power rectifier is a device used to transform alternating current (AC) into […]
Electric brakes use a master cylinder and electric brake booster to exert more force on brake pads or shoes than the driver can. Brake fluid is pumped through tubes to each wheel, causing pistons and calipers to exert force on the brakes. The electric brake booster also serves as a backup system in the event […]
Power distribution units (PDUs) manage power distribution to multiple devices, ensuring essential equipment receives sufficient power. There are two types: rack-based and heavy floor-mounted. Remote management is increasingly common for ease of access and safety in emergency situations. A power distribution unit (PDU) is a form of equipment used to manage the allocation and distribution […]
Power windows are car windows that are raised and lowered by a motor controlled by a switch, replacing the old crank style. They were first introduced by Packard in the 1940s and have become a standard feature, with additional convenience features such as one-touch open, lockout switches, and “courtesy ignition.” A power window is a […]
Power tools are available for various tasks, including yard work, home improvement, and crafting. They increase productivity and prevent injuries. Examples include electric lawn mowers, hedge trimmers, and sanders. They can also be used for plumbing and painting tasks. Power tools, along with those that get their power from compressed air or a petrol engine, […]
A power transporter is a transportation system that uses non-human energy, such as electricity, wind, or water power. It typically consists of a belt wound around rollers, some of which are connected to a motor. The belts are made of composite materials and the rollers are either idle or active with a textured outer surface […]
Hotel power is electricity generated on a train or ship for non-propulsion purposes, such as lighting and heating. It can be controlled independently from propulsion power and is critical for passenger comfort and safety. Companies specialize in building and maintaining these power systems. Hotel power is power generated on a train or ship that is […]
Power factor is a percentage that compares real power to apparent power in a system. Real power is the energy required for work, while apparent power is the power flowing through the system. Other factors, such as backward movement of power, affect the flow of power and efficiency of the system. A high power factor […]
Switching power supplies (SMPS) convert voltage levels efficiently, using transistors and capacitors instead of resistors. They are smaller, lighter, and have a longer service life than linear regulators. SMPS can be used in any application where high efficiency is required, but they are more complex and expensive to manufacture and can produce electromagnetic interference. Computers […]
Over 25 countries have nuclear plants in operation, producing just under 15% of the world’s total energy consumption. The US has the most reactors, followed by France, which produces 77% of its energy from nuclear sources. Japan met 30% of its energy needs through nuclear power before the Fukushima disaster, and now plans to cease […]
The US has the potential to generate four times its energy needs through offshore wind energy, but it remains largely untapped. 26 states have usable winds. Offshore wind energy has potential to meet five times the world’s energy consumption, but some environmental groups are concerned about damage to ecosystems. Denmark and Ireland are among the […]
Coal ash, which contains high levels of lead, arsenic, and mercury, is produced in large quantities by US electricity generation from coal. It should be disposed of in dry, lined containers to avoid health risks, but much of it is deposited in wet ponds, putting surrounding neighborhoods at risk. Nearly half of US electricity in […]
Choose power cords with heavy strands and grounding pins, and consider sealed plugs for humid environments. Cable length, outlets, and amperage are also important factors. A thick cord is better than a thin one, and brightly colored cords reduce accidents on construction sites. When trying to choose the best power cord for any application, you […]
10% of US electricity comes from decommissioned Russian nuclear bombs converted from HEU to LEU as part of the Megaton to Megawatt Program. The program costs $20 billion and has converted 862,000 pounds of HEU into 25 million pounds of LEU, equivalent to destroying 15,633 nuclear weapons. 10% of the electricity used in the United […]
The Three Gorges Dam in China is the world’s largest power plant, producing 18.3 GW in 2009 and expected to reach 22.5 GW in 2011. It has displaced over 1 million people and caused environmental concerns. The previous largest power plant was the Itaipu Dam on the Paraná River, which can produce up to 17.6 […]
Power system automation involves intelligent electronic devices that collect and transmit energy data. It can be used for conventional and renewable energy, and includes fault detectors, load-disconnect switches, and smart grids. Benefits include reduced costs and fewer outages. Smart meters monitor energy usage and can reduce costs through off-peak usage. Power system automation generally involves […]
Power wheelchair accessories include bags, batteries, cushions, cup holders, covers, lifts, ramps, and tire/wheel replacements. Cushions can be made of gel, memory foam, or sheepskin. Gel batteries and portable chargers are popular. Power wheelchair accessories are products designed for use with a powered wheelchair and may include a wheelchair bag, power wheelchair batteries, or wheelchair […]
