The ever-growing demand for electric motors can be attributed to several factors including the growing interest in eco-friendly and fuel-efficient motors and improved living standards in a number of densely-populated countries around the world. Plus, new innovations in home appliances are not only driving the demand for electric motors, it’s changing the way they are shaped, sized and put together.

So, how exactly do electric motors work?

An electric motor is in pretty much every electronic appliance. The motor is what turns electricity into mechanical movement. When an electric motor is charged with electricity, the axle, or metal rod turns and creates movement. The motor itself is powered by two opposing magnets – the permanent magnet and the electromagnet. When electric current is applied to the electromagnet, it pushes against the permanent magnet creating rotary or linear movement.

The inside of an electric motor. (Source: Stiavelli)

Many parts of electric motors are made of electrical steel, including the motor core. Electrical steel is an alloy of iron and silicon and can generate various magnetic properties. High-quality electric steel such as POSCO’s Hyper NO will have a small hysteresis curve that minimizes energy loss. POSCO’s technology also reduces core loss by 5 percent as well as motor noise by 5dB.

Electric Motors in Home Appliances

Home appliances currently account for about a third of total energy consumption and attribute to 45 percent of greenhouse gas emissions in an average household. Energy-efficient home appliances are in high demand due to increasingly stricter environmental regulations, consumers’ desire to save on utility bills as well as their desire to lower noise output from appliances such as dishwashers and dryers.

In order to maximize energy efficiency, engineers and manufacturers turn to high quality non-oriented electrical steel such as POSCO’s Hyper NO to meet consumer needs.

SEE ALSO: Why Electrical Steel Can Make All The Difference In EV Motors

Next Generation of Home Appliances

Aside from traditional home appliances, there is a growing number of innovative, next-generation home appliances that rely on high-quality electric motors for maximum efficiency, cost effectiveness and also range of movement.

These days, robots are part of the average household in the form of vacuums, personal home assistants, alarm clocks and more. Unlike traditional home appliances such as refrigerators and washing machines that are stationary, innovative robot appliances move in different directions. This is where actuators come in. Actuators are electric motors in a gearbox, and the gearbox essentially gives electric motors added torque, or rotational force, that allows the robot to move in a variety of directions, including twisting and turning.

Actuators are what propels a variety of movement in robots. (Source: Motion Control Tips)

Moreover, engineers are now working with modular actuators to build robotic structures for a greater range of movement, speed and positions through segmented parts. Highly efficient, relatively low-cost and diverse actuators are coming together with AI sensors, voice recognition and smart controllers to breed a new generations of home appliances.

There are 3 different types of actuators based on how they are powered, and electrical actuators are most commonly found in home applications. Compared to the other types of actuators, electric actuators have lower speed and power, but are easy to install and control. Because they are often modular and can be applied for customized purposes, the resulting robots have a great range of motion to fit the new roles home robots are taking on.

Examples of Applications in the home

Here are some of the latest robots for the home that require advanced electric actuators and are changing the way people think of home appliances.

Aeolus Bot

The prototype for the Aeolus Bot was introduced at this year’s Consumer Electronics Show (CES) in Las Vegas. The robot can move around the nooks and crannies of the home learning different objects and places with its smart software. It can also retrieve different objects and clean the house using other home appliances.

The Aeolus Bot responds to voice commands. (Source: Unbox Holics)

Not only that, Aeolus also has Amazon’s Alexa software, recognize its owner’s face and can alert family members of any disturbances.

Sony Aibo

Sony’s Aibo looks and moves like a dog. With its voice recognition software it can respond to commands, recognize faces and perform tricks. Although the furless bot may not be able to swim or jump the fence, it can pick up a objects, sit, roll over and move much more dynamically than other home robots.

The Sony Aibo can do simple tricks on command. (Source: The Verge)

The changing face (and shape) of home appliances is putting actuators to full use with their wide range of movement, speed and positions. Highly-efficient electric motors and actuators will continue to be in high demand as new innovations in home appliances and robots keep rolling out.

Cover photo courtesy of GE Reports.

So, what happened to the EVs of the past, and how can the world prevent them from going the way of the dodo bird for yet a second time in history?

The Golden Age of Electric Vehicles

The first EV hybrid car was made in 1901 by Ferdinand Porsche, and by 1917, 38 percent of the cars on US roads were EVs, 40 percent were steam-powered cars and the remaining 22 percent were gasoline-fueled.

Porsche recreated the Semper Vivus, the first hybrid EV made by Ferdinand Porsche. (Source: Super Street)

At the time, horse-drawn carriages were the norm, and people were desperate to solve the “pollution problem,” meaning pollution in the form of horse droppings. Even then, EVs were seen as the solution for a clean environment, and from 1895 to 1920, 50 companies were producing EVs. However, gasoline-powered vehicles were also a viable option and increased in number along with EVs as more highways were built and people and goods started to travel greater distances.

A woman cranks her car on the streets of New York in 1923. (Source: Pinterest)

EVs had an initial advantage over gasoline cars for several reasons. They were more environmentally friendly, or the exhaust didn’t give off an awful smell, were less noisy and easier to drive. The shortcomings of gasoline cars also played a factor. Gasoline cars had to be started manually, or “cranked,” every time, making them laborsome and even dangerous to drive. Although they had better range, gasoline cars also broke down more often. The tables quickly turned.

SEE ALSO: Why Electrical Steel Can Make All The Difference In EV Motors

The Rise of Gasoline and Ford

The company that led the rise and dominance of gasoline cars was Ford and its Model T vehicles that sold for USD 650 versus EVs that sold for around USD 3000. When Ford mastered mass production with assembly lines, the company turned out 1,670,000 vehicles in 1923.

Ford’s Model T sold in the 1920s pioneered the normalization of gasoline cars.(Source: Think Link)

Another key turning point for gasoline cars was when Charles Kettering invented the electric ignition in 1915. Drivers no longer had to start their cars manually, one of the reasons gasoline cars were not popular, especially among women.

As more highways were built, there was a demand for greater range that EVs just could not meet, especially when gas stations were cheaper to build than charging stations. Plus, there was no standardized plug for different EV models. Later on, when gasoline cars came equipped with exhaust-control devices that reduced the amount of harmful emissions, people were sold and EVs could no longer compete. EVs made a short resurgence back in the 1970s due to the global oil crisis, but by the 1980s, EVs were almost obsolete.

Back to the Future

Today, it seems as if history is repeating itself. There is a sense of urgency worldwide to tackle the pollution problem – except this time it’s not horse droppings.

In ten years between 2005 and 2015, the number of EVs went from hundreds to a million. Then, in 2016, there was a 60 percent increase in the global number of EVs, and the numbers are projected to grow exponentially. Many countries are backing the switch to electric fuel through tighter regulations on emissions and even completely banning gasoline and/or diesel cars.

Many countries around the world are now banning gasoline and diesel-fueled cars. (Source: Quartz)

Despite the rapid growth, EVs still make up just 1 percent of the global fleet of cars. According to the International Energy Agency (IEA), there need to be 150 million EVs by 2030 and 1 billion by 2050 to contain global warming within 2 degrees Celsius.

For widespread EV adoption, manufacturers, suppliers and policymakers alike can pick up some hints from the past.

SEE ALSO: Ask an Expert: Electric Vehicles and the Future of the Automotive Market

Takeaways

EV manufacturers of the past and present have not found a cure for drivers’ range anxiety. It’s a scenario that likely crosses the mind of any driver considering an EV; running out of juice with no charging station in sight.

A study by MIT shows that range anxiety is irrational because most people drive just 45 miles a day, well under the range of today’s EVs.

The range of today’s EVs. (Source: Vox)

A well-organized charging infrastructure is vital not only for drivers with range anxiety, but also for car companies and those in the charging business. Charging equipment is costly and stakeholders need to know there will be enough demand to make a return on their investment, but drivers are more likely to make the switch after a charging ecosystem matures. The dilemma calls for a collaborative effort among automakers, policymakers and companies like POSCO.

POSCO ICT’s ChargEV

POSCO ICT is an IT and engineering company looking to relieve range anxiety and take a holistic approach to establishing a charging infrastructure in Korea for a greener future. In partnership with various automakers, businesses and the government, POSCO ICT set up more than 300 charging stations in Korea and oversees many more private charging stations within its network.

There are over 300 POSCO ICT ChargEV stations in Korea. (Source: POSCO ICT)

The charging ecosystem is run through an app called ChargEV where drivers can sign up to get real-time information about charging locations, make reservations and even pay for charges. ChargEV is also a platform for customer support and reporting accidents. In addition, partner companies such as shopping centers and hotels that are now equipped with charging stations stand to benefit from the EV network.

EVs are, once again, a major disruptive factor in the automotive market and the future of private transportation. This time around, the stakes are much higher than pungent streets. As more countries and companies commit to reducing harmful emissions, the number of EVs will likely continue to spike. However, if stakeholders can learn a thing or two from the past, it’s that establishing a holistic charging ecosystem will have as much of an impact on EV adoption as the technological advancements of the vehicles themselves.

Cover photo courtesy of SCMP

POSCO hosted the 2017 Global EV Materials Forum at the Songdo Global R&D Center in Incheon.

POSCO welcomed more than 380 local and overseas customers to the forum where they announced the current status of POSCO Group’s EV projects and strategies. The company also showcased its core EV technologies for high-value-added products such as motors, batteries and lightweight chassis/bodies.

During the forum, POSCO highlighted customer needs, market trends and development statuses in three areas: lightweight materials, traction motor cores and batteries. POSCO researchers also gave presentations on POSCO’s high-value-added products and solutions to share market insights and technological developments with the participants.

Participants listen to presentations at the 2017 Global EV Materials Forum.

In his keynote speech, In-hwan Oh, president of POSCO, said, “POSCO is in full preparation for the future of an electric vehicle ecosystem, to become a reliable partner to our customers.”

There were also external speakers at the forum, including Stephen Zoepf, Executive Director of the Center for Automotive Research at Stanford University, who spoke about “Electric Vehicles: Adapting to a Changing Marketplace.” Another external speaker was Martin Woehrle, senior director of BMW Korea, who gave a presentation on the trends in EV development.

In addition, POSCO held a separate exhibition at the venue consisting of four key product zones: motors, batteries, light-weight chassis/bodies and charging infrastructure. There was also an EV model on display in the Highlight Zone for a better understanding of the structure of EVs.

Visitors examine the electric Nissan Leaf

On display In the lightweight chassis/bodies exhibition zone was POSCO GIGA STEEL for lightweight chassis/bodies, which is lighter but much stronger than existing automotive steel sheets. Also on display was POSCO’s lithium materials for EV batteries; POSCO is the first company in Korea to commercially produce lithium for EV batteries.

In the motor zone was POSCO Daewoo’s a high-efficiency traction motor core for EVs made with POSCO’s Hyper NO, its highest-grade, non-oriented electrical steel. POSCO is already supplying it to major automakers.

The charging infrastructure zone showed POSCO ESM and POSCO Chemtech’s core materials of EV batteries, such as cathode and anode materials. In addition, POSCO ICT is the only company in Korea to provide a total-service electric vehicle charging infrastructure, including supply, installation and operation to membership management and supplementary services.

To close, POSCO pledged to become a “Total Solution Provider” for its partners in the auto industry bracing for the age of electric vehicles with its innovative technology, premium products and customized services.

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Electrical Steel is used to make electric motors for EVs. (Source: Wonderful Engineering)

According to Markets and Markets, the market for electrical steel is projected to expand from USD 27.84 billion in 2016 to USD 38.98 billion by 2021, at a compound annual growth rate (CAGR) of 7 percent. Electrical steels go through various demanding production processes such as annealing, hot and cold rolling and insulation coating. Having the most advanced production technology is paramount, and choosing the best quality electrical steel will determine the overall performance and efficiency of EVs.

What is Electrical Steel?

Electrical steel, also known as silicon steel, is a steel alloy of iron and silicon used to make the cores of motors, transformers and generators.  This softer type of steel can generate various magnetic properties, has high permeability and low amounts of core loss. It has a small hysteresis curve, meaning reduced magnetic hysteresis as well as iron losses, or energy loss.

There are two kinds of structures for electrical steel; grain-oriented and non-oriented.

Grain-oriented electrical steel sheets are most commonly applied to transformers. (Source: Nikomag)

Grain-oriented electrical steel has a uniform, consistent direction of grains in its structure which allows for greater flux density and magnetic saturation. Most commonly, grain-oriented electrical steel is used for transformers which have a predictable and specific magnetic field direction.

Non-oriented electrical steel plates are traditionally welded together to form electrical motors. (Source: LHD Motor)

A major factor that determines the quality of electrical steel is minimal core loss. Due to the constant change in direction of the magnetic field, the energy that is created can easily be lost in the form of heat. Core loss reduction has to be achieved through high-quality electrical steels that have high flux density and lower levels of core losses.

POSCO’s Hyper NO

POSCO is one of a growing number of companies dedicated to doing its part in creating an environmentally sustainable future. That’s why POSCO has been developing its premium non-oriented electrical steel to provide partners with material solutions for EVs.

Take a look at the video below to see how Hyper NO can increase the performance and efficiency of electric vehicles.

POSCO’s Hyper NO is processed using innovative methods such as the self-bonding technology which replaces traditional welding procedures to improve the core’s bonding force. POSCO also managed to reduce core loss by 5 percent compared to traditional types of non-oriented electrical steel and reduce the motor noise by 5dB with its rolling technology that can process the Hyper NO down to an ultra-thin form of 0/15mm. These technologies, along with the Hyper NO’s high magnetic flux density will increase the efficiency of the motor and improve the overall performance vehicles to which it is applied. Hyper NO is highly sought after by automakers looking for premium-grade electrical steel to apply to their EV motors.    

In February 2017, POSCO expanded its production facilities at Pohang Steel Works to increase its annual production capacity of electrical steel from 80,000 tons to 160,000 tons, enough to produce 2.6 million motors for EVs. The strategic move is in line with POSCO’s commitment towards expanding environmentally-friendly businesses as well as its solution marketing efforts to provide customized material solutions to its partners.