Energy

NZ to trial world-first commercial long-range, wireless power transmission

NZ to trial world-first commer...
Emrod's wireless power transmission devices can beam large amounts of electrical power between two points, with line of sight between relays the only limit on distance
Emrod's wireless power transmission devices can beam large amounts of electrical power between two points, with line of sight between relays the only limit on distance
View 3 Images
The Emrod team grabbing some wrist, with founder Greg Kushnir front and center
1/3
The Emrod team grabbing some wrist, with founder Greg Kushnir front and center
Emrod's wireless power transmission devices can beam large amounts of electrical power between two points, with line of sight between relays the only limit on distance
2/3
Emrod's wireless power transmission devices can beam large amounts of electrical power between two points, with line of sight between relays the only limit on distance
Crude render of a temporary power transmission truck
3/3
Crude render of a temporary power transmission truck
View gallery - 3 images

A New Zealand-based startup has developed a method of safely and wirelessly transmitting electric power across long distances without the use of copper wire, and is working on implementing it with the country's second-largest power distributor.

The dream of wireless power transmission is far from new; everyone's favorite electrical genius Nikola Tesla once proved he could power light bulbs from more than two miles away with a 140-foot Tesla coil in the 1890s – never mind that in doing so he burned out the dynamo at the local powerplant and plunged the entire town of Colorado Springs into blackout.

Tesla's dream was to place enormous towers all over the world that could transmit power wirelessly to any point on the globe, powering homes, businesses, industries and even giant electric ships on the ocean. Investor J.P. Morgan famously killed the idea with a single question: "where can I put the meter?"

It has taken 120 years, but New Zealand company Emrod appears to have finally convinced a major power distributor to have a crack at going wireless in a commercial capacity. Powerco, the second-biggest distributor in New Zealand, is investing in Emrod, whose technology appears to be able to shift large amounts of electricity much more efficiently, between any two points that can be joined with line-of-sight relays.

"We’re interested to see whether Emrod’s technology can complement the established ways we deliver power," said Powerco’s Network Transformation Manager Nicolas Vessiot. "We envisage using this to deliver electricity in remote places, or across areas with challenging terrain. There’s also potential to use it to keep the lights on for our customers when we’re doing maintenance on our existing infrastructure."

Emrod currently has a working prototype of its device, but will build another for Powerco, with plans to deliver by October, then spend several months in lab testing before moving to a field trial. The prototype device will be capable of delivering "only a few kilowatts" of power, but can easily be scaled up. "We can use the exact same technology to transmit 100 times more power over much longer distances," said Emrod founder and serial entrepreneur Greg Kushnir. "Wireless systems using Emrod technology can transmit any amount of power current wired solutions transmit."

The system uses a transmitting antenna, a series of relays and a receiving rectenna (a rectifying antenna capable of converting microwave energy into electricity). Each of these components appear in these images to simply look like big ol' squares on poles. Its beams use the non-ionizing Industrial, Scientific and Medical band of the radio spectrum, including frequencies commonly used in Wi-Fi and Bluetooth.

Unlike Tesla's globally-accessible free power dream, the power here is beamed directly between specific points, with no radiation around the beam, and a "low power laser safety curtain" immediately shuts down power transmission before any object, like a bird, drone, power thief or helicopter, can touch the main beam. There will be no difficulties this time working out where to place the meter.

Emrod says it works in any atmospheric conditions, including rain, fog and dust, and the distance of transmission is limited only by line of sight between each relay, giving it the potential to transmit power thousands of kilometers, at a fraction of the infrastructure costs, maintenance costs and environmental impact a wired solution imposes.

Indeed, Emrod sees wireless transmission as a key enabling technology for renewable power, which is often generated far from where it's needed. This kind of system could be terrific for getting the products of offshore and remote renewable energy generation into the city grids without the need for giant storage batteries and the like.

Crude render of a temporary power transmission truck
Crude render of a temporary power transmission truck

It'll also be handy in certain unplanned outage events; a truck can be fitted out with a rectenna, and then driven anywhere in visual range of a relay to create a temporary wireless power connection.

The company has been liaising with the Radio Spectrum Management authorities in New Zealand throughout its development process, with a view to meeting every safety standard even once the technology scales right up to high power levels, a process Kushnir says has also helped Emrod develop guidelines for the companies that will be using the technology.

We've contacted Emrod to ask more about efficiency, the size, shape and state of the current prototype, future plans and what indeed would happen if you stuck your hand in the middle of the beam, and will bring you more information when we can.

Update: we have now spoken with Emrod founder Greg Kushnir, who had plenty to share in our interview story.

Source: Emrod

View gallery - 3 images
21 comments
Michael Jaeger
First? Hardly. Over 5 years ago Viziv Technologies in Texas was wireless broadcasting power around the entire globe in small amounts, while they were testing. Today they have built the first surface wave transmitter in Milford, Texas. Microwave emitters and receivers are child's play.
paul314
This sounds most useful for powering installations in hard-to-access areas where running wire or trucking in fuel for a generator is right out, and solar panels are too small or expensive. (Extra cell towers in mountainous areas?) But it will still need a battery back for all the times when the anti-bird-frying circuitry cuts in.
WB
what could go wrong.. 100kw microwave beams... there is a darwin award winner from decades ago up in Alaska with gigantic microwave relays... the guard there used to get close to the antennas because it was nice and warm..but then over the Holidays they amplified the power which he didnt know so his normal distance instantly microwaved him... and making him a winner of that year's darwin award. I wonder what happens when the first low flying military jet gets into this beam... whether the system will be shut down fast enough is yet to see... good luck with that. Also if you are beaming 100s of kw through and the system does a full shut down with every bird that flies through that's quite a spotty performance...
Gizzy Magpie
WB's comment says pretty much everything I wanted to say.
Cryptonoetic
I'd listen to 'WB'. I can hardly wait to read the inevitable studies identifying all sorts of harm to "in range" fauna caused by WPT.
Douglas Bennett Rogers
This sounds like preparation for space based solar. Actually, the beam for space based solar has a much smaller interaction volume per unit power.
john@johnread.com
Nikola Tesla investigated the great pyramid in Egypt as a probable original use power transmission. Many reasons for this, that archaeological findings continue to corroborate. If true (as seems likely), wireless high power electricity in use over 5000 years ago.
CuriousPedant
Geez, it's lucky companies like this are attempting to innovate and push things forward. Judging by the comments here it's all either been done before or has too many insurmountable obstacles so we should all just give up and go home. Looking forward to seeing this up and running.
jerryd
A waste of money as one can't get that narrow a beam at any distance. And saying rain won't hurt microwave transmission is just a lie. If that was true then a bird wouldn't have a problem either as it's the water in it that soaks up the microwaves and why they show up on radar.
Karmudjun
Great article! My thoughts are related to weather disturbances that might create havoc - I understand birds and swirling leaves interfering with line of sight, what about snow or sleet? Will really bad weather or excessive smoke and shear winds created by forest fire thermals affect the performance? I'd hate to imagine a pilot having to fly a jet through such a beam for more than a second or two - my fear would be they could eject into the beam if they were so close to the ground in the first place. But awesome article, including the hype of the 'first' ever moniker.