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Did you play with mini 4x4s when you were a kid?

It's that whirlwind charge tornado or something.,It can be said to be a cartoon in the second year of childhood.。

Chen Hao was not less poisoned by this kind of children's program when he was a child, and the commissary at the entrance of the primary school alone swept in and out hundreds of times.

As for those inferior four-wheel drive models that cost dozens of yuan a piece, he also took them home and began to DIY them himself.

Of course, because Chen Hao lived in the countryside when he was a child, most of the four-wheel drive cars he came into contact with were miscellaneous cars imitated by small factories.

High-end 4WD motors such as "Audi Double Diamond, My Partner", which is often advertised on TV, have never been touched.

In Chen Hao's impression, only during the Chinese New Year, when some playmates who live in the city come back, can they see brands such as "Audi Double Diamond" four-wheel drive.

As for the motor speed of those brands of four-wheel drive, it is not comparable to those inferior small motors in the country shops!

Like some [speed of sound], [storm] [speed of light] these models of competitive motors, the speed of speed can reach 7 or 80,000 revolutions per minute, which can be called the super black technology in childhood toys.

Don't underestimate the technological content of this small electric motor!

You must know that in today's new energy vehicles, take the latest P85 motor produced by Tesla, a major brand in the United States, even under overload operation, the speed of this AC motor only reaches 15480 revolutions per minute.

Let's not mention the output power and maximum torque of these motors.

Just from the speed, even an entry-level four-wheel drive small motor can absolutely beat the mature motor on this new energy vehicle.

Of course, the main reason why there is such a big difference between these two motors is that the small motor of the four-wheel drive car uses direct current provided by the battery to work. The motor on new energy vehicles such as Tesla chooses alternating current as the energy source.

Those who have studied junior high school science know that the obvious difference between direct current and alternating current is that in addition to the low voltage, high current and strong output stability, the biggest limitation of direct current is that it is not conducive to long-distance transmission.

Because there is a very high energy loss problem in the transmission process of direct current, so that when using direct current, you need to pay extremely expensive electricity costs.

As for alternating current, it is the exact opposite of direct current, in addition to having the characteristics of frequency conversion, alternating current has extremely low losses in power transportation.

That's why, so many years after the invention of electricity, almost all power plants around the world are using alternators to generate electricity.

As for the household electricity used in our daily life, it is also used in alternating current. The use of direct current in science and technology exists only in a very small range.

However, it is precisely because the DC motor is too niche that Chen Hao wants to amplify the small motor that uses DC on the four-wheel drive car.

After all, with such a high speed stability, it can beat any AC motor on the market in minutes!

Of course, it is not easy to scale the small motor of a four-wheel drive vehicle.

In addition to the use of new manufacturing materials, the metal winding inside the motor and the permanent magnets wrapped on both sides inside the motor are the biggest problems that Chen Hao has to solve now.

"The output power of direct current can be solved immediately. ”

"The output mode of the A-type graphene battery can convert DC and AC power supply modes. ”

"It's this permanent magnet...... This is related to the rare earth industry...... Now that the world is strictly controlling the mining of rare earths, it is almost impossible to build a batch of such enlarged four-wheel drive motors. Chen Hao scratched his head, feeling that his own efforts to build a motor seemed to have become a dead-end road.

As for purchasing a batch of [AC motors] from the market for enhanced use, it is not his most ideal solution. So, after sitting quietly in this secret factory for dozens of minutes, Chen Hao hit the idea on the data system in his head.

"Let's see what black technology is in the item shop!"

"It's been a long time since I've taken gold coins to refresh props, and maybe I've really turned out a few manufacturing processes like [Graphene Battery Technology] and [Electromagnetic Levitation Technology]. Chen Hao touched his chin, and after talking to himself for a while, he simply closed his eyes and entered the data page.

After controlling the gesture mouse, I clicked on the glittering treasure chest-shaped icon at the bottom of the page.

The long-lost checkered shelf reappeared in front of Chen Hao!

"Ding Dong!"

"System: Players are welcome to return to the [Item Shop], there are 23 hours and 09 minutes left until the next item update. ”

"Note: Players can choose between manual and automatic refresh modes, each refresh costs 100 gold and the number of updated items is 16. ”

Looking at the familiar mall interface, Chen Hao moved his mouse to the evil kryptonite button again.

"Ding Dong!"

"System: Players use the system mall to manually refresh the business, deduct 100 gold coins, and update 16 new system items. ”

"The updated items are as follows: [Chicken Doll] [Infinite Mineral Water] [Perpetual Motion Shaver] [Infinite Breeze Paper Pump] ......"

Looking at the new props that appeared on the checkered shelves, Chen Hao's face began to become extremely strange.

“@#%!”

"What kind of bird system props are these, how to refresh them are some daily commodities. ”

"This cheat daddy's black-hearted system clearly wants the money in Lao Tzu's pocket!" Chen Hao cursed a few words in his mouth, and began to click the manual refresh button again.

Fortunately, these 100 gold coins are not a big deal for him who is worth hundreds of billions now.

Within a few minutes, the manual refresh alone was smashed into thousands of clicks, as if you were going to a casino to play that kind of video slot machine, watching the gold coins fall like water.

As for the refreshed props, they are also very strange!

Strange props like [Thor's Hammer], [Water Drops of the Trisolarans] [UFO Propulsion Technology], in addition to the price being so high that even Chen Hao's worth of 100 billion yuan cannot afford it, these special props also need to meet the purchase conditions.

Take [Thor's Hammer] as an example, not to mention the price tag of 200 million gold coins, Chen Hao wants to hold this super weapon that is comparable to the weight of a neutron star, and it actually has to conform to the [Asgardian royal blood] in the Marvel movie.

"I'm an earthling, where are I going to get some kind of fart royal blood?"

Chen Hao couldn't help but complain a few words, while drooling and brushing off these special props that he couldn't afford, while staring at the shelves that kept rolling.

I saw that the 100 gold coins were smashed down, and a new batch of kryptonite props began to appear in the 16 squares.

But this time, the system did not disappoint Chen Hao again!

Because among the 16 new props, a special prop that is similar to a household flashlight made Chen Hao's eyes widen!

"Ding Dong!"

"System: The prop refresh is successful, and the refreshed path in this round has: [Doraemon's magnifying light] ......"