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How does Tesla ‘Ludicrous Speed’ work?

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Following the announcement that Tesla will be releasing a ‘Ludicrous Speed’ upgrade for the dual-motor Model S P85D and upcoming Model X, the natural question emerged: How does Tesla Ludicrous Speed work?

How was Tesla able to extract more acceleration from the already ‘Insane'(ly) quick Model S P85D, and from the same battery back?

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Model S P85D at Tesla’s Los Angeles Service Center

It’s important to first understand that the Model S uses an inverter to convert the transfer of electrons from Tesla’s direct current (DC) battery back to alternating current (AC) of the electric motor. Quoting an analogy provided by ExplainThatStuff, we learn that the electrons work like a line of ants, marching along with packets of electrical energy in the same way that ants carry leaves. The more ants we have, theoretically, the more packets of electrical energy we’ll have.

Citing our friends at TeslaTap, current flowing from the battery passes through a contactor which is a large switch controlled by an electromagnet under software control. The contactor connects the battery pack from connections outside the pack such as to the motor inverter, chargers, etc.

The algorithms within Tesla’s Firmware helps maintain constant torque by controlling the amount of current flowing through the contactors and to the electric motors. Ludicrous Speed adds a safety fuse and a new type of contactor that can safely sustain a current draw of 1,300 amps to 1,500 amps thereby allowing the electric motors to temporarily produce more power, and for a longer duration of time. End result? Mind-shattering acceleration to the tune of 0-60 mph in 2.8 seconds.

 

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>>> RELATED: Specifications for Tesla Model S and Model X Ludicrous Speed

 

Tesla Motors Blog

While working on our goal of making the power train last a million miles, we came up with the idea for an advanced smart fuse for the battery. Instead of a standard fuse that just melts past a certain amperage, requiring a big gap between the normal operating current and max current, we developed a fuse with its own electronics and a tiny lithium-ion battery. It constantly monitors current at the millisecond level and is pyro-actuated to cut power with extreme precision and certainty.

That was combined with upgrading the main pack contactor to use inconel (a high temperature space-grade superalloy) instead of steel, so that it remains springy under the heat of heavy current. The net result is that we can safely increase the max pack output from 1300 to 1500 Amps.

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Tesla to lose 64 Superchargers on New Jersey Turnpike in controversial decision

Tesla is set to lose 64 Superchargers on the extremely busy and congested New Jersey Turnpike.

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Credit: Tesla

Tesla is going to lose 64 Superchargers on the New Jersey Turnpike after a decision by the Turnpike’s governing body was made not to renew its contract with the automaker.

On Friday, Tesla revealed that the New Jersey Turnpike Authority (NJTA) had officially decided to choose a sole third-party provider for its electric vehicle infrastructure. This resulted in the NJTA not renewing its contract to keep Tesla Superchargers on the toll road.

The NJTA also requested, with its decision not to renew with Tesla, that the company decommission all 64 Supercharger stalls, an unprecedented decision that will remove these plugs from the turnpike, making charging more scarce on the busy roadway.

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Tesla detailed the situation on Friday:

“The New Jersey Turnpike Authority (“NJTA”) has chosen a sole third-party charging provider to serve the New Jersey Turnpike and is not allowing us to co-locate. As a result, NJTA requested 64 existing Supercharger stalls on the New Jersey Turnpike to not be renewed and be decommissioned.”

Tesla said it has been preparing for the potential that the Turnpike Authority would make this decision for three years by building 116 Superchargers nearby to still supply drivers with reliable charging infrastructure.

The company also noted that its Trip Planner would adjust automatically.

There were also efforts to maintain a relationship that would benefit both the Turnpike and EV drivers who use it.

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Tesla said it offered the NJTA various “above-market commercial items,” like an offer to build Superchargers at all New Jersey Service Plazas with equipment upgrades like screens and adapters for those companies who have gained access to its charging piles but need to utilize the NACS and CCS1 plugs.

The decision is one that seemed to baffle the company, especially as infrastructure is one of the biggest concerns among EV skeptics:

“Tesla always advocates for more infrastructure and co-location with additional third-party charging providers. This drives down costs through optionality, and accelerates EV adoption by having sufficient capacity to shoulder peaks. We expect that ~30 times more fast-charging capacity is needed to get to full EV adoption. NJTA’s decision to remove, rather than add, critical charging infrastructure is a setback for New Jersey’s EV adoption goals of 100% Zero-Emission New Car Sales by 2035. It removes Turnpike access to the most reliable (99.9% uptime), least congested (<1% waiters) and cost-effective (~30% lower $/kWh) charging. “

The company said it was more than willing to invest in Turnpike sites if the Authority or New Jersey Governor Phil Murphy wanted to reverse the decision.

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SpaceX hit with mishap investigation by FAA for Starship Flight 9

Starship’s ninth test flight has the FAA requiring a mishap investigation from SpaceX.

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Credit: SpaceX

SpaceX has been hit with yet another mishap investigation by the Federal Aviation Administration (FAA) related to the company’s ninth test flight of Starship earlier this week.

The FAA said the mishap investigation is “focused only on the loss of the Starship vehicle, which did not complete its launch or reentry as planned.” The agency said the loss of the Super Heavy booster is covered by one of the FAA’s approved test induced damage exceptions requested by SpaceX.

All of Starship and Super Heavy booster debris landed within the designated hazard areas, the FAA confirmed.

SpaceX Starship Flight 9 recap: objectives & outcomes

It said it activated a Debris Response Area out of an abundance of caution as the booster “experienced its anomaly over the Gulf of America during its flyback toward Texas. The FAA subsequently determined the debris did not fall outside of the hazard area. During the event there were zero departure delays, one flight was diverted, and one airborne flight was held for 24 minutes. ”

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SpaceX has become accustomed to mishap investigations by the FAA, as they have been impacted by them on several occasions in the past, including on Flight 8. However, they are a precautionary measure and usually are resolved within a few weeks.

Flight 9 was one of SpaceX’s most eventful, as there were several discoveries during the launch. First, it was SpaceX’s first time reusing a Super Heavy booster, as the one utilized for Flight 9 was also used on Flight 7 in January.

Contact with the booster and Starship were both lost during Flight 9. SpaceX said the booster was lost “shortly after the start of landing burn when it experienced a rapid unscheduled disassembly approximately 6 minutes after launch.”

Meanwhile, Starship was set to make a splashdown in the Indian Ocean, but the vehicle was lost about 46 minutes into the flight, SpaceX said in a mission recap.

It was an improvement from the previous two flights, as both 7 and 8 resulted in the loss of Starship after just a few minutes. Flight 9 lasted considerably longer. These flights are also not intended to make it to Mars, despite what other reports might try to tell you.

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These are ways to gain information for when SpaceX eventually tries to get Starship to Mars.

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Investor's Corner

Tesla bull writes cautious note on Robotaxi launch: ‘Keep expectations well contained’

Morgan Stanley’s Adam Jonas is more cautious about Tesla’s upcoming Robotaxi launch.

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Credit: Tesla

Tesla analyst Adam Jonas of Morgan Stanley is telling investors to be wary of the Robotaxi details CEO Elon Musk revealed this week, after a report seemed to land on the prospective launch date of the platform in June.

Earlier this week, a report from Bloomberg indicated Tesla had internally landed on a tentative date of June 12 for its Robotaxi launch in Austin. Shortly after, Musk detailed the successful testing Tesla has already performed without anyone in the driver’s seat.

Tesla lands on date for Robotaxi launch in Austin: report

He also indicated Teslas would self-deliver to customers in June.

Analysts are now sending out investor notes on the announcement Musk made, along with the Bloomberg report. Jonas’s note is more cautious than others.

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Jonas believes Tesla needs to shed more details before investors and fans of the company get too excited. He believes there is more information that could be released, but until then, he is suggesting investors “keep expectations well contained.”

He wrote:

“As is typical for highly anticipated Tesla events, we would keep expectations well contained for the (reported) June 12th Cybercab launch event in Austin. However, we would look for a continued stream of updates for the performance and growth of the network thereafter (numbers of cars, miles, trips, etc.) in the days and weeks that follow.”

The tone of Jonas’s note contradicts that of Wedbush’s Dan Ives, who believes the “golden age of autonomous” lies in Tesla’s hands. He seems to believe Tesla will come through on its June 12 launch.

Tesla set for ‘golden age of autonomous’ as Robotaxi nears, ‘dark chapter’ ends: Wedbush

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Morgan Stanley’s note is slightly more

Jonas is obviously still bullish, but is much more tentative to move forward with an attitude that communicates skepticism about what Tesla has revealed.

Jonas and Morgan Stanley have a $410 price target on Tesla shares with a ‘Buy’ rating. Tesla stock is trading at around $358 at 12:15 p.m. on the East Coast.

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