Originally shared by USComponent
#IGBT cnc #PowerElectronicsModule #EnergyStorageSystem #Repairs #MassTransit #teslaElectricCars #ElectricMotor #MotorControlSystem
IGBT & tesla electric car
When you mount into the seat of a top-performance car that costs six figures, you look for definite things: acceleration that thrusts you back into the seat, top-end stereo system, street-clasping handling, the raucous rumble of a mighty engine and a big budget for the high-octane gas needed to fuel it. Well, the Tesla Roadster has nearly all of those aspects comprised. It’s speedy, new-fashioned, handles like charm and goes like a rocket, but it’s effectively noiseless and it’ll never consume a single drop of gasoline. Tesla’s initially manufactured car is also the world’s first top-performance electric car.
Unlike a conventional gasoline-fueled car, the Tesla Roadster doesn’t include hundreds of movable parts. It’s powered by only four major systems:
The Energy Storage System (ESS)
The Power Electronics Module (PEM)
An Electric Motor
A Sequential Manual Transmission
In place of an inner combustion engine, the Tesla Roadster sports a bank of batteries – the Energy Storage System (ESS). In amplifying a power source matching such a high-performance car, Tesla went with technology proven in the laptop computer field – rechargeable lithium-ion batteries. The Roadster contains 6,831 of them. They weigh about 1,000 pounds in total, and Tesla claims that they provide “four to five times the energy-density stores of other batteries”. The batteries fit into 11 sectors with 621 batteries each. An individual computer processor restrains each section to make sure all of the charging and discharging is handled easily.
The Power Electronics Module (PEM) is a power inverter and charging system that converts DC power to AC power using 72 Insulated Gate Bipolar Transistors(IGBTs). This results in a marked increase in power output compared to first-generation electric cars. Under peak acceleration, the batteries can crank out 200 kW of energy – enough to light 2,000 incandescent light bulbs.
In addition to controlling charge and discharge rates, the Power Electronics Module controls voltage levels, the motor’s RPM (revolutions per minute), torque and the regenerative braking system. This braking system captures the kinetic energy usually lost through braking and transfers it back into the ESS. The efficiency and integration of the battery, PEM and motor systems is between 85 and 95 percent, allowing the motor to put out up to 185 kW of power. Aluminum heat dissipation fins and a rear-mounted ventilation port keep the power transistors from overheating.
You can recharge the supercar in two different ways. An electrician can install a recharging station in your garage. This 220-volt, 70-amp outlet allows for a full recharge in 3.5 hours from a completely empty battery. Tesla likens charging the car to charging your cell phone; you can plug it in at night and have a fully-charged car in the morning. There’s also a mobile kit that allows recharging at any electrical outlet, no matter where you are. The length of time it takes to charge using the mobile kit depends on the outlet configuration that you’re using (110-volt or 220-volt).
A host of sensors detects acceleration, deceleration, tilt, temperature and smoke. If one senses an abnormal event, like a crash, it immediately shuts down and disconnects the power system. Similar anti-fault protections and sensors are part of the charging system.
Although auto owners have been driving around for decades with tankfulls of volatile, flammable gasoline in their cars, having 1,000 pounds of batteries behind their head gives some people pause. The recent recalls of lithium-ion batteries used in laptop computers have increased those fears. Tesla has gone to great lengths to ensure the safety of the Roadster’s energy system. First, the battery system was extensively “catastrophe tested,” which involved heating individual cells until they burst into flames. Each cell is isolated enough from adjacent cells to prevent any damage to them.
