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electric motor efficiency vs internal combustion

The internal combustion engine is to convert chemical energy into mechanical energy, combustion process is a very complex process, many uncontrollable factors, and the principle of internal combustion engine, a working stroke exhaust stroke, so the mechanical energy output of different strokes in a period inside is not uniform, in order to reduce the torque volatility measures often used is to add the inertia flywheel, causing the engine quality, decrease power weight ratio, and the structure of internal combustion engine control complex, need to consider the air intake, fuel injection quantity, also need calibration, it is far not as simple motor. Motor converts electrical energy into mechanical energy, energy conversion process clean, from the manufacturing process to the control algorithm, the relative internal combustion engine is easier to point (deep research, is also very complex, but relatively speaking), and motor mature FOC algorithm and DTC algorithm makes the motor speed and torque control performance well, this is the internal combustion engine than internal combustion engine but now is still very common, after all is now a storage device, including lead-acid batteries, nickel hydrogen batteries, super capacitors and other energy density is too low, resulting in pure electric vehicles as well as UAV short mileage. Such as the armed forces to travel often generator, once the battery runs out, diesel engine driven generator for fossil energy is relative to the possible period of want or need, because the battery is good to carry but now, the battery energy density is less than the fossil energy to high mileage economy, still occupy the main market of internal combustion engine

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