AU2017101821A4 - Introduce a simple low-cost fuel electric vehicle solution - Google Patents

Abstract

Now on the motor market, all the vehicles can be divided into three categories: 1. Engine cars 2. Electric cars 3. Hybrid cars The vehicles set up by this invention; it can be seen as a fourth type of car. It is very unique, different motor vehicle driving principle from other categories cars on the market. Its most significant features are simple technology, easy to manufacture, low cost. The maintenance is also much easier. I believe there will be some competitiveness in market.

Description

In order to reduce emissions and protect the environment, electric cars came into being. Electric vehicles are driven by electricity, it can achieve zero emissions in theory, but the disadvantage is the low mileage, long time charging, the bulky heavy weight battery, so that the promotion of electric vehicles is limited. Therefore, hybrid vehicles come into being (like Toyota Pruis). Hybrid vehicle is a solution to the problem of electric vehicles. However, there are some disadvantages of the hybrid vehicle, such as higher technical difficulty, complex structure and high production cost. This invention introduces a simple low-cost hybrid vehicle, which has the low technical threshold, simple structure, and low cost advantages, just make up for the shortcomings of the hybrid vehicles.

Features:

The three-phase alternator is driven by an internal combustion engine, then alternator directly drives a three-phase AC motor (this motor is a pole-variable AC motor). The block diagram is as follows:

Internal combustion engine --> Alternator --> AC motor

The structure is simplified a lot due to remove the bulky size and weight of the battery. This invention greatest feature is the use of changes in engine speed so that the alternator emits different frequencies current to replace the usual battery DC-AC inverter to achieve the motor Speed. The alternator emits sine-wave AC electricity that is better than non-sinusoidal AC electricity emitted by the DC-AC inverter. As we know, the induction motor speed is determined by the power frequency. The alternator frequency depends on the engine speed. The foot throttle can control engine speed, so as to drive the alternator to send out different frequency AC to make the motor get different speed. It can meet the different speed requirements of the vehicle running on road. That is consistent with the traditional car driving habits, the more accelerator pedal, the more motor speed, and the other way around.

Claims (3)

1. Let us compare it with traditional cars

   1. Compare with the hybrid car: The technical threshold is low, the structure is simple, and the cost is low. In the solution, the alternator directly drive motor is more efficient than the battery driven motor. The DC output from the battery is converted into a non-sinusoidal AC by the inverter. This will produce higher harmonics, resulting in motor more temperature and reduce efficiency. The program is that alternator issue frequency-variable sine-wave AC, there is no higher harmonics cause induction motor copper consumption, help to reduce temperature and improve the motor efficiency. The program can also be equipped with the battery like normal hybrid car, such as in the case of red light stopping, as the engine has been running, but the vehicle has stopped moving, this time the alternator can send the electricity to charge battery for saving energy. The diagram as shown below: Engine->Alternator->Battery->DC-AC lnverter->AC motor I_I The battery with this solution is just an auxiliary function. Under normal driving conditions, the alternator directly drives the motor because the sinusoidal AC power must be better than the non-sinusoidal AC output of the battery inverter, only when the traffic is jam and the speed is slow in the case of frequent stopping. When the battery is fully charged, the engine can be turned off and the vehicle is driven by battery, so as to achieve the energy-saving emission reduction effect. When the traffic smooth, motor immediately restore the alternator directly driving, the motor then obtain high power output. Therefore, the car adopting this scheme does not need a large capacity battery like a hybrid car, because the battery temporarily substitutes the alternator for low power output only when the vehicle runs slowly. It can still achieve the effect of weight loss and cost reduction.
2. 2. Compare with the common engine car: The program can be coupled with a variable-pole AC motor, you can save the gearbox, because at low speeds, the internal combustion engine output torque is not enough, easy to turn off when the load is heavy. When the car is low speed running, the gearbox can let engine at high speed to achieve low-speed output, so the traditional car gearbox is essential. But the motor output torque depends on the load, the load increases, the speed will reduce the output torque also increases. This motor features make it does not require gearbox, the motor pole-variable is similar to the gearbox shift. In addition, the output of the engine with only one alternator, the load is relatively stable, compared with the average car engine, this program engine does not need too strict and high technology processing requirements, the manufacturing process is relatively simple end easy, with a alternator and motor instead of the gearbox, and you can also save that charger (that is, for the lead-acid battery charging), if using two small motors directly drive the two rear wheels, also can save the differential and cardan shaft when compared with rear-wheel drive traditional cars.
3. 3. Compare with the electric car: The invention has the advantages of low cost, high efficiency and long mileage. The invention saves the large capacity battery and reduces the cost. In addition, the invention drives the motor by the sine-wave alternating current with higher efficiency than the non-sinusoidal alternating current by the battery DC-AC inverter. The advantage is obvious.