The two major trends in “green†vehicles that enhance energy efficiency and reduce emissions, enhance protection and improve safety functions are driving the development of next-generation vehicles. Obviously, cars with green designs are not necessarily hybrid vehicles (HEVs). In fact, there are many traditional technologies that can make cars more environmentally friendly, helping to improve fuel efficiency and reduce gas emissions, such as direct fuel injection, variable valve control, cylinder deactivation, turbocharged engines, and lubrication engines.
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From the perspective of energy saving, we see “green cars†with different designs and styles. Some of them allow consumers to meet their needs with less budget. The Start-stop function is an affordable energy-saving feature. This function allows the internal combustion engine to automatically suspend operation when the car encounters a red light or a traffic jam. European OEMs have taken this capability as a standard feature of their mainstream platform. The extra cost involved in the entire start/stop function is only $300, but it can save 3% to 10% of fuel, and the effect is very significant. If the car is driving in a city with very heavy traffic, it can even save up to 25% of fuel. Since the start/stop function can be run on a standard 12V power network, this design is the main feature of this function without the need for expensive higher voltage systems or additional energy storage batteries for light and full hybrid vehicles (HEVs). Cost advantage.
Of course, for many people, HEV is equivalent to the future green car, but we should pay attention to the development of HEV has many different designs, including the micro starter / stop function through the integrated starter AC engine (ISA) HEV, full HEV and plug-in HEV that continuously increase the energy efficiency of pure electric driving, are all in a variety of designs. The design is more challenging because the light, full and plug-in HEV requires a high voltage electronic system between 600V and 1,200V. In order to provide enough electric motor power to an electric engine car, or to provide sufficient support for an internal combustion engine, some large engine drives are needed. These large engines were previously only used in the industrial world, and are now gradually entering automotive applications. In addition, electric power systems and other new electronic systems need to be integrated into the new HEV vehicle architecture.
The new electronic system includes DC/DC converters that enable energy transfer between 12V and high voltage power networks, as well as numerous electronic drive systems such as air conditioners and power steering systems. This is a challenge for the automotive engineering and semiconductor industries, because people used to work in a 12V battery environment, but now they have to face the dangers of high voltage electronics, so these dangerous electronic systems must be taken. Safely isolated.
In addition, HEV's high-voltage architecture requires the deployment of additional peripheral systems as well as energy and battery management units. Therefore, we must develop reliable, advanced driver ICs and switches in the power management field to cope with the challenges of the automotive environment. The efficiency and cost-effectiveness must ensure that the technology of the entire design concept is practical and feasible, and the price will not exceed the user's acceptable range. . IR's power management semiconductors can support all of these requirements, but the main challenge facing HEVs is the technology of the battery itself.
Today, batteries including the new lithium-ion battery have technical limitations and shortcomings, such as walking a limited distance between two power storages; long charging time; and high battery cost and huge Volume and weight. While global battery manufacturers are working hard to improve the electrochemical technology of the battery itself, we believe that through intelligent electronic battery management solutions, we can continue to improve the battery to extend battery life, provide better performance, and reduce cost, size and weight.
Green design and HEV bring new challenges to power management in the automotive industry, and International Rectifier (IR) has an absolute advantage in this regard. IR has a long history of industrial engine drive power management, making us a unique automotive semiconductor supplier. IR provides high voltage power switches such as high voltage driver ICs and IGBTs. Today, we have a first-class engine-driven product lineup and are ready to launch more than 200 new automotive products specifically designed for harsh automotive environments in the next 12 months. Taking our engine control IC as an example, the IC has integrated multiple safety features to prevent catastrophic failure in the event of a short circuit in the power engine. In addition, the latest lead-free automotive line of DirectFET products not only brings very low on-resistance to the design of DC/DC converters and battery management systems, but also eliminates bond wires, allowing for very fast Under switching conditions, parasitic inductance can basically reach zero, while having first-class EMI performance.
IR's automotive business unit has five product lines, including high voltage driver ICs, smart power ICs, smart switches, MOSFETs, and high voltage IGBT switches for low, medium and up to 1,200V. IR offers a comprehensive chipset solution for virtually any power management application found in a modern HEV.
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