200款Prius的升压转换器

2000款Prius混合动力的升压系统分析与拆解报告

Development of Hybrid Electric Drive System

Using a Boost Converter

Masaki Okamura

Eiji Sato

Shoichi Sasaki

TOYOTA MOTOR CORPORATION

1, Toyota-cho, Toyota, Aichi, 471-8572, Japan

Phone/ Fax : +81-565-72-9071/9147

Abstract

Toyota introduced a new generation of hybrid vehicle to the market in September of 2003. The new Prius, equipped with a new Toyota-developed inverter system, is capable of outputting more power than the conventional systems. One of the strong points of this new system is that a Boost Converter has been placed between the inverter and the battery. The Boost Converter is capable of raising the voltage from the battery, enabling the inverter to drive a high power output motor. The Toyota Hybrid System (THS), consists of a high power motor, generator, and a battery of relatively lower power. When the Boost Converter was adopted in the THS, it was possible to keep bulk and cost of the additional unit in the system to a minimum, by letting the Boost Converter function to the same power level as the battery. The control system of the Boost Converter consists simply of a PI controller. By using existing sensors and microprocessors, it was possible to develop a new system at no additional costs. The Boost Converter’s control system achieves high efficiency by optimizing its output voltage according to the relative state of the motor and the generator. Toyota was able to achieve a 50% improvement in the motor power output with the new Boost Converter, while keeping a similar complexity of the conventional system. As of now, Toyota plans to spread the development to other new hybrid vehicles.__

Keywords: Hybrid, Electric Drive, Converter, Inverter, Control System

Figure1: TOYOTA NEW PRIUS