By the introduction and comparison of the common power converter, the structure of the least main switchers is adopted in the power circuit. 60A/1000V IGBT, which drive circuit adopts EXB841 module, is used for the main switchers.
The hardware structure of the field measure-control unit made of AT89C2051, CC4051, 93LC46 and CC4049, and operating diagram of multi-collector, the flow diagram of collecting module program and optical-electricity isolation power circuit are described.
A close-loop power circuit with feedback switch power chip LM2587 and DAC chip TLV5618A is introduced. With this circuit,it can provide 8～36 V output,and its precision is 0.1 V.This circuit is used in automobile assembled meter debug system.
Selecting SPCE061A microprocessor as the CPU of the ABS controller and its hardware circuit is designed, including power circuit, wheel speed signal processing circuits, driving circuit, and fault diagnosis circuit using Protel dxp in this paper.
Six kinds of combination forms of combined stepless transmission are introduced,and the reasons for producing circulation power circuit have been analyzed and four combination units without circulation power circuit are presented.