Position controller of electronic throttle body

The invention relates to a position controller of an electronic throttle body, belonging to an automobile engine intake system, in particular to an instrument controlling intake amount by accurately controlling the opening position of a throttle slice. The position controller of the electronic throttle body mainly comprises DC 12V and DC 5V switching power supplies, a 89C51singlechip control system, a liquid crystal display circuit, a motor-direction control circuit, a position signal pulse-width modulation generator circuit, an L298N module direct current servo system power driver circuit and an analog-to-digital conversion circuit; and particularly, the position controller of the electronic throttle body adopts a non-contact double-feedback position sensor and a position-locking signal generator circuit to lock the position of the throttle slice without fluctuation, thereby accurately controlling the position of the throttle slice and finally enabling an engine to be in an operation state with optimal dynam