Spring Return Throttle Actuators, Methods of Controlling Spring Return Throttle Actuators and Throttle Assemblies

摘要

The present invention relates to a spring return throttle actuator (1), wherein the spring return throttle actuator (1) is an electric, plural coil type (C1, C2, C3) DC motor (2) having a output shaft (4), throttle return A spring 10, a gear transmission 5 connected to the output shaft, and a control unit (CPU) configured to control the supply of power to the DC motor 2, the spring return throttle actuator 1 being fully open with a closed throttle Has a moving range between the throttles. The control unit CPU is arranged to short the at least two DC motor coils C1, C2, C3 to produce a DC motor return resistance torque, the spring return resistance torque generated over the entire range of movement of the actuator. The return spring is balanced so that does not exceed the DC motor return resistance torque. The invention also relates to a control method and a throttle assembly of a spring return throttle actuator.