초록 ▼

Electrical actuator having a stator body and a rotor body which is pivotable iN the stator body through an angle of rotation. The actuator further comprises energizing means for exerting an electromagnetic torque on the rotor body and a control unit for controlling the angle of rotation. The control

Electrical actuator having a stator body and a rotor body which is pivotable iN the stator body through an angle of rotation. The actuator further comprises energizing means for exerting an electromagnetic torque on the rotor body and a control unit for controlling the angle of rotation. The control unit has a cascade control structure with a first control member for converting an electrical input signal corresponding to a required angle of rotation into an electrical intermediate signal corresponding to a required electromagnetic torque to be exerted on the rotor body and with a second control member for converting the intermediate signal into an output signal corresponding to a required electrical current through the energizing means. The first and second control members allow for specific intermediate calculations of the required electromagnetic torque and the required current, whereby the response time and accuracy of the control unit are improved.

대표청구항 ▼

[ What is claim is:] [1.] An electrical actuator comprisinga first actuator body,a second actuator body which is rotatable with respect to the first actuator body about an axis of rotation,means for exerting a load torque on the second actuator body, which load torque urges said second actuator body

[ What is claim is:] [1.] An electrical actuator comprisinga first actuator body,a second actuator body which is rotatable with respect to the first actuator body about an axis of rotation,means for exerting a load torque on the second actuator body, which load torque urges said second actuator body toward a rest position with respect to said first actuator body,electrical energizing means for exerting an electromagnetic torque on the second actuator body, said electromagnetic torque acting oppositely to said load torque to cause said second actuator body to rotate through an angle of rotation .phi. from said rest position to a desired position, said angle .phi. being proportional to said electromagnetic torque,a first control member having an electrical input for receiving an electrical signal u.sub..phi. corresponding to a required angle of rotation .phi..sub.R of the second actuator body, and an electrical output for supplying an electrical signal u.sub.EM corresponding to the electromagnetic torque T.sub.EM which is required to achieve the required angle .phi..sub.R, anda second control member having an electrical input for receiving the signal u.sub.EM, and an electrical output for supplying a signal u.sub.I which is used to determine an electrical current supplied to said energizing means to exert the required electromagnetic torque T.sub.EM.