Digital control of motor drives
First Claim
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1. A variable speed or torque controller for a variable speed or torque electric machine, comprising:
- an actual machine operating value input;
a machine value set-point input;
a comparator for determining if the actual machine operating value is less than or greater than the machine value set-point input;
a binary pair of first and second active machine control states;
the first machine control state having predetermined parameters for running the machine at a first operating state value which drives operation of the electric machine in a first direction towards the machine value set-point, and the second machine control state having predetermined parameters for running the machine at a second operating state value which drives operation of the electric machine in a second direction towards the machine value set-point; and
means for selecting the first machine control state if the actual machine value is greater than the machine value set-point input, or selecting the second machine control state if the actual machine operating value is less than the machine value set-point input.
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Abstract
A digital controller is easily implemented for variable speed or torque control of an electric motor or generator by using a comparator to determine a choice of control state outputs.
33 Citations
18 Claims
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1. A variable speed or torque controller for a variable speed or torque electric machine, comprising:
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an actual machine operating value input;
a machine value set-point input;
a comparator for determining if the actual machine operating value is less than or greater than the machine value set-point input;
a binary pair of first and second active machine control states;
the first machine control state having predetermined parameters for running the machine at a first operating state value which drives operation of the electric machine in a first direction towards the machine value set-point, and the second machine control state having predetermined parameters for running the machine at a second operating state value which drives operation of the electric machine in a second direction towards the machine value set-point; and
means for selecting the first machine control state if the actual machine value is greater than the machine value set-point input, or selecting the second machine control state if the actual machine operating value is less than the machine value set-point input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification