Applied-voltage fuzzy control process for induction motors and device for performing it
First Claim
1. An applied voltage fuzzy control process for an electric motor comprising the steps of:
- measuring a speed error by comparing a present speed of the electric motor with a reference speed;
generating a derivative of the speed error;
measuring a power error by comparing a power supplied to the electric motor with a reference power; and
applying a fuzzy control to the speed error, to the derivative of the speed error and to the power error, to generate values of a drive voltage and a power supply pulse that are suitable to drive the electric motor.
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Accused Products
Abstract
The present invention relates to an applied-voltage fuzzy control process for induction motors including the following steps: measuring a speed error by comparing the current speed of an electric motor with a reference speed; generating the derivative of this speed error; measuring a power error by comparing the power supplied to the motor with a reference power; applying a fuzzy control to the speed error, to the derivative of the speed error, and to the power error so as to generate the values of a drive voltage and a power supply pulse that are suitable to drive the electric motor. The fuzzy control is divided into two sections: a first one for motor speed control and a second one for motor power control.
19 Citations
24 Claims
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1. An applied voltage fuzzy control process for an electric motor comprising the steps of:
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measuring a speed error by comparing a present speed of the electric motor with a reference speed; generating a derivative of the speed error; measuring a power error by comparing a power supplied to the electric motor with a reference power; and applying a fuzzy control to the speed error, to the derivative of the speed error and to the power error, to generate values of a drive voltage and a power supply pulse that are suitable to drive the electric motor. - View Dependent Claims (2, 3, 4, 5)
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6. An applied voltage fuzzy control device for an electric motor comprising:
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first comparison means for comparing a present speed of the electric motor with a reference speed to produce a speed error; means, coupled to the first comparison means, for generating a derivative of the speed error; second comparison means for comparing a power supplied to the electric motor with a reference power to produce a power error; and fuzzy control means, coupled to the means for generating and to the first and second comparison means, for applying a fuzzy control to the speed error, to the derivative of the speed error, and to the power error, to generate values of a drive voltage and a power supply pulse that are suitable to drive the electric motor. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A fuzzy control device for a motor comprising:
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a first comparison circuit that compares a present speed of the motor with a reference speed to produce a speed error; a derivative circuit, coupled to the first comparison circuit, that generates a derivative of the speed error; a second comparison circuit that compares a power supplied to the electric motor with a reference power to produce a power error; and a fuzzy control processor, coupled to the derivative circuit and to the first and second comparison circuits, that applies a fuzzy control to the speed error, to the derivative of the speed error and to the power error, to generate values of a drive voltage and a power supply pulse that are suitable to drive the electric motor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A process for applying fuzzy control to a motor comprising the steps of:
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comparing a present speed of the motor with a reference speed to produce a speed error; producing a derivative of the speed error; comparing a power supplied to the motor with a reference power to calculate a power error; and applying fuzzy control to the speed error, to the derivative of the speed error, and to the power error, to generate drive signals for the motor. - View Dependent Claims (23, 24)
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Specification