System for controlling a motor
First Claim
1. A control system for a motor comprising:
- a current regulation controller for generating a terminal voltage command used for converting a supply voltage to a three phase voltage to power a motor;
a terminal voltage command feedback module for controlling the terminal voltage command, wherein the terminal voltage command feedback module compares the terminal voltage command to a determined voltage limit of the supply voltage and generates a d-axis current adjustment command in accordance with the comparison, the d-axis current adjustment command used for reducing the terminal voltage command below the determined voltage limit; and
a summer coupled with the terminal voltage command feedback module, wherein the summer adds the d-axis current adjustment command to a d-axis current command received from a lookup table.
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Accused Products
Abstract
A control system for a motor includes a current regulation controller for generating a terminal voltage command. The terminal voltage command is used for converting a supply voltage to a three phase voltage to power a motor. The control system also includes a terminal voltage command feedback module for controlling the terminal voltage command. The terminal voltage command feedback module compares the terminal voltage command to a determined voltage limit of the supply voltage and generates a d-axis current adjustment command in accordance with the comparison. The d-axis current adjustment command is used for reducing the terminal voltage command below the determined voltage limit. The control system also includes a summer coupled with the terminal voltage command feedback module. The summer adds the d-axis current adjustment command to a d-axis current command received from a lookup table.
37 Citations
19 Claims
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1. A control system for a motor comprising:
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a current regulation controller for generating a terminal voltage command used for converting a supply voltage to a three phase voltage to power a motor; a terminal voltage command feedback module for controlling the terminal voltage command, wherein the terminal voltage command feedback module compares the terminal voltage command to a determined voltage limit of the supply voltage and generates a d-axis current adjustment command in accordance with the comparison, the d-axis current adjustment command used for reducing the terminal voltage command below the determined voltage limit; and a summer coupled with the terminal voltage command feedback module, wherein the summer adds the d-axis current adjustment command to a d-axis current command received from a lookup table. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An anti-wind up proportional-integral controller for a voltage feedback control module used with a motor, comprising:
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an integrator module including an integrator input, an integrator upper limit input, an integrator lower limit input, a positive hold input, and a negative hold input; a summation module connected with the integration module for summing a limited output of the integrator module and a proportional gain output to obtain a summation module result; a sum saturation module connected with the summation module and including a sum upper limit and a sum lower limit, the sum saturation module configured to output the summation module result when the summation module result is less than the sum upper limit and greater than the sum lower limit, to output the sum lower limit when the summation module result is less than the sum lower limit, to output the sum upper limit when the summation module result is greater than the sum upper limit, and to output a positive hold signal to the positive hold input of the integrator module when the summation module result is greater than the sum upper limit, wherein the integrator lower limit input is set to zero, the sum lower limit is set to zero, and the negative hold is disabled. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of controlling a motor comprising:
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monitoring a terminal voltage command generated by a current regulation controller; comparing the terminal voltage command to a voltage limit of a supply voltage; generating an adjustment command based on the comparison; adding the adjustment command to a current command obtained from a lookup table to create an adjusted current command; and transmitting the adjusted current command to the current regulation controller. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification