Position sensorless control of permanent magnet motor
First Claim
1. A motor control system comprising:
- control circuitry configured to generate control signals to control a permanent magnet motor based at least in part upon a comparison of a flux-producing current component of a power waveform supplied to the permanent magnet motor and a flux-producing component of a command reference current value and to determine the angular position of the stator magneto-motive force based at least in part on a comparison of a torque-producing current component of the power waveform and a torque-producing component of the command reference current value.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods of controlling a permanent magnet motor without a mechanical position sensor are provided. In accordance with one embodiment, a motor control system includes an inverter configured to receive direct current (DC) power and output a power waveform to a permanent magnet motor, driver circuitry configured to receive control signals and drive the inverter based upon the control signals, a current sensor configured to determine a sampled current value associated with the power waveform, and control circuitry configured to generate the control signals based at least in part upon a comparison of a flux-producing component of the sampled current value and a flux-producing component of a command reference current value.
-
Citations
25 Claims
-
1. A motor control system comprising:
control circuitry configured to generate control signals to control a permanent magnet motor based at least in part upon a comparison of a flux-producing current component of a power waveform supplied to the permanent magnet motor and a flux-producing component of a command reference current value and to determine the angular position of the stator magneto-motive force based at least in part on a comparison of a torque-producing current component of the power waveform and a torque-producing component of the command reference current value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
8. A method of controlling a permanent magnet motor comprising:
-
causing an inverter to output a voltage waveform to a permanent magnet motor; sensing a current associated with the voltage waveform; determining a flux-producing component of the current based at least in part on an angular position of a stator magneto-motive force; causing the inverter to output a corrected voltage waveform based at least in part upon a comparison of the flux-producing component of the current and a flux-producing component of a command reference current; and determining the angular position of the stator magneto-motive force based at least in part upon the a comparison of a torque-producing current component of the power waveform and a torque-producing component of the command reference current. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A method of controlling a motor comprising:
-
receiving a current reference value; sampling a power waveform supplied to a permanent magnet motor to obtain a feedback current value; determining a torque-producing correction voltage based at least in part on a comparison of a flux-producing component of the feedback current value and a flux-producing component of the command reference current value; determining a command voltage value based at least in part on the torque-producing correction voltage; and determining an angular position of a stator magneto-motive force of the permanent magnet motor based at least in part on a comparison of a torque-producing current component of the power waveform and a torque-producing component of the command reference current value. - View Dependent Claims (15, 16, 17)
-
-
18. A motor control system comprising:
control circuitry configured to generate control signals for controlling a permanent magnet motor without the use of a motor position sensor and without regard to a saliency of the permanent magnet motor, wherein the control signals are based at least in part upon feedback from a power waveform supplied to the permanent magnet motor, wherein the control circuitry is configured to determine a position of the permanent magnet motor based at least in part on a comparison of a torque-producing component of the current reference value and a torque-producing component of the feedback from the power waveform. - View Dependent Claims (19, 20, 21, 22)
-
23. A machine readable storage medium tangibly embodying a sequence of instructions executable by the machine to perform a method, the method comprising:
-
receiving a current reference value; receiving a feedback current value; and determining a position of the permanent magnet motor without the use of a mechanical position sensor based at least in part on a comparison of a torque-producing component of the current reference value and a torque-producing component of the feedback current value. - View Dependent Claims (24, 25)
-
Specification