초록 ▼

A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller responsive to at least one of: a current sensor, and a temperature sensor. Where the controller executes a parameter estimation process, which is responsive to at lea

A method and system for estimating a parameter of an electric machine, including a controller and a switching device, the controller responsive to at least one of: a current sensor, and a temperature sensor. Where the controller executes a parameter estimation process, which is responsive to at least one of: a current value and a temperature estimate and the resultant of the parameter estimation process representing an estimated parameter of the electric machine. The parameter estimation includes a method for estimating a temperature of the electric machine comprising: the temperature sensor operatively connected to and transmitting a temperature signal corresponding to a measured temperature to a controller, which executes the temperature estimation process responsive to a temperature signal from the temperature sensor.

대표청구항 ▼

What is claimed is: 1. A method for estimating at least one parameter associated with an electric machine, the electric machine operably coupled to a controller, the controller controlling operation of the electric machine, the method comprising: measuring a temperature of the controller to obtain

What is claimed is: 1. A method for estimating at least one parameter associated with an electric machine, the electric machine operably coupled to a controller, the controller controlling operation of the electric machine, the method comprising: measuring a temperature of the controller to obtain a measured temperature, utilizing a temperature sensor; estimating a temperature of the electric machine to obtain a first estimated temperature, utilizing a first temperature estimation filter associated with the electric machine, based on the measured temperature; and estimating at least one parameter associated with the electric machine based on the estimated temperature of the electric machine. 2. The method of claim 1, wherein the first temperature estimation filter associated with the electric machine comprises a magnet temperature estimation filter, and the step of estimating the temperature of the electric machine comprises: estimating a temperature of a magnet in the electric machine, utilizing the magnet temperature estimation filter, based on the measured temperature of the controller. 3. The method of claim 1, wherein the first temperature estimation filter associated with the electric machine comprises a copper winding temperature estimation filter, and the step of estimating the temperature of the electric machine comprises: estimating a temperature of a copper winding in the electric machine, utilizing the copper winding temperature estimation filter, based on the measured temperature of the controller. 4. The method of claim 1, wherein the at least one parameter associated with the electric machine comprises at least one of a motor winding resistance and a motor voltage constant. 5. The method of claim 1, further comprising estimating a temperature of a switching device in the controller to obtain a second estimated temperature utilizing a second temperature estimation filter associated with the controller, based on the measured temperature of the controller; and estimating at least one parameter associated with the controller, utilizing the second temperature estimation filter, based on the second estimated temperature of the controller. 6. The method of claim 5, wherein the second temperature estimation filter comprises a silicon temperature estimation filter. 7. The method of claim 5, wherein the at least one parameter associated with the controller is a FET resistance. 8. A system for estimating at least one parameter associated with an electric machine, comprising: a controller configured to be operably coupled to the electric machine; a temperature sensor configured to generate a signal indicative of a temperature of the controller; and the controller configured to determine a measured temperature associated with the controller based on the signal, the controller further configured to estimate a temperature of the electric machine to obtain a first estimated temperature, utilizing a first temperature estimation filter associated with the electric machine, based on the measured temperature, the controller further configured to estimate at least one parameter associated with the electric machine based on the estimated temperature of the clectric machine. 9. The system of claim 8, wherein the first temperature estimation filter associated with the electric machine comprises a magnet temperature estimation filter, the controller further configured to estimate the temperature of the electric machine by estimating a temperature of a magnet in the electric machine, utilizing the magnet temperature estimation filter, based on the measured temperature of the controller. 10. The system of claim 8, wherein the first temperature estimation filter associated with the electric machine comprises a copper winding temperature estimation filter, the controller further configured to estimate the temperature of the electric machine by estimating a temperature of a copper winding in the electric machine, utilizing the copper winding temperature estimation filter, based on the measured temperature of the controller. 11. The method of claim 8, wherein the at least one parameter associated with the electric machine comprises at least one of a motor winding resistance and a motor voltage constant. 12. The system of claim 8, wherein the controller is further configured to estimate a temperature of a switching device in the controller to obtain a second estimated temperature utilizing a second temperature estimation filter associated with the controller, based on the measured temperature of the controller, the controller further configured to estimate at least one parameter associated with the controller, utilizing the second temperature estimation filter, based on the second estimated temperature of the controller. 13. The system of claim 12, wherein the second temperature estimation filter comprises a silicon temperature estimation filter. 14. The system of claim 12, wherein the at least one parameter associated with the controller is a FET resistance.