Method and system for controlling wound rotor synchronous motor
AssigneeHyundai Motor Company
InventorKyung Su Kim
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a system for controlling a wound rotor synchronous motor including: a current/voltage determiner configured to determine optimum rotor current using a map from real-time motor operating information and to determine and output a rotor voltage according to the determined optimum rotor current, and a temperature estimator configured to calculate and output a rotor coil temperature from the rotor voltage and the optimum rotor current output from the current/voltage determiner using a rotor coil temperature estimation equation set from a correlation equation between the rotor voltage and the rotor coil temperature for each rotor current.
Claims12
A system for controlling a wound rotor synchronous motor, comprising:
- a current/voltage determiner configured to determine an optimum rotor current using a map from real-time motor operating information, and configured to determine and output a rotor voltage based on the optimum rotor current;
- and
- a temperature estimator configured to calculate and output a rotor coil temperature from the rotor voltage and the optimum rotor current output from the current/voltage determiner based on a rotor coil temperature estimation equation, wherein the rotor coil temperature estimation equation is a correlation equation, for each of a plurality of a rotor current, between the rotor voltage and the rotor coil temperature;
- a determiner configured to determine whether a logic for protecting a rotor coil is in an on-state or an off-state, wherein the logic for protecting the rotor coil is based on a comparison of the rotor coil temperature with a preset rotor protection temperature value;
- and a rotor command determiner configured to determine a rotor current command based on a result of the determiner, wherein the rotor current command controls current applied to the rotor coil;
- wherein the temperature estimator sets the rotor coil temperature estimation equation as:
- Temp f=A×Vf+B,
- wherein Temp f is the rotor coil temperature, Vf is the rotor voltage, and A and B are a coefficient and a constant that are preset for each rotor current of the plurality of the rotor current, and wherein A and B are determined based on the optimum rotor current.
A method of controlling a wound rotor synchronous motor, comprising:
- determining an optimum rotor current using a map from real-time motor operating information and determining a rotor voltage based on the optimum rotor current;
- and
- calculating a rotor coil temperature from the rotor voltage and the optimum rotor current based on a rotor coil temperature estimation equation, wherein the rotor coil temperature estimation equation is a correlation equation, for each of plurality of a rotor current, between the rotor voltage and the rotor coil temperature;
- determining whether a logic for protecting a rotor coil is an on-state or an off-state, wherein the logic for protecting the rotor coil is determined based on a comparison of the rotor coil temperature with a preset rotor protection temperature value;
- and determining a rotor current command, wherein the rotor current command controls current applied to the rotor coil;
- wherein the rotor coil temperature estimation equation is set as:
- Temp f=A×Vf+B,
- wherein Temp f is the rotor coil temperature, V is the rotor voltage, and A and B are a coefficient and a constant that are preset for each of the plurality of the rotor current, and wherein A and B are determined based on the optimum rotor current.
Dependencies are inferred from the claim text.