Method for reliable control of high rotor pole switched reluctance machine
A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
1. A method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system, the method comprising:
providing an HRSRM with a rotor and a stator with plurality of stator phases each having a winding;
energizing at least one of the plurality of stator phases;
measuring a current value through the at least one energized stator phase and time taken by the current value to reach a peak value of current, wherein each of the windings of the rest of the plurality of stator phases is in an open circuit state;
determining and storing a self-inductance related value for the at least one energized stator phase;
estimating a rotor position utilizing stored self-inductance value; and
controlling the HRSRM based on the estimated rotor position.
2. The method of claim 1 wherein the self-inductance value and the current value are stored.
3. The method of claim 1 wherein the self-inductance value and the current value are stored in a form of an analytical expression.
4. A method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system, the HRSRM including a rotor and a stator with a plurality of stator phases each having a winding, the method comprising the steps of:
energizing at least one of the plurality of stator phase;
measuring a current value through the at least one energized stator phase and time taken by the current value to reach a preset magnitude of current, wherein each of the windings of the rest of the plurality of stator phases is in an open circuit state;
determining and storing a self-inductance value for the at least one energized stator phase;
estimating a rotor position utilizing the stored self-inductance value; and
controlling the HRSRM based on the estimated rotor position.
5. The method of claim 4 wherein the self-inductance value and the current value are stored.
6. The method of claim 5 wherein the self-inductance value and the current value are stored in a form of an analytical expression.
7. A sensorless reliable control system for a high rotor pole switched reluctance machine (HRSRM) comprising:
a stator phase energizing module to excite at least one of a plurality of stator phases each having a winding;
a current and time measuring module to measure a current value through the at least one energized stator phase and time taken by the current value to reach a peak value of current, wherein each of the windings of the rest of the plurality of stator phases is in an open circuit state;
a self-inductance determining module to determine and store a self-inductance value for the at least one energized stator phase;
a rotor position estimation module to estimate a rotor position utilizing the stored self-inductance value; and
a control module to control the HRSRM based on the estimated rotor position.
8. The sensorless reliable control system of claim 7 wherein the self-inductance and the current values are stored.
9. The sensorless reliable control system of claim 8 wherein the self-inductance and the current values are stored in the form of an analytical expression.
10. A sensorless reliable control system for a high rotor pole switched reluctance machine (HRSRM), comprising:
a stator phase energizing module to excite at least one of a plurality of stator phases each having a winding;
a current and time measuring module to measure a current value through the at least one energized stator phase and time taken by the current value to reach a preset or pre-determined threshold of current, wherein each of the windings of the rest of the plurality of stator phases is in an open circuit state;
a self-inductance determining module to determine and store a self-inductance value for the at least one energized stator phase;
a rotor position estimation module to estimate a rotor position utilizing the stored self-inductance value; and
a control module to control the HRSRM based on the estimated rotor position.
11. The sensorless reliable control system of claim 10 wherein the self-inductance and the current values are stored.
12. The sensorless reliable control system of claim 10 wherein the self-inductance and the current values are stored in the form of an analytical expression.