Multi pole and multi slot motor control apparatus and method
A multi-pole and multi-slot motor control apparatus includes a multi-pole and multi-slot motor including a stator and a rotor rotationally driven by the stator. The stator includes a core accommodating the rotor and winding poles protruding toward the rotor from the core and on which coils are wound, inverters connected to the coils wound around the winding poles and applying currents to the coils, and a controller shutting down the inverter connected to the failed coil or inverter and controlling the remaining inverters in a boost-up manner when at least one of the coils and the inverters is failed. Accordingly, output, which is the same as output before the inverters or the coils are failed through boost-up control of the remaining normal inverters even when the inverters or the coils are partially failed, may be provided, and the multi-pole and multi-slot motor may be stably driven regardless of a failure.
1. A multi-pole and multi-slot motor control apparatus comprising:
a multi-pole and multi-slot motor including a stator and a rotor rotationally driven by the stator, wherein the stator includes a core accommodating the rotor and a plurality of winding poles protruding toward the rotor from the core and on which coils are wound;
a plurality of inverters connected to the coils wound around the plurality of winding poles and configured to apply currents to the coils;
a controller configured to shut down the inverter connected to the failed coil or the failed inverter and control the remaining inverters in a boost-up manner when at least one of the plurality of coils and the plurality of inverters is failed; and
cutoff switches connected between the plurality of inverters and the plurality of coils,
wherein the controller turns off the cutoff switch connected to the shorted coil when a cause of a failure is determined as a short circuit between the coils.
2. The multi-pole and multi-slot motor control apparatus of claim 1 , wherein the inverter includes first to fourth switches configured in an H-bridge shape.
3. The multi-pole and multi-slot motor control apparatus of claim 1 , wherein the controller shuts down the failed inverters and applies currents which are (n/(n−f)) times (here, n is the number of slots and f is the number of failed coils or failed inverters) the currents before failure to the multi-pole and multi-slot motor through the remaining inverters when at least one of the plurality of coils and the plurality of inverters is failed.
4. A multi-pole and multi-slot motor control apparatus comprising:
a multi-pole and multi-slot motor including a stator and a rotor rotationally driven by the stator, wherein the stator includes a core accommodating the rotor and a plurality of winding poles protruding toward the rotor from the core and on which coils are wound;
a plurality of inverters connected to the coils wound around the plurality of winding poles and configured to apply currents to the coils; and
a controller configured to shut down the inverter connected to the failed coil or the failed inverter and control the remaining inverters in a boost-up manner when at least one of the plurality of coils and the plurality of inverters is failed
wherein:
the plurality of inverters include a plurality of U-phase inverters configured to supply U-phase currents, a plurality of V-phase inverters configured to supply V-phase currents, and a plurality of W-phase inverters configured to supply W-phase currents;
one of the U-phase inverters, one of the V-phase inverters, and one of the W-phase inverters are grouped to form each of a plurality of inverter groups; and
the controller compares magnitudes of the phase currents output from the inverters having the same phase in different inverter groups and compares phases of the phase currents output from the inverters having different phases in the same inverter group to determine whether the inverters are failed.
5. The multi-pole and multi-slot motor control apparatus of claim 4 , wherein the controller controls the inverter configured to output the current having the same phase as the failed inverter in a boost-up manner or increases magnitude of the current output from the inverter having a different phase in the same inverter group with the failed inverter and changes the phase of the current.
6. A method of controlling a multi-pole and multi-slot motor including a stator and a rotor rotationally driven by the stator, wherein the stator includes a core accommodating the rotor and a plurality of winding poles protruding toward the rotor from the core and on which coils are wound, the method comprising:
applying currents to the coils wound around the plurality of winding poles by inverters;
determining whether the plurality of coils or the plurality of inverters are failed;
shutting down the inverter connected to the failed coil or the failed inverter and controlling the remaining inverters in a boost-up manner when at least one of the plurality of coils and the plurality of inverters is failed; and
turning off a cutoff switch connected to the shorted coil among cutoff switches connected between the plurality of inverters and the plurality of coils when a cause of a failure is determined as a short circuit between the coils.
7. The method of claim 6 , wherein the applying of currents to the coils includes controlling turning on and turning off of first to fourth switches configured in an H-bridge shape in the inverters to apply currents to the coils.
8. The method of claim 6 , wherein the controlling of the inverter in a boost-up manner includes shutting down the failed inverter and applying currents which are (n/(n-f)) times (here, n is the number of slots and f is the number of failed coils or failed inverters) the currents before failure to the multi-pole and multi-slot motor through the remaining inverters when at least one of the plurality of coils and the plurality of inverters is failed.