Patent ID: 11936258
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A method for controlling the outputs of electric motors, comprising the steps of:
providing at least an electric motor comprising a stator, a rotor being rotatable relative to the stator, the stator including a plurality of stator slots, a plurality of stator teeth, and a stator winding unit being wound on the stator teeth and installed in the stator slots, the stator winding selected from a group consisting of a first winding group, a second winding group, a third winding group and a fourth winding group; the first winding group comprising a first primary winding with a first number of poles and a first rated power and a first secondary winding with the first number of poles and a second rated power being smaller than the first rated power; the second winding group comprising a second primary winding with a second number of poles and a third rated power, and a second secondary winding with a third number of poles and a fourth rated power being smaller than the third rated power; the third winding group comprising a third primary winding with a fourth number of poles and a fifth rated power, a fourth primary winding with a fifth number of poles and a sixth rated power being smaller than the fifth rated power, a third secondary winding with the fourth number of poles and a seventh rated power being smaller than the fifth rated power, and a fourth secondary winding with the fifth number of poles and a eighth rated power being smaller than the sixth rated power; the fourth winding group comprising a fifth primary winding with a sixth number of poles and a ninth rated power, a fifth secondary winding with the sixth number of poles and a tenth rated power being smaller than the ninth rated power, and a sixth second secondary winding with the sixth number of poles and a eleventh rated power being smaller than the tenth rated power;
providing a first control device respectively coupled with the electric motor and an external electrical power source for sensing a needed loading state of the electric motor and suppling a required connection relationship between the stator winding unit and the external electrical power source based on the needed loading state sensed by the first control device; the required connection relationship between the stator winding unit and the external electrical power source selected from one of the following connection relationships;
when the stator winding unit comprises the first winding group, and the first control device senses a first needed loading state, the first primary winding and the first secondary winding are simultaneously connected to the external electrical power source;
when the stator winding unit comprises the first winding group, and the first control device senses a second needed loading state being smaller than the first loading state, only the first primary winding is connected to the external electrical power source;
when the stator winding unit comprises the second winding group, and the first control device senses a third needed loading state, the second primary winding is connected to the external electrical power source;
when the stator winding unit comprises the second winding group, and the first control device senses a fourth needed loading state being smaller than the third loading state, the second secondary winding is connected to the external electrical power source;
when the stator winding unit comprises the third winding group, and the first control device senses a fifth needed loading state, the third primary winding and the third secondary winding are connected to the external electrical power source;
when the stator winding unit comprises the third winding group, and the first control device senses a sixth needed loading state being smaller than the fifth loading state, only the third primary winding is connected to the external electrical power source;
when the stator winding unit comprises the third winding group, and the first control device senses a seventh needed loading state, the fourth primary winding and the fourth secondary winding are connected to the external electrical power source;
when the stator winding unit comprises the third winding group, and the first control device senses an eighth needed loading state being smaller than the seventh loading state, only the fourth primary winding is connected to the external electrical power source;
when the stator winding unit comprises the fourth winding group, and the first control device senses a ninth needed loading state, the fifth primary winding, the fifth secondary winding and the sixth secondary winding are connected to the external electrical power source;
when the stator winding unit comprises the fourth winding group, and the first control device senses a tenth needed loading state being smaller than the ninth loading state, the fifth primary winding and the fifth secondary winding are connected to the external electrical power source;
when the stator winding unit comprises the fourth winding group, and the first control device senses an eleventh needed loading state being smaller than the tenth loading state, the fifth primary winding and the sixth secondary winding are connected to the external electrical power source; and
when the stator winding unit comprises the fourth winding group, and the first control device senses a twelfth loading state being smaller than the eleventh loading state, only the fifth primary winding is connected to the external electrical power source.