An electrical machine with a stator having multiple sections winding coil and switch combinations

Abstract

The present invention relates to an electrical machine for attaining varying torque at different speeds in vehicles by using switch combinations. The electrical machine comprises a coil with multiplesections C1, C2, C3, C4, C5, C6 connected such that all sections are in a series configuration to increase the Kt and some of the sections C1, C2, C3, C4, C5, C6 are connected in parallel to reduce the Ke. This increases the no-load speed during the motoring mode and reduces the voltage generated by the machine during the generation mode, by using switch arrangements. When the sections C1, C2, C3,C4, C5, C6 are connected in parallel, it reduces the resistance of each phase thereby reducing the copper losses and thus improves the efficiency of the machine. The applications are in integrated starter generator (ISG) system of any vehicles to provide high starting torque and to generate less voltage at high rpm. Also, can be used in any motor to provide torque to the vehicle at higher speeds.

Description

technical field [0001] The invention relates to a vehicle motor. More specifically, the present invention relates to an electric motor stator winding coil for obtaining varying torque at different speeds in a vehicle. Background technique [0002] In an automatic vehicle, a starter motor is used to start the engine when the vehicle is stationary. The starter motor provides very high torque to twist the engine when starting (running at low speed). The vehicle also has a magneto, which powers the vehicle's electrical load and battery (running at high speeds). [0003] When the functions of starter motor and magneto are combined into a single machine with conflicting requirements (i.e. high starting torque and low voltage generation at high rotational speeds (rpm), the cost of the controller scales with the high voltages these generate Increase. Starting torque requires high K t . K t is a design constant of the motor expressing the generated torque in terms of input cur...

AI Technical Summary

Problems solved by technology

[0003] When the functions of starter motor and magneto are combined into a single machine with conflicting requirements (i.e. high starting torque and low voltage generation at high rotational speeds (rpm), the cost of the controller scales with the high voltages these generate Increase

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