Electric road motor vehicle with switchable winding electric motor propulsion system
First Claim
1. An electric road motor vehicle comprising:
- a chassis;
a plurality of wheels being rotationally mounted on said chassis;
a plurality of road vehicle tires being disposed on corresponding ones of said plurality of wheels;
an electric motor assembly for driving said wheels to propel said electric road motor vehicle;
said electric motor assembly comprising;
an electric motor for driving at least one of said wheels of said electric road motor vehicle, said electric motor comprising a plurality of phase windings;
a plurality of switches for selectively switching said electric motor, during operation of said electric motor, between a first operating state, wherein said electric motor assumes a first set of at least one operating parameter, and a second operating state, wherein said electric motor assumes a second set of at least one operating parameter;
said plurality of switches each having;
a first contact portion;
a second contact portion; and
switch portion means, said switch portion means being movable between said first and second contact portions to selectively contact either of said first and second contact portions;
converter means for providing electrical power to said plurality of switches, said converter means having means for receiving direct-current electrical power and converting said received direct-current electrical power to alternating-current electrical power to be supplied to said electric motor;
said electrical power to be supplied to said plurality of switches comprising electric currents having amplitudes;
means for controlling said switches between said first and second operating states;
said controlling means comprising means for controlling said converter means and for selectively reducing said amplitudes of at least said electric currents provided to said plurality of switches; and
wherein said means for controlling said converter means comprises means for reducing, during switching of said electric motor between said first and second operating states, said amplitudes of said electric currents provided to said plurality of switches.
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Accused Products
Abstract
An electric road motor vehicle with a switchable winding electric motor propulsion system, a switchable winding electric motor propulsion system in an electric road motor vehicle, and a switchable winding electric motor propulsion system for a motor vehicle. For the optimization of an electric motor propulsion system of a vehicle, the electric motor equipped with a rotary field winding is connected through a switching system to an electronic converter, so that due to the switching system, the number of phase windings of the rotary field winding to be connected to the individual output connections can be changed. The switching system is controlled by a control circuit through a actuator. The control circuit also controls the converter and deactivates the driver currents fed to the rotary field winding, while it switches over the switching system through the actuator. The switching system can thereby be made simpler and smaller. The switching system including the actuator is combined into a unit with the electric motor.
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Citations
23 Claims
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1. An electric road motor vehicle comprising:
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a chassis; a plurality of wheels being rotationally mounted on said chassis; a plurality of road vehicle tires being disposed on corresponding ones of said plurality of wheels; an electric motor assembly for driving said wheels to propel said electric road motor vehicle; said electric motor assembly comprising; an electric motor for driving at least one of said wheels of said electric road motor vehicle, said electric motor comprising a plurality of phase windings; a plurality of switches for selectively switching said electric motor, during operation of said electric motor, between a first operating state, wherein said electric motor assumes a first set of at least one operating parameter, and a second operating state, wherein said electric motor assumes a second set of at least one operating parameter; said plurality of switches each having; a first contact portion; a second contact portion; and switch portion means, said switch portion means being movable between said first and second contact portions to selectively contact either of said first and second contact portions; converter means for providing electrical power to said plurality of switches, said converter means having means for receiving direct-current electrical power and converting said received direct-current electrical power to alternating-current electrical power to be supplied to said electric motor; said electrical power to be supplied to said plurality of switches comprising electric currents having amplitudes; means for controlling said switches between said first and second operating states; said controlling means comprising means for controlling said converter means and for selectively reducing said amplitudes of at least said electric currents provided to said plurality of switches; and wherein said means for controlling said converter means comprises means for reducing, during switching of said electric motor between said first and second operating states, said amplitudes of said electric currents provided to said plurality of switches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification