ELECTRIC MOTOR WITH CONFIGURABLE COIL

Abstract

The invention relates to an electric motor in which the coil can be configured according to the specific needs of each case, so as to be able to play with the torque/speed ratio that it can provide at any particular moment. For this purpose, each winding of the coil that is used in the motor is divided into a predetermined number of wires (100) having the same cross-section and length, so that said wires are grouped together and insulated from one another defining a specific predetermined number of groups, the ends or poles (Al, A2, A3 . . . , U1, U2, U3, . . . ) of each group being connected to switching means, via which the wires (100) are selectively connected in multiple configurations, either all in parallel, all in series or in various intermediate combinations, thus obtaining an equivalent coil in which the equivalent cross-section and length can vary according to the connection configuration of the wires (100).

Claims

1. An electric motor with configurable coil, comprising the coil a number of windings, wherein each winding is divided into a predetermined number of wires, having all the wires the same cross-section and length, wherein the wires are grouped together in a number of groups insulated from one another and comprising each group and end and a pole, the end and poles of each group being connected to switching means equipped with selective connection means for selectively connecting the wires all in parallel, all in series, or in various intermediate combinations, and being the wires used in each winding a multiple of the number of groups into which said winding is divided.

Description

DESCRIPTION OF THE DRAWINGS

[0031] As a complement to the description that will be provided herein, and for the purpose of helping to make the features of the invention more readily understandable, according to a preferred practical exemplary embodiment thereof, said description is accompanied by a set of drawings constituting an integral part thereof in which, by way of illustration and not limitation, the following is represented:

[0032] FIG. 1 shows a diagram of four possible configurations and the results that are obtained depending on same, and offering an electric motor with a configurable coil carried out according to the object of the present invention, specifically in the present example a three-phase permanent magnet synchronous DC motor controlled by an electronic control box.

[0033] FIG. 2 shows a diagram of the connections made by the control box or switching means that will be used in the motor for the configuration (C1) shown in FIG. 1, specifically corresponding to the configuration in which it is possible to obtain the maximum speed of the motor.

[0034] FIG. 3 shows a diagram of the connections made by the control box or switching means that will be used in the motor for the configuration (C2) shown in FIG. 1,

[0035] FIG. 4 shows a diagram of the connections made by the control box or switching means that will be used in the motor for the configuration (C3) shown in FIG. 1.

[0036] FIG. 5 finally shows a diagram of the connections made by the control box or switching means that will be used in the motor for the configuration (C4) shown in FIG. 1, specifically corresponding with the configuration in which it is possible to obtain the maximum torque of the motor.

PREFERRED EMBODIMENT OF THE INVENTION

[0037] A motor based on the motor of the invention, specifically a three-phase permanent magnet synchronous DC motor controlled by an electronic control box which controls switching is described below in view of the mentioned drawings and in a merely exemplary and obviously non-limiting manner.

[0038] For each of the phases, 6 wires (100) of 1 meter in length and having a cross-section of 1 mm.sup.2 for each wire are wound on the core, said wires being duly insulated and finished at theft ends with the corresponding input and output torques (A1, A2, A3, A4, A5, A6, U1, U2, U3, U4, U5 and U6) associated with switching means, in this case controlled by an electronic control box.

[0039] Based on the management that the control box is able to carry out in relation to the connections between the input and output torques of said wires (100), the configuration of each coil B1, B2, B3, and accordingly of the motor can change considerably and thus adapt to the specific needs of each case.

[0040] Therefore, according to the first configuration (C1) provided, shown in FIGS. 1 and 2, if all the inputs A1 to AS are connected in parallel, and if the complementary outputs U1 to U6 are connected in parallel, a coil of 1 meter and having a cross-section of 6 mm.sup.2 is obtained, corresponding with the sum of the cross-section of all the wires (100) as they are connected in parallel.

[0041] This configuration enables the maximum turning speed of the motor to be obtained.

[0042] In turn, and according to the second configuration (C2) provided, shown in FIG. 3, connecting in parallel the inputs A1 to A3 and outputs U1 to U3, as well as on the other hand connecting in parallel the inputs A4 to AS and outputs U4 to U6, and connecting in series these two previously obtained subgroups, a coil of 2 m and having a cross-section of 3 mm.sup.2 is achieved, which will enable the motor to offer a higher torque than the preceding configuration, at the expense of a lower speed.

[0043] According to the third configuration (C3) provided in FIG. 4, the inputs and outputs of the wires (100) can be connected in parallel in twos, and these subgroups in turn can be connected to one another in series, so a coil of 3 m in length and having a cross-section of 2 mm.sup.2 would be obtained, which will enable the motor to offer a higher torque than the preceding configuration, at the expense of a lower speed.

[0044] Finally and according to the fourth configuration (C4) provided in the example, shown in FIG. 5, if all the wires (100) are connected in series through their terminals A/U), it results in a coil of 6 m in length and having a cross-section of 1 mm.sup.2, and in this configuration the motor enables the maximum torque to be offered.

[0045] All that remains to be indicated is that, as discussed above, since the structure of the motor is not affected as far as its poles are concerned with respect to a conventional electric motor, it can assisted by additional switching systems as far as managing its poles is concerned, without this affecting the essence of the invention.