Dual motor capable of outputting three groups of equal power and inversion device

Abstract

The utility model provides a dual motor outputting three groups of equal power, which comprises a first permanent magnet generator and a second permanent magnet generator which are fixed on the input and output ends of an engine crankshaft in a one-to-one correspondence manner, the number of branches of generators in the first permanent magnet generator and the second permanent magnet generator is 3N, N is a positive integer, and N is a positive integer. The three-phase windings of the 2N branches in the first permanent magnet generator are superposed and output in a one-to-one correspondence manner to obtain a first group of output power, and the three-phase windings of the remaining N branches in the first permanent magnet generator and the three-phase windings of the N branches in the second permanent magnet generator are superposed and output in a one-to-one correspondence manner to obtain a second group of output power; and the three-phase windings of the remaining 2N branches in the third permanent magnet generator are superposed and output in a one-to-one correspondence manner to obtain a third group of output power, and the three groups of output power are equal. The utility model also provides an inversion device for outputting three groups of equipower double motors. The generators are connected to the input end and the output end of the engine crankshaft so that the crankshaft can be balanced, the service life of the crankshaft is prolonged, and reliability of the crankshaft is improved.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, specifically to a dual motor and inverter device that outputs three sets of equal power. Background Technology

[0002] Generators have wide applications in industrial and agricultural production, national defense, science and technology, and daily life. While there are many types of generators, their working principles are all based on the laws of electromagnetic induction and electromagnetic force. Therefore, the general principle of their construction is to use appropriate magnetic and electrical materials to create mutually electromagnetically inductive magnetic and electrical circuits to generate electromagnetic power and achieve energy conversion.

[0003] Currently, the crankshaft of an engine is connected to the generator rotor via a spline on the rotor support, which is then directly connected to the spline on the crankshaft and secured with a snap ring. However, the inventors of this application have discovered that existing engines only connect the generator to either the input or output end of the crankshaft. This structure causes an imbalance between the input and output ends of the crankshaft. When the generator is running, the end of the crankshaft connected to the generator will vibrate along with the generator, which can easily lead to crankshaft damage and affect its service life and reliability. Utility Model Content

[0004] To address the technical problem that existing engines only connect a generator to the input or output end of the crankshaft, resulting in an imbalance between the input and output ends, and causing the crankshaft end connected to the generator to vibrate when the generator is running, which can easily lead to crankshaft damage and affect its service life and reliability, this invention provides a dual motor with three sets of equal power outputs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A dual-motor system with three sets of equal power output includes a first permanent magnet generator and a second permanent magnet generator. The first and second permanent magnet generators are fixed one-to-one on the input and output ends of an engine crankshaft. The number of branches in both the first and second permanent magnet generators is 3N, where N is a positive integer. Each branch includes three-phase windings of U, V, and W. The U, V, and W windings of the 2N branches in the first permanent magnet generator are superimposed one-to-one to output the first set of power. The U, V, and W windings of the remaining N branches in the first permanent magnet generator and the U, V, and W windings of the N branches in the second permanent magnet generator are superimposed one-to-one to output the second set of power. The U, V, and W windings of the remaining 2N branches in the third permanent magnet generator are superimposed one-to-one to output the third set of power. The first, second, and third set of output power are equal.

[0007] Furthermore, N = 1.

[0008] This utility model also provides an inverter device for outputting three sets of equal power dual motors, including the aforementioned three sets of equal power dual motors and a three-phase inverter. The three-phase inverter includes a first processing unit that rectifies and inverts the first set of output power to output the first phase power, a second processing unit that rectifies and inverts the second set of output power to output the second phase power, and a third processing unit that rectifies and inverts the third set of output power to output the third phase power. The first phase power, the second phase power, and the third phase power are equal.

[0009] Furthermore, the first processing unit, the second processing unit, and the third processing unit include an AC-DC rectifier unit suitable for rectification processing and a DC-AC inverter unit suitable for inversion processing.

[0010] Compared with the prior art, the dual motor and inverter device with three sets of equal output power provided by this utility model fixes the first permanent magnet generator and the second permanent magnet generator one-to-one on the input and output ends of the engine crankshaft. That is, when the first permanent magnet generator is fixed on the input end of the engine crankshaft, the second permanent magnet generator is fixed on the output end of the engine crankshaft. The U, V, and W three-phase windings of the 3N branches of the generators in the first and second permanent magnet generators are superimposed to obtain three sets of equal output power. After rectification and inversion by the three-phase inverter, equal three-phase power is obtained. This application connects permanent magnet generators to both the input and output ends of the engine crankshaft. This structure balances the input and output ends of the crankshaft. When the generators are running, the balanced vibration of the generators at the input and output ends is less likely to damage the crankshaft, thus improving the crankshaft's service life and reliability. At the same time, compared to the existing method of providing three-phase power by connecting one generator to one end of the engine crankshaft, this application provides equal three-phase power using two permanent magnet generators, allowing for smaller size and weight of the two permanent magnet generators, effectively reducing the overall size and weight of the generator. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the dual motors and inverter device with three sets of equal power output provided by this utility model.

[0012] In the diagram, 1 is the first permanent magnet generator; 2 is the second permanent magnet generator; and 3 is the three-phase inverter. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0014] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Please refer to Figure 1As shown, this utility model provides a dual-motor system with three sets of equal power outputs, including a first permanent magnet generator 1 and a second permanent magnet generator 2. The first permanent magnet generator 1 and the second permanent magnet generator 2 are fixed one-to-one on the input and output ends of the engine crankshaft. Specifically, when the first permanent magnet generator 1 is fixed on the input end of the engine crankshaft, the second permanent magnet generator 2 is fixed on the output end of the engine crankshaft. The number of branches of the generators in the first permanent magnet generator 1 and the second permanent magnet generator 2 is 3N, where N is a positive integer. Each branch includes three U, V, and W axes. The first permanent magnet generator 1 uses 2N branches of U, V, and W three-phase windings, which are superimposed one-to-one to output the first set of output power. The remaining N branches of the first permanent magnet generator 1 use U, V, and W three-phase windings, which are superimposed one-to-one to output the second set of output power. The remaining 2N branches of the third permanent magnet generator 2 use U, V, and W three-phase windings, which are superimposed one-to-one to output the third set of output power. The first, second, and third set of output power are equal. Using the dual motors with three equal power outputs provided by this invention, while providing equal three-phase power, compared to existing methods that use a single permanent magnet generator, this application uses two permanent magnet generators, resulting in a smaller size and weight. For example, to provide 20kW of power, the existing design parameters for a single permanent magnet generator are a motor diameter of 280mm and a weight of 30kg, while the design parameters for both permanent magnet generators in this application are a motor diameter of 200mm and a weight of 10kg.

[0017] For a specific embodiment, please refer to Figure 1As shown, N=1, meaning that the number of branches in both the first permanent magnet generator 1 and the second permanent magnet generator 2 is 3, specifically including three branches: A, B, and C. Branch A includes three-phase windings U1, V1, and W1; branch B includes three-phase windings U2, V2, and W2; and branch C includes three-phase windings U3, V3, and W3. The three-phase windings U1, V1, and W1 in branch A and the three-phase windings U2, V2, and W2 in branch B of the first permanent magnet generator 1 are superimposed one-to-one (U1 and U2 superimposed, V1 and V2 superimposed, W1 and W2 superimposed) to obtain the output. The first set of output power is obtained by superimposing the three-phase windings U3, V3, and W3 of the remaining C branch in the first permanent magnet generator 1 and the three-phase windings U1, V1, and W1 of the A branch in the second permanent magnet generator 2 (U3 superimposed with U1, V3 superimposed with V1, and W3 superimposed with W1) to obtain the second set of output power. The third set of output power is obtained by superimposing the three-phase windings U2, V2, and W2 of the remaining B branch in the second permanent magnet generator 2 and the three-phase windings U3, V3, and W3 of the C branch (U2 superimposed with U3, V2 superimposed with V3, and W2 superimposed with W3) to obtain the third set of output power. Of course, based on the above embodiments, those skilled in the art can also set the number of branches of the generators in the first permanent magnet generator 1 and the second permanent magnet generator 2 to 6. Specifically, the three-phase windings of 4 branches in each permanent magnet generator are superimposed to obtain one set of output power, and the three-phase windings of the remaining 2 branches in the two permanent magnet generators are superimposed to obtain another set of output power, which can also achieve the dual-motor combination effect of the above embodiments.

[0018] Please refer to Figure 1 As shown, this utility model also provides an inverter device for outputting three sets of dual motors with equal power, including the aforementioned three sets of dual motors with equal power and a three-phase inverter 3. The three-phase inverter 3 includes a first processing unit that rectifies and inverts the first set of output power to output the first phase power (U phase), a second processing unit that rectifies and inverts the second set of output power to output the second phase power (V phase), and a third processing unit that rectifies and inverts the third set of output power to output the third phase power (W phase). The first phase power, the second phase power, and the third phase power are equal.

[0019] As a specific embodiment, the first processing unit, the second processing unit, and the third processing unit include an AC-DC rectifier unit suitable for rectification processing and a DC-AC inverter unit suitable for inversion processing. That is, in the first processing unit, the second processing unit, and the third processing unit, rectification processing is performed by the AC-DC rectifier unit and inversion processing is performed by the DC-AC inverter unit, respectively. The specific structure and working principle of the AC-DC rectifier unit and the DC-AC inverter unit are existing technologies well known to those skilled in the art, and therefore will not be described in detail here.

[0020] Compared with the prior art, the dual motor and inverter device with three sets of equal output power provided by this utility model fixes the first permanent magnet generator and the second permanent magnet generator one-to-one on the input and output ends of the engine crankshaft. That is, when the first permanent magnet generator is fixed on the input end of the engine crankshaft, the second permanent magnet generator is fixed on the output end of the engine crankshaft. The U, V, and W three-phase windings of the 3N branches of the generators in the first and second permanent magnet generators are superimposed to obtain three sets of equal output power. After rectification and inversion by the three-phase inverter, equal three-phase power is obtained. This application connects permanent magnet generators to both the input and output ends of the engine crankshaft. This structure balances the input and output ends of the crankshaft. When the generators are running, the balanced vibration of the generators at the input and output ends is less likely to damage the crankshaft, thus improving the crankshaft's service life and reliability. At the same time, compared to the existing method of providing three-phase power by connecting one generator to one end of the engine crankshaft, this application provides equal three-phase power using two permanent magnet generators, allowing for smaller size and weight of the two permanent magnet generators, effectively reducing the overall size and weight of the generator.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dual motor with three sets of equal power outputs, characterized in that, The system includes a first permanent magnet generator and a second permanent magnet generator, which are fixed one-to-one on the input and output ends of the engine crankshaft. Both the first and second permanent magnet generators have 3N branches, where N is a positive integer. Each branch includes three-phase windings (U, V, W). The U, V, and W windings of the 2N branches in the first permanent magnet generator are superimposed to output a first set of output power. The U, V, and W windings of the remaining N branches in the first and second permanent magnet generators are superimposed to output a second set of output power. The U, V, and W windings of the remaining 2N branches in the second permanent magnet generator are superimposed to output a third set of output power. The first, second, and third sets of output power are equal.

2. The dual motors with three sets of equal power output as described in claim 1, characterized in that, The N=1.

3. An inverter device that outputs three sets of dual motors with equal power, characterized in that, The invention includes the three sets of equal-power dual motors and three-phase inverters as described in claim 1 or 2. The three-phase inverter includes a first processing unit that rectifies and inverts the first set of output power to output the first phase power, a second processing unit that rectifies and inverts the second set of output power to output the second phase power, and a third processing unit that rectifies and inverts the third set of output power to output the third phase power. The first phase power, the second phase power, and the third phase power are equal.

4. The inverter device with three sets of equal-power dual motors as described in claim 3, characterized in that, The first processing unit, the second processing unit, and the third processing unit include an AC-DC rectifier unit suitable for rectification processing and a DC-AC inverter unit suitable for inversion processing.

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