Generator

Abstract

The embodiment of the utility model provides a generator, and relates to the technical field of power generation. The generator comprises at least two winding modules; each winding module comprises a winding unit, a switch unit and a rectification unit, and the winding unit is connected with the input end of the rectification unit through the switch unit; the output ends of all the rectification units are connected in series. When the rotating speed is low, the outputs of the winding modules can be connected in series to form a voltage superposition effect, and the winding modules work together at the lowest rotating speed, so that high power can be output.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power generation, and relates to a generator. BACKGROUND

[0002] The existing permanent magnet generator cannot adapt to a wide speed range. For example, when a vehicle-mounted traveling power generation is performed, the rotating speed range of a prime mover is 750 r / min to 3300 r / min; the highest rotating speed is 4.4 times the lowest rotating speed; according to the characteristics of the permanent magnet generator, the output voltage of the generator also has a 4.4 times relationship; when the highest voltage value is limited, the lowest voltage value is also limited; since the output current of the generator cannot exceed the rated current, at the lowest rotating speed, a higher power cannot be output, and the power density of the generator is limited.

[0003] Therefore, how to output a higher power at the lowest rotating speed is a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a generator to solve the technical problem of how to output a higher power at the lowest rotating speed.

[0005] To achieve the above object, the embodiments of the application adopt the following technical scheme.

[0006] In a first aspect, the embodiments of the application provide a generator, which comprises at least two winding modules.

[0007] Each winding module comprises a winding unit, a switch unit and a rectifier unit, the winding unit is connected to the input end of the rectifier unit through the switch unit;

[0008] The output ends of all the rectifier units are connected in series.

[0009] Optionally, in each winding module:

[0010] The winding unit comprises a first-phase winding, a second-phase winding and a third-phase winding;

[0011] The switch unit comprises a first switch, a second switch and a third switch;

[0012] The first-phase winding is connected to the first input end of the rectifier unit through the first switch;

[0013] The second-phase winding is connected to the second input end of the rectifier unit through the second switch;

[0014] The third-phase winding is connected to the third input end of the rectifier unit through the third switch.

[0015] Optionally, in each winding module:

[0016] The rectifier unit comprises a first rectifier circuit, a second rectifier circuit and a third rectifier circuit;

[0017] The first rectifier circuit comprises a first diode and a second diode connected in series;

[0018] The second rectifier circuit comprises a third diode and a fourth diode connected in series;

[0019] The third rectifier circuit comprises a fifth diode and a sixth diode connected in series;

[0020] The first rectifier circuit, the second rectifier circuit and the third rectifier circuit are connected in parallel, and two ends after the parallel connection serve as two output ends of the rectifier unit;

[0021] The first phase winding is connected to a connection point of the first diode and the second diode through the first switch;

[0022] The second phase winding is connected to a connection point of the third diode and the fourth diode through the second switch;

[0023] The third phase winding is connected to a connection point of the fifth diode and the sixth diode through the third switch.

[0024] Optionally, a first capacitor is connected between the two output ends of each rectifier unit.

[0025] Optionally, the generator further comprises a second capacitor;

[0026] The output ends of all the rectifier units are connected in series and then connected in parallel with the second capacitor.

[0027] Optionally, the generator comprises a front end cover, a rear end cover and a water-cooled machine base;

[0028] The front end cover, the water-cooled machine base and the rear end cover are connected in sequence and form a closed waterproof structure.

[0029] Optionally, an outer shell of the water-cooled machine base is provided with a water-cooled loop, and a length of the water-cooled loop is greater than a length of the water-cooled machine base and comprises a plurality of bends.

[0030] Optionally, the winding modules are all stator windings.

[0031] Optionally, a stator of the generator is provided with a core slot, and the core slot is embedded with two winding modules.

[0032] Optionally, a rotor of the generator is a permanent magnet rotor, and the permanent magnet rotor comprises a rotor core embedded with a magnetic steel.

[0033] Compared with the prior art, the application has the following beneficial effects:

[0034] The generator provided in this application embodiment has multiple winding modules. At low speeds, the outputs of the multiple winding modules can be connected in series to form a voltage superposition effect. At the lowest speed, the multiple winding modules work together, thus outputting higher power. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a generator including two winding modules provided for an embodiment of this application;

[0037] Figure 2 A schematic diagram of a generator comprising three winding modules provided for an embodiment of this application;

[0038] Figure 3 A schematic diagram illustrating an embodiment of a single winding module provided in this application;

[0039] Figure 4 This is a schematic diagram illustrating an embodiment of a rectifier unit provided in this application. The rectifier unit includes six diodes.

[0040] Figure 5 A schematic diagram of a winding module consisting of a three-phase winding, a relay, and a rectifier diode is provided for an embodiment of this application;

[0041] Figure 6 A schematic diagram illustrating an embodiment of this application of two winding modules connected in series;

[0042] Figure 7 A schematic diagram illustrating an embodiment of this application in which two winding modules are connected in series and then in parallel with a second capacitor;

[0043] Figure 8 This is a schematic diagram of the housing structure of a generator provided in an embodiment of this application. The front cover, rear cover, and water-cooled base form a closed waterproof structure.

[0044] Figure 9 A half-sectional view of a generator provided in an embodiment of this application;

[0045] Figure 10 for Figure 9 A partial sectional view of the generator shown from a top view.

[0046] Reference Signs List:

[0047] 1, rotating shaft

[0048] 2, front end cover

[0049] 3, bearing

[0050] 4, water-cooled machine base

[0051] 5, stator core

[0052] 6, rotor core

[0053] 7, magnetic steel

[0054] 8, rear end cover DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The described embodiments are some embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described in the drawings can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0057] In the description of the present application, it should be noted that:

[0058] The relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations;

[0059] “Connection” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium.

[0060] The existing generator cannot output higher power at a lower rotating speed.

[0061] In order to overcome the above problems, the embodiments of the present application provide a generator, which comprises at least two winding modules.

[0062] Each winding module includes a winding unit, a switch unit and a rectifier unit, the winding unit connects the input end of the rectifier unit through the switch unit. The output ends of all rectifier units are connected in series.

[0063] Figure 1 The embodiment of the generator including two winding modules is shown, Figure 2 The embodiment of the generator including three winding modules is shown.

[0064] The output voltage of each winding module can be the same, and the output voltage of a single winding module is denoted as V1, V1 is larger at a higher rotating speed and smaller at a lower rotating speed.

[0065] For the embodiment shown, Figure 1 V1 is large enough at a higher rotating speed, and a single winding module can output sufficient power; V1 is smaller at a lower rotating speed, and two winding modules can output a voltage of 2V1, thereby outputting sufficient power.

[0066] For the embodiment shown, Figure 2 V1 is smaller at a lower rotating speed, and two winding modules can be connected in series to output a voltage of 2V1, and three winding modules can be connected in series to output a voltage of 3V1.

[0067] The output voltage of each winding module can be different, and the output voltages of the winding modules are denoted as V1, V2 and V3, for the embodiment shown, Figure 2 V1, V2, V3, V1+V2, V2+V3, V1+V3 and V1+V2+V3 can be output, that is, more different combinations of voltage outputs can be formed.

[0068] Figure 3 The embodiment of a single winding module is shown, and each winding module includes:

[0069] The winding unit includes a first-phase winding, a second-phase winding and a third-phase winding;

[0070] The switch unit includes a first switch, a second switch and a third switch.

[0071] As shown in Figure 3 , the phase windings and the switches have the following connection relationship:

[0072] The first-phase winding is connected to the first input end of the rectifier unit through the first switch;

[0073] The second-phase winding is connected to the second input end of the rectifier unit through the second switch;

[0074] The third-phase winding is connected to the third input end of the rectifier unit through the third switch.

[0075] Figure 4 An embodiment of a rectifier unit is shown, which can include three circuit units, named as first rectifier circuit, second rectifier circuit and third rectifier circuit respectively, each of which includes two diodes:

[0076] The first rectifier circuit includes first diode D 11 and second diode D 14 in series;

[0077] The second rectifier circuit includes third diode D 12 and fourth diode D 15 in series;

[0078] The third rectifier circuit includes fifth diode D 13 and sixth diode D 16 in series.

[0079] The first rectifier circuit, the second rectifier circuit and the third rectifier circuit are connected in parallel, and the two ends after being connected in parallel are two output ends of the rectifier unit.

[0080] In each rectifier circuit, the connection point of the two diodes is an input end of the rectifier unit:

[0081] The connection point of first diode D 11 and second diode D 14 is the first input end of the rectifier unit;

[0082] The connection point of third diode D 12 and fourth diode D 15 is the second input end of the rectifier unit;

[0083] The connection point of fifth diode D 13 and sixth diode D 16 is the third input end of the rectifier unit.

[0084] As Figure 4 the first phase winding is connected to the connection point of first diode D 11 and second diode D 14 through a first switch;

[0085] the second phase winding is connected to the connection point of third diode D 12 and fourth diode D 15 through a second switch;

[0086] the third phase winding is connected to the connection point of fifth diode D 13 and sixth diode D 16 through a third switch.

[0087] As Figure 5Each phase winding, i.e. the inductance A1, B1, C1 in the figure, the first switch, the second switch and the third switch can be controlled by a relay K1 at the same time, i.e. when one of the first switch, the second switch and the third switch is turned on, the other two are also turned on at the same time, and when one of the first switch, the second switch and the third switch is turned off, the other two are also turned off at the same time.

[0088] A first capacitor C1 can be connected between the two output terminals of the rectifying unit.

[0089] Figure 6 An embodiment schematic diagram of two winding modules in series is shown, and a capacitor can be connected between the two output terminals of each rectifying unit.

[0090] The output terminals of all rectifying units can be connected in series and in parallel with a second capacitor, Figure 7 An embodiment of two winding modules in series and in parallel with a second capacitor is shown, and the output terminals of two rectifying units are connected in series and in parallel with a second capacitor C2.

[0091] Figure 8 An embodiment of the shell structure of the generator is shown, and the generator can include a front end cover, a rear end cover and a water-cooled machine base.

[0092] The front end cover, the water-cooled machine base and the rear end cover are connected in sequence and form a closed waterproof structure, and the fully enclosed structure can meet the water requirement of the generator.

[0093] Figure 9 A semi-sectional view of the generator is shown, which includes a rotating shaft 1, a front end cover 2, a bearing 3, a water-cooled machine base 4, a stator core 5, a rotor core 6, a magnetic steel 7 and a rear end cover 8. The winding modules described above can be stator windings, and the winding modules described above are arranged on the stator core 5.

[0094] A core slot can be formed in the stator, and two or more winding modules can be embedded in the core slot. For example, the number of winding modules is two, and the two winding modules can be the same and independent three-phase windings.

[0095] The generator can adopt the form of a permanent magnet synchronous generator. The rotor of the generator can be a permanent magnet rotor, which can be formed by embedding a magnetic steel into a rotor core.

[0096] Figure 10 A partial sectional view of the generator from the top direction is shown, Figure 9 A partial sectional view of the generator from the top direction is shown, Figure 10 A schematic diagram of the internal waterway of the water-cooled machine base is shown, and the length of the water cooling circuit is greater than the length of the water-cooled machine base and includes multiple bends. The water cooling circuit can be arranged in a winding manner and has multiple S-shaped bends.

[0097] The water inlet and outlet of the water-cooled machine base can be arranged at the rear end of the generator, facilitating the connection of pipelines. Through the water channel on the inner surface of the generator shell, the flowing water will take away the heat on the surface of the machine base, i.e. water-cooling heat dissipation, so as to reduce the temperature of the generator. An interface for installing a temperature sensor can also be arranged above the generator.

[0098] The scheme of the generator can be used for a power take-off generator. The working principle is as follows: the rotation speed range of the prime mover is 750-3300 r / min, and after the transmission mechanism, the rotation speed of the power take-off generator becomes 1650-7260 r / min. It can be seen that the highest rotation speed is 4.4 times of the lowest rotation speed, and the voltage output by the power take-off generator also has a 4.4 times relationship. The low rotation speed will make it difficult for the highest voltage to meet the requirements of the power take-off controller. In order to solve this problem, for example, Figure 7 , the stator winding of the power take-off generator is designed as two sets of windings, one set being A1, B1 and C1, and the other set being A2, B2 and C2.

[0099] When the rotation speed of the power take-off generator is low (for example, defined as 1650-3300 r / min), the two sets of windings (A1, B1, C1 and A2, B2, C2) work at the same time, are rectified by the rectifier bridge respectively, are connected in series and output externally, thereby improving the output voltage value and meeting the output power requirement at the low rotation speed.

[0100] When the rotation speed of the generator is high (for example, defined as 3300-7260 r / min), only one set of windings (A1, B1, C1 or A2, B2, C2) works. At this time, the output voltage will not be too high due to the high rotation speed, is rectified by the rectifier bridge, is output externally and meets the output power requirement at the high rotation speed.

[0101] The device and system embodiments described above are only illustrative, and part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0102] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical range disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A generator, characterized in that, Includes at least two winding modules; Each winding module includes a winding unit, a switching unit, and a rectifier unit, wherein the winding unit is connected to the input terminal of the rectifier unit via the switching unit; The outputs of all the rectifier units are connected in series.

2. The generator as described in claim 1, characterized in that, In each of the winding modules: The winding unit includes a first phase winding, a second phase winding, and a third phase winding; The switching unit includes a first switch, a second switch, and a third switch; The first phase winding is connected to the first input terminal of the rectifier unit via the first switch; The second phase winding is connected to the second input terminal of the rectifier unit via the second switch; The third phase winding is connected to the third input terminal of the rectifier unit via the third switch.

3. The generator as described in claim 2, characterized in that, In each of the winding modules: The rectifier unit includes a first rectifier circuit, a second rectifier circuit, and a third rectifier circuit; The first rectifier circuit includes a first diode and a second diode connected in series; The second rectifier circuit includes a third diode and a fourth diode connected in series; The third rectifier circuit includes a fifth diode and a sixth diode connected in series; The first rectifier circuit, the second rectifier circuit, and the third rectifier circuit are connected in parallel, and the two ends of the parallel connection serve as the two output terminals of the rectifier unit. The first phase winding is connected to the connection point of the first diode and the second diode via the first switch; The second phase winding is connected to the connection point of the third diode and the fourth diode via the second switch; The third phase winding is connected to the connection point of the fifth diode and the sixth diode via the third switch.

4. The generator as described in claim 1, characterized in that, A first capacitor is connected between the two output terminals of each rectifier unit.

5. The generator as described in claim 1, characterized in that, The generator also includes a second capacitor; The output terminals of all the rectifier units are connected in series and then connected in parallel with the second capacitor.

6. The generator as described in claim 1, characterized in that, The generator includes a front cover, a rear cover, and a water-cooled base; The front cover, the water-cooled base, and the rear cover are connected in sequence to form a closed, waterproof structure.

7. The generator as described in claim 6, characterized in that, The outer shell of the water-cooled base is provided with a water-cooling circuit, the length of which is greater than the length of the water-cooled base and includes multiple bends.

8. The generator as claimed in claim 1, characterized in that, All winding modules are stator windings.

9. The generator as described in claim 8, characterized in that, The stator of the generator is provided with core slots, and two winding modules are embedded in the core slots.

10. The generator as claimed in claim 1, characterized in that, The generator's rotor is a permanent magnet rotor, which includes a rotor core with embedded magnets.

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