Double-voltage switching generator and switching method

Abstract

The invention discloses a double-voltage switching generator and a switching method. The generator comprises a generator body, a front end cover and a rear end cover are arranged at the two ends of the generator body respectively, a stator and a rotor are installed in the generator body, and a wire outlet box is arranged at the top of the generator body; an exciter is further arranged in the machine body and is composed of an exciter shell, an exciter stator and an exciter rotor, and the exciter stator and the exciter rotor are arranged in the exciter shell; the device is applied to the emergency power supply vehicle, two different voltages can be switched and output according to the actual power demand on site, and the problem that the emergency power supply vehicle is only provided with one generator set with a single voltage specification, and one generator set with different voltage specifications cannot be additionally arranged due to limited space is solved. And the power utilization requirements of different power utilization places cannot be met.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and in particular to a dual-voltage switching generator and a switching method. Background Art

[0002] In the event of emergencies and natural disasters, emergency power supply vehicles can respond quickly to emergency rescue operations and provide power supply to the scene. However, the voltage specifications of electrical equipment in different power consumption sites are also different, and the emergency power supply vehicle only has a generator set with a single voltage specification. Due to limited space, it is impossible to add a generator set with a different voltage specification, resulting in the inability to meet the power demand of different power consumption sites. In response to the pain points of emergency power supply vehicles, a dual-voltage switching generator is invented. The generator can switch to output voltages of different specifications according to the power demand of different voltage specifications of the power consumption site, providing reliable emergency power supply to the local area and ensuring power supply. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a dual-voltage switching generator and a switching method, the purpose of which is to switch and output voltages of different specifications according to different electricity demands, provide a reliable emergency power supply for the local area, and ensure power supply.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-voltage switching generator, comprising a body, wherein a front cover and a rear cover are respectively arranged at both ends of the body, a stator and a rotor are installed inside the body, and an outlet box is arranged on the top of the body; an exciter is also arranged inside the body, and the exciter consists of an exciter housing, and an exciter stator and an exciter rotor arranged in the exciter housing.

[0005] Furthermore, the outlet box includes a box body arranged on the top of the machine body, a cover plate is arranged on the top of the box body, a plurality of stuffing boxes are arranged on one side of the box body, and a voltage switching switch is arranged on the other side of the box body; a first voltage regulator and a second voltage regulator are respectively arranged on the two inner side surfaces of the box body.

[0006] Furthermore, the outlet box also includes a first intermediate relay and a second intermediate relay arranged in the side wall of the box; a small wiring terminal is arranged on the outer side wall of the box, the small wiring terminal is electrically connected to the voltage switching switch, and the voltage switching switch is electrically connected to the first intermediate relay and the second intermediate relay; the box also includes a first motor voltage output copper bus, a second motor voltage output copper bus and an N line output copper bus.

[0007] Furthermore, the stator core is embedded with a first stator winding, a second stator winding and a harmonic winding, one end of the first stator winding and the second stator winding are respectively connected to the first motor voltage output copper bar and the second motor voltage output copper bar, and the other end of the first stator winding and the second stator winding are connected to the N line output copper bar; the harmonic winding is electrically connected to the first voltage regulator and the second voltage regulator through the first intermediate relay and the second intermediate relay, respectively, to form an excitation input circuit.

[0008] Furthermore, the stator of the exciter is electrically connected to the first voltage regulator and the second voltage regulator through the first intermediate relay and the second intermediate relay respectively, so as to form an excitation output circuit.

[0009] Furthermore, the voltage switching switch is electrically connected to the first voltage regulator and the first stator winding in sequence to form a first detection loop; the voltage switching switch is electrically connected to the second voltage regulator and the second stator winding to form a second detection loop.

[0010] Furthermore, a protective cover is provided on the surface of the body.

[0011] Furthermore, a bearing for the movement of the rotor is arranged on the rear end cover.

[0012] A dual voltage switching method, applied to a dual voltage switching generator, comprises the following steps:

[0013] S1: Connect the dual voltage switching generator to the small wiring terminal with an external DC24V power supply;

[0014] S2: When the voltage switch is switched to the 400V voltage position, the first intermediate relay is connected to the DC24V power supply, the relay coil of the first intermediate relay is energized, the normally open contact is closed, the harmonic winding and the exciter stator are connected to the first voltage regulator, the first voltage regulator works, detects the voltage of the first stator winding, and outputs a stable motor voltage to the first motor voltage output copper busbar to supply power to the outside;

[0015] S3: When the voltage switch is switched to the 600V voltage position, the second intermediate relay is connected to the DC24V power supply, the relay coil of the second intermediate relay is energized, the normally open contact is closed, the harmonic winding and the exciter stator are connected to the second voltage regulator, the second voltage regulator works, detects the voltage of the second stator winding, and outputs a stable motor voltage to the second motor voltage output copper busbar to provide external power.

[0016] Furthermore, when the voltage switching switch is in any position, only one path is connected to the external DC24V power supply, one intermediate relay coil is energized, one voltage regulator is connected to the harmonic coil and the exciter stator, the two voltage regulator circuits are interlocked and do not work at the same time, and the dual voltage switching generator only outputs one voltage.

[0017] Compared with the existing technology, the present invention has the following beneficial effects: when the present invention is applied to the emergency power supply vehicle, it can switch and output two different voltages of 400V and 660V according to the actual power demand on site, thereby solving the problem that there is only one generator set with a voltage specification of 400V on the emergency power supply vehicle, and it is impossible to add a generator set with a voltage specification of 660V due to limited space, resulting in the inability to meet the power demand of different voltage specifications at different power consumption sites; by interlocking the two voltage lines, it is ensured that the generator only outputs one voltage to the outside for external power supply at any time, avoiding the abnormal operation of the generator caused by the simultaneous output of two voltages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the dual voltage switching generator of the present invention.

[0019] Figure 2 This is a schematic diagram of the side structure of the dual voltage switching generator of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the outlet box of the present invention.

[0021] Figure 4 It is a schematic diagram of the internal structure of the outlet box of the present invention.

[0022] In the figure, 1, front cover; 2, protective cover; 3, stator; 4, rotor; 5, outlet box; 6, rear cover; 7, exciter stator; 8, exciter rotor; 9, bearing; 10, cover plate; 11, box body; 12, voltage switching switch; 13, stuffing box; 14, first voltage regulator; 15, first motor voltage output copper bus; 16, first intermediate relay; 17, second intermediate relay; 18, small wiring terminal; 19, N line output copper bus; 20, second voltage regulator; 21, second motor voltage output copper bus. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 2 As shown, the present invention provides a technical solution: a dual-voltage switching generator, including a body, a front cover 1 and a rear cover 6 are respectively provided at both ends of the body, a stator 3 and a rotor 4 are installed inside the body, and an outlet box 5 is provided on the top of the body; an exciter is also provided inside the body, and the exciter consists of an exciter housing, and an exciter stator 7 and an exciter rotor 8 arranged in the exciter housing.

[0024] Wherein, a protective cover 2 is arranged on the surface of the machine body.

[0025] The rear end cover 6 is provided with a bearing 9 for the movement of the rotor 4 .

[0026] like Figure 3-Figure 4As shown, the outlet box 5 includes a box body 11 arranged on the top of the body, a cover plate 10 is arranged on the top of the box body 11, a plurality of stuffing boxes 13 are arranged on one side of the box body 11, and a voltage switching switch 12 is arranged on the other side of the box body 11; the first voltage regulator 14 and the second voltage regulator 20 are arranged on the two inner side surfaces of the box body 11 respectively; the first intermediate relay 16 and the second intermediate relay 17 are also arranged in the side wall of the box body 11; a small wiring terminal 18 is arranged on the outer side wall of the box body 11, and the small wiring terminal 18 is electrically connected to the voltage switching switch 12, and the voltage switching switch 12 is electrically connected to the first intermediate relay 16 and the second intermediate relay 17; the first motor voltage output copper bus 15, the second motor voltage output copper bus 21 and the N line output copper bus 19 are also arranged in the box body 11.

[0027] Among them, the core of the stator 3 is embedded with the first stator winding, the second stator winding and the harmonic winding, one end of the first stator winding and the second stator winding are respectively connected to the first motor voltage output copper bar 15 and the second motor voltage output copper bar 21, and the other end of the first stator winding and the second stator winding are connected to the N line output copper bar 19; the harmonic winding is electrically connected to the first voltage regulator 14 and the second voltage regulator 20 through the first intermediate relay 16 and the second intermediate relay 17, respectively, to form an excitation input circuit.

[0028] The exciter stator 7 is electrically connected to the first voltage regulator 14 and the second voltage regulator 20 through the first intermediate relay 16 and the second intermediate relay 17 respectively, so as to form an excitation output circuit.

[0029] The voltage switching switch 12 is electrically connected to the first voltage regulator 14 and the first stator winding in sequence to form a first detection loop; the voltage switching switch 12 is electrically connected to the second voltage regulator 20 and the second stator winding to form a second detection loop.

[0030] A dual voltage switching method comprises the following steps:

[0031] Connect the dual voltage switching generator to the external DC24V power supply to the small terminal 18.

[0032] When the voltage switching switch 12 is switched to the 400V voltage position, the first intermediate relay 16 is connected to the DC24V power supply, the relay coil of the first intermediate relay 16 is energized, the normally open contact is closed, the harmonic winding and the exciter stator 7 are connected to the first voltage regulator 14, the first voltage regulator 14 works, detects the voltage of the first stator winding, and outputs a stable motor voltage to the first motor voltage output copper bus 15 to supply power to the outside.

[0033] When the voltage switching switch 12 is switched to the 600V voltage position, the second intermediate relay 17 is connected to the DC24V power supply, the relay coil of the second intermediate relay 17 is energized, the normally open contact is closed, the harmonic winding and the exciter stator 7 are connected to the second voltage regulator 20, the second voltage regulator 20 works, detects the voltage of the second stator winding, and outputs a stable motor voltage to the second motor voltage output copper bus 21 to supply power to the outside.

[0034] When the voltage switching switch 12 is in any position, only one path is connected to the external DC24V power supply, so only one intermediate relay coil is energized, and only one voltage regulator is connected to the harmonic coil and the exciter stator 7. The two voltage regulator circuits are interlocked and do not work at the same time. The dual voltage switching generator only outputs one voltage.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual voltage switching generator, comprising a body, characterized in that: The two ends of the machine body are respectively provided with a front cover (1) and a rear cover (6); a stator (3) and a rotor (4) are installed inside the machine body; an outlet box (5) is arranged on the top of the machine body; an exciter is also arranged inside the machine body, and the exciter consists of an exciter housing, and an exciter stator (7) and an exciter rotor (8) arranged in the exciter housing.

2. A dual voltage switching generator according to claim 1, characterized in that: The outlet box (5) comprises a box body (11) arranged on the top of the machine body, a cover plate (10) is arranged on the top of the box body (11), a plurality of stuffing boxes (13) are arranged on one side of the box body (11), and a voltage switching switch (12) is arranged on the other side of the box body (11); a first voltage regulator (14) and a second voltage regulator (20) are respectively arranged on two side surfaces inside the box body (11).

3. A dual voltage switching generator according to claim 2, characterized in that: The outlet box (5) further comprises a first intermediate relay (16) and a second intermediate relay (17) arranged in the side wall of the box body (11); a small wiring terminal (18) is arranged on the outer side wall of the box body (11); the small wiring terminal (18) is electrically connected to the voltage switching switch (12); the voltage switching switch (12) is electrically connected to the first intermediate relay (16) and the second intermediate relay (17); and a first motor voltage output copper bar (15), a second motor voltage output copper bar (21) and an N line output copper bar (19) are also arranged in the box body (11).

4. A dual voltage switching generator according to claim 3, characterized in that: The stator (3) has an iron core embedded with a first stator winding, a second stator winding and a harmonic winding; one end of the first stator winding and the second stator winding are respectively connected to a first motor voltage output copper bar (15) and a second motor voltage output copper bar (21); the other ends of the first stator winding and the second stator winding are connected to an N-line output copper bar (19); the harmonic winding is respectively electrically connected to a first voltage regulator (14) and a second voltage regulator (20) via a first intermediate relay (16) and a second intermediate relay (17) to form an excitation input circuit.

5. A dual voltage switching generator according to claim 4, characterized in that: The exciter stator (7) is electrically connected to the first voltage regulator (14) and the second voltage regulator (20) respectively through the first intermediate relay (16) and the second intermediate relay (17), so as to form an excitation output circuit.

6. A dual voltage switching generator according to claim 5, characterized in that: The voltage switching switch (12) is electrically connected to the first voltage regulator (14) and the first stator winding in sequence to form a first detection loop; the voltage switching switch (12) is electrically connected to the second voltage regulator (20) and the second stator winding to form a second detection loop.

7. The dual voltage switching generator according to claim 1, characterized in that: A protective cover (2) is provided on the surface of the machine body.

8. The dual voltage switching generator according to claim 1, characterized in that: The rear end cover (6) is provided with a bearing (9) for the movement of the rotor (4).

9. A dual voltage switching method, applied to a dual voltage switching generator according to any one of claims 1 to 8, characterized in that: The steps include: S1: Connect the dual voltage switching generator to the small wiring terminal (18) with an external DC24V power supply; S2: When the voltage switching switch (12) is switched to the 400V voltage position, the first intermediate relay (16) is connected to the DC24V power supply, the relay coil of the first intermediate relay (16) is energized, the normally open contact is closed, the harmonic winding and the exciter stator (7) are connected to the first voltage regulator (14), the first voltage regulator (14) works, detects the voltage of the first stator winding, and outputs a stable motor voltage to the first motor voltage output copper bus (15) to supply power to the outside; S3: When the voltage switching switch (12) is switched to the 600V voltage position, the second intermediate relay (17) is connected to the DC24V power supply, the relay coil of the second intermediate relay (17) is energized, the normally open contact is closed, the harmonic winding and the exciter stator (7) are connected to the second voltage regulator (20), the second voltage regulator (20) works, detects the voltage of the second stator winding, and outputs a stable motor voltage to the second motor voltage output copper bus (21) to supply power to the outside.

10. A dual voltage switching method according to claim 9, characterized in that: When the voltage switching switch (12) is in any position, only one path is connected to the external DC24V power supply, an intermediate relay coil is energized, a voltage regulator is connected to the harmonic coil and the exciter stator (7), the two voltage regulator circuits are interlocked and do not work at the same time, and the dual voltage switching generator only outputs one voltage.

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