Double-speed fault-tolerant multi-module permanent magnet journal sticking generator

Abstract

The utility model discloses a double-speed fault-tolerant multi-module permanent magnet journal sticking generator, which comprises a power generation winding which is divided into two sections or two groups which are respectively defined as a section head with a sequence number of 1 and a section tail with a sequence number of 2; the first outgoing line of the split with the sequence number 1 is a star point, a U1 + line, a V1 + line and a W1 + line, and the star point is formed by connecting U1-, V1-and W1-together; the split tail outgoing lines with the serial number 2 are U2 +, U2-, V2 +, V2-, W < 2 + > and W < 2->; wherein a second switch is arranged between the U1 +, the V1 + and the W1 + and the U2 +, the V2 + and the W2 +; a first switch is arranged between the U1 +, the V1 + and the W1 + and the U2-, the V2-and the W2-; and a third switch is arranged between the star point and the U2-, V2-and W2-. Under the same load, the current can be reduced by increasing the voltage, the loss is reduced, and the motor efficiency is improved. Due to the modular design, the main circuit can be disconnected when a fault occurs, and the capacity is reduced for use; and the generator can also be used as a module standby machine to ensure that the generator can quickly meet a full-power operation state.

Description

Technical Field

[0001] The present invention relates to a manufacturing technology of a marine shaft-belt generator, and more particularly to a marine shaft-belt permanent magnet shaft-engaging generator. Background Art

[0002] The main power of the shaft generator comes from the ship's main shaft. The speed of the main shaft determines the speed of the generator, that is, the ship's sailing speed determines the speed of the generator. The output terminal voltage of the permanent magnet generator at different speeds is proportional to the speed. The back electromotive force of the existing permanent magnet generator is fixed. The speed range is the range of the terminal voltage. When the speed range is 0~n n (rated speed), the output voltage range is 0~U n (rated voltage).

[0003] During navigation, a ship's speed fluctuates slightly. Generally, the speed range remains relatively constant. However, in exceptional circumstances, such as inclement weather or uncontrollable obstacles along the route, the ship must reduce its speed, which in turn reduces the motor's operating speed. The magnetic field of a permanent magnet generator is generated by permanent magnets. Voltage fluctuations within the same permanent magnet generator primarily stem from the motor's speed. When the speed fluctuation range is large, the voltage fluctuation range also increases. To ensure the normal operation of the power supply system, the operating voltage range of the converter must be increased, which increases converter costs. Furthermore, converters with a wide operating voltage range are uncommon due to technological immaturity.

[0004] Because ocean-going vessels typically spend extended periods at sea, they place high demands on the reliability of their electromechanical equipment. In the event of a malfunction, the faulty equipment must be detached and removed within three hours to avoid placing additional load on the main engine. Traditional split-half permanent magnet shaft-locked generators, which utilize a single electromagnetic unit, can render the entire generator inoperable in the event of a malfunction. Any failure necessitates abandonment, posing a significant safety risk. Summary of the Invention

[0005] In response to the above problems, the present invention provides a marine shaft-mounted permanent magnet generator with strong fault tolerance and adjustable voltage fluctuation range. The invention aims to:

[0006] First, under the premise of meeting the host capacity, a multi-modular design is adopted, which can reduce the capacity in case of failure to ensure the normal use of other modules and maximize the use of the generator;

[0007] Secondly, the multi-module unit structure enables the interchange and addition and removal of different sub-module units. The use of modular units as backup equipment during navigation facilitates maintenance and replacement, reducing usage and maintenance costs.

[0008] Third, the single module has a two-petal structure, and the connection between the two petals adopts external wiring. The back electromotive force constant of the motor (the voltage value output by the motor at a speed of 1000r / min=1krpm, the back electromotive force coefficient voltage is V / krmp) can be changed by connecting the two petals of the motor winding in series and parallel, and the output voltage variation range can be reduced at high and low speeds.

[0009] Therefore, the dual-speed fault-tolerant multi-module permanent magnet shaft-locking generator of the present invention has the characteristics of ample time for emergency repair of faults and low cost. Increasing the voltage under the same load can reduce the current, reduce losses, and improve the efficiency of the motor.

[0010] To achieve the above-mentioned object, the present invention provides a dual-speed fault-tolerant multi-module permanent magnet shaft-enclosing generator, comprising a generating winding, wherein the generating winding is divided into two lobe windings that together encircle the main shaft or two sets of annular windings parallel to the main shaft, thereby constituting the main and auxiliary modules 1 and 2, which are defined as the first lobe of the sequence number 1 and the tail lobe of the sequence number 2, respectively;

[0011] The first outgoing line of the 1st petal is the star point, U 1+ 、V 1+ 、W 1+ Four lines, the star point is U 1- 、V 1- 、W 1- Connect together to form;

[0012] The tail line of No. 2 is U 2+ 、U 2- 、V 2+ 、V 2- 、W 2+ 、W 2- ;

[0013] in,

[0014] U 1+ 、V 1+ 、W 1+ with U 2+ 、V 2+ 、W 2+ A second switch is provided between the two terminals;

[0015] U 1+ 、V 1+ 、W 1+ with U 2- 、V 2- 、W 2- A first switch is provided between the

[0016] Star Point and U 2- 、V 2- 、W 2- A third switch is provided between them.

[0017] In a preferred embodiment, in the dual-speed fault-tolerant multi-module permanent magnet shaft-holding generator of the present invention, the first switch, the second switch, and the third fast switch are relays KM1, KM2, and KM3, respectively; KM1, KM2, and KM3 are interlocked; and K1 is electrically connected to select series and parallel connection.

[0018] When K1 is connected in series, KM2 and KM3 are in the disconnected state, and KM1 is closed;

[0019] When K1 is connected in parallel, after KM1 is disconnected, KM2 and KM3 enter the closed state.

[0020] The dual-speed fault-tolerant multi-module permanent magnet shaft generator of the present invention can convert between two speeds. Within the range of 25% of the rated speed and 100% of the rated speed, it can ensure that the output terminal voltage is above 50% of the rated voltage, narrowing the variation range of the terminal voltage and reducing the requirements of the converter. Under the same load, increasing the voltage can reduce the current, reduce the loss, and improve the efficiency of the motor. The modular design allows for independent detection and independent operation. In the event of a fault, the main circuit connection can be disconnected and the capacity can be reduced. It can also be used as a modular standby machine. The corresponding number of modules can be connected in parallel according to the actual application. The standby machine switch is in the off state. When other modules fail and are disconnected, the modular standby machine can be added to the main circuit to ensure that the generator can quickly meet the full power operation state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of a connection method for realizing the output circuit of the multi-module permanent magnet shaft-locking generator.

[0022] Figure 2 This is a schematic diagram of the second connection method for realizing the output circuit of a multi-module permanent magnet shaft-locked generator.

[0023] Figure 3 It is a schematic diagram of a further expanded form of a multi-module permanent magnet shaft generator. DETAILED DESCRIPTION

[0024] The present invention discloses a dual-speed fault-tolerant multi-module permanent magnet shaft-holding generator, the main body of which is composed of more than two main and auxiliary modular units, and each module is divided into two lobes.

[0025] Each module consists of two petals, which can be divided into upper and lower petals (two petals surrounding the main axis) or left and right petals (two groups parallel to the left and right on the main axis). The two petals are divided into the first petal numbered 1 and the last petal numbered 2.

[0026] The first outgoing line of the 1st petal is the star point, U 1+ 、V 1+ 、W 1+ Four lines, the star point is U 1- 、V 1- 、W 1-connected together to form;

[0027] The tail line of No. 2 is U 2+ 、U 2- 、V 2+ 、V 2- 、W 2+ 、W 2- ;

[0028] When the ship is operating normally, the No. 1 petal bow and No. 2 petal tail adopt a parallel structure, that is, U 1+ 、V 1+ 、W 1+ Respectively with U 2+ 、V 2+ , W2 are connected in parallel as the final output terminal, U 2- 、V 2- 、W 2- After connecting together, connect to the star point of the first petal of sequence number 1, and set the back EMF constant to U k , when the ship is operating normally, the corresponding operating speed of the motor is n n , the unit of speed is rpm, then at normal sailing speed, the output voltage U at both ends of the motor is n =U k *n n / 1000;

[0029] When the ship's operating speed drops to half of the normal operating speed or less, the No. 1 flap bow and No. 2 flap tail adopt a series structure, that is, U 1+ 、V 1+ 、W 1+ Respectively with U 2- 、V 2- 、W 2- Connect, U 2+ 、V 2+ , W2 is the final output terminal, at this time the motor's back electromotive force constant is 2 times U k， That is, 2Uk, when the ship is operating at half normal speed, the corresponding motor speed is 1 / 2n n , when the ship is sailing at half speed, the output voltage across the motor is 2U k *(1 / 2n n ) / 1000=U k *n n / 1000=U n That is, when running at half speed, changing the back EMF constant of the permanent magnet motor by connecting the windings in series can ensure that the output voltage of the motor is the same as when running at normal speed;

[0030] For generators using dual-speed modules, the winding connection method can be adjusted according to the above method. The voltage output range is shown in the table below, where U n is the rated voltage of the motor, nn is the rated speed of the motor:

[0031]

[0032] Example 1: Implemented circuit 1, such as Figure 1 shown.

[0033] 1) When connected in series, Q1 is closed and Q2 and Q3 are open.

[0034] 2) When connected in parallel, Q2 and Q3 are closed and Q1 is open.

[0035] Q1, Q2, and Q3 are manual mechanical switches, not electrically closed. There are no electrical switches in the circuit and manual on-site operation is required. They can be used in high-vibration and high-swing operating environments and are not prone to malfunctions due to complex working environments.

[0036] Example 2: Implementing Circuit 2, such as Figure 2 shown.

[0037] 1) When connected in series, KM1 is closed, and KM2 and KM3 are open.

[0038] 2) When connected in parallel, KM2 and KM3 are closed and KM1 is open.

[0039] KM1, KM2, and KM3 are relays, electrical switches that can be controlled by a PLC or other system. KM1, KM2, and KM3 can be interlocked. K1 selects series or parallel connection. When K1 is in series mode, and KM2 and KM3 are disconnected, KM1 closes, entering series connection mode. When K1 is in parallel mode, KM1 disconnects, closing KM2 and KM3. This facilitates operation and is suitable for relatively stable routes, preventing false operation caused by high vibration and other environmental factors.

[0040] The present invention can be further expanded as follows: Figure 3 As shown, the dual-speed, fault-tolerant, multi-module permanent magnet shaft-engaging generator includes generator windings divided into n lobes or n parallel groups surrounding the main shaft, forming modules 1, 2, 3, ..., and n. After completing the individual wiring described above, modules 1, 2, 3, ..., and n are integrated into the main wiring. In the event of a fault, switches Q1, Q2, Q3, ..., and Qn (see the figure below) can be disconnected for individual testing. Once the faulty unit is identified, the corresponding switch remains disconnected, and the remaining module switches are closed. Although the generator's total generating capacity is reduced, it can continue to operate at a reduced load, improving generator utilization and achieving fault tolerance.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A dual-speed fault-tolerant multi-module permanent magnet shaft-locking generator, comprising a generating winding, characterized in that: The power generation winding is divided into two lobe windings that together form a main shaft or two sets of annular windings parallel to the main shaft, thereby forming module 1 and module 2, which are defined as the first lobe of sequence number 1 and the tail lobe of sequence number 2 respectively; The first outgoing line of the 1st petal is the star point, U 1+ 、V 1+ 、W 1+ Four lines, the star point is U 1- 、V 1- 、W 1- Connect together to form; The tail line of No. 2 is U 2+ 、U 2- 、V 2+ 、V 2- 、W 2+ 、W 2- ; in, U 1+ 、V 1+ 、W 1+ with U 2+ 、V 2+ 、W 2+ A second switch is provided between the two terminals; U 1+ 、V 1+ 、W 1+ with U 2- 、V 2- 、W 2- A first switch is provided between the Star Point and U 2- 、V 2- 、W 2- A third switch is provided between them.

2. The dual-speed fault-tolerant multi-module permanent magnet shaft-locking generator according to claim 1, characterized in that: The first switch, second switch, and third quick-close switch are relays KM1, KM2, and KM3 respectively; KM1, KM2, and KM3 are interlocked; they are electrically connected by K1 to select series and parallel connection; When K1 is connected in series, KM2 and KM3 are in the disconnected state, and KM1 is closed; When K1 is connected in parallel, after KM1 is disconnected, KM2 and KM3 enter the closed state.

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