Double-permanent-magnet speed regulation all-in-one machine and operation method

Abstract

The invention relates to the technical field of permanent magnet motors, in particular to a double-permanent-magnet speed regulation all-in-one machine and an operation method. A double-permanent-magnet speed regulation all-in-one machine comprises a machine base provided with a containing space; the motor winding stator comprises a secondary winding and a working winding, the secondary winding is suitable for being connected with a four-quadrant frequency converter line, and the working winding is connected with a power grid line through a first phase detection module and a second phase detection module; the permanent magnet planetary rotor set comprises an outer permanent magnet set, a middle connecting sleeve and an inner permanent magnet set which are sequentially arranged in a sleeving mode from outside to inside, the motor winding stator is arranged on the periphery of the outer permanent magnet set in a sleeving mode, and the outer permanent magnet set and the motor winding stator form an outer permanent magnet motor set; the inner winding rotor, the inner permanent magnet group and the inner winding rotor form an inner permanent magnet generator set; and an output shaft. The invention provides a double-permanent-magnet speed regulation all-in-one machine and an operation method, and aims to solve the problem of loss of a transformer due to the fact that a power generator directly uploads energy to a power grid after generating power and then the power grid drives a motor to rotate.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor technology, specifically to a dual permanent magnet speed regulating integrated machine and its operating method. Background Technology

[0002] The main problem with high-voltage asynchronous motors + frequency converters is significant harmonic pollution. For high-power, square-torque loads like fans or pumps, when speed regulation is deep, a line fault prevents switching to the mains frequency, requiring shutdown followed by mains frequency restart. The main problem with high-voltage permanent magnet motors + frequency converters is inability to operate after a frequency converter failure. Self-starting permanent magnet motors are characterized by large starting capacity and significant starting shock. While the combined application of these technologies offers excellent energy-saving effects for fan and pump speed regulation, the aforementioned drawbacks persist. Furthermore, frequency converters, being power electronic devices, are highly sensitive to temperature and humidity conditions.

[0003] Existing generators directly transmit energy to the power grid after generating electricity, and the power grid then drives the motor to rotate, which results in transformer losses. Summary of the Invention

[0004] In view of this, the present invention provides a dual permanent magnet speed regulating integrated machine and its operation method to solve the problem of transformer loss that occurs when the generator directly uploads energy to the power grid after generating electricity, and the power grid drives the motor to rotate.

[0005] In a first aspect, the present invention provides a dual permanent magnet speed-regulating integrated machine, comprising: The base has a receiving space; A motor winding stator is disposed within the accommodating space. The motor winding stator includes an auxiliary winding and a working winding. The auxiliary winding is adapted to be connected to the circuit of a four-quadrant frequency converter. The working winding is connected to the power grid circuit through a first phase detection module and a second phase detection module. A permanent magnet planetary rotor assembly is disposed within the inner cavity of the motor winding stator. The permanent magnet planetary rotor assembly includes an outer permanent magnet assembly, an intermediate connecting sleeve, and an inner permanent magnet assembly arranged sequentially from the outside to the inside. The motor winding stator is sleeved on the outer periphery of the outer permanent magnet assembly. The outer permanent magnet assembly and the motor winding stator form an outer permanent magnet motor assembly. An inner winding rotor is located inside the cavity of the permanent magnet planetary rotor assembly. The inner permanent magnet assembly and the inner winding rotor form an inner permanent magnet generator assembly. The rotational speeds of the permanent magnet planetary rotor assembly and the inner winding rotor are different. The output shaft, wherein the inner winding rotor is sleeved on the outer periphery of the output shaft; A slip ring is sleeved on the output shaft and connected to the inner winding rotor circuit. The inner winding rotor is connected to the four-quadrant frequency converter through the slip ring and a second low-voltage contactor.

[0006] The auxiliary winding of the permanent magnet planetary rotor is started by using a four-quadrant frequency converter, which electromagnetically couples with the outer permanent magnet group of the permanent magnet planetary rotor set to slowly start the permanent magnet planetary rotor set. The inner winding rotor cuts the magnetic lines of force of the inner permanent magnet group to generate an induced electromotive force. At this time, the second low-voltage contactor is open. After the first phase detection module and the second phase detection module detect the phase and amplitude of the working winding with the power grid respectively, the high-voltage contactor is short-circuited, and the working winding is switched to the power frequency, and the permanent magnet planetary rotor set is soft-started. When the second low-voltage contactor is turned on, the internal winding in the inner winding rotor is connected to the four-quadrant frequency converter. The slip energy output by the inner permanent magnet generator set is inverted by the four-quadrant frequency converter and fed back to the auxiliary winding of the outer permanent magnet generator set, which shortens the recovery path and eliminates the loss of the step-up transformer.

[0007] In one optional embodiment, the auxiliary winding and the working winding are respectively fixed in the same slot and phase sequence in the stator slot of the motor winding stator.

[0008] In one optional embodiment, the system further includes a motor starter junction box and a motor junction box, which are located on the outside of the machine base. The motor starter junction box is connected to the auxiliary winding of the motor stator via a line, and the motor junction box is connected to the working winding of the motor stator.

[0009] In one optional embodiment, a feedback junction box is further included, which is located on the outside of the base. A slip ring is fitted around the outer periphery of the end of the output shaft away from the output end, and the slip ring is connected to the feedback junction box.

[0010] In one alternative embodiment, the system further includes a transformer and a first low-voltage contactor, the first low-voltage contactor being connected to the motor starter junction box and the four-quadrant frequency converter circuit, the transformer being connected to the four-quadrant frequency converter and the power grid circuit, and the second low-voltage contactor being connected to the four-quadrant frequency converter and the feedback junction box circuit.

[0011] In an optional embodiment, a high-voltage contactor is also included, wherein the first phase detection module is connected to the motor junction box and the high-voltage contactor line respectively, and the second phase detection module is connected to the high-voltage contactor and the power grid line respectively.

[0012] In one optional embodiment, the output end of the output shaft extends outside the base, a first support bearing is provided between the intermediate connecting sleeve and the support portion of the base, and a second support bearing is provided between the output shaft and the support portion.

[0013] Secondly, the present invention also provides a method for operating the dual permanent magnet speed-regulating integrated machine as described above, comprising the following steps: The auxiliary winding of the four-quadrant frequency converter is started by frequency conversion and electromagnetically coupled with the outer permanent magnet group of the permanent magnet planetary rotor group to slowly start the permanent magnet planetary rotor group. The inner winding rotor cuts the magnetic lines of force of the inner permanent magnet group to generate an induced electromotive force. At this time, the second low-voltage contactor is open. After the phase and amplitude of the working winding and the power grid are detected by the first phase detection module and the second phase detection module respectively, the high-voltage contactor is short-circuited, the working winding is switched to the power frequency, and the permanent magnet planetary rotor group is soft-started. When the second low-voltage contactor is turned on, the internal winding in the inner winding rotor is connected to the four-quadrant frequency converter. The slip energy output by the inner permanent magnet generator set is inverted by the four-quadrant frequency converter and fed back to the auxiliary winding of the outer permanent magnet generator set.

[0014] In one alternative implementation, the method further includes: the power grid is reduced to the same low voltage as the four-quadrant frequency converter and the secondary winding by a transformer before the secondary winding is started.

[0015] In one alternative implementation, the high-voltage contactor is switched on when the phase and amplitude of the working winding and the power grid are the same. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a dual permanent magnet speed-regulating integrated machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the dual permanent magnet speed regulating integrated machine in the starting state according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the dual permanent magnet speed regulating integrated machine in the switching power frequency state according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the dual permanent magnet speed regulating integrated machine in the speed regulating operation state according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the motor winding stator according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Dual permanent magnet speed regulating integrated machine; 101. Machine base; 1011. Accommodation space; 1012. Second accommodation space; 1013. Support part; 102. Motor winding stator; 1021. Auxiliary winding; 1022. Working winding; 1023. Stator slot; 103. Permanent magnet planetary rotor assembly; 1031. Outer permanent magnet assembly; 1032. Inner permanent magnet assembly; 1033. Intermediate connecting sleeve; 104. Inner winding rotor; 1041. Internal winding Group; 105, Output shaft; 1051, Output terminal; 106, Motor starter junction box; 107, Motor junction box; 108, Feedback junction box; 109, Brush; 110, Slip ring; 112, First support bearing; 113, Second support bearing; 2, Four-quadrant frequency converter; 3, First low-voltage contactor; 4, High-voltage contactor; 5, First phase detection module; 6, Second low-voltage contactor; 7, Transformer; 8, Second phase detection module; 9, Power grid. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0021] According to an embodiment of the present invention, a dual permanent magnet speed regulating integrated machine 1 is provided, comprising: a base 101 having a receiving space 1011; a motor winding stator 102 disposed within the receiving space 1011, the motor winding stator 102 including a secondary winding 1021 and a working winding 1022, the secondary winding 1021 being adapted to be connected to a four-quadrant frequency converter 2, and the working winding 1022 being connected to a power grid 9 via a first phase detection module 5 and a second phase detection module 8; and a permanent magnet planetary rotor assembly 103 disposed within the inner cavity of the motor winding stator 102, the permanent magnet planetary rotor assembly 103 including an outer permanent magnet assembly 1031, an intermediate connecting sleeve 1033, and an inner permanent magnet assembly arranged sequentially from the outside to the inside. 1032, the motor winding stator 102 is sleeved on the outer periphery of the outer permanent magnet assembly 1031, and the outer permanent magnet assembly 1031 and the generator winding rotor form an outer permanent magnet motor assembly; the inner winding rotor 104 is located in the inner cavity of the permanent magnet planetary rotor assembly 103, and the inner permanent magnet assembly 1032 and the inner winding rotor 104 form an inner permanent magnet generator assembly, and the permanent magnet planetary rotor assembly 103 and the inner winding rotor 104 have different rotational speeds; output shaft 105, the inner winding rotor 104 is sleeved on the outer periphery of the output shaft 105; slip ring 110 is sleeved on the output shaft 105, the slip ring 110 is connected to the auxiliary winding 1021 by wiring, and the inner winding rotor 104 is connected to the four-quadrant frequency converter 2 through the slip ring 110 and the second low-voltage contactor 6.

[0022] The auxiliary winding 1021 of the four-quadrant frequency converter 2 is started by frequency conversion and electromagnetically coupled with the outer permanent magnet group 1031 of the permanent magnet planetary rotor group 103 to slowly start the permanent magnet planetary rotor group 103. The inner winding rotor 104 cuts the magnetic lines of force of the inner permanent magnet group 1032 to generate an induced electromotive force. At this time, the second low-voltage contactor 6 is open. After the phase and amplitude phase lock of the working winding 1022 with the power grid 9 are detected by the first phase detection module 5 and the second phase detection module 8 respectively, the high-voltage contactor 4 is short-circuited, and the working winding 1022 is switched to the power frequency, and the permanent magnet planetary rotor group 103 is soft-started. When the second low-voltage contactor 6 is turned on, the inner winding 1041 in the inner winding rotor 104 is connected to the four-quadrant frequency converter 2. The slip energy output by the inner permanent magnet generator set is inverted by the four-quadrant frequency converter 2 and fed back to the auxiliary winding 1021 of the outer permanent magnet generator set, which shortens the recovery path and eliminates the loss of the step-up transformer 7.

[0023] When the motor winding stator 102 is powered by the industrial frequency, the permanent magnet planetary rotor 103 starts under no-load. The outer permanent magnet group 1031 and the inner permanent magnet group 1032 rotate at synchronous speed. The inner winding rotor 104 cuts the magnetic lines of force of the inner permanent magnet group 1032 to generate an induced electromotive force. The inner winding rotor 104 is connected. The slip energy output by the permanent magnet generator is inverted by the four-quadrant frequency converter 2 and directly fed back to the motor winding stator 102 of the same voltage level, which shortens the recovery path and eliminates the loss of the step-up transformer 7.

[0024] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the intermediate connecting sleeve 1033 is fixedly connected to the outer permanent magnet group 1031 and the inner permanent magnet group 1032 respectively. The intermediate connecting sleeve 1033 connects the outer permanent magnet group 1031 and the inner permanent magnet group 1032 respectively, so that the rotation speed of the outer permanent magnet group 1031 and the inner permanent magnet group 1032 is the same.

[0025] In this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the central axes of the motor winding stator 102, permanent magnet planetary rotor assembly 103, inner winding rotor 104, and output shaft 105 are the same. The inner winding rotor 104 is provided with several internal windings 1041, which are connected to the slip ring 110 circuit.

[0026] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the auxiliary winding 1021 and the working winding 1022 are fixedly disposed in the same slot and phase sequence in the stator slot 1023 of the motor winding stator 102, so that the auxiliary winding 1021 and the working winding 1022 remain stationary. It should be noted that the motor winding stator 102 has a number of open stator slots 1023 evenly arranged in the circumferential direction. Each stator slot 1023 is respectively provided with the working winding 1022 and the auxiliary winding 1021, and the distance between the working winding 1022 and the opening is smaller than the distance between the auxiliary winding 1021 and the opening.

[0027] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it also includes a motor starter junction box 106 and a motor junction box 107, which are located on the outside of the frame 101. The motor starter junction box 106 is connected to the auxiliary winding 1021 of the motor stator 102 via a circuit, and the motor junction box 107 is connected to the working winding 1022 of the motor stator 102. The connection between the motor starter junction box 106 and the auxiliary winding 1021 of the motor stator 102 enables the starting of the external permanent magnet assembly 1031. The auxiliary winding 1021 generates a magnetic field through current, which works in conjunction with the working winding 1022 to achieve electromechanical energy conversion, enabling the external permanent magnet motor assembly to perform a soft start. The motor junction box 107 is connected to the working winding 1022 of the motor stator 102, and the working winding 1022 receives high-voltage electrical energy.

[0028] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it also includes a feedback junction box 108, which is located on the outside of the base 101. A slip ring 110 is sleeved on the outer periphery of the end of the output shaft 105 away from the output end 1051. The feedback junction box 108 is connected to the slip ring 110 through a line.

[0029] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it also includes a transformer 7 and a first low-voltage contactor 3. The first low-voltage contactor 3 is connected to the motor starting junction box 106 and the four-quadrant frequency converter 2. The transformer 7 is connected to the four-quadrant frequency converter 2 and the power grid 9. The second low-voltage contactor 6 is connected to the four-quadrant frequency converter 2 and the feedback junction box 108. By controlling the voltage and current of the inner winding using the four-quadrant frequency converter 2, the speed and torque of the inner winding rotor 104 with windings can be controlled, thereby controlling the speed and torque of the output shaft 105.

[0030] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it also includes a high-voltage contactor 4, a first phase detection module 5 connected to the motor junction box 107 and the high-voltage contactor 4 respectively, and a second phase detection module 8 connected to the high-voltage contactor 4 and the power grid 9 respectively.

[0031] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the output end 1051 of the output shaft 105 extends out of the base 101. A first support bearing 112 is provided between the intermediate connecting sleeve 1033 and the support portion 1013 of the base 101, and a second support bearing 113 is provided between the output shaft 105 and the support portion 1013. The first support bearing 112 enables the intermediate connecting sleeve 1033 to rotate relative to the base 101, and the second support bearing 113 enables the output shaft 105 to rotate relative to the base 101.

[0032] In this embodiment, as Figure 1The system also includes brushes 109, which are located on the outer periphery of the slip ring 110. Brushes 109 are fixed, while the slip ring 110 rotates with the output shaft 105. The feedback junction box 108 is connected to the brushes 109 via wiring. When the output shaft 105 rotates, magnetic lines of force cut the slip ring 110, generating an induced electromotive force, which is then conducted into the external circuit through the brushes 109. The contact area between the brushes 109 and the slip ring 110 must account for more than 75% of the cross-section of a single brush 109. Brushes 109 must be replaced when they wear down to 2 / 3 of their original length.

[0033] A method for operating a dual permanent magnet speed-regulating integrated machine, comprising a start-up state, a power frequency switching state, and a speed-regulating operation state, including the following steps: (1) When in the starting state, the power grid 9 reduces the 10kV / 6kV voltage to the same low voltage (380V / 690V / 1140V) as the four-quadrant frequency converter 2 and the auxiliary winding 1021 through the transformer 7. The auxiliary winding 1021 is started by frequency conversion of the four-quadrant frequency converter 2 and electromagnetically coupled with the outer permanent magnet group 1031 of the permanent magnet planetary rotor group 103 to start the permanent magnet planetary rotor group 103 slowly. At this time, the inner winding rotor 104 does not rotate because it is connected to the load. There is a full speed slip between the inner winding rotor 104 and the inner permanent magnet group 1032. The inner winding rotor 104 cuts the magnetic lines of the inner permanent magnet group 1032 to generate an induced electromotive force. At this time, the second low-voltage contactor 6 is open. (2) When in the switching power frequency state, since the auxiliary winding 1021 has brought the permanent magnet planetary rotor 103 into full speed under no-load through the frequency converter, the phase and amplitude of the no-load back EMF of the working winding 1022 of the motor winding stator 102 and the phase and amplitude of the voltage of the power grid 9 are detected by the first phase detection module 5 and the second phase detection module 8 respectively. Under the same phase sequence and the same amplitude, the high voltage contactor 4 is connected, and the working winding 1022 is switched into the power frequency. The soft start of the permanent magnet planetary rotor 103 is achieved under the joint action of the auxiliary winding 1021 and the four-quadrant frequency converter 2 in the forward drive. The working winding 1022 is switched into the power frequency, the start is completed, and the auxiliary winding 1021 and the four-quadrant frequency converter 2 are inverted. (3) When in the speed regulation operation state, the second low-voltage contactor 6 is connected, the internal winding 1041 in the inner winding rotor 104 is connected to the four-quadrant frequency converter 2, and the inverter function of the four-quadrant frequency converter 2 is used to control the slip power in the permanent magnet generator for inverter speed regulation, and the slip power is fed back to the secondary winding 1021 of the same voltage level.

[0034] The dual permanent magnet speed regulating integrated machine provided by the present invention has the following advantages: (1) When the motor winding stator 102 is connected to the power frequency power supply, the permanent magnet planetary rotor group 103 starts under no-load, the outer permanent magnet group 1031 and the inner permanent magnet group 1032 maintain synchronous speed rotation, the inner winding rotor 104 cuts the magnetic lines of the inner permanent magnet group 1032 to generate induced electromotive force, and connects the inner winding rotor 104. The slip energy output by the permanent magnet generator is inverted by the four-quadrant frequency converter 2 and directly fed back to the motor winding stator 102 of the same voltage level, shortening the recovery path and eliminating the loss of the step-up transformer 7; (2) By integrating the four-quadrant frequency converter 2, the first phase detection module 5 and the second phase detection module 8, the closed-loop feedback of slip energy is realized; (3) By controlling the internal rotor on and off of the inner winding rotor 104, the magnitude of the induced current and voltage in the inner winding is controlled, and then the speed and torque of the output shaft 105 are controlled; (4) Direct power supply at the power frequency reduces the efficiency reduction of the motor caused by harmonic pollution of the frequency converter.

[0035] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A dual permanent magnet speed-regulating integrated machine, characterized in that, include: A base (101) having a receiving space (1011); The motor winding stator (102) is located in the accommodating space (1011). The motor winding stator (102) includes a secondary winding (1021) and a working winding (1022). The secondary winding (1021) is adapted to be connected to the circuit of the four-quadrant frequency converter (2). The working winding (1022) is connected to the power grid (9) circuit through the first phase detection module (5) and the second phase detection module (8). A permanent magnet planetary rotor assembly (103) is disposed inside the cavity of the motor winding stator (102). The permanent magnet planetary rotor assembly (103) includes an outer permanent magnet assembly (1031), an intermediate connecting sleeve (1033), and an inner permanent magnet assembly (1032) arranged sequentially from the outside to the inside. The motor winding stator (102) is sleeved on the outer periphery of the outer permanent magnet assembly (1031). The outer permanent magnet assembly (1031) and the motor winding stator (102) form an outer permanent magnet motor assembly. An inner winding rotor (104) is disposed in the inner cavity of the permanent magnet planetary rotor assembly (103). The inner permanent magnet assembly (1032) and the inner winding rotor (104) form an inner permanent magnet generator assembly. The rotational speeds of the permanent magnet planetary rotor assembly (103) and the inner winding rotor (104) are different. Output shaft (105), the inner winding rotor (104) is sleeved on the outer periphery of the output shaft (105); A slip ring (110) is sleeved on the output shaft (105). The slip ring (110) is connected to the inner winding rotor (104) by line. The inner winding rotor (104) is connected to the four-quadrant frequency converter (2) through the slip ring (110) and the second low-voltage contactor (6).

2. The dual permanent magnet speed-regulating integrated machine according to claim 1, characterized in that, The auxiliary winding (1021) and the working winding (1022) are respectively fixed in the same slot and phase sequence in the stator slot (1023) of the motor winding stator (102).

3. The dual permanent magnet speed-regulating integrated machine (1) according to claim 1, characterized in that, It also includes a motor starter junction box (106) and a motor junction box (107), which are located on the outside of the frame (101). The motor starter junction box (106) is connected to the auxiliary winding (1021) of the motor winding stator (102) via a line, and the motor junction box (107) is connected to the working winding (1022) of the motor winding stator (102).

4. The dual permanent magnet speed-regulating integrated machine according to claim 3, characterized in that, It also includes a feedback junction box (108), which is located on the outside of the base (101). A collector ring (110) is sleeved on the outer periphery of the end of the output shaft (105) away from the output end (1051), and the collector ring (110) is connected to the feedback junction box (108).

5. The dual permanent magnet speed-regulating integrated machine according to claim 4, characterized in that, It also includes a transformer (7) and a first low-voltage contactor (3), the first low-voltage contactor (3) being connected to the motor starting junction box (106) and the four-quadrant frequency converter (2) respectively, the transformer (7) being connected to the four-quadrant frequency converter (2) and the power grid (9) respectively, and the second low-voltage contactor (6) being connected to the four-quadrant frequency converter (2) and the feedback junction box (108) respectively.

6. The dual permanent magnet speed-regulating integrated machine according to claim 4, characterized in that, It also includes a high-voltage contactor (4), the first phase detection module (5) is connected to the motor junction box (107) and the high-voltage contactor (4) respectively, and the second phase detection module (8) is connected to the high-voltage contactor (4) and the power grid (9) respectively.

7. The dual permanent magnet speed-regulating integrated machine according to any one of claims 1 to 6, characterized in that, The output end (1051) of the output shaft (105) extends out of the base (101). A first support bearing (112) is provided between the intermediate connecting sleeve (1033) and the support part (1013) of the base (101), and a second support bearing (113) is provided between the output shaft (105) and the support part (1013).

8. A method for operating a dual permanent magnet speed-regulating integrated machine as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Using the four-quadrant frequency converter (2) to start the auxiliary winding (1021) electromagnetically coupled with the outer permanent magnet group (1031) of the permanent magnet planetary rotor group (103), the permanent magnet planetary rotor group (103) is started slowly. The inner winding rotor (104) cuts the magnetic lines of force of the inner permanent magnet group (1032) to generate an induced electromotive force. At this time, the second low-voltage contactor (6) is open. After the first phase detection module (5) and the second phase detection module (8) respectively detect the phase and amplitude of the working winding (1022) and the power grid (9), the high voltage contactor (4) is short-circuited, the working winding (1022) is switched to the power frequency, and the permanent magnet planetary rotor group (103) is soft-started. When the second low-voltage contactor (6) is turned on, the internal winding (1041) in the inner winding rotor (104) is connected to the four-quadrant frequency converter (2). The slip energy output by the inner permanent magnet generator set is inverted by the four-quadrant frequency converter (2) and fed back to the auxiliary winding (1021) of the outer permanent magnet generator set.

9. The operating method of the dual permanent magnet speed regulating integrated machine according to claim 8, characterized in that, Also includes: After the power grid (9) is reduced to the same low voltage as the four-quadrant frequency converter (2) and the secondary winding (1021) through the transformer (7), the secondary winding (1021) is started.

10. The operating method of the dual permanent magnet speed regulating integrated machine according to claim 8, characterized in that, When the phase and amplitude of the working winding (1022) and the power grid (9) are the same, the high-voltage contactor (4) is turned on.

Images