Permanent magnet generator sensing module for emergency power supply vehicle

Abstract

The utility model provides a permanent magnet generator sensing module for an emergency power supply vehicle, and belongs to the technical field of emergency power generation. A permanent magnet generator sensing module for an emergency power supply vehicle is characterized in that a stator is fixedly provided with a winding groove, a stator winding is divided into three phases to be wound in the winding groove on the stator, and the angle between every two phases of stator windings is 120 degrees; a rotor iron core, a permanent magnet and a rotor sheath are sequentially sleeved on the rotating shaft in the stator winding; a diagnosis winding is wound on the stator; the diagnosis winding is electrically connected with a single-chip microcomputer processing module. According to the utility model, real-time non-stop sensing of data of the generator can be realized under the condition of emergency power supply, so that the generator can find faults as early as possible under the emergency condition, data support is provided for further analysis of specific conditions of turn-to-turn short circuit faults, and emergency diagnosis of the permanent magnet generator with turn-to-turn short circuit can be realized; therefore, uninterrupted power supply in emergency places is realized, voltage impact on electric appliances is reduced, and power supply stability is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of emergency power generation, specifically relates to a permanent magnet generator sensing module for emergency power supply vehicle. BACKGROUND

[0002] The emergency power supply vehicle is mainly fuel power supply vehicle, that is, the generator set and the power management system are installed on the vehicle. At present, the generator of the emergency power supply vehicle is affected by complex working conditions and harsh working environment such as overload and impact, and the performance of part of structures and components is deteriorated due to uninterrupted operation in emergency, so the inter-turn short circuit fault of the permanent magnet generator occurs from time to time, which influences the normal work of the generator. Therefore, how to realize the sensing of the generator data in real time without shutdown under the condition of emergency power supply so that the inter-turn short circuit fault can be found as early as possible in the emergency situation, thereby more fault maintenance response time can be obtained, is a problem to be solved. SUMMARY

[0003] A permanent magnet generator sensing module for emergency power supply vehicle, comprising a stator winding, a permanent magnet, a rotor sheath, a rotor core, a rotating shaft and a stator, the stator is fixedly provided with a winding slot, the stator winding is divided into three-phase winding slots wound in the stator, and the angle between every two-phase stator windings is 120°. The rotating shaft located in the stator winding is sequentially sleeved with the rotor core, the permanent magnet and the rotor sheath. The stator is wound with a diagnostic winding. The diagnostic winding is electrically connected with a single-chip microcomputer processing module.

[0004] Preferably, the diagnostic winding is divided into two phases, and each turn of the winding coil on each phase of the diagnostic winding is wound on the outside of the stator winding in the same winding slot.

[0005] Preferably, the angle between the two phases of the diagnostic winding is 120°.

[0006] Preferably, each phase of the diagnostic winding occupies three slots of the winding slot.

[0007] Preferably, the diagnostic winding and the stator winding are insulated between layers.

[0008] Further, the single-chip microcomputer processing module is electrically connected with a rotary transformer, and the rotary transformer is sleeved on one end of the rotating shaft.

[0009] Compared with the prior art, the utility model can realize the sensing of the generator data in real time without shutdown under the condition of emergency power supply, so that the fault can be found as early as possible in the emergency situation, data support is provided for further analysis of the specific situation of the inter-turn short circuit fault, emergency diagnosis of the permanent magnet generator with inter-turn short circuit can also be realized, uninterrupted power supply in the emergency place is realized, the voltage impact on the electric appliance is reduced, and the power supply stability is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] The utility model makes further detailed description in combination with the drawings below.

[0011] Figure 1 : the utility model structure explosion schematic view;

[0012] Figure 2 : the utility model cutaway view;

[0013] Figure 3 : the utility model motor stress condition diagram

[0014] Among them, 101 - stator winding, 102 - permanent magnet, 103 - rotor sheath, 104 - rotor core, 105 - rotating shaft, 106 - stator, 107 - winding slot, 2 - diagnostic winding, 3 - rotary transformer. DETAILED DESCRIPTION

[0015] In order to better understand the utility model, the content of the utility model is further clearly set forth below in conjunction with examples, but the protection content of the utility model is not only limited to the following examples.In the following description, a large number of specific details are given in order to provide a more thorough understanding of the utility model.However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details.

[0016] Example 1 refers to Figure 1 And 2

[0017] A kind of emergency power supply vehicle uses permanent magnet generator sensing module, including stator winding 101, permanent magnet 102, rotor sheath 103, rotor core 104, rotating shaft 105 and stator 106, the stator 106 is fixedly provided with winding slot 107, the stator winding 101 is divided into three-phase winding slot 107 in stator, every two phase stator winding 101 angle apart 120 °;Rotating shaft 105 located in the stator winding 101 inside is sequentially sleeved rotor core 104, permanent magnet 102 and rotor sheath 103;The stator 106 is wound and connected with diagnostic winding 2;Diagnostic winding 2 is electrically connected with single-chip microcomputer processing module;Single-chip microcomputer processing module is independently powered;Single-chip microcomputer processing module includes analog-digital signal conversion circuit, digital signal processing circuit, information storage circuit, information processing circuit, filter circuit and amplification circuit.

[0018] Preferably, diagnostic winding 2 is divided into two phases, and each turn of winding coil on each phase of diagnostic winding 2 is wound outside the stator winding in the same winding slot.

[0019] Preferably, the angle of the two phases of diagnostic winding 2 is 120 °.

[0020] Preferably, the diagnostic winding 2 occupies three slots of the winding slot per phase.

[0021] Preferably, the diagnostic winding 2 and the stator winding are insulated.

[0022] After installing the module on the permanent magnet generator, in use, first start the permanent magnet generator to make it run at no load, the diagnostic winding 2 monitors the no-load back electromotive force voltage waveform data inside the permanent magnet generator at this time, then transmits the data to the analog-digital signal conversion circuit of the single-chip microcomputer processing module, converts the no-load back electromotive force voltage waveform signal into a digital signal, and transmits the digital signal to the digital signal processing circuit to obtain the frequency domain signal containing harmonic information through Fourier decomposition, and the frequency domain signal is saved in the information storage circuit as reference data.

[0023] When the permanent magnet generator is working: the diagnostic winding 2 senses the change of the magnetic field of the motor at all times and transmits the back electromotive force voltage waveform data inside the permanent magnet generator to the single-chip microcomputer processing module, then transmits the data to the analog-digital signal conversion circuit of the single-chip microcomputer processing module, converts the no-load back electromotive force voltage waveform signal into a digital signal, and transmits the digital signal to the digital signal processing circuit to obtain the frequency domain signal containing harmonic information through Fourier decomposition, and the information processing circuit analyzes whether there is a difference between the harmonic content of the no-load back electromotive force and the harmonic content when working, thereby judging whether there is a turn-to-turn short circuit fault.

[0024] Embodiment 2, see Figure 1 and 2 Compared with embodiment 1, further, the single-chip microcomputer processing module is electrically connected with a rotary transformer 3, the rotary transformer 3 is sleeved on one end of the rotating shaft 105; the rotary transformer 3 includes a resolver analog-digital conversion circuit.

[0025] When the permanent magnet generator has a turn-to-turn short circuit fault:

[0026] The diagnostic winding 2 senses the change of the magnetic field of the motor at all times and transmits the back electromotive force voltage waveform data inside the permanent magnet generator to the single-chip microcomputer processing module, then transmits the data to the filter circuit and the amplification circuit of the single-chip microcomputer processing module, converts the no-load back electromotive force voltage waveform signal into a high-frequency sine wave, and transmits the high-frequency sine wave as an excitation signal to the stator winding of the rotary transformer 3. The rotor winding of the rotary transformer 3 is sleeved on one end of the rotating shaft 105 and rotates synchronously with the permanent magnet generator, and the rotor winding of the rotary transformer 3 generates a voltage waveform data signal in the current fault state through coupling with the stator winding of the rotary transformer 3. The voltage waveform data signal is transmitted to the resolver analog-digital conversion circuit, and the information containing the angular displacement and angular velocity of the rotor is obtained through processing, thereby providing data support for further auxiliary calculation and analysis of the specific situation of the unbalanced magnetic pull generated by the turn-to-turn short circuit.

[0027] Embodiment 3, see Figure 3 Compared with Embodiment 2, this embodiment can, when the inter-turn short circuit of the permanent magnet generator occurs, correct the unbalanced magnetic pull suffered by the rotor by injecting the current of the corresponding waveform and size which can offset the unbalanced magnetic pull caused by the inter-turn short circuit into the diagnostic winding 2. By analyzing the force condition of the motor Figure 3 It can be seen that, in normal operation, the force of the motor is smooth and without fluctuation, and after the motor fault occurs, the force fluctuation is obvious, the force fluctuation is small by the correction current injection, the force is stable, and finally the emergency operation after the inter-turn short circuit fault of the motor is realized.

[0028] Finally, it is pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit, other modifications or equivalent replacements of the technical solutions of the utility model made by the ordinary skilled in the art should be covered in the claim range of the utility model as long as they do not deviate from the spirit and range of the technical solutions of the utility model.

Claims

1. A sensing module for an emergency power vehicle permanent magnet generator, characterized in that: The system includes a stator winding, a permanent magnet, a rotor sheath, a rotor core, a shaft, and a stator. The stator has winding slots fixedly arranged on it. The stator winding is divided into three phases and wound in the winding slots on the stator, with each pair of stator windings spaced 120° apart. The rotor core, permanent magnet, and rotor sheath are sequentially sleeved on the shaft located inside the stator winding. A diagnostic winding is wound on the stator. The diagnostic winding is electrically connected to a microcontroller processing module.

2. The emergency power vehicle permanent magnet generator sensing module according to claim 1, characterized in that: The diagnostic winding is divided into two phases, and each turn of the winding coil on each phase of the diagnostic winding is wound on the outside of the stator winding located in the same winding slot.

3. The emergency power vehicle permanent magnet generator sensing module according to claim 2, characterized in that: The two phases of the diagnostic winding have an angle difference of 120°.

4. The emergency power vehicle permanent magnet generator sensing module according to claim 3, characterized in that: The diagnostic winding occupies three of the winding slots per phase.

5. The emergency power vehicle permanent magnet generator sensing module according to claim 4, characterized in that: The diagnostic winding and stator winding are subjected to interlayer insulation treatment.

6. The sensing module for an emergency power vehicle permanent magnet generator according to claim 1, characterized in that: The microcontroller processing module is electrically connected to a rotary transformer, which is sleeved on one end of the rotating shaft.

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