CN218006136U - System for automatically adjusting output current of synchronous reluctance motor by sensing load change - Google Patents

Abstract

The utility model belongs to the technical field of motor control is used, specifically disclose synchronous reluctance motor response load change automatically regulated output current system, including synchronous reluctance motor, load and electric current automatically regulated output device, synchronous reluctance motor is connected with load, electric current automatically regulated output device respectively, wherein, electric current automatically regulated output device, including frequency sampling module, response module, electric current loop output module, SVPWM control module, synchronous reluctance controller and electric current sampling module. The beneficial effects of the utility model reside in that: 1. the motor has the advantages that the load change is automatically sensed, the current is automatically adjusted, the output current of the motor is extremely low when the motor is in no-load, the current is reasonable when the motor is in light load, the current output is essentially controlled, the electricity is saved, the no-load current is only 1/18 of that of three asynchronous motors, and the idle work is extremely low; 2. the phenomenon that the motor generates heat seriously due to fast load change can be effectively avoided, and the service life of the synchronous reluctance motor is further prolonged.

Description

System for automatically adjusting output current of synchronous reluctance motor by sensing load change

Technical Field

The utility model belongs to the technical field of motor control is used, concretely relates to synchronous reluctance motor response load changes automatically regulated output current system.

Background

The traditional motor current control has several modes and characteristics: the first direct start has large starting current which can reach 4-7 times of rated current, thus causing impact on a power grid and damaging a motor and related equipment to a great extent to different degrees; the second soft start is that a group of high-power bidirectional thyristors are connected in series between the motor and an input power supply, the control circuit adopts electronic intelligent control to change the conduction angle of the thyristors, so that the voltage of the motor is steadily increased, the starting current of the motor is controlled to be 1-2.5 times of the rated current value, and the soft start can be continuously adjusted, thereby reducing the damage of impact current to the motor, power supply equipment or a power grid; the third frequency converter is started, and utilizes the on-off action of power semiconductor device to convert power frequency power supply into motor control (speed regulation) device with another frequency, and is a whole-course control, and utilizes the meter signal to control the motor rotation speed of any time interval, and utilizes the change of frequency of electric network to regulate the motor rotation speed and rotation speed.

Three kinds of starting methods are only starting motor, can't the intelligent recognition motor load change adjusts output current, still have some many problems to the control mode of motor.

The disadvantages of the three above-mentioned start-up modes are represented by: 1, the direct start is realized, the start current is large, the impact on a motor, other equipment and a power grid can be caused, and the control mode is simple; 2. the soft-started silicon controlled rectifier runs online for a long time to cause unnecessary energy waste, and simultaneously brings higher harmonic pollution to a power grid, the heat dissipation capacity of the silicon controlled rectifier is too large, external machinery is required to help air cooling equipment to improve difficulty, the long-term working reliability of the silicon controlled rectifier as a switching element is far lower than that of a mechanical switch, the silicon controlled rectifier is expensive to make, the economic consumption of a user is improved, the silicon controlled rectifier is large in type selection, and the heat dissipation whole volume is too large; 3. the frequency converter starts, and the frequency converter starter motor on the market, the price is more expensive, often needs to change components and parts, directly increases the maintenance cost.

Therefore, based on the above problem, the utility model provides a synchronous reluctance motor response load changes automatically regulated output current system.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a synchronous reluctance motor response load changes automatically regulated output current system, solves the technical problem that exists among the background art, if solve motor starting current big, unable intelligent control motor output current scheduling problem.

The technical scheme is as follows: the utility model discloses a first aspect provides synchronous reluctance motor response load change automatically regulated output current system, including synchronous reluctance motor, load and electric current automatically regulated output device, synchronous reluctance motor is connected with load, electric current automatically regulated output device respectively, wherein, electric current automatically regulated output device, including frequency sampling module, induction module, current loop output module, SVPWM control module, synchronous reluctance controller and current sampling module, synchronous reluctance motor, frequency sampling module, induction module, current loop output module, SVPWM control module, synchronous reluctance controller connect gradually, and synchronous reluctance motor is connected with synchronous reluctance controller, current sampling module respectively, and current sampling module is connected with induction module.

According to the technical scheme, the frequency sampling modules comprise, but are not limited to ZH-4131A and DAM395CF, the sensing modules comprise, but are not limited to, 6ES7338-4BC01-0AB0, the current loop output modules comprise, but are not limited to, 41-765 and SAX0800-FX3-S, the SVPWM control modules comprise, but are not limited to, FT1215 and FU6811, the synchronous reluctance controllers comprise, but are not limited to, MK300N, CTKT-90/B and CTKT-90/M, and the current sampling modules comprise, but are not limited to, C-4017+ and DAM-397C.

Compared with the prior art, the utility model discloses a synchronous reluctance motor response load changes automatically regulated output current system's beneficial effect lies in: 1. the motor has the advantages that the motor can automatically sense the load change and automatically adjust the current, the output current of the motor is extremely low when the motor is in a no-load state, the current is reasonable when the motor is in a light load state, the current output is essentially controlled, the electricity is saved, the no-load current is only 1/18 of that of three asynchronous motors, and the idle work is extremely low; 2. the intelligent current output regulation system has the advantages that the intelligent current output regulation system for the synchronous reluctance motor is reasonable in design, can effectively avoid the phenomenon that the motor generates heat seriously due to the fact that the load changes quickly, and further prolongs the service life of the synchronous reluctance motor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following embodiments will be made to

While the drawings needed to describe the embodiments herein are briefly described, it should be apparent that the drawings described below are merely examples of the invention, and that other drawings may be derived from those of ordinary skill in the art without inventive faculty.

Fig. 1 is a schematic structural diagram of a synchronous reluctance motor output current system for automatically adjusting the induced load variation according to the present invention;

fig. 2 is an electrical schematic diagram of the SVPWM control module of the synchronous reluctance motor induction load change automatic regulation output current system of the present invention;

fig. 3 is an electrical schematic diagram of the sensing module of the synchronous reluctance motor system for automatically adjusting the output current according to the present invention;

fig. 4 is an electrical schematic diagram of a current loop output module of the synchronous reluctance machine induction load change automatic regulation output current system of the present invention;

fig. 5 is an electrical schematic diagram of a current sampling module of the synchronous reluctance motor induction load change automatic regulation output current system of the present invention;

fig. 6 is an electrical schematic diagram of a frequency sampling module of the synchronous reluctance motor induction load change automatic regulation output current system of the present invention;

wherein, the sequence numbers in the figure are as follows: 100-synchronous reluctance motor, 101-frequency sampling module, 102-induction module, 103-current loop output module, 104-SVPWM control module, 105-synchronous reluctance controller, 106-current sampling module and 107-load.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be noted that the terms "top", "bottom" and "side"

"the other side", "the front", "the back", "the middle part", "the inside", "the top",

bottom "and the like are orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The synchronous reluctance motor sensing load change automatic adjustment output current system as shown in fig. 1, 2, 3, 4, 5 and 6, includes a synchronous reluctance motor 100, a load 107 and a current automatic adjustment output device,

the synchronous reluctance motor 100 is respectively connected with a load 107 and an automatic current regulation output device, wherein the automatic current regulation output device comprises a frequency sampling module 101, an induction module 102, a current loop output module 103, an SVPWM control module 104, a synchronous reluctance controller 105 and a current sampling module 106,

the synchronous reluctance motor 100, the frequency sampling module 101, the induction module 102, the current loop output module 103, the SVPWM control module 104 and the synchronous reluctance controller 105 are connected in sequence,

the synchronous reluctance motor 100 is respectively connected with a synchronous reluctance controller 105 and a current sampling module 106,

the current sampling module 106 is connected to the sensing module 102.

Preferably, the frequency sampling module 101 comprises but is not limited to ZH-4131A and DAM395CF, the sensing module 102 comprises but is not limited to 6ES7338-4BC01-0AB0, the current loop output module 103 comprises but is not limited to 41-765 and SAX0800-FX3-S, the SVPWM control module 104 comprises but is not limited to FT1215 and FU6811, the synchronous reluctance controller 105 comprises but is not limited to MK300N, CTKT-90/B and CTKT-90/M, and the current sampling module 106 comprises but is not limited to C-4017+ and DAM-397C.

The synchronous reluctance motor of this structure responds to the operating principle or the structural principle that load change automatically regulated output current system:

1. starting a synchronous reluctance controller 105, and enabling the synchronous reluctance motor 100 to rotate through the synchronous reluctance controller 105;

2. the rotating synchronous reluctance motor 100 drives a load 107, and when the synchronous reluctance motor 100 drives the load 107, the frequency sampling module 101 and the current sampling module 106 sample the synchronous reluctance motor 100 and transmit sampling parameter data to the induction module 102;

3. the induction module 102 transmits the sampling parameter data to the current loop output module 103;

4. the SVPWM control module 104 receives sampling parameter data fed back by the current loop output module 103;

5. the synchronous reluctance controller 105 receives the sampling parameter data transmitted by the SVPWM control module 104, and automatically adjusts the output current of the motor (intelligently and automatically adjusted by the change of the load) according to the received sampling parameter data in real time by using the preset parameter data of the synchronous reluctance controller 105, thereby achieving reasonable current output.

The high-efficiency area of the synchronous reluctance motor is a 'wide area' rather than a 'rated point', and the advantages of the synchronous reluctance motor after the output current system is automatically adjusted by combining the induction load change of the synchronous reluctance motor are as follows: the energy efficiency level reaches the highest global level IE5, the high-efficiency area of the traditional three-phase asynchronous motor is 80-100%, the middle-efficiency area is 45-80%, the low-efficiency area is below 45%, the lowest efficiency of the low-efficiency area during operation is 23%, the high-efficiency area of the synchronous reluctance motor is 20-100%, the lowest efficiency of the synchronous reluctance motor is 80%, and the power saving rate of the synchronous reluctance motor during operation is as high as 20-60%.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims (2)

1. Synchronous reluctance motor response load change automatically regulated output current system, including synchronous reluctance motor (100), load (107) and electric current automatically regulated output device, its characterized in that: synchronous reluctance machine (100) are connected with load (107), electric current automatically regulated output device respectively, wherein, electric current automatically regulated output device, including frequency sampling module (101), response module (102), electric current loop output module (103), SVPWM control module (104), synchronous reluctance controller (105) and electric current sampling module (106), synchronous reluctance machine (100), frequency sampling module (101), response module (102), electric current loop output module (103), SVPWM control module (104), synchronous reluctance controller (105) connect gradually, synchronous reluctance machine (100) are connected with synchronous reluctance controller (105), electric current sampling module (106) respectively, electric current sampling module (106) are connected with response module (102).

2. The synchronous reluctance machine induction load change automatic regulation output current system of claim 1, wherein: the frequency sampling module (101) comprises ZH-4131A and DAM395CF, the sensing module (102) comprises 6ES7338-4BC01-0AB0, the current loop output module (103) comprises 41-765 and SAX0800-FX3-S, the SVPWM control module (104) comprises 1215 and FU6811, the synchronous reluctance controller (105) comprises MK300N, CTKT-90/B and CTKT-90/M, and the current sampling module (106) comprises C-4017+ and DAM-397C.

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