CN112422020A - Motor energy-saving technology - Google Patents
Motor energy-saving technology Download PDFInfo
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- CN112422020A CN112422020A CN202011359321.2A CN202011359321A CN112422020A CN 112422020 A CN112422020 A CN 112422020A CN 202011359321 A CN202011359321 A CN 202011359321A CN 112422020 A CN112422020 A CN 112422020A
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- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 238000005265 energy consumption Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 11
- 230000004907 flux Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000009776 industrial production Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/28—Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a motor energy-saving technology, and relates to the technical field of energy conservation. The invention comprises that the efficiency of the motor is the ratio of the effective output power to the input power, the effective output power is the difference between the input power and the self power consumption of the motor, and the purpose of improving the efficiency of the motor can be achieved by effectively reducing the self power consumption. The invention solves the problems that the prior motor can not save energy well and has serious resource waste through the loss and the efficiency of the motor, effectively reduces the self power consumption and can achieve the aim of improving the efficiency of the motor, and the motor energy-saving technology well solves the problem that the prior device can not improve the efficiency of the energy-saving motor well through the selection of the high-efficiency motor, so that the loss is reduced by 20 to 30 percent, and the efficiency is improved by 2 to 7 percent.
Description
Technical Field
The invention belongs to the technical field of energy conservation, and particularly relates to a motor energy conservation technology.
Background
The technology of motor energy saving and the theory of operation that the energy saving reformed transform traditional motor are comparatively complicated, work efficiency is lower, can lead to the waste of a large amount of electric power energy, to this, china begins to strengthen the research and development to novel motor, it is rotor asynchronous motor to be the most successful, this type of motor has thoroughly changed the drawback that traditional motor exists, the operating efficiency is higher, the energy saving, the start-up speed is very fast, current motor can't be fine practice thrift the energy make, the wasting of resources is serious, and the efficiency improvement of energy-saving motor is carried out to the unable fine realization of current device.
Disclosure of Invention
The invention aims to provide a motor energy-saving technology, which solves the existing problems: the existing motor can not well save energy, so that the resource waste is serious, and the efficiency of the existing device can not well improve the energy-saving motor.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a motor energy-saving technology which comprises the steps of adjusting the rotating speed of an asynchronous motor to be a set rotating speed, the loss and the efficiency of a motor, selecting a high-efficiency motor and achieving the energy-saving effect of the high-efficiency motor.
Further, the adjusting the rotating speed of the asynchronous motor to the set rotating speed comprises.
(1) And detecting whether the rotating speed change value of the asynchronous motor is greater than a preset value or not by the real-time angular speed, and adjusting the output voltage of the asynchronous motor driver if the rotating speed change value of the asynchronous motor is greater than the preset value.
(2) If the rotation speed change value of the asynchronous motor is not larger than the preset value, adjusting the output frequency of the asynchronous motor driver, and calculating the output frequency of the asynchronous motor driver according to a PI algorithm, wherein the output frequency is equal to the product of the ratio of the set rotation speed to the actual rotation speed and the previous output frequency; the input value of the PI algorithm is a set value of the angular speed, and the feedback value of the PI algorithm is the real-time angular speed of the asynchronous motor.
(3) And adjusting the SVPWM output waveform according to the output voltage or the output frequency, controlling a three-phase bridge to drive the asynchronous motor, and operating at the minimum power at the set rotating speed.
Further, the losses and efficiencies of the motor include.
(1) When the motor converts electric energy into mechanical energy, a part of energy is consumed by the motor, the loss can be generally divided into winding loss, iron core loss, wind friction loss and load stray loss, the efficiency of the motor is the ratio of effective output power to input power, the effective output power is the difference between the input power and the power consumption of the motor, and the purpose of improving the efficiency of the motor can be achieved by effectively reducing the power consumption of the motor.
(2) The frequency of a working power supply of the motor is changed, the novel energy-saving technology is mainly used for correspondingly adjusting the working requirement of the motor, so that the energy efficiency of the motor reaches the optimal state, and the technology is widely applied to industrial production.
(3) The Y-type motor in a rotating state can absorb a large amount of useless energy, so that more extra loss of electric energy is caused, and the operation efficiency of the system is reduced.
(4) If the three-phase potential difference exists in the motor, the direction of a rotor in the motor is changed, the direction is opposite to the moving direction of a magnetic field, and the moving force of the rotor is influenced. The energy efficiency is generated on a motor bearing, the rotor absorbs the energy and is consumed as useless energy in the motor, so that the mechanical energy consumption of the motor is reduced, the direction of the rotor is opposite to that of a magnetic field during rotation, a large amount of extra energy is consumed in the process, the energy consumption of the motor is increased, the temperature of the motor is overhigh due to heat energy conversion, the three-phase potential difference in the motor is unified through the function of a circuit system, and the large motor energy consumption caused by the influence of the factor is reduced.
Further, the selection of the high-efficiency motor comprises.
(1) High-efficiency motors YX and other series generally refer to high-efficiency three-phase asynchronous motors, and the efficiency level can reach or exceed the energy-saving motor specified by the national standard of motor energy efficiency.
(2) The magnetic slot wedge is adopted to replace the original slot wedge, the magnetic slot wedge mainly reduces the no-load iron loss in the asynchronous motor, the no-load additional iron loss is generated in a stator core and a rotor core by harmonic magnetic flux caused by a cogging effect, the high-frequency additional iron loss induced by the stator core and the rotor core is called pulse oscillation loss, in addition, tooth parts of the stator and the rotor are regularly aligned and regularly staggered, the tooth surface cluster magnetic flux is changed, eddy current can be induced on a tooth surface wire layer to generate surface loss, the pulse oscillation loss and the surface loss are jointly called the high-frequency additional loss, the high-frequency additional iron loss accounts for 70% -90% of stray loss of the motor, and the other 10% -30% of loss is called load additional loss and is generated by magnetic leakage flux. Although the use of the magnetic slot wedge can reduce the starting torque by 10-20%, the iron loss of the motor adopting the magnetic slot wedge can be reduced by 60k compared with the motor adopting the common slot wedge, and the magnetic slot wedge is very suitable for the transformation of the motor with no-load or light-load starting.
Further, the energy-saving effect of the high-efficiency motor comprises.
(1) Compared with the common motor, the high-efficiency motor optimizes the overall design, selects high-quality copper windings and silicon steel sheets, reduces various losses, reduces the loss by 20-30 percent, and improves the efficiency by 2-7 percent.
(2) Compared with the common motor, the high-efficiency motor adopts high-quality materials and is optimally designed, so that the energy consumption is reduced by about 20% on average, and the super-high-efficiency motor consumes more than 30% less electric energy than the common motor.
The invention has the following beneficial effects:
1. the motor energy-saving technology well solves the problem that the existing motor can not well save energy, so that the resource waste is serious, and the purpose of improving the efficiency of the motor can be achieved by effectively reducing the self power consumption through the loss and the efficiency of the motor.
2. The motor energy-saving technology well solves the problem that the existing device cannot well improve the efficiency of the energy-saving motor by selecting the high-efficiency motor, so that the loss is reduced by 20-30 percent, and the efficiency is improved by 2-7 percent.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a motor energy-saving technology which comprises the steps of adjusting the rotating speed of an asynchronous motor to be a set rotating speed, the loss and the efficiency of a motor, selecting a high-efficiency motor and achieving the energy-saving effect of the high-efficiency motor.
Adjusting the rotating speed of the asynchronous motor to a set rotating speed;
(1) and detecting whether the rotating speed change value of the asynchronous motor is greater than a preset value or not by the real-time angular speed, and adjusting the output voltage of the asynchronous motor driver if the rotating speed change value of the asynchronous motor is greater than the preset value.
(2) If the detected rotating speed variation value of the asynchronous motor is not larger than the preset value, adjusting the output frequency of the asynchronous motor driver, wherein the output frequency comprises the following steps: calculating the output frequency of the asynchronous motor driver according to a PI algorithm, wherein the output frequency is equal to the product of the ratio of the set rotating speed to the actual rotating speed and the previous output frequency; the input value of the PI algorithm is a set value of the angular speed, and the feedback value of the PI algorithm is the real-time angular speed of the asynchronous motor.
(3) And adjusting the SVPWM output waveform according to the output voltage or the output frequency, controlling a three-phase bridge to drive the asynchronous motor, and operating at the minimum power at the set rotating speed.
Losses and efficiency of the motor include;
(1) when the motor converts electric energy into mechanical energy, a part of energy is consumed by the motor, the loss can be generally divided into winding loss, iron core loss, wind friction loss and load stray loss, the efficiency of the motor is the ratio of effective output power to input power, the effective output power is the difference between the input power and the power consumption of the motor, and the purpose of improving the efficiency of the motor can be achieved by effectively reducing the power consumption of the motor.
(2) The frequency of a working power supply of the motor is changed, the novel energy-saving technology is mainly used for correspondingly adjusting the working requirement of the motor, so that the energy efficiency of the motor reaches the optimal state, and the technology is widely applied to industrial production.
(3) The Y-type motor in a rotating state can absorb a large amount of useless energy, so that more extra loss of electric energy is caused, and the operation efficiency of the system is reduced.
(4) If the three-phase potential difference exists in the motor, the direction of a rotor in the motor is changed, the direction is opposite to the moving direction of a magnetic field, and the moving force of the rotor is influenced. The energy efficiency is generated on a motor bearing, the rotor absorbs the energy and is consumed as useless energy in the motor, so that the mechanical energy consumption of the motor is reduced, the direction of the rotor is opposite to that of a magnetic field during rotation, a large amount of extra energy is consumed in the process, the energy consumption of the motor is increased, the temperature of the motor is overhigh due to heat energy conversion, the three-phase potential difference in the motor is unified through the function of a circuit system, and the large motor energy consumption caused by the influence of the factor is reduced.
The selection of the high-efficiency motor comprises the following steps;
(1) high-efficiency motors YX and other series generally refer to high-efficiency three-phase asynchronous motors, and the efficiency level can reach or exceed the energy-saving motor specified by the national standard of motor energy efficiency.
(2) The magnetic slot wedge is adopted to replace the original slot wedge, the magnetic slot wedge mainly reduces the no-load iron loss in the asynchronous motor, the no-load additional iron loss is generated in a stator core and a rotor core by harmonic magnetic flux caused by a cogging effect, the high-frequency additional iron loss induced by the stator core and the rotor core is called pulse oscillation loss, in addition, tooth parts of the stator and the rotor are regularly aligned and regularly staggered, the tooth surface cluster magnetic flux is changed, eddy current can be induced on a tooth surface wire layer to generate surface loss, the pulse oscillation loss and the surface loss are jointly called the high-frequency additional loss, the high-frequency additional iron loss accounts for 70% -90% of stray loss of the motor, and the other 10% -30% of loss is called load additional loss and is generated by magnetic leakage flux. Although the use of the magnetic slot wedge can reduce the starting torque by 10-20%, the iron loss of the motor adopting the magnetic slot wedge can be reduced by 60k compared with the motor adopting the common slot wedge, and the magnetic slot wedge is very suitable for the transformation of the motor with no-load or light-load starting.
The energy-saving effect of the high-efficiency motor comprises the following steps;
(1) compared with the common motor, the high-efficiency motor optimizes the overall design, selects high-quality copper windings and silicon steel sheets, reduces various losses, reduces the loss by 20-30 percent, and improves the efficiency by 2-7 percent.
(2) Compared with the common motor, the high-efficiency motor adopts high-quality materials and is optimally designed, so that the energy consumption is reduced by about 20% on average, and the super-high-efficiency motor consumes more than 30% less electric energy than the common motor.
One specific application of this embodiment is: when the motor converts the electric energy into the mechanical energy in the first phase, the motor also consumes a part of energy, the loss can be generally divided into winding loss, iron core loss, wind friction loss and load stray loss, the efficiency of the motor is the ratio of effective output power to input power, the effective output power is the difference between the input power and the power consumption of the motor, the self power consumption is effectively reduced, the purpose of improving the efficiency of the motor can be achieved, then, a magnetic slot wedge is adopted to replace an original slot wedge, the magnetic slot wedge mainly reduces the no-load iron loss in the asynchronous motor, the no-load additional iron loss is generated in the iron cores of the stator and the rotor by the harmonic magnetic flux caused by the tooth space effect in the motor, the high-frequency additional iron loss induced by the stator and the rotor in the iron cores is called pulse vibration loss, in addition, the tooth parts of the stator and the rotor are aligned and staggered occasionally, the, eddy currents may be induced in the tooth surface wire layer, resulting in surface losses. The pulse vibration loss and the surface loss are called high-frequency additional loss, which accounts for 70% -90% of the stray loss of the motor, and the other 10% -30% is called load additional loss and is generated by leakage magnetic flux. Although the starting torque can be reduced by 10-20% by using the magnetic slot wedge, the iron loss of the motor adopting the magnetic slot wedge can be reduced by 60k compared with the motor adopting the common slot wedge, the motor is very suitable for the transformation of the motor started in no-load or light-load, then, through the energy-saving effect of the high-efficiency motor, the overall design of the high-efficiency motor is optimized compared with the common motor, various losses are reduced by selecting high-quality copper windings and silicon steel sheets, the loss is reduced by 20-30%, the efficiency is improved by 2-7%, and compared with the common motor, because of adopting high-quality materials and optimizing the design, the energy consumption is reduced by about 20% on average, and compared with the common motor, the energy consumption of the ultra-high-efficiency motor is reduced by more than 30.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. The utility model provides a motor energy-saving technology, includes, adjusts asynchronous machine's rotational speed for setting for the rotational speed, the loss and the efficiency of motor, high-efficient motor select for use, high-efficient motor energy-saving effect, its characterized in that, adjusting asynchronous machine's rotational speed for setting for the rotational speed includes:
(1) detecting whether the rotating speed change value of the asynchronous motor is larger than a preset value or not by the real-time angular speed, and adjusting the output voltage of an asynchronous motor driver if the rotating speed change value of the asynchronous motor is larger than the preset value;
(2) if the detected rotating speed variation value of the asynchronous motor is not larger than the preset value, adjusting the output frequency of the asynchronous motor driver, wherein the output frequency comprises the following steps: calculating the output frequency of the asynchronous motor driver according to a PI algorithm, wherein the output frequency is equal to the product of the ratio of the set rotating speed to the actual rotating speed and the previous output frequency; the input value of the PI algorithm is a set value of angular speed, and the feedback value of the PI algorithm is the real-time angular speed of the asynchronous motor;
(3) and adjusting the SVPWM output waveform according to the output voltage or the output frequency, controlling a three-phase bridge to drive the asynchronous motor, and operating at the minimum power at the set rotating speed.
2. The motor energy saving technology of claim 1, wherein the losses and efficiency of the motor include;
(1) when the motor converts electric energy into mechanical energy, the motor also consumes a part of energy, the loss can be generally divided into winding loss, iron core loss, wind friction loss and load stray loss, the efficiency of the motor is the ratio of effective output power to input power, the effective output power is the difference between the input power and the power consumption of the motor, and the purpose of improving the efficiency of the motor can be achieved by effectively reducing the power consumption of the motor;
(2) the frequency of a working power supply of the motor is changed, which is a novel energy-saving technology, and the frequency is mainly adjusted correspondingly according to the working requirement of the motor, so that the energy efficiency of the motor reaches the optimal state, which is a technology widely applied in industrial production, for example, the frequency converter is mostly applied in the industrial production and is special for a fan and a water pump, and the frequency converter can not be interfered by factors such as seasons, climate, overload and the like, can be adjusted according to the production requirement of the motor, effectively reduces the waste of energy, and also ensures the working efficiency of the motor;
(3) because a large amount of useless energy can be generated in the circuit, the Y-shaped motor in a rotating state can absorb the energy, more extra loss of electric energy is caused, and the operation efficiency of the system is reduced;
(4) if the three-phase potential difference exists in the motor, the direction of a rotor in the motor is changed, the direction is opposite to the moving direction of a magnetic field, and the moving force of the rotor is influenced. The energy efficiency is generated on a motor bearing, the rotor absorbs the energy and is consumed as useless energy in the motor, so that the mechanical energy consumption of the motor is reduced, the direction of the rotor is opposite to that of a magnetic field during rotation, a large amount of extra energy is consumed in the process, the energy consumption of the motor is increased, the temperature of the motor is overhigh due to heat energy conversion, the three-phase potential difference in the motor is unified through the function of a circuit system, and the large motor energy consumption caused by the influence of the factor is reduced.
3. The motor energy saving technology of claim 1, wherein the selection of the high-efficiency motor comprises:
(1) high-efficiency motors YX and other series generally refer to high-efficiency three-phase asynchronous motors, and the efficiency level can reach or exceed the energy-saving motor specified by the national standard of motor energy efficiency;
(2) the magnetic slot wedge is adopted to replace the original slot wedge, the magnetic slot wedge mainly reduces the no-load iron loss in the asynchronous motor, the no-load additional iron loss is generated in the iron cores of the stator and the rotor by the harmonic magnetic flux caused by the cogging effect in the motor, the high-frequency additional iron loss induced by the stator and the rotor in the iron cores is called pulse oscillation loss, in addition, the teeth of the stator and the rotor are aligned and staggered, the magnetic flux of the tooth surface and the tooth cluster is changed, eddy current can be induced on the surface of the tooth surface line layer to generate surface loss, pulse vibration loss and surface loss which are called high-frequency additional loss, wherein the high-frequency additional loss, the pulse vibration loss and the surface loss account for 70% -90% of stray loss of the motor, the other 10% -30% of the stray loss is called load additional loss, although the use of the magnetic slot wedge can reduce the starting torque by 10-20%, the iron loss of the motor adopting the magnetic slot wedge can be reduced by 60k compared with the motor adopting the common slot wedge, and the magnetic slot wedge is very suitable for the transformation of the motor with no-load or light-load starting.
4. The motor energy saving technology of claim 1, wherein the high efficiency motor energy saving effect comprises:
(1) compared with the common motor, the high-efficiency motor optimizes the overall design, selects high-quality copper windings and silicon steel sheets, reduces various losses by 20-30 percent and improves the efficiency by 2-7 percent;
(2) compared with the common motor, the high-efficiency motor adopts high-quality materials and is optimally designed, so that the energy consumption is reduced by about 20% on average, and the super-high-efficiency motor consumes more than 30% less electric energy than the common motor.
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| CN202011359321.2A CN112422020A (en) | 2020-11-27 | 2020-11-27 | Motor energy-saving technology |
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| CN202011359321.2A CN112422020A (en) | 2020-11-27 | 2020-11-27 | Motor energy-saving technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056778A (en) * | 1991-04-06 | 1991-12-04 | 鞍山钢铁公司 | Electric motor energy-saving improved method |
| CN102723829A (en) * | 2012-06-08 | 2012-10-10 | 重庆市乐尔佳机械有限公司 | Super-energy-saving 2200w dipolar three-phase asynchronous motor |
| CN108683380A (en) * | 2018-06-20 | 2018-10-19 | 无锡巨天自动化技术有限公司 | A kind of energy-saving control method of asynchronous machine |
| CN211127360U (en) * | 2019-12-13 | 2020-07-28 | 卧龙电气淮安清江电机有限公司 | Super-efficient motor stator magnetism slot wedge and motor stator |
| CN111756044A (en) * | 2019-03-28 | 2020-10-09 | 黑龙江省鸿鼎电力节能科技有限公司 | Intelligent system tracking and transmitting integrated power-saving control system |
-
2020
- 2020-11-27 CN CN202011359321.2A patent/CN112422020A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056778A (en) * | 1991-04-06 | 1991-12-04 | 鞍山钢铁公司 | Electric motor energy-saving improved method |
| CN102723829A (en) * | 2012-06-08 | 2012-10-10 | 重庆市乐尔佳机械有限公司 | Super-energy-saving 2200w dipolar three-phase asynchronous motor |
| CN108683380A (en) * | 2018-06-20 | 2018-10-19 | 无锡巨天自动化技术有限公司 | A kind of energy-saving control method of asynchronous machine |
| CN111756044A (en) * | 2019-03-28 | 2020-10-09 | 黑龙江省鸿鼎电力节能科技有限公司 | Intelligent system tracking and transmitting integrated power-saving control system |
| CN211127360U (en) * | 2019-12-13 | 2020-07-28 | 卧龙电气淮安清江电机有限公司 | Super-efficient motor stator magnetism slot wedge and motor stator |
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| Title |
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| 冯华林: "电机节能降耗技术和方法浅析" * |
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