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Motor energy-saving method and device based on frequency converter and electronic equipment

A motor energy-saving and motor technology, which is applied in the direction of AC motor control, motor parameter estimation/correction, electrical components, etc., to achieve the effect of ensuring stability and saving energy consumption

Pending Publication Date: 2021-01-15
深圳市阿尔法电气技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides an inverter-based motor energy-saving method, device and electronic equipment to solve the problem of how to save energy and ensure production safety in the prior art

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  • Motor energy-saving method and device based on frequency converter and electronic equipment
  • Motor energy-saving method and device based on frequency converter and electronic equipment
  • Motor energy-saving method and device based on frequency converter and electronic equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides an inverter-based motor energy-saving method, which can be applied in the process of motor power generation to electric power, such as figure 1 shown, including the following steps:

[0035] S1, obtain the output voltage and current of the motor, and calculate the actual phase of the motor according to the output voltage and current of the motor.

[0036] In this embodiment, the output voltage of the motor may be a preset working voltage of the motor, and the output current of the motor may be the working current of the motor detected by the current sensor. The actual phase of the motor is the difference data between the voltage phase angle and the current phase angle calculated by using the phase formula according to the output voltage and current of the motor. E.g: is the output voltage angle of 120°, is the current angle of 90°, then the actual phase of the motor

[0037] S2, using the actual phase of the motor to calculate the phase ...

Embodiment 2

[0070] This embodiment provides a frequency converter-based energy-saving method for an oil field production motor, which can be applied to oil field production, for example, an oil production device. This method adds a group of functional parameter configurations to the original parameter configuration, and changes and adjusts the frequency output of the frequency converter in the state of motor power generation, so as to realize the change of the output energy consumption of the motor. Compared with the traditional energy-consumption braking method, In this embodiment, the increase of the bus voltage can be suppressed by means of software, and the purpose of energy saving can be achieved at the same time.

[0071] In addition, it needs to be explained that in this embodiment, the oilfield mining motor can be a three-phase asynchronous motor, and its operating state depends on the relative relationship between the rotating magnetic field speed (synchronous speed) and the actua...

Embodiment 3

[0096] This embodiment provides a motor energy-saving device based on frequency converter, such as Figure 5 shown, including:

[0097] The obtaining module 1 is used to obtain the output voltage and current of the motor, and calculate the actual phase of the motor according to the output voltage and current of the motor. For details, refer to step S1.

[0098] The calculation module 2 is used to calculate the phase difference between the actual phase of the motor and the target phase of the motor by using the actual phase of the motor. For details, refer to step S2.

[0099] The output module 3 is used to determine the frequency value of the error adjustment based on the phase difference, and superimpose the frequency value of the error adjustment with the preset frequency to obtain the current frequency value, which is used to adjust the current output current of the motor to change the output of the motor For energy consumption, refer to step S3 for details.

[0100] In t...

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PUM

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Abstract

The invention relates to a motor energy-saving method and device based on a frequency converter and electronic equipment, and particularly relates to the field of the electronic equipment. The methodcomprises the following steps: acquiring an output voltage and a current of a motor, and calculating an actual phase of the motor according to the output voltage and the current of the motor; calculating a phase difference between the actual phase of the motor and the target phase of the motor by using the actual phase of the motor; and determining an error adjustment frequency value based on thephase difference, and superposing the error adjustment frequency value with a preset frequency to obtain a current frequency value which is used for adjusting the current output current of the motor to change the output energy consumption of the motor. The actual phase of the motor is calculated by obtaining the output voltage and the current of the motor, the obtained actual phase is compared with the target phase to obtain the phase difference between the target phase and the actual phase, and error adjustment is performed through the obtained phase difference. The energy consumption of themotor is saved by changing an operation frequency of the motor to adjust the current of the motor.

Description

technical field [0001] The invention relates to the field of electronic equipment, in particular to a frequency converter-based motor energy-saving method, device and electronic equipment. Background technique [0002] When the motor is in the power generation state, the motor speed exceeds the synchronous speed, and the regenerative energy is fed back to the DC bus through the rectification of the freewheeling diode connected in parallel with the inverter bridge switching device (eg IGBT) of the inverter. However, the DC bus of the general-purpose frequency converter is powered by an ordinary diode rectifier bridge, which cannot feed back electric energy to the grid. The accumulation of regenerative energy will increase the bus voltage, which seriously threatens the safety of the bus capacitor and power switching devices, and when the bus voltage rises to a certain level , the inverter connected to the motor will enter the automatic protection shutdown state, so that the mo...

Claims

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Application Information

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IPC IPC(8): H02P23/00H02P23/14H02P27/06
CPCH02P23/0004H02P23/14H02P27/06
Inventor 杨云亮毕涛
Owner 深圳市阿尔法电气技术有限公司