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Vector control system, control method and device, air conditioner and storage medium

A technology of vector control and field weakening control, applied in vector control systems, control systems, control of electromechanical brakes, etc., can solve problems such as increasing product costs

Inactive Publication Date: 2019-05-17
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In related technologies, the problem of low-temperature heating of outdoor heat exchangers is solved by compressor technologies such as painting enthalpy-increasing frequency conversion compressor technology or two-stage compression frequency conversion, but the above solutions all need to be equipped with special-structured compressors. The compressor not only needs to increase the product cost, but also needs to make relatively large improvements to the overall structure

Method used

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  • Vector control system, control method and device, air conditioner and storage medium
  • Vector control system, control method and device, air conditioner and storage medium
  • Vector control system, control method and device, air conditioner and storage medium

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Embodiment 1

[0055] like figure 1 As shown, the vector control system provided according to the embodiment of the present invention is suitable for variable frequency compressors, including: a control module and a variable frequency drive module 108, wherein, as Figure 5 As shown, the control module includes: a field weakening control unit 102 for outputting a field weakening current; a reactive current control unit 104 for injecting reactive current into the field weakening control unit 102 so that the field weakening control unit 102 modulates the field weakening current according to the reactive current; the maximum torque current ratio control unit 106 receives the input given torque and the modulated field weakening current, and according to the given torque, preset Set the torque current coefficient and the field weakening current to output a given quadrature axis current and a given direct axis current; adjust the module, the adjustment module receives the given quadrature axis cur...

Embodiment 2

[0079] like Image 6 As shown, the operation control method according to the embodiment of the present invention includes: step 602, in the heating mode, inject reactive current into the vector control system, and increase the three-phase current input of the variable frequency compressor by injecting reactive current, so that The permanent magnet synchronous motor in the inverter compressor dissipates heat.

[0080] The operation control method provided by the embodiment of the present invention is applicable to an air conditioner. The air conditioner is equipped with an inverter compressor controlled by a vector control system. During the heating process or / and defrosting process, the temperature of the outdoor environment is detected. Determine whether the permanent magnet synchronous motor needs to generate heat and dissipate heat to reduce the probability of frosting on the outdoor heat exchanger or assist in defrosting. When the outdoor ambient temperature is lower than ...

Embodiment 3

[0090] like Figure 1 to Figure 5 As shown, the embodiment of the present invention provides a low-temperature heating control method based on reactive current of a compressor and a circuit device thereof.

[0091] like figure 1 As shown, the circuit device includes a control chip, a three-phase bridge drive circuit composed of a power switch tube and an inverter compressor. Wherein, the driving circuit may be composed of 6 IGBTs, or 6 MOSFETs, or adopt an intelligent power module IPM, and have anti-parallel diodes at the same time. The control chip outputs a compressor driving signal, and the compressor driving signal controls the operation of the variable frequency compressor through the driving circuit, and detects the phase current of the compressor through the current sensor (three or two or one). The variable frequency compressor is a compressor driven by a permanent magnet synchronous motor.

[0092] In the heating process or / and defrosting process, inject reactive c...

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Abstract

The invention provides a vector control system, a control method and device, an air conditioner and a storage medium. The vector control system comprises a control module and a variable frequency drive module, wherein the control module comprises a weak magnetic current, a maximum torque current ratio control unit and an adjustment module; the variable frequency drive module receives an input pulse width modulation signal and is used for inverting the DC signal into a three-phase AC signal to input the signal in a permanent magnet synchronous motor, wherein the current output of the three-phase AC signal is increased by injecting the weak magnetic current so as to make the permanent magnet synchronous motor generate heat. The vector control system increases the current output of the three-phase AC signal by injecting a weak magnetic current into the permanent magnet synchronous motor such that the permanent magnet synchronous motor can generate heat, which realizes the function of low-temperature heating only needing to increase the weak magnetic current by means of software control with no need to modify the existing compressor structure. And the vector control system is applied to the outdoor unit of the air conditioner, which helps to reduce the production cost of the enterprise with a simple structure and is easy to implement.

Description

technical field [0001] The present invention relates to the technical field of low-temperature heating, in particular to a vector control system, an operation control method and a computer-readable storage medium. Background technique [0002] In related technologies, the problem of low-temperature heating of outdoor heat exchangers is solved by compressor technologies such as painting enthalpy-increasing frequency conversion compressor technology or two-stage compression frequency conversion, but the above solutions all need to be equipped with special-structured compressors. The compressor not only needs to increase the product cost, but also needs to make relatively large improvements to the overall structure. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004] Therefore, an object of the present invention is to provide a vector control system. [0005] Another...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/18H02P27/08
Inventor 堀部美彦黄招彬李金波徐振坤
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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