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Integrated scroll compressor and method and device for reducing power consumption of frequency converter thereof

A scroll compressor, integrated technology, applied in the direction of output power conversion device, support structure installation, power electronics modification, etc., can solve the problems of difficult to reduce, the carrier frequency affects the motor control performance, etc., to improve the anti-vibration The effect of reducing vibration and shock

Active Publication Date: 2019-03-19
江西滨凌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

W C It is related to the working current and the internal resistance of the power tube. When the power tube model is determined, this part of the loss is basically determined, and it is difficult to reduce it; W S It is related to the PWM carrier frequency and the switching speed of the power tube. When the pre-amplifier circuit of the power tube is determined, its switching speed is fixed. The only way to reduce WS is to reduce the carrier frequency, but the carrier frequency affects the motor control. performance, and cannot be arbitrarily reduced; W D It is related to the forward voltage drop of the diode through which the freewheeling current flows. If the freewheeling path can be changed, it is possible to reduce the freewheeling loss

Method used

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  • Integrated scroll compressor and method and device for reducing power consumption of frequency converter thereof
  • Integrated scroll compressor and method and device for reducing power consumption of frequency converter thereof
  • Integrated scroll compressor and method and device for reducing power consumption of frequency converter thereof

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Embodiment 1

[0058] Such as Figure 1 ~ Figure 3 As shown, this embodiment provides an integrated scroll compressor, the compressor includes a housing 1, a frequency converter 2 and a motor, the frequency converter 2 and the motor are arranged in the housing 1, and the motor has a three-phase terminal 3 , the three phases refer to U phase, V phase and W phase, which will not be repeated below.

[0059] Described casing 1 comprises box cover 101 and base 102, and motor is arranged in the base 102, box cover 101 and base 101 are detachably connected, and form the accommodating chamber 103 that is used to place frequency converter 2, the space size of accommodating chamber 103 varies with The size of the lid 101 varies.

[0060] Such as Figure 1 to Figure 5 As shown, the frequency converter 2 is a 24V frequency converter, which includes a circuit board 201, a three-phase full-bridge power tube and three torsion spring terminals 202. The circuit board 201 is integrated with a single-chip mi...

Embodiment 2

[0065] Such as Figure 8 As shown, this embodiment provides a method for reducing the power consumption of the frequency converter of the integrated scroll compressor, which is mainly realized by the single-chip microcomputer of the frequency converter, including the following steps:

[0066] S801. Control the duty ratio of the pulse width modulation to reduce the switching loss of the upper bridge power transistor in the three-phase full bridge power transistor.

[0067] For the motor of the integrated scroll compressor, the 120-degree PWM-ON control method is adopted, that is, the power tube of the upper bridge works in the pulse width modulation mode of fast on-off to adjust the current of the motor. The actual speed, using the motor speed as the feedback signal to adjust the duty ratio of the pulse width modulation, and indirectly controlling the motor current to control the motor speed, as the load of the air conditioner increases, the single-chip microcomputer in the fre...

Embodiment 3

[0074] Such as Figure 12 As shown, this embodiment provides an integrated scroll compressor inverter power consumption reduction device, the device includes a duty cycle control module 1201, a synchronous rectification control module 1202 and a frequency converter power loss reduction module 1203, each The specific functions of the module are as follows:

[0075] The duty ratio control module 1201 is used to control the duty ratio of the pulse width modulation to reduce the switching loss of the upper bridge power transistor in the three-phase full bridge power transistor.

[0076] The synchronous rectification control module 1202 is used for off-line self-learning synchronous rectification control to reduce freewheeling losses of all power transistors in the three-phase full-bridge power transistors.

[0077] The frequency converter power loss reduction module 1203 is used to reduce the switching loss of the upper bridge power tube in the three-phase full-bridge power tube ...

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Abstract

The invention discloses an integrated scroll compressor and a method and device for reducing the power consumption of the frequency converter thereof. The compressor comprises a casing, a frequency converter and a motor, wherein the frequency converter and the motor are disposed in the casing; the frequency converter comprises a circuit board, a three-phase full-bridge power tube and three torsionspring terminals; the three-phase full-bridge power tube is packaged on the front side of the circuit board; the three torsion spring terminals are inserted from the front side of the circuit board and extend out of the back side of the circuit board; and the three torsion spring terminals are aligned and connected with the three-phase binding posts of the motor. The method enables the frequencyconverter of the integrated scroll compressor to have a good heat dissipation effect, reduces the power loss of the frequency converter of the integrated scroll compressor by a duty ratio control andoffline self-learning synchronous rectification control mode, and ensures that the temperature of the power tube of the frequency converter is still within a safe range even if the cooling power of the compressor is increased.

Description

technical field [0001] The invention relates to an integrated scroll compressor and a method and device for reducing power consumption of a frequency converter thereof, and belongs to the field of heat dissipation and power consumption reduction of frequency converters of scroll compressors for vehicle air conditioners. Background technique [0002] The integrated electric scroll compressor for vehicle air conditioner refers to the scroll compressor, the permanent magnet synchronous motor driving the compressor, and the inverter controlling the motor are all installed in a compact aluminum housing. 24V inverter refers to the inverter powered by 24V battery DC. The cooling power of vehicle air conditioners is larger than that of ordinary household air conditioners, but the power supply voltage is an order of magnitude smaller, resulting in an order of magnitude larger drive current than ordinary household air conditioners. The inverter matched with the 24V scroll compressor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H05K7/14H05K7/20H02P27/04
CPCH02M1/00H02P27/04H05K7/1432H05K7/2089H02M1/0048H02M1/0054Y02B70/10
Inventor 刘巳伟肖兵郭灼炎
Owner 江西滨凌科技有限公司
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