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Control system and method of electric compressor of new energy automobile

A technology for electric compressors and new energy vehicles, used in vehicle components, heating/cooling equipment, air handling equipment, etc., can solve problems such as unstable compressor operation, improve good experience, increase mileage, and improve control. The effect of precision

Inactive Publication Date: 2018-02-16
RIZHAO POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another object of the present invention is to provide an electric compressor control system and control method for a new energy vehicle, which stabilizes the input voltage of the compressor through multi-stage regulation, thereby controlling the stable operation and accurate temperature output of the compressor, and solving the problem of the compressor Unstable technical issues

Method used

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  • Control system and method of electric compressor of new energy automobile
  • Control system and method of electric compressor of new energy automobile
  • Control system and method of electric compressor of new energy automobile

Examples

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Embodiment 1

[0039] The present invention provides an electric compressor control system for a new energy vehicle, such as Figure 1-3 As shown, it includes an inverter module, a transducer module, a voltage divider module and a voltage stabilization control unit.

[0040] The input terminal of the inverter module is connected to the output terminal of the battery pack 1 through the controllable switch S1. In this embodiment, the inverter module is composed of four IGBTs, including the first switching tube Q1 to the fourth switching tube Q4 and the first Diode D1 to the fourth diode D4, the input terminal of the transduction module is connected to the output terminal of the inverter module, and the transduction module is a step-up transformer T1, which plays the role of voltage isolation and boosting, so The primary coil of the step-up transformer is connected to the output terminal of the inverter module through a filter, and the filter is an LCL filter including a first inductor L1, a se...

Embodiment 2

[0053] The interleaved boosting circuit 14 includes a first boosting branch, a second boosting branch, a third boosting branch and a fourth capacitor C4 arranged at the output end of the interleaving boosting circuit 14 arranged in parallel.

[0054] The first step-up branch includes a third inductor L3, a fifth switching tube Q5, a fourth inductor L4, a fifth diode D5, and an eighth switching tube Q8, and the third inductor L3, the fifth switching tube Q5 connected in series with the second pentode D5 at the positive terminal of the battery pack 1, the fourth inductance L4 is connected in parallel with both ends of the fifth switching tube Q5, and the input terminal of the eighth switching tube Q8 is connected to the The output terminal of the fifth switching tube Q5; the second boosting branch includes a fifth inductor L5, a sixth switching tube Q6, a sixth inductor L6, a sixth diode D6 and a ninth switching tube Q9, the first The fifth inductor L5, the sixth switching tube ...

Embodiment 3

[0058] A method for controlling an electric compressor of a new energy vehicle, comprising the following steps:

[0059] Step 1, the third electrical signal collector 16 collects the voltage signal of the output terminal of the battery pack 1 in real time and transmits it to the main controller 15 to monitor the output voltage of the battery pack. When the motor starts, accelerates and stops, it will cause large fluctuations in the output voltage of the battery pack, affecting the normal operation of the compressor, causing the air conditioning system to be hot and cold, and affecting the passenger experience. For this reason, when the output terminal voltage of the battery pack 1 fluctuates momentarily, the main controller 15 collects the feedback signal according to the third electrical signal collector 16 and simultaneously collects the electrical signal on the motor driver 8 according to the first signal collector 6, The main controller performs intervention control in adv...

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Abstract

The invention discloses a control system and method of an electric compressor of a new energy automobile. The control system comprises an inverse variation module, an energy conversion module, a voltage distributing module, compressor drivers, a brake energy recovering device and a main controller. The input end of the inverse variation module is connected with the output end of a battery pack, the input end of the energy conversion module is connected with the output end of the inverse variation module, and the voltage distributing module is connected to the output end of the energy conversion module and comprises at least two capacitors arranged in a series-connection mode, wherein one capacitor is adjustable, and the adjustable capacitor is provided with a capacitance value adjusting mechanism. The compressor drivers are arranged at the two ends of the adjustable capacitor, the input end of the brake energy recovering device is connected with the stator end of a car driving motor, and the main controller is connected with the capacitance value adjusting mechanism, a compressor controller and the control end of the driving motor, and the two ends of the battery pack are further provided with staggered voltage-increasing circuits. According to the control system and method of the electric compressor of the new energy automobile, the technical problem that operation of a compressor is instable is solved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, and more specifically, the invention relates to a control system and a control method for an electric compressor of a new energy vehicle. Background technique [0002] The compressor in the new energy vehicle air conditioner is usually driven by a power battery pack and shares the battery pack with the car drive motor at the same time. Due to the large power consumption of the compressor and the low voltage of the car's own battery, most electric vehicles The battery capacity is limited, which greatly reduces the mileage of electric vehicles. It is a short-distance transportation tool, and the ride time is short. In addition, electric vehicles increase the heat generated by the battery, and the relative heat load is relatively large. The air conditioner is required to have rapid cooling and low-speed operation capabilities. At the same time, when the drive motor is running, it has a g...

Claims

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Application Information

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IPC IPC(8): B60H1/32
CPCB60H1/3205B60H1/3216B60H1/3222
Inventor 刘成好
Owner RIZHAO POLYTECHNIC
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