一种变频控制系统测试装置
By using modularly designed variable frequency control test fixtures and load motors, the problems of high energy consumption and low efficiency in variable frequency compressor testing are solved, enabling accurate testing and fault location under laboratory conditions, and supporting the iteration of variable frequency control algorithms and the reliability testing of hardware circuits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies suffer from high energy consumption, low efficiency, and poor safety when testing variable frequency control systems for variable frequency compressors. This is especially true in the actual operation of water-cooled units, where resource consumption is high and costs are high, and it is difficult to accurately measure the cooling effect.
The variable frequency control test fixture adopts a modular design, uses an adjustable power supply to simulate the actual power supply, and uses the load motor as an equivalent air conditioning compressor. Combined with the human-machine interface and control board, it realizes the iteration of variable frequency control algorithm and the reliability test of hardware circuit, providing a verification platform.
Accurately simulate frequency conversion control under laboratory conditions, reduce energy consumption, improve testing efficiency, locate hardware fault points, support algorithm iteration, reproduce faults, and enhance safety.
Smart Images
Figure CN224519184U_ABST
Abstract
Claims
1. A variable frequency control system testing device for testing a variable frequency control system for an air conditioner compressor, characterized by, The frequency conversion control system testing device includes: An adjustable power supply that receives an external AC power source and outputs an adjustable voltage including the actual power source used for the inverter control of the air conditioning compressor; The load motor serves as the equivalent mechanical load for the air conditioning compressor. Variable frequency control test fixture, which includes: A rectifier circuit that receives the adjustable voltage; A power board is provided, with the output terminal of the rectifier circuit connected to the power board, which is used for level conversion. The rectifier circuit provides DC voltage to the IGBT module; The control board integrates a frequency conversion control algorithm and outputs drive signals for driving the IGBT module. The interface board, wherein the drive signal is output to the interface board after being level-converted by the power board; The driver board receives the converted drive signal forwarded by the interface board and is used to drive the IGBT module. A parameter acquisition unit is used to acquire the dynamic parameters of the load motor in real time; Storage unit, which is used to cache the dynamic parameters; The human-machine interface terminal is communicatively connected to the storage unit and the control board, respectively. The human-machine interface terminal can receive dynamically configured input parameters and output output parameters related to the frequency conversion control of the load motor.
2. The variable frequency control system testing device of claim 1, wherein, The frequency conversion control system testing device also includes: The adjustable power supply and the frequency converter control test fixture are both housed in the test cabinet. The touch screen, the human-machine interface, is mounted on the cabinet of the test cabinet. The touch screen can locally receive dynamically configured parameters and output output parameters related to the frequency conversion control of the load motor.
3. The variable frequency control system testing device of claim 1, wherein, The adjustable power supply includes: A power converter that receives an external 220V AC power supply and converts it to output 380V AC power. An adjustable transformer receives the power output from the power converter and is adjustable to a wide range of voltages from 0 to 750V. A circuit breaker is connected between the output of the adjustable transformer and the input of the rectifier circuit.
4. The frequency conversion control system testing device according to claim 2, characterized in that, The frequency converter test control fixture also includes a power indicator light, which is used to issue a power-on indication when the frequency converter control test fixture is powered on. The power indicator light is located on the cabinet of the test cabinet.
5. The variable frequency control system testing device of claim 3, wherein, The frequency conversion control system testing device also includes: An absorption plate is used to monitor voltage signal fluctuations of the adjustable power supply and voltage signal fluctuations of the load motor, and send the data to the power supply board.
6. The frequency conversion control system testing device according to claim 5, characterized in that, The absorption plate uses an RC buffer circuit.
7. The frequency conversion control system testing device according to claim 1, characterized in that, The IGBT module includes six IGBT switching transistors, including two IGBT switching transistors for the upper and lower bridge arms of the U phase, two IGBT switching transistors for the upper and lower bridge arms of the V phase, and two IGBT switching transistors for the upper and lower bridge arms of the W phase. The interface board includes a first interface sub-board, a second interface sub-board, and a third interface sub-board. The driver board includes a first driver sub-board, a second driver sub-board, and a third driver sub-board. The drive signal output by the power board is divided into a first drive sub-signal, a second drive sub-signal, and a third drive sub-signal. The first drive sub-signal controls the two IGBT switching transistors of the upper and lower bridge arms of the U phase through the first interface sub-board and the first drive sub-board; The second drive sub-signal controls the two IGBT switching transistors of the upper and lower bridge arms of the V phase through the second interface sub-board and the second drive sub-board; The third driving sub-signal controls the two IGBT switching transistors of the upper and lower bridge arms of the W phase through the third interface sub-board and the third driving sub-board.
8. The frequency conversion control system testing device according to claim 1, characterized in that, The frequency conversion control test fixture also includes a filter circuit, which is connected between the rectifier circuit and the power supply board.
9. The variable frequency control system testing device of claim 1, wherein, The human-machine interface is a host computer that can remotely receive dynamically configured input parameters and output output parameters related to the frequency conversion control of the load motor.