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How We Ensure Product Quality in Inverter Production
In the inverter production process, we ensure product quality through strict full-process and multi-dimensional control, with specific measures covering the following five core links:- Source Control of Raw Materials
Core components (such as IGBT modules, capacitors, and chips) are exclusively procured from internationally renowned brands to eliminate the risk of inferior materials at the source. All raw materials must undergo precise electrical parameter testing and comprehensive visual inspection before entering the warehouse. Additionally, we maintain a list of qualified suppliers and conduct regular evaluations to ensure consistent supply chain quality.- Precise Control of the Production Process
Automated Optical Inspection (AOI) technology is applied in the Surface Mount Technology (SMT) assembly process to identify solder paste defects and component misalignment in real time. After wave soldering, X-ray testing is performed to thoroughly inspect for solder joint quality issues (e.g., cold joints, voids). The entire production line is equipped with an Electrostatic Discharge (ESD) protection system to prevent electrostatic damage to sensitive components. We set up dedicated quality control checkpoints for key processes and implement 100% full inspection to block unqualified semi-finished products from moving to the next process.- Comprehensive Functional and Performance Testing
All inverters are required to complete 100% load burn-in testing—operating at full load in a high-temperature environment (typically 45–60°C) for 24–48 hours to verify long-term stability. Electrical safety tests are conducted, covering critical items such as withstand voltage (1.5kV AC for 1 minute), insulation resistance (≥100MΩ at 500V DC), and ground resistance (≤0.1Ω), to ensure compliance with electrical safety standards. Performance parameters, including frequency accuracy (±0.1%), voltage regulation (±0.5%), and current precision (±1%), are precisely calibrated to guarantee reliable operational performance. We also conduct environmental adaptability tests (including high-low temperature cycles, humidity exposure, and vibration resistance) to validate the product’s reliability under complex working conditions.- Full-Lifecycle Quality Traceability
Each inverter is assigned a unique serial number, enabling full-lifecycle tracking from raw material procurement to after-sales service. We record and archive the entire production process data in real time—including raw material batch numbers, production process parameters (e.g., soldering temperature, inspection results), and final test reports. When traceability is required, the complete manufacturing history of any inverter can be retrieved quickly and accurately, facilitating efficient problem localization and resolution.- After-Sales Feedback and Continuous Optimization
We have established a fast-response mechanism for customer feedback, ensuring that quality-related issues are addressed within 24 hours of receipt. Our quality team conducts regular analysis of after-sales quality data to identify potential improvement points (e.g., component failure trends, user operation-related issues). Based on feedback results and test data, we continuously optimize product design (e.g., enhancing heat dissipation structures) and production processes (e.g., upgrading soldering parameters), forming a closed-loop quality improvement cycle of “production-feedback-optimization”.In addition, we hold the ISO 9001 Quality Management System certification, and our inverters comply with international standards such as CE (for the European market) and RoHS (for environmental protection requirements). For OEM customers, we can also provide customized additional quality control measures (e.g., dedicated inspection teams) or third-party testing services (e.g., TÜV and UL certification testing) to further strengthen quality assurance for their specific markets. -
Our VFD OEM Service Quality Control Process
We implement a strict quality control process for our inverter OEM services, covering the following key stages:1. Raw Material Control- Core components (including IGBT modules, capacitors, and chips) are sourced exclusively from international renowned brands
- Rigorous electrical parameter testing and visual inspection are conducted before warehouse entry
- A qualified supplier list is maintained, with regular performance evaluations to ensure consistency
2. Production Process Control- Automated Optical Inspection (AOI) is applied during the SMT (Surface Mount Technology) assembly process
- X-ray testing is performed after wave soldering to guarantee solder joint quality
- The entire production line is equipped with an ESD (Electrostatic Discharge) protection system
- Quality checkpoints are set at key processes, with 100% inspection to eliminate defects
3. Functional & Performance Testing- 100% load burn-in testing (full-load operation in a high-temperature environment) is carried out
- Electrical safety tests are conducted, including withstand voltage, insulation resistance, and ground resistance tests
- Performance parameters (such as frequency, voltage, and current accuracy) are calibrated precisely
- Environmental adaptability tests are performed to verify resistance to extreme temperatures, humidity, and vibration
4. Quality Traceability System- Each product is assigned a unique serial number for full lifecycle tracking
- Comprehensive production data is recorded and archived in real time
- The manufacturing history of any product can be traced quickly and accurately
5. After-sales Quality Feedback- A fast-response mechanism is established to address customer feedback promptly
- Regular quality data analysis is conducted to identify improvement opportunities
- Design and production processes are continuously optimized based on feedback and test results
We hold ISO 9001 quality management system certification, and our products comply with international standards such as CE and RoHS. For OEM customers, we can also provide additional quality control measures or third-party testing services tailored to your specific requirements. -
Your company can provide OEM customization of frequency converters？
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DreamWe inverter performance? Measured performance and user evaluation analysis
DreamWe inverter performance? Measured performance and user evaluation analysis
In the industrial equipment and pump control system, the performance of the inverter directly affects the operating efficiency and stability of the equipment.DreamWe as a brand focusing on frequency conversion technology, its inverter performance in the market has attracted much attention. In this paper, we will analyze the actual performance of DreamWe inverter through actual measurement data and user feedback, and provide reference for users who have the need to choose and buy.
First, a wide range of adaptability: covering multiple types of pumps and voltage scenarios
One of the core advantages of DreamWe inverters lies in its strong adaptability. Tests show that whether it is a family or small industrial scenes commonly used single-phase 220V water pump (such as water pumps, small submersible pumps), or large industrial equipment equipped with three-phase 380V water pumps (such as centrifugal pumps, deep-well pumps), it can be stable and compatible.
In the test of different power pumps, single-phase water pumps below 1.5kW connected to DreamWe inverters, the peak starting current was reduced by about 30% compared with direct starting, effectively reducing the impact on the power grid; while 380V centrifugal pumps above 5.5kW were adapted and the voltage fluctuation during operation was controlled to within ±2%, with no shutdowns caused by unstable voltage. This means that DreamWe inverters can provide reliable support for both low-power civil and high-power industrial scenarios.
Test Performance: Efficiency, Stability and Energy Saving
1. Operation Efficiency: Enhancing the Working Efficiency of Water Pumps
In a continuous 8-hour running test for a 1.1kW single-phase submersible pump, the conversion efficiency of DreamWe frequency converter is stable at more than 95%, which is 3%-5% higher than that of ordinary frequency converters. Its vector control technology can adjust the motor speed in real time, so that the pump automatically reduces its speed when the flow demand is low, avoiding the waste of energy caused by the “big horse and small car”. Data show that under the same working conditions, the average daily power consumption of water pumps using DreamWe frequency converter is about 12% less than that of traditional control methods.
2. Stability: Ability to cope with complex working conditions
In the test of simulated voltage fluctuation (voltage fluctuates between 180V-240V in 220V scenario, and between 340V-410V in 380V scenario), the over-voltage/under-voltage protection of DreamWe frequency converter responds quickly, and the protection mechanism can be triggered within 0.3 seconds to prevent the pump motor from burning due to the abnormal voltage. Meanwhile, in the humid environment (85% humidity) and dusty environment, its sealing design effectively prevents the components from moisture or dust accumulation, and it runs continuously for 30 days without failures.
3. Intelligent Functions: Simplify Operation and Monitoring
DreamWe inverters are equipped with LED displays that can show parameters such as speed, current and temperature in real time, so that users can keep track of the operating status without additional equipment. Some models support remote control function, and through the cell phone APP, users can adjust the speed of the pump or check the fault code. This design is especially well received in industrial scenarios, which reduces the cost of manual inspection.
User Evaluation: Feedback from Real Scenarios
1. Feedback from Industrial Users
The person in charge of a chemical factory, which purchased three DreamWe 380V inverters for controlling 6kW centrifugal pumps, said, “In the past half year of operation, the equipment has never been shut down due to inverter failure, and the monthly electricity cost has saved nearly 2,000 yuan compared with the previous brand, so the stability and energy saving have exceeded expectations. Stability and energy saving are beyond expectation.”
2. Feedback from Civil Scene
A farmer who installed a 220V water pump mentioned: “The voltage at home is not too stable, and the water pump often tripped in the past, but after replacing the DreamWe frequency converter, even if the voltage fluctuates, the water pump works normally, and the pumping speed is more uniform than before.” 3.
3. Maintenance master evaluation
engaged in water pump maintenance for many years, Mr. Wang said: “DreamWe inverter failure rate is very low, and occasional problems, the fault code is clear, troubleshooting is very convenient, and it is very friendly to our maintenance staff.”
Fourth, summarize: DreamWe inverter is worth choosing?
From the measured data and user feedback, DreamWe inverter is outstanding in terms of adaptability, efficiency and stability, especially in the scenario of large voltage fluctuations, the advantages are obvious, and the energy-saving effect has been verified in multiple scenarios. Whether it is a small power pump for civil use or a high-power device for industrial use, DreamWe can provide reliable control support. If you are looking for an inverter that combines performance and cost-effectiveness, DreamWe is undoubtedly worth considering! -
How about the DreamWe brand inverter?
We can introduce the inverter from the aspects of speed regulation performance, energy saving effect, protection function, compatibility, etc. The following are the details:
Excellent speed regulation performance: Our inverter adopts advanced control technology, which can adjust the proportional relationship between output voltage and frequency in real time according to load requirements. It has a wide speed regulation range, high precision, fast response speed, and can accurately meet the control requirements of motor speed under different working conditions.
Significant energy saving effect: It can automatically adjust the power supply voltage and frequency according to the actual load of the motor, so that the motor can run efficiently even at low load and reduce energy loss. For equipment such as pumps and fans, the power consumption of the motor is proportional to the cube of the speed. The frequency conversion speed regulation can greatly save electricity.
Perfect protection function: It has multiple protection functions such as overcurrent, overvoltage, overload, overheating, undervoltage, short circuit, etc. When the motor or inverter is abnormal, it can quickly detect and cut off the power supply or reduce the motor speed, effectively preventing equipment damage and ensuring safe and stable operation of the system.
Excellent soft start function: It can realize the soft start of the motor, so that the voltage is slowly increased from zero to the rated voltage, avoiding the impact torque during the startup process, reducing the impact on the power grid and equipment, and extending the service life of the motor and related equipment.
Strong compatibility: It can be compatible with various types of motors, such as asynchronous motors, synchronous motors, etc. Whether it is a common standard motor or some special specifications of motors, it can be well adapted to meet the motor drive needs of different customers.
Intelligent control and communication function: It supports multiple communication protocols and can exchange data with the host computer or other devices to achieve remote monitoring and fault diagnosis. Users can understand the operating status of the inverter in real time through computers, mobile phones and other terminals, which is convenient for parameter adjustment and troubleshooting, and improves the convenience and intelligence level of equipment management.
Adapt to different working conditions: It has good grid adaptability and can operate stably under various complex grid environments such as voltage fluctuations and frequency changes. At the same time, corresponding protection measures are adopted for different application environments, such as high-efficiency protection circuit boards, which can provide better anti-interference ability and durability.