In the technological evolution of power electronic equipment, current sensors—as core sensing components—directly influence structural design, cost control, and performance. From photovoltaic (PV) inverters to industrial motor servo drives, industry demand for current sensors is rapidly evolving toward low cost, simplified structure, and high adaptability. With advantages in structure, cost, and integration, open-loop Hall current sensors are gradually replacing traditional closed-loop fluxgate solutions and becoming the core choice for equipment upgrades. This article analyzes the technical upgrade logic and application solutions for current sensors in two core scenarios: PV inverters and industrial motor servo drives, providing a reference for industry technology selection.

PV Inverter Scenario: Multi-node Technical Upgrades Make Open-Loop Hall Solutions the Mainstream Trend

String Detection Node: Dual-dimensional Optimization of Performance and Cost with Through-hole Open-Loop Hall Solutions

Current detection at PV inverter string nodes initially used traditional on-board solutions and later evolved to through-hole designs. Compared with traditional schemes, through-hole structures better meet industry installation needs, greatly improve assembly and disassembly convenience, and further reduce costs. As a cost-effective upgrade model, MAGTRON’s ME series matches string detection requirements in key parameters such as measuring range and accuracy, making it the preferred solution for string current detection and widely adopted in mainstream PV inverter products.

MPPT + Boost Composite Node: Cost Reduction and Efficiency Improvement with Integrated Single-Power Open-Loop Solutions

The core technical trend at MPPT and Boost nodes is the shift from discrete detection to integrated detection and dual-power closed-loop to single-power open-loop. Early PV inverters required separate current sensors for MPPT and Boost nodes using closed-loop, dual-power designs, which occupied more internal space, increased overall costs, and complicated circuit design.

With inverter technology iteration, open-loop Hall current sensors enable integrated detection for both MPPT and Boost nodes, satisfying current sensing with a single device. Meanwhile, single-power supply replaces traditional dual-power design, greatly simplifying circuits. Open-loop Hall solutions offer clear cost advantages over closed-loop fluxgate types while fully meeting detection accuracy and response speed requirements. The upgrade from dual-device, dual-power, dual closed-loop to single-device, single-power, single open-loop significantly reduces hardware costs and simplifies inverter circuit design for automated mass production.

AC-Side Detection: Gradual Replacement of Closed-Loop Solutions and Large-Scale Adoption of Open-Loop Hall Solutions

Currently, some PV inverters still use low-cost closed-loop fluxgate sensors for AC-side current detection, but industry cost optimization is driving a shift to open-loop Hall solutions. MAGTRON’s MG series open-loop Hall current sensors, with mature technology and lower costs, have become an ideal alternative to closed-loop solutions for AC-side applications. Their detection performance fully meets AC-side requirements, and they are gradually adopted by mainstream inverter brands, becoming the mainstream upgrade direction for AC-side current detection.

The upgrade logic across PV inverter nodes centers on cost reduction, structural simplification, and high integration. The MG series open-loop Hall current sensors, with comprehensive advantages in cost, structure, and adaptability, cover string, MPPT+Boost, and AC-side nodes, making them core supporting components for PV inverter technology upgrades.

Industrial Motor Servo Drives: Precise Three-Phase Current Detection with Open-Loop Sensors for Harsh Industrial Conditions

In industrial control, motor servo drives—core power control equipment—rely on precise UVW three-phase current detection to ensure operational accuracy and stability. Consistent with PV inverter upgrade logic, industrial demand for cost and structural optimization is also driving current sensor migration to open-loop solutions.

Traditional closed-loop solutions offer high accuracy but struggle to meet the cost and structural complexity requirements of large-scale industrial applications. MAGTRON’s MG series open-loop Hall current sensors are optimized for industrial scenarios in accuracy, room-temperature bandwidth, and response speed, precisely matching three-phase current detection for motor servo drives. They offer clear cost advantages over closed-loop solutions and a structure suitable for industrial equipment layout and automated mass production.

Currently, the MG series open-loop current sensors are applied in motor servo drives of leading industrial control brands, becoming the preferred solution for UVW three-phase current detection and supporting cost reduction, efficiency improvement, and technological upgrades for industrial equipment.

MAGTRON Launches New MG Series – Core Advantages: Triple Upgrades in Structure, Manufacturing, and Performance

The new MG series open-loop current sensors have become the preferred upgrade choice for PV inverters and industrial motor servo drives due to three core advantages built around extreme simplicity, intelligent manufacturing, and superior performance, addressing industry pain points across design, production, and performance to deliver cost reduction, efficiency improvement, and performance enhancement.

Structural Simplification: Simplified Design Enables Zero-Cost Upgrades for Customers

Adopting an extreme simplicity and efficiency design philosophy, the new MG series optimizes magnetic circuit design and integrates core components to drastically streamline internal structure and eliminate redundant assembly parts. Simplification results in a more compact size, optimized production processes, reduced assembly steps, and lower assembly difficulty, laying a solid foundation for fully automated production.

Meanwhile, the product adheres to the compatibility is key design principle, achieving full compatibility with older models in package, pin definition, and electrical parameters. For PV inverter and industrial motor servo drive manufacturers, upgrades require no PCB redesign or assembly process adjustments, enabling seamless replacement and greatly reducing time and R&D costs—truly zero-cost upgrades.

Intelligent Manufacturing Upgrade: Full-Process Automation for Stable Quality and Increased Capacity

The new MG series abandons manual-dominated production and implements a fully automated production line covering assembly, pin bending, cutting, chip programming, performance testing, laser marking, and finished product packaging. Equipped with high-precision industrial robots, automatic test benches, and intelligent sorting systems, the line achieves a closed-loop, unmanned production process.

Compared with traditional production, the new line multiplies efficiency and sharply reduces unit production time, perfectly matching growing capacity demand in PV and industrial control. More importantly, automation greatly improves product quality consistency: test data are fully traceable, dispersion of key indicators (zero drift, accuracy error) is significantly reduced, eliminating quality fluctuations from manual production and ensuring stable and reliable supply for customers.

Superior Performance: Precision and Reliability for Core PV and Industrial Control Needs

Structural simplification and manufacturing upgrades are never achieved at the cost of performance. The new MG series uses higher-reliability chips and optimizes magnetic shielding and signal processing algorithms to deliver equal or better performance, precisely defining core parameters of open-loop Hall current sensors and addressing differentiated technical pain points across scenarios. Key parameters reach industry-leading levels:

Conclusion

The launch of MAGTRON’s new MG series achieves full-dimensional breakthroughs in open-loop current sensor design, production, and performance. Its compatible design enables zero-cost upgrades for customers; full-process automation guarantees quality and capacity; and industry-leading performance precisely meets core detection needs in PV and industrial control, providing a new solution for technology upgrades and cost optimization of PV inverters, industrial motor servo drives, and other equipment.