Sinomags, a prolific developer in China of magnetic sensing products and the parent company of Sensitec GmbH in Germany, has recently launched several new current sensors featuring tunnel magnetoresistance (TMR) technology for power electronics design.
The STK-626C, shown above, is a high frequency response & low internal resistance chip-level current sensor. With the wide application of third-generation power semiconductor devices in power electronics systems, the system switching frequency and operating current frequency continue to rise. As the core of system control, current detection has put forward higher requirements for the frequency response, bandwidth, internal resistance and accuracy of sensors. Using tunnel magnetoresistance (TMR) technology, the new sensor has core parameters such as step response time within 200 ns, 1 MHz band-width (-3dB), and 0.1 mΩ ultra-low internal resistance.
Amid the boom in high-frequency power electronics technology, the limitations of traditional current sensors in bandwidth, response speed or size can be challenged to meet the core demands of scenarios such as high-frequency power electronic equipment and precision testing instruments. Against this background, Sinomags has launched the upgraded STK-BS-SG current sensor module.
Equipped with TMR core technology, the coreless design eliminates hysteresis loss. With 1 MHz bandwidth + 200 ns ultra-fast frequency response, it accurately captures high-frequency pulse currents. The 100 A-1000 A wide range covers diverse scenarios, inheriting the advantages of ±1% high precision and 4 kV high isolation, ensuring stability and reliability. The coreless design eliminates the use of traditional magnetic core structure and magnetic saturation issues.
Driven by the new energy revolution, power electronics upgrading, and accelerated industrial automation, the industry is rapidly entering a new era defined by high frequency, high efficiency, and large current, notes Sinomags. As the sensory nerve of power electronic systems, current sensor response speed, bandwidth limit, and large-current measurement capability can be bottlenecks for equipment performance breakthroughs.
Following the high-frequency trend, Sinomags has also launched STK-HD/KG1. With 100 ns ultra-fast response, 2 MHz ultra-wide bandwidth, and 150 A ultra-large range, all based on TMR technology as the mainstream for high-frequency current measurement. Featuring a next-generation TMR chip, it is able to accurately capture high-frequency pulse current.
Founded in 2013, Sinomags Technology specializes in the R&D and manufacturing of magnetic sensors, integrating design, development, production and sales into its vertically operational model while adhering to a philosophy of independent innovation. Headquarters are in Bengbu, located about 500 km northwest of Shanghai. The company also has a research and development center for magnetic encoders, ESSTMAGS, located in Wuxi.
