SMD Electric Power tansformer ,POE transformer ,EP7 SMD tansformer ,EP13SMD tansformer，EPD SMD tansformer IHUA INDUSTRIES CO.,LTD. , https://www.ihuagroup.com
The Hall voltage formula states that for a molded Hall sensor, the product sensitivity KH remains constant. Therefore, the Hall voltage UH is directly proportional to the control current IC and the magnetic flux density B, i.e., UH ∠ICB. By measuring UH using an appropriate circuit, if one of the parameters—either B or IC—is known, the other can be determined. This principle allows the Hall element to measure any unknown quantity that can be converted into B or IC, as well as any quantity that can be expressed as the product of B and I. This forms the basis of electrical parameter measurement.
When the control current IC is kept constant, the magnetic induction intensity B becomes proportional to the current being measured. As a result, a Hall Current Sensor can be used to accurately measure the current. Conversely, if the magnetic induction intensity B is fixed, the control current IC becomes proportional to the measured voltage, enabling the construction of a Hall voltage sensor. These sensors are widely used in measuring AC power factor, electric power, and AC frequency.
From the equation UH = KICB, it's clear that the nature of the output voltage depends on the type of current involved. If the control current IC is DC and the current IO generating the magnetic field B is AC, then the Hall voltage UH will also be AC. When both IC and IO are DC, the output remains DC. In cases where IC is AC and IO is DC, the output voltage UH will be AC at the same frequency as IC, with its amplitude proportional to the measured DC current IO. Additionally, reversing the direction of the measured current IO will reverse the polarity of the output voltage UH. This makes the Hall sensor a versatile tool for measuring both AC and DC currents.