advantage:

To measure a large DC current, such as tens of amperes, or even larger, hundreds of amperes, what should I do if there is no ammeter with such a large range for current measurement? This requires the use of a shunt. It is a short conductor, which can be of various metals or alloys, and is also connected to terminals; its DC resistance is strictly adjusted; connected in series in a DC circuit, the DC current passes through the shunt, and the two ends of the shunt generate millivolt levels The DC voltage signal causes the pointer of the meter connected to both ends of the shunt to swing, and the reading is the current value in the DC circuit. The so-called shunt is to divide a small current to drive the meter indication. The smaller the ratio of this small current (mA) to the current in the large loop (1A-tens of A), the better the linearity of the ammeter reading and the more accurate. This is a common product for electrical circuits, and there are shunt measures for lightning protection.

advantage:

High accuracy: The accuracy is better than 1% in the working temperature range, which is suitable for the measurement of any waveform; the Hall switch device has no contact, no wear, clear output waveform, no jitter, no bounce, and high position repeatability ( up to μm level).

Wide bandwidth: The rise time of a high-bandwidth current sensor can be less than 1μs; however, the voltage sensor has a narrow bandwidth, generally within 15kHz, and a 6400Vrms high-voltage voltage sensor has a rise time of about 500uS and a bandwidth of about 700Hz.

Wide measurement range: current measurement up to 50KA, voltage measurement up to 6400V.

Solid structure, small size, lightweight, long life, easy installation, low power consumption, high frequency (up to 1MHZ), vibration resistance, not afraid of dust, oil, water vapor, and salt spray pollution or corrosion.

shortcoming:

The interchangeability is relatively poor, the signal changes with temperature and the output is nonlinear. It is best to use a single-chip microcomputer for nonlinear and temperature correction.

Because of these characteristics of Hall sensors, Hall sensors are widely used in variable frequency speed control devices, inverter devices, UPS power supplies, communication power supplies, electric welding machines, electric locomotives, substations, CNC machine tools, electrolytic plating, computer monitoring, power grid monitoring, etc. In facilities that isolate and detect current, as well as emerging fields such as solar, wind, and subway track signaling, automotive electronics, and more.