With the development of power electronics technology, the original current detection elements (such as shunts and transformers) have been unable to meet the transmission of medium and high frequency, high di/dt, and wide-spectrum current waveforms. Hall current and voltage sensors are to make up for this. The main detection elements with a wide range of applications and prospects that are vacant are:
Hall current and voltage sensors have the following features compared to common transformers:
1. Wide measurement range: It can measure the current and voltage of arbitrary waveforms, such as DC, AC, pulse, triangle waveforms, etc. Even the transient peak current and voltage signals can be faithfully reflected;
2. Fast response: The fastest response time is only 1us.
3. High measurement accuracy: The measurement accuracy is better than 1%, which is suitable for any waveform measurement. Ordinary transformers are inductive components that affect the measured signal waveform after access. The general accuracy is 3% to 5%, and it is only suitable for 50Hz sinusoidal waveforms.
4. Good linearity: better than 0.2%
5. The dynamic performance is good: The response time is fast, can be less than 1us; The response time of the common transformer is 10~20ms.
6. Work frequency bandwidth: Signals in the frequency range of 0~100KHz can be measured.
7. High reliability, average failure-free working time: average time between failures >5 10 hours
8. Strong overload capacity and large measuring range: 0---tens of amps~10,000 amps
9. Small size, light weight, easy to install.
Due to the advantages of Hall current and voltage sensors, it can be widely used in frequency control devices, inverter devices, UPS power supply, inverter welding machine, electroplating, CNC machine tools, computer monitoring systems, power grid monitoring systems and the need for isolated current detection. Voltage in various fields.
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