Is there a non-contact current sensor?

90houyidai

Is there a non-contact current sensor? [Copy link]

 

As title

littleshrimp

Hall. Fluxgate. Mutual inductance

maychang

The commonly used "current sensors" are all non-contact type. "Contact" should mean that the circuit to be tested is electrically connected to the measuring circuit. Such "current sensors" are usually called shunts, which are actually small resistors.

melau

It seems that AKM has a current sensor, I wonder if it is contactless?

90houyidai

maychang posted on 2017-1-12 07:58 The commonly used "current sensors" are all non-contact type. "Contact" should mean that the circuit to be tested and the measuring circuit are electrically connected. Such "...

I mainly want to find out whether the non-mutual inductance and mutual inductance need to pass through the magnetic core.

90houyidai

littleshrimp posted on 2017-1-11 23:29 Hall. Fluxgate. Mutual inductance

I have never seen a fluxgate, can you explain the principle?

maychang

90houyidai posted on 2017-12-25 11:16 I am mainly looking for whether non-mutual inductance and mutual inductance both need to pass through the magnetic core

There is a type of current transformer whose core has a movable opening that can be opened, put on the current-carrying wire and then closed. It is generally called a clamp ammeter.

littleshrimp

90houyidai posted on 2017-12-25 11:17 I have never seen a fluxgate before. Can you explain the principle?

http://www.ti.com.cn/product/cn/DRV425

仙猫

It is best for the original poster to write down the measurement requirements clearly first. Non-contact type generally measures large currents, and it is not easy to measure small currents.

chinaping

Hall

gs001588

90houyidai posted on 2017-12-25 11:16 I mainly want to find out whether non-mutual inductance and mutual inductance all need to pass through the magnetic core

Non-contact ones are all mutual inductance (Hall current sensors, as long as they use magnetism, are all mutual inductance).

lct2000

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