技術資料

Open Loop Hall Current Sensor/Transducer Simple Introduction
1. Hall effect open loop current sensor/transducers:
a. Primary current Ip applied on core 　　　causing Hall Voltage rise, which is due 　to the magnetic induction generated on 　core. b. Ic is a constant current source to supply 　Hall Senor, which make it under constant 　operation condition. c. Output voltage Vo then is proportion to 　Ip which means it get a very good 　　　linearity before core and OP saturation.

2. Characteristics and feature:

a. Measurable current range:
　 about 3 times of rated current.
b. Output signal:
　 It is directly proportional to the measured current, both DC/AC measurable. General Voltage 　output Vo is 4V at the rated (nominal) current Irate. Different Vo versions are also available.
c. Measurement accuracy:
　Depends on ambient temperature, operating temperature and some other electrical parameters. 　Our current sensors are Factory-calibrated(offset and gain voltage) at an ambient temperature of 25℃

3. Criteria dynamic behavior:

a. Response time:

★. definition:
　the delay time between 90% of measurable 　current range(3 times of rated current) and 　sensor output reach the coordinated Voltage

★.specification:
　BesTeks open loop current sensors have the 　Best performance Through our best design 　of layout and well selection of high slew 　　Rate amplifier.

b. Noise response:

★ Voltage Pulse applied 300~600V/us on 　　　primary conductor.

★ with control power supply on.

★ measure output voltage(Vo),specification is 　　depended on the application situation. 　　　However the smaller , the better.

★ BesTeks open loop current sensors have 　　　the excellent low output voltage(Vo) 　　　while compared to others.

c. Output voltage(Vo) linearity:

★ ideal current sensor (without setting error in 　residual and output voltage) the output 　　voltage versus input current relation 　　　　indicates the dot line in left figure

★ Actual sensors show the continue line in 　　the figure.

4. Output voltage(Vo) performance(sample: Rated current 50A) :

★ offset standard specification:
　 ± 40mV

★ Output voltage(Vo) standard 　　specification:±4±0.04V