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Open Loop Hall Effect Current Sensors/Transducers
| 1. Measuring Principle |
- Primary current Ip applied on core, causing Hall voltage rise thanks to the
magnetic induction generated on core.
- Ic is a constant current source to supply Hall sensor. It makes Hall sensor under constant operation
condition.
- Output voltage Vo then is proportional to Ip. This means that the output can get a very good linearity
before core and OP saturation.
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2. Characteristics and Features
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| Measurable Current Range: |
About 3 times of rated current |
Output Signal:
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It is directly proportional to the measured current, both DC and AC measurable. General voltage output Vo is 4V at the rated (nominal) current Irated. Different
Vo versions are also available |
Measurement Accuracy:
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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°C |
3. Dynamic Properties
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a. Response time
- Definition:
The delay time between 90% of measurable current range (3 times of rated current) and
sensor output reaches the coordinated voltage
- specification:
Chenyang open loop current sensors have the Best performance thanks to our best design of layout
and well selection of high slew Rate amplifier.
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b. Noise response
- Voltage pulse applied 300~600V/µs on primary conductor
- With control power supply
- Measuring output voltage (Vo), specification depends on the application situation.
However the smaller, the better
- Chenyang open loop current sensors have the excellent low output voltage (Vo) in
comparison with other sensors.
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c. Output voltage (Vo) linearity:
- The output voltage versus input current relation of an ideal current sensor (without setting
error in residual and output voltage) is indicated by the dot line in right figure
- The continuous line shows the output/input relation of an actual sensors.
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4. Output Voltage (Vo) Performance (at Rated Current 50A)
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- Offset standard specification:40mV
- Output voltage(Vo) standard specification: ±4V ±0.04V
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5. Typical Applications
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- General Purpose Inverter
- AC/DC Variable Speed Drivers
- Battery Supplied Applications
- Uninterruptible Power Supplies
- Switched Mode Power Supplies
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