应用笔记

一般考虑

1.The sensor uses polar electronic components. When connecting, any error in power source polarity will cause damage. Please exercise care.
The current sensor uses polarity-sensitive electronic components; please insure proper polarity of PSU to prevent damage to the sensor electronics.

2.Static electricity or excessive voltage can increase an offset voltage in the Hall element, and cause offset voltage to change. Please exercise care in handling and application.

3.In order to prevent the influence of noise, the use of twisted cable or shielded cable for the output line is recommended

4.If using this device within a magnetic field generated by other devices, the specified accuracy may not be obtainable.

5.Our products (several models are excluded ） are adjusted with the trimming method by the measurement condition (Load resistance, Power supply voltage) of specification sheets.
Therefore, characteristics (Offset, Output, etc) and its deviation may be changed in different circuit conditions from the measurement condition.
All change characteristic items are not indicated on specification sheets.

6.The performance of current sensors with through-hole (aperture) is dependent on the position of the primary conductor. Tamura specifications are based on a primary conductor completely filling the through-hole (aperture) area.

7.The current sensor rated current in DC Amps.

8.Please use mating connector with equivalent terminal plating material to insure proper operation and avoid possibility of ‘galvanic corrosion’.

9.Please do not store in high-temperature and high-humidity storage environment.
Please use it after confirming soldering when it is kept for six months or more. (product soldered with substrate)

10.Items in this catalog are not suitable for vehicular applications.

11.The information in this document is subject to change without notice due to product/technology improvement, etc. Before using this document, please confirm that this is the latest version.

开环

L＊＊Series(＊＊ is Number)

1.High frequency primary current may result in excessive heating in iron magnetic core and cause damage to internal circuitry; for high frequency applications select current sensor with ferrite core material.

2.If the measured current exceeds the rated current, magnetic core saturation will occur and the output voltage signal will not be linearly proportional to the measured current.

闭环

S＊＊Series(＊＊ is Number)

1.For closed loop current sensors please insure the power supply voltage is balanced, symmetrical, and, applied simultaneously to avoid potential increase in DC offset error.

2.Maximum rated current measurement duration is time-dependent. Maximum rated current applied in excess of the time limit can result in damage to internal electronic circuitry; please consult Tamura for assistance.

3.When using a measurement resistor to convert current output to voltage output select a resistor with stable temperature characteristic to insure accuracy of the output voltage.

4.Compensation current supplied to the secondary winding varies in proportion to the measured current based on the conversion ratio. (If/KN; KN=# secondary turns) Please insure the PSU has required current capacity to supply compensation current to the secondary winding.

磁通门

F＊＊Series(＊＊ is Number)

1.Compensation current supplied to the secondary winding varies in proportion to the measured current. Please insure the PSU has required current capacity to supply compensation current to the secondary winding.

2.There is 450kHz ripple voltage present on the output and reference output voltage signals . An external capacitor maybe added if necessary.