40A current sense transformers to AEC-Q200
- Author:Ella Cai
- Release on:2017-11-02
Coilcraft’s has introduced a series of current sense transformers, operating up to 40A over 400Hz to 1MHz, and offering 4,000Vrms isolation voltage between the sense and output windings, using insulation reinforced to UL 60950-1.
To minimise power loss, the resistance of the sense coil is very low: 840μΩ in all versions of the series, dubbed CST2020.
Available in four turns ratios 1:70, 1:100, 1:200 and 1:300, they are intended to provide output feedback for load current measurement and control in switching power supplies, over-load protection and short-circuit protection.
AEC-Q200 Grade 1 (-40 to +125°C) qualification means they are suitable for automotive applications such as measurement in traction motor and battery management systems, according to the firm. “Other applications include aerospace power management, three-phase solar inverters, industrial motor controls and other applications requiring high isolation between the sense and output windings.”
To minimise power loss, the resistance of the sense coil is very low: 840μΩ in all versions of the series, dubbed CST2020.
Available in four turns ratios 1:70, 1:100, 1:200 and 1:300, they are intended to provide output feedback for load current measurement and control in switching power supplies, over-load protection and short-circuit protection.
AEC-Q200 Grade 1 (-40 to +125°C) qualification means they are suitable for automotive applications such as measurement in traction motor and battery management systems, according to the firm. “Other applications include aerospace power management, three-phase solar inverters, industrial motor controls and other applications requiring high isolation between the sense and output windings.”
