电感链路的闭环传感器补偿E类驱动器

B. Lenaerts, F. Peeters, R. Puers
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引用次数: 4

摘要

当使用E类电路驱动电感链路时,对发送线圈的电感值允许有很小的公差。因此,可变形线圈与开环E级设计不兼容。通过将换能器与变送器电感串联起来,无论变送器线圈变形如何,都可以保持总E类电感恒定。这是通过控制回路来实现的,该控制回路将传感器引导到适当的电感值。对于所实现的闭环电路,当变送器线圈的电感变化高达27%时,保持E级状态。与先前报道的技术相比,传感器控制的主要优点是固定的操作频率。
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Closed-Loop Transductor-Compensated Class E Driver for Inductive Links
When a class E circuit is employed to drive an inductive link, very little tolerance is allowed on the inductance value of the transmitter coil. Deformable coils are thus not compatible with an open- loop class E design. By connecting a transductor in series with the transmitter inductance, it is possible to keep the total class E inductance constant, regardless of the transmitter coil deformation. This is achieved through a control loop that steers the transductor to the appropriate inductance value. For the realized closed-loop circuit, class E regime is maintained for inductance variations of the transmitter coil of up to 27 %. The principal advantage of transductor control compared to earlier reported techniques, is the fixed frequency of operation.
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