sändarspole

A sändarspole, or transmitter coil, is a component used in wireless power transfer systems. Its primary function is to generate a magnetic field when an alternating current flows through it. This magnetic field is then used to transmit energy wirelessly to a receiver coil. The size, shape, and number of turns in the sändarspole are critical design parameters that influence the efficiency and range of the wireless power transfer.

In a typical inductive wireless charging setup, the sändarspole is integrated into the charging base or pad. When connected to a power source, it oscillates at a specific frequency, creating a fluctuating magnetic field. This field extends outwards from the coil. If a compatible receiver coil is brought within this field, the oscillating magnetic flux induces a current in the receiver coil. This induced current can then be rectified and used to charge a battery or power a device.

The effectiveness of a sändarspole is often measured by its inductance and quality factor (Q-factor). Higher inductance generally allows for greater energy transfer, while a high Q-factor indicates that the coil stores energy efficiently with minimal loss. Different applications may require sändarspolar with varying characteristics to optimize for factors such as distance, power output, and coil size. For instance, electric vehicle charging systems utilize larger sändarspolar to achieve higher power transfer rates over a greater distance compared to smaller coils found in smartphone chargers.