Electromagnetic Relay Parallel-Series Coil Switching

The patent applies dynamics by making the circuit configuration changeable from static to dynamic. The switching element transitions the excitation coils between parallel and series connections based on the armature position, allowing the total resistance and current to vary dynamically. This resolves the contradiction by providing high current (low resistance) during armature closure and low current (high resistance) during holding, thus achieving sufficient magnetic field strength only when needed while reducing continuous power consumption and heat generation.

The patent implements periodic action through two distinct operational phases: a pull-in phase with parallel connection providing high current for armature closure, and a holding phase with series connection providing reduced current. This periodic switching between high-power and low-power states allows the system to achieve the necessary magnetic field strength transiently while minimizing continuous energy loss and heat generation.

The dynamic switching between parallel and series connections allows the system to provide high current transiently for reliable armature closure, then transition to low current for holding. This temporal separation ensures reliable closing while minimizing continuous heat generation, as the high-current state exists only briefly during the pull-in phase.

The switching element is configured to preemptively transition from parallel to series connection as soon as the armature reaches the contact position. This preliminary action prevents the sustained high current that would cause excessive heat loss, while still ensuring reliable closure has been achieved. The system anticipates the end of the closure phase and switches to energy-saving mode before unnecessary heating can occur.

The patent extracts the current control function from complex PWM electronics and implements it through a simple switching element that reconfigures the existing excitation coil circuitry. By taking out the need for microelectronic PWM controllers and replacing it with a basic switching component, the solution reduces power consumption while avoiding the device complexity that would accompany electronic PWM implementation.

The switching element acts as an intermediary that provides simple on/off control between the power source and the excitation coils, transitioning them between parallel and series configurations. This intermediary component achieves current reduction without requiring complex PWM electronics, thus lowering both power consumption and device complexity compared to electronic control solutions.