Energy regulator
An energy regulator is a control for electric hobs (including ceramic hobs ) in order to be able to vary their average power continuously. This is done by rhythmically switching the power supply of the respective individual heating resistor on and off ( pulse duration modulation ); this is usually realized with a heated temperature switch. There are seldom designs in which an electronic power controller (for example with vibration packet control ) takes on this task.
functionality
A cam disk connected to the rotary knob provides a preload which presses the two switching contacts together. When the switching contacts are closed, current flows through the heating coil in the energy regulator and heats the bimetal strip, which bends as a result. After a while, the bimetal strip has heated up enough that the switch contact opens. After a certain cooling time, the bimetal strip bends back and closes the switching contact again. The heating coil now heats up again and after a certain time the switching contact opens again. Depending on the angle of rotation, the preload changes due to the cam. This changes the duty cycle , i.e. the time ratio between the heating coil switched on and switched off.
The heating coil of the hob, which heats up in the same way, lies parallel to the heating coil in the energy regulator. The heating coil in the energy regulator thus serves as a "temperature model" for the hotplate: Without the need for a cumbersome temperature sensor to be installed, this results in a particularly long first warm-up phase when the hotplate is cold, in which the hotplate remains switched on continuously because the heating coil in the energy regulator also has to heat up to working temperature first.
See also
Web links
- Energy regulation
- Energy regulator in stove circuits
- Association for energy-efficient applications e. V. (see section Hotplates with stepless setting )