The controller has a power supply cable, and a control cable which transmits a control signal to a regulator for regulating an auxiliary heater such that the power supply cable simultaneously serves as the control cable. The control signal has a rectangle-...

The device (10) has multiple heating elements (14) assembled to a heating block (12) held in a frame (18). A control device (28) controls the elements via power transistors of the control device, where control device together with the heating block forms a...

PTC heater, especially for a motor vehicle heating or air-conditioning system, comprises one or more PTC elements that convert electrical power into heat. A control unit evaluates measurement values from a device monitoring electricity consumption and acco...

Vehicle electrical heating arrangement comprises a number of heating elements (14) assembled in a heating block (12). The block is held in a frame (18) with a control device (28) for controlling the heating elements. Control device and frame mounted heatin...

The arrangement has a heating element (4) for converting the electrical power drawn from an electrical energy supply (6) into heat and a regulating system (1) for regulating the supply of electrical energy to the heating element. The regulating system rece...

The heating body (1) has at least one heater, at least one power device (3) that supplies the heater with power and at least one controler designed to derive a characteristic temperature for the heater. The controller controls the heater power depending on...

The electric heater has several heating elements assembled to form a heating block mounted in a rectangular frame and a controller forming a unit with the heating block and with power transistors (11) on a circuit board (10) for setting the currents to the...

The heater for a motor vehicle passenger compartment has a casing (1) in which cooling water can circulate. A heater (6,7,9) is connected to a reservoir (5) and heats the water by convection through the casing wall. The heater has controls (11,15) which su...

The heater has heating elements (2) in a block in a rectangular frame (3-5) and a controller forming a unit with the block. The heating power of the heating elements can be adjusted via the current flowing through them and the controller contains power tra...