A redundant power supply system for an electro-mechanical brake system for a vehicle is disclosed having at least two brake circuits, wherein each brake circuit has at least two energy storage device modules connected in series in a configuration so that the two modules together can supply electric power to wheel-end brake actuators.

A redundant power supply system for an electro-mechanical brake system for a vehicle is disclosed having at least two brake circuits, wherein each brake circuit has at least two energy storage device modules connected in series in a configuration so that the two modules together can supply electric power to wheel-end brake actuators.

A multi-circuit protection valve assembly, comprises, is attached to or integrated into a main housing, and comprises an air inlet; main outlets; main supply lines; and main overflow valves for protecting the main outlets. The valve assembly further comprises an extension part having, attached to or integrated into an extension housing, an extension inlet; an extension outlet; an extension line; and an extension overflow valve for protecting the at least one extension outlet, wherein the extension housing is detachably fixed to the main housing such that the extension inlet is flow-connected to an auxiliary outlet in the main housing. The extension housing is detachably fixed to the main housing by a hollow screw having a cavity. Compressed air discharged through the auxiliary outlet can be conducted through the cavity inside the hollow screw to the extension overflow valve and the at least one extension outlet.

A multi-circuit protection valve assembly, comprises, is attached to or integrated into a main housing, and comprises an air inlet; main outlets; main supply lines; and main overflow valves for protecting the main outlets. The valve assembly further comprises an extension part having, attached to or integrated into an extension housing, an extension inlet; an extension outlet; an extension line; and an extension overflow valve for protecting the at least one extension outlet, wherein the extension housing is detachably fixed to the main housing such that the extension inlet is flow-connected to an auxiliary outlet in the main housing. The extension housing is detachably fixed to the main housing by a hollow screw having a cavity. Compressed air discharged through the auxiliary outlet can be conducted through the cavity inside the hollow screw to the extension overflow valve and the at least one extension outlet.

Systems and methods allow for controlling brakes of a trailer coupled to a tractor. The systems and methods utilize an inversion valve input between an emergency brake controller and a trailer connection at the tractor. The inversion valve receives a supply air from an output of the emergency brake controller, and a control air output from a treadle valve of the tractor. Depending on the control air, the emergency brakes at the tractor may be released/activated to simulate service brake control without requiring connecting the tractor to the trailer service brake line.

An active short-circuit protection circuit includes: a PWM output switch module connected between an output terminal of a gate drive module and a control terminal of each of lower bridge arm switching transistors of an inverter; a short-circuit protection switch module powered by the battery and converts supplied power into a voltage matching each of the lower bridge arm switching transistors; and a short-circuit protection power supply module connected in series between the short-circuit protection power supply module and the control terminal of each of the lower bridge arm switching transistors, wherein the short-circuit protection switch module is turned on when the voltage of the battery exceeds a specified threshold, to control each of the lower bridge arm switching transistors to be turned on, so that stator windings of the motor are coupled.

An active short-circuit protection circuit includes: a PWM output switch module connected between an output terminal of a gate drive module and a control terminal of each of lower bridge arm switching transistors of an inverter; a short-circuit protection switch module powered by the battery and converts supplied power into a voltage matching each of the lower bridge arm switching transistors; and a short-circuit protection power supply module connected in series between the short-circuit protection power supply module and the control terminal of each of the lower bridge arm switching transistors, wherein the short-circuit protection switch module is turned on when the voltage of the battery exceeds a specified threshold, to control each of the lower bridge arm switching transistors to be turned on, so that stator windings of the motor are coupled.