A power management system for managing power of a climate control unit (CCU) configured to be used with at least one of an electric vehicle, a trailer, or a transport container and at least partially powered by the electric vehicle is disclosed. The system includes a power distribution system that includes a power input, a power distributor electrically connected to the power input, a fault detecting and isolating circuit electrically connected to the power input, and a connection point for receiving the CCU. The connection point is electrically connected to the fault detecting and isolating circuit. A power controller is electrically connected to the power distribution system. The power controller includes a processor and a memory.

A power conversion circuit for an uninterruptible power system, including an inductor, a first capacitor, a second capacitor, a first switch, a second switch, a third switch, a first diode, a second diode, and a third diode body, is provided. A terminal of the second switch is electrically coupled to the inductor through the first switch, and another terminal of the second switch is electrically coupled to a neutral wire and the third switch. An anode and a cathode of the first diode are electrically coupled to the first switch and a positive DC bus, respectively. A cathode and an anode of the second diode are electrically coupled to the first switch and the third switch, respectively. A cathode and an anode of the third diode are electrically coupled to the third switch and a negative DC bus, respectively. In addition, an uninterruptible power system using the same is provided.

The invention relates to a central unit (100) for supplying emergency lighting means (101a, 101b) on a DC bus (101), comprising an AC input (103) for receiving an AC supply signal, an AC/DC converter (104) configured to convert the AC supply signal into a DC supply signal, an electrical energy storage (105), in particular a battery, configured to be charged by the DC supply signal, wherein the electrical energy storage (105) is configured to supply electrical power in an emergency situation, and a DC/DC converter (107) configured to convert a DC output signal of the electrical energy storage (105) into a DC bus voltage and to forward the DC bus voltage to the lighting means (101a, 101b) on the DC bus (101) via an output circuit (109), wherein the output circuit (109) is arranged on a modular card (111), and wherein the modular card (111) is detachably connectable to a base body (102) of the central unit (100).

A system for controlling supply of a device. The device can be a power retention device that requires to be permanently powered. To this end, it can be alternatively powered by a power supply, in a first mode, or by a battery, in a second mode. At least one sensor of the system acquires data related to the battery, such as environmental data, the voltage of the battery or the discharge current of the battery. Based on the data and at least one characteristic curve of the battery, a battery monitoring module is configured to switch between the first and second modes to improve the lifetime of the battery.

A switch arrangement for providing alternative distribution paths in a system for distributing electrical power in a vehicle including electrical power supplies and electrical loads. The switch arrangement includes a first switch configured to be connected to a first electrical element, a second switch configured to be connected to the first electrical element and a second electrical element, and a third switch configured to be connected to the second electrical element and a third electrical element. Each of the first, second, and third switches is independently controllable, and selective operation of each of the first, second, and third switches to its open or closed state interconnects at least two of the first, second, and third electrical elements to establish one of multiple alternative distribution paths to connect one of the power supplies and one of the loads or to connect two of the power supplies.

An Uninterruptible Power Supply (UPS) including an input configured to receive input AC power having an input AC voltage, a backup power input configured to be coupled to a backup power source and to provide DC power to the backup power source for charging, a positive DC bus and a negative DC bus, the positive and negative DC busses being galvanically coupled to the backup power input, and a converter coupled to the input, the backup power input, and the positive and negative DC busses, the converter including a first inductor, a second inductor, a first converter switch configured to couple the first inductor to a neutral connection, a second converter switch configured to couple the second inductor to the positive DC bus, and a third converter switch configured to couple the second inductor to the negative DC bus, wherein the UPS is voltage-frequency independent.

A power system connectable to an electric utility grid includes a local bus connected to at least one non-grid source of electrical energy; an electrical connection between the local bus and an electric utility grid; and a unidirectional AC-to-DC power supply electrically interposed between the electric utility grid and the local bus, the power supply having an AC side and a DC side, wherein the power supply is configured to allow energy flow only from the AC side to the DC side.

A battery backup system comprises an input terminal configured to receive a source voltage from a power source, and an output terminal electrically coupled to the input terminal and a battery and configured to selectively communicate the source voltage to a load when the source voltage is available and to communicate a battery voltage to the load when the source voltage is unavailable. The battery backup system further comprises a power supply configured to convert the source voltage to a charging voltage and control circuitry electrically coupled to the power supply and the battery and configured to communicate the charging voltage to the battery to facilitate charging the battery when the source voltage is available. The control circuitry is configured to measure one or more parameters of the battery to evaluate battery health. When the battery polarity is reversed, battery terminals through which the battery is electrically coupled are shorted to one another, or the battery is removed, the control circuitry is configured to decouple the charging voltage from the battery.

A circuit (100) for use in voltage supply for an electrical device, having a first input (111) configured for connecting with a first voltage source, a second input (121) configured for connecting with a second voltage source, and a common output (133) configured for connecting with an input of the electrical device, comprising a first voltage converter (110) with an input connected to or being the first input (111), and configured to provide DC voltage at a first voltage level (V.sub.1) at an output (113), further comprising a second voltage converter (120) with an input connected to or being the second input (121), and configured to provide DC voltage at a second voltage level (V.sub.2) at an output (123), wherein the second voltage converter (120) is configured not to operate when a voltage level present at its output (123) is higher than a stop threshold, and to operate when a voltage level present at its output (123) is lower than a start threshold, the stop threshold is equal to or higher than the second voltage level (V.sub.2) and lower than the first voltage level (V.sub.1), and the start threshold is equal to or lower than the second voltage level (V.sub.2).

The present disclosure provides an electric motor control system and a vehicle. The electric motor control system includes a motor drive module, a multi-core processing module, and a safety logic module. The multi-core processing module includes a main function core and a lockstep monitoring core. The main function core is configured to obtain sampling data, and when any one of the sampling data, a running status of the main function core, a motor control signal, and a running status of a motor is abnormal, the lockstep monitoring core outputs a safety trigger signal; and the safety logic module is configured to output an instruction for prohibiting execution of the motor control signal to the motor drive module when receiving the safety trigger signal.