Energy-saving charger

Abstract

The invention discloses an energy-saving charger, which comprises a voltage-reducing current-stabilizing circuit, an earth leakage circuit breaker and a rectifier, wherein the earth leakage circuit breaker as a master power switch is respectively connected to a live line and a zero line of a power supply; the pressure-reducing and current-stabilizing circuit is connected with multiple groups of capacitors with different capacities in parallel and then connected to the live line of the power supply in series; and the input end of the rectifier is respectively connected with a power zero line controlled by the earth leakage circuit breaker and the power fire line which is controlled by the earth leakage circuit breaker and connected with the capacitor group in series, and the output end of the rectifier is connected to a storage battery to be charged for realizing charging. According to the energy-saving charger, two ends of a test button of the earth leakage circuit breaker are led out by wires and are connected with normally-opened auxiliary contact points of a sampling controller and a no-load protector to realize the functions of no-load protection and automatic poweroff when the storage battery is completely charged, and output current of the charger is changed by a universal conversion switch, therefore charging requirements of different specifications of storage batteries can be met. The energy-saving charger disclosed by the invention can be widely applicable to charging of storage batteries in vehicle repair plants, motorcades, storage battery business departments and electric vehicles.

Description

technical field [0001] The invention belongs to the technical field of electrical circuits, and relates to a charger, in particular to an energy-saving charger. Background technique [0002] At present, there are various chargers on the market. According to the step-down and rectification methods, there are two types of commonly used chargers. One is rectification with a rectifier transformer step-down diode, which is mainly composed of a rectifier transformer (ZB) and a rectifier. (ZL) composition, its working principle is as follows figure 1 As shown, the rectifier transformer (ZB) provides an AC voltage that matches the load, and is rectified by a diode to form a pulsed DC to charge the battery. The transformer used is an inductive device with low power factor and large power consumption. On the one hand, the transformer is an inductive load. It consumes the reactive power of the grid while consuming the active power of the grid, and there is a certain amount of active p...

AI Technical Summary

Problems solved by technology

This type of charger consumes a lot of energy, and it will change the frequency and waveform of the power grid during charging, and generate harmonics. The nearby radio equipment such as TVs, computers, and mobile phones cannot work normally, and it has high requirements for operators. will damage the charger

The above two types of chargers all have the disadvantage of high energy consumption, especially the thyristor rectifier charger also has the defect of high-order harmonic pollution to the power grid, and because there is no no-load protection and sampling control in the prior art charger circuit, which often leads to imperfect protection, poor safety performance, and inconvenient output current adjustment

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