Voltage stabilized electronic power switch

Abstract

The invention is an electronic power switch composed of field effect tube and is designed for controlling charging and discharging of electrically-propelled vehicle. It comprises an electronic power switch circuit and a switch driving circuit. The power switch circuit composed of switch transistor is connected to the main power supply circuit in series, and the control electrode of switch transistor is connected to the switch driving circuit; the input of switch driving circuit is connected to the switch control circuit, and its output is connected to the voltage stabilizing circuit; the switch control circuit is composed of the R-S trigger; its working power supply and main power supply use different sources. The invention adopts an electronic voltage regulation circuit, a power separation between the switch control circuit and the main power circuit and a short circuit protection so as to effectively control the voltage fluctuation of circuit and power on/off of circuit.

Description

technical field [0001] The invention relates to an electronic switch, in particular to an electronic power switch composed of field effect tubes, which is mainly used for the control of charging and discharging of electric vehicles. Background technique [0002] Conventional electronic power switching circuits are composed of field effect switching transistors, and the switching transistors are turned on and off by controlling their control gates. Under general application conditions, this kind of electronic power switch is relatively reliable. However, when the gate control voltage is unstable, that is, when the voltage does not reach the rated value, the switching transistor cannot be turned on or cannot be completely turned on, making the switch control failure or reduced conduction efficiency. For example, on a self-charging electric bicycle, when the vehicle is sliding or the cart is walking, the charging current generated by the charging generator is too small to push...

AI Technical Summary

Problems solved by technology

In general application conditions, this kind of electronic power switch is relatively reliable. However, when the gate control voltage is unstable, that is, when the voltage does not reach the rated value, the switching transistor cannot be turned on or cannot be completely turned on, making the switch control Failure or reduced conduction efficiency

For example, on a self-charging electric bicycle, when the vehicle is sliding or the cart is walking, the charging current generated by the charging generator is too small to push the electronic switch tube to conduct or not to conduct completely, so it cannot charge the battery. Part of the energy cannot be effectively recycled

Therefore, when conventional electronic power switches are used for charging control of self-charging electric vehicles, the efficiency of energy recycling is very low.

If a relay is used as a switching device under the above usage conditions, the power consumption of the drive circuit and the relay will be much higher than that of the electronic switch, which will reduce the charging efficiency of the vehicle.

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